Journal ArticleJ Vasc Interv Radiol · October 2024
PURPOSE: To evaluate safety and impact of particle embolization on pancreatic function in a pig model. MATERIALS AND METHODS: Embolization of the dorsal pancreatic artery using 100-300-μm particles was performed on 14 Yorkshire pigs. Baseline and post-embo ...
Full textLink to itemCite
Journal ArticleFood Chem Toxicol · June 2024
Sucralose, a sugar substitute first approved for use in 1991, is a non-caloric sweetener regulated globally as a food additive. Based on numerous experimental animal studies (dating to the 1980s) and human epidemiology studies, international health agencie ...
Full textLink to itemCite
Journal ArticlemBio · April 10, 2024
UNLABELLED: Chlamydiae are obligate intracellular bacterial pathogens that may cause genital pathology via induction of destructive host immune responses. Human-adapted Chlamydia trachomatis causes inflammatory disease in human hosts but is easily cleared ...
Full textLink to itemCite
Journal ArticleSci Adv · April 5, 2024
Fewer than 20% of triple-negative breast cancer patients experience long-term responses to mainstay chemotherapy. Resistant tumor subpopulations use alternative metabolic pathways to escape therapy, survive, and eventually recur. Here, we show in vivo, lon ...
Full textLink to itemCite
Journal ArticlePolymers (Basel) · April 5, 2024
Ethyl cellulose-ethanol (ECE) is emerging as a promising formulation for ablative injections, with more controllable injection distributions than those from traditional liquid ethanol. This study evaluates the influence of salient injection parameters on f ...
Full textLink to itemCite
Journal ArticleThe Prostate · March 2024
BackgroundProstate cancer (PCa) continues to be one of the leading causes of cancer deaths in men. While androgen deprivation therapy is initially effective, castration-resistant PCa (CRPC) often recurs and has limited treatment options. Our previ ...
Full textCite
Journal ArticlePLoS One · 2024
Mice engineered with a G12D versus Q61R mutation in Kras exhibited differences in tumorigenesis. Namely, the incidence or grade of oral or forestomach squamous epithelial lesions was more prevalent in the KrasG12D background while hematolymphopoietic disea ...
Full textLink to itemCite
Journal ArticleFront Oncol · 2024
PURPOSE: To identify significant relationships between quantitative cytometric tissue features and quantitative MR (qMRI) intratumorally in preclinical undifferentiated pleomorphic sarcomas (UPS). MATERIALS AND METHODS: In a prospective study of geneticall ...
Full textLink to itemCite
Journal ArticlemBio · August 31, 2023
The inflammatory bowel diseases (IBD) occur in genetically susceptible individuals who mount inappropriate immune responses to their microbiota leading to chronic intestinal inflammation. Whereas IBD clinical presentation is well described, how interaction ...
Full textLink to itemCite
Journal ArticleSurg Endosc · August 2023
BACKGROUND: Many surgeons in low- and middle-income countries have described performing surgery using gasless (lift) laparoscopy due to inaccessibility of carbon dioxide and reliable electricity, but the safety and feasibility of the technique has not been ...
Full textLink to itemCite
Journal ArticleMol Ther Methods Clin Dev · June 8, 2023
Glycogen storage disease type Ia (GSD Ia) is the inherited deficiency of glucose-6-phosphatase (G6Pase), associated with life-threatening hypoglycemia and long-term complications, including hepatocellular carcinoma formation. Gene replacement therapy fails ...
Full textLink to itemCite
Journal ArticleSci Transl Med · April 19, 2023
Glutaric aciduria type I (GA-1) is an inborn error of metabolism with a severe neurological phenotype caused by the deficiency of glutaryl-coenzyme A dehydrogenase (GCDH), the last enzyme of lysine catabolism. Current literature suggests that toxic catabol ...
Full textLink to itemCite
Journal ArticleJ Vasc Interv Radiol · October 2024
PURPOSE: To evaluate safety and impact of particle embolization on pancreatic function in a pig model. MATERIALS AND METHODS: Embolization of the dorsal pancreatic artery using 100-300-μm particles was performed on 14 Yorkshire pigs. Baseline and post-embo ...
Full textLink to itemCite
Journal ArticleFood Chem Toxicol · June 2024
Sucralose, a sugar substitute first approved for use in 1991, is a non-caloric sweetener regulated globally as a food additive. Based on numerous experimental animal studies (dating to the 1980s) and human epidemiology studies, international health agencie ...
Full textLink to itemCite
Journal ArticlemBio · April 10, 2024
UNLABELLED: Chlamydiae are obligate intracellular bacterial pathogens that may cause genital pathology via induction of destructive host immune responses. Human-adapted Chlamydia trachomatis causes inflammatory disease in human hosts but is easily cleared ...
Full textLink to itemCite
Journal ArticleSci Adv · April 5, 2024
Fewer than 20% of triple-negative breast cancer patients experience long-term responses to mainstay chemotherapy. Resistant tumor subpopulations use alternative metabolic pathways to escape therapy, survive, and eventually recur. Here, we show in vivo, lon ...
Full textLink to itemCite
Journal ArticlePolymers (Basel) · April 5, 2024
Ethyl cellulose-ethanol (ECE) is emerging as a promising formulation for ablative injections, with more controllable injection distributions than those from traditional liquid ethanol. This study evaluates the influence of salient injection parameters on f ...
Full textLink to itemCite
Journal ArticleThe Prostate · March 2024
BackgroundProstate cancer (PCa) continues to be one of the leading causes of cancer deaths in men. While androgen deprivation therapy is initially effective, castration-resistant PCa (CRPC) often recurs and has limited treatment options. Our previ ...
Full textCite
Journal ArticlePLoS One · 2024
Mice engineered with a G12D versus Q61R mutation in Kras exhibited differences in tumorigenesis. Namely, the incidence or grade of oral or forestomach squamous epithelial lesions was more prevalent in the KrasG12D background while hematolymphopoietic disea ...
Full textLink to itemCite
Journal ArticleFront Oncol · 2024
PURPOSE: To identify significant relationships between quantitative cytometric tissue features and quantitative MR (qMRI) intratumorally in preclinical undifferentiated pleomorphic sarcomas (UPS). MATERIALS AND METHODS: In a prospective study of geneticall ...
Full textLink to itemCite
Journal ArticlemBio · August 31, 2023
The inflammatory bowel diseases (IBD) occur in genetically susceptible individuals who mount inappropriate immune responses to their microbiota leading to chronic intestinal inflammation. Whereas IBD clinical presentation is well described, how interaction ...
Full textLink to itemCite
Journal ArticleSurg Endosc · August 2023
BACKGROUND: Many surgeons in low- and middle-income countries have described performing surgery using gasless (lift) laparoscopy due to inaccessibility of carbon dioxide and reliable electricity, but the safety and feasibility of the technique has not been ...
Full textLink to itemCite
Journal ArticleMol Ther Methods Clin Dev · June 8, 2023
Glycogen storage disease type Ia (GSD Ia) is the inherited deficiency of glucose-6-phosphatase (G6Pase), associated with life-threatening hypoglycemia and long-term complications, including hepatocellular carcinoma formation. Gene replacement therapy fails ...
Full textLink to itemCite
Journal ArticleSci Transl Med · April 19, 2023
Glutaric aciduria type I (GA-1) is an inborn error of metabolism with a severe neurological phenotype caused by the deficiency of glutaryl-coenzyme A dehydrogenase (GCDH), the last enzyme of lysine catabolism. Current literature suggests that toxic catabol ...
Full textLink to itemCite
Other · April 3, 2023
<p>d16HER2 mammary intraepithelial neoplasm. d16HER2 shown in magenta. Krt14 antibody staining shown in green.</p> ...
Full textCite
Other · April 3, 2023
<p>Supplementary Table 1: Cluster-specific markers from all cells (8,486 cells) Supplementary Table 2: Cluster-specific markers from all epithelial cells (3,843 cells) Supplementary Table 3: Cluster-specific markers from all immune cells (1,8 ...
Full textCite
Other · April 3, 2023
<p>d16HER2 mammary intraepithelial neoplasm. d16HER2 shown in magenta. Krt14 antibody staining shown in green.</p> ...
Full textCite
Other · April 3, 2023
<div>Abstract<p>HER2-positive breast cancers are among the most heterogeneous breast cancer subtypes. The early amplification of HER2 and its known oncogenic isoforms provide a plausible mechanism in which distinct programs of tumor het ...
Full textCite
Other · April 3, 2023
<p>Supplementary Table 1: Cluster-specific markers from all cells (8,486 cells) Supplementary Table 2: Cluster-specific markers from all epithelial cells (3,843 cells) Supplementary Table 3: Cluster-specific markers from all immune cells (1,8 ...
Full textCite
Other · April 3, 2023
<p>Long-term metastases study of an autochthonous p53/MCA mouse model of STS induced by Cre-LoxP technology using TRP53 fl/fl mice</p> ...
Full textCite
Other · April 3, 2023
<p>Long-term metastases study of an autochthonous p53/MCA mouse model of STS induced by Cre-LoxP technology using TRP53 fl/fl mice</p> ...
Full textCite
Other · April 3, 2023
<p>Long-term survival of an autochthonous p53/MCA mouse model in immunocompetent 129/SvJae wild-type mice induced by CRISPR/Cas9</p> ...
Full textCite
Other · April 3, 2023
<p>Long-term survival of an autochthonous p53/MCA mouse model in immunocompetent 129/SvJae wild-type mice induced by CRISPR/Cas9</p> ...
Full textCite
Other · April 3, 2023
<div>Abstract<p>This study aims to investigate whether adding neoadjuvant radiotherapy (RT), anti-programmed cell death protein-1 (PD-1) antibody (anti–PD-1), or RT + anti-PD-1 to surgical resection improves disease-free survival for mi ...
Full textCite
Other · April 3, 2023
<div>Abstract<p>This study aims to investigate whether adding neoadjuvant radiotherapy (RT), anti-programmed cell death protein-1 (PD-1) antibody (anti–PD-1), or RT + anti-PD-1 to surgical resection improves disease-free survival for mi ...
Full textCite
Other · April 3, 2023
<div>Abstract<p>HER2-positive breast cancers are among the most heterogeneous breast cancer subtypes. The early amplification of HER2 and its known oncogenic isoforms provide a plausible mechanism in which distinct programs of tumor het ...
Full textCite
Journal ArticleBiomaterials · March 2023
Many biologics have a short plasma half-life, and their conjugation to polyethylene glycol (PEG) is commonly used to solve this problem. However, the improvement in the plasma half-life of PEGylated drugs' is at an asymptote because the development of bran ...
Full textLink to itemCite
Journal ArticleToxicol Sci · February 17, 2023
Perfluorobutanesulfonic acid (PFBS) is a replacement for perfluorooctanesulfonic acid (PFOS) that is increasingly detected in drinking water and human serum. Higher PFBS exposure is associated with risk for preeclampsia, the leading cause of maternal and i ...
Full textLink to itemCite
Journal ArticleAm J Pathol · February 2023
Head and neck squamous cell carcinoma (HNSCC) is a heterogeneous disease where, in advanced stages, clinical and pathologic stages do not correlate with outcome. Molecular and genomic biomarkers for HNSCC classification have shown promise for prognostic an ...
Full textOpen AccessLink to itemCite
Journal ArticleMol Cancer Ther · January 3, 2023
This study aims to investigate whether adding neoadjuvant radiotherapy (RT), anti-programmed cell death protein-1 (PD-1) antibody (anti-PD-1), or RT + anti-PD-1 to surgical resection improves disease-free survival for mice with soft tissue sarcomas (STS). ...
Full textOpen AccessLink to itemCite
Journal ArticleBiomaterials · January 2023
Intraperitoneal adhesions (IAs) are a major complication arising from abdominal repair surgeries, including hernia repair procedures. Herein, we fabricated a composite mesh device using a macroporous monofilament polypropylene mesh and a degradable elastom ...
Full textLink to itemCite
Journal ArticleFood Chem Toxicol · January 2023
Aspartame, an artificial sweetener commonly used as a sugar substitute, is currently authorized for use in more than 100 countries. Hundreds of studies, conducted in various countries dating back to the 1970s, have shown that aspartame is safe at real-worl ...
Full textLink to itemCite
Journal ArticleiScience · December 22, 2022
Nucleic acid-binding polymers can have anti-inflammatory properties and beneficial effects in animal models of infection, trauma, cancer, and autoimmunity. PAMAM G3, a polyamidoamine dendrimer, is fully cationic bearing 32 protonable surface amines. Howeve ...
Full textLink to itemCite
Journal ArticleComp Med · December 1, 2022
A Cancer Rainbow mouse line that expresses 3 fluorescently labeled isoforms of the tumor-driver gene HER2 (HER2BOW) was developed recently for the study of tumorigenesis in the mammary gland. The expression of 1 of the 3 HER2 isoforms in HER2BOW mice is in ...
Full textLink to itemCite
Journal ArticleCancers (Basel) · November 23, 2022
Ductal carcinoma in situ (DCIS) of the breast is often managed by lumpectomy and radiation or mastectomy, despite its indolent features. Effective non-invasive treatment strategies could reduce the morbidity of DCIS treatment. We have exploited the high he ...
Full textLink to itemCite
Journal ArticleNat Chem Biol · October 2022
SARS-CoV-2 entry into cells requires specific host proteases; however, no successful in vivo applications of host protease inhibitors have yet been reported for treatment of SARS-CoV-2 pathogenesis. Here we describe a chemically engineered nanosystem encap ...
Full textLink to itemCite
Journal ArticleToxicol Pathol · October 2022
The 2022 annual National Toxicology Program Satellite Symposium, entitled "Pathology Potpourri," was held in Austin, Texas at the Society of Toxicologic Pathology's 40th annual meeting during a half-day session on Sunday, June 19. The goal of this symposiu ...
Full textLink to itemCite
Journal ArticleSci Total Environ · September 10, 2022
Mixtures of per- and polyfluoroalkyl substances (PFAS) are often found in drinking water, and serum PFAS are detected in up to 99% of the population. However, very little is known about how exposure to mixtures of PFAS affects maternal and fetal health. Th ...
Full textLink to itemCite
Journal ArticleElife · September 7, 2022
Despite multiple possible oncogenic mutations in the proto-oncogene KRAS, unique subsets of these mutations are detected in different cancer types. As KRAS mutations occur early, if not being the initiating event, these mutational biases are ostensibly a p ...
Full textLink to itemCite
Journal ArticleAm J Pathol · September 2022
The tumor microenvironment (TME) plays an important role in the progression of head and neck squamous cell carcinoma (HNSCC). Currently, pathologic assessment of TME is nonstandardized and subject to observer bias. Genome-wide transcriptomic approaches to ...
Full textLink to itemCite
Journal ArticleToxicol Pathol · July 2022
Humans and nonhuman primates (NHPs) share numerous anatomical and physiological characteristics, thereby explaining the importance of NHPs as essential animal models for translational medicine and nonclinical toxicity testing. Researchers, toxicologic path ...
Full textLink to itemCite
Journal ArticleToxicol Appl Pharmacol · June 1, 2022
Carbon tetrafluoride (CF4) is an inert gas with higher molecular weight and lower water solubility than commonly used hyperbaric breathing gases. These inert gas properties decrease time required to decompress and avoid decompression sickness after deep di ...
Full textLink to itemCite
Journal ArticleDev Cell · February 7, 2022
Oncogenic Kras induces a hyper-proliferative state that permits cells to progress to neoplasms in diverse epithelial tissues. Depending on the cell of origin, this also involves lineage transformation. Although a multitude of downstream factors have been i ...
Full textOpen AccessLink to itemCite
Journal ArticleMol Ther · February 2, 2022
Nucleic acid (NA)-containing damage- and pathogen-associated molecular patterns (DAMPs and PAMPs, respectively) are implicated in numerous pathological conditions from infectious diseases to autoimmune disorders. Nucleic acid-binding polymers, including po ...
Full textLink to itemCite
Chapter · February 2, 2022
This chapter reviews the mouse kidney and lower urinary tract as models for human diseases. Many mouse strains develop spontaneous strain-specific lesions, which can be confused with outcomes or complications of particular experiments. Inspection of pathol ...
Full textCite
Journal ArticleCan J Cardiol · February 2022
Machine learning has seen slow but steady uptake in diagnostic pathology over the past decade to assess digital whole-slide images. Machine learning tools have incredible potential to standardise, and likely even improve, histopathologic diagnoses, but the ...
Full textLink to itemCite
Journal ArticleAm J Respir Cell Mol Biol · February 2022
Advancements in methods, technology, and our understanding of the pathobiology of lung injury have created the need to update the definition of experimental acute lung injury (ALI). We queried 50 participants with expertise in ALI and acute respiratory dis ...
Full textLink to itemCite
Journal ArticleEvol Med Public Health · 2022
BACKGROUND AND OBJECTIVES: Hepatocellular carcinoma occurs frequently in prosimians, but the cause of these liver cancers in this group is unknown. Characterizing the genetic changes associated with hepatocellular carcinoma in prosimians may point to possi ...
Full textLink to itemCite
Journal ArticleILAR J · December 31, 2021
There is no prescribed stage or standardized point at which an animal model protocol is reviewed for reproducibility and translatability. The method of review for a reproducible and translatable study is not consistently documented in peer literature, and ...
Full textLink to itemCite
Journal ArticleWound Repair Regen · November 2021
Dermal scarring from motor vehicle accidents, severe burns, military blasts, etc. is a major problem affecting over 80 million people worldwide annually, many of whom suffer from debilitating hypertrophic scar contractures. These stiff, shrunken scars limi ...
Full textLink to itemCite
Journal ArticleSci Rep · October 19, 2021
Ethanol provides a rapid, low-cost ablative solution for liver tumors with a small technological footprint but suffers from uncontrolled diffusion in target tissue, limiting treatment precision and accuracy. Incorporating the gel-forming polymer ethyl cell ...
Full textLink to itemCite
Journal ArticleMol Cancer Res · October 2021
HER2-positive breast cancers are among the most heterogeneous breast cancer subtypes. The early amplification of HER2 and its known oncogenic isoforms provide a plausible mechanism in which distinct programs of tumor heterogeneity could be traced to the in ...
Full textLink to itemCite
Journal ArticleSci Rep · August 19, 2021
In low-income countries, up to 80% of women diagnosed with cervical dysplasia do not return for follow-up care, primarily due to treatment being inaccessible. Here, we describe development of a low-cost, portable treatment suitable for such settings. It is ...
Full textLink to itemCite
Journal ArticlePLoS Pathog · July 2021
Salmonella hijack host machinery in order to invade cells and establish infection. While considerable work has described the role of host proteins in invasion, much less is known regarding how natural variation in these invasion-associated host proteins af ...
Full textLink to itemCite
Journal ArticleRadiol Imaging Cancer · May 2021
Purpose To establish a platform for quantitative tissue-based interpretation of cytoarchitecture features from tumor MRI measurements. Materials and Methods In a pilot preclinical study, multicontrast in vivo MRI of murine soft-tissue sarcomas in 10 mice, ...
Full textOpen AccessLink to itemCite
Journal ArticlePLoS One · 2021
Focal tumor ablation with ethanol could provide benefits in low-resource settings because of its low overall cost, minimal imaging technology requirements, and acceptable clinical outcomes. Unfortunately, ethanol ablation is not commonly utilized because o ...
Full textLink to itemCite
Journal Article · 2021
Many biologics have a short plasma half-life, and their conjugation to polyethylene glycol (PEG) is commonly used to solve this problem. Unfortunately, PEG is immunogenic and forms vacuoles, and improvement in PEGylated drugs' half-life is at an asymptote. ...
Full textCite
Journal ArticleJ Toxicol Pathol · 2021
The INHAND (International Harmonization of Nomenclature and Diagnostic Criteria for Lesions Project (www.toxpath.org/inhand.asp) is a joint initiative of the Societies of Toxicologic Pathology from Europe (ESTP), Great Britain (BSTP), Japan (JSTP) and Nort ...
Full textLink to itemCite
Journal Article · 2021
Despite multiple possible oncogenic mutations in the proto-oncogene KRAS , unique subsets of these mutations are detected in different cancer types. As KRAS mutations occur early, if not being initiating, these mutational biases are ostensibly a product of ...
Full textCite
Chapter · January 1, 2021
Numerous genetic, microbial, environmental, and experimental factors work together to influence the development of lesions studied by the toxicologic pathologist. The pathologist needs to understand how factors associated with the laboratory animal test su ...
Full textCite
Journal ArticleCancers (Basel) · November 11, 2020
BACKGROUND: Osteosarcoma is a rare but aggressive bone cancer that occurs primarily in children. Like other rare cancers, treatment advances for osteosarcoma have stagnated, with little improvement in survival for the past several decades. Developing new t ...
Full textLink to itemCite
Journal ArticleJ Extra Corpor Technol · September 2020
Venoarterial extracorporeal membrane oxygenation (VA-ECMO) is used to support patients with reversible cardiopulmonary insufficiency. Although it is a lifesaving technology, bleeding, inflammation, and thrombosis are well-described complications of ECMO. A ...
Full textLink to itemCite
ConferenceCancer Research · August 15, 2020
AbstractIn low-resource settings, surgery or radiation are inaccessible to 90% of cancer patients due to inadequate infrastructure and lack of trained personnel. Resource appropriate technologies must be dev ...
Full textCite
Journal ArticleActa Biomater · July 15, 2020
Cardiac implantable electronic device (CIED) infections acquired during or after surgical procedures are a major complication that are challenging to treat therapeutically, resulting in chronic and sometimes fatal infections. Localized delivery of antibiot ...
Full textLink to itemCite
Journal ArticleMol Ther Methods Clin Dev · June 12, 2020
Pompe disease is caused by the deficiency of lysosomal acid α-glucosidase (GAA). It is expected that gene therapy to replace GAA with adeno-associated virus (AAV) vectors will be less effective early in life because of the rapid loss of vector genomes. AAV ...
Full textOpen AccessLink to itemCite
Journal ArticleClin Cancer Res · March 1, 2020
PURPOSE: Although pituitary adenoma is classified as benign, Cushing disease is associated with significant morbidity due to the numerous sequelae of elevated cortisol levels. Successful therapy for Cushing disease remains elusive due to high rates of trea ...
Full textLink to itemCite
Journal ArticleOtolaryngol Head Neck Surg · March 2020
To describe proof of concept and pilot data for a cryotherapy application in the subglottis in a rabbit airway model. Four New Zealand white rabbits (3 experimental, 1 control) underwent general anesthesia and laryngoscopy and bronchoscopy. Experimental an ...
Full textLink to itemCite
Journal ArticleJ Med Device · December 1, 2019
One opportunity to reduce hernia occurrence and recurrence rates (currently estimated to be 30% at 10 years postoperatively) is by enhancing the ability of hernia meshes to anchor into tissue to prevent mesh migration, mesh contraction, and mesh tearing aw ...
Full textLink to itemCite
Journal ArticleHum Gene Ther · July 2019
Gene therapy for Pompe disease with adeno-associated virus (AAV) vectors has advanced into early phase clinical trials; however, the paucity of cation-independent mannose-6-phosphate receptor (CI-MPR) in skeletal muscle, where it is needed to take up acid ...
Full textLink to itemCite
Journal ArticleNat Med · March 2019
In the version of this article originally published, the figure callout in this sentence was incorrect: "Furthermore, in S1P1-KI mice themselves, whereas PD-1 blockade was ineffectual as monotherapy, the effects of 4-1BB agonism and checkpoint blockade pro ...
Full textLink to itemCite
Journal ArticleElife · December 13, 2018
Inflammation often induces regeneration to repair the tissue damage. However, chronic inflammation can transform temporary hyperplasia into a fertile ground for tumorigenesis. Here, we demonstrate that the microRNA miR-34a acts as a central safeguard to pr ...
Full textLink to itemCite
Journal ArticleILAR J · December 1, 2018
In translational research, animal models are an important tool to aid in decision-making when taking potential therapies into human clinical trials. Recently, there have been a number of papers that have suggested limited concordance of preclinical animal ...
Full textLink to itemCite
Journal ArticleILAR J · December 1, 2018
This issue of ILAR Journal focusses on pathology and pathologists in biomedical research, more specifically in preclinical translational research involving (nonhuman) animals, emphasizing academic settings. Considerations in study design and planning to ma ...
Full textLink to itemCite
ConferenceJ Inherit Metab Dis · November 2018
BACKGROUND: Glycogen storage disease type Ia (GSD Ia) in dogs closely resembles human GSD Ia. Untreated patients with GSD Ia develop complications associated with glucose-6-phosphatase (G6Pase) deficiency. Survival of human patients on intensive nutritiona ...
Full textLink to itemCite
Journal ArticleNat Med · September 2018
T cell dysfunction contributes to tumor immune escape in patients with cancer and is particularly severe amidst glioblastoma (GBM). Among other defects, T cell lymphopenia is characteristic, yet often attributed to treatment. We reveal that even treatment- ...
Full textLink to itemCite
Journal ArticleSci Rep · May 25, 2018
The unfolded protein response (UPR) pathway, consisting of the evolutionarily conserved Ire1 kinase/endonuclease and the bZIP transcription factor Hxl1, is critical for the pathogenicity of Cryptococcus neoformans; however, its role remains unknown in othe ...
Full textLink to itemCite
Chapter · January 1, 2018
Toxicologists involved in toxicity testing must be aware of the important aspects of how animals are cared for and used in the laboratory. They also need to have an understanding of how the laboratory animal itself and the animal care and use environment a ...
Full textCite
Chapter · January 1, 2018
The common marmoset (Callithrix jacchus) is an important nonhuman primate (NHP) model that has been used in both chemical toxicity and pharmaceutical safety assessment testing. These NHPs have a number of features that can make them a useful model for toxi ...
Full textCite
Chapter · January 1, 2018
Toxicologists involved in toxicity testing must be aware of the important aspects of how animals are cared for and used in the laboratory. They also need to have an understanding of how the laboratory animal itself and the animal care and use environment a ...
Full textCite
Journal ArticleCancer Res · December 15, 2017
There remain gaps in knowledge concerning how vascular morphology evolves during carcinogenesis. In this study, we imaged neovascularization by label-free dark-field microscopy of a 7,12-Dimethylbenz[a]anthracene (DMBA)-induced hamster cheek pouch model of ...
Full textLink to itemCite
Journal ArticleILAR J · July 1, 2017
Institutional Animal Care and Use Committees (IACUCs) have a mandated role under the Animal Welfare Act and under Public Health Service Policy to assure the ethical and humane use of research animals in experiments conducted in the United States. The IACUC ...
Full textLink to itemCite
Journal ArticleNat Med · February 2017
Prader-Willi syndrome (PWS) is an imprinting disorder caused by a deficiency of paternally expressed gene(s) in the 15q11-q13 chromosomal region. The regulation of imprinted gene expression in this region is coordinated by an imprinting center (PWS-IC). In ...
Full textLink to itemCite
Journal ArticleJ Immunol · December 15, 2016
The HIV-1 envelope protein (Env) has evolved to subvert the host immune system, hindering viral control by the host. The tryptophan metabolic enzyme kynureninase (KYNU) is mimicked by a portion of the HIV Env gp41 membrane proximal region (MPER) and is cro ...
Full textLink to itemCite
Journal ArticleLab Anim · June 2016
International regulations and guidelines strongly suggest that the use of animal models in scientific research should be initiated only after the authority responsible for the review of animal studies has concluded a well-thought-out harm-benefit analysis ...
Full textLink to itemCite
Journal ArticleLab Anim · June 2016
International regulations and guidelines strongly suggest that the use of animal models in scientific research should be initiated only after the authority responsible for the review of animal studies has concluded a well-thought-out harm-benefit analysis ...
Full textLink to itemCite
Journal ArticleJ Pathol · January 2016
Featured Publication
Animal models are essential research tools in modern biomedical research, but there are concerns about their lack of reproducibility and the failure of animal data to translate into advances in human medical therapy. A major factor in improving experimenta ...
Full textLink to itemCite
Journal ArticleJ Med Microbiol · September 2015
Purpose-bred common marmosets from domestic sources housed in a US research facility, and used in multiple drug discovery programmes, were noted to have a high incidence of spontaneous inflammatory bowel disease and sporadic cholecystitis and cholangiohepa ...
Full textLink to itemCite
Journal ArticleToxicol Pathol · January 2015
Animal models have provided an important tool to help make the decision to take potential therapies from preclinical studies to humans. In the past several years, the strong reliance of the pharmaceutical discovery and development process on the use of ani ...
Full textLink to itemCite
Book · January 1, 2014
Widespread exposure to cobalt metal dust occurs occupationally through the production of alloys, in the manufacture of cobalt salts, and in nuclear technology. It is an effective catalyst for many organic reactions, particularly in hydrotreating catalysts, ...
Cite
Chapter · August 29, 2013
Numerous genetic, microbial, environmental, and experimental factors work together to influence development of the lesions studied by the toxicologic pathologist. The pathologist needs to understand how factors associated with the laboratory animal, the an ...
Full textCite
Journal ArticleLab Anim · July 2013
Replacement, Reduction and Refinement, the ‘Three Rs’ of Russell & Burch, are accepted worldwide as fundamental to the ethics of animal experimentation. The production, care and use of genetically-altered animals can pose particular challenges to the imple ...
Full textLink to itemCite
Journal ArticleVet Pathol · May 2013
Urinary system toxicity is a significant concern to pathologists in the hazard identification, drug and chemical safety evaluation, and diagnostic service industries worldwide. There are myriad known human and animal urinary system toxicants, and investiga ...
Full textLink to itemCite
Chapter · January 1, 2013
Numerous genetic, microbial, environmental, and experimental factors work together to influence development of the lesions studied by the toxicologic pathologist. The pathologist needs to understand how factors associated with the laboratory animal, the an ...
Full textCite
Journal ArticleMol Cancer Res · April 2012
Environmental exposures during sensitive windows of development can reprogram normal physiologic responses and alter disease susceptibility later in life in a process known as developmental reprogramming. For example, exposure to the xenoestrogen diethylst ...
Full textLink to itemCite
Journal ArticleJ Toxicol Environ Health B Crit Rev · 2011
Exposure to asbestos fibers is associated with non-neoplastic pleural diseases including plaques, fibrosis, and benign effusions, as well as with diffuse malignant pleural mesothelioma. Translocation and retention of fibers are fundamental processes in und ...
Full textLink to itemCite
Chapter · August 12, 2010
Toxicologists involved in toxicity testing must be aware of the important aspects of how animals are cared for and used in the laboratory. They also need to have an understanding of how the laboratory animal itself and the animal care and use environment a ...
Full textCite
Journal ArticleBr J Cancer · May 25, 2010
Animal experiments remain essential to understand the fundamental mechanisms underpinning malignancy and to discover improved methods to prevent, diagnose and treat cancer. Excellent standards of animal care are fully consistent with the conduct of high qu ...
Full textLink to itemCite
Journal ArticleExp Lung Res · December 2009
The mechanism(s) by which chronic inhalation of indium phosphide (InP) particles causes pleural fibrosis is not known. Few studies of InP pleural toxicity have been conducted because of the challenges in conducting particulate inhalation exposures, and bec ...
Full textLink to itemCite
Journal ArticleNat Nanotechnol · November 2009
Carbon nanotubes are shaped like fibres and can stimulate inflammation at the surface of the peritoneum when injected into the abdominal cavity of mice, raising concerns that inhaled nanotubes may cause pleural fibrosis and/or mesothelioma. Here, we show t ...
Full textLink to itemCite
Journal ArticleToxicol Pathol · June 2007
Although occurring in aged laboratory rodents, spontaneous renal tumour are unknown in animals younger than 18 weeks. A survey on renal preneoplastic and neoplastic lesions has been performed on Sprague-Dawley rats from general toxicology studies over the ...
Full textLink to itemCite
Journal ArticleClin Cancer Res · May 15, 2007
PURPOSE: Transforming growth factor beta (TGF-beta), which generally stimulates the growth of mesenchymally derived cells but inhibits the growth of epithelial cells, has been proposed as a possible target for cancer therapy. However, concerns have been ra ...
Full textLink to itemCite
Book · January 1, 2007
Wy-14,643 was selected for inclusion in a series of studies on peroxisome proliferators because it is known to produce considerable peroxisome proliferation and hepatocarcinogenicity in rats. Male Sprague-Dawley rats were exposed to Wy-14,643 (greater than ...
Cite
Chapter · December 1, 2006
Neoplastic disease in the rat, as in most species, increases dramatically with increasing age. Many genetic and environmental factors influence the development of neoplasia, and attaining an understanding of these factors and their control is critical for ...
Full textCite
Chapter · December 1, 2006
Recommendations for animal euthanasia are provided by the American Veterinary Medical Association (AVMA) Panel on Euthanasia. Physical, inhalant, and pharmacologic methods of euthanasia all have their place in research studies that employ laboratory rats. ...
Full textCite
Journal ArticleToxicology · July 5, 2006
Trichloroethene (TCE) is classified as a potential human carcinogen although there is a significant debate regarding the mechanism of TCE induced renal tumor formation. This controversy stems in part from the extremely high doses of TCE required to induce ...
Full textLink to itemCite
Journal ArticleILAR J · 2006
Preparation of animals is important for optimization of animal welfare as well as to minimize interanimal variation, thereby strengthening the quality of data for in vivo studies. These issues are important in the work of institutional animal care and use ...
Full textLink to itemCite
Journal ArticleCarcinogenesis · December 2005
To determine the effects of expression of mutant Ki-ras on lung tumorigenesis, we developed a bitransgenic mouse model that expresses the human Ki-ras(G12C) allele in alveolar type II and/or Clara cells in a tetracycline-inducible, lung-specific manner. Ex ...
Full textLink to itemCite
Chapter · January 1, 2005
Recommendations for animal euthanasia are provided by the American Veterinary Medical Association (AVMA) Panel on Euthanasia. Physical, inhalant, and pharmacologic methods of euthanasia all have their place in research studies that employ laboratory rats. ...
Full textCite
Chapter · January 1, 2005
Neoplastic disease in the rat, as in most species, increases dramatically with increasing age. Many genetic and environmental factors influence the development of neoplasia, and attaining an understanding of these factors and their control is critical for ...
Full textCite
Journal ArticleJ Biol Chem · October 29, 2004
The obesity epidemic in industrialized countries is associated with increases in cardiovascular disease (CVD) and certain types of cancer. In animal models, caloric restriction (CR) suppresses these diseases as well as chemical-induced tissue damage. These ...
Full textLink to itemCite
Journal ArticleToxicol Sci · August 2004
2,3,5-tris-(glutathion-S-yl)-hydroquinone (TGHQ), a metabolite of hydroquinone (HQ), generates reactive oxygen species (ROS) in cultured renal epithelial cells and binds to tissue macromolecules within the rat kidney. The potential mechanisms by which TGHQ ...
Full textLink to itemCite
Journal ArticleEnviron Health Perspect · June 2004
Preexistent cardiopulmonary disease in humans appears to enhance susceptibility to the adverse effects of ambient particulate matter. Previous studies in this laboratory have demonstrated enhanced inflammation and mortality after intratracheal instillation ...
Full textLink to itemCite
Journal ArticleInhal Toxicol · June 2004
Growing evidence suggests that nasal deposition and transport along the olfactory nerve represents a route by which inhaled manganese and certain other metals are delivered to the rodent brain. The toxicological significance of olfactory transport of manga ...
Full textLink to itemCite
Journal ArticleCarcinogenesis · March 2004
The von Hippel-Lindau (VHL) tumor suppressor gene plays a prominent role in the development of renal cell carcinoma (RCC) in humans. VHL functions as a ubiquitin E3 ligase, controlling the stability of hypoxia inducible factor (HIF) and tumor angiogenesis. ...
Full textLink to itemCite
Journal ArticleToxicol Sci · February 2004
A multispecies, subchronic, inhalation study comparing pulmonary responses to ultrafine titanium dioxide (uf-TiO(2)) was performed. Female rats, mice, and hamsters were exposed to aerosol concentrations of 0.5, 2.0, or 10 mg/m(3) uf-TiO(2) particles for 6 ...
Full textLink to itemCite
Journal ArticleExp Lung Res · 2004
Osteopontin (OPN) is a secreted cytokine with cell adhesive and chemoattractive functions whose expression is induced by a variety of environmental toxicants. It has been implicated in the pathogenesis of several pulmonary granulomatous and fibrotic condit ...
Full textLink to itemCite
Journal ArticleILAR J · 2004
The use of rodent models for research and testing on endocrine-active compounds necessitates an awareness of a number of laboratory animal science issues to standardize bioassay methods and facilitate reproducibility of results between laboratories. These ...
Full textLink to itemCite
Journal ArticleEnvironmental Health Perspectives · January 1, 2004
Preexistent cardiopulmonary disease in humans appears to enhance susceptibility to the adverse effects of ambient particulate matter. Previous studies in this laboratory have demonstrated enhanced inflammation and mortality after intratracheal instillation ...
Full textCite
Journal ArticleGenes Chromosomes Cancer · December 2003
Eker rats carry a defect in the Tsc-2 tumor suppressor gene and female Eker rats develop uterine leiomyoma with a high frequency. The presentation, response to hormones and molecular alterations in these mesenchymal smooth muscle tumors, closely resembles ...
Full textLink to itemCite
Journal ArticleToxicol Sci · October 2003
Benzene, a carcinogen that induces chromosomal breaks, is strongly associated with leukemias in humans. Possible genetic determinants of benzene susceptibility include proteins involved in repair of benzene-induced DNA damage. The catalytic subunit of DNA- ...
Full textLink to itemCite
Journal ArticleExp Lung Res · July 2003
Pleural inflammation is a sequela of exposure to toxic mineral fibers such as amosite asbestos. This inflammatory response involves the influx of leukocytes from the vasculature into the pleural space. Adhesion molecules such as intercellular adhesion mole ...
Full textLink to itemCite
Journal ArticleToxicol Sci · July 2003
Interspecies differences in pulmonary and pleural responses to the inhalation of natural mineral and synthetic vitreous fibers have been observed in chronic and subchronic studies. However, the reasons for these differences are not clearly understood. Ther ...
Full textLink to itemCite
Journal ArticleToxicol Sci · April 2003
Exposure to particulate matter (PM) may exacerbate preexisting respiratory diseases such as asthma, chronic obstructive pulmonary disease (COPD), bronchitis, and pneumonia. However, few experimental studies have addressed the effects of PM on lower respira ...
Full textLink to itemCite
Journal ArticleToxicol Sci · April 2003
Enzymes involved in benzene metabolism are likely genetic determinants of benzene-induced toxicity. Polymorphisms in human microsomal epoxide hydrolase (mEH) are associated with an increased risk of developing leukemia, specifically those associated with b ...
Full textLink to itemCite
Journal ArticleToxicol Sci · April 2003
Epidemiological studies have indicated that exposure to elevated levels of particulate matter exacerbates several pulmonary diseases, including asthma, bronchitis, and viral infections. Respiratory syncytial virus (RSV) is the major cause of bronchiolitis ...
Full textLink to itemCite
Journal ArticleCancer Res · March 1, 2003
Enzymes that activate and detoxify benzene are likely genetic determinants of benzene-induced toxicity.NAD(P)H: quinone oxidoreductase-1 (NQO1) detoxifies benzoquinones, proposed toxic metabolites of benzene. NQO1 deficiency in humans is associated with an ...
Link to itemCite
Journal ArticleAm J Pathol · February 2003
Somatic loss of function of the tuberous sclerosis 2 (TSC2) tumor suppressor gene leads to the development of benign and malignant lesions of the kidney, brain, uterus, spleen, and liver and germline loss of function of this tumor suppressor gene is embryo ...
Full textLink to itemCite
Journal ArticleToxicol Sci · November 2002
Female mice, rats, and hamsters were exposed to 10, 50, or 250 mg/m(3) pigmentary titanium dioxide (p-TiO(2)) particles for 6 h per day and 5 days per week for 13 weeks with recovery groups held for an additional 4, 13, 26, or 52 weeks postexposure (46 wee ...
Full textLink to itemCite
Journal ArticleAm J Physiol Renal Physiol · August 2002
Although 2,3,5-tris-(glutathion-S-yl)hydroquinone (TGHQ; 2.5 micromol/kg ip) markedly increased cell proliferation within the outer stripe of the outer medulla (OSOM) of the kidney in both wild-type (Tsc2(+/+)) and mutant Eker rats (Tsc2(EK/+)), only TGHQ- ...
Full textLink to itemCite
Journal ArticleToxicol Sci · April 2002
Chloroform is a nongenotoxic-cytotoxic carcinogen in rodent liver and kidney, including the female B6C3F1 mouse liver. Because tumors are secondary to events associated with cytolethality and regenerative cell proliferation, these end points are valid surr ...
Full textLink to itemCite
Journal ArticleToxicol Sci · March 2002
Humans and wildlife are frequently exposed to mixtures of endocrine active-compounds (EAC). The objective of the present study was to investigate the potential of the phytoestrogen genistein to influence the reproductive developmental toxicity of the endoc ...
Full textLink to itemCite
Journal ArticleInhal Toxicol · March 2002
Two new glasswools were developed for optimal biosolubility in the lung: JM 902, for insulation and filtration; and JM 901F, for standard thermal and acoustical insulation. Both were tested for lung biopersistence and their potential to induce persistent p ...
Full textLink to itemCite
Journal ArticleToxicol Pathol · 2002
Chronic progressive nephropathy (CPN) is the most frequently diagnosed lesion in the rat kidney. It has many components including degeneration and regeneration of renal tubule (RT) epithelium, glomerular lesions and interstitial inflammation and fibrosis. ...
Full textLink to itemCite
ConferenceAnnals of Occupational Hygiene · January 1, 2002
Groups of female rats, mice and hamsters were exposed to 10, 50 or 250 mg/m 3 pigment grade titanium dioxide (PG-TiO 2) or to 0.5, 2 or 10 mg/m 3 ultrafine titanium dioxide (UF-TiO 2) for 6 h/day, 5 days/week for 13 weeks. At the end of the exposure period ...
Full textCite
Book · January 1, 2002
o-Nitrotoluene is used to synthesize agricultural and rubber chemicals, azo and sulfur dyes, and dyes for cotton, wool, silk, leather, and paper. o-Nitrotoluene was nominated for study by NIOSH and the NTP based on its considerable human exposure as well a ...
Cite
Journal ArticleToxicol Sci · December 2001
Bromodichloromethane (BDCM) is a common municipal drinking water disinfection by-product, resulting in widespread trace human exposure via ingestion and inhalation. The present studies were designed to define organ-specific, BDCM-induced toxicity in wild t ...
Full textLink to itemCite
Journal ArticleComp Med · October 2001
There has been increasing interest in the use of selected genetically modified (GM) mouse models for the testing of chemicals to determine their carcinogenic potential. GM mouse models are believed to be useful tools that offer mechanistically relevant ins ...
Link to itemCite
Journal ArticleEnviron Health Perspect · June 2001
Epidemiologic reports by C.A. Pope III et. al. demonstrated that in the Utah Valley, closure of an open-hearth steel mill over the winter of 1987 was associated with reductions in respiratory disease and related hospital admissions in valley residents. To ...
Full textLink to itemCite
Journal ArticleToxicol Sci · May 2001
tert-Butyl alcohol (TBA) has been shown to cause kidney tumors in male rats following chronic administration in drinking water. The objective of the present study was to determine whether TBA induces alpha 2u-globulin (alpha 2u) nephropathy (alpha 2u-N) an ...
Full textLink to itemCite
Journal ArticleMol Cell · April 2001
The PKD1 gene accounts for 85% of autosomal dominant polycystic kidney disease (ADPKD), the most common human genetic disorder. Rats with a germline inactivation of one allele of the Tsc2 tumor suppressor gene developed early onset severe bilateral polycys ...
Full textLink to itemCite
Journal ArticleChem Res Toxicol · January 2001
Hydroquinone (HQ) is a potential human carcinogen to which many people are exposed. HQ generally tests negative in standard mutagenicity assays, making it a "nongenotoxic" carcinogen whose mechanism of action remains unknown. HQ is metabolized to 2,3,5-tri ...
Full textLink to itemCite
Journal ArticleEnvironmental Health Perspectives · January 1, 2001
Epidemiologic reports by C.A. Pope III et al. demonstrated that in the Utah Valley, closure of an open-hearth steel mill over the winter of 1987 was associated with reductions in respiratory disease and related hospital admissions in valley residents. To b ...
Full textCite
Journal ArticleToxicological Sciences · January 1, 2001
tert-Butyl alcohol (TBA) has been shown to cause kidney tumors in male rats following chronic administration in drinking water. The objective of the present study was to determine whether TBA induces α2u-globulin (α2u) nephropathy (α2u-N) and enhanced rena ...
Cite
Journal ArticleEnviron Health Perspect · October 2000
Uterine leiomyomas (fibroids, myomas) are the most common tumors occurring in the genital tract of women over 30 years of age. These benign uterine smooth-muscle tumors are estimated to be clinically significant in at least 25% of the American female popul ...
Full textLink to itemCite
Journal ArticleCarcinogenesis · August 2000
Induced cell proliferation is important in the mode of action of many non-genotoxic renal carcinogens. Since Tsc2 mutant (Eker) rats are genetically predisposed to the development of renal cell tumors, they provide a useful animal model in which to study t ...
Link to itemCite
Journal ArticleEnvironmental Health Perspectives · 2000
Uterine leiomyomas (fibroids, myomas) are the most common tumors occurring in the genital tract of women over 30 years of age. These benign uterine smooth-muscle tumors are estimated to be clinically significant in at least 25% of the American female popul ...
Cite
Journal ArticleJ Soc Gynecol Investig · 2000
OBJECTIVE: Uterine leiomyoma are the most common gynecologic neoplasm and a primary cause of hysterectomy in premenopausal women. Preclinical studies were conducted in the Eker rat model to investigate the potential efficacy of selective estrogen receptor ...
Link to itemCite
Journal ArticleInhal Toxicol · January 2000
Elevation of protein carbonyls has been implicated in the clinical setting as a result of oxidant damage associated with a number of disease states in both humans and laboratory animals. Protein carbonyls, the product of oxidative modification of amino aci ...
Full textLink to itemCite
Journal ArticleInhal Toxicol · January 2000
We present a preliminary report of a bioassay designed to compare and contrast selected pulmonary responses of female B6C3F1 mice, Fischer 344 rats, and Syrian golden hamsters to inhaled pigmentary titanium dioxide (TiO2). Animals were administered 10, 50, ...
Full textLink to itemCite
Journal ArticleCancer Lett · December 1, 1999
The development of human malignant mesothelioma (MM) is strongly associated with occupational or environmental exposure to certain natural mineral fibers, although the genetic mechanisms underlying this malignancy remain unclear. Although the p53 gene is f ...
Full textLink to itemCite
Journal ArticleToxicol Appl Pharmacol · October 15, 1999
Chloroform is a nongenotoxic-cytotoxic liver and kidney carcinogen and nasal toxicant in some strains and sexes of rodents. Substantial evidence indicates that tumor induction is secondary to events associated with cytolethality and regenerative cell proli ...
Full textLink to itemCite
Journal ArticleInhal Toxicol · September 1999
Fiberglass (FG) is the largest category of man-made mineral fibers (MMVFs). Many types of FG are manufactured for specific uses building insulation, air handling, filtration, and sound absorption. In the United States, > 95% of FG produced is for building ...
Full textLink to itemCite
Journal ArticleInhal Toxicol · September 1999
A multidose, subchronic inhalation study was used to estimate the maximum tolerated dose (MTD) of 901 fiberglass (MMVF10.1) for a chronic inhalation study using hamsters. Subchronic study results indicated that 30 mg/m(3) [250-300 WHO fibers (>5 microm lon ...
Full textLink to itemCite
Journal ArticleToxicol Sci · May 1999
The present study was designed to determine whether pleural fiber burdens or subchronic pleural fibroproliferative and inflammatory changes can help explain the marked interspecies differences in pleural fibrosis and mesothelioma that are observed followin ...
Full textLink to itemCite
Book · January 1, 1999
Electric and magnetic fields are associated with the production, transmission, and use of electricity; thus, the potential for human exposure is high. These electric and magnetic fields are predominantly of low frequency (60 Hz in the United States and 50 ...
Cite
Journal ArticleNTP Technical Report on the Toxicology and Carcinogenesis Studies Series · January 1, 1999
Furfuryl alcohol-based resins are used as binding agents in foundry sand and as corrosion inhibitors in mortar, grout, and cement. Because of their heat resistance, furan resins are used in the manufacture of fiberglass-reinforced plastic equipment. Furfur ...
Cite
Journal ArticleCarcinogenesis · November 1998
Hormonal influences are known to affect the development of renal cell carcinoma in man and laboratory animal models. We tested the hypothesis that estrogen treatment or ovariectomy of rats modulates renal tumor development using tuberous sclerosis 2 (Tsc2) ...
Full textLink to itemCite
Journal ArticleCell Growth Differ · May 1998
Tumor promotion/progression is known to be due in part to increased signaling through a variety of mitogenic pathways, including protein kinase C (PKC). To determine whether increased PKC activity could play a role in promotion and progression of renal can ...
Link to itemCite
Journal ArticleEnviron Mol Mutagen · 1998
The weight of evidence indicates that chloroform induces cancer in the female B6C3F1 mouse liver via a nongenotoxic-cytotoxic mode of action. However, it is probable that DNA damage occurs secondary to events associated with cytolethality and regenerative ...
Full textLink to itemCite
Journal ArticleEnviron Health Perspect · September 1997
In the present subchronic study, we compared pleural inflammation, visceral pleural collagen deposition, and visceral and parietal pleural mesothelial cell proliferation in rats and hamsters identically exposed to a kaolin-based refractory ceramic fiber, ( ...
Full textLink to itemCite
Journal ArticleEnviron Health Perspect · September 1997
The effects of chronic inhalation of glass fibers and amosite asbestos are currently under study in hamsters. The study includes 18 months of inhalation exposure followed by lifetime recovery. Syrian golden hamsters are exposed, nose only, for 6 hr/day, 5 ...
Full textLink to itemCite
Journal ArticleLab Anim Sci · August 1997
Rodent nose-only inhalation toxicology systems comprise whole-body immobilization in plastic restraint tubes. This method of restraint is known to have a variety of effects on animals. In the studies reported here, two independent toxicology laboratories e ...
Link to itemCite
Journal ArticleMol Carcinog · July 1997
Transforming growth factor-alpha (TGF-alpha) is a multifunctional cell regulatory protein with a wide range of effects on cell growth and differentiation and has been implicated in the neoplastic transformation of a variety of cell types. Altered expressio ...
Link to itemCite
Journal ArticleRes Rep Health Eff Inst · June 1997
The 1990 Clean Air Act Amendments contain mandates for reduced automotive emissions and add new requirements for the use of alternative fuels such as methanol to reduce certain automotive pollutants. Methanol is acutely toxic in humans at relatively low do ...
Link to itemCite
Journal ArticleExp Lung Res · 1997
The alveolar epithelium contains tight junctions and provides a barrier to passage of potentially injurious substances into the pulmonary interstitium. Alveolar epithelial injury is hypothesized to be an important early event in the pathogenesis of asbesto ...
Full textLink to itemCite
Journal ArticleFundam Appl Toxicol · July 1996
Short-term toxicity and lung clearance were assessed in rats exposed by inhalation to size-selected fibrous glass (FG) for 13 weeks. Results from this study and from a recent FG chronic inhalation study are presented here as guidelines for the selection of ...
Full textLink to itemCite
Journal ArticleFundam Appl Toxicol · March 1996
The pleura is an important target tissue of fiber-induced disease, although it is not known whether fibers must be in direct contact with pleural cells to exert pathologic effects. In the present study, we determined the kinetics of fiber movement into ple ...
Full textLink to itemCite
Journal ArticleFundam Appl Toxicol · March 1996
The pleura is a target site for toxic effects induced by a variety of fibrous particulates, including both natural mineral and man-made vitreous fibers. We examined selected cytological and biochemical indicators of inflammation in both the pleural compart ...
Full textLink to itemCite
Journal ArticleMol Carcinog · February 1996
Germline alterations of the human von Hippel-Lindau (VHL) tumor suppressor gene predispose to renal cell carcinoma and a constellation of other tumor types found in VHL disease. This gene is also mutated or deleted in a high proportion of sporadic nonpapil ...
Full textLink to itemCite
Book · January 1, 1996
Nickel subsulfide is used in the manufacture of lidiium batteries and is a major component in the refining of certain nickel ores. Nickel subsulfide was nominated as part of a class study of nickel compounds, for which there was little information on the t ...
Cite
Book · January 1, 1996
Nickel sulfate hexahydrate is used in nickel plating, as a mordant in dyeing and printing textiles, as a blackening agent for zinc and brass, and in the manufacture of organic nickel salts. Nickel sulfate hexahydrate was nominated by the National Cancer In ...
Cite
Journal ArticleToxicol Lett · December 1995
A class of genes, the so-called tumor suppressor genes or anti-oncogenes, was originally identified as being responsible for germ-line transmission of cancer susceptibility in humans. Tumor suppressor genes are recessive at the cellular level with respect ...
Full textLink to itemCite
Journal ArticleEndocrinology · November 1995
Uterine leiomyomas (fibroids) are the most common gynecological neoplasms and may be associated with significant morbidity. Recently, we described a rat model (Eker rat) of fibroid development in which reproductive tract leiomyomas develop spontaneously wi ...
Full textLink to itemCite
Journal ArticleMol Carcinog · September 1995
Somatic events leading to the inactivation of tumor suppressor genes often involve chromosomal alterations that can be detected as loss of heterozygosity (LOH). In the Eker rat, spontaneous tumors of the kidney, uterus, and spleen develop as a result of a ...
Full textLink to itemCite
Journal ArticleCancer Res · August 15, 1995
Insulin-like growth factors (IGFs) are polypeptides that play an important role in cellular proliferation and differentiation. The present study examines the role of IGFs in the growth of mesothelial cells. Cell lines derived from normal rat mesothelium as ...
Link to itemCite
Journal ArticleVet Pathol · July 1995
Long-Evans (Eker) rats carry a mutation that predisposes them to develop spontaneous renal cell tumors of two morphologic patterns: solid chromophilic masses or cystic lesions lined by eosinophilic cells. Previous studies have suggested that these tumors a ...
Full textLink to itemCite
Journal ArticleAm J Pathol · June 1995
Mesenchymal tumors of the lower reproductive tract of women are poorly understood at the molecular level as a result in part of the lack of relevant animal models. The present study describes a novel model of gynecological smooth muscle tumors in which the ...
Link to itemCite
Journal ArticleAm J Pathol · June 1995
Uterine myometrial tumors are the most commonly found gynecological neoplasm in women. The underlying causes of uterine leiomyomata are poorly understood, a result in part of the absence of a good animal model system in which to study these tumors. This re ...
Link to itemCite
Journal ArticleMol Carcinog · April 1995
Rats carrying the Eker tumor-susceptibility mutation (Eker rats) are predisposed to developing renal cell carcinoma. Rats heterozygous for the Eker mutation develop spontaneous multiple bilateral renal cell tumors by the age of 1 yr. In a previous study, E ...
Full textLink to itemCite
Journal ArticleCancer Res · February 1, 1995
Although the association between asbestos exposure and mesothelioma development has been established for decades, very little is known regarding the molecular mechanism(s) by which asbestos fibers induce this disease. In this series of experiments, the pot ...
Link to itemCite
Book · January 1, 1995
Three thousand tons of cadmium are imported or produced annually in the United States, an d approximately 90% of this is cadmium oxide. Cadmium oxide is used in batteries, electroplatin g baths, pigments, plastics, synthetic products, and a variety of othe ...
Cite
Book · January 1, 1995
Dibutyl phthalate is a phthalate ester with extensive use in industry in such products as plastic (PVC) piping, various varnishes and lacquers, safety glass, nail polishes, paper coatings, dental materials, pharmaceuticals, and plastic food wrap. Concomita ...
Cite
Journal ArticleRegul Toxicol Pharmacol · December 1994
Inhalation of certain natural mineral fibers, such as amphibole asbestos, is associated with the development of inflammatory, fibroproliferative, and neoplastic diseases in the lung and pleura of man and experimental animals. The mechanisms by which fibers ...
Link to itemCite
ConferenceRegulatory Toxicology and Pharmacology · December 1, 1994
Inhalation of certain natural mineral fibers, such as amphibole asbestos, is associated with the development of inflammatory, fibroproliferative, and neoplastic diseases in the lung and pleura of man and experimental animals. The mechanisms by which fibers ...
Cite
Journal ArticleCarcinogenesis · October 1994
Rats carrying the Eker tumor susceptibility mutation are genetically predisposed to renal cell carcinoma. Rats heterozygous for the Eker mutation (Eker carriers) develop multiple bilateral renal cell carcinomas by the age of 1 year. Using an in vitro rat k ...
Full textLink to itemCite
Journal ArticleFundam Appl Toxicol · July 1994
Long-term inhalation exposure to a biopersistent man-made ceramic fiber (RCF 1) results in a high incidence of pleural mesotheliomas in Syrian golden hamsters but not in identically exposed rats. To understand better the mechanisms involved in the intraspe ...
Full textLink to itemCite
Journal ArticleCancer Res · June 15, 1994
Induction of mesothelioma in the rat is an important animal model for assessing the carcinogenic potential of fibers and for understanding the molecular basis underlying the development of these tumors. Mesotheliomas and nephroblastoma (Wilms' tumor) have ...
Link to itemCite
Journal ArticleFundam Appl Toxicol · April 1994
The potential carcinogenicity and toxicity of inhaled nitrobenzene were evaluated following chronic (2-year) exposure in mice and rats. Male and female B6C3F1 mice were exposed to 0, 5, 25, or 50 ppm nitrobenzene, while male and female F344 rats and male C ...
Full textLink to itemCite
Journal ArticleToxicol Pathol · 1994
Bilateral, multicentric renal tubule tumors were found in 4 rats at the termination of 3 separate 90-day toxicity studies during the safety evaluation of 3 unrelated chemicals. The 3 studies were conducted at 2 separate locations, but the rats used were ob ...
Full textLink to itemCite
Journal ArticleToxicol Pathol · 1994
The mesothelium is a target of the toxic and carcinogenic effects of certain natural mineral and man-made fibers. Long-term inhalation of a ceramic fiber (RCF-1) results in a high incidence of pleural mesotheliomas in Syrian golden hamsters but not in iden ...
Full textLink to itemCite
Journal ArticleFundam Appl Toxicol · May 1993
This study investigated benzene-induced neoplasia in CBA/Ca mice, with special emphasis on hematopoietic tissues. Ten-week-old male CBA/Ca mice were exposed to 300 ppm benzene via inhalation for 6 hr/day, 5 days/week, for 16 weeks and held 18 months after ...
Full textLink to itemCite
Journal ArticleMol Carcinog · 1993
To map tumor suppressor genes for lung adenocarcinomas, we introduced normal human chromosomes 3, 7, and 11 into the A549 tumor cell line by microcell-mediated chromosome transfer to test which chromosomes had the ability to suppress tumorigenicity. These ...
Full textLink to itemCite
ConferenceEuropean Respiratory Review · January 1, 1993
Human mesotheliomas aberrantly express platelet-derived growth factor (PDGF), suggesting an autocrine/paracrine role for this growth factor in the development of these tumours. Experiments to investigate the role of PDGF in the development of rat mesotheli ...
Cite
Journal ArticleNTP Technical Report on the Toxicity Studies Series · January 1, 1993
1,6-Hexanediamine (HDA) is an aliphatic amine that is produced in large volumes in the United States. HDA is widely used as a corrosion inhibitor in lubricants and as an intermediate in the industrial synthesis of paints, resins, inks, and textiles. Toxici ...
Cite
Journal ArticleJ Urol · December 1992
A rodent model of hereditary cancer in which a single gene mutation predisposes rats to bilateral multicentric renal cell carcinoma (RCC) is described. This rat hereditary cancer syndrome shares certain similarities with von Hippel-Lindau disease (VHLD). I ...
Full textLink to itemCite
Journal ArticleAm J Respir Cell Mol Biol · July 1992
The role of different antioxidant pathways in cultured rat pleural mesothelial cells was studied by exposing the cells to various hydrogen peroxide (H2O2) concentrations and by measuring H2O2 cell cytotoxicity and the capacity of the cells to scavenge H2O2 ...
Full textLink to itemCite
Journal ArticleScience · March 27, 1992
A single germ line gene mutation at a tumor susceptibility locus in a rodent model of hereditary human renal cancer caused a 70-fold increase in susceptibility to chemical carcinogenesis. A carcinogen that targeted both renal epithelial and mesenchymal cel ...
Full textLink to itemCite
Journal ArticleCancer Res · January 15, 1992
Although altered expression of platelet-derived growth factor (PDGF) is a hallmark of human mesothelioma, expression of PDGF receptors has not been characterized in this cell type. In addition, the expression of this growth factor and its cognate receptor ...
Link to itemCite
Journal ArticleAm J Physiol · January 1992
Antioxidant enzyme activities, H2O2 clearance, and H2O2 generation by rat alveolar epithelial type II cells were compared between in situ, freshly isolated (6 h ex vivo), and cultured cells (48 h ex vivo). Immunocytochemical studies did not show changes in ...
Full textLink to itemCite
Journal ArticleToxicology · 1992
Xenobiotics metabolized in rat pulmonary tissue are often selectively cytotoxic to individual lung cell populations. A non-homogeneous distribution of xenobiotic biotransformation enzymes, e.g., cytochrome P-450 (P-450)- and glutathione (GSH)-associated en ...
Full textLink to itemCite
Journal ArticleAm J Ind Med · 1992
Asbestos fibers may exert their carcinogenic effects on mesothelial cells and bronchial epithelial cells by direct and indirect mechanisms. Direct effects can occur following the physical interaction of fibers with target cells or by the generation of free ...
Full textLink to itemCite
Journal ArticleProg Clin Biol Res · 1992
In man, RCC makes up the largest proportion of primary kidney cancers, comprising approximately 85% of renal tumors and accounting for approximately 2% of the cancer deaths each year (Richie and Skinner 1981). As shown in Table 2, there are many similariti ...
Link to itemCite
Journal ArticleNTP Technical Report on the Toxicity Studies Series · January 1, 1992
Nitrotoluenes are high production volume chemicals used in the synthesis of agricultural and rubber chemicals and in various dyes. Because of differences in the metabolism of the 3 isomers and their capability to bind to DNA, comparative toxicity studies o ...
Cite
Journal ArticleNTP Technical Report on the Toxicity Studies Series · January 1, 1992
t-Butyl perbenzoate (t-BP) is a relatively stable, lipid-soluble, organic peroxide widely used in the polymer industry. Studies were designed to determine the stability of t-BP in various biological media, its dermal absorption and distribution in intact a ...
Cite
Journal ArticleCancer Res · August 15, 1991
A spontaneous form of renal cell carcinoma occurs in rats that arises as the result of the inheritance of a mutation in a single autosomal gene. Cytogenetic analysis was performed on seven cell lines and four primary tumor cell preparations derived from th ...
Link to itemCite
Journal ArticleFundam Appl Toxicol · August 1991
DNA-protein cross-links were formed in the respiratory tract of rhesus monkeys exposed to [14C]formaldehyde (0.7, 2, or 6 ppm; 6 hr). Concentrations of cross-links (pmol/mg DNA) were highest in the mucosa of the middle turbinates; lower concentrations were ...
Full textLink to itemCite
Journal ArticleCancer Res · August 1, 1991
Identification of specific chromosomal aberrations in transformed mesothelial cells is an important step in elucidating the mechanism of transformation of these cells which are targets for occupational and environmental carcinogens, such as asbestos fibers ...
Link to itemCite
Journal ArticleAm J Physiol · August 1991
Extracellular H2O2 release and intracellular H2O2 production were determined in rat lung alveolar macrophages, rat alveolar type II cells, and cultured bovine aortic endothelial cells. Isolated macrophages (5 h ex vivo) released 3.1 +/- 0.09 nmol H2O2.min- ...
Full textLink to itemCite
Journal ArticleCancer Res · June 1, 1991
A hereditary form of renal cell carcinoma exists in rats that results from a single gene mutation and is histologically similar to that described in humans. Cell lines derived from these rat tumors were shown to express abundant transforming growth factor- ...
Link to itemCite
Journal ArticleIn Vitro Cell Dev Biol · December 1990
Primary rat alveolar type II cells and early passage rat lung fibroblasts were co-cultured on opposite sides of a collagen-coated polycarbonate filter. This is an approach to "model", in part, an alveolar wall to study mechanisms of cytotoxicity and transl ...
Full textLink to itemCite
Journal ArticleExp Cell Res · September 1990
Mineral fiber-induced pleural mesothelioma in the rat is a suitable model for asbestos-induced mesothelioma in humans. A proposed mechanism for the genesis of mesotheliomas is the initiation of an autocrine pathway leading to unregulated growth of the meso ...
Full textLink to itemCite
Journal ArticleEnviron Health Perspect · April 1990
The consequences of adventitious infectious agents upon the interpretation of toxicology studies performed in rats and mice are incompletely understood. Several prevalent murine pathogens cause alterations of the respiratory system that can confuse the ass ...
Full textLink to itemCite
Journal ArticleToxicology · 1990
Tracheal implants have served as an important experimental pathology tool with which to study the toxic and/or carcinogenic effects of chemicals upon upper respiratory tract epithelium. Initial studies with this method utilized heterotopic rat tracheal tra ...
Full textLink to itemCite
Journal ArticleAm J Pathol · March 1989
Formaldehyde is a nasal carcinogen in rats but it remains to be determined what cancer risk this chemical poses in humans. Molecular dosimetry studies of formaldehyde and cellular proliferative responses to formaldehyde-induced cytotoxicity have been studi ...
Link to itemCite
Journal ArticleToxicol Pathol · 1989
A tracheal implant model was developed which enabled exposure of differentiated normal human bronchial epithelial cells (NHBE) to a single exposure of a model toxic gas (formaldehyde). NHBE cells were grown in vitro in explant culture under defined serum-f ...
Full textLink to itemCite
Journal ArticleLab Anim Sci · October 1988
Individually housed male AKR/NCrlBR mice used in a chronic inhalation experiment were noted to develop a severe obstructive genitourinary condition. The mouse urologic syndrome (MUS) had one or more of the following features: bladder distension; peripreput ...
Link to itemCite
Journal ArticleFood Chem Toxicol · August 1988
The effect of subchronic exposure to formaldehyde (HCHO; 6 ppm; 6 hr/day, 5 days/wk for 4 wk) on the HCHO concentration in the blood of three rhesus monkeys was investigated. Immediately after the final exposure, the monkeys were sedated, and blood samples ...
Full textLink to itemCite
Journal ArticleLab Anim Sci · August 1988
Male and female C3H/HeNCrl mice were divided into test groups and fed either a purified diet (AIN-76A) or a natural ingredient diet (NIH-07). Lesions of dystrophic cardiac calcinosis (DCC) were found to be more prevalent and more severe in mice fed the pur ...
Link to itemCite
Journal ArticleCarcinogenesis · March 1988
Extrapolation from rodent genotoxicity data to humans is complicated by variables such as interspecies differences in carcinogen metabolism and DNA repair. A xenograft system containing human bronchial epithelial cells was used to assess the induction of u ...
Full textLink to itemCite
Journal ArticleVet Pathol · March 1988
Severe degenerative myocardial disease occurred in female C3H/OUJ mice fed purified diets for 36 weeks; the diet contained 5% or 20% fat as non-hydrogenated soybean oil. Deaths of lactating females of this group (17/35 high fat diet and 7/35 low fat diet a ...
Full textLink to itemCite
Journal ArticleAm J Trop Med Hyg · July 1987
Fatal cases of experimental Plasmodium falciparum (Indochina I) in Bolivian squirrel monkeys (Saimiri sciureus boliviensis) were examined by histologic and ultrastructural methods. Gross lesions were characterized by hepatosplenomegaly and interstitial pul ...
Full textLink to itemCite
Journal ArticleJ Nutr · May 1987
The effects of dietary soybean oil (SBO) concentration (5 vs. 20% by weight) on mammary tumorigenesis, mitogen-induced blastogenesis, cell-mediated cytotoxicity and serum and lymphocyte fatty acid composition were studied in C3H/OUJ female mice. Weanling m ...
Full textLink to itemCite
Journal ArticleJ Am Vet Med Assoc · October 15, 1986
A study was undertaken to determine the effects of a single dermal application of a commercial insecticidal dip containing 78.2% d-limonene in cats. At the manufacturer's recommended concentration of 1.5 oz/gal of water, no clinical signs or lesions of tox ...
Link to itemCite
Journal ArticleVet Pathol · September 1986
One intact and two splenectomized Holstein calves were infected intravenously with a Mexican strain of Babesia bovis and killed following the onset of severe clinical disease. A light and electron microscopic study was conducted on selected tissues to exam ...
Full textLink to itemCite
Journal ArticleJ Am Vet Med Assoc · April 1, 1986
Nerve sheath fibrosarcomas of the left 5th through 8th cranial nerve roots were diagnosed in 1 dog and of the left 4th through 8th cranial nerve roots in another dog. Clinical signs in both dogs included head tilt to the left, circling to the left, left he ...
Link to itemCite
Journal ArticleJ Am Vet Med Assoc · December 15, 1985
We reviewed case records, necropsy reports, and histologic sections from 25 Thoroughbred racehorses that died suddenly at 3 Chicago racetracks. These were young horses ranging in age from 2 to 5 years. There were more females (n = 16) than males (n = 9), a ...
Link to itemCite
Journal ArticleAnn N Y Acad Sci · March 4, 1977
The kinetics of Herpesvirus hominis (Type 1) replication and lesion development in guinea pig skin were determined. The data indicate that lesion scores did not always reflect virus content. Virus replication was detected prior to appearance of lesions and ...
Full textLink to itemCite