Journal ArticlePloS one · January 2012
Malignant and inflammatory tissues sometimes express endogenous retroviruses or their proteins. A highly-conserved sequence from retroviral transmembrane (TM) proteins, termed the "immunosuppressive domain (ID)", is associated with inhibition of immune and ...
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Journal ArticleCell Transplant · 2012
Inflammatory insults following islet transplantation (ITx) hinders engraftment and long-term function of the transplanted (Tx) islets. Using a murine model of ITx, we determined the role of LMP-420, a novel TNF-α inhibitor, both individually and in combina ...
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Journal ArticleLeukemia · September 2010
B-cell chronic lymphocytic leukemia (CLL) is characterized by slow accumulation of malignant cells, which are supported in the microenvironment by cell-cell interactions and soluble cytokines such as tumor necrosis factor (TNF). We evaluated the effect of ...
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Journal ArticleJ Leukoc Biol · November 2009
alpha(2)M* targets antigens to APCs for rapid internalization, processing, and presentation. When used as an antigen-delivery vehicle, alpha(2)M* amplifies MHC class II presentation, as demonstrated by increased antibody titers. Recent evidence, however, s ...
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Journal ArticleJ Immunol · June 15, 2009
The lung is constantly challenged during normal breathing by a myriad of environmental irritants and infectious insults. Pulmonary host defense mechanisms maintain homeostasis between inhibition/clearance of pathogens and regulation of inflammatory respons ...
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Journal ArticleJ Inflamm (Lond) · March 10, 2008
BACKGROUND: LMP-420 is a boronic acid-containing purine nucleoside analogue that transcriptionally inhibits TNF production but is non-cytotoxic to TNF-producing cells. METHODS: This study investigated the efficacy of LMP-420 as an anti-inflammatory agent i ...
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Journal ArticleJ Leukoc Biol · February 2008
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CpG oligodeoxynucleotides (ODN) stimulate the immune system and are under evaluation as treatments and vaccine adjuvants for infectious diseases, cancer, and immune system disorders. Although they have shown promising results in numerous clinical trials, t ...
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Journal ArticleInt J Biol Macromol · January 1, 2008
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alpha2-Macroglobulin (alpha2M) is a 718 kDa homotetrameric proteinase inhibitor which undergoes a large conformational change upon activation. This conformational change can occur either by proteolytic attack on an approximately 40 amino acid stretch, the ...
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Journal ArticleBiochem Biophys Res Commun · June 1, 2007
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alpha(2)-Macroglobulin (alpha(2)M) is a proteinase inhibitor that functions by a trapping mechanism which has been exploited such that the receptor-recognized, activated form (alpha(2)M( *)) can be employed to target antigens to antigen-presenting cells. A ...
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Journal ArticleAIDS Res Ther · March 31, 2006
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BACKGROUND: Co-infections of human immunodeficiency virus (HIV) and Mycobacterium tuberculosis (M. Tb) are steadily increasing and represent a major health crisis in many developing countries. Both pathogens individually stimulate tumor necrosis factor-alp ...
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Journal ArticleJ Biochem · November 2005
We have characterized native and activated forms of rabbit alpha1M and compared them to rabbit and human alpha2M. Similar to human alpha2M, rabbit alpha1M is a tetramer associated via disulfide bonds and non-covalent interactions that exhibits autolysis in ...
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Journal ArticlePLoS Med · September 2005
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BACKGROUND: Malaria is still a major public health problem, partly because the pathogenesis of its major complication, cerebral malaria (CM), remains incompletely understood. However tumor necrosis factor (TNF) is thought to play a key role in the developm ...
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Journal ArticleJ Immunol · April 1, 2005
Dendritic cells (DCs) are a key part of host defense against microbial pathogens, being part of the innate immune system, but also instructing the adaptive T cell response. This study was designed to evaluate whether human DCs directly contribute to innate ...
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Journal ArticlePeptides · May 2003
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CKS-17, a synthetic peptide representing a unique amino acid motif which is highly conserved in retroviral transmembrane proteins and other immunoregulatory proteins, induces selective immunomodulatory functions, both in vitro and in vivo, and activates in ...
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Journal ArticleVaccine · May 22, 2002
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Critical to the success of HIV-1 subunit vaccines is the development of strategies to augment vaccine immunogenicity. Successful adjuvants must not only improve immunogenicity above current adjuvant levels, but must also decrease the dose of immunogen requ ...
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Journal ArticleVaccine · November 12, 2001
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A safe, effective, more potent adjuvant than currently available would be beneficial in developing new therapeutics and diagnostic reagents. We report here a technique for the rapid, efficient incorporation of non-proteolytic antigens into alpha(2)-macrogl ...
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Journal ArticleJ Cell Biochem · 2001
Thioglycollate (TG)-elicited murine, peritoneal macrophages express two receptors for activated forms of the proteinase inhibitor alpha2-macroglobulin (alpha2M*)--namely, the low density lipoprotein receptor-related protein (LRP) and the alpha2M signaling ...
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Journal ArticleJ Leukoc Biol · June 1997
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Studies of the effects of retroviruses on the immune system, which date back through thirty years of investigations, are reviewed. In the earliest published studies in the 1960s, it was demonstrated that mice infected with oncogenic viruses were immunosupp ...
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Journal ArticlePloS one · January 2012
Malignant and inflammatory tissues sometimes express endogenous retroviruses or their proteins. A highly-conserved sequence from retroviral transmembrane (TM) proteins, termed the "immunosuppressive domain (ID)", is associated with inhibition of immune and ...
Full textCite
Journal ArticleCell Transplant · 2012
Inflammatory insults following islet transplantation (ITx) hinders engraftment and long-term function of the transplanted (Tx) islets. Using a murine model of ITx, we determined the role of LMP-420, a novel TNF-α inhibitor, both individually and in combina ...
Full textLink to itemCite
Journal ArticleLeukemia · September 2010
B-cell chronic lymphocytic leukemia (CLL) is characterized by slow accumulation of malignant cells, which are supported in the microenvironment by cell-cell interactions and soluble cytokines such as tumor necrosis factor (TNF). We evaluated the effect of ...
Full textLink to itemCite
Journal ArticleJ Leukoc Biol · November 2009
alpha(2)M* targets antigens to APCs for rapid internalization, processing, and presentation. When used as an antigen-delivery vehicle, alpha(2)M* amplifies MHC class II presentation, as demonstrated by increased antibody titers. Recent evidence, however, s ...
Full textLink to itemCite
Journal ArticleJ Immunol · June 15, 2009
The lung is constantly challenged during normal breathing by a myriad of environmental irritants and infectious insults. Pulmonary host defense mechanisms maintain homeostasis between inhibition/clearance of pathogens and regulation of inflammatory respons ...
Full textLink to itemCite
Journal ArticleJ Inflamm (Lond) · March 10, 2008
BACKGROUND: LMP-420 is a boronic acid-containing purine nucleoside analogue that transcriptionally inhibits TNF production but is non-cytotoxic to TNF-producing cells. METHODS: This study investigated the efficacy of LMP-420 as an anti-inflammatory agent i ...
Full textLink to itemCite
Journal ArticleJ Leukoc Biol · February 2008
Featured Publication
CpG oligodeoxynucleotides (ODN) stimulate the immune system and are under evaluation as treatments and vaccine adjuvants for infectious diseases, cancer, and immune system disorders. Although they have shown promising results in numerous clinical trials, t ...
Full textLink to itemCite
Journal ArticleInt J Biol Macromol · January 1, 2008
Featured Publication
alpha2-Macroglobulin (alpha2M) is a 718 kDa homotetrameric proteinase inhibitor which undergoes a large conformational change upon activation. This conformational change can occur either by proteolytic attack on an approximately 40 amino acid stretch, the ...
Full textLink to itemCite
Journal ArticleBiochem Biophys Res Commun · June 1, 2007
Featured Publication
alpha(2)-Macroglobulin (alpha(2)M) is a proteinase inhibitor that functions by a trapping mechanism which has been exploited such that the receptor-recognized, activated form (alpha(2)M( *)) can be employed to target antigens to antigen-presenting cells. A ...
Full textLink to itemCite
Journal ArticleAIDS Res Ther · March 31, 2006
Featured Publication
BACKGROUND: Co-infections of human immunodeficiency virus (HIV) and Mycobacterium tuberculosis (M. Tb) are steadily increasing and represent a major health crisis in many developing countries. Both pathogens individually stimulate tumor necrosis factor-alp ...
Full textLink to itemCite
Journal ArticleJ Biochem · November 2005
We have characterized native and activated forms of rabbit alpha1M and compared them to rabbit and human alpha2M. Similar to human alpha2M, rabbit alpha1M is a tetramer associated via disulfide bonds and non-covalent interactions that exhibits autolysis in ...
Full textLink to itemCite
Journal ArticlePLoS Med · September 2005
Featured Publication
BACKGROUND: Malaria is still a major public health problem, partly because the pathogenesis of its major complication, cerebral malaria (CM), remains incompletely understood. However tumor necrosis factor (TNF) is thought to play a key role in the developm ...
Full textLink to itemCite
Journal ArticleJ Immunol · April 1, 2005
Dendritic cells (DCs) are a key part of host defense against microbial pathogens, being part of the innate immune system, but also instructing the adaptive T cell response. This study was designed to evaluate whether human DCs directly contribute to innate ...
Full textLink to itemCite
Journal ArticlePeptides · May 2003
Featured Publication
CKS-17, a synthetic peptide representing a unique amino acid motif which is highly conserved in retroviral transmembrane proteins and other immunoregulatory proteins, induces selective immunomodulatory functions, both in vitro and in vivo, and activates in ...
Full textLink to itemCite
Journal ArticleVaccine · May 22, 2002
Featured Publication
Critical to the success of HIV-1 subunit vaccines is the development of strategies to augment vaccine immunogenicity. Successful adjuvants must not only improve immunogenicity above current adjuvant levels, but must also decrease the dose of immunogen requ ...
Full textLink to itemCite
Journal ArticleVaccine · November 12, 2001
Featured Publication
A safe, effective, more potent adjuvant than currently available would be beneficial in developing new therapeutics and diagnostic reagents. We report here a technique for the rapid, efficient incorporation of non-proteolytic antigens into alpha(2)-macrogl ...
Full textLink to itemCite
Journal ArticleJ Cell Biochem · 2001
Thioglycollate (TG)-elicited murine, peritoneal macrophages express two receptors for activated forms of the proteinase inhibitor alpha2-macroglobulin (alpha2M*)--namely, the low density lipoprotein receptor-related protein (LRP) and the alpha2M signaling ...
Full textLink to itemCite
Journal ArticleJ Leukoc Biol · June 1997
Featured Publication
Studies of the effects of retroviruses on the immune system, which date back through thirty years of investigations, are reviewed. In the earliest published studies in the 1960s, it was demonstrated that mice infected with oncogenic viruses were immunosupp ...
Full textLink to itemCite
Journal ArticleProc Natl Acad Sci U S A · April 1, 1997
Featured Publication
HIV-1 Nef protein shares a significant homology with the immunosuppressive and highly conserved retroviral transmembrane protein p15E. In the present study, extracellular Nef protein is shown to induce interleukin (IL)-10 mRNA expression in human periphera ...
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Journal ArticleProc Natl Acad Sci U S A · June 6, 1995
Featured Publication
A synthetic heptadecapeptide, CKS-17, represents the highly conserved amino acid sequences occurring within the transmembrane envelope protein of many animal and human retroviruses. CKS-17 has been demonstrated to exhibit suppressive properties for numerou ...
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Journal ArticleExp Eye Res · May 1995
Monocytes and retinal pigment epithelial cells are intimately associated in membranes of eyes with proliferative vitreoretinopathy and in certain types of uveitis. The goal of this study was to determine whether monocytes modulate cytokine expression in re ...
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Journal ArticleProc Natl Acad Sci U S A · April 11, 1995
The influence of a synthetic retroviral peptide, CKS-17, on T helper type 1 (Th1)- or Th2-related cytokines was investigated in human blood mononuclear cells. Cells were stimulated with staphylococcal enterotoxin A, anti-CD3 plus anti-CD28 monoclonal antib ...
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Journal ArticleExpert Opinion on Investigational Drugs · July 1, 1994
Drugs, currently in development and targeted toward macrophages, are principally aimed at the down-regulation of macrophage function to treat the wide variety of diseases caused by excessive activity of these cells. The principal current strategy for devel ...
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Journal ArticleJ Immunol · September 1, 1993
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We have previously shown that a synthetic peptide (CKS-17) homologous to retroviral envelope protein suppresses the accumulation of superantigen staphylococcal enterotoxin-induced TNF-alpha mRNA in human PBMC and in highly purified human monocytes. The pre ...
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Journal ArticleJ Med Chem · November 13, 1992
A novel series of diaminoanthraquinones was discovered initially as protein kinase C inhibitors with IC50s in the 50-100 microM range. They exhibited potent tumor cell growth inhibitory activity in vitro without cross resistance to adriamycin. Further eval ...
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Journal ArticleJ Leukoc Biol · October 1992
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We investigated the influence of CKS-17, a synthetic heptadecapeptide that corresponds to a highly conserved domain of the immunosuppressive retroviral envelope protein p15E, on staphylococcal enterotoxin B (SEB)-induced TNF-alpha gene expression in human ...
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Journal ArticleCell Immunol · May 1992
CKS-17, a synthetic amino acid peptide homologous to a highly conserved region of retroviral transmembrane protein exerts a suppressive action on staphylococcal enterotoxin A (SEA)-induced the production of IFN-gamma by human peripheral blood mononuclear c ...
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Journal ArticleImmunol Lett · April 1991
Experiments were carried out to analyze the binding sites on human cells for highly purified retroviral protein p15E isolated from Feline Leukemia Virus, Rickard Strain. Binding of 125I-labeled p15E was tested with surfaces of human peripheral blood lympho ...
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Journal ArticleCancer Detect Prev · 1991
Certain retroviral envelope proteins and peptides have been shown to be highly immunosuppressive. Recently, we have demonstrated that a synthetic 17 amino acid peptide (CKS-17*) homologous to a highly conserved region in the transmembrane portion of the en ...
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Journal ArticleMicrobiol Immunol · 1991
CKS-17, an immunosuppressive peptide homologous to certain retroviral transmembrane envelope protein, has been shown to inhibit lymphocyte proliferation in response to mitogens or alloantigens when covalently attached to bovine serum albumin (CKS-17-BSA). ...
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Journal ArticleJ Immunol · October 15, 1990
Retroviral infection is associated with immunosuppression, which has been shown to be due, in part, to the action of the envelope protein p15E. We studied a synthetic peptide (CKS-17) homologous to a highly conserved domain of the retroviral envelope prote ...
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Journal ArticleJ Immunol · July 15, 1990
A synthetic 17 amino acid peptide (CKS-17) homologous to a highly conserved region of human and animal retroviral transmembrane proteins was investigated for its influence on the generation of murine alloantigen-specific CTL activity in vitro. CKS-17 coupl ...
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Journal ArticleCell Immunol · July 1990
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Soluble suppressor factor (SSF), first described in association with HIV-1 infection in vivo, is a molecule(s) capable of inhibiting T cell-dependent immune reactivity. Its relationship to human immunodeficiency virus (HIV) was further defined as supernata ...
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Journal ArticleJ Immunol · June 15, 1989
We studied the mode of action of the synthetic peptide CKS-17, which is a heptadecapeptide homologous to a highly conserved region of the immunosuppressive retroviral envelope protein p15E, as well as to envelope proteins of the human T cell leukemia virus ...
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Journal ArticleJ Immunol · March 15, 1989
The effects of IL-1 on vascular endothelium result in a complex set of alterations which are potentially disruptive of vessel wall and underlying tissue integrity. The present study was aimed at investigating possible regulation of such potentially destruc ...
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Journal ArticleCancer Immunol Immunother · 1989
CKS-17 is a heptadecapeptide corresponding to a region highly conserved in retroviral transmembrane proteins such as p15E. Because a relationship had previously been determined between p15E and immunosuppressive tumor cell products, we examined the effect ...
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Journal ArticleImmunol Lett · September 1988
Immunosuppression frequently accompanies infections with the human retroviruses HTLV-1 and HIV. Previous studies have shown that UV-inactivated and detergent-disrupted preparations of either virus can produce immune dysfunction in vitro although the active ...
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Journal ArticleJ Immunol · July 15, 1988
A synthetic 17 amino acid peptide (CKS-17) homologous to a highly conserved region of human and animal retroviral transmembrane proteins was investigated for its influence on the in vitro production of IFN-gamma from human peripheral mononuclear cells. The ...
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Journal ArticleProc Natl Acad Sci U S A · October 1987
Retroviral envelope protein p15E and antigenically related proteins have been implicated as potential mediators of immune dysfunction associated with retroviral infections and with neoplasia. Due to its extreme hydrophobicity, purified p15E has not been av ...
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Journal ArticleJ Immunol · October 1, 1987
The synthetic peptide CKS-17 has homology to a highly conserved region of the immunosuppressive retroviral envelope protein P15E, to envelope proteins of HTLV I, II, III, and to that encoded by an endogeneous C-type human retroviral DNA. CKS-17 inhibits th ...
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Journal ArticleProc Natl Acad Sci U S A · April 1987
A highly immunogenic epitope from a conserved COOH-terminal region of the human immunodeficiency virus (HIV) gp120 envelope protein has been identified with antisera from HIV-seropositive subjects and a synthetic peptide (SP-22) containing 15 amino acids f ...
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Journal ArticleJ Immunol · April 1, 1987
The present study was designed to characterize the production of chemoattractants by human melanoma lines with high (M4Be, M3Da, NTerDa) or low tumorigenic (Doc8, M1Do) potential when heterotransplanted in nude mice. Supernatants from the Doc8 and M1Do cel ...
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Journal ArticleJ Immunol · February 1, 1987
It has been shown previously that the retroviral envelope protein p15E suppresses certain monocyte and lymphocyte functions. In this paper, we describe the effects on natural killer (NK) activity of a synthetic peptide (CKS-17) with homology to a region of ...
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Journal ArticleProc Natl Acad Sci U S A · January 1987
Purified feline leukemia virus, UV light-inactivated feline leukemia virus, and a synthetic peptide (CKS-17) homologous to a well-conserved region of the transmembrane components of several human and animal retroviruses were each studied for their effects ...
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Journal ArticleJ Immunol · October 15, 1986
Two sets of seemingly contradictory evidence have been reported concerning the effects of tumor cell products on the regulation of monocyte migration in vitro and presumably the extravasation of macrophages into tumors in vivo. The present study was design ...
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Journal ArticleBiochim Biophys Acta · August 5, 1986
The immune mechanisms by which a host recognizes and destroys a growing tumor are undoubtedly complex and, as yet, incompletely understood. It is apparent, however, that mononuclear phagocytes play an important role in the defense against neoplastic diseas ...
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Journal ArticleCancer Metastasis Rev · 1986
Monocytes and macrophages play an important role in host defense against neoplasia. Studies from our and other laboratories have demonstrated that patients with a variety of cancers have a defect in monocyte chemotactic responses. Tumor-bearing mice are al ...
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Journal ArticleScience · October 25, 1985
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The retroviral transmembrane envelope protein p15E is immunosuppressive in that it inhibits immune responses of lymphocytes, monocytes, and macrophages. A region of p15E has been conserved among murine and feline retroviruses; a homologous region is also f ...
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Journal ArticleClin Exp Immunol · July 1985
Phenol-saline tumour extracts, active in the immunotherapy of bovine ocular squamous cell carcinoma (BOSCC), were used to immunize mice. The immunized mice became resistant to the depression of delayed type hypersensitivity (DTH) reactions by products of B ...
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Journal ArticleImmunol Today · August 1984
Type C retroviral infections can cause profound immunosuppression as well as neoplasms. The retroviral envelope protein p15E has both immunosuppressive and anti-inflammatory activities which may contribute to the pathogenicity of retroviruses. Murine and h ...
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Journal ArticleJ Exp Med · March 1, 1984
Virus-related oncogenes have been demonstrated in human tumor cells and may play a role in neoplastic transformation. Cancerous effusions contain inhibitors of monocyte function and are absorbed by monoclonal antibodies to the immunosuppressive retroviral ...
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Journal ArticleJ Exp Med · September 1, 1983
Murine tumors contain low molecular weight factors that inhibit macrophage accumulation at inflammatory foci. Certain oncogenic murine leukemia viruses contain similar inhibitory activity and the active component of the retroviruses was shown to be the env ...
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Journal ArticleCancer Res · September 1983
An extensive Phase I evaluation of human lymphoblastoid interferon has been completed which, in addition to describing its clinical and pharmacological effects, emphasized a broad-scale evaluation of the immune response as a function of interferon dosage. ...
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Journal ArticleJ Clin Invest · October 1981
Individuals with cancer have previously been shown to have abnormal chemotactic responsiveness. Surgical removal of the tumor often resulted in normalization of monocyte function, which suggests that human neoplasms might inhibit monocyte chemotaxis by rel ...
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Journal ArticleJ Clin Invest · January 1981
The chemotactic migration of leukocytes is preceded by an alteration in the cells' shape from round to a characteristic polar configuration. We have developed an assay that shows that human monocytes, when exposed to chemoattractant in suspension, assume t ...
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Journal ArticleJ Natl Cancer Inst · October 1980
Extracts prepared from spontaneous mouse mammary adenocarcinomas, as well as plasma and urine from inbred C3H/HeN mice carrying murine mammary tumor virus and bearing such tumors, significantly inhibited the accumulation of macrophages at inflammatory site ...
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Journal ArticleJ Immunol · June 1980
Low m.w. extracts from three known oncogenic viruses, Friend, Moloney, and Rauscher, inhibited the accumulation of macrophages at sites of delayed inflammatory reactions in mice. The potential biologic significance of these proteins is suggested by their p ...
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Journal ArticleTransplantation · April 1977
Pooled serum from 6- to 8-week-old female Lewis x Brown Norwegian F1 hybrid (LBNF1) rats undergoing acute local graft-versus-host (GVH) reactions was found to have the ability, when compared with normal F1 serum, to increase node weight in a popliteal lymp ...
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Journal ArticleImmunology · April 1972
A simple method for rapid and large scale (over 109 cells) separation of peritoneal macrophages by incubation in a glass-bead column and elution with buffered ethylenediamine tetraacetic acid (EDTA) solution is described. Macrophages obtained were about 90 ...
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