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Mechanistic insights into the cytotoxicity and genotoxicity induced by glycidamide in human mammary cells.

Publication ,  Journal Article
Bandarra, S; Fernandes, AS; Magro, I; Guerreiro, PS; Pingarilho, M; Churchwell, MI; Gil, OM; Batinic-Haberle, I; Gonçalves, S; Rueff, J ...
Published in: Mutagenesis
November 2013

Acrylamide (AA) is a well-known industrial chemical classified as a probable human carcinogen. Benign and malignant tumours at different sites, including the mammary gland, have been reported in rodents exposed to AA. This xenobiotic is also formed in many carbohydrate-rich foods prepared at high temperatures. For this reason, AA is an issue of concern in terms of human cancer risk. The epoxide glycidamide (GA) is thought to be the ultimate genotoxic AA metabolite. Despite extensive experimental and epidemiological data focused on AA-induced breast cancer, there is still lack of information on the deleterious effects induced by GA in mammary cells. The work reported here addresses the characterisation and modulation of cytotoxicity, generation of reactive oxygen species, formation of micronuclei (MN) and quantification of specific GA-DNA adducts in human MCF10A epithelial cells exposed to GA. The results show that GA significantly induces MN, impairs cell proliferation kinetics and decreases cell viability at high concentrations by mechanisms not involving oxidative stress. KU55933, an inhibitor of ataxia telangiectasia mutated kinase, enhanced the cytotoxicity of GA (P < 0.05), supporting a role of this enzyme in regulating the repair of GA-induced DNA lesions. Moreover, even at low GA levels, N7-GA-Gua adducts were generated in a linear dose-response manner in MCF10A cells. These results confirm that human mammary cells are susceptible to GA toxicity and reinforce the need for additional studies to clarify the potential correlation between dietary AA exposure and breast cancer risk in human populations.

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Published In

Mutagenesis

DOI

EISSN

1464-3804

Publication Date

November 2013

Volume

28

Issue

6

Start / End Page

721 / 729

Location

England

Related Subject Headings

  • Toxicology
  • Reactive Oxygen Species
  • Pyrones
  • Oxidation-Reduction
  • Mutagens
  • Morpholines
  • Micronucleus Tests
  • Mammary Glands, Human
  • Humans
  • Glutathione
 

Citation

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Bandarra, S., Fernandes, A. S., Magro, I., Guerreiro, P. S., Pingarilho, M., Churchwell, M. I., … Oliveira, N. G. (2013). Mechanistic insights into the cytotoxicity and genotoxicity induced by glycidamide in human mammary cells. Mutagenesis, 28(6), 721–729. https://doi.org/10.1093/mutage/get052
Bandarra, Susana, Ana S. Fernandes, Inês Magro, Patrícia S. Guerreiro, Marta Pingarilho, Mona I. Churchwell, Octávia Monteiro Gil, et al. “Mechanistic insights into the cytotoxicity and genotoxicity induced by glycidamide in human mammary cells.Mutagenesis 28, no. 6 (November 2013): 721–29. https://doi.org/10.1093/mutage/get052.
Bandarra S, Fernandes AS, Magro I, Guerreiro PS, Pingarilho M, Churchwell MI, et al. Mechanistic insights into the cytotoxicity and genotoxicity induced by glycidamide in human mammary cells. Mutagenesis. 2013 Nov;28(6):721–9.
Bandarra, Susana, et al. “Mechanistic insights into the cytotoxicity and genotoxicity induced by glycidamide in human mammary cells.Mutagenesis, vol. 28, no. 6, Nov. 2013, pp. 721–29. Pubmed, doi:10.1093/mutage/get052.
Bandarra S, Fernandes AS, Magro I, Guerreiro PS, Pingarilho M, Churchwell MI, Gil OM, Batinic-Haberle I, Gonçalves S, Rueff J, Miranda JP, Marques MM, Beland FA, Castro M, Gaspar JF, Oliveira NG. Mechanistic insights into the cytotoxicity and genotoxicity induced by glycidamide in human mammary cells. Mutagenesis. 2013 Nov;28(6):721–729.
Journal cover image

Published In

Mutagenesis

DOI

EISSN

1464-3804

Publication Date

November 2013

Volume

28

Issue

6

Start / End Page

721 / 729

Location

England

Related Subject Headings

  • Toxicology
  • Reactive Oxygen Species
  • Pyrones
  • Oxidation-Reduction
  • Mutagens
  • Morpholines
  • Micronucleus Tests
  • Mammary Glands, Human
  • Humans
  • Glutathione