The role of foetal red blood cells in protecting cultured lymphocytes against diepoxybutane-induced chromosome breaks

• Tipo: Artigo em Revista Científica Internacional
• Data: 2006

Autores

Porto, B (Autor) ICBAS; Oliveira, RJD (Autor) Outra; Sousa, C (Autor) REIT; Gaspar, J (Autor) Outra; Rueff, J (Autor) Outra; Carvalho, F (Autor) FFUP; Malheiro, I (Autor) Outra

Revista

Título: Mutation Research - Genetic Toxicology and Environmental Mutagenesis

Vol. 603

Páginas: 41-47

ISSN: 1383-5718

Editora: Elsevier

Indexação

ISI Web of Knowledge - 3 Citações

Scopus - 5 Citações

Classificação Científica

FOS: Ciências médicas e da saúde > Medicina básica

Outras Informações

ID Authenticus: P-004-NMM

DOI: 10.1016/j.mrgentox.2005.10.012

Abstract (EN): Diepoxybutane (DEB) is an established mutagen that induces chromosome damage following in vitro treatment of peripheral blood lymphocytes. It is widely used to identify patients with Fanconi Anemia (FA), a clinical situation that is characterized, besides the hypersensitivity to DEB, by an elevated foetal haemoglobin (HbF) content in the peripheral blood. In a previous study, we showed that red blood cells (RBC) from normal individuals can protect cultured lymphocytes against chromosomal breaks induced by DEB and demonstrated the particular role of haemoglobin in the protective effect. In the present work, we studied the influence of RBC extracted from umbilical cord blood of neonates (F cells) on the frequency of DEB-induced chromosome breaks in lymphocyte cultures from normal individuals. Simultaneously, we determined individual GSTT1 and GSTM1 genotypes and the activity of Pi-class glutathione S-transferase (GSTP), catalase and superoxide dismutase (SOD) in adult and foetal RBC. Our results show that F cells, in comparison with adult RBC, elicit abetter protection of cultured lymphocytes from normal individuals against chromosome breaks induced by DEB. Variability in the protective effect among RBC from different individuals was observed; we confirmed that the GSTT1 genotype modulates this inter-individual variability, but it is not sufficient to explain all of the protective effect of F cells. Our results sua-est that the increased protective effect of F cells can be, at least in part, correlated with an increase in the activity of glutathione S-transferase, catalase and superoxide dismutase, in particular Cu/Zn SOD, in F cells compared with adult RBC. p

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7