Data/hora: 10/06/2024 04:56:08

Provedor de dados: | Brazilian Journal of Medical and Biological Research
País: | Brazil
Título: | ABCB1 C1236T, G2677T/A and C3435T polymorphisms in systemic lupus erythematosus patients
Autores: | Gonzalez,T.P.; Mucenic,T.; Brenol,J.C.T.; Xavier,R.M.; Schiengold,M.; Chies,J.A.B.
Data: | 2008-09-01
Ano: | 2008
Palavras-chave: | ABCB1; MDR1; P-glycoprotein; Polymorphism; Systemic lupus erythematosus.
Resumo: | P-glycoprotein (Pgp), the ABCB1 gene product, acts as an efflux pump that transports a large variety of substrates and is a mechanism of cell protection against xenobiotics. An increasing number of studies have shown that some ABCB1 polymorphisms may affect Pgp expression and activity, as well as affecting the development and susceptibility to diseases and pharmacological response. High activity of Pgp has been detected in systemic lupus erythematosus (SLE) patients. The C1236T, G2677T/A, and C3435T are the most commonly studied single nucleotide polymorphisms in the ABCB1 gene. Therefore, their frequencies were determined in Brazilian individuals with European ancestry (N = 143) and in SLE patients (N = 137). Genotyping was performed by PCR-RFLP analysis using specific primers followed by incubation with the appropriate restriction enzymes. The resulting DNA fragments were visualized on agarose or polyacrylamide gels. No statistically significant differences were observed in allelic and genotypic frequencies between SLE and healthy subjects (Fisher exact test). Nevertheless, the 2677A allelic frequency was lower in SLE patients with malar rash (0.007) compared with patients without this feature (0.04; P = 0.0054), while the frequency of this variant was higher in SLE patients with pleuritis (0.07) compared with patients without this feature (0.01; P = 0.0156). We suggest that although the ABCB1 polymorphisms do not directly interfere in SLE susceptibility, their evaluation, especially the 2677A allele, in other immunological processes may be interesting since they can interfere in clinical features of this disease.
Tipo: | Info:eu-repo/semantics/other
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2008000900005
Editor: | Associação Brasileira de Divulgação Científica
Relação: | 10.1590/S0100-879X2008000900005
Formato: | text/html
Fonte: | Brazilian Journal of Medical and Biological Research  v.41 n.9 2008
Fonte: | info:eu-repo/semantics/openAccess