Screening of thiopurine S-methyltransferase mutations by horizontal conformation-sensitive gel electrophoresis

• Tipo: Artigo em Revista Científica Internacional
• Data: 2000

Autores

Alves, S (Autor) Outra; Prata, MJ (Autor) FCUP; Ferreira, F (Autor) Outra; Amorim, A (Autor) FCUP

Revista

Título: Human Mutation

Vol. 15

Páginas: 246-253

ISSN: 1059-7794

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 31 Citações

Scopus - 29 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Ciências da terra e ciências do ambiente

Outras Informações

ID Authenticus: P-001-1K6

DOI: 10.1002/(sici)1098-1004(200003)15:3<246::aid-humu5>3.0.co;2-#

Abstract (EN): The genetic polymorphism of thiopurine S-methyltransferase (TPMT) has had a highly significant clinical impact due to its association with individual variation in the toxicity and therapeutic efficiency of thiopurine drugs, which are pharmaceutical agents widely used in the treatment of several kinds of diseases. Until now ten mutant alleles responsible for TPMT deficiency and several silent and intronic mutations have been described, In this work we present an alternative molecular method for the detection of TPMT alleles, It is an adaptation for horizontal conditions of a conformation-sensitive gel electrophoresis technique. The method has proven to be very efficient as a rapid screening approach for the study of TPMT genetic variability. The method was applied to analyse eight TPMT exons and the corresponding flanking intronic regions in a sample of unrelated healthy individuals from North Portugal, Here we report the allelic frequencies concerning TPMT-deficient alleles and several silent and intronic mutations, including two newly detected intronic polymorphisms: an A (-101) T substitution in intron 3 and a variation involving the number of T nucleotides in a DNA stretch in intron 5, Additionally, we also present data from a sample of 43 children undergoing therapy for acute lymphoblastic leukemia, In this clinical sample we have registered a statistically significant higher frequency for the TPMT*3C allele, This finding raises the question whether the TPMT genotype can contribute to any genetic predisposition for development of the malignancy. Hum Mutat 15:246-253, 2000, (C) 2000 Wiley-Liss, Inc.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8