Thirty novel genetic variations in the SLC29A1 gene encoding human equilibrative nucleoside transporter 1 (hENT1).
Journal: 2006/September - Drug Metabolism and Pharmacokinetics
ISSN: 1347-4367
PUBMED: 16858130
Abstract:
Thirty-nine genetic variations, including thirty novel ones, were found in the human SLC29A1 gene, which encodes equilibrative nucleoside transporter 1, from 256 Japanese cancer patients administered gemcitabine. The found novel variations included -8,166G>A, -81,10A>G, -7,947G>A, -7,789T>C, -5,595G>A, -3,803_-3,783delTCGGGGAGGTGGCAGTGGGCG, -3,548G>C, -3,414G>A, -1355T>C, -34C>G, IVS1+141G>A, IVS1+260C>T, IVS1-82C>T, 177C>G, IVS3-6C>T, 564C>T, IVS8+44T>C, IVS8+90T>C, IVS8+97T>C, IVS8+131C>T, IVS8+169G>A, 933T>C, 954C>T, IVS11-52G>C, IVS11-46G>A, 1,288G>A, 1,641C>G, 1,703_1,704delGT, 1812C>T, and 1861C>T. The frequencies were 0.051 for IVS8+169G>A, 0.012 for -7,947G>A, 0.006 for IVS1+141G>A and 1,703_1,704delGT, 0.004 for -8,166G>A, -8,110A>G, -3,548G>C, -1,355T>C, -34C>G, IVS8+44T>C, and 1,812C>T, and 0.002 for the other 19 variations. Among them, 177C>G and 1,288G>A resulted in amino acid substitutions Asp59Glu and Ala430Thr, respectively. Using the detected polymorphisms, linkage disequilibrium analysis was performed, and 28 haplotypes were identified or inferred. Our findings would provide fundamental and useful information for genotyping SLC29A1 in the Japanese and probably other Asian populations.
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