title: Effect of cystathionine beta-synthase variant 844ins68bp and methylenetetrahydrofolate reductase A1298C polymorphisms in xenografts on 5-FU efficacy and doubling time.
abstract: The association of MTHFR and CBS variants with the doubling time and responsiveness to several chemodrugs was analyzed in 26 human cancer xenografts. The tumors homozygous for the absence of insertion (NN) for the CBS 844ins68bp were more chemosensitive than those with insertion (NI) to TS-1 (P=0.0048), suggesting a potential effect of this variant on fluoropyrimidine efficacy. Furthermore, the doubling time of tumors with a variant C allele (AC or CC) in MTHFR-A1298C was significantly longer than that of tumors with a normal allele (AA) (P=0.0008). Twenty-nine cellular proliferation-related genes were associated with MTHFR-A1298C genotyping and with the doubling time.
authors.affiliation: Department of Surgical Oncology, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8655, Japan. sasaki-1su@h.u-tokyo.ac.jp
authors.forename: Shin
authors.initials: S
authors.lastname: Sasaki
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Watanabe
authors.forename: Takashi
authors.initials: T
authors.lastname: Kobunai
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Nagawa
mesh_terms: D000964:Antimetabolites, Antineoplastic / Q000494:pharmacology*; D014408:Biomarkers, Tumor / Q000378:metabolism; D049109:Cell Proliferation / Q000187:drug effects*; D003541:Cystathionine beta-Synthase / Q000235:genetics*; D005472:Fluorouracil / Q000494:pharmacology*; D020869:Gene Expression Profiling; D014644:Genetic Variation; D005838:Genotype; D006801:Humans; D042965:Methylenetetrahydrofolate Reductase (NADPH2) / Q000235:genetics*; D009369:Neoplasms / Q000235:genetics / Q000473:pathology*; D020411:Oligonucleotide Array Sequence Analysis; D010597:Pharmacogenetics; D011110:Polymorphism, Genetic; D014183:Transplantation, Heterologous
chemical_list: D000964:Antimetabolites, Antineoplastic; D014408:Biomarkers, Tumor; D042965:Methylenetetrahydrofolate Reductase (NADPH2); D003541:Cystathionine beta-Synthase; D005472:Fluorouracil