title: [Microsatellite instability of genome in cells of sporadic and hereditary carcinoma of the gastrointestinal tract].
abstract: Microsatellite instability (MIN) of human genome, i.e. instability of very short (1-5 nt) DNA tandem repeats, points to a deficiency in the mismatch repair system (MMR). To investigate the role of MMR in sporadic and hereditary carcinogenesis in the gastrointestinal tract, four types of carcinomas were compared: sporadic (GC), familial (FGC) gastric carcinoma, sporadic colorectal (CC) and hereditary nonpolyposis colorectal (HNPCC) carcinoma. No significant difference in MIN frequency was found between GC (9 out of 27) (33%) and CC (7 out of 29) (24%). In hereditary carcinoma group, MIN occurrence appeared 2-3 times as high: FGC in 7 out of 10 (70%) and HNPCC in 6 out of 8 patients (75%). No significant differences were recorded in MIN occurrence at early and later stages of the disease in all groups. Therefore, it can be suggested that disorders in the MMR develop at earlier stages of carcinogenesis and may be responsible for tumor progression.
authors.affiliation: B.P. Konstantinov Institute of Nuclear Physics, Russian Academy of Sciences.
authors.forename: O A
authors.initials: OA
authors.lastname: Vostriukhina
authors.forename: I F
authors.initials: IF
authors.lastname: Nikiforova
authors.forename: T A
authors.initials: TA
authors.lastname: Shtam
authors.forename: S L
authors.initials: SL
authors.lastname: Kantorov
authors.forename: K Iu
authors.initials: KIu
authors.lastname: Tutaev
authors.forename: A R
authors.initials: AR
authors.lastname: Shumakov
authors.forename: S V
authors.initials: SV
authors.lastname: Komissarova
authors.forename: V P
authors.initials: VP
authors.lastname: Kalinovskiĭ
authors.forename: S V
authors.initials: SV
authors.lastname: Vasil'ev
authors.forename: V K
authors.initials: VK
authors.lastname: Kovalev
mesh_terms: D001483:Base Sequence; D002277:Carcinoma / Q000235:genetics*; D015179:Colorectal Neoplasms / Q000235:genetics*; D004247:DNA / Q000235:genetics*; D053938:DNA Fragmentation; D017931:DNA Primers / Q000235:genetics; D004261:DNA Replication; D004273:DNA, Neoplasm / Q000235:genetics; D003627:Data Interpretation, Statistical; D005784:Gene Amplification; D006652:Histological Techniques; D006801:Humans; D008207:Lymphatic Metastasis; D018895:Microsatellite Repeats / Q000235:genetics; D008969:Molecular Sequence Data; D009154:Mutation; D009362:Neoplasm Metastasis; D010375:Pedigree; D016133:Polymerase Chain Reaction; D018807:Polymorphism, Single-Stranded Conformational; D013274:Stomach Neoplasms / Q000235:genetics*
chemical_list: D017931:DNA Primers; D004273:DNA, Neoplasm; D004247:DNA