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Low Incidence of Point Mutation of N-ras Oncogene in Human Gliomas Hideo TSURUSHIMA 1,2 , Tadao OHNO 2 , Kohji TSUBOI 2,3 , Yoshihiko YOSHII 3 , Kotoo MEGURO 1 , Tadao NOSE 3 1Department of Neurosurgery, Tsukuba Medical Center Hospital 2RIKEN Cell Bank, The Institute of Physical and Chemical Research (RIKEN) 3Department of Neurosurgery, Institute of Medicine, Tsukuba University Keyword: N-ras oncogene , Point mutation , Codon 12 and 61 , PCR with mismatched primers , Glioma pp.581-586
Published Date 1995/7/10
DOI https://doi.org/10.11477/mf.1436901046
  • Abstract
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We examined the incidence of point mutations in codon 12 and 61 of N-ras gene in human gliomas using PCR with mismatched primers. This method detects point mutations. PCR with mismatched primers induced restriction sites in normal DNA but not in mutational DNA. Genomic DNAs were extracted from paraffin-embedded tissues and were amplified with nested PCR. Among 17 cases, point mutation has not been able to be found so far, when examined in codon 12 of N-ras gene and among 10 cases in codon 61 of N-ras gene. It can thus be said that point mutational activation of N-ras oncogene is an uncommon event in human gliomas.


Copyright © 1995, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1251 印刷版ISSN 0301-2603 医学書院

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