The instability within: problems in current analyses of microsatellite instability

Yoshihiko Maehara, Shinya Oda, Keizo Sugimachi

Research output: Contribution to journalReview article

43 Citations (Scopus)

Abstract

Microsatellite instability is regarded as one of the phenotypes of defective DNA mismatch repair and, consequently, as a marker of high risk for cancer. Despite numerous studies, the reported rates for positive microsatellite instability differ widely in each human malignancy. These discrepancies may relate to problems in the methods used. To establish a methodology for an accurate microsatellite instability analysis, technical requirements for a precise assay and biological conditions required for positive microsatellite instability were discussed. First, to describe microsatellite changes in detail, a sensitive detection system with linear detection characteristics and electrophoresis with standardised migration and minimised migration errors are considered to be necessary. Therefore, systems using fluorescent labelling and laser scanning are recommended. For reproducible polymerase chain reactions, it is essential to control the terminal deoxynucleotidyl transferase activity in Taq polymerase. Second, as a biological condition for positive microsatellite instability, feasible selection and combination of microsatellite markers, mutations in specific DNA mismatch repair genes and existence of monoclonal populations enriched sufficiently in a sample are essential. Finally, one possible diagnostic criterion for positive microsatellite instability is proposed, that is the existence of one of the patterns shown in the panel (see Fig. 6) at one or more loci in a set of more than five microsatellite markers. Copyright (C) 2001 Elsevier Science B.V.

Original languageEnglish
Pages (from-to)249-263
Number of pages15
JournalMutation Research - DNA Repair
Volume461
Issue number4
DOIs
Publication statusPublished - Jan 5 2001

Fingerprint

Microsatellite Instability
Microsatellite Repeats
DNA Mismatch Repair
Taq Polymerase
DNA Nucleotidylexotransferase
Repair
Biological Assay
Electrophoresis
Neoplasms
Lasers
Polymerase chain reaction
DNA
Phenotype
Polymerase Chain Reaction
Labeling
Mutation
Assays
Genes
Population
Scanning

All Science Journal Classification (ASJC) codes

  • Molecular Biology
  • Toxicology
  • Genetics

Cite this

The instability within : problems in current analyses of microsatellite instability. / Maehara, Yoshihiko; Oda, Shinya; Sugimachi, Keizo.

In: Mutation Research - DNA Repair, Vol. 461, No. 4, 05.01.2001, p. 249-263.

Research output: Contribution to journalReview article

Maehara, Yoshihiko ; Oda, Shinya ; Sugimachi, Keizo. / The instability within : problems in current analyses of microsatellite instability. In: Mutation Research - DNA Repair. 2001 ; Vol. 461, No. 4. pp. 249-263.
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