title: Prevalence of pathological germline mutations of hMLH1 and hMSH2 genes in colorectal cancer.
abstract: The prevalence of pathological germline mutations in colorectal cancer has been widely studied, as germline mutations in the DNA mismatch repair genes hMLH1 and hMSH2 confer a high risk of colorectal cancer. However, because the sample size and population of previous studies are very different from each other, the conclusions still remain controversial. In this paper, Databases such as PubMed were applied to search for related papers. The data were imported into Comprehensive Meta-Analysis V2, which was used to estimate the weighted prevalence of hMLH1 and hMSH2 pathological mutations and compare the differences of prevalence among different family histories, ethnicities and related factors. This study collected and utilized data from 102 papers. In the Amsterdam-criteria positive group, the prevalence of pathological germline mutations of the hMLH1 and hMSH2 genes was 28.55% (95%CI 26.04%-31.19%) and 19.41% (95%CI 15.88%-23.51%), respectively, and the prevalence of germline mutations in hMLH1/hMSH2 was 15.44%/10.02%, 20.43%/13.26% and 15.43%/11.70% in Asian, American multiethnic and European/Australian populations, respectively. Substitution mutations accounted for the largest proportion of germline mutations (hMLH1: 52.34%, hMSH2: 43.25%). The total prevalence of mutations of hMLH1 and hMSH2 in Amsterdam-criteria positive, Amsterdam-criteria negative and sporadic colorectal cancers was around 45%, 25% and 15%, respectively, and there were no obvious differences in the prevalence of germline mutations among different ethnicities.
authors.affiliation: Department of Epidemiology, Public Health College, Harbin Medical University, Harbin, Heilongjiang Province, P. R. China.
authors.forename: Dandan
authors.initials: D
authors.lastname: Li
authors.forename: Fulan
authors.initials: F
authors.lastname: Hu
authors.forename: Fan
authors.initials: F
authors.lastname: Wang
authors.forename: Binbin
authors.initials: B
authors.lastname: Cui
authors.forename: Xinshu
authors.initials: X
authors.lastname: Dong
authors.forename: Wencui
authors.initials: W
authors.lastname: Zhang
authors.forename: Chunqing
authors.initials: C
authors.lastname: Lin
authors.forename: Xia
authors.initials: X
authors.lastname: Li
authors.forename: Da
authors.initials: D
authors.lastname: Wang
authors.forename: Yashuang
authors.initials: Y
authors.lastname: Zhao
mesh_terms: D048868:Adaptor Proteins, Signal Transducing / Q000235:genetics*; D015179:Colorectal Neoplasms / Q000235:genetics*; D005006:Ethnicity / Q000235:genetics; D005787:Gene Frequency; D018095:Germ-Line Mutation; D006801:Humans; D000070957:MutL Protein Homolog 1; D051718:MutS Homolog 2 Protein / Q000235:genetics*; D009687:Nuclear Proteins / Q000235:genetics*
chemical_list: D048868:Adaptor Proteins, Signal Transducing; C501486:MLH1 protein, human; D009687:Nuclear Proteins; C497172:MSH2 protein, human; D000070957:MutL Protein Homolog 1; D051718:MutS Homolog 2 Protein