[Germline mutation of adenomatous polyposis coli gene in Chinese patients with familial adenomatous polyposis].
OBJECTIVE
To explore the characteristics of adenomatous polyposis coli (APC) gene germline mutations in Chinese patients with familial adenomatous polyposis (FAP).


METHODS
Eighteen members from nine FAP pedigrees were studied by using multiplex ligation-dependent probe amplification(MLPA) to detect large fragment deletion of APC gene. Then, PCR were performed to amplify all exons of APC gene for mutation screening by denaturing high performance liquid chromatography (DHPLC). When abnormal elution profile of DHPLC was found, DNA sequencing was performed to determine the mutations.


RESULTS
Mutations were identified in three pedigrees among the nine pedigrees. They were c.3184_3187 del CAAA in pedigree 2, c.5432C to T in pedigree 4 and c.3925_3929 del AAAAG in pedigree 9 respectively. Among them, c.5432C to T was novel.


CONCLUSIONS
APC gene germline mutations can cause the development of FAP. The FAP patients without APC gene germline mutations could be caused by other mechanisms.
Wang
Ting-ting
TT
Department of Colorectal Surgery, the Affiliated Jiangsu Cancer Hospital, Nanjing Medical University, Nanjing, Jiangsu, 210029 P. R. China.
Chen
Sen-qing
SQ
Zhang
Xiao-mei
XM
D011125:Adenomatous Polyposis Coli / Q000235:genetics*; D000328:Adult; D002851:Chromatography, High Pressure Liquid; D005260:Female; D017491:Genes, APC / Q000502:physiology*; D020022:Genetic Predisposition to Disease / Q000235:genetics; D018095:Germ-Line Mutation; D006801:Humans; D008297:Male; D008875:Middle Aged; D010375:Pedigree