[CHEK2 c.1100delC may not contribute to genetic background of hereditary breast cancer from Shanghai of China].
OBJECTIVE
To investigate the prevalence of CHEK2 c.1100delC mutation among non-BRCA1/BRCA2 familial/early-onset breast cancer patients in Shanghai.


METHODS
One hundred and fourteen non-BRCA1/BRCA2 hereditary breast cancer patients were analyzed, among whom 76 cases had at least one first-degree relative affected with breast cancer and 38 cases were diagnosed as breast cancer below the age of 40 years without family history. The mutation genotyping of CHEK2 c.1100delC were carried out through long-range PCR amplifying of exons 10-14, and followed by amplification of exon 10 and then DNA direct sequencing.


RESULTS
No c.1100delC frame-shift mutation was identified in our studied population. One novel missense mutation 1111C>T (p.His371Tyr), located in kinase catalytic domain, was found in 3 familial breast cancer cases but no one in control group.


CONCLUSIONS
CHEK2 c.1100delC is rare variant for Chinese population and may not contribute to predisposition for hereditary breast cancer in Shanghai. Novel variant -1111C>T could be in association with genetic susceptibility to breast cancer. A further study is needed to confirm the results.
Song
Chuan-gui
CG
Breast Cancer Institute, Cancer Hospital,/Cancer Institute, Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, P. R. China.
Hu
Zhen
Z
Yuan
Wen-tao
WT
Di
Gen-hong
GH
Shen
Zhen-zhou
ZZ
Huang
Wei
W
Shao
Zhi-ming
ZM
D000328:Adult; D000368:Aged; D051017:Apoptosis Regulatory Proteins; D044466:Asian People / Q000235:genetics; D019313:BRCA1 Protein / Q000235:genetics; D024682:BRCA2 Protein / Q000235:genetics; D001483:Base Sequence; D001943:Breast Neoplasms / Q000208:ethnology / Q000235:genetics*; D064447:Checkpoint Kinase 2; D002681:China; D004252:DNA Mutational Analysis; D005260:Female; D016368:Frameshift Mutation; D020022:Genetic Predisposition to Disease / Q000235:genetics; D006801:Humans; D008875:Middle Aged; D020125:Mutation, Missense; D017346:Protein Serine-Threonine Kinases / Q000235:genetics*; D017384:Sequence Deletion; D055815:Young Adult
D051017:Apoptosis Regulatory Proteins; C118024:BLID protein, human; D019313:BRCA1 Protein; C492913:BRCA1 protein, human; D024682:BRCA2 Protein; C551750:BRCA2 protein, human; D064447:Checkpoint Kinase 2; C578634:CHEK2 protein, human; D017346:Protein Serine-Threonine Kinases