HMLH1 gene mutation in gastric cancer patients and their kindred
| Autor: | Min Liu, Jian-Hua Li, Guowang Xu, Wan-Ming Cui, Jing Jiang, Shen Lü, Li-Na Liu, Xianzhe Shi |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Adult
Male China Population Gene mutation Biology Exon Stomach Neoplasms medicine Humans Point Mutation Mutation frequency education Gene Adaptor Proteins Signal Transducing Genetics education.field_of_study Point mutation digestive oral and skin physiology Gastroenterology Nuclear Proteins Cancer Exons General Medicine Middle Aged medicine.disease digestive system diseases Neoplasm Proteins Mutation (genetic algorithm) Brief Reports Female Carrier Proteins MutL Protein Homolog 1 |
| Zdroj: | World Journal of Gastroenterology. 11:3144 |
| ISSN: | 1007-9327 |
| DOI: | 10.3748/wjg.v11.i20.3144 |
| Popis: | AIM: To study the status of hMLH1 gene point mutations of gastric cancer kindreds and gastric cancer patients from northern China, and to find out gene mutation status in the population susceptible to gastric cancer. METHODS: Blood samples of 120 members from five gastric cancer families, 56 sporadic gastric cancer patients and control individuals were collected. After DNA extraction, the mutations of exon 8 and exon 12 of hMLH1 gene were investigated by PCR-SSCP-CE, followed by DNA sequencing. RESULTS: In the five kindreds, the mutation frequency was 25% (5/16) for the probands and 18% (19/104) for the non-cancerous members, which were significantly higher than the controls (P＜0.01 χ2 = 7.71, P＜0.01 χ2 = 8.65, respectively). In the sporadic gastric cancer, the mutation frequency was 7% (4/56), which was similar to that (5/100) in the healthy controls. The mutation point of exon 8 was at 219 codon of hMLH1 gene (A-G), resulting in a substitution of Ile-Val (ATC-GTC), whereas the mutation of exon 12 was at 384 codon of hMLH1 gene (T-A) resulting in a substitution of Asp-Val (GTT-GAT), which were the same as previously found in hereditary nonpolyposis colorectal carcinoma. CONCLUSION: The members of gastric cancer families from northern China may have similar genetic background of hMLH1 gene mutation as those of hereditary nonpolyposis colorectal carcinoma. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|