基于二代測(cè)序技術(shù)探尋一胃癌家系突變情況分析
[Abstract]:Objective: the genetic mechanism of gastric cancer has not been fully clarified. This study hopes to screen a gastric cancer family with tumor-related genes by using the second generation gene sequencing technique, so as to clarify the pathogenic genes of this family. Methods: three children of the same generation (1 died) were collected from a family of gastric cancer in the second Hospital of Landa University. 2 patients were examined by medical history, laboratory examination and abdominal CT examination, and the clinical diagnosis (laboratory examination, abdominal color Doppler ultrasound, gastroscopy, pathological examination, etc.) was improved after obtaining the informed consent of the family members. The peripheral blood of the family members was collected and stored in the tumor Research Center of Lan sophomore Hospital for examination. The clinical and genetic characteristics of the family were summarized and the family spectrum was constructed. The genetic tumor pathogenic genes of 4 members of the family were detected by the second generation gene sequencing technique, and the gene mutation of the family was detected. Results: there were 3 patients, 1 patient with highly differentiated adenocarcinoma, 1 patient with Indian ring cell carcinoma, 1 patient with unknown pathological type, 1 family member with extragastric malignant tumor, 12 family members were diagnosed with benign gastric diseases, and 7 of 8 family members were diagnosed with HP infection by Hp. The samples of 4 family members were analyzed by sequencing. An average sequencing depth of more than 172 脳 was obtained, the total number of variants was 112864, and three suspected pathogenic genes (CDH1,SMAD4,TP53) were obtained. Unfortunately, due to the complexity of the family, SMAD4 gene and TP53 gene mutations only exist in some family members, and it is not possible to determine the pathogenicity of the related genes. Four family members co-exist CDH1 gene mutations, but the mutation sites are not conservative and the sequencing depth is low, so there may be errors, and finally no clear pathogenic mutations were found in the family. Conclusion: there is a high proportion of Hp infection in the clinical manifestations of the family members of this family, and the third generation members of the family have atrophy and intestinal metathesis. at present, the most effective method for the prevention and treatment of gastric cancer is to carry out regular correlation examination on the family members of gastric cancer. Most of the common genetic tumor pathogenic genes have been sequenced by gene chip sequencing. It is confirmed that the pathogenic genes in this family may not be 71 kinds of tumor related genes known at present, may be other gastric cancer related genes other than these 71 genes, or may be a kind of gastric cancer related pathogenic genes which have not been found at present. Through the second generation sequencing, it is found that many new SNPs and Indels, reveal that the second generation sequencing gene detection technology plays a more and more important role in the clinical diagnosis and molecular diagnosis of gastric cancer, makes up for the deficiency of traditional genetic counseling model, provides more effective help for patients with family history of gastric cancer, and provides help for early detection and early treatment of gastric cancer.
【學(xué)位授予單位】:蘭州大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類(lèi)號(hào)】:R735.2
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