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目的探讨胰岛素受体(INSR)基因变异与2型糖尿病发病的关系。方法采用PCR-SSCP方法对107例2 型糖尿病患者INSR酪氨酸激酶(IRTK)域基因(INSR基因exon 17~21)进行突变筛查,并进一步测序确证。结果检测出13例exon 17静止突变;1例exon 20突变,测序确证为coden 1191 GAC→AAC突变,Adp被Asn代替。结论IRTK域有义突变在中国人2型糖尿病中出现频率较低。Asp1191→Asn变异对IRTK活性的影响及其在2型糖尿病发病 中的作用尚待进一步研究。
Objective To investigate the relationship between insulin receptor (INSR) gene mutation and type 2 diabetes mellitus. Methods Mutations of INSR tyrosine kinase (IRTK) domain gene (INSR gene exon 17-21) in 107 Type 2 diabetic patients were screened by PCR-SSCP and confirmed by sequencing. Results A total of 13 cases of exon 17 mutations were detected. One case of exon 20 mutation was sequenced and confirmed to be coden 1191 GAC → AAC. Adp was replaced by Asn. Conclusions Sense mutations in IRTK domain occur less frequently in Chinese type 2 diabetes mellitus. Asp1191 → Asn mutation on IRTK activity and its role in the pathogenesis of type 2 diabetes remains to be further studied.