慢性肝脏疾病患者肝组织中螺杆菌相关基因16SrRNA的检测

Detection of Helicobacter species related genes coding for 16S rRNA in the liver tissue of patients with chronic liver disease

目的对慢性肝脏疾病患者肝组织中螺杆菌(Hp)基因16SrRNA进行检测,了解慢性肝脏疾病患者肝组织中Hp感染状况,进一步揭示Hp感染与慢性肝脏疾病的关系。方法(1)收集肝穿活检和手术治疗肝脏组织标本,其中正常人、慢性肝炎、肝硬化、肝癌患者肝组织各30例,经病理证实。(2)应用PCR扩增Hp16SrRNA基因及测定序列。结果肝组织16SrRNA基因PCR扩增产物经1%琼脂糖凝胶电泳,于紫外检测仪下均可见16SrRNA基因阳性扩增带为109bp;18例原发性肝癌标本检出Hp16SrRNA基因,阳性率60.0%;14例肝硬化标本检出检出Hp16SrRNA基因,阳性率47%;正常人、慢性肝炎组均无检出检出Hp16SrRNA基因。肝组织螺杆菌16SrRNA测序对比分析,与Hp16SrRNA片段的基因有98.8%同源性。结论慢性肝脏疾病患者肝组织中存在Hp,Hp感染与肝癌可能存在相关性。

Objective To investigate the infection of Helicobacter pylori （Hp） in the liver tissue of patients with chronic liver disease and the association between Hp and chronic liver disease. Methods Liver tissue samples were obtained by liver biopsy and surgical resection from 30 healthy subjects, 30 patients with chronic hepatitis, 30 with cirrhosis and 30 with liver cancer. All the samples were confirmed by pathological examination. The gene fragment coding for 16SrRNA were amplified by PCR with sequence analysis. Results The PCR product of the 16SrRNA gene was 109 bp in length. Hp 16SrRNA was detected in 18 out of 30 liver biopsy samples from patients with primary cancer （60.0%）, in 14 samples from patients with liver cirrhosis （47.0%）, and in none of the samples from normal subjects or patients with chronic hepatitis. Sequencing analysis of Hp 16SrRNA gene in the liver tissue showed a 98.8% homology with the gene fragment encoding Hp 16SrRNA. Conclusion Hp is identified in the liver tissue of patients with chronic liver disease, suggesting the possible correlation between Hp infection and hepatocellular carcinoma.