血浆环状RNA_0002867对HBV相关性肝癌诊断价值的初步研究

目的 探讨血浆环状RNA_0002867（circ_0002867）对HBV相关性肝细胞癌（肝癌）的诊断价值。 方法 分析已发表的测序结果,筛选在肝癌患者的组织和血浆中同时高表达的环状RNA,通过微滴数字PCR（ddPCR）检测35例HBV相关性肝癌患者（肝癌组）及30例HBV相关性肝硬化患者（肝硬化组）血浆circ_0002867表达水平,电化学发光法检测2组患者的血清甲胎蛋白水平,应用受试者工作特征（ROC）曲线分析血浆circ_0002867、血清甲胎蛋白及两者联合对HBV相关性肝癌的诊断价值。 结果 在肝癌患者的组织和血浆中同时高表达的环状RNA中取交集筛选出circ_0002867行进一步验证。肝癌组血浆circ_0002867表达水平为（29.63±11.56）copies/ml,高于肝硬化组的（19.15±11.57）copies/ml（P < 0.001）;血浆circ_0002867、血清甲胎蛋白及两者联合诊断HBV相关性肝癌的ROC曲线下面积分别为0.725（95% CI 0.600~0.828）、0.670 （95% CI 0.542~0.781）、0.810（95%CI 0.693~0.896）,血浆circ_0002867和血清甲胎蛋白两者联合提高了血清甲胎蛋白诊断HBV相关性肝癌的效能（P < 0.05）。 结论 血浆circ_0002867联合血清甲胎蛋白对诊断HBV相关性肝癌具有较好的临床价值。

Plasma circular RNA_0002867 as a diagnostic biomarker for hepatitis B virus-related hepatocellular carcinoma

Objective To investigate the diagnostic value of plasma circular RNA_0002867 （circ_0002867） for hepatitis B virus （HBV）-related hepatocellular carcinoma （HCC）. Methods The published sequencing results were analyzed to screen the high expression of circular RNAs in both tissues and plasma of HCC patients. The expression levels of plasma circ_0002867 were detected by digital droplet polymerase chain reaction （ddPCR） in 35 patients with HBV-related HCC and 30 patients with HBV-related liver cirrhosis. The serum alpha-fetoprotein （AFP） levels were determined by electrochemiluminescence in two groups. The receiver operating characteristic （ROC） curve was delineated to analyze diagnostic values of plasma circ_0002867, serum AFP and these two combined for HCC. Results The circ_0002867, which was highly expressed in both tissues and plasma of HCC patients, was screened for subsequent validation. The expression level of plasma circ_0002867 in the HBV-related liver cirrhosis group was significantly lower than that in the HBV-related HCC group （（19.15±11.57） copies/ml vs. （29.63±11.56） copies/ml; P < 0.001））. The area under ROC for plasma circ_0002867, serum AFP, and these two combined was 0.725 （95% CI 0.600-0.828）, 0.670 （95% CI 0.542-0.781） and 0.810 （95% CI 0.693-0.896）, respectively. The combination of serum AFP and plasma circ_0002867 significantly improved the diagnostic accuracy of serum AFP for HBV-related HCC （P < 0.05）. Conclusion Plasma circ_0002867 combined with serum AFP is a potential diagnostic biomarker for HBV-related HCC in clinical practice.