目的探讨乙型肝炎病毒(hepatitis B virus,HBV)在胚胎卵裂球细胞中的整合情况,并探索卵裂球细胞的活组织检查用于阻断HBV垂直传播的可行性。方法体外受精的患者共43对夫妇,依据HBV感染情况分为三组:A组18对夫妇(丈夫HBsAg阳性或HBeAg阳性,妻子HBsAg阴性且抗-HBs阳性);B组20对夫妇(夫妻双方HBsAg、HBeAg均为阳性);C组5对夫妇,为对照组(夫妻双方均无HBV感染)。活检体外受精的胚胎,应用荧光原位杂交技术检测HBV在胚胎卵裂球细胞的整合情况。结果荧光原位杂交结果显示,在子代胚胎卵裂球细胞,A组有2例检测到HBV的整合,B组有9例检测到HBV的整合,C组均未观测到HBV整合。与A组比较,B组HBV在胚胎卵裂球细胞整合率明显升高(P<0.05)。B组中部分卵裂球细胞为多拷贝整合,在来自HBV感染的同一个胚胎的卵裂球细胞,HBV整合只出现在部分细胞。结论HBV可整合于胚胎卵裂球细胞。HBsAg和HBeAg均为阳性的夫妇的后代胚胎易于发生HBV整合。
Objective To study the hepatitis B virus （HBV） vertical transmission via infected spermatozoa. Methods Eighteen male patients with HBV infection who underwent in vitro fertilization （IVF） were studied, 5 HBV negative patients were selected as the control. Fluorescence in situ hybridization （FISH） analysis using the partial-length HBV DNA as the hybridization probe was performed to explore the existence of HBV DNA in the sperm and in the host embryonic genome. Results FISH showed that 5 of 18 patients＇ sperm presented positive signals and 2 of 18 embryos presented positive signals, while no positive signals were found in control group. Conclusion The HBV DNA was found in human sperm and embryos of HBV patients. These results provide direct evidence that HBV DNA could transmit to foetus via human infected spermatozoa.
