人类疱疹病毒6型与口腔鳞癌发生的相关性研究及临床意义

目的研究人类疱疹病毒6型(HHV-6)感染与口腔鳞癌发生的相关性及其临床意义。方法运用巢式PCR技术,检测82例口腔鳞癌、25例癌前病变及40例正常对照人群唾液、血液、组织中HHV-6感染情况。结果正常对照组、癌前病变组、鳞癌组HHV-6在唾液中的检出率分别为45.0%、56.0%、72.0%,在血液中的检出率分别为22.5%、48.0%、57.3%,总阳性率为47.5%、56.0%、80.5%,趋势差异均具统计学意义(P<0.05);3组HHV-6检出率唾液普遍高于血液,在正常组和鳞癌组中差异具统计学意义(P<0.05)。鳞癌组癌组织中HHV-6检出率(78.95%)显著大于癌旁正常组织(10.53%),具统计学意义(P<0.01);随着鳞癌分化程度的降低,HHV-6的阳性率有下降的趋势,但无统计学差异(P>0.05)。结论唾液腺是HHV-6长期潜伏和增殖的部位,唾液是其主要的传播媒介;HHV-6的激活/再感染发生在黏膜病变的早期,其感染与口腔鳞癌的发生存在相关性,可能直接参与了细胞癌变的过程。

The correlation between human herpesvirus-6 and pathogenesis of oral squamous cell carcinoma

Objective:To investigate the correlation between human herpesvirus-6(HHV-6) infection and pathogenesis of oral squamous cell carcinoma.Methods:Samples of saliva, peripheral blood mononuclear cells (PBMCs),tumor tissue and tumor adjacent tissue were collected from 82 patients with oral squamous cell carcinoma, 25 patients with oral precancer lesion and 40 healthy young adults(controls). Nested PCR assay was used to examine HHV-6 infection.Results:1)In control, precancer lesion and carcinoma groups, HHV-6 positive rates(%) were 45.0,56.0, 72.0 in saliva, 22.5,48.0,57.3 in PBMCs, and general rates(%) were 47.5,56.0 and 80.5 respectively(control vs carcinoma,P<0.05); 2) HHV-6 DNA positive rates in saliva were higher than those in PBMCs(control vs carcinoma,P<0.05). In carcinoma group the positive rate in cancer tissue (78.9%) was significantly higher than that in tumor adjacent tissues(10.5%)(P<0.01); 3) With the decrease of carcinoma differentiation level,HHV-6 positive rates showed a descending tendency while exited no statistical difference (P>0.05).Conclusions:Saliva gland is the position of HHV-6 latency/proliferation and saliva is the predominant route of HHV-6 transmission; HHV-6 infection correlates to the pathogenesis of oral squamous cell carcinoma.