RELATIONSHIP BETWEEN CYCLIN G1 AND HUMAN PAPILLOMA VIRUS INFECTION IN CERVICAL INTRAEPITHELIAL NEOPLASIA AND CERVICAL CARCINOMA

Objective To evaluate the overexpression of cyclin G1 in cervical intraepithelial neoplasia （CIN） and cervical carcinoma, and the correlation between cyclin G1 and high-risk human papilloma virus （HPV） infection. Methods All of the specimens were obtained from the Department of Pathology of China-Japan Friendship Hospital from January 2000 to August 2004. We detected the expression of cyclin G1 with immunohistochemistry, HPV16/18 infection with in situ hybridization, and high-risk HPV infection with Hybrid capture system Ⅱ （HC-Ⅱ） in normal group （25 cases）, CIN Ⅰ （48 cases）, CIN Ⅱ （56 cases）, CIN Ⅲ（54 cases）, and invasive cervical squamous-cell carcinoma （SCC, 31 cases）. Results The positive rates of cyclin G1 expression in CIN（77.85% ）and SCC cervical tissues （87. 10% ） were significantly higher than normal （ 8.00%, P 〈 0. 01 ）, and the intensities of cyclin G1 expression in CIN（40. 60% ） and SCC cervical tissues （61.51%） were significantly higher than normal （2. 72%, P 〈0.05）. The positive rates and intensities of cyclin G1 expression increased gradually with the grade of cervical lesions. High-risk HPV infection rates were higher in CIN and SCC than normal groups （P 〈 0.05 ）. There was a positive correlation between cyclin G1 expression and high-risk HPV infection detected with HC-Ⅱ （Kendall＇s tau-b =0. 316, 0. 269, 0. 352, and 0. 474 in CIN Ⅰ, CIN Ⅱ, CIN Ⅲ, and SCC, respectively, P 〈 0. 05 ）. Conclusions Cyclin G1 is overexpressed in CIN and SCC. Cyclin G1 may be a biomarker for detecting CIN and SCC. Cyclin G1 may play an important role in the oncogenesis of CIN and SCC by high-risk HPV infection.

水中肠道食源性病毒的多重RT-PCR检测法

目的建立能同时检测水环境中肠道病毒(Enterovirus,EVs)、诺如病毒GⅡ(Norovorus,Nov GⅡ)、轮状病毒(Rotavirus,RVs)、腺病毒(Adenovirus,AdVs)的多重RT-PCR检测方法。方法根据GenBank收录的肠道食源性病毒核酸序列,利用软件DNAMAN设计肠道病毒通用引物以及Nov GⅡ、RVs、AdVs的特异性引物;将这4对引物置于同一体系中进行多重RT-PCR,利用各种肠道食源性病毒的核酸模板检测其特异性并通过不同滴度[100～107pfu(copies)/ml]病毒测试其灵敏度;利用加标实验验证该方法的准确性;通过对5份河水或某水厂出水大体积水样(50 L)进行病毒富集与检测,以确定该方法的实用性,同时,采用传统细胞培养法验证其结果。结果该方法对目的病毒均获得了理想的电泳条带,而对其他病毒无非特异扩增;对EVs、AdVs的最低检出滴度均为10 pfu/ml,Nov GⅡ-4为10 copies/ml,对RVs的最低检出滴度为102pfu/ml;加标实验检测结果准确率为100%;对5份河水或某水厂出水大体积水样进行病毒富集与检测,对以上各种病毒均有检出且与细胞培养结果一致。结论该方法不仅特异性强、灵敏度高、简便快捷,而且准确率高,实际应用性强,适用于水中肠道食源性病毒的快速检测。

诺瓦克样病毒实时荧光定量PCR检测方法研究

目的建立贝类中GⅡ型诺瓦克样病毒的实时荧光定量PCR检测方法。方法针对GⅡ型诺瓦克样病毒保守序列，设计出简并引物与探针，建立GⅡ型诺瓦克样病毒实时荧光定量PCR检测方法。并用该方法和常规PCR法对127份贝类标本进行检测。结果研究方法对GⅡ型诺瓦克样病毒检测准确和重复性好，灵敏度为10拷贝。标准曲线的线性范围为10^1～10^5拷贝，相关系数为0．9986，并且对贝类标本的检出率显著高于常规PCR。结论本研究建立了GⅡ型诺瓦克样病毒的实时荧光定量PCR检测方法，可用于贝类中GⅡ型诺瓦克样病毒污染状况及其突发事件的快速定量检测。