Objective： To explore the relationship between microsatellite alterations of RASSFIA gene and the development of cervical carcinoma, and its relationship with HPV16 infection. Methods： Two sites of microsatellite po...Objective： To explore the relationship between microsatellite alterations of RASSFIA gene and the development of cervical carcinoma, and its relationship with HPV16 infection. Methods： Two sites of microsatellite polymorphism of RASSFIA gene were selected. Polymerase chain reaction （PCR） technique was used to detect LOH and MSI in 50 cases of cervical carcinoma and 40 cases of cervical intraepithelial neoplasia （CIN）, and to detect the infection state of HPV16. Results： At D3S1478 and D3S4604, the LOH rates of cervical carcinomas were 32.6% （14/43） and 48.9% （23/47）, the MSI rates were 14% （6/43） and 19.1% （9/47）, respectively. The LOH rates of CINs were 31.4% （11/35） and 39.5% （15/38）, the MSI rates were 11.4% （4/35） and 15.8% （6/38）, respectively. There were no significant differences between cervical carcinomas and CINs in respect to their positive rates of LOH and MSI at D3S1478 and D3S4604 （P〉0.05）. There were significant differences in LOH rates at D3S1478 and D3S4604 between the stage Ⅰ-Ⅱ and Ⅲ-Ⅳ cervical carcinomas and between the well/moderately differentiated cervical carcinomas and the poorly differentiated cervical carcinomas （P〈0.05）. The positive rates of LOH and MSI for CIN Ⅲ and noninvasive cervical carcinomas were higher than those in CIN Ⅰ-Ⅱ. The rates of infection of HPV16 in cervical cancer was obviously higher than that in CIN and in normal cervical tissues （P〈0.05）, and the incidence of LOH of RASSFIA gene was higher in HPV16（＋） than that in HPV16（-） （P〈0.05）. Conclusion： The RASSFIA gene change is a relatively late event in cervical carcinomas. The detection of LOH and MSI of RASSFIA gene might be helpful to the early diagnosis and the screening of cervical carcinoma. It might also be useful for predicting the prognosis of cervical carcinoma.展开更多
Objective: The role of human papillomavirus (HPV) in the development of cervical carcinoma has been clearly established but other factors could be involved in cervical tumorigenesis such as loss of heterozygosity (LOH...Objective: The role of human papillomavirus (HPV) in the development of cervical carcinoma has been clearly established but other factors could be involved in cervical tumorigenesis such as loss of heterozygosity (LOH) and microsatellite instability (MI). The aim of the present study was to investigate the genetic instability in cervical carcinoma tissues and provide evidence for discovering new tumor suppressor genes and screening diagnostic molecular marker of cervical carcinoma. Methods: Fifty primary cervical carcinoma samples from high-incidence area were analyzed by PCR for HPV16 infection, LOH and microsatellite instability. Results: HPV16 was detected in 88% of the cases. Sixty-six percent of total cases showed LOH with no more than 3 different loci per case. The highest frequency of the allelic loss was found in D18S474 (18q21, 40.5%). MI was detected in 4 cases (8%) only. Conclusion: Different percentages of LOH on specific chromosomal regions were found and MI was very infrequent in cervical carcinoma. The putative suppressor gene(s) could be located on specific chromosome regions such as 18q, and genetic instability could be involved in cervical tumorigenesis.展开更多
目的探讨维吾尔族妇女宫颈上皮内瘤变(CIN)Ⅰ～Ⅲ级和子宫颈癌组织中miRNA-21的表达情况,并分析子宫颈癌中miRNA-21与人乳头瘤病毒(HPV)感染的关系。方法应用荧光定量RT-PCR技术和原位杂交技术检测维吾尔族妇女子宫颈鳞状细胞癌、CINⅠ...目的探讨维吾尔族妇女宫颈上皮内瘤变(CIN)Ⅰ～Ⅲ级和子宫颈癌组织中miRNA-21的表达情况,并分析子宫颈癌中miRNA-21与人乳头瘤病毒(HPV)感染的关系。方法应用荧光定量RT-PCR技术和原位杂交技术检测维吾尔族妇女子宫颈鳞状细胞癌、CINⅠ～Ⅲ级病变组织中miRNA-21的表达情况,并对子宫颈鳞状细胞癌中miRNA-21与HPV感染情况进行相关性分析。结果 miRNA-21在宫颈鳞状细胞癌组织、CINⅢ级、Ⅰ和Ⅱ级病变组织中的相对表达量分别是8.19±1.96,5.19±1.75,3.78±0.81。在HPV16阳性和阴性病变中miRNA-21表达存在明显的统计学差异(4.62±0.74 vs 3.57±0.70,P=0.014)。结论 miRNA-21在子宫颈癌前病变以及维吾尔族妇女子宫颈鳞状细胞癌的发生、发展中起重要作用,并且与高危型HPV16感染相关联,因此,miRNA-21可被作为子宫颈鳞状细胞癌的早期筛查及早期诊断的分子指标之一。展开更多
目的探讨宫颈癌染色体3p14区域D3S1300、D3S1600位点微卫星不稳定性(microsatellite instability,MSl)及等位基因杂合性缺失(loss of heterozygosity,LOH)频率,为准确定位宫颈癌相关肿瘤抑制基因位点提供实验依据,并探讨LOH及MSI与宫颈...目的探讨宫颈癌染色体3p14区域D3S1300、D3S1600位点微卫星不稳定性(microsatellite instability,MSl)及等位基因杂合性缺失(loss of heterozygosity,LOH)频率,为准确定位宫颈癌相关肿瘤抑制基因位点提供实验依据,并探讨LOH及MSI与宫颈癌临床分期、病理分级的相关性。方法选择3p14区域两个微卫星多态性位点,显微分离提取41例宫颈癌石蜡切片中的正常组织和肿瘤组织,经PCR扩增及聚丙烯酰胺凝胶电泳和硝酸银染色,进行LOH及MSI研究。结果41例样本中有25例至少存在一个位点的LOH,D3S1300位点LOH的频率为35%,D3S1600位点LOH的频率为28%。MSI发生频率相对较低,D3S1300的MSI频率为7.5%,D3S1600的MSI频率为12.8%。D3S1300、D3S1600位点LOH的发生率与临床分期、病理分级相关性有显著意义(P<0.05),而MSI与之无显著的差别(P>0.05)。结论3p14区域内D3S1300、D3S1600位点具有较高的LOH,提示这两个微卫星位点附近可能存在尚未克隆的与宫颈癌发生、发展相关的肿瘤抑制基因。宫颈癌染色体3p14区域LOH与临床分期、病理分级成正相关,提示检测该区域的LOH可作为病程进展及预后的重要参考指标。MSI在本研究中与宫颈癌临床分期、病理分级无明显相关。展开更多
文摘Objective： To explore the relationship between microsatellite alterations of RASSFIA gene and the development of cervical carcinoma, and its relationship with HPV16 infection. Methods： Two sites of microsatellite polymorphism of RASSFIA gene were selected. Polymerase chain reaction （PCR） technique was used to detect LOH and MSI in 50 cases of cervical carcinoma and 40 cases of cervical intraepithelial neoplasia （CIN）, and to detect the infection state of HPV16. Results： At D3S1478 and D3S4604, the LOH rates of cervical carcinomas were 32.6% （14/43） and 48.9% （23/47）, the MSI rates were 14% （6/43） and 19.1% （9/47）, respectively. The LOH rates of CINs were 31.4% （11/35） and 39.5% （15/38）, the MSI rates were 11.4% （4/35） and 15.8% （6/38）, respectively. There were no significant differences between cervical carcinomas and CINs in respect to their positive rates of LOH and MSI at D3S1478 and D3S4604 （P〉0.05）. There were significant differences in LOH rates at D3S1478 and D3S4604 between the stage Ⅰ-Ⅱ and Ⅲ-Ⅳ cervical carcinomas and between the well/moderately differentiated cervical carcinomas and the poorly differentiated cervical carcinomas （P〈0.05）. The positive rates of LOH and MSI for CIN Ⅲ and noninvasive cervical carcinomas were higher than those in CIN Ⅰ-Ⅱ. The rates of infection of HPV16 in cervical cancer was obviously higher than that in CIN and in normal cervical tissues （P〈0.05）, and the incidence of LOH of RASSFIA gene was higher in HPV16（＋） than that in HPV16（-） （P〈0.05）. Conclusion： The RASSFIA gene change is a relatively late event in cervical carcinomas. The detection of LOH and MSI of RASSFIA gene might be helpful to the early diagnosis and the screening of cervical carcinoma. It might also be useful for predicting the prognosis of cervical carcinoma.
基金This work was supported by the National Natural Science Foundation of China (No. 301710420).
文摘Objective: The role of human papillomavirus (HPV) in the development of cervical carcinoma has been clearly established but other factors could be involved in cervical tumorigenesis such as loss of heterozygosity (LOH) and microsatellite instability (MI). The aim of the present study was to investigate the genetic instability in cervical carcinoma tissues and provide evidence for discovering new tumor suppressor genes and screening diagnostic molecular marker of cervical carcinoma. Methods: Fifty primary cervical carcinoma samples from high-incidence area were analyzed by PCR for HPV16 infection, LOH and microsatellite instability. Results: HPV16 was detected in 88% of the cases. Sixty-six percent of total cases showed LOH with no more than 3 different loci per case. The highest frequency of the allelic loss was found in D18S474 (18q21, 40.5%). MI was detected in 4 cases (8%) only. Conclusion: Different percentages of LOH on specific chromosomal regions were found and MI was very infrequent in cervical carcinoma. The putative suppressor gene(s) could be located on specific chromosome regions such as 18q, and genetic instability could be involved in cervical tumorigenesis.
文摘目的探讨维吾尔族妇女宫颈上皮内瘤变(CIN)Ⅰ～Ⅲ级和子宫颈癌组织中miRNA-21的表达情况,并分析子宫颈癌中miRNA-21与人乳头瘤病毒(HPV)感染的关系。方法应用荧光定量RT-PCR技术和原位杂交技术检测维吾尔族妇女子宫颈鳞状细胞癌、CINⅠ～Ⅲ级病变组织中miRNA-21的表达情况,并对子宫颈鳞状细胞癌中miRNA-21与HPV感染情况进行相关性分析。结果 miRNA-21在宫颈鳞状细胞癌组织、CINⅢ级、Ⅰ和Ⅱ级病变组织中的相对表达量分别是8.19±1.96,5.19±1.75,3.78±0.81。在HPV16阳性和阴性病变中miRNA-21表达存在明显的统计学差异(4.62±0.74 vs 3.57±0.70,P=0.014)。结论 miRNA-21在子宫颈癌前病变以及维吾尔族妇女子宫颈鳞状细胞癌的发生、发展中起重要作用,并且与高危型HPV16感染相关联,因此,miRNA-21可被作为子宫颈鳞状细胞癌的早期筛查及早期诊断的分子指标之一。
文摘目的探讨宫颈癌染色体3p14区域D3S1300、D3S1600位点微卫星不稳定性(microsatellite instability,MSl)及等位基因杂合性缺失(loss of heterozygosity,LOH)频率,为准确定位宫颈癌相关肿瘤抑制基因位点提供实验依据,并探讨LOH及MSI与宫颈癌临床分期、病理分级的相关性。方法选择3p14区域两个微卫星多态性位点,显微分离提取41例宫颈癌石蜡切片中的正常组织和肿瘤组织,经PCR扩增及聚丙烯酰胺凝胶电泳和硝酸银染色,进行LOH及MSI研究。结果41例样本中有25例至少存在一个位点的LOH,D3S1300位点LOH的频率为35%,D3S1600位点LOH的频率为28%。MSI发生频率相对较低,D3S1300的MSI频率为7.5%,D3S1600的MSI频率为12.8%。D3S1300、D3S1600位点LOH的发生率与临床分期、病理分级相关性有显著意义(P<0.05),而MSI与之无显著的差别(P>0.05)。结论3p14区域内D3S1300、D3S1600位点具有较高的LOH,提示这两个微卫星位点附近可能存在尚未克隆的与宫颈癌发生、发展相关的肿瘤抑制基因。宫颈癌染色体3p14区域LOH与临床分期、病理分级成正相关,提示检测该区域的LOH可作为病程进展及预后的重要参考指标。MSI在本研究中与宫颈癌临床分期、病理分级无明显相关。
