Background Heat shock protein 70 （HSP70） is expressed highly in epithelial tumours associated closely with human papillomavirus 16 （HPV16） infections. However, evidence about the direct relationship between HSP70 ...Background Heat shock protein 70 （HSP70） is expressed highly in epithelial tumours associated closely with human papillomavirus 16 （HPV16） infections. However, evidence about the direct relationship between HSP70 expression and HPVs infections are still lacking. In the present study, we examined the expression of HSP70 in keratinocytes introduced with HPV16 E6/E7 oncogenes. Methods Stable transfected cells were established by transfection of the plasmids pLXSN16E6/E7 into cultured primary keratinocytes and subsequently selected by plasmid specific selection antibiotic （G418） at the required concentration. The expression of HSP70 in pLXSN16E6/E7 transfected keratinocytes was determined by Western blot. The correlation of HSP70 expression and E6/E7 transfeetion was further confirmed by doubly labelled immunofluorescent staining. Results Compared to non-transfected keratinocytes, there was a significant trend for higher levels of HSP70 in pLXSN16E6/E7 transfected keratinocytes. Doubly labelled immunofluorescent staining experiment showed that the co-localization of HPV16 E6/E7 and HSP70 in transfeeted keratinoeytes was observed and increased expression of HSP70 was strongly associated with the transfection of HPV16 E6/E7. Conclusions Our studies demonstrated increased levels of HSP70 proteins in keratinocytes stably transfected by HPV16 E6/E7 oncogenes. It suggests that the expression of HSP70 is modulated by HPV16 E6/E7 proteins, which may be involved in HPV16 E6/E7 induced immortalization.展开更多
目的:通过检测MCM7和HPV在上颌窦鳞癌(squamous cell carcinoma of the maxillary sinus,MSSCC)中的表达,探讨其在MSSCC发病机制中的作用及临床意义。方法:采用免疫组织化学方法检测MSSCC(实验组)、癌旁组织(癌旁组)和下鼻甲黏膜组织(...目的:通过检测MCM7和HPV在上颌窦鳞癌(squamous cell carcinoma of the maxillary sinus,MSSCC)中的表达,探讨其在MSSCC发病机制中的作用及临床意义。方法:采用免疫组织化学方法检测MSSCC(实验组)、癌旁组织(癌旁组)和下鼻甲黏膜组织(对照组)中的MCM7及HPV的表达,应用SPSS 22.0软件包对数据进行统计学分析。结果:(1)MCM7在癌旁组和对照组上皮中大部分位于基底层,而其在MSSCC中呈弥散分布。MCM7在对照组(P=0.000)、癌旁组(P=0.000)和实验组(P=0.000)中的表达水平逐渐增高。(2)MCM7的表达仅与肿瘤分化程度有关(P=0.030),并且随着分化程度的下降,MCM7的表达水平逐渐增高。(3)伴HPV感染的细胞无论在对照组、癌旁组或实验组中分布均无明显规律。HPV在对照组、癌旁组及实验组患者中的感染率分别为40.00%(4/10)、95.65%(22/23)和78.57%(33/42)。(4)HPV感染与颈淋巴结转移有关(P=0.015),而与患者性别(P=1.000)、年龄(P=0.332)、吸烟(P=0.536)、临床分期(P=0.806)及肿瘤分化程度(P=0.489)无关。(5)在实验组中,伴HPV感染者,MCM7表达水平显著高于未感染者(P=0.007),且呈正相关关系(rs=0.317,P=0.041)。结论:MCM7和HPV可能与MSSCC的发生、发展有关,可能对患者的临床治疗及预后判断具有重要指导意义;MCM7异常表达可作为筛查HPV感染病例的良好临床病理学指标。展开更多
基金This work was supported by a grant from the National NaturalScience Foundation of China (No.39570656)
文摘Background Heat shock protein 70 （HSP70） is expressed highly in epithelial tumours associated closely with human papillomavirus 16 （HPV16） infections. However, evidence about the direct relationship between HSP70 expression and HPVs infections are still lacking. In the present study, we examined the expression of HSP70 in keratinocytes introduced with HPV16 E6/E7 oncogenes. Methods Stable transfected cells were established by transfection of the plasmids pLXSN16E6/E7 into cultured primary keratinocytes and subsequently selected by plasmid specific selection antibiotic （G418） at the required concentration. The expression of HSP70 in pLXSN16E6/E7 transfected keratinocytes was determined by Western blot. The correlation of HSP70 expression and E6/E7 transfeetion was further confirmed by doubly labelled immunofluorescent staining. Results Compared to non-transfected keratinocytes, there was a significant trend for higher levels of HSP70 in pLXSN16E6/E7 transfected keratinocytes. Doubly labelled immunofluorescent staining experiment showed that the co-localization of HPV16 E6/E7 and HSP70 in transfeeted keratinoeytes was observed and increased expression of HSP70 was strongly associated with the transfection of HPV16 E6/E7. Conclusions Our studies demonstrated increased levels of HSP70 proteins in keratinocytes stably transfected by HPV16 E6/E7 oncogenes. It suggests that the expression of HSP70 is modulated by HPV16 E6/E7 proteins, which may be involved in HPV16 E6/E7 induced immortalization.
文摘目的:通过检测MCM7和HPV在上颌窦鳞癌(squamous cell carcinoma of the maxillary sinus,MSSCC)中的表达,探讨其在MSSCC发病机制中的作用及临床意义。方法:采用免疫组织化学方法检测MSSCC(实验组)、癌旁组织(癌旁组)和下鼻甲黏膜组织(对照组)中的MCM7及HPV的表达,应用SPSS 22.0软件包对数据进行统计学分析。结果:(1)MCM7在癌旁组和对照组上皮中大部分位于基底层,而其在MSSCC中呈弥散分布。MCM7在对照组(P=0.000)、癌旁组(P=0.000)和实验组(P=0.000)中的表达水平逐渐增高。(2)MCM7的表达仅与肿瘤分化程度有关(P=0.030),并且随着分化程度的下降,MCM7的表达水平逐渐增高。(3)伴HPV感染的细胞无论在对照组、癌旁组或实验组中分布均无明显规律。HPV在对照组、癌旁组及实验组患者中的感染率分别为40.00%(4/10)、95.65%(22/23)和78.57%(33/42)。(4)HPV感染与颈淋巴结转移有关(P=0.015),而与患者性别(P=1.000)、年龄(P=0.332)、吸烟(P=0.536)、临床分期(P=0.806)及肿瘤分化程度(P=0.489)无关。(5)在实验组中,伴HPV感染者,MCM7表达水平显著高于未感染者(P=0.007),且呈正相关关系(rs=0.317,P=0.041)。结论:MCM7和HPV可能与MSSCC的发生、发展有关,可能对患者的临床治疗及预后判断具有重要指导意义;MCM7异常表达可作为筛查HPV感染病例的良好临床病理学指标。
