AIM To find out the relationship between the gene transcription of different types ofprocollagen and the deposition of the relevant collagens in the liver tissue and to confirm the types of collagen producing cells in...AIM To find out the relationship between the gene transcription of different types ofprocollagen and the deposition of the relevant collagens in the liver tissue and to confirm the types of collagen producing cells in liverfibrogenesis.METHODS Dynamic changes of the expression of α1(Ⅰ ), α1 (Ⅲ ) and α1 (Ⅳ) procollagen mRNAand relevant collagens and the distribution ofcollagen producing cells during liver fibrogenesis of rat induced by CCl4 (20 weeks)were investigated with Northern blot analysis,in situ hybridization and immunohistochemicaltechniques.RESULTS The increased expression of α1 (Ⅲ)procollagen mRNA by Northern blot analysis was the most predominant one among the threemRNAs during fibrogenesis. However, theenhanced expression of al (Ⅳ) procollagenmRNA occurred very early while the expressionof α1 (Ⅰ) mRNA was not enhanced much until themiddle stage of the exPeriment. D6smin (Dm)positive hepatic stellate cells (HSCs) and fewmyofibroblasts (MFs) in and around the necrotic areas expressed α1 (Ⅰ), α1 (Ⅲ) and α1 (Ⅳ)procollagen mRNA signals detected by in situhybridization at the early stage of theexperiment. All the three procollagen mRNAsignals thereafter mainly localized in fibroblasts (Fbs) and MFs in fibrotic septa during the middle and late stages of fibrosis, which distributedparallel to the corresponding collagens detected by immunohistochemical study. ln addition, the endothelial cells of sinusoids and the small blood vessels within the septa also showed α1(Ⅳ) procollagen mRNA and type Ⅳ collagen expressionCONCLUSION It is considered that "HSC-MF-Fb" effect cell system is the major cellularsource of collagen production in liver fibrosis, in which HSCs are collagen producing precursor cells in the early liver fibrogenesis, thereafter the synthesis of type Ⅰ, Ⅲ and Ⅳ collagens (Col Ⅰ, Col Ⅲ and Col Ⅳ) mainly derives fromMFs and Fbs, which play a very important role in the progress of liver fibrosis. The endothelialcells along sinusoids, as another source of Col 展开更多
用光敏生物素标记的柯萨奇 B_3病毒 cDNA 探针,与云南病区20例经临床和病理检查确诊为亚急型克山病的心肌组织切片进行原位核酸杂交,以检测柯萨奇 B 组病毒 RNA。结果有18例出现阳性杂交信号,阳性率达90%。说明云南亚急型克山病心肌组...用光敏生物素标记的柯萨奇 B_3病毒 cDNA 探针,与云南病区20例经临床和病理检查确诊为亚急型克山病的心肌组织切片进行原位核酸杂交,以检测柯萨奇 B 组病毒 RNA。结果有18例出现阳性杂交信号,阳性率达90%。说明云南亚急型克山病心肌组织中有柯萨奇 B 组病毒 RNA 的存在。提示云南亚急型克山病的发生与柯萨奇 B 组病毒的持续感染密切相关。展开更多
目的外耳道乳头状瘤(papilloma of the external auditory canal,PEAC)发病率占外耳道良性肿瘤的第1位。文中探讨人乳头瘤病毒(human papilloma virus,HPV)在PEAC发病中的作用及HPV检测在PEAC中的意义。方法观察45例PEAC中挖空细胞及异...目的外耳道乳头状瘤(papilloma of the external auditory canal,PEAC)发病率占外耳道良性肿瘤的第1位。文中探讨人乳头瘤病毒(human papilloma virus,HPV)在PEAC发病中的作用及HPV检测在PEAC中的意义。方法观察45例PEAC中挖空细胞及异型增生的组织形态学变化,并采用原位杂交技术分别检测HPV低危型(6/11)DNA,HPV高危型(16/18)DNA。结果PEAC不伴挖空细胞、PEAC伴挖空细胞、PEAC伴挖空细胞同时伴异型增生组织中HPV低危型(6/11)DNA感染率分别为16.7%、80.6%、66.7%,三者间差异有统计学意义(P<0.05);HPV高危型(16/18)DNA感染率分别为0%、16.7%、66.7%,三者间差异有统计学意义(P<0.05)。HPV低危型(6/11)DNA的检出率与性别有关(P<0.05)。结论HPV感染是PEAC致病的重要因素,积极开展抗HPV感染的治疗对减低PEAC的发病,防止其复发及癌变均具有重要的意义。展开更多
基金supported by National Natural Science Foundation of China(No.3933140)Shanghai Municipal Education Commission(No.980802).
文摘AIM To find out the relationship between the gene transcription of different types ofprocollagen and the deposition of the relevant collagens in the liver tissue and to confirm the types of collagen producing cells in liverfibrogenesis.METHODS Dynamic changes of the expression of α1(Ⅰ ), α1 (Ⅲ ) and α1 (Ⅳ) procollagen mRNAand relevant collagens and the distribution ofcollagen producing cells during liver fibrogenesis of rat induced by CCl4 (20 weeks)were investigated with Northern blot analysis,in situ hybridization and immunohistochemicaltechniques.RESULTS The increased expression of α1 (Ⅲ)procollagen mRNA by Northern blot analysis was the most predominant one among the threemRNAs during fibrogenesis. However, theenhanced expression of al (Ⅳ) procollagenmRNA occurred very early while the expressionof α1 (Ⅰ) mRNA was not enhanced much until themiddle stage of the exPeriment. D6smin (Dm)positive hepatic stellate cells (HSCs) and fewmyofibroblasts (MFs) in and around the necrotic areas expressed α1 (Ⅰ), α1 (Ⅲ) and α1 (Ⅳ)procollagen mRNA signals detected by in situhybridization at the early stage of theexperiment. All the three procollagen mRNAsignals thereafter mainly localized in fibroblasts (Fbs) and MFs in fibrotic septa during the middle and late stages of fibrosis, which distributedparallel to the corresponding collagens detected by immunohistochemical study. ln addition, the endothelial cells of sinusoids and the small blood vessels within the septa also showed α1(Ⅳ) procollagen mRNA and type Ⅳ collagen expressionCONCLUSION It is considered that "HSC-MF-Fb" effect cell system is the major cellularsource of collagen production in liver fibrosis, in which HSCs are collagen producing precursor cells in the early liver fibrogenesis, thereafter the synthesis of type Ⅰ, Ⅲ and Ⅳ collagens (Col Ⅰ, Col Ⅲ and Col Ⅳ) mainly derives fromMFs and Fbs, which play a very important role in the progress of liver fibrosis. The endothelialcells along sinusoids, as another source of Col
文摘用光敏生物素标记的柯萨奇 B_3病毒 cDNA 探针,与云南病区20例经临床和病理检查确诊为亚急型克山病的心肌组织切片进行原位核酸杂交,以检测柯萨奇 B 组病毒 RNA。结果有18例出现阳性杂交信号,阳性率达90%。说明云南亚急型克山病心肌组织中有柯萨奇 B 组病毒 RNA 的存在。提示云南亚急型克山病的发生与柯萨奇 B 组病毒的持续感染密切相关。
文摘目的外耳道乳头状瘤(papilloma of the external auditory canal,PEAC)发病率占外耳道良性肿瘤的第1位。文中探讨人乳头瘤病毒(human papilloma virus,HPV)在PEAC发病中的作用及HPV检测在PEAC中的意义。方法观察45例PEAC中挖空细胞及异型增生的组织形态学变化,并采用原位杂交技术分别检测HPV低危型(6/11)DNA,HPV高危型(16/18)DNA。结果PEAC不伴挖空细胞、PEAC伴挖空细胞、PEAC伴挖空细胞同时伴异型增生组织中HPV低危型(6/11)DNA感染率分别为16.7%、80.6%、66.7%,三者间差异有统计学意义(P<0.05);HPV高危型(16/18)DNA感染率分别为0%、16.7%、66.7%,三者间差异有统计学意义(P<0.05)。HPV低危型(6/11)DNA的检出率与性别有关(P<0.05)。结论HPV感染是PEAC致病的重要因素,积极开展抗HPV感染的治疗对减低PEAC的发病,防止其复发及癌变均具有重要的意义。
