癫痫性脑病(epileptic encephalopathy,EE)是以顽固性癫痫发作和脑电活动严重异常为主要特征的一组疾病综合征。儿童期间起病的EE通常还伴有精神运动发育迟缓或倒退。2017年国际抗癫痫联盟(International League Against Epilepsy,ILAE...癫痫性脑病(epileptic encephalopathy,EE)是以顽固性癫痫发作和脑电活动严重异常为主要特征的一组疾病综合征。儿童期间起病的EE通常还伴有精神运动发育迟缓或倒退。2017年国际抗癫痫联盟(International League Against Epilepsy,ILAE)对癫痫分类进行更新,强调使用发育性和癫痫性脑病这一术语,EE用于在癫痫发生前没有发育落后,而且基因突变本身也不会导致发育迟缓的情况,发育性和癫痫性是发挥作用的两个因素[1]。展开更多
目的研究肿瘤抑癌基因DBC2(deletion in breast cancer2)抑制乳腺癌MDA-MB-435S细胞增殖的可能机制。方法野生型DBC2基因的真核表达载体pEBG-DBC2瞬时转染MDA-MB-435S细胞72h,RT-PCR方法证实DBC2基因的过表达;流式细胞术检测DBC2的瞬时...目的研究肿瘤抑癌基因DBC2(deletion in breast cancer2)抑制乳腺癌MDA-MB-435S细胞增殖的可能机制。方法野生型DBC2基因的真核表达载体pEBG-DBC2瞬时转染MDA-MB-435S细胞72h,RT-PCR方法证实DBC2基因的过表达;流式细胞术检测DBC2的瞬时过表达对MDA-MB-435S细胞周期的影响,Western blot检测DBC2的过表达对细胞周期蛋白CyclinD1表达的作用。结果DBC2基因在MDA-MB-435S细胞中瞬时转染72h后,其mR-NA表达水平即可成倍增加,同时DBC2基因的过表达可诱导该乳腺癌细胞周期的G1期阻滞,并随着时间的延长出现细胞凋亡。结论DBC2基因体外抑制乳腺癌细胞生长的功能,可能通过抑制CyclinD1的表达并使细胞停滞于G1期,以及诱导细胞凋亡等机制实现。展开更多
目的检测DBC2在胃癌组织中的表达水平及其基因启动子区的甲基化状态,从而探讨二者的相关性。方法选取92例胃癌组织及其相应的癌旁组织为研究对象,通过RT-PCR方法检测DBC2 m RNA表达水平,并利用MS-PCR方法检测DBC2启动子区的甲基化状态,...目的检测DBC2在胃癌组织中的表达水平及其基因启动子区的甲基化状态,从而探讨二者的相关性。方法选取92例胃癌组织及其相应的癌旁组织为研究对象,通过RT-PCR方法检测DBC2 m RNA表达水平,并利用MS-PCR方法检测DBC2启动子区的甲基化状态,同时分析胃癌组织中DBC2启动子区甲基化水平与临床病理因素的相关性。结果与癌旁组织相比,胃癌组织中DBC2的表达水平降低,同时伴随其启动子区高甲基化。其甲基化水平与肿瘤浸润深度、分化程度及TNM分期密切相关(P<0.05),随着肿瘤浸润深度的增加、分化程度的降低以及TNM分期的提高,胃癌组织中DBC2启动子区具有更明显的甲基化水平。结论胃癌中DBC2启动子区高甲基化可能是导致其表达水平降低的一个重要原因。展开更多
目的探讨乳腺癌缺失基因2(deleted in breast cancer2,DBC2)在三阴性乳腺癌(triple-negative breast cancer,TNBC)中的表达,分析其临床病理学意义。方法收集195例乳腺癌标本,采用免疫组化SP法检测38例TNBC、50例非三阴性乳腺癌(non-trip...目的探讨乳腺癌缺失基因2(deleted in breast cancer2,DBC2)在三阴性乳腺癌(triple-negative breast cancer,TNBC)中的表达,分析其临床病理学意义。方法收集195例乳腺癌标本,采用免疫组化SP法检测38例TNBC、50例非三阴性乳腺癌(non-triple negative breast cancer,NTNBC)和30例正常乳腺组织中DBC2的表达;应用荧光原位杂交技术(fluorescent in situ hybridization,FISH)检测38例TNBC中HER-2基因扩增。结果正常乳腺组织中仅2例DBC2表达缺失(2/30),NTNBC组中21例DBC2表达缺失(21/50);TNBC组中19例DBC2表达缺失(19/38),其表达缺失率高于NTNBC组和正常乳腺组。结论 TNBC中DBC2表达明显缺失,其与肿瘤的增殖和高侵袭性相关,有望成为TNBC靶向治疗的潜在靶点。展开更多
乳腺癌缺失基因2(deleted in breast cancer, DBC2)属于一种抑癌基因,定位于人类染色体8p21,全长20.5Kbp,又名Rhobtb2(rho-related BTB do-main-containing@2),即Ras同源蛋白相关的包含两个BTB结构域的基因2。2002年由Hamaguch...乳腺癌缺失基因2(deleted in breast cancer, DBC2)属于一种抑癌基因,定位于人类染色体8p21,全长20.5Kbp,又名Rhobtb2(rho-related BTB do-main-containing@2),即Ras同源蛋白相关的包含两个BTB结构域的基因2。2002年由Hamaguchi等[1]应用表象差异分析法分离得到。DBC2肿瘤抑制基因是目前与90﹪的散发性,非家族性乳腺癌相关的少数基因之一。现就其研究进展综述如下。展开更多
Objective:The aim of the study was to construct recombinant type 5 adenovirus expressing the human DBC2(deleted in breast cancer 2) gene for in vitro and in vivo assay in human bladder cancer research.Methods:The huma...Objective:The aim of the study was to construct recombinant type 5 adenovirus expressing the human DBC2(deleted in breast cancer 2) gene for in vitro and in vivo assay in human bladder cancer research.Methods:The human DBC2 gene was first subcloned into a shuttle plasmid pAdTrack-CMV.After recombining with pAdEasy-1 vector in BJ5183 cells,the new recombinant vector pAdEasy-DBC2-CMV was transfected into HEK-293 cells to produce adenovirus.The human bladder cancer cell line T24 was infected with DBC2-containing adenovirus particles.Both RNA and protein were collected from cells harvested at 72 h after infection.Real time quantitative PCR(qPCR) and Western blot were used to examine mRNA and protein levels.Fluorescence microscopy was utilized to observe the expression of reporter green fluorescence protein.Results:Electrophoresis showed there was a 2.2 kb size band produced from high fidelity PCR.Pac I digest of the final produced recombinant vector yielded band sizes of approximately 30 kb and 4.5 kb.After virus infection with the pAdEasy-DBC2-CMV vector,the T24 cell line was observed to highly express green fluorescence protein under a fluorescence microscope.qPCR and Western blot assay identified that the DBC2 gene was overexpressed at both the mRNA and protein levels in virus transfected cells.Conclusion:By using the pAdEasy adenovirus system,we successfully constructed an adenovirus that could highly overexpress the tumor suppressor DBC2 gene in a bladder cancer cell line.This viral construct would be widely used for our further research in gene functional assays and gene therapy in bladder cancer.展开更多
癫痫性脑病为癫痫活动本身导致严重认知和行为障碍的疾病,而发育性癫痫性脑病(Developmental and epileptic encephalopathy,DEE)是指病因及癫痫活动共同作用对发育迟缓的影响[1],是一组严重威胁儿童身体健康的神经发育性疾病,其主要临...癫痫性脑病为癫痫活动本身导致严重认知和行为障碍的疾病,而发育性癫痫性脑病(Developmental and epileptic encephalopathy,DEE)是指病因及癫痫活动共同作用对发育迟缓的影响[1],是一组严重威胁儿童身体健康的神经发育性疾病,其主要临床特征是频繁的癫痫样活动、发育落后和进行性神经系统功能倒退的一组癫痫综合征,治疗困难。现在已报道超过100多个基因与发育性癫痫性脑病相关[2]。展开更多
文摘癫痫性脑病(epileptic encephalopathy,EE)是以顽固性癫痫发作和脑电活动严重异常为主要特征的一组疾病综合征。儿童期间起病的EE通常还伴有精神运动发育迟缓或倒退。2017年国际抗癫痫联盟(International League Against Epilepsy,ILAE)对癫痫分类进行更新,强调使用发育性和癫痫性脑病这一术语,EE用于在癫痫发生前没有发育落后,而且基因突变本身也不会导致发育迟缓的情况,发育性和癫痫性是发挥作用的两个因素[1]。
文摘目的研究肿瘤抑癌基因DBC2(deletion in breast cancer2)抑制乳腺癌MDA-MB-435S细胞增殖的可能机制。方法野生型DBC2基因的真核表达载体pEBG-DBC2瞬时转染MDA-MB-435S细胞72h,RT-PCR方法证实DBC2基因的过表达;流式细胞术检测DBC2的瞬时过表达对MDA-MB-435S细胞周期的影响,Western blot检测DBC2的过表达对细胞周期蛋白CyclinD1表达的作用。结果DBC2基因在MDA-MB-435S细胞中瞬时转染72h后,其mR-NA表达水平即可成倍增加,同时DBC2基因的过表达可诱导该乳腺癌细胞周期的G1期阻滞,并随着时间的延长出现细胞凋亡。结论DBC2基因体外抑制乳腺癌细胞生长的功能,可能通过抑制CyclinD1的表达并使细胞停滞于G1期,以及诱导细胞凋亡等机制实现。
文摘目的检测DBC2在胃癌组织中的表达水平及其基因启动子区的甲基化状态,从而探讨二者的相关性。方法选取92例胃癌组织及其相应的癌旁组织为研究对象,通过RT-PCR方法检测DBC2 m RNA表达水平,并利用MS-PCR方法检测DBC2启动子区的甲基化状态,同时分析胃癌组织中DBC2启动子区甲基化水平与临床病理因素的相关性。结果与癌旁组织相比,胃癌组织中DBC2的表达水平降低,同时伴随其启动子区高甲基化。其甲基化水平与肿瘤浸润深度、分化程度及TNM分期密切相关(P<0.05),随着肿瘤浸润深度的增加、分化程度的降低以及TNM分期的提高,胃癌组织中DBC2启动子区具有更明显的甲基化水平。结论胃癌中DBC2启动子区高甲基化可能是导致其表达水平降低的一个重要原因。
文摘目的探讨乳腺癌缺失基因2(deleted in breast cancer2,DBC2)在三阴性乳腺癌(triple-negative breast cancer,TNBC)中的表达,分析其临床病理学意义。方法收集195例乳腺癌标本,采用免疫组化SP法检测38例TNBC、50例非三阴性乳腺癌(non-triple negative breast cancer,NTNBC)和30例正常乳腺组织中DBC2的表达;应用荧光原位杂交技术(fluorescent in situ hybridization,FISH)检测38例TNBC中HER-2基因扩增。结果正常乳腺组织中仅2例DBC2表达缺失(2/30),NTNBC组中21例DBC2表达缺失(21/50);TNBC组中19例DBC2表达缺失(19/38),其表达缺失率高于NTNBC组和正常乳腺组。结论 TNBC中DBC2表达明显缺失,其与肿瘤的增殖和高侵袭性相关,有望成为TNBC靶向治疗的潜在靶点。
文摘乳腺癌缺失基因2(deleted in breast cancer, DBC2)属于一种抑癌基因,定位于人类染色体8p21,全长20.5Kbp,又名Rhobtb2(rho-related BTB do-main-containing@2),即Ras同源蛋白相关的包含两个BTB结构域的基因2。2002年由Hamaguchi等[1]应用表象差异分析法分离得到。DBC2肿瘤抑制基因是目前与90﹪的散发性,非家族性乳腺癌相关的少数基因之一。现就其研究进展综述如下。
文摘Objective:The aim of the study was to construct recombinant type 5 adenovirus expressing the human DBC2(deleted in breast cancer 2) gene for in vitro and in vivo assay in human bladder cancer research.Methods:The human DBC2 gene was first subcloned into a shuttle plasmid pAdTrack-CMV.After recombining with pAdEasy-1 vector in BJ5183 cells,the new recombinant vector pAdEasy-DBC2-CMV was transfected into HEK-293 cells to produce adenovirus.The human bladder cancer cell line T24 was infected with DBC2-containing adenovirus particles.Both RNA and protein were collected from cells harvested at 72 h after infection.Real time quantitative PCR(qPCR) and Western blot were used to examine mRNA and protein levels.Fluorescence microscopy was utilized to observe the expression of reporter green fluorescence protein.Results:Electrophoresis showed there was a 2.2 kb size band produced from high fidelity PCR.Pac I digest of the final produced recombinant vector yielded band sizes of approximately 30 kb and 4.5 kb.After virus infection with the pAdEasy-DBC2-CMV vector,the T24 cell line was observed to highly express green fluorescence protein under a fluorescence microscope.qPCR and Western blot assay identified that the DBC2 gene was overexpressed at both the mRNA and protein levels in virus transfected cells.Conclusion:By using the pAdEasy adenovirus system,we successfully constructed an adenovirus that could highly overexpress the tumor suppressor DBC2 gene in a bladder cancer cell line.This viral construct would be widely used for our further research in gene functional assays and gene therapy in bladder cancer.
文摘癫痫性脑病为癫痫活动本身导致严重认知和行为障碍的疾病,而发育性癫痫性脑病(Developmental and epileptic encephalopathy,DEE)是指病因及癫痫活动共同作用对发育迟缓的影响[1],是一组严重威胁儿童身体健康的神经发育性疾病,其主要临床特征是频繁的癫痫样活动、发育落后和进行性神经系统功能倒退的一组癫痫综合征,治疗困难。现在已报道超过100多个基因与发育性癫痫性脑病相关[2]。