目的检测胶质瘤组织中溶酶体相关4次跨膜蛋白B(lysosome-associated protein transmembrane-4 beta,LAPTM4B)蛋白表达,探讨其对细胞增殖和侵袭力的影响以及与患者预后的相关性。方法选取2011年6月至2015年6月在新乡市中心医院行手术切...目的检测胶质瘤组织中溶酶体相关4次跨膜蛋白B(lysosome-associated protein transmembrane-4 beta,LAPTM4B)蛋白表达,探讨其对细胞增殖和侵袭力的影响以及与患者预后的相关性。方法选取2011年6月至2015年6月在新乡市中心医院行手术切除的胶质瘤患者86例,术后随访,随访截止时间2018年6月30日。选取同期正常脑组织25例,免疫组化(SP法)检测胶质瘤和正常脑组织中LAPTM4B蛋白表达,生存分析采用Kaplan-Meier法和Log-Rank检验,影响患者预后的风险因素分析采用Cox比例风险模型分析,培养U251细胞并分为siRNA-LAPTM4B组、siRNA-NC组和空白组,实时荧光定量PCR技术检测细胞中LAPTM4B表达,MTT法和克隆形成实验检测细胞增殖能力,Transwell法检测细胞迁移和侵袭力,Western blot检测细胞中LAPTM4B、E-cadherin、N-cadherin和Vimentin蛋白表达。结果LAPTM4B蛋白在胶质瘤组织中的阳性表达率为77.91%,高于正常脑组织中的28.00%(P<0.001);LAPTM4B蛋白阳性表达率在不同WHO分级差异有统计学意义(P<0.05);Kaplan-Meier生存分析结果显示,LAPTM4B蛋白阳性表达组患者中位生存时间和累积生存率低于LAPTM4B蛋白阴性表达组(P=0.002);Cox比例风险模型分析结果显示,WHO分级和LAPTM4B蛋白表达是影响胶质瘤患者预后的风险因素(P<0.05);与siRNA-NC组和空白组比较,siRNA-LAPTM4B组细胞中LAPTM4B mRNA和蛋白相对表达量降低(P<0.05),24、48、72、96 h时光密度值及细胞克隆数、迁移细胞数、侵袭细胞数、N-cadherin和Vimentin蛋白表达量均降低,而E-cadherin蛋白表达量升高(P<0.05)。结论LAPTM4B蛋白在胶质瘤组织中高表达,促进细胞增殖和侵袭,其机制可能与上皮-间质转化有关。LAPTM4B蛋白表达高低与胶质瘤患者生存有关。展开更多
目的:探讨溶酶体相关4次跨膜蛋白质β(lysosome-associated protein transmembrane4 beta,LAPTM4B)基因多态性与肺癌易感性的关系.方法:以病例-对照研究的方法,用基于特异性引物的PCR对134例正常人和162例肺癌患者进行LAPTM4B基因分型,...目的:探讨溶酶体相关4次跨膜蛋白质β(lysosome-associated protein transmembrane4 beta,LAPTM4B)基因多态性与肺癌易感性的关系.方法:以病例-对照研究的方法,用基于特异性引物的PCR对134例正常人和162例肺癌患者进行LAPTM4B基因分型,将卡方检验用于检测肺癌组和对照组基因型频率和其它参数的分布.结果:LAPTM4B的*2等位基因频率在肺癌组中为40.1%,较对照组(28.0%)显著增高(P=0.002).基因型分布在肺癌组和对照组间差异有统计学意义.*1/2和*2/2基因携带者患肺癌的危险性分别是*1/1的1.91倍(95%CI:1.178~3.110)与3.26倍(95%CI:1.338~7.929).LAPTM4B基因型分布与患者年龄,肺癌的病理类型,分化程度,临床分期以及HBV感染等无明显关系.结论:LAPTM4B基因多态性与肺癌易感性相关,* 2等位基因可能是肺癌发生的危险因素.展开更多
目的探讨人新基因溶酶体相关4次跨膜蛋白质B(lysosome-associated protein transmembrane 4 beta,LAPTM4B)多态性与淋巴瘤易感性的关系。方法以病例-对照研究的方法,基于特异性引物的PCR对350例正常人和166例胃癌患者进行LAPTM4B基因分...目的探讨人新基因溶酶体相关4次跨膜蛋白质B(lysosome-associated protein transmembrane 4 beta,LAPTM4B)多态性与淋巴瘤易感性的关系。方法以病例-对照研究的方法,基于特异性引物的PCR对350例正常人和166例胃癌患者进行LAPTM4B基因分型,用χ2检验检测淋巴瘤组和对照组基因型频率和其他参数的分布。结果淋巴瘤组中LAPTM4B基因的*2等位基因的频率为34.94%,较对照组(24.14%)显著增高(P<0.001)。基因型分布在淋巴瘤组与对照组间差异有统计学意义。*1/2和*2/2基因携带者患淋巴瘤的危险性分别是*1/1的1.475倍(95%CI:0.994-2.189)与3.532倍(95%CI:1.802-6.923)。*2等位基因携带者患淋巴瘤的危险性是*1等位基因的1.710倍(95%CI:1.287-2.271)。LAPTM4B基因型分布与患者年龄、性别、病理类型、临床分期、HBV感染、乳酸脱氢酶(LDH)、β2-微球蛋白(β2-MG)以及有无全身症状等参数无明显关系。结论LAPTM4B基因多态性与淋巴瘤易感性相关,*2等位基因可能是淋巴瘤发生的危险因素。展开更多
目的:检测溶酶体相关4次跨膜蛋白B(lysosome-associated protein transmembrane-4 beta,LAPTM4B)-35蛋白在正常涎腺及涎腺腺样囊性癌中的表达水平,探讨其与肿瘤患者临床病理特征的相关性。方法:收集95例涎腺腺样囊性癌和20例正常涎腺组...目的:检测溶酶体相关4次跨膜蛋白B(lysosome-associated protein transmembrane-4 beta,LAPTM4B)-35蛋白在正常涎腺及涎腺腺样囊性癌中的表达水平,探讨其与肿瘤患者临床病理特征的相关性。方法:收集95例涎腺腺样囊性癌和20例正常涎腺组织,以及相关临床病理资料,应用免疫组织化学法检测LAPTM4B-35在正常涎腺组织、涎腺腺样囊性癌的表达水平,卡方检验或Fisher精确检验及多因素Logistic回归分析探讨LAPTM4B-35表达水平与涎腺腺样囊性癌临床病理特征的关系。结果:LAPTM4B-35蛋白在正常涎腺组织不同细胞中呈差异性表达:在腺泡细胞中表达为阴性,在导管和闰管细胞中表达很弱,在纹状管细胞中表达中等。在涎腺腺样囊性癌组织中,48.00%的高级别涎腺腺样囊性癌LAPTM4B-35表达增高,显著高于低级别涎腺腺样囊性癌。此外,LAPTM4B-35高表达与临床分期晚亦呈显著相关。结论:LAPTM4B-35蛋白在正常涎腺组织细胞中呈差异性表达,与涎腺腺样囊性癌的组织学分级和临床分期显著相关。展开更多
AM: To produce high-quality potyclonal antibody to lysosomeassociated protein transmembrane 4B-35 and to identify LAPTM4B-35 expression in cancer tissues and its correlation with differentiation status of hepatocellul...AM: To produce high-quality potyclonal antibody to lysosomeassociated protein transmembrane 4B-35 and to identify LAPTM4B-35 expression in cancer tissues and its correlation with differentiation status of hepatocellular carcinoma (HCC). METHODS: The 297 bp 5' end of LAPTM4BcDNA was obtained by PCR and inserted into prokaryotic expression vector pGEX-KG. Then the recombinant pGEX-KG-N_(1-99) was transformed into E. coli JM109 to express GST-fusion protein. The fusion protein was purified by glutathione sepharose^(TM) 4B agarose. The purified GST-LAPTM4B-N_(1-99) was characterized by SDSPAGE, and used to immunize rabbits. The titer and specificity of antisera were detected by ELISA and Western blot, respectively. The correlation between the expression levels of LAPTM4B-35 and the differentiation status of HCC was analyzed via Western blot. The expression of LAPTM4B-35 in HCC and other six cancer tissues was investigated via tissue chip and immunohistochemical analysis. RESULTS: About 6.2 mg of pure GST-LAPTM4B-N_(1-99) was isolated from 1 L of bacteria. The GST-LAPTM4B-N_(1-99) produced high titer antisera in rabbits and showed good immunity. Western blot showed specific reactions for the antibody to the LAPTM4B-35 in the total proteins from HCC tissues and BEL-7402 cells, also to the fusion protein purified or in the transformed bacteria. LAPTM4B-35 was remarkably expressed in several cancers, such as HCC, breast cancer, gastric carcinoma, lung cancer, and colon carcinoma, but not commonly expressed in esophageal cancer and rectum carcinoma. Notably, the expression levels of LAPTM4B-35 were significantly and inversely correlated to the differentiation of HCCs in a 20 case analysis. CONCLUSION: Specific polyclonal antibody (LAPTM4BN_(1-99)-pAb) to LAPTM4B-35 was produced. It identified the expression of LAPTM4B-35 in some cancer tissues originated from single layer cuboidal and columnar epithelial cells and firmly demonstrated that the expression of LAPTM4B-35 in HCC was inversely correlated with the differentiation of HCC.展开更多
文摘目的:探讨溶酶体相关4次跨膜蛋白质β(lysosome-associated protein transmembrane4 beta,LAPTM4B)基因多态性与肺癌易感性的关系.方法:以病例-对照研究的方法,用基于特异性引物的PCR对134例正常人和162例肺癌患者进行LAPTM4B基因分型,将卡方检验用于检测肺癌组和对照组基因型频率和其它参数的分布.结果:LAPTM4B的*2等位基因频率在肺癌组中为40.1%,较对照组(28.0%)显著增高(P=0.002).基因型分布在肺癌组和对照组间差异有统计学意义.*1/2和*2/2基因携带者患肺癌的危险性分别是*1/1的1.91倍(95%CI:1.178~3.110)与3.26倍(95%CI:1.338~7.929).LAPTM4B基因型分布与患者年龄,肺癌的病理类型,分化程度,临床分期以及HBV感染等无明显关系.结论:LAPTM4B基因多态性与肺癌易感性相关,* 2等位基因可能是肺癌发生的危险因素.
文摘目的探讨人新基因溶酶体相关4次跨膜蛋白质B(lysosome-associated protein transmembrane 4 beta,LAPTM4B)多态性与淋巴瘤易感性的关系。方法以病例-对照研究的方法,基于特异性引物的PCR对350例正常人和166例胃癌患者进行LAPTM4B基因分型,用χ2检验检测淋巴瘤组和对照组基因型频率和其他参数的分布。结果淋巴瘤组中LAPTM4B基因的*2等位基因的频率为34.94%,较对照组(24.14%)显著增高(P<0.001)。基因型分布在淋巴瘤组与对照组间差异有统计学意义。*1/2和*2/2基因携带者患淋巴瘤的危险性分别是*1/1的1.475倍(95%CI:0.994-2.189)与3.532倍(95%CI:1.802-6.923)。*2等位基因携带者患淋巴瘤的危险性是*1等位基因的1.710倍(95%CI:1.287-2.271)。LAPTM4B基因型分布与患者年龄、性别、病理类型、临床分期、HBV感染、乳酸脱氢酶(LDH)、β2-微球蛋白(β2-MG)以及有无全身症状等参数无明显关系。结论LAPTM4B基因多态性与淋巴瘤易感性相关,*2等位基因可能是淋巴瘤发生的危险因素。
文摘目的:检测溶酶体相关4次跨膜蛋白B(lysosome-associated protein transmembrane-4 beta,LAPTM4B)-35蛋白在正常涎腺及涎腺腺样囊性癌中的表达水平,探讨其与肿瘤患者临床病理特征的相关性。方法:收集95例涎腺腺样囊性癌和20例正常涎腺组织,以及相关临床病理资料,应用免疫组织化学法检测LAPTM4B-35在正常涎腺组织、涎腺腺样囊性癌的表达水平,卡方检验或Fisher精确检验及多因素Logistic回归分析探讨LAPTM4B-35表达水平与涎腺腺样囊性癌临床病理特征的关系。结果:LAPTM4B-35蛋白在正常涎腺组织不同细胞中呈差异性表达:在腺泡细胞中表达为阴性,在导管和闰管细胞中表达很弱,在纹状管细胞中表达中等。在涎腺腺样囊性癌组织中,48.00%的高级别涎腺腺样囊性癌LAPTM4B-35表达增高,显著高于低级别涎腺腺样囊性癌。此外,LAPTM4B-35高表达与临床分期晚亦呈显著相关。结论:LAPTM4B-35蛋白在正常涎腺组织细胞中呈差异性表达,与涎腺腺样囊性癌的组织学分级和临床分期显著相关。
基金Supported by the 248 Major R&D Program of Beijing, No. H020220020310, and Special Fund for Promotion of Education, Ministry of Education, China
文摘AM: To produce high-quality potyclonal antibody to lysosomeassociated protein transmembrane 4B-35 and to identify LAPTM4B-35 expression in cancer tissues and its correlation with differentiation status of hepatocellular carcinoma (HCC). METHODS: The 297 bp 5' end of LAPTM4BcDNA was obtained by PCR and inserted into prokaryotic expression vector pGEX-KG. Then the recombinant pGEX-KG-N_(1-99) was transformed into E. coli JM109 to express GST-fusion protein. The fusion protein was purified by glutathione sepharose^(TM) 4B agarose. The purified GST-LAPTM4B-N_(1-99) was characterized by SDSPAGE, and used to immunize rabbits. The titer and specificity of antisera were detected by ELISA and Western blot, respectively. The correlation between the expression levels of LAPTM4B-35 and the differentiation status of HCC was analyzed via Western blot. The expression of LAPTM4B-35 in HCC and other six cancer tissues was investigated via tissue chip and immunohistochemical analysis. RESULTS: About 6.2 mg of pure GST-LAPTM4B-N_(1-99) was isolated from 1 L of bacteria. The GST-LAPTM4B-N_(1-99) produced high titer antisera in rabbits and showed good immunity. Western blot showed specific reactions for the antibody to the LAPTM4B-35 in the total proteins from HCC tissues and BEL-7402 cells, also to the fusion protein purified or in the transformed bacteria. LAPTM4B-35 was remarkably expressed in several cancers, such as HCC, breast cancer, gastric carcinoma, lung cancer, and colon carcinoma, but not commonly expressed in esophageal cancer and rectum carcinoma. Notably, the expression levels of LAPTM4B-35 were significantly and inversely correlated to the differentiation of HCCs in a 20 case analysis. CONCLUSION: Specific polyclonal antibody (LAPTM4BN_(1-99)-pAb) to LAPTM4B-35 was produced. It identified the expression of LAPTM4B-35 in some cancer tissues originated from single layer cuboidal and columnar epithelial cells and firmly demonstrated that the expression of LAPTM4B-35 in HCC was inversely correlated with the differentiation of HCC.