探讨仙鹤草-黄连(Agrimoniae Herba-Coptidis Rhizoma,XHC-HL)含药血清通过溶酶体相关膜蛋白2A型(lysosome-associated membrane protein type 2A,LAMP2A)介导的自噬对人结直肠癌HT29和HCT116细胞增殖、迁移、侵袭、凋亡的影响。通过生...探讨仙鹤草-黄连(Agrimoniae Herba-Coptidis Rhizoma,XHC-HL)含药血清通过溶酶体相关膜蛋白2A型(lysosome-associated membrane protein type 2A,LAMP2A)介导的自噬对人结直肠癌HT29和HCT116细胞增殖、迁移、侵袭、凋亡的影响。通过生物信息学分析LAMP2A在结直肠癌发生发展中的作用机制;蛋白免疫印迹(Westem blot,WB)检测LAMP2A蛋白在结直肠癌细胞株中的表达;利用慢病毒转染技术构建LAMP2A干扰HT29及过表达HCT116结直肠癌细胞模型;实时荧光定量聚合酶链式反应(real-time qPCR)实验检测转染效率;结直肠癌HT29和HCT116细胞分别给予不同浓度的仙鹤草-黄连含药血清,采用cell counting kit-8(CCK-8)法检测细胞增殖,筛选含药血清最佳干预浓度及时间。将HT29细胞分为空白对照(NC)组、XHC-HL(仙鹤草-黄连药对处理)组、XHC-HL+shLAMP2A(仙鹤草-黄连药对处理+干扰LAMP2A)组;将HCT116细胞分为空白对照(NC)组、XHC-HL(仙鹤草-黄连药对处理)组、XHC-HL+LAMP2A(仙鹤草-黄连药对处理+过表达LAMP2A)组,CCK-8检测细胞活力;平板克隆实验检测细胞增殖能力;划痕实验及Transwell迁移实验检测细胞迁移能力;Transwell侵袭实验检测细胞侵袭能力;流式细胞术检测细胞凋亡率;WB技术和real-time qPCR技术检测仙鹤草-黄连药对对结直肠癌细胞LAMP2A、热休克同源蛋白70(heat shock cognate protein 70,HSC70)、热休克蛋白90(heat shock protein 90,HSP90)、甘油醛-3-磷酸脱氢酶(glyceraldehyde-3-phosphate dehydrogenase,GAPDH)的蛋白表达水平及mRNA的影响。通过差异表达分析发现结直肠癌患者相对于正常对照样本的LAMP2A表达水平有显著升高,生存分析提示伴侣介导的自噬(chaperone-mediated autophagy,CMA)关键分子LAMP2A与结直肠癌的进展密切关联,通过基因集功能富集分析发现LAMP2A高表达患者显著上调了血管生成、免疫抑制等肿瘤进展相关信号通路,且免疫浸润分析发现LAMP2A高表达患者的肿瘤微�展开更多
In this study, the loop-mediated isothermal amplification (LAMP) method was used to develop a rapid and simple detection system for porcine circovirus type 2 (PCV2). According to the PCV2 sequences published in GenBan...In this study, the loop-mediated isothermal amplification (LAMP) method was used to develop a rapid and simple detection system for porcine circovirus type 2 (PCV2). According to the PCV2 sequences published in GenBank, multiple LAMP primers were designed targeting conserved sequences of PCV2. Using the DNA extracted from PCV2 isolates HUN-09 and SD-09 as the template, LAMP reactions in a PCV2 LAMP system was performed, the amplification products were detected by adding SYBR Green I and could be observed directly by the naked eye. The results showed highly-efficient and specific amplification in 30 min at 63°C with a LAMP real-time turbidimeter. Furthermore, PCV2 DNA templates, with a detection limit of 5.5×10-5 ng of nucleic acid, indicated that this assay was highly sensitive. The results obtained with the naked eye after SYBR Green I staining were consistent with those detected by the real-time turbidimeter, showing the potential simplicity of interpretation of the assay results. The LAMP assay appeared to have greater accuracy than PCR and virus isolation for the analysis of 18 clinical samples. In addition it offers higher specificity and sensitivity, shorter reaction times and simpler procedures than the currently available methods of PCV2 detection. It is therefore a promising tool for the effective and efficient detection of PCV2.展开更多
基金Fifteenth National Science and Technology Support Program of China(2007BAD86B04-4)
文摘In this study, the loop-mediated isothermal amplification (LAMP) method was used to develop a rapid and simple detection system for porcine circovirus type 2 (PCV2). According to the PCV2 sequences published in GenBank, multiple LAMP primers were designed targeting conserved sequences of PCV2. Using the DNA extracted from PCV2 isolates HUN-09 and SD-09 as the template, LAMP reactions in a PCV2 LAMP system was performed, the amplification products were detected by adding SYBR Green I and could be observed directly by the naked eye. The results showed highly-efficient and specific amplification in 30 min at 63°C with a LAMP real-time turbidimeter. Furthermore, PCV2 DNA templates, with a detection limit of 5.5×10-5 ng of nucleic acid, indicated that this assay was highly sensitive. The results obtained with the naked eye after SYBR Green I staining were consistent with those detected by the real-time turbidimeter, showing the potential simplicity of interpretation of the assay results. The LAMP assay appeared to have greater accuracy than PCR and virus isolation for the analysis of 18 clinical samples. In addition it offers higher specificity and sensitivity, shorter reaction times and simpler procedures than the currently available methods of PCV2 detection. It is therefore a promising tool for the effective and efficient detection of PCV2.
