热休克蛋白70(heat shock protein 70, HSP70)在生物细胞或组织免受热或氧化应激等方面起着关键作用,是已知高度保守的蛋白质之一。由于全球环境持续升温,珊瑚大面积白化、死亡,珊瑚如何应对持续升温的抗逆机制是科学研究热点。本研究...热休克蛋白70(heat shock protein 70, HSP70)在生物细胞或组织免受热或氧化应激等方面起着关键作用,是已知高度保守的蛋白质之一。由于全球环境持续升温,珊瑚大面积白化、死亡,珊瑚如何应对持续升温的抗逆机制是科学研究热点。本研究从高温胁迫短指软珊瑚测序蛋白序列数据库分析鉴定出了28个HSP70蛋白家族成员,均为酸性亲水蛋白,大部分蛋白质结构较为稳定。亚细胞定位表明HSP70蛋白主要分布在珊瑚细胞核、细胞质中,在线粒体、内质网上也有少量分布。信号肽预测表明, 28个HSP70蛋白成员中26个没有信号肽,大部分不属于分泌蛋白,不存在跨膜结构。系统进化树结果表明短指软珊瑚HSP70蛋白家族成员聚成5大类。短指软珊瑚HSP70蛋白家族结构和保守基序分析中预测到了10条保守基序motif分为5个亚族。短指软珊瑚HSP70蛋白家族二级结构主要以α-螺旋和无规则卷曲为主,α-螺旋的含量占比大。28个HSP70家族蛋白中有25个预测到了N-糖基化位点,且位点个数在1~9范围内。28个HSP70家族蛋白均预测到磷酸化位点和O-糖基化位点,总个数分别在41~96和1~23范围内。本研究HSP70家族蛋白结果为今后珊瑚在应对全球升温胁迫中的适应机制等方面研究奠定了基础。展开更多
目的:观察注射Hepal-6细胞热休克后裂解蛋白致敏的骨髓来源树突状细胞(bone marrowderived dendritic cells,BMDCs)瘤苗对小鼠肝细胞癌(hepatocellular carcinoma,HCC)瘤内CD25+叉头盒转录因子P3(forkhead box p3,Foxp3)+调节T淋巴细胞(...目的:观察注射Hepal-6细胞热休克后裂解蛋白致敏的骨髓来源树突状细胞(bone marrowderived dendritic cells,BMDCs)瘤苗对小鼠肝细胞癌(hepatocellular carcinoma,HCC)瘤内CD25+叉头盒转录因子P3(forkhead box p3,Foxp3)+调节T淋巴细胞(regulatory T cells,Tregs)浸润的影响.方法:在粒细胞-巨噬细胞集落刺激因子(granulocyte-macrophage colony stimulatingfactor,GM-CSF)和白介素-4(interleukin-4,IL-4)诱导下体外扩增BMDCs,使用Hepal-6细胞热休克后裂解蛋白体外致敏BMDCs制备瘤苗,荧光免疫化学染色和FACS检测致敏前后BMDCs CD11c、CCR7、CD80和CD86的表达变化.使用Hepal-6细胞皮下注射的方法制备小鼠(C57BL/6J)HCC模型,成瘤小鼠分组注射Hepal-6细胞热休克后裂解蛋白致敏的BMDCs瘤苗(足垫部和瘤内,每7 d注射1次,共2次),并另设对照(空白对照组、BMDCs组和Hepal-6细胞裂解蛋白组).在治疗结束后9 d获取组织标本,免疫荧光组织化学染色和FACS检测瘤苗注射后肿瘤内CD8+T细胞和CD25+Foxp3+Tregs细胞的浸润情况.结果:光镜和扫描电镜显示:GM-CSF和IL-4在体外诱导扩增的BMDCs具有树突状细胞特征性的形态特征,且免疫细胞化学染色显示:该细胞表达CD11c,CCR7,CD80和CD86.使用Hepal-6细胞热休克后裂解蛋白致敏的BMDCs组,与对照组(BMDCs组和Hepal-6细胞裂解蛋白组)相比该组细胞CD11c(67.2±4.49 vs 52.4±5.20,58.4±4.43,P<0.01),CCR7(65.4±5.34 vs 45.9±5.04,57.0±3.46,P<0.01),CD80(62.9±4.69 vs 46.9±4.75,54.4±3.47,P<0.01)和CD86(73.3±3.58 vs 60.1±2.98,63.7±3.10,P<0.01)的表达均明显增高.使用Hepal-6细胞热休克后裂解蛋白致敏的BMDCs瘤苗为HCC荷瘤小鼠进行注射治疗,治疗后的检测结果显示:该组小鼠瘤内CD8+T细胞的浸润明显高于对照组(空白对照组、BMDCs组和Hepal-6细胞裂解蛋白组)(55.0±4.11 vs 38.2±3.34,44.6±4.29,45.6±4.92,P<0.01),而同时瘤内CD25+Foxp3+Tregs细胞的浸润则明显低于相应对照组(0.37±0.028 vs 1.31±0.020,0.77±0.057,0.57±0.062,P<0.05).结论:使用Hepal-6细胞热休克后裂解蛋白致敏的BMDCs瘤苗进行治疗,可增强HCC小鼠瘤内CD8+T细胞的浸润,并同时减少CD25+Foxp3+Tregs细胞的浸润,该瘤苗具有抗肿瘤免疫效果.展开更多
To explore the expression and clinical significance of molecular chaperone heat shock protein 90 （HSP90） in peripheral blood mononuclear cells （PBMC） and plasma level of interleukin-6 （IL-6） in patients with sys...To explore the expression and clinical significance of molecular chaperone heat shock protein 90 （HSP90） in peripheral blood mononuclear cells （PBMC） and plasma level of interleukin-6 （IL-6） in patients with systemic lupus erythematosus （SLE）, HSP90 was detected in PBMC by Western blot assay and the plasma level of IL-6 was measured by ELISA in 38 SLE patients and 20 normal controls. The correlation analysis was performed between the SLE disease activity index （SLEDAI） and the expression of HSP90 and IL-6. The results show.ed that there was increased expression of HSP90 in the SLE patients. The active SLE group exhibited higher HSP90 levels （0.82±0.10） than the inactive SLE group （0.54±0.09） （P〈0.01）. The expression of HSP90 in normal control group （0.37±0.11） showed significant statistical difference as compared to both the inactive and active SLE groups （P〈0.01, P〈0.01, respectively）. The plasma level of IL-6 exhibited a significant increase in both the inactive and active SLE groups （28.99±1.74 pg/mL, 44.58±9.15 pg/mL, respectively） compared with normal control group （P〈0.01, P〈0.01, respectively）. The expression of HSP90 and IL-6 in SLE patients showed significant positive correlation with SLEDAI scoring （r=0.80, P〈0.01： r= 0.74, P〈0.01, respectively）. In addition, there was a positive correlation between the level of IL-6 and HSP90 in SLE patients （r= 0.86, P〈0.01）. The increased expression of molecular chaperone HSP90 and IL-6 may play an important role in the pathogenesis of SLE by regulating autoimmunity.展开更多
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:探讨DNAJ热激蛋白家族B8基因(DNAJ heat shock protein family member B8,DNAJB8)在肺腺癌组织中的表达及其对肺腺癌细胞侵袭转移的作用和可能机制。方法:收集四川省人民医院2006年至2008年的肺腺癌手术切除标本102例,通过免疫组...目的:探讨DNAJ热激蛋白家族B8基因(DNAJ heat shock protein family member B8,DNAJB8)在肺腺癌组织中的表达及其对肺腺癌细胞侵袭转移的作用和可能机制。方法:收集四川省人民医院2006年至2008年的肺腺癌手术切除标本102例,通过免疫组织化学(IHC)实验检测DNAJB8在肺腺癌组织中的表达情况,并分析其与临床病理参数及预后的关系。构建DNAJB8稳定敲低的肺腺癌A549细胞和DNAJB8稳定过表达的肺腺癌H1299细胞,CCK-8实验检测DNAJB8敲降或过表达对肺腺癌细胞增殖的影响,Transwell法检测其对肺腺癌细胞侵袭能力的影响,Western blotting检测其对肺腺癌细胞内侵袭相关蛋白MMP-2、MMP-9和ERK表达及活性的影响。裸鼠尾静脉注射DNAJB8稳定敲低的A549细胞构建肺腺癌转移模型,观察DNAJB8对A549细胞体内转移能力的影响。结果:DNAJB8在肺腺癌组织中的表达明显高于正常肺组织,其高表达与患者的淋巴结转移及TNM分期呈正相关,并且预示着患者有较差的预后(均P<0.01)。DNAJB8在A549细胞中的表达量高于H1299细胞,下调DNAJB8表达能够抑制A549细胞的侵袭[(41±3)vs(192±11)个,P<0.01],而上调DNAJB8的表达能够促进H1299细胞的侵袭[(235±14)vs(25±4)个,P<0.01]。实验组肺腺癌转移模型裸鼠肺脏肿瘤结节数显著低于对照组[(5±1)vs(17±3)个,P<0.01]。A549细胞中DNAJB8敲降后,MMP-2、MMP-9表达量和p-ERK水平均显著下降(均P<0.01);而H1299细胞高表达DNAJB8后,MMP-2、MMP-9表达量和p-ERK水平均显著升高(均P<0.01)。结论:DNAJB8能够促进肺腺癌的侵袭和转移,其机制可能与MEK/Erk信号通路有关。展开更多
文摘目的:观察注射Hepal-6细胞热休克后裂解蛋白致敏的骨髓来源树突状细胞(bone marrowderived dendritic cells,BMDCs)瘤苗对小鼠肝细胞癌(hepatocellular carcinoma,HCC)瘤内CD25+叉头盒转录因子P3(forkhead box p3,Foxp3)+调节T淋巴细胞(regulatory T cells,Tregs)浸润的影响.方法:在粒细胞-巨噬细胞集落刺激因子(granulocyte-macrophage colony stimulatingfactor,GM-CSF)和白介素-4(interleukin-4,IL-4)诱导下体外扩增BMDCs,使用Hepal-6细胞热休克后裂解蛋白体外致敏BMDCs制备瘤苗,荧光免疫化学染色和FACS检测致敏前后BMDCs CD11c、CCR7、CD80和CD86的表达变化.使用Hepal-6细胞皮下注射的方法制备小鼠(C57BL/6J)HCC模型,成瘤小鼠分组注射Hepal-6细胞热休克后裂解蛋白致敏的BMDCs瘤苗(足垫部和瘤内,每7 d注射1次,共2次),并另设对照(空白对照组、BMDCs组和Hepal-6细胞裂解蛋白组).在治疗结束后9 d获取组织标本,免疫荧光组织化学染色和FACS检测瘤苗注射后肿瘤内CD8+T细胞和CD25+Foxp3+Tregs细胞的浸润情况.结果:光镜和扫描电镜显示:GM-CSF和IL-4在体外诱导扩增的BMDCs具有树突状细胞特征性的形态特征,且免疫细胞化学染色显示:该细胞表达CD11c,CCR7,CD80和CD86.使用Hepal-6细胞热休克后裂解蛋白致敏的BMDCs组,与对照组(BMDCs组和Hepal-6细胞裂解蛋白组)相比该组细胞CD11c(67.2±4.49 vs 52.4±5.20,58.4±4.43,P<0.01),CCR7(65.4±5.34 vs 45.9±5.04,57.0±3.46,P<0.01),CD80(62.9±4.69 vs 46.9±4.75,54.4±3.47,P<0.01)和CD86(73.3±3.58 vs 60.1±2.98,63.7±3.10,P<0.01)的表达均明显增高.使用Hepal-6细胞热休克后裂解蛋白致敏的BMDCs瘤苗为HCC荷瘤小鼠进行注射治疗,治疗后的检测结果显示:该组小鼠瘤内CD8+T细胞的浸润明显高于对照组(空白对照组、BMDCs组和Hepal-6细胞裂解蛋白组)(55.0±4.11 vs 38.2±3.34,44.6±4.29,45.6±4.92,P<0.01),而同时瘤内CD25+Foxp3+Tregs细胞的浸润则明显低于相应对照组(0.37±0.028 vs 1.31±0.020,0.77±0.057,0.57±0.062,P<0.05).结论:使用Hepal-6细胞热休克后裂解蛋白致敏的BMDCs瘤苗进行治疗,可增强HCC小鼠瘤内CD8+T细胞的浸润,并同时减少CD25+Foxp3+Tregs细胞的浸润,该瘤苗具有抗肿瘤免疫效果.
文摘To explore the expression and clinical significance of molecular chaperone heat shock protein 90 （HSP90） in peripheral blood mononuclear cells （PBMC） and plasma level of interleukin-6 （IL-6） in patients with systemic lupus erythematosus （SLE）, HSP90 was detected in PBMC by Western blot assay and the plasma level of IL-6 was measured by ELISA in 38 SLE patients and 20 normal controls. The correlation analysis was performed between the SLE disease activity index （SLEDAI） and the expression of HSP90 and IL-6. The results show.ed that there was increased expression of HSP90 in the SLE patients. The active SLE group exhibited higher HSP90 levels （0.82±0.10） than the inactive SLE group （0.54±0.09） （P〈0.01）. The expression of HSP90 in normal control group （0.37±0.11） showed significant statistical difference as compared to both the inactive and active SLE groups （P〈0.01, P〈0.01, respectively）. The plasma level of IL-6 exhibited a significant increase in both the inactive and active SLE groups （28.99±1.74 pg/mL, 44.58±9.15 pg/mL, respectively） compared with normal control group （P〈0.01, P〈0.01, respectively）. The expression of HSP90 and IL-6 in SLE patients showed significant positive correlation with SLEDAI scoring （r=0.80, P〈0.01： r= 0.74, P〈0.01, respectively）. In addition, there was a positive correlation between the level of IL-6 and HSP90 in SLE patients （r= 0.86, P〈0.01）. The increased expression of molecular chaperone HSP90 and IL-6 may play an important role in the pathogenesis of SLE by regulating autoimmunity.
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:探讨DNAJ热激蛋白家族B8基因(DNAJ heat shock protein family member B8,DNAJB8)在肺腺癌组织中的表达及其对肺腺癌细胞侵袭转移的作用和可能机制。方法:收集四川省人民医院2006年至2008年的肺腺癌手术切除标本102例,通过免疫组织化学(IHC)实验检测DNAJB8在肺腺癌组织中的表达情况,并分析其与临床病理参数及预后的关系。构建DNAJB8稳定敲低的肺腺癌A549细胞和DNAJB8稳定过表达的肺腺癌H1299细胞,CCK-8实验检测DNAJB8敲降或过表达对肺腺癌细胞增殖的影响,Transwell法检测其对肺腺癌细胞侵袭能力的影响,Western blotting检测其对肺腺癌细胞内侵袭相关蛋白MMP-2、MMP-9和ERK表达及活性的影响。裸鼠尾静脉注射DNAJB8稳定敲低的A549细胞构建肺腺癌转移模型,观察DNAJB8对A549细胞体内转移能力的影响。结果:DNAJB8在肺腺癌组织中的表达明显高于正常肺组织,其高表达与患者的淋巴结转移及TNM分期呈正相关,并且预示着患者有较差的预后(均P<0.01)。DNAJB8在A549细胞中的表达量高于H1299细胞,下调DNAJB8表达能够抑制A549细胞的侵袭[(41±3)vs(192±11)个,P<0.01],而上调DNAJB8的表达能够促进H1299细胞的侵袭[(235±14)vs(25±4)个,P<0.01]。实验组肺腺癌转移模型裸鼠肺脏肿瘤结节数显著低于对照组[(5±1)vs(17±3)个,P<0.01]。A549细胞中DNAJB8敲降后,MMP-2、MMP-9表达量和p-ERK水平均显著下降(均P<0.01);而H1299细胞高表达DNAJB8后,MMP-2、MMP-9表达量和p-ERK水平均显著升高(均P<0.01)。结论:DNAJB8能够促进肺腺癌的侵袭和转移,其机制可能与MEK/Erk信号通路有关。
