目的观察乙肝病毒(hepatitis B virus,HBV)核酸疫苗pCMV-S2S免疫小鼠后的特异性细胞毒性T淋巴细胞(CTL)应答,及对表达HBV preS2S抗原的SP2/0-S2S肿瘤细胞攻击的保护作用。方法将BALB/c小鼠随机分为3组,于0、4及8周分别接种pCMV-S2S(实验...目的观察乙肝病毒(hepatitis B virus,HBV)核酸疫苗pCMV-S2S免疫小鼠后的特异性细胞毒性T淋巴细胞(CTL)应答,及对表达HBV preS2S抗原的SP2/0-S2S肿瘤细胞攻击的保护作用。方法将BALB/c小鼠随机分为3组,于0、4及8周分别接种pCMV-S2S(实验组)、乙肝表面抗原蛋白疫苗(HBsAg,对照组1)、空载质粒(pCMV,对照组2)各3次。末次免疫后4周,每组各取3只小鼠,以乳酸脱氢酶(LDH)释放法检测特异性CTL活性。各组其它小鼠均用于肿瘤细胞攻击实验:分别于一侧胁部皮下种植SP2/0-S2S细胞,同时于另一侧种植不表达HBV preS2S抗原的SP2/0-CMV细胞作阴性对照。种植肿瘤细胞(荷瘤)后观察成瘤时间、肿瘤大小和荷瘤后小鼠的生存时间及生存率。结果pCMV-S2S组CTL活性为(34.21±1.38)%,高于HBsAg组〔(19.64±1.50)%〕和pCMV组〔(3.45±1.89)%〕(P<0.05)。荷瘤后10d,pCMV-S2S组小鼠SP2/0-S2S细胞的成瘤率为58.3%,低于SP2/0-CMV细胞的成瘤率(91.7%)(P<0.05);两对照组SP2/0-S2S细胞与SP2/0-CMV细胞的的成瘤率无明显差异。荷瘤后pCMV-S2S组初次出现死亡小鼠的时间为24d,较两对照组均延迟了13d,平均生存时间为(31±1)d,较两对照组延长(P<0.05);4周生存率(75%)高于两对照组(P<0.05),两对照组之间生存时间及生存率差异无统计学意义。结论HBV核酸疫苗pCMV-S2S能在小鼠体内诱生较强的特异性CTL活性,对荷瘤小鼠具有特异性免疫保护作用,可望用于HBV感染的免疫保护。展开更多
目的:探讨红景天苷(salidroside,SAL)对树突状细胞(dendritic cell,DC)表型及细胞毒性T细胞(cytotoxic T lymphocyte,CTL)抗肿瘤能力的影响。方法:选用Lewis肺癌细胞株3LL、野生型C57BL/6和TLR4-/-C57BL/6小鼠,获取小鼠骨髓来源的DC前...目的:探讨红景天苷(salidroside,SAL)对树突状细胞(dendritic cell,DC)表型及细胞毒性T细胞(cytotoxic T lymphocyte,CTL)抗肿瘤能力的影响。方法:选用Lewis肺癌细胞株3LL、野生型C57BL/6和TLR4-/-C57BL/6小鼠,获取小鼠骨髓来源的DC前体细胞,经过培养分化成未成熟DC,收获第6天的DC,经磁珠分选后获得纯度较高的CD11c+DC。将细胞分成PBS组、SAL组和脂多糖(lipopolysaccharide,LPS)组,培养48 h后用流式细胞术检测SAL体外对DC表面分子、吞噬功能、TLR4通路和对T细胞杀伤能力的影响。结果:与PBS组比较,SAL组DC的表面分子CD80、CD86、MHCⅡ表达水平显著升高(均P<0.05)、吞噬功能显著下降(P<0.05)、TLR4表达水平显著升高(P<0.01);与野生型组比较,TLR4-/-组DC经SAL或LPS处理后,其表面分子CD80、CD86、MHCⅡ的表达水平显著降低(均P<0.05);与PBS组比较,SAL组刺激活化的CTL对肺癌3LL细胞的杀伤效应显著升高(P<0.05)。结论:SAL可以通过调控TLR4诱导DC成熟,从而提高T细胞的杀伤能力。展开更多
Equine herpesvirus-1 (EHV-1) remains one of the most common viral pathogens affecting horses worldwide presenting as a persistent infection which can establish latency in nerve ganglia (trigeminal ganglion), lymphoid ...Equine herpesvirus-1 (EHV-1) remains one of the most common viral pathogens affecting horses worldwide presenting as a persistent infection which can establish latency in nerve ganglia (trigeminal ganglion), lymphoid tissues of the respiratory tract and peripheral blood lymphocytes. EHV-1 infection induces both humoral and cellular immune responses in horses. Virus neutralising antibody, particularly in the nasopharynx, is to kill free virus shed from infected epithelial cells. Hence this antibody has important functions in reducing virus shedding and spreading infection to cohorts. Cellular immune responses, particularly those carried out by cytotoxic T lymphocyte (CTL), have been shown to be effective in killing virus-infected cells in vitro. This review underlines the state of knowledge regarding immunity to EHV-1 and also its interaction with equine lymphocyte. Finally, the review also includes the importance of the viral immediate early (IE) protein in the pathogenesis of EHV-1. This information can be used as the basis for future research.展开更多
Objective: To established methods for cryopreserving peripheral blood mononuclear cells (PBMCs) andproducing DCs from cryopreserved PBMCs. Methods:Mature DCs were generated from cryopreserved PBMCs by using IL-4, GM...Objective: To established methods for cryopreserving peripheral blood mononuclear cells (PBMCs) andproducing DCs from cryopreserved PBMCs. Methods:Mature DCs were generated from cryopreserved PBMCs by using IL-4, GM-CSF, TNF-a, IL-1b, IL-6, pgE2 and LPS. The phenotype of the resultant DCs was investigated by flow cytometry. The functions of the resultant DCs were verified by Elispot assay. Results: The resultant DCs expressed high levels of HLA ABC, HLA DR, costimulatory molecules and the DC maturation marker CD83. The mature DCs wegenerated from frozen PBMCs were able to prime CD8 T cells into long term IFN-g producing peptide specific CTL. Conclusion: The DCs we developed from cryopreservedPBMC were fully mature and had the capability tostimulate immune reaction. Thus, we developed a method to generate functional mature DC from cryopreservedPBMC.展开更多
文摘目的观察乙肝病毒(hepatitis B virus,HBV)核酸疫苗pCMV-S2S免疫小鼠后的特异性细胞毒性T淋巴细胞(CTL)应答,及对表达HBV preS2S抗原的SP2/0-S2S肿瘤细胞攻击的保护作用。方法将BALB/c小鼠随机分为3组,于0、4及8周分别接种pCMV-S2S(实验组)、乙肝表面抗原蛋白疫苗(HBsAg,对照组1)、空载质粒(pCMV,对照组2)各3次。末次免疫后4周,每组各取3只小鼠,以乳酸脱氢酶(LDH)释放法检测特异性CTL活性。各组其它小鼠均用于肿瘤细胞攻击实验:分别于一侧胁部皮下种植SP2/0-S2S细胞,同时于另一侧种植不表达HBV preS2S抗原的SP2/0-CMV细胞作阴性对照。种植肿瘤细胞(荷瘤)后观察成瘤时间、肿瘤大小和荷瘤后小鼠的生存时间及生存率。结果pCMV-S2S组CTL活性为(34.21±1.38)%,高于HBsAg组〔(19.64±1.50)%〕和pCMV组〔(3.45±1.89)%〕(P<0.05)。荷瘤后10d,pCMV-S2S组小鼠SP2/0-S2S细胞的成瘤率为58.3%,低于SP2/0-CMV细胞的成瘤率(91.7%)(P<0.05);两对照组SP2/0-S2S细胞与SP2/0-CMV细胞的的成瘤率无明显差异。荷瘤后pCMV-S2S组初次出现死亡小鼠的时间为24d,较两对照组均延迟了13d,平均生存时间为(31±1)d,较两对照组延长(P<0.05);4周生存率(75%)高于两对照组(P<0.05),两对照组之间生存时间及生存率差异无统计学意义。结论HBV核酸疫苗pCMV-S2S能在小鼠体内诱生较强的特异性CTL活性,对荷瘤小鼠具有特异性免疫保护作用,可望用于HBV感染的免疫保护。
文摘目的:探讨红景天苷(salidroside,SAL)对树突状细胞(dendritic cell,DC)表型及细胞毒性T细胞(cytotoxic T lymphocyte,CTL)抗肿瘤能力的影响。方法:选用Lewis肺癌细胞株3LL、野生型C57BL/6和TLR4-/-C57BL/6小鼠,获取小鼠骨髓来源的DC前体细胞,经过培养分化成未成熟DC,收获第6天的DC,经磁珠分选后获得纯度较高的CD11c+DC。将细胞分成PBS组、SAL组和脂多糖(lipopolysaccharide,LPS)组,培养48 h后用流式细胞术检测SAL体外对DC表面分子、吞噬功能、TLR4通路和对T细胞杀伤能力的影响。结果:与PBS组比较,SAL组DC的表面分子CD80、CD86、MHCⅡ表达水平显著升高(均P<0.05)、吞噬功能显著下降(P<0.05)、TLR4表达水平显著升高(P<0.01);与野生型组比较,TLR4-/-组DC经SAL或LPS处理后,其表面分子CD80、CD86、MHCⅡ的表达水平显著降低(均P<0.05);与PBS组比较,SAL组刺激活化的CTL对肺癌3LL细胞的杀伤效应显著升高(P<0.05)。结论:SAL可以通过调控TLR4诱导DC成熟,从而提高T细胞的杀伤能力。
文摘Equine herpesvirus-1 (EHV-1) remains one of the most common viral pathogens affecting horses worldwide presenting as a persistent infection which can establish latency in nerve ganglia (trigeminal ganglion), lymphoid tissues of the respiratory tract and peripheral blood lymphocytes. EHV-1 infection induces both humoral and cellular immune responses in horses. Virus neutralising antibody, particularly in the nasopharynx, is to kill free virus shed from infected epithelial cells. Hence this antibody has important functions in reducing virus shedding and spreading infection to cohorts. Cellular immune responses, particularly those carried out by cytotoxic T lymphocyte (CTL), have been shown to be effective in killing virus-infected cells in vitro. This review underlines the state of knowledge regarding immunity to EHV-1 and also its interaction with equine lymphocyte. Finally, the review also includes the importance of the viral immediate early (IE) protein in the pathogenesis of EHV-1. This information can be used as the basis for future research.
文摘Objective: To established methods for cryopreserving peripheral blood mononuclear cells (PBMCs) andproducing DCs from cryopreserved PBMCs. Methods:Mature DCs were generated from cryopreserved PBMCs by using IL-4, GM-CSF, TNF-a, IL-1b, IL-6, pgE2 and LPS. The phenotype of the resultant DCs was investigated by flow cytometry. The functions of the resultant DCs were verified by Elispot assay. Results: The resultant DCs expressed high levels of HLA ABC, HLA DR, costimulatory molecules and the DC maturation marker CD83. The mature DCs wegenerated from frozen PBMCs were able to prime CD8 T cells into long term IFN-g producing peptide specific CTL. Conclusion: The DCs we developed from cryopreservedPBMC were fully mature and had the capability tostimulate immune reaction. Thus, we developed a method to generate functional mature DC from cryopreservedPBMC.
