目的了解肿瘤抗原肽的HLA限制性以及其诱导的T细胞能否杀伤肿瘤细胞,探索无关供者来源细胞用于过继性抗肿瘤T细胞治疗。方法使用16个肿瘤抗原肽诱导18名无关供者外周血单个核细胞(PBMC)分化为反应性T细胞,并分析HLA型别;利用NetMHC数据...目的了解肿瘤抗原肽的HLA限制性以及其诱导的T细胞能否杀伤肿瘤细胞,探索无关供者来源细胞用于过继性抗肿瘤T细胞治疗。方法使用16个肿瘤抗原肽诱导18名无关供者外周血单个核细胞(PBMC)分化为反应性T细胞,并分析HLA型别;利用NetMHC数据库预测肽和HLA分子亲和力;选择HLA-A2限制性的肿瘤抗原肽诱导第二组17名无关供者的PBMC进行杀瘤实验,反应性T细胞作为效应细胞,T2细胞及肿瘤抗原肽同源的肿瘤细胞作为靶细胞,测量LDH(乳酸脱氢酶)释放量或者RTCA(实时无标记细胞分析仪)检测效应细胞杀瘤效率,比较HLA-A2+和A2-T细胞杀瘤效率。结果筛出和HLA-A2具有高亲和力的肿瘤抗原肽LM7,可诱导5/11 HLA-A2+为反应性T细胞,其中HLA-A2+纯合子则为3/3,而HLA-A2-者则为2/7。LM7诱导反应性T细胞杀伤肿瘤百分比A2+组明显强于A2-组(60.72±11.28 vs 47.2±4.46,P=0.03)。结论本研究显示NetMHC预测对于纯合子样品更有帮助,肿瘤抗原肽LM7具有HLA-A2限制性,可诱导部分HLAA2+PBMC分化为反应性T细胞,可杀伤肿瘤,应对供者进行HLA筛选并分析其细胞功能,其诱导的反应性T细胞可作为过继性T细胞抗肿瘤治疗的细胞来源。展开更多
目的探讨采用黄芩苷预治疗对红细胞免疫的预防性效果。方法采用人类红细胞与佐剂脂多糖(LPS)联合输注C57BL/6小鼠建立红细胞输注模型。设立(1)红细胞输注模型组;(2)未处理对照组:仅注射PBS;(3)黄芩苷预治疗组:在红细胞输注模型建立前一...目的探讨采用黄芩苷预治疗对红细胞免疫的预防性效果。方法采用人类红细胞与佐剂脂多糖(LPS)联合输注C57BL/6小鼠建立红细胞输注模型。设立(1)红细胞输注模型组;(2)未处理对照组:仅注射PBS;(3)黄芩苷预治疗组:在红细胞输注模型建立前一周每天给予小鼠黄芩苷(250 mg/(kg·day))治疗;(4)地塞米松(DEX)对照组:在红细胞输注模型建立前一周每天给予地塞米松(5 mg/(kg·day))治疗。通过流式细胞术检测小鼠血清中IgG和IgM的表达量,并监测小鼠脾脏中的CD4 T细胞和B细胞变化。结果与模型组相比,黄芩苷预治疗能显著降低血清IgG(24823.0±1452.2 vs 15180.0±1172.5,P<0.05)和IgM(194206±2868.6 vs 112287±9741.5,P<0.05)的生成。与模型组相比,黄芩苷预处理组小鼠脾脏中CD25表达明显下降(1006.0±206.1 vs 548.4±19.1,P<0.05),B细胞比例显著降低(31.16%±6.06%vs 15.69%±4.59%,P<0.05),脾脏大小无显著差异[平均长度:(10±0.5)mm vs(12±0.5)mm,P>0.05]。结论黄芩苷能够抑制红细胞免疫,表现为抑制小鼠血清中IgG和IgM的生成,同时抑制脾脏中B细胞增殖和降低CD4 T细胞活化。展开更多
[Objective]The paper was to analyze whether Asiatic black bear( Ursus thibetanus) had different blood group systems. [Method]Whole blood samples were collected from 40 Asiatic black bears in Fujian Province,China. Tub...[Objective]The paper was to analyze whether Asiatic black bear( Ursus thibetanus) had different blood group systems. [Method]Whole blood samples were collected from 40 Asiatic black bears in Fujian Province,China. Tube method was used to detect antibodies in plasma,and antibody isotype was determined with 2-mercaptoethanol. Plasma was further analyzed by mass spectrometry. [Result] The plasma from four black bears had antibodies,possibly Ig M isoform,which could agglutinate RBCs from 30 bears. Blood samples from 10 bears were tested by human blood typing reagents. The results showed that four black bears had blood type like human type O,while six bears had like human type B. Mass spectrometry results demonstrated that plasma protein had extensive homology to serum albumin-like isoform 1 found in giant panda( Ailuropoda melanoleuca). [Conclusion]Asiatic black bear might have at least one blood group system with two blood types. If the sick bear needs blood transfusion,a cross-matching test is necessary. Moreover,giant panda might receive blood from Asiatic black bear in case of emergency.展开更多
文摘目的了解肿瘤抗原肽的HLA限制性以及其诱导的T细胞能否杀伤肿瘤细胞,探索无关供者来源细胞用于过继性抗肿瘤T细胞治疗。方法使用16个肿瘤抗原肽诱导18名无关供者外周血单个核细胞(PBMC)分化为反应性T细胞,并分析HLA型别;利用NetMHC数据库预测肽和HLA分子亲和力;选择HLA-A2限制性的肿瘤抗原肽诱导第二组17名无关供者的PBMC进行杀瘤实验,反应性T细胞作为效应细胞,T2细胞及肿瘤抗原肽同源的肿瘤细胞作为靶细胞,测量LDH(乳酸脱氢酶)释放量或者RTCA(实时无标记细胞分析仪)检测效应细胞杀瘤效率,比较HLA-A2+和A2-T细胞杀瘤效率。结果筛出和HLA-A2具有高亲和力的肿瘤抗原肽LM7,可诱导5/11 HLA-A2+为反应性T细胞,其中HLA-A2+纯合子则为3/3,而HLA-A2-者则为2/7。LM7诱导反应性T细胞杀伤肿瘤百分比A2+组明显强于A2-组(60.72±11.28 vs 47.2±4.46,P=0.03)。结论本研究显示NetMHC预测对于纯合子样品更有帮助,肿瘤抗原肽LM7具有HLA-A2限制性,可诱导部分HLAA2+PBMC分化为反应性T细胞,可杀伤肿瘤,应对供者进行HLA筛选并分析其细胞功能,其诱导的反应性T细胞可作为过继性T细胞抗肿瘤治疗的细胞来源。
文摘目的探讨采用黄芩苷预治疗对红细胞免疫的预防性效果。方法采用人类红细胞与佐剂脂多糖(LPS)联合输注C57BL/6小鼠建立红细胞输注模型。设立(1)红细胞输注模型组;(2)未处理对照组:仅注射PBS;(3)黄芩苷预治疗组:在红细胞输注模型建立前一周每天给予小鼠黄芩苷(250 mg/(kg·day))治疗;(4)地塞米松(DEX)对照组:在红细胞输注模型建立前一周每天给予地塞米松(5 mg/(kg·day))治疗。通过流式细胞术检测小鼠血清中IgG和IgM的表达量,并监测小鼠脾脏中的CD4 T细胞和B细胞变化。结果与模型组相比,黄芩苷预治疗能显著降低血清IgG(24823.0±1452.2 vs 15180.0±1172.5,P<0.05)和IgM(194206±2868.6 vs 112287±9741.5,P<0.05)的生成。与模型组相比,黄芩苷预处理组小鼠脾脏中CD25表达明显下降(1006.0±206.1 vs 548.4±19.1,P<0.05),B细胞比例显著降低(31.16%±6.06%vs 15.69%±4.59%,P<0.05),脾脏大小无显著差异[平均长度:(10±0.5)mm vs(12±0.5)mm,P>0.05]。结论黄芩苷能够抑制红细胞免疫,表现为抑制小鼠血清中IgG和IgM的生成,同时抑制脾脏中B细胞增殖和降低CD4 T细胞活化。
基金Supported by Hong Kong Ocean Park Conservation Foundation(GP01-1617)Special Fund of Health Industry Research(201002005)
文摘[Objective]The paper was to analyze whether Asiatic black bear( Ursus thibetanus) had different blood group systems. [Method]Whole blood samples were collected from 40 Asiatic black bears in Fujian Province,China. Tube method was used to detect antibodies in plasma,and antibody isotype was determined with 2-mercaptoethanol. Plasma was further analyzed by mass spectrometry. [Result] The plasma from four black bears had antibodies,possibly Ig M isoform,which could agglutinate RBCs from 30 bears. Blood samples from 10 bears were tested by human blood typing reagents. The results showed that four black bears had blood type like human type O,while six bears had like human type B. Mass spectrometry results demonstrated that plasma protein had extensive homology to serum albumin-like isoform 1 found in giant panda( Ailuropoda melanoleuca). [Conclusion]Asiatic black bear might have at least one blood group system with two blood types. If the sick bear needs blood transfusion,a cross-matching test is necessary. Moreover,giant panda might receive blood from Asiatic black bear in case of emergency.