目的:探讨生长分化因子11(GDF11)在体外诱导扩增具有干细胞特性的记忆性T细胞(memory stem T cells,Tscm)中的作用,从而进一步提高免疫过继治疗的疗效。方法:通过密度梯度离心的方法分离健康人的外周血单个核细胞,然后用磁珠分选获得CD8...目的:探讨生长分化因子11(GDF11)在体外诱导扩增具有干细胞特性的记忆性T细胞(memory stem T cells,Tscm)中的作用,从而进一步提高免疫过继治疗的疗效。方法:通过密度梯度离心的方法分离健康人的外周血单个核细胞,然后用磁珠分选获得CD8^+T细胞;随后将所得的细胞分为实验组和对照组,实验组中加入等体积、不同浓度的GDF11,对照组中加入等体积的PBS缓冲液,最后分别在不同时点通过流式细胞术检测2组细胞中Tscm的扩增情况。结果:在CD8^+T细胞的体外扩增实验中,GDF11可以显著扩增CD8^+T细胞;在CD8^+T细胞的体外培养实验中,GDF11可以显著提高Tscm在CD8^+T细胞中的比例。结论:GDF11可以有效地在体外扩增CD8^+Tscm,为提高免疫过继治疗的效率提供了新的方法。展开更多
AIM: To investigate how t(11;18)(q21;q21)-positive gastrointestinal MALT lymphomas relate to other marginal zone lymphomas with respect to the somatic mutation pattern of the VH genes and the expression of the marker ...AIM: To investigate how t(11;18)(q21;q21)-positive gastrointestinal MALT lymphomas relate to other marginal zone lymphomas with respect to the somatic mutation pattern of the VH genes and the expression of the marker CD27. METHODS: The VH gene of 7 t(11;18)(q21;q21)-positive gastrointestinal MALT lymphomas was amplif iedby PCR using family specif ic VH primers and a consensus JH primer. PCR products were sequenced and mutation analysis of the CDR and the FR regions was performed. All cases were immunostained for CD27. RESULTS: One case showed unmutated VH genes while the others showed mutated VH genes with mutation frequencies ranging from 1.3 to 14.7% and with evidence of antigen selection in 2 cases. These data suggest that the translocation t(11;18)(q21;q21) can target either B-cells at different stages of differentiation or naive B-cells that retain the capacity to differentiate upon antigen stimulation. All cases but one displayed weak to strong CD27 expression which did not correlate with the VH gene mutation status. CONCLUSION: t(11;18)(q21;q21)-positive gastro- intestinal MALT lymphomas are heterogeneous with respect to the VH mutation status and CD27 is not a marker of somatically mutated B-cells.展开更多
文摘目的:探讨生长分化因子11(GDF11)在体外诱导扩增具有干细胞特性的记忆性T细胞(memory stem T cells,Tscm)中的作用,从而进一步提高免疫过继治疗的疗效。方法:通过密度梯度离心的方法分离健康人的外周血单个核细胞,然后用磁珠分选获得CD8^+T细胞;随后将所得的细胞分为实验组和对照组,实验组中加入等体积、不同浓度的GDF11,对照组中加入等体积的PBS缓冲液,最后分别在不同时点通过流式细胞术检测2组细胞中Tscm的扩增情况。结果:在CD8^+T细胞的体外扩增实验中,GDF11可以显著扩增CD8^+T细胞;在CD8^+T细胞的体外培养实验中,GDF11可以显著提高Tscm在CD8^+T细胞中的比例。结论:GDF11可以有效地在体外扩增CD8^+Tscm,为提高免疫过继治疗的效率提供了新的方法。
基金Supported by A Grant of the "Belgian Cancer Association"the "Fonds voor Wetenschappelijk Onderzoek Vlaanderen"
文摘AIM: To investigate how t(11;18)(q21;q21)-positive gastrointestinal MALT lymphomas relate to other marginal zone lymphomas with respect to the somatic mutation pattern of the VH genes and the expression of the marker CD27. METHODS: The VH gene of 7 t(11;18)(q21;q21)-positive gastrointestinal MALT lymphomas was amplif iedby PCR using family specif ic VH primers and a consensus JH primer. PCR products were sequenced and mutation analysis of the CDR and the FR regions was performed. All cases were immunostained for CD27. RESULTS: One case showed unmutated VH genes while the others showed mutated VH genes with mutation frequencies ranging from 1.3 to 14.7% and with evidence of antigen selection in 2 cases. These data suggest that the translocation t(11;18)(q21;q21) can target either B-cells at different stages of differentiation or naive B-cells that retain the capacity to differentiate upon antigen stimulation. All cases but one displayed weak to strong CD27 expression which did not correlate with the VH gene mutation status. CONCLUSION: t(11;18)(q21;q21)-positive gastro- intestinal MALT lymphomas are heterogeneous with respect to the VH mutation status and CD27 is not a marker of somatically mutated B-cells.
