In vitro expansion of human γδ and CD56+ T-cells by Aspergillus-antigen loaded fast dendritic cells in the presence of exogenous interleukin-12

In vitro expansion of human γδ and CD56+ T-cells by Aspergillus-antigen loaded fast dendritic cells in the presence of exogenous interleukin-12
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在外源性白细胞介素 12 存在的情况下,通过加载曲霉抗原的快速树突状细胞体外扩增人 γδ 和 CD56+ T 细胞

DOI:
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发表时间:
2012
影响因子:
3.3
通讯作者:
G. Ramadan
G. Ramadan
中科院分区:
医学4区
文献类型:
--
作者:
G. Ramadan

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烟曲霉菌(Af)感染在异基因骨髓移植(BMT)后尤其普遍,并导致侵袭性肺曲霉病。人γδ T细胞在维持免疫稳态和抵抗病原体和肿瘤中具有重要作用。此外,γδ T细胞可以促进干细胞植入并减少同种异体BMT后危及生命的移植物抗宿主病。此外,CD 56分子在γδ T细胞上的表达增加了它们的抗肿瘤细胞毒性活性。该研究揭示了Af-pulsed快速树突状细胞(快速DC,其仅在72小时内产生)加上IL-12然后IL-2可以在体外增殖自体γδ和⑶ 56 + T细胞,并且这种扩增通过重复刺激而持续(在三次引发后,γδ和⑶ 56 + T细胞分别增加107.5 ± 13.9倍和37.6 ± 2.2倍)。许多扩增的γδ和CD 56 + T细胞表达CD 8分子(29.6%-68.6%),而很少表达CD 4分子(2.3%-17.5%)。此外,约28%的扩增的γδ T细胞是⑶ 56+。另一方面,γδ和CD 56 + T细胞的增殖在不存在Af-pulsed快速DC或IL-12或存在未脉冲快速DC的情况下显著降低(分别为p < 0.001、<19倍和12倍),表明Af-antigen和IL-12在诱导这种扩增中的重要性。γδ和CD 56 + T细胞的扩增并不妨碍Af特异性αβ T细胞效应物的产生。本研究中描述的方法利用自体Af脉冲的快速DC和IL-12,允许体外快速产生Af特异性αβ T细胞效应物和γδ和CD 56 + T细胞的增殖。
Aspergillus fumigatus (Af) infection is especially prevalent after allogenic bone marrow transplantation (BMT) and causes invasive pulmonary aspergillosis. Human γδ T-cells have essential role in maintaining immune homeostasis and in the resistance of pathogens and tumors. Also, γδ T-cells may facilitate stem cells engraftment and decrease a life-threatening graft versus host disease after allogenic BMT. Moreover, expression of CD56 molecules on γδ T-cells increases their antitumor cytotoxic activity. This study reveals that Af-pulsed fast dendritic cells (fast-DCs, which generated within only 72 h) plus IL-12 and then IL-2 can propagate autologous γδ and CD56+ T-cells in vitro and this expansion is sustained by repeating the stimulation (107.5 ± 13.9-fold and 37.6 ± 2.2-fold increase for γδ and CD56+ T-cells, respectively, after three primings). Many of the expanded γδ and CD56+ T-cells expressed CD8 molecules (29.6%−68.6%), while few of them expressed CD4 molecules (2.3%−17.5%). Also, ∼28% of the expanded γδ T-cells were CD56+. On the other hand, the proliferation of γδ and CD56+ T-cells significantly decreased (p < 0.001, <19-fold and 12-fold, respectively) in the absence of either Af-pulsed fast-DCs or IL-12 or in the presence of un-pulsed fast-DCs, indicating the importance of Af-antigens and IL-12 in inducing this expansion. The expansion of γδ and CD56+ T-cells did not hamper the generation of Af-specific αβ T-cell effectors. The methodology described in this study, utilizing autologous Af-pulsed fast-DCs and IL-12, permits the rapid generation of Af-specific αβ T-cell effectors and propagation of γδ and CD56+ T-cells in vitro.
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