bcl-xL Is Critical for Dendritic Cell Survival In Vivo1

bcl-xL Is Critical for Dendritic Cell Survival In Vivo1
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bcl-xL 对于体内树突状细胞的存活至关重要1

DOI:
--
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发表时间:
2004
影响因子:
4.4
通讯作者:
Joshy Jacob
Joshy Jacob
中科院分区:
医学2区
文献类型:
--
作者:
Huiming Hon;E. Rucker;L. Hennighausen;Joshy Jacob

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树突状细胞(DC)是免疫功能的重要调节因子,将Ags从外周转运到引流淋巴结(dLN),在那里它们启动ag特异性T淋巴细胞。产生的免疫反应的大小取决于淋巴组织中含银DC的寿命。我们假设DC存活的控制是由抗凋亡因子bcl-xL调节的。双表达DNA疫苗用基因枪免疫bcl-xfl/fl小鼠,可在直接转染的皮肤DC中传递Ag,并选择性缺失bcl-x基因。缺乏bcl-x的DC不能产生有效的免疫应答,这与它们由于细胞凋亡而从dLN中迅速消失相对应。我们使用RNA干扰来特异性地沉默C57BL/6小鼠皮肤驻留DC中的抗凋亡bcl-xL亚型,从而证实了这些结果。此外,在trans中递送bcl-xL补充了bcl-xfl/fl小鼠DC中bcl-x的缺乏,导致dLN中含银DC维持正常水平。综上所述,我们的工作表明bcl-xL异构体对皮肤来源的含银DC在体内的存活至关重要。
Dendritic cells (DC) are important regulators of immune function, transporting Ags from the periphery to draining lymph nodes (dLN) where they prime Ag-specific T lymphocytes. The magnitude of the immune response generated depends upon the longevity of the Ag-bearing DC in lymphoid tissues. We hypothesized that the control of DC survival is regulated by the antiapoptotic factor bcl-xL. Gene gun immunization of dual-expression DNA vaccines into a bcl-xfl/fl mouse resulted in the delivery of Ag, as well as selective deletion of the bcl-x gene in directly transfected, skin-residing DC. bcl-x-deficient DC failed to mount effective immune responses, and this corresponded to their rapid disappearance from the dLN due to apoptosis. We confirmed these results using RNA interference to specifically silence the antiapoptotic bcl-xL isoform in targeted skin-residing DC of C57BL/6 mice. In addition, delivery of bcl-xL in trans complemented the bcl-x deficiency in DC of bcl-xfl/fl mice, resulting in the maintenance of normal levels of Ag-bearing DC in the dLN. Taken together, our work demonstrates that the bcl-xL isoform is critical for survival of skin-derived, Ag-bearing DC in vivo.
DOI: --
发表时间: 2000-11
期刊: Development
影响因子: 4.6
作者:
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DOI: --
发表时间: 1992
期刊: Seminars in respiratory infections
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小鼠 bcl-x 基因的基因组组织、启动子区域分析和染色体定位。
DOI: --
发表时间: 1997
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
作者:
Grillot,DA;Gonzalez-Garcia,M;Ekhterae,D;Duan,L;Inohara,N;Ohta,S;Seldin,MF;Nunez,G
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DOI: 10.1073/pnas.85.8.2603
发表时间: 1988-04-01
影响因子: 11.1
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