Escape from the Phagosome: The Explanation for MHC-I Processing of Mycobacterial Antigens?

Escape from the Phagosome: The Explanation for MHC-I Processing of Mycobacterial Antigens?
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摆脱吞噬体:MHC-1加工分枝杆菌抗原的解释?

DOI:
10.3389/fimmu.2012.00040
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发表时间:
2012
影响因子:
7.3
通讯作者:
Lewinsohn DM
Lewinsohn DM
中科院分区:
医学2区
文献类型:
--
作者:
Harriff MJ;Purdy GE;Lewinsohn DM

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结核分枝杆菌(Mtb)被认为生活在改变的吞噬体环境中。在这种情况下,分枝杆菌抗原进入主要组织相容性 I 类 (MHC-I) 加工机制的机制仍不完全清楚。有证据表明,Mtb 抗原可以在内吞和细胞质环境中进行加工,并且针对 Mtb 抗原如何进入细胞质提出了不同的机制。最近,电子显微镜被用来证明 Mtb 有可能逃离吞噬体并驻留在细胞质中。这被认为是 Mtb 抗原进入 MHC-I 加工和呈递途径的主要机制。在这篇评论中,我们将回顾 Mtb 从细胞质中逃逸的数据,以及这种逃逸是否是抗原呈递给 CD8+ T 细胞所必需的。
Mycobacterium tuberculosis (Mtb) is thought to live in an altered phagosomal environment. In this setting, the mechanisms by which mycobacterial antigens access the major histocompatibility class I (MHC-I) processing machinery remain incompletely understood. There is evidence that Mtb antigens can be processed in both endocytic and cytosolic environments, with different mechanisms being proposed for how Mtb antigens can access the cytosol. Recently, electron microscopy was used to demonstrate that Mtb has the potential to escape the phagosome and reside in the cytosol. This was postulated as the primary mechanism by which Mtb antigens enter the MHC-I processing and presentation pathway. In this commentary, we will review data on the escape of Mtb from the cytosol and whether this escape is required for antigen presentation to CD8+ T cells.
DOI: 10.1034/j.1600-0854.2000.010306.x
发表时间: 2000-03-01
期刊: TRAFFIC
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