Expansion or depletion of T follicular helper cells during HIV infection: consequences for B cell responses.

Expansion or depletion of T follicular helper cells during HIV infection: consequences for B cell responses.
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DOI:
10.2174/1570162x12666140225153552
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发表时间:
2013-12
影响因子:
1
通讯作者:
Mattapallil JJ
Mattapallil JJ
中科院分区:
医学4区
文献类型:
--
作者:
Onabajo OO;Mattapallil JJ

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HIV 感染的特征是 B 细胞反应异常和 B 细胞功能障碍。这些功能失调的反应已在外周血和有组织的淋巴组织(例如淋巴结)中得到广泛记录。尽管人们认为 CD4 T 细胞辅助功能的丧失在功能失调的 B 细胞反应中发挥着关键作用,但最近的研究表明,CD4 T 辅助细胞亚群(称为滤泡辅助 T (Tfh) 细胞)参与了这一过程。 Tfh细胞与B细胞相互作用,在介导生发中心反应、驱动B细胞的分化和成熟中发挥关键作用。为什么 Tfh 在一些 HIV 感染者中增加,而在其他人中则减少,目前尚不清楚。在这里,我们回顾了该领域的一些最新进展,并讨论了 HIV 感染期间 Tfh 细胞失调对 B 细胞反应的影响。
HIV infection is characterized by aberrant B cell responses and B cell dysfunction. These dysfunctional responses have been extensively documented in peripheral blood and organized lymphoid tissues such as the lymph nodes. Though the loss of CD4 T cell help has been thought to play a key role in dysfunctional B cell responses, recent studies have implicated a subset of CD4 T helper cells called the T follicular helper (Tfh) cells in this process. Tfh cells interact with B cells and play a key role in mediating the germinal center reaction, and driving the differentiation and maturation of B cells. Why Tfh expand in some HIV infected individuals as compared to their loss in others is still not clear. Here we review some of the recent developments in the field and discuss the implications of Tfh cell dysregulation on B cell responses during HIV infection.
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