CD147 deficiency in T cells prevents thymic involution by inhibiting the EMT process in TECs in the presence of TGFβ.

CD147 deficiency in T cells prevents thymic involution by inhibiting the EMT process in TECs in the presence of TGFβ.
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T 细胞中的 CD147 缺陷通过在 TGF beta 存在的情况下抑制 TEC 中的 EMT 过程来防止胸腺复旧

DOI:
10.1038/s41423-019-0353-7
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发表时间:
2021-01
影响因子:
24.1
通讯作者:
Chen ZN
Chen ZN
中科院分区:
医学1区
文献类型:
--
作者:
Chen R;Wang K;Feng Z;Zhang MY;Wu J;Geng JJ;Chen ZN

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衰老过程中的胸腺退化是 T 细胞生成减少和免疫力下降的主要原因。在这里,我们发现 T 细胞上 CD147 的缺失可以防止胸腺衰老,从而导致胸腺随着年龄的增长而萎缩减慢,并增加初始 T 细胞的产生。这种表型是胸腺上皮细胞(TEC)上皮-间质转化(EMT)过程减慢的结果,最终导致脂肪细胞积累减少。在体外共培养系统中,我们发现TGFβ是TECs EMT过程中的重要因素,并且它可以通过p-Smad2/FoxC2信号传导降低E-cadherin的表达。此外,T细胞上的CD147可以通过与TEC上的膜联蛋白A2相互作用来加速E-钙粘蛋白表达的下降。在 TGFβ 存在的情况下,膜联蛋白 A2 和 E-钙粘蛋白在 TEC 上共定位。然而,T 细胞上的 CD147 竞争性结合 TEC 上的膜联蛋白 A2,导致 E-钙粘蛋白的分离。然后,分离的E-钙粘蛋白很容易被磷酸化Src激酶磷酸化,磷酸化Src激酶是由TGFβ诱导的,最后,p-E-钙粘蛋白被降解。因此,在胸腺中,T 细胞和 TEC 之间的相互作用有助于胸腺随着年龄的增长而退化。在这项研究中,我们阐明了触发 TEC 中 EMT 过程的潜在机制,并表明抑制 TGFβ 和/或 CD147 可能作为阻碍与年龄相关的胸腺复旧的策略。
Thymic involution during aging is a major cause of decreased T-cell production and reduced immunity. Here, we show that the loss of CD147 on T cells prevents thymic senescence, resulting in slowed shrinkage of the thymus with age and increased production of naive T cells. This phenotype is the result of slowing of the epithelial–mesenchymal transition (EMT) process in thymic epithelial cells (TECs), which eventually leads to reduced adipocyte accumulation. In an in vitro coculture system, we found that TGFβ is an important factor in the EMT process in TECs and that it can reduce the expression of E-cadherin through p-Smad2/FoxC2 signaling. Moreover, CD147 on T cells can accelerate the decline in E-cadherin expression by interacting with Annexin A2 on TECs. In the presence of TGFβ, Annexin A2 and E-cadherin colocalize on TECs. However, CD147 on T cells competitively binds to Annexin A2 on TECs, leading to the isolation of E-cadherin. Then, the isolated E-cadherin is easily phosphorylated by phosphorylated Src kinase, the phosphorylation of which was induced by TGFβ, and finally, p-E-cadherin is degraded. Thus, in the thymus, the interaction between T cells and TECs contributes to thymic involution with age. In this study, we illuminate the mechanism underlying the triggering of the EMT process in TECs and show that inhibiting TGFβ and/or CD147 may serve as a strategy to hinder age-related thymic involution.
DOI: 10.1038/s41423-018-0012-4
发表时间: 2019-06
影响因子: 24.1
作者:
Guo N;Ye S;Zhang K;Yu X;Cui H;Yang X;Lin P;Lv M;Miao J;Zhang Y;Han Q;Zhang R;Chen Z;Zhu P
通讯作者: Zhu P
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DOI: 10.1084/jem.173.5.1039
发表时间: 1991-05-01
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期刊: The Korean journal of physiology & pharmacology : official journal of the Korean Physiological Society and the Korean Society of Pharmacology
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DOI: 10.1016/j.smim.2012.04.005
发表时间: 2012-10
影响因子: 7.8
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