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在T细胞中受损的PTEN表达驱动了多发性硬化症中对Treg介导免疫调节的抵抗

Janine Schlöder^1,2, Bettina Trinschek¹, Felix Luessi³

¹Department of Dermatology, University Medical Center of the Johannes Gutenberg-University, Langenbeckstr. 1, 55131 Mainz, Germany.

|September 26, 2025

概括

多发性硬化症患者的T细胞中酸酶和张素同类体 (PTEN) 表达减少,损害免疫调节. 这种PTEN损失促进T细胞对调节性T细胞的抵抗力,导致自身免疫性疾病.

科学领域:

免疫学免疫学免疫学
神经免疫学神经免疫学
分子生物学分子生物学

背景情况:

由T细胞介导的免疫反应对于免疫恒温和预防自身免疫性至关重要.
在多发性硬化症 (MS) 中,免疫调节受损允许自身反应性T细胞持续存在,对调节性T细胞 (Treg) 呈现抵抗力.
这种Treg抗性与改变的IL-6信号和蛋白激酶B (PKB/c-Akt) 的过活化有关,但潜在的机制尚不清楚.

研究的目的:

调查酸酶和张素同类素 (PTEN) 的作用,这是PKB/c-Akt的负调节剂,在MS的T细胞调节中发挥作用.
确定PTEN下调是否有助于MS中观察到的Treg耐药性.

主要方法:

从多发性硬化患者的激活效应T细胞 (Teff) 中检查PTEN蛋白表达.
利用PTEN特定的小干扰RNA (siRNA) 来降低健康捐赠者的Teff中的PTEN表达.
评估了IL-6的产生,PKB的酸化,以及在PTEN中断后对Treg介导的抑制的反应.

主要成果:

在MS患者的激活Teff中发现PTEN蛋白表达的快速下降.
在Teff中,从健康的捐赠者中降低PTEN导致IL-6的产生增加,并增强了PKB酸化.
减少PTEN的Teff对Treg介导抑制的敏感性降低,模仿MS相关的Treg抵抗.

结论:

在MS患者的激活Teff中观察到受损的PTEN表达.
PTEN在T细胞的免疫调节中起着至关重要的作用.
PTEN失调被认为是导致MS免疫耐受性受损的因素.

关键词:

CD4+ T 细胞是 CD4+ T 细胞.在IL-6的研究中,IL-6被认为是IL-6的基因.过度激活PKB的情况 PTEN表达式 PTEN表达式这就是Treg电阻.免疫调节免疫调节多发性硬化症多发性硬化症

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