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从ART控制的艾滋病毒感染者中CD4T细胞中ROS诱导的线粒体功能障碍
Madison Schank1,2, Juan Zhao1,2, Ling Wang1,2
1Center of Excellence in Inflammation, Infectious Disease and Immunity, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA.
Viruses
|May 27, 2023
概括
反应性氧物种 (ROS) 通过减少抗氧化蛋白SOD1和APE1.1,导致艾滋病毒感染者的CD4T细胞的线粒体功能障碍和过早衰老. 恢复这些蛋白质可以改善线粒体功能.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 病毒学 病毒学
背景情况:
- 线粒体功能障碍在接受抗逆转录病毒治疗 (ART) 的艾滋病毒感染者 (PLWH) 的 CD4 T 细胞中观察到.
- 导致PLWH中CD4 T细胞线粒体损害的精确机制尚未完全理解.
研究的目的:
- 研究在ART控制的PLWH中 CD4 T细胞线粒体功能障碍背后的机制.
- 确定活性氧物种 (ROS) 和特定抗氧化蛋白在这个过程中的作用.
主要方法:
- 从PLWH和健康受试者 (HS) 的CD4T细胞中评估了细胞和线粒体ROS水平.
- 超氧化物脱核酶1 (SOD1) 和阿普里尼克/阿普里米尼克内核酶1 (APE1) 蛋白质的量化水平.
- 利用CRISPR/Cas9击败HS CD4 T细胞中的SOD1或APE1,通过p53介导通路研究它们在线粒体呼吸中的作用.
- 在PLWH CD4 T细胞中复制SOD1或APE1,并使用海马分析评估线粒体功能.
主要成果:
- 与HS相比,来自PLWH的CD4 T细胞表现出显著升高的细胞和线粒体ROS水平.
- 在来自PLWH的CD4T细胞中,SOD1和APE1的水平显著降低.
- 在HS CD4 T细胞中,SOD1或APE1的抑制会损害线粒体呼吸,通过p53通路证实了它们的重要性.
- 在PLWH CD4 T细胞中SOD1或APE1的复制恢复了线粒体功能.
结论:
- 升高的ROS水平有助于线粒体功能障碍和PLWH中CD4 T细胞的过早衰老.
- 降低SOD1和APE1的调节在ROS诱导的线粒体损害中起着至关重要的作用.
- 向ROS和恢复SOD1/APE1水平可能提供治疗策略,以减轻HIV感染中的T细胞衰老.
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