Qian Yun, Yan Zhiwen, Ye Tianbao, Shahin Victor, Jiang Jia, Fan Cunyi
Department of Orthopedics Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai People's Republic of China.
Shanghai Engineering Research Center for Orthopaedic Material Innovation and Tissue Regeneration Shanghai People's Republic of China.
Exploration (Beijing). 2024 Mar 19;4(6):20230098. doi: 10.1002/EXP.20230098. eCollection 2024 Dec.
ATP synthase inhibitory factor 1 (ATPIF1), a key modulator of ATP synthase complex activity, has been implicated in various physiological and pathological processes. While its role is established in conditions such as hypoxia, ischemia-reperfusion injury, apoptosis, and cancer, its involvement remains elusive in peripheral nerve regeneration. Leveraging ATPIF1 knockout transgenic mice, this study reveals that the absence of ATPIF1 impedes neural structural reconstruction, leading to delayed sensory and functional recovery. RNA-sequencing unveils a significant attenuation in immune responses following peripheral nerve injury, which attributes to the CCR2/CCL2 signaling axis and results in decreased macrophage infiltration and activation. Importantly, macrophages, not Schwann cells, are identified as key contributors to the delayed Wallerian degeneration in ATPIF1 knockout mice, and affect the overall outcome of peripheral nerve regeneration. These results shed light on the translational potential of ATPIF1 for improving peripheral nerve regeneration.
ATP合酶抑制因子1(ATPIF1)是ATP合酶复合体活性的关键调节因子,已被证明参与多种生理和病理过程。虽然其在缺氧、缺血再灌注损伤、细胞凋亡和癌症等情况下的作用已得到证实,但其在周围神经再生中的作用仍不明确。本研究利用ATPIF1基因敲除转基因小鼠,发现ATPIF1的缺失会阻碍神经结构重建,导致感觉和功能恢复延迟。RNA测序显示,周围神经损伤后免疫反应显著减弱,这归因于CCR2/CCL2信号轴,导致巨噬细胞浸润和活化减少。重要的是,巨噬细胞而非施万细胞被确定为ATPIF1基因敲除小鼠中沃勒变性延迟的关键因素,并影响周围神经再生的总体结果。这些结果为ATPIF1在改善周围神经再生方面的转化潜力提供了线索。