Ms. Wenjing Li Profile

Wenjing Li

at Hainan Univ

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Proceedings Article | 15 March 2023 Poster + Paper

Photobiomodulation attenuates microglial activation by enhancing mitophagy

Wenjing Li, Xiaotong Gu, Feng Yue, Feifan Zhou

Proceedings Volume 12362, 1236209 (2023) https://doi.org/10.1117/12.2647097

KEYWORDS: Mitochondria, Inflammation, Attenuation, Brain diseases, Manufacturing, Neurological disorders, Nervous system, Microscopes, Fluorescence, Depolarization

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Neuroinflammation induced by activated microglia is a typical pathological feature in most neurodegenerative diseases. Generally, inhibition of neuroinflammation could attenuate damage of brain in neurodegenerative diseases. Photobiomodulation (PBM) has been proved to suppress neuroinflammation by decreasing microglial activation. However, the underlying mechanisms of PBM on microglial inflammation remain unclear. Herein, we studied the effects of mitochondrial function on PBM regulated microglial inflammation. The results showed that PBM attenuates lipopolysaccharide (LPS)-induced microglial proinflammatory response while ameliorating mitochondrial dysfunction. Further study revealed that PBM promotes mitophagy in microglia exposed to LPS. In addition, we found that 3- methyladenine (3-MA), the autophagy inhibitor, disrupts microglial mitophagy and reverses the protective effect of PBM on inflammation. Taken together, these studies underline the significance of mitophagy in suppressing inflammation and enhancing mitochondrial function in activated microglia under PBM treatment. Our research may supply a potential strategy to control the progression of neuroinflammation.

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