Dual and beneficial roles of macrophages during skeletal muscle regeneration.

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Chazaud, Bénédicte | Brigitte, Madly | Yacoub-Youssef, Houda | Arnold, Ludovic | Gherardi, Romain | Sonnet, Corinne | Lafuste, Peggy | Chretien, Fabrice

Edité par CCSD ; American College of Sports Medicine -

International audience. Macrophages are necessary for skeletal muscle regeneration after injury. Muscle recruits inflammatory monocytes/macrophages that switch toward an anti-inflammatory profile upon phagocytosis of debris. In vitro, proinflammatory macrophages stimulate myoblast proliferation, whereas anti-inflammatory macrophages stimulate their differentiation. Thus, macrophages are involved in both phases of skeletal muscle regeneration: first, inflammation and cleansing of necrosis, and then myogenic differentiation and tissue repair.

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Macrophages (MPs) are important for skeletal muscle regeneration in vivo and may exert beneficial effects on myogenic cell growth through mitogenic and antiapoptotic activities in vitro. However, MPs are highly versatile and may e...

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