[Inflammation and muscle regeneration, a double-edged sword]

Area of Science:

• Muscle physiology and regeneration
• Immunology of tissue repair
• Skeletal muscle inflammation

Background:

• Muscle injuries frequently trigger inflammatory responses.
• Conventional therapies often use anti-inflammatory agents, based on the view that inflammation is detrimental.
• Emerging evidence suggests a controlled inflammatory response is vital for effective muscle healing.

Purpose of the Study:

• To review recent findings on leukocyte involvement in muscle regeneration.
• To highlight the critical role of macrophages in muscle repair.
• To explore the dynamic interaction between leukocytes and myogenic cells.

Main Methods:

• Literature review of recent scientific advances.
• Synthesis of studies on inflammatory processes in muscle tissue.
• Analysis of leukocyte phenotypes and their impact on muscle regeneration.

Main Results:

• Macrophages are key players in muscle regeneration due to their phenotypic plasticity.
• The microenvironment influences macrophage polarization from pro-inflammatory to anti-inflammatory.
• Interactions between leukocytes and myogenic cells are essential for optimal recovery.

Conclusions:

• An efficient inflammatory response, not its suppression, is necessary for optimal muscle recovery.
• Macrophages' ability to switch phenotypes is central to their role in muscle regeneration.
• Understanding these leukocyte-myogenic cell interactions can inform new therapeutic strategies.