How to reprogram microglia toward beneficial functions

Area of Science:

• Neuroscience
• Immunology
• Cell Biology

Background:

• Microglia are non-neural brain cells crucial for inflammatory responses to perinatal insults like hypoxia/ischemia or infection.
• Microglia can recognize pathogens and initiate cytotoxic responses, potentially worsening brain damage.
• Despite their critical role, the mechanisms controlling diverse microglial phenotypes remain largely undefined.

Purpose of the Study:

• To review emerging strategies for directing microglia toward beneficial functions.
• To highlight studies providing insights into the molecular mechanisms of microglial phenotypic switching.
• To explore therapeutic opportunities for controlling microglial responses in brain disorders.

Main Methods:

• Review of experimental studies on microglial responses to injury.
• Analysis of pharmacological agents, cytokines, lipid messengers, microRNAs, nutritional approaches, and immunomodulatory cell therapies.
• Investigation of molecular mechanisms underlying microglial phenotypic changes.

Main Results:

• Microglia exhibit significant plasticity, capable of both exacerbating brain damage and promoting tissue regeneration.
• Various approaches, including pharmacological and cellular therapies, are being explored to modulate microglial function.
• Energy metabolism plays a central role in shaping microglial functions and their phenotypic switch.

Conclusions:

• Understanding microglial plasticity is key to developing targeted therapies for brain disorders.
• Manipulation of microglial energy metabolism offers promising therapeutic avenues.
• Harnessing beneficial microglial functions could prevent detrimental inflammation and promote brain repair.