Convergent mechanisms of microglia-mediated synaptic dysfunction contribute to diverse neuropathological conditions

Area of Science:

• Neuroscience
• Immunology
• Pathology

Background:

• Synaptic dysfunction is an early indicator of neuropathological conditions, often preceding clinical symptoms.
• Microglia are increasingly implicated in synaptic alterations due to genetic, transcriptional, and epidemiological evidence.
• Environmental exposures, such as infection, can modulate neuroimmune interactions and contribute to synaptic changes.

Purpose of the Study:

• To review evidence on the functional roles of microglia in various neuropathological contexts.
• To discuss convergent mechanisms of microglial-mediated synaptic dysfunction.
• To highlight microglia as potential therapeutic targets for neurological diseases.

Main Methods:

• Review of existing genetic, transcriptional, and epidemiological studies.
• Analysis of research on microglial function in neurodegeneration, aging, neuropsychiatric disorders, neurodevelopmental disorders, and infections.
• Synthesis of findings to identify common mechanisms of microglial involvement in synaptopathies.

Main Results:

• Convergent mechanisms underlie microglial-mediated synaptic dysfunction across diverse neurological conditions.
• Early microglial changes, influenced by genetics and environment, are proposed as a common factor in synaptic pathologies.
• Microglia play a crucial role in both the response to and contribution to synaptopathies.

Conclusions:

• Microglia are central players in early synaptic pathology across a spectrum of neurological disorders.
• Understanding microglial responses to genetic and environmental factors is crucial for addressing neurological diseases.
• Microglia represent a promising and broadly relevant therapeutic target for neurological conditions.