Contributions of microglia to structural synaptic plasticity.

Area of Science:

• Neuroscience
• Immunology
• Cell Biology

Background:

• Synaptic plasticity relies on neuron-glia communication.
• Microglia, the brain's resident macrophages, modulate neural activity and immune responses.
• Microglial dysfunction is implicated in neurodegenerative disorders, including Alzheimer's disease (AD).

Purpose of the Study:

• To review neuronal-microglial signaling at the synapse.
• To examine microglia's role in synaptic function in pathological conditions, particularly AD.
• To focus on in vivo findings using 2-photon microscopy.

Main Methods:

• Literature review focusing on neuronal-microglial interactions.
• Analysis of in vivo studies utilizing 2-photon microscopy.
• Examination of microglial involvement in synaptic regulation.

Main Results:

• Microglia continuously interact with dendritic spines, regulating structural synaptic changes.
• Neuronal-microglial signaling critically influences synaptic plasticity.
• The precise role of microglia in AD pathogenesis remains a subject of ongoing research and debate.

Conclusions:

• Microglia play a dual role in synaptic function, impacting both normal plasticity and disease states.
• Understanding neuronal-microglial communication is crucial for deciphering neurodegenerative disease mechanisms.
• Further research, especially in vivo, is needed to clarify microglia's controversial role in AD.