Decoding the Dialogue: Immunity and central nervous system interactions in neurodegenerative diseases

Area of Science:

• Neuroscience
• Immunology
• Pathology

Background:

• The central nervous system (CNS) possesses innate immune cells like microglia and astrocytes.
• The CNS relies on the peripheral immune system (PIS) for adaptive immune responses.
• Neuroimmune interactions are vital for CNS protection, function, and development.

Purpose of the Study:

• To review neuroimmune interactions in CNS protection and function.
• To explore the role of neuroimmune dysregulation in neurodegenerative diseases (NDDs).
• To detail the interplay between central and peripheral immunity.

Main Methods:

• Review of existing literature on neuroimmunology.
• Description of innate CNS immunity components (blood-brain barrier, microglia, astrocytes).
• Explanation of peripheral immune cell recruitment into the CNS.

Main Results:

• Microglia, astrocytes, and T-cells are key in neurodevelopment, plasticity, and synaptic pruning.
• The PIS regulates CNS functions like fever and sickness behavior.
• Immune system dysregulation contributes to neuroinflammation in NDDs.

Conclusions:

• Neuroimmune interactions are fundamental to CNS homeostasis.
• Aberrant neuroimmune responses are implicated in Alzheimer's, Parkinson's, Huntington's, and ALS.
• Understanding these interactions is critical for NDD pathogenesis research.