Inflammasomes in neuroinflammation and changes in brain function: a focused review

Area of Science:

• Neuroscience
• Immunology
• Pathology

Background:

• Neuroinflammation, an innate immune response in the central nervous system (CNS), involves protein complexes called inflammasomes.
• Inflammasomes activate caspases, cleaving cytokines like IL-1β, IL-18, and IL-33, which promote inflammation and are implicated in neurodegenerative diseases and cognitive decline.
• NLRP inflammasomes are linked to depression, Alzheimer's disease, and metabolic disorders, often co-morbid with psychiatric conditions.

Purpose of the Study:

• To review the signaling pathways of NLRP inflammasome activation.
• To examine the role of NLRP inflammasomes in neuroinflammation and associated behavioral changes.
• To explore the therapeutic potential of targeting NLRP inflammasomes for CNS disorders.

Main Methods:

• Literature review of inflammasome-mediated inflammatory pathways in CNS disorders.
• Analysis of cytokine roles (e.g., TNF-α, IFN-γ, IL-6) in inflammasome activation and inhibition.
• Examination of the connection between NLRP inflammasomes, neuroinflammation, and behavioral alterations.

Main Results:

• Inflammasomes play a key role in neuroinflammation, contributing to aging-related neurodegeneration, cognitive impairment, and dementia.
• NLRP inflammasomes are implicated in the etiology of depression, Alzheimer's disease, and metabolic disorders.
• Cytokines like TNF-α can activate inflammasomes, while IFN-γ may inhibit them, potentially delaying disease progression.

Conclusions:

• NLRP inflammasomes are critical mediators of neuroinflammation and behavioral changes in various CNS disorders.
• Targeting NLRP inflammasomes presents a promising therapeutic strategy for neuroinflammation and associated psychiatric illnesses.
• Further extensive research is necessary to fully realize the therapeutic potential of NLRP inflammasome-targeted therapies.