Aging brain: exploring the interplay between bone marrow aging, immunosenescence, and neuroinflammation

Area of Science:

• Gerontology
• Immunology
• Neuroscience

Background:

• Aging triggers immunosenescence, altering immune cell function and impacting the central nervous system.
• The bone marrow is central to immune cell production but undergoes age-related changes affecting hematopoiesis and immune homeostasis.
• These bone marrow alterations are increasingly recognized for their role in neuroinflammation and neurological disease pathogenesis.

Purpose of the Study:

• To explore the intricate relationship between bone marrow aging and immunosenescence.
• To elucidate the mechanisms linking bone marrow aging to neuroinflammation and age-related neurological disorders.
• To highlight the potential for therapeutic interventions targeting bone marrow aging to benefit neurological health in the elderly.

Main Methods:

• This mini-review synthesizes current research on bone marrow aging and immunosenescence.
• It examines cellular and molecular pathways connecting bone marrow alterations to neuroinflammatory processes.
• The review focuses on the pathophysiology of age-related neurological diseases.

Main Results:

• Age-related changes in the bone marrow microenvironment, including stem cell function and inflammatory signaling, dysregulate immune cell production and function.
• These bone marrow-derived immune dysregulations contribute to inflammaging and exacerbate neuroinflammation.
• The aging bone marrow is a significant factor in the progression of neurological disorders.

Conclusions:

• Bone marrow aging critically impacts immune function and contributes to the development and progression of neurological diseases.
• Targeting age-related bone marrow changes offers a promising therapeutic strategy for mitigating neuroinflammation and neurological decline.
• Further research into this interplay is essential for developing effective interventions for aging populations.