How Does Lifestyle Affect Hematopoiesis and the Bone Marrow Microenvironment?

Area of Science:

• Hematology and immunology
• Exercise physiology
• Obesity research

Background:

• Lifestyle factors like diet-induced obesity and physical activity significantly impact health and longevity.
• Obesity is linked to negative health outcomes, partly via chronic inflammation from myeloid cell overproduction in bone marrow.
• Hematopoietic stem cells (HSCs) in the bone marrow are central to myelopoiesis and inflammation.

Approach:

• This review summarizes recent literature on exercise's effects on hematopoiesis in obesity.
• It explores how exercise training restores the bone marrow microenvironment.
• The potential role of extracellular vesicles (EVs) in mediating these exercise-induced effects is introduced.

Key Points:

• Exercise training can reverse obesity-associated aberrant myelopoiesis.
• Exercise normalizes the bone marrow microenvironment by reducing adipose tissue and pro-inflammatory cytokines.
• Exercise increases HSC retention factor expression, crucial for healthy hematopoiesis.

Conclusions:

• Exercise interventions hold promise for mitigating obesity-related health issues.
• Understanding exercise-induced hematopoiesis modulation is key to developing new therapeutic strategies.
• Extracellular vesicles (EVs) represent a novel area for research in exercise immunology.