Morphological and functional changes in bone marrow mesenchymal stem cells in rats with heart failure

Area of Science:

• Cardiovascular Biology
• Stem Cell Biology
• Regenerative Medicine

Background:

• Heart failure is a complex condition impacting multiple organ systems.
• Bone marrow-derived mesenchymal stem cells (BMSCs) are crucial for tissue repair and regeneration.
• The functional state of BMSCs in the context of heart failure requires further investigation.

Purpose of the Study:

• To investigate the morphological and protein expression changes in BMSCs from rats with experimentally induced heart failure.
• To analyze the secretion profile of key growth factors by BMSCs under heart failure conditions.

Main Methods:

• A rat model of chronic heart failure was established via partial abdominal aorta constriction.
• BMSCs were isolated from both heart failure and sham-operated control rats.
• Cell morphology, protein expression, and supernatant cytokine levels (HGF, IGF-1, PDGF, SCF, FGF, VEGF) were assessed using microscopy and ELISA.

Main Results:

• BMSCs from heart failure rats exhibited reduced cell diameter and area compared to controls.
• Single-cell protein expression in BMSCs was significantly lower in the heart failure group.
• Secreted levels of SCF and PDGF were decreased, while VEGF was increased in the heart failure group's BMSC supernatant.

Conclusions:

• Heart failure significantly alters the morphology and protein expression of BMSCs.
• BMSCs from heart failure rats show a diminished capacity for secreting certain crucial cytokines, potentially impairing their regenerative function.
• These findings highlight the impact of the failing heart microenvironment on stem cell properties.