Roles of TRPV4 in Regulating Circulating Angiogenic Cells to Promote Coronary Microvascular Regeneration

Area of Science:

• Cardiovascular Biology
• Regenerative Medicine
• Molecular Mechanisms

Background:

• Transient Receptor Potential Vanilloid 4 (TRPV4) channels are implicated in cardiovascular function.
• Cardiac-derived cells (CACs) hold therapeutic potential for myocardial infarction (MI).
• The interplay between TRPV4, Interleukin-Like Factor (ILK), and CACs in angiogenesis requires elucidation.

Purpose of the Study:

• To investigate the role of TRPV4 in regulating angiogenesis mediated by CACs.
• To explore the influence of ILK on TRPV4 expression and CAC activity.
• To evaluate the cardioprotective effects of TRPV4 modulation in a rat model of acute myocardial infarction (AMI).

Main Methods:

• Assessing angiogenesis in co-cultures of human umbilical vein endothelial cells (HUVECs) and CACs.
• Analyzing the impact of ILK on TRPV4 expression and CACs.
• Administering TRPV4 agonists or inhibitors to AMI rats, with and without CAC transplantation.

Main Results:

• ILK overexpression and TRPV4 agonist treatment enhanced angiogenesis in HUVEC-CAC co-cultures.
• ILK modulated TRPV4 expression in CACs, and TRPV4 agonists influenced ILK expression.
• TRPV4 agonist administration improved myocardial function in AMI rats, with synergistic benefits observed when combined with CAC transplantation.
• CAC transplantation significantly upregulated ILK and TRPV4 expression in the heart tissues of AMI rats.

Conclusions:

• TRPV4 activation promotes angiogenesis and enhances CAC activity.
• TRPV4 agonists may preserve CAC function, promoting angiogenesis and microcirculation repair in myocardial infarction.
• Combined therapy with TRPV4 agonists and CAC transplantation shows significant therapeutic potential for AMI recovery.