Rebooting blood vessel repair: implications of the SEMA-VR CardioLink-15 trial
Raj Verma, Meena Verma, Brady Park, Hwee Teoh, Adrian Quan, Kim A. Connelly, David A. HessPurpose of review
Glucagon-like peptide-1 receptor agonists (GLP-1RAs) reduce major adverse cardiovascular events (MACE), heart failure, and mortality through undetermined mechanisms independent of glycemic control. This review examines emerging evidence that GLP-1RAs overcome vascular regenerative cell exhaustion (VRCE), a pathological depletion of bone marrow-derived progenitor cells that mediate vessel repair.
Recent findings
VRCE, the progressive loss of circulating progenitor cells that mediate vessel regeneration, has recently emerged as an underappreciated driver of MACE risk in individuals living with type 2 diabetes (T2D), obesity or atherosclerotic cardiovascular disease. In a recent randomized translational trial of semaglutide vs. usual care, SEMA-VR CardioLink-15 provided the direct evidence that 6-month semaglutide administration could reverse VRCE profile associated with longstanding cardiometabolic disease (34.8% increase in VR myeloid progenitor cells, 66.2% expansion of endothelial precursor cells). Semaglutide additionally reduced circulating granulocyte content and suppressed pro-inflammatory TNF and interleukin family cytokines in sera.
Summary
GLP-1RAs can restore bone marrow progenitor cell output towards a more vessel regenerative profile. Reversal of VRCE may partially explain early event curve separation in cardiovascular outcome trials with multiple GLP-1RAs. Therefore, circulating VR cell content could serve as a measure of compromised vascular regenerative capacity and elevated cardiovascular disease risk.