This translational study showed that semaglutide mobilizes anti-inflammatory and pro-regenerative progenitor cells from the bone marrow, providing a novel mechanistic explanation for the cardiovascular benefit of GLP-1 receptor agonists.
SEMA-VR CardioLink-15 was a randomized translational trial of usual care vs semaglutide for 6 months in 46 participants with either type 2 diabetes and/or obesity plus atherosclerotic cardiovascular disease (ASCVD) or ASCVD risk factors. Vascular regenerative cells were enumerated using multi-parametric flow cytometry for high aldehyde dehydrogenase activity (ALDHhi) and lineage-specific cell surface marker expression. The primary endpoint was the 6-month change in VR cell content.
Compared with usual care (n = 24), semaglutide (n = 22) led to a greater increase in the number of VR cells [high aldehyde dehydrogenase 1A1 activity and low side scatter (ALDHhiSSClow): +0.8% vs +34.8%; P = .036], pan-haematopoietic myeloid progenitors (ALDHhiSSClowCD45+: +2.8% vs +40.1%; P = .017), and endothelial precursors (ALDHhiSSClowCD34+ CD133+ CD45-: -2.3% vs +66.2%; P = .037) from baseline. Semaglutide also decreased granulocyte precursors (ALDHhiSSChi: +0.3% vs -50.8%; P = .002), particularly those expressing the neutrophil activation marker CD66b and chemokine receptor CXCR2. Semaglutide down-regulated serum proteins over-represented in pro-inflammatory tumour necrosis factor and interleukin signalling pathways.
In people living with either type 2 diabetes or obesity plus ASCVD risk, semaglutide increased circulating VR cell content while reducing pro-inflammatory granulocyte precursors and cytokine production. Collectively, these findings suggest that semaglutide may improve endogenous progenitor cell-mediated blood vessel repair processes.
