Arthrospira Platensis Attenuates Endothelial Inflammation and Monocyte Activation.

Cardiovascular diseases (CVDs) remain the leading cause of morbidity and mortality in industrialized countries. Coronary artery disease (CAD) represents the most prevalent form of cardiovascular disease and remains a leading cause of morbidity, mortality, and long-term disability worldwide. Therefore, the identification of early biomarkers and clarification of the mechanism of action of pharmacological adjuvants is urgently needed. Nutraceuticals such as Arthrospira platensis (commonly known as spirulina) have emerged as promising modulators for their notable vascular anti-inflammatory properties. In this study, we provide novel evidence of the anti-inflammatory and anti-atherosclerotic potential of Arthrospira platensis toward endothelial cells and immune interactions, combining in vitro assays with bioinformatic profiling. Spirulina treatment significantly attenuated endothelial and angiogenic activation, reducing pro-inflammatory cytokine and VEGFA/VEGFR2 expression. Additionally, it also decreased the activation and adhesion capabilities of THP-1 monocytic cell lines. Through computational analysis of the complex molecular mixture present in Arthrospira platensis, we have identified a subset of compounds exhibiting high structural similarity to CHEMBL3559503, a well-characterized synthetic molecule with dual activity as a TLR9 agonist and anti-angiogenic agent. This represents a novel insight, suggesting that spirulina may serve as a natural source of analogues capable of modulating both immune and angiogenic pathways. These results highlight Arthrospira platensis as a promising candidate nutraceutical for targeting endothelial/immune crosstalk in the context of atherosclerosis prevention, offering both mechanistic insights and translational potential.