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DOI

10.1016/j.jds.2024.10.015

First Page

754

Last Page

763

Abstract

Abstract Background/Purpose Porphyromonas gingivalis ( P. gingivalis ), the primary pathogenic bacterium in periodontitis, can infiltrate the cardiovascular system via the bloodstream and actively contribute to various pathological processes associated with atherosclerosis. The scavenger receptor lectin-like oxidized low-density lipoprotein receptor-1 (LOX-1) plays a crucial role in atherosclerosis pathogenesis. Previous studies have shown that LOX-1 is involved in endothelial cell activation injury, monocyte migration, and adhesion to endothelial cells induced by P. gingivalis . The objective of this study was to further investigate the potential role of LOX-1 in promoting P. gingivalis -induced atherosclerosis in mice. Materials and methods Using apolipoprotein E (APOE)-/- mice fed with high-fat diet for an established model. Intravenous injection of P. gingivalis was performed to create P. gingivalis blood model while intraperitoneal injection of Polyinosinic-polycytidylic acid (Poly (I:C)) served as an inhibitor for LOX-1. After 12 weeks, plaques and blood lipids were examined. Results Results showed that induction with P. gingivalis led to increased expression of LOX-1 in both the aortic root and blood samples, increased plaque area, reduced plaque stability, elevated expression levels of vascular adhesion molecule-1(VCAM-1), Interleukin-6(IL-6) and M1 macrophages. However, pretreatment with Poly (I:C) resulted in decreased plaque area improved plaque stability and reduced expression levels of VCAM-1 and IL-6. Conclusion These findings suggest that LOX-1 may serve as an intermediary factor promoting atherosclerosis associated with periodontitis.

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