Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

The Anti-atherosclerotic Effects of Endothelin Receptor Antagonist, Bosentan, in Combination with Atorvastatin – an Experimental Study

Version 1 : Received: 13 May 2024 / Approved: 14 May 2024 / Online: 14 May 2024 (06:50:40 CEST)

How to cite: Stasinopoulou, M.; Kostomitsopoulos, N.; Kadoglou, N. P. The Anti-atherosclerotic Effects of Endothelin Receptor Antagonist, Bosentan, in Combination with Atorvastatin – an Experimental Study. Preprints 2024, 2024050913. https://doi.org/10.20944/preprints202405.0913.v1 Stasinopoulou, M.; Kostomitsopoulos, N.; Kadoglou, N. P. The Anti-atherosclerotic Effects of Endothelin Receptor Antagonist, Bosentan, in Combination with Atorvastatin – an Experimental Study. Preprints 2024, 2024050913. https://doi.org/10.20944/preprints202405.0913.v1

Abstract

Bosentan, an endothelin-receptor antagonist (ERA), has potential anti-atherosclerotic properties. We investigated the complementary effects of bosentan and atorvastatin on the progression and composition of the atherosclerotic lesions in diabetic mice. Forty-eight male apoE-/- mice were fed high-fat diet (HFD) for 14 weeks. At week 8, diabetes was induced with streptozotocin and mice were randomized into 4 groups: 1) Control/COG: no intervention. 2) ΒΟG: bosentan 100 mg/kg/day per os. 3) ATG: atorvastatin 20mg/kg/day per os). 4) BO+ATG: Combined administration of bosentan and atorvastatin. The intra-plaque contents of collagen, elastin, monocyte chemoattractant protein-1 (MCP-1), tumor necrosis factor-a (TNF-a), matrix-metalloproteinases (MMP-2,-3,-9), and TIMP-1 concentrations were determined. The percentage of lumen stenosis significantly decreased across all treated groups: BOG: 19.5±2.2%, ATG: 12.8±4.8%, BO+ATG: 9.1±2.7% compared to controls (24.6±4.8%, p<0.001). Both atorvastatin and bosentan significantly increased collagen content and fibrous cap thickness versus COG (p<0.01). All intervention groups reduced the relative intra-plaque concentrations of MCP-1, MMP-3,-9, and increased TIMP-1 compared to COG (p<0.001). Importantly, bosentan showed modest but additive to atorvastatin effects on the latter parameters compared COG (p<0.05). Bosentan treatment in diabetic, atherosclerotic apoE-/- mice delayed the atherosclerosis progression and enhanced plaques’ stability, showing modest but complementary effects with atorvastatin, which are promising in atherosclerotic cardiovascular diseases.

Keywords

endothelin-receptor antagonist (ERA); bosentan; atorvastatin; atherosclerosis; plaque stability; matrix metalloproteinases

Subject

Medicine and Pharmacology, Cardiac and Cardiovascular Systems

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