PubMed · 1102382
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1975. Peptic diseases.. https://pubmed.ncbi.nlm.nih.gov/1102382/
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The adherence of monocytes to the arterial endothelium followed by its migration into the arterial intima is the earliest event in atherogenesis. The vasoconstrictive peptide, Endothelin-1 (ET-1), is elevated in patients with atherosclerosis. We were interested to know whether ET-1 was a chemoattractant for blood monocytes. Using the modified membrane filter technique for chemotaxsis assessment, ET-1 increased monocyte chemotaxis in a dose-dependent manner. Ca2+ channel blockers, Nifedipine, Diltiazem and Verapamil (5 microM), reduced ET-1 chemotaxsis more than 60% (P < 0.001). Aspirin and Indomethacin (1 mM and 100 microM, respectively) reduced migration by 23% (P < 0.05). Alpha-Lipoic acid, Probucol and Neomycin (100 microM) were also migration inhibitory (37%, P < 0.01). These results suggest that ET-1 is a strong chemoattractant for blood monocytes; Ca2+ influx is probably the major stimulus for the accelerated migration induced by ET-1.
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