“CO18 | Relationship between gut permeability and PCSK9 in heterozygous familial hypercholesterolemia: V. Castellani1, V. Cammisotto2, F. Baratta2, S. Bartimoccia3, C. Nocella2, L. D’erasmo1, N. Cocomello2, C. Barale4, R. Scicali5, I. Russo4, F. Purrello5, R. Carnevale3, F. Violi2, M. Arca1, P. Pignatelli2 | 1Department of Translational and Precision Medicine, Sapienza University of Roma; 2Department of Clinical, Internal Medicine, Anesthesiology and Cardiovascular Sciences, Sapienza University of Roma; 3Department of Medical-Surgical Sciences and Biotechnologies, Sapienza University of Roma; 4Department of Clinical and Biological Sciences, University of Turin; 5Department of Clinical and Experimental Medicine, Internal Medicine, University of Catania, Italy” (2025) Bleeding, Thrombosis and Vascular Biology, 4(s1). doi:10.4081/btvb.2025.222.