Farzin Beygui1, Philipp S Wild1, Tanja Zeller1, Marine Germain1, Raphaele Castagné1, Karl J Lackner1, Thomas Münzel1, Gilles Montalescot1, Gary F Mitchell1, Germaine C Verwoert1, Kirill V Tarasov1, David-Alexandre Trégouët1, François Cambien1, Stefan Blankenberg2, Laurence Tiret2. 1. From UMR_S 1166, Sorbonne Universités UPMC Université Paris 06, UMR_S 1166 INSERM, UMR_S 1166 ICAN Institute for Cardiometabolism and Nutrition, Paris, France (F.B., M.G., R.C., G.M., D.-A.T., F.C., L.T.); Department of Cardiology, Caen University Hospital, Caen, France (F.B.); Department of Medicine II (P.S.W., T.M.), Center for Thrombosis and Hemostasis (P.S.W.), Institute for Clinical Chemistry and Laboratory Medicine (K.J.L.), University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany; Department of General and Interventional Cardiology, University Heart Center Hamburg, Hamburg, Germany (T.Z., S.B.); Institut de Cardiologie, Centre Hospitalier Universitaire Pitié-Salpêtriėre (ACTION Group, AP-HP, Université Paris 6), Paris, France (G.M.); Cardiovascular Engineering, Inc, Norwood, MA (G.F.M.); Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands (G.C.V.); and Laboratory of Cardiovascular Science, National Institute on Aging, National Institutes of Health, Baltimore, MD (K.V.T.). 2. From UMR_S 1166, Sorbonne Universités UPMC Université Paris 06, UMR_S 1166 INSERM, UMR_S 1166 ICAN Institute for Cardiometabolism and Nutrition, Paris, France (F.B., M.G., R.C., G.M., D.-A.T., F.C., L.T.); Department of Cardiology, Caen University Hospital, Caen, France (F.B.); Department of Medicine II (P.S.W., T.M.), Center for Thrombosis and Hemostasis (P.S.W.), Institute for Clinical Chemistry and Laboratory Medicine (K.J.L.), University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany; Department of General and Interventional Cardiology, University Heart Center Hamburg, Hamburg, Germany (T.Z., S.B.); Institut de Cardiologie, Centre Hospitalier Universitaire Pitié-Salpêtriėre (ACTION Group, AP-HP, Université Paris 6), Paris, France (G.M.); Cardiovascular Engineering, Inc, Norwood, MA (G.F.M.); Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands (G.C.V.); and Laboratory of Cardiovascular Science, National Institute on Aging, National Institutes of Health, Baltimore, MD (K.V.T.). laurence.tiret@upmc.fr s.blankenberg@uke.de.
Abstract
BACKGROUND: Adrenomedullin (ADM) is a circulating vasoactive peptide involved in vascular homeostasis and endothelial function. Single nucleotide polymorphisms of the ADM gene are associated with blood pressure variability, and elevated levels of plasma midregional proadrenomedullin (MR-pro-ADM) are associated with cardiovascular diseases. METHODS AND RESULTS: We investigated the sources of variability of ADM gene expression and plasma MR-pro-ADM concentrations in the general population, and their relationship with markers of atherosclerosis. MR-pro-ADM levels were assessed in 4155 individuals who underwent evaluation of carotid intima-media thickness and arterial rigidity (reflection index and stiffness index). In a subsample of 1372 individuals, ADM gene expression was assessed as part of a transcriptomic study of circulating monocytes. Nongenetic factors explained 45.8% and 7.5% of MR-pro-ADM and ADM expression variability, respectively. ADM expression correlated with plasma C-reactive protein, interleukin-receptor 1A, and myeloperoxidase, whereas MR-pro-ADM levels correlated with C-terminal proendothelin-1, creatinine, and N-terminal pro-B-type natriuretic peptide. Genome-wide association study of ADM expression and MR-pro-ADM levels both identified a single locus encompassing the ADM gene. ADM expression was associated with 1 single nucleotide polymorphism rs11042717 (P=2.36×10(-12)), whereas MR-pro-ADM was associated with 2 single nucleotide polymorphisms with additive effects, rs2957692 (P=1.54×10(-13)) and rs2957717 (P=4.24×10(-8)). Reflection index was independently associated with rs11042717 (P<10(-4)) and ADM expression (P=0.0002) but not with MR-pro-ADM. Weaker associations were observed for stiffness index. Intima-media thickness was not related to ADM single nucleotide polymorphisms or expression. CONCLUSIONS: These results support an involvement of the ADM gene in the modulation of peripheral vascular tone.
BACKGROUND:Adrenomedullin (ADM) is a circulating vasoactive peptide involved in vascular homeostasis and endothelial function. Single nucleotide polymorphisms of the ADM gene are associated with blood pressure variability, and elevated levels of plasma midregional proadrenomedullin (MR-pro-ADM) are associated with cardiovascular diseases. METHODS AND RESULTS: We investigated the sources of variability of ADM gene expression and plasma MR-pro-ADM concentrations in the general population, and their relationship with markers of atherosclerosis. MR-pro-ADM levels were assessed in 4155 individuals who underwent evaluation of carotid intima-media thickness and arterial rigidity (reflection index and stiffness index). In a subsample of 1372 individuals, ADM gene expression was assessed as part of a transcriptomic study of circulating monocytes. Nongenetic factors explained 45.8% and 7.5% of MR-pro-ADM and ADM expression variability, respectively. ADM expression correlated with plasma C-reactive protein, interleukin-receptor 1A, and myeloperoxidase, whereas MR-pro-ADM levels correlated with C-terminal proendothelin-1, creatinine, and N-terminal pro-B-type natriuretic peptide. Genome-wide association study of ADM expression and MR-pro-ADM levels both identified a single locus encompassing the ADM gene. ADM expression was associated with 1 single nucleotide polymorphism rs11042717 (P=2.36×10(-12)), whereas MR-pro-ADM was associated with 2 single nucleotide polymorphisms with additive effects, rs2957692 (P=1.54×10(-13)) and rs2957717 (P=4.24×10(-8)). Reflection index was independently associated with rs11042717 (P<10(-4)) and ADM expression (P=0.0002) but not with MR-pro-ADM. Weaker associations were observed for stiffness index. Intima-media thickness was not related to ADM single nucleotide polymorphisms or expression. CONCLUSIONS: These results support an involvement of the ADM gene in the modulation of peripheral vascular tone.
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