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Increased circulating concentrations and augmented myocardial extraction of osteoprotegerin in heart failure due to left ventricular pressure overload
Author(s) -
Helske Satu,
Kovanen Petri T.,
Lindstedt Ken A.,
Salmela Kaija,
Lommi Jyri,
Turto Heikki,
Werkkala Kalervo,
Kupari Markku
Publication year - 2007
Publication title -
european journal of heart failure
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.149
H-Index - 133
eISSN - 1879-0844
pISSN - 1388-9842
DOI - 10.1016/j.ejheart.2006.10.015
Subject(s) - osteoprotegerin , medicine , cardiology , heart failure , pressure overload , rankl , coronary sinus , blood pressure , endocrinology , receptor , activator (genetics) , cardiac hypertrophy
Background Osteoprotegerin (OPG) and the receptor activator of nuclear factor‐kB ligand (RANKL), two cytokines regulating bone remodeling, have recently been raised as potential pathogenetic factors in cardiovascular diseases. We have studied circulating and myocardial OPG and RANKL in patients having severe aortic stenosis (AS) with or without heart failure (HF). Methods We studied 131 adults with AS. Blood was sampled from the aortic root, coronary sinus, and femoral vein at cardiac catheterization. LV myocardial biopsies were taken at surgery. Plasma OPG and soluble (s)RANKL were analyzed by ELISA, and myocardial OPG and RANKL by RT‐PCR and immunohistochemistry. Results Circulating OPG was elevated in AS patients with HF, the association being independent of age, sex, and presence of coronary artery disease ( β =0.17, p =0.033). Elevated plasma OPG decreased after valve replacement in patients with preoperative HF ( p =0.0005). Relative to its concentration in the aortic root, plasma OPG was reduced in the coronary sinus ( p <0.05) and in the femoral vein ( p <0.001), these arteriovenous gradients being accentuated in HF ( p =0.003). Conclusions HF due to LV pressure overload in AS increases circulating OPG and augments OPG extraction by the heart and peripheral tissues. OPG may be involved in the pathogenesis of HF and could serve as a useful biomarker in HF due to LV pressure overload.