Abstract 11417: Elevated Serum Osteoprotegerin is Associated With Increased Left Ventricular Mass Index and Left Ventricular Diastolic Stiffness in African Americans: Insights From the Genetic Epidemiology Network of Arteriopathy (GENOA) Study
Background: Osteoprotegerin (OPG) associates with a poor prognosis in patients that have already developed heart failure with preserved ejection fraction (HFpEF). OPG also associates with fibrosis and collagen cross-linking which increase diastolic stiffness in the left ventricle (LV). Little is known about the relationship of OPG and LV structure and function in African Americans who are disproportionately affected by HFpEF. We hypothesized that OPG may serve as an early indicator of developing LV hypertrophy and stiffening which are prominent precursors to HFpEF.
Methods and Results: Our analysis included 1172 participants with preserved LV ejection fraction (EF >50%) from the African American (Jackson) cohort of the Genetic Epidemiology Network of Arteriopathy (GENOA) Study (mean age 62.9 years, 72% female). LV diastolic stiffness was assessed by echocardiography using the recently developed diastolic wall strain (DWS) indicator calculated as (LV posterior wall thickness at end-systole - LV posterior wall thickness at end-diastole) / LV posterior wall thickness at end-systole. Associations between serum OPG levels and indices of LV structure and function were evaluated using a generalized linear mixed models (GLMM) accounting for clustering in siblings, and adjusted for possible confounders including age, gender, past history of hypertension and diabetes, current smoking status and estimated glomerular filtration rate (eGFR). OPG levels correlated with age, female sex, presence of hypertension and diabetes, lower eGFR, and higher N-terminal prohormone brain natriuretic peptide levels (p <0.05 for all). Thus, higher OPG levels were associated with characteristics common in patients with HFpEF. Multivariable linear regression analysis revealed that after adjustment for covariates, higher OPG levels were associated with greater LV mass index and increased LV diastolic stiffness (p <0.05, for all).
Conclusions: Higher OPG levels associated with characteristics common in patients with HFpEF in African Americans. The serum OPG levels also significantly associated with known precursors to HFpEF, indicating a potential pathophysiologic role for OPG in the development of HFpEF in African Americans.
Author Disclosures: D. Kamimura: None. T. Suzuki: None. A.L. Furniss: None. M.E. Griswold: None. M.L. Lindsey: Research Grant; Modest; R01HL075360 (NIH), 5I01BX000505. M.D. Winniford: None. K.R. Butler: None. T.H. Mosley: Research Grant; Modest; U01-HL054463 (NIH). M.E. Hall: None.
- © 2016 by American Heart Association, Inc.