Jordan L Williams1, Omer Cavus2, Emefah C Loccoh2, Sara Adelman2, John C Daugherty1, Sakima A Smith2, Benjamin Canan1, Paul M L Janssen1, Sara Koenig1, Crystal F Kline1, Peter J Mohler3, Elisa A Bradley4. 1. The Ohio State University, Department of Physiology and Cell Biology, United States. 2. The Ohio State University Wexner Medical Center, Department of Internal Medicine, Division of Cardiovascular Medicine, Columbus, OH, United States. 3. The Ohio State University, Department of Physiology and Cell Biology, United States; The Ohio State University Wexner Medical Center, Department of Internal Medicine, Division of Cardiovascular Medicine, Columbus, OH, United States. 4. The Ohio State University, Department of Physiology and Cell Biology, United States; The Ohio State University Wexner Medical Center, Department of Internal Medicine, Division of Cardiovascular Medicine, Columbus, OH, United States. Electronic address: elisa.bradley@osumc.edu.
Abstract
AIMS: Right ventricular failure (RVF) varies significantly from the more common left ventricular failure (LVF). This study was undertaken to determine potential molecular pathways that are important in human right ventricular (RV) function and may mediate RVF. MATERIALS AND METHODS: We analyzed mRNA of human non-failing LV and RV samples and RVF samples from patients with pulmonary arterial hypertension (PAH), and post-LVAD implantation. We then performed transcript analysis to determine differential expression of genes in the human heart samples. Immunoblot quantification was performed followed by analysis of non-failing and failing phenotypes. KEY FINDINGS: Inflammatory pathways were more commonly dysregulated in RV tissue (both non-failing and failing phenotypes). In non-failing human RV tissue we found important differences in expression of FIGF, TRAPPAC, and CTGF suggesting that regulation of normal RV and LV function are not the same. In failing RV tissue, FBN2, CTGF, SMOC2, and TRAPP6AC were differentially expressed, and are potential targets for further study. SIGNIFICANCE: This work provides some of the first analyses of the molecular heterogeneity between human RV and LV tissue, as well as key differences in human disease (RVF secondary to pulmonary hypertension and LVAD mediated RVF). Our transcriptional data indicated that inflammatory pathways may be more important in RV tissue, and changes in FIGF and CTGF supported this hypothesis. In PAH RV failure samples, upregulation of FBN2 and CTGF further reinforced the potential significance that altered remodeling and inflammation play in normal RV function and failure.
AIMS: Right ventricular failure (RVF) varies significantly from the more common left ventricular failure (LVF). This study was undertaken to determine potential molecular pathways that are important in human right ventricular (RV) function and may mediate RVF. MATERIALS AND METHODS: We analyzed mRNA of human non-failing LV and RV samples and RVF samples from patients with pulmonary arterial hypertension (PAH), and post-LVAD implantation. We then performed transcript analysis to determine differential expression of genes in the human heart samples. Immunoblot quantification was performed followed by analysis of non-failing and failing phenotypes. KEY FINDINGS: Inflammatory pathways were more commonly dysregulated in RV tissue (both non-failing and failing phenotypes). In non-failing human RV tissue we found important differences in expression of FIGF, TRAPPAC, and CTGF suggesting that regulation of normal RV and LV function are not the same. In failing RV tissue, FBN2, CTGF, SMOC2, and TRAPP6AC were differentially expressed, and are potential targets for further study. SIGNIFICANCE: This work provides some of the first analyses of the molecular heterogeneity between human RV and LV tissue, as well as key differences in human disease (RVF secondary to pulmonary hypertension and LVAD mediated RVF). Our transcriptional data indicated that inflammatory pathways may be more important in RV tissue, and changes in FIGF and CTGF supported this hypothesis. In PAH RV failure samples, upregulation of FBN2 and CTGF further reinforced the potential significance that altered remodeling and inflammation play in normal RV function and failure.
Authors: D Abraham; R Hofbauer; R Schäfer; R Blumer; P Paulus; A Miksovsky; H Traxler; A Kocher; S Aharinejad Journal: Circ Res Date: 2000-10-13 Impact factor: 17.367
Authors: Salim Yusuf; Marc A Pfeffer; Karl Swedberg; Christopher B Granger; Peter Held; John J V McMurray; Eric L Michelson; Bertil Olofsson; Jan Ostergren Journal: Lancet Date: 2003-09-06 Impact factor: 79.321
Authors: Jonathan J Edwards; Jeffrey Brandimarto; Dong-Qing Hu; Sunhye Jeong; Nora Yucel; Li Li; Kenneth C Bedi; Shogo Wada; Danielle Murashige; Hyun Tae V Hwang; Mingming Zhao; Kenneth B Margulies; Daniel Bernstein; Sushma Reddy; Zoltan Arany Journal: Front Cardiovasc Med Date: 2020-10-07