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Grabowski K, Herlan L, Witten A, Qadri F, Eisenreich A, Lindner D, Schädlich M, Schulz A, Subrova J, Mhatre KN, Primessnig U, Plehm R, van Linthout S, Escher F, Bader M, Stoll M, Westermann D, Heinzel FR, Kreutz R. Cpxm2 as a novel candidate for cardiac hypertrophy and failure in hypertension. Hypertens Res 2022; 45:292-307. [PMID: 34916661 PMCID: PMC8766285 DOI: 10.1038/s41440-021-00826-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 10/08/2021] [Accepted: 10/29/2021] [Indexed: 12/18/2022]
Abstract
Treatment of hypertension-mediated cardiac damage with left ventricular (LV) hypertrophy (LVH) and heart failure remains challenging. To identify novel targets, we performed comparative transcriptome analysis between genetic models derived from stroke-prone spontaneously hypertensive rats (SHRSP). Here, we identified carboxypeptidase X 2 (Cpxm2) as a genetic locus affecting LV mass. Analysis of isolated rat cardiomyocytes and cardiofibroblasts indicated Cpxm2 expression and intrinsic upregulation in genetic hypertension. Immunostaining indicated that CPXM2 associates with the t-tubule network of cardiomyocytes. The functional role of Cpxm2 was further investigated in Cpxm2-deficient (KO) and wild-type (WT) mice exposed to deoxycorticosterone acetate (DOCA). WT and KO animals developed severe and similar systolic hypertension in response to DOCA. WT mice developed severe LV damage, including increases in LV masses and diameters, impairment of LV systolic and diastolic function and reduced ejection fraction. These changes were significantly ameliorated or even normalized (i.e., ejection fraction) in KO-DOCA animals. LV transcriptome analysis showed a molecular cardiac hypertrophy/remodeling signature in WT but not KO mice with significant upregulation of 1234 transcripts, including Cpxm2, in response to DOCA. Analysis of endomyocardial biopsies from patients with cardiac hypertrophy indicated significant upregulation of CPXM2 expression. These data support further translational investigation of CPXM2.
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Affiliation(s)
- Katja Grabowski
- grid.7468.d0000 0001 2248 7639Charité—Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Institut für Klinische Pharmakologie und Toxikologie, 10178 Berlin, Germany
| | - Laura Herlan
- grid.7468.d0000 0001 2248 7639Charité—Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Institut für Klinische Pharmakologie und Toxikologie, 10178 Berlin, Germany
| | - Anika Witten
- grid.16149.3b0000 0004 0551 4246Department of Genetic Epidemiology, Institute of Human Genetics, University Hospital Münster, Münster, Germany
| | - Fatimunnisa Qadri
- grid.419491.00000 0001 1014 0849Max-Delbrück Center for Molecular Medicine (MDC), Berlin-Buch, Berlin, Germany
| | - Andreas Eisenreich
- grid.7468.d0000 0001 2248 7639Charité—Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Institut für Klinische Pharmakologie und Toxikologie, 10178 Berlin, Germany
| | - Diana Lindner
- grid.452396.f0000 0004 5937 5237German Center for Cardiovascular Research (DZHK), Partner site Hamburg/Kiel/Lübeck, Hamburg, Germany ,grid.13648.380000 0001 2180 3484Clinic for Cardiology, University Heart and Vascular Center Hamburg, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Martin Schädlich
- grid.16149.3b0000 0004 0551 4246Department of Genetic Epidemiology, Institute of Human Genetics, University Hospital Münster, Münster, Germany
| | - Angela Schulz
- grid.7468.d0000 0001 2248 7639Charité—Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Institut für Klinische Pharmakologie und Toxikologie, 10178 Berlin, Germany
| | - Jana Subrova
- grid.7468.d0000 0001 2248 7639Charité—Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Institut für Klinische Pharmakologie und Toxikologie, 10178 Berlin, Germany
| | - Ketaki Nitin Mhatre
- grid.7468.d0000 0001 2248 7639Charité—Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Department of Cardiology, Campus Virchow Klinikum, 10178 Berlin, Germany
| | - Uwe Primessnig
- grid.7468.d0000 0001 2248 7639Charité—Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Department of Cardiology, Campus Virchow Klinikum, 10178 Berlin, Germany ,grid.452396.f0000 0004 5937 5237German Center for Cardiovascular Research (DZHK), Partner Site Berlin, Berlin, Germany
| | - Ralph Plehm
- grid.419491.00000 0001 1014 0849Max-Delbrück Center for Molecular Medicine (MDC), Berlin-Buch, Berlin, Germany
| | - Sophie van Linthout
- grid.452396.f0000 0004 5937 5237German Center for Cardiovascular Research (DZHK), Partner Site Berlin, Berlin, Germany ,grid.6363.00000 0001 2218 4662Charité—Universitätsmedizin Berlin, BCRT—Berlin Institute of Health Center for Regenerative Therapies, Berlin, Germany
| | - Felicitas Escher
- grid.7468.d0000 0001 2248 7639Charité—Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Department of Cardiology, Campus Virchow Klinikum, 10178 Berlin, Germany ,grid.452396.f0000 0004 5937 5237German Center for Cardiovascular Research (DZHK), Partner Site Berlin, Berlin, Germany ,grid.486773.9Institute of Cardiac Diagnostics and Therapy, IKDT GmbH, Berlin, Germany
| | - Michael Bader
- grid.419491.00000 0001 1014 0849Max-Delbrück Center for Molecular Medicine (MDC), Berlin-Buch, Berlin, Germany ,grid.452396.f0000 0004 5937 5237German Center for Cardiovascular Research (DZHK), Partner Site Berlin, Berlin, Germany ,grid.7468.d0000 0001 2248 7639Charité—Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), 10178 Berlin, Germany ,grid.4562.50000 0001 0057 2672University of Lübeck, Institute for Biology, Ratzeburger Allee 160, 23562 Lübeck, Germany
| | - Monika Stoll
- grid.16149.3b0000 0004 0551 4246Department of Genetic Epidemiology, Institute of Human Genetics, University Hospital Münster, Münster, Germany ,grid.5012.60000 0001 0481 6099Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, The Netherlands
| | - Dirk Westermann
- grid.452396.f0000 0004 5937 5237German Center for Cardiovascular Research (DZHK), Partner site Hamburg/Kiel/Lübeck, Hamburg, Germany ,grid.13648.380000 0001 2180 3484Clinic for Cardiology, University Heart and Vascular Center Hamburg, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Frank R. Heinzel
- grid.7468.d0000 0001 2248 7639Charité—Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Department of Cardiology, Campus Virchow Klinikum, 10178 Berlin, Germany ,grid.452396.f0000 0004 5937 5237German Center for Cardiovascular Research (DZHK), Partner Site Berlin, Berlin, Germany
| | - Reinhold Kreutz
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Institut für Klinische Pharmakologie und Toxikologie, 10178, Berlin, Germany.
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