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Pedrozo Z, Criollo A, Battiprolu PK, Morales CR, Contreras-Ferrat A, Fernández C, Jiang N, Luo X, Caplan MJ, Somlo S, Rothermel BA, Gillette TG, Lavandero S, Hill JA. Polycystin-1 Is a Cardiomyocyte Mechanosensor That Governs L-Type Ca2+ Channel Protein Stability. Circulation 2015; 131:2131-42. [PMID: 25888683 DOI: 10.1161/circulationaha.114.013537] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Accepted: 04/10/2015] [Indexed: 11/16/2022]
Abstract
BACKGROUND L-type calcium channel activity is critical to afterload-induced hypertrophic growth of the heart. However, the mechanisms governing mechanical stress-induced activation of L-type calcium channel activity are obscure. Polycystin-1 (PC-1) is a G protein-coupled receptor-like protein that functions as a mechanosensor in a variety of cell types and is present in cardiomyocytes. METHODS AND RESULTS We subjected neonatal rat ventricular myocytes to mechanical stretch by exposing them to hypo-osmotic medium or cyclic mechanical stretch, triggering cell growth in a manner dependent on L-type calcium channel activity. RNAi-dependent knockdown of PC-1 blocked this hypertrophy. Overexpression of a C-terminal fragment of PC-1 was sufficient to trigger neonatal rat ventricular myocyte hypertrophy. Exposing neonatal rat ventricular myocytes to hypo-osmotic medium resulted in an increase in α1C protein levels, a response that was prevented by PC-1 knockdown. MG132, a proteasomal inhibitor, rescued PC-1 knockdown-dependent declines in α1C protein. To test this in vivo, we engineered mice harboring conditional silencing of PC-1 selectively in cardiomyocytes (PC-1 knockout) and subjected them to mechanical stress in vivo (transverse aortic constriction). At baseline, PC-1 knockout mice manifested decreased cardiac function relative to littermate controls, and α1C L-type calcium channel protein levels were significantly lower in PC-1 knockout hearts. Whereas control mice manifested robust transverse aortic constriction-induced increases in cardiac mass, PC-1 knockout mice showed no significant growth. Likewise, transverse aortic constriction-elicited increases in hypertrophic markers and interstitial fibrosis were blunted in the knockout animals CONCLUSION PC-1 is a cardiomyocyte mechanosensor that is required for cardiac hypertrophy through a mechanism that involves stabilization of α1C protein.
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Affiliation(s)
- Zully Pedrozo
- From Division of Cardiology, Department of Internal Medicine (Z.P., A.C., P.K.B., C.R.M., N.J., X.L., B.A.R., T.G.G., S.L., J.A.H.) and Department of Molecular Biology (B.A.R., J.A.H.), UT Southwestern Medical Center, Dallas, TX; Advanced Center for Chronic Diseases and Centro de Estudios Moleculares de la Célula, Facultad de Medicina & Facultad de Ciencias Químicas y Farmacéuticas, Santiago, Chile (Z.P., A.C.-F., C.F., S.L.); Instituto de Ciencias Biomédicas, Facultad de Medicina (Z.P., S.L.) and Instituto de Investigación en Ciencias Odontológicas, Facultad de Odontología (A.C.), Universidad de Chile, Santiago; and Departments of Cellular and Molecular Physiology (M.J.C.), Internal Medicine (S.S.), and Genetics (S.S.), Yale University School of Medicine, New Haven, CT
| | - Alfredo Criollo
- From Division of Cardiology, Department of Internal Medicine (Z.P., A.C., P.K.B., C.R.M., N.J., X.L., B.A.R., T.G.G., S.L., J.A.H.) and Department of Molecular Biology (B.A.R., J.A.H.), UT Southwestern Medical Center, Dallas, TX; Advanced Center for Chronic Diseases and Centro de Estudios Moleculares de la Célula, Facultad de Medicina & Facultad de Ciencias Químicas y Farmacéuticas, Santiago, Chile (Z.P., A.C.-F., C.F., S.L.); Instituto de Ciencias Biomédicas, Facultad de Medicina (Z.P., S.L.) and Instituto de Investigación en Ciencias Odontológicas, Facultad de Odontología (A.C.), Universidad de Chile, Santiago; and Departments of Cellular and Molecular Physiology (M.J.C.), Internal Medicine (S.S.), and Genetics (S.S.), Yale University School of Medicine, New Haven, CT
| | - Pavan K Battiprolu
- From Division of Cardiology, Department of Internal Medicine (Z.P., A.C., P.K.B., C.R.M., N.J., X.L., B.A.R., T.G.G., S.L., J.A.H.) and Department of Molecular Biology (B.A.R., J.A.H.), UT Southwestern Medical Center, Dallas, TX; Advanced Center for Chronic Diseases and Centro de Estudios Moleculares de la Célula, Facultad de Medicina & Facultad de Ciencias Químicas y Farmacéuticas, Santiago, Chile (Z.P., A.C.-F., C.F., S.L.); Instituto de Ciencias Biomédicas, Facultad de Medicina (Z.P., S.L.) and Instituto de Investigación en Ciencias Odontológicas, Facultad de Odontología (A.C.), Universidad de Chile, Santiago; and Departments of Cellular and Molecular Physiology (M.J.C.), Internal Medicine (S.S.), and Genetics (S.S.), Yale University School of Medicine, New Haven, CT
| | - Cyndi R Morales
- From Division of Cardiology, Department of Internal Medicine (Z.P., A.C., P.K.B., C.R.M., N.J., X.L., B.A.R., T.G.G., S.L., J.A.H.) and Department of Molecular Biology (B.A.R., J.A.H.), UT Southwestern Medical Center, Dallas, TX; Advanced Center for Chronic Diseases and Centro de Estudios Moleculares de la Célula, Facultad de Medicina & Facultad de Ciencias Químicas y Farmacéuticas, Santiago, Chile (Z.P., A.C.-F., C.F., S.L.); Instituto de Ciencias Biomédicas, Facultad de Medicina (Z.P., S.L.) and Instituto de Investigación en Ciencias Odontológicas, Facultad de Odontología (A.C.), Universidad de Chile, Santiago; and Departments of Cellular and Molecular Physiology (M.J.C.), Internal Medicine (S.S.), and Genetics (S.S.), Yale University School of Medicine, New Haven, CT
| | - Ariel Contreras-Ferrat
- From Division of Cardiology, Department of Internal Medicine (Z.P., A.C., P.K.B., C.R.M., N.J., X.L., B.A.R., T.G.G., S.L., J.A.H.) and Department of Molecular Biology (B.A.R., J.A.H.), UT Southwestern Medical Center, Dallas, TX; Advanced Center for Chronic Diseases and Centro de Estudios Moleculares de la Célula, Facultad de Medicina & Facultad de Ciencias Químicas y Farmacéuticas, Santiago, Chile (Z.P., A.C.-F., C.F., S.L.); Instituto de Ciencias Biomédicas, Facultad de Medicina (Z.P., S.L.) and Instituto de Investigación en Ciencias Odontológicas, Facultad de Odontología (A.C.), Universidad de Chile, Santiago; and Departments of Cellular and Molecular Physiology (M.J.C.), Internal Medicine (S.S.), and Genetics (S.S.), Yale University School of Medicine, New Haven, CT
| | - Carolina Fernández
- From Division of Cardiology, Department of Internal Medicine (Z.P., A.C., P.K.B., C.R.M., N.J., X.L., B.A.R., T.G.G., S.L., J.A.H.) and Department of Molecular Biology (B.A.R., J.A.H.), UT Southwestern Medical Center, Dallas, TX; Advanced Center for Chronic Diseases and Centro de Estudios Moleculares de la Célula, Facultad de Medicina & Facultad de Ciencias Químicas y Farmacéuticas, Santiago, Chile (Z.P., A.C.-F., C.F., S.L.); Instituto de Ciencias Biomédicas, Facultad de Medicina (Z.P., S.L.) and Instituto de Investigación en Ciencias Odontológicas, Facultad de Odontología (A.C.), Universidad de Chile, Santiago; and Departments of Cellular and Molecular Physiology (M.J.C.), Internal Medicine (S.S.), and Genetics (S.S.), Yale University School of Medicine, New Haven, CT
| | - Nan Jiang
- From Division of Cardiology, Department of Internal Medicine (Z.P., A.C., P.K.B., C.R.M., N.J., X.L., B.A.R., T.G.G., S.L., J.A.H.) and Department of Molecular Biology (B.A.R., J.A.H.), UT Southwestern Medical Center, Dallas, TX; Advanced Center for Chronic Diseases and Centro de Estudios Moleculares de la Célula, Facultad de Medicina & Facultad de Ciencias Químicas y Farmacéuticas, Santiago, Chile (Z.P., A.C.-F., C.F., S.L.); Instituto de Ciencias Biomédicas, Facultad de Medicina (Z.P., S.L.) and Instituto de Investigación en Ciencias Odontológicas, Facultad de Odontología (A.C.), Universidad de Chile, Santiago; and Departments of Cellular and Molecular Physiology (M.J.C.), Internal Medicine (S.S.), and Genetics (S.S.), Yale University School of Medicine, New Haven, CT
| | - Xiang Luo
- From Division of Cardiology, Department of Internal Medicine (Z.P., A.C., P.K.B., C.R.M., N.J., X.L., B.A.R., T.G.G., S.L., J.A.H.) and Department of Molecular Biology (B.A.R., J.A.H.), UT Southwestern Medical Center, Dallas, TX; Advanced Center for Chronic Diseases and Centro de Estudios Moleculares de la Célula, Facultad de Medicina & Facultad de Ciencias Químicas y Farmacéuticas, Santiago, Chile (Z.P., A.C.-F., C.F., S.L.); Instituto de Ciencias Biomédicas, Facultad de Medicina (Z.P., S.L.) and Instituto de Investigación en Ciencias Odontológicas, Facultad de Odontología (A.C.), Universidad de Chile, Santiago; and Departments of Cellular and Molecular Physiology (M.J.C.), Internal Medicine (S.S.), and Genetics (S.S.), Yale University School of Medicine, New Haven, CT
| | - Michael J Caplan
- From Division of Cardiology, Department of Internal Medicine (Z.P., A.C., P.K.B., C.R.M., N.J., X.L., B.A.R., T.G.G., S.L., J.A.H.) and Department of Molecular Biology (B.A.R., J.A.H.), UT Southwestern Medical Center, Dallas, TX; Advanced Center for Chronic Diseases and Centro de Estudios Moleculares de la Célula, Facultad de Medicina & Facultad de Ciencias Químicas y Farmacéuticas, Santiago, Chile (Z.P., A.C.-F., C.F., S.L.); Instituto de Ciencias Biomédicas, Facultad de Medicina (Z.P., S.L.) and Instituto de Investigación en Ciencias Odontológicas, Facultad de Odontología (A.C.), Universidad de Chile, Santiago; and Departments of Cellular and Molecular Physiology (M.J.C.), Internal Medicine (S.S.), and Genetics (S.S.), Yale University School of Medicine, New Haven, CT
| | - Stefan Somlo
- From Division of Cardiology, Department of Internal Medicine (Z.P., A.C., P.K.B., C.R.M., N.J., X.L., B.A.R., T.G.G., S.L., J.A.H.) and Department of Molecular Biology (B.A.R., J.A.H.), UT Southwestern Medical Center, Dallas, TX; Advanced Center for Chronic Diseases and Centro de Estudios Moleculares de la Célula, Facultad de Medicina & Facultad de Ciencias Químicas y Farmacéuticas, Santiago, Chile (Z.P., A.C.-F., C.F., S.L.); Instituto de Ciencias Biomédicas, Facultad de Medicina (Z.P., S.L.) and Instituto de Investigación en Ciencias Odontológicas, Facultad de Odontología (A.C.), Universidad de Chile, Santiago; and Departments of Cellular and Molecular Physiology (M.J.C.), Internal Medicine (S.S.), and Genetics (S.S.), Yale University School of Medicine, New Haven, CT
| | - Beverly A Rothermel
- From Division of Cardiology, Department of Internal Medicine (Z.P., A.C., P.K.B., C.R.M., N.J., X.L., B.A.R., T.G.G., S.L., J.A.H.) and Department of Molecular Biology (B.A.R., J.A.H.), UT Southwestern Medical Center, Dallas, TX; Advanced Center for Chronic Diseases and Centro de Estudios Moleculares de la Célula, Facultad de Medicina & Facultad de Ciencias Químicas y Farmacéuticas, Santiago, Chile (Z.P., A.C.-F., C.F., S.L.); Instituto de Ciencias Biomédicas, Facultad de Medicina (Z.P., S.L.) and Instituto de Investigación en Ciencias Odontológicas, Facultad de Odontología (A.C.), Universidad de Chile, Santiago; and Departments of Cellular and Molecular Physiology (M.J.C.), Internal Medicine (S.S.), and Genetics (S.S.), Yale University School of Medicine, New Haven, CT
| | - Thomas G Gillette
- From Division of Cardiology, Department of Internal Medicine (Z.P., A.C., P.K.B., C.R.M., N.J., X.L., B.A.R., T.G.G., S.L., J.A.H.) and Department of Molecular Biology (B.A.R., J.A.H.), UT Southwestern Medical Center, Dallas, TX; Advanced Center for Chronic Diseases and Centro de Estudios Moleculares de la Célula, Facultad de Medicina & Facultad de Ciencias Químicas y Farmacéuticas, Santiago, Chile (Z.P., A.C.-F., C.F., S.L.); Instituto de Ciencias Biomédicas, Facultad de Medicina (Z.P., S.L.) and Instituto de Investigación en Ciencias Odontológicas, Facultad de Odontología (A.C.), Universidad de Chile, Santiago; and Departments of Cellular and Molecular Physiology (M.J.C.), Internal Medicine (S.S.), and Genetics (S.S.), Yale University School of Medicine, New Haven, CT
| | - Sergio Lavandero
- From Division of Cardiology, Department of Internal Medicine (Z.P., A.C., P.K.B., C.R.M., N.J., X.L., B.A.R., T.G.G., S.L., J.A.H.) and Department of Molecular Biology (B.A.R., J.A.H.), UT Southwestern Medical Center, Dallas, TX; Advanced Center for Chronic Diseases and Centro de Estudios Moleculares de la Célula, Facultad de Medicina & Facultad de Ciencias Químicas y Farmacéuticas, Santiago, Chile (Z.P., A.C.-F., C.F., S.L.); Instituto de Ciencias Biomédicas, Facultad de Medicina (Z.P., S.L.) and Instituto de Investigación en Ciencias Odontológicas, Facultad de Odontología (A.C.), Universidad de Chile, Santiago; and Departments of Cellular and Molecular Physiology (M.J.C.), Internal Medicine (S.S.), and Genetics (S.S.), Yale University School of Medicine, New Haven, CT.
| | - Joseph A Hill
- From Division of Cardiology, Department of Internal Medicine (Z.P., A.C., P.K.B., C.R.M., N.J., X.L., B.A.R., T.G.G., S.L., J.A.H.) and Department of Molecular Biology (B.A.R., J.A.H.), UT Southwestern Medical Center, Dallas, TX; Advanced Center for Chronic Diseases and Centro de Estudios Moleculares de la Célula, Facultad de Medicina & Facultad de Ciencias Químicas y Farmacéuticas, Santiago, Chile (Z.P., A.C.-F., C.F., S.L.); Instituto de Ciencias Biomédicas, Facultad de Medicina (Z.P., S.L.) and Instituto de Investigación en Ciencias Odontológicas, Facultad de Odontología (A.C.), Universidad de Chile, Santiago; and Departments of Cellular and Molecular Physiology (M.J.C.), Internal Medicine (S.S.), and Genetics (S.S.), Yale University School of Medicine, New Haven, CT.
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