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Kadlec AO, Chabowski DS, Ait-Aissa K, Hockenberry JC, Otterson MF, Durand MJ, Freed JK, Beyer AM, Gutterman DD. PGC-1α (Peroxisome Proliferator-Activated Receptor γ Coactivator 1-α) Overexpression in Coronary Artery Disease Recruits NO and Hydrogen Peroxide During Flow-Mediated Dilation and Protects Against Increased Intraluminal Pressure. Hypertension 2017; 70:166-173. [PMID: 28533333 DOI: 10.1161/hypertensionaha.117.09289] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 03/12/2017] [Accepted: 04/20/2017] [Indexed: 12/27/2022]
Abstract
Blood flow through healthy human vessels releases NO to produce vasodilation, whereas in patients with coronary artery disease (CAD), the mediator of dilation transitions to mitochondria-derived hydrogen peroxide (mtH2O2). Excessive mtH2O2 production contributes to a proatherosclerotic vascular milieu. Loss of PGC-1α (peroxisome proliferator-activated receptor γ coactivator 1α) is implicated in the pathogenesis of CAD. We hypothesized that PGC-1α suppresses mtH2O2 production to reestablish NO-mediated dilation in isolated vessels from patients with CAD. Isolated human adipose arterioles were cannulated, and changes in lumen diameter in response to graded increases in flow were recorded in the presence of PEG (polyethylene glycol)-catalase (H2O2 scavenger) or L-NAME (NG-nitro-l-arginine methyl ester; NOS inhibitor). In contrast to the exclusively NO- or H2O2-mediated dilation seen in either non-CAD or CAD conditions, respectively, flow-mediated dilation in CAD vessels was sensitive to both L-NAME and PEG-catalase after PGC-1α upregulation using ZLN005 and α-lipoic acid. PGC-1α overexpression in CAD vessels protected against the vascular dysfunction induced by an acute increase in intraluminal pressure. In contrast, downregulation of PGC-1α in non-CAD vessels produces a CAD-like phenotype characterized by mtH2O2-mediated dilation (no contribution of NO). Loss of PGC-1α may contribute to the shift toward the mtH2O2-mediated dilation observed in vessels from subjects with CAD. Strategies to boost PGC-1α levels may provide a therapeutic option in patients with CAD by shifting away from mtH2O2-mediated dilation, increasing NO bioavailability, and reducing levels of mtH2O2 Furthermore, increased expression of PGC-1α allows for simultaneous contributions of both NO and H2O2 to flow-mediated dilation.
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Affiliation(s)
- Andrew O Kadlec
- From the Department of Physiology (A.O.K., A.M.B., D.D.G.), Division of Cardiology, Department of Medicine (D.S.C., K.A.-A., J.C.H., A.M.B., D.D.G.), Cardiovascular Center (A.O.K., D.S.C., K.A.-A., J.C.H., M.J.D., J.K.F., A.M.B., D.D.G.), Department of Physical Medicine and Rehabilitation (M.J.D.), Division of Colorectal Surgery, Department of Surgery (M.F.O.), and Department of Anesthesiology (J.K.F.), Medical College of Wisconsin, Milwaukee
| | - Dawid S Chabowski
- From the Department of Physiology (A.O.K., A.M.B., D.D.G.), Division of Cardiology, Department of Medicine (D.S.C., K.A.-A., J.C.H., A.M.B., D.D.G.), Cardiovascular Center (A.O.K., D.S.C., K.A.-A., J.C.H., M.J.D., J.K.F., A.M.B., D.D.G.), Department of Physical Medicine and Rehabilitation (M.J.D.), Division of Colorectal Surgery, Department of Surgery (M.F.O.), and Department of Anesthesiology (J.K.F.), Medical College of Wisconsin, Milwaukee
| | - Karima Ait-Aissa
- From the Department of Physiology (A.O.K., A.M.B., D.D.G.), Division of Cardiology, Department of Medicine (D.S.C., K.A.-A., J.C.H., A.M.B., D.D.G.), Cardiovascular Center (A.O.K., D.S.C., K.A.-A., J.C.H., M.J.D., J.K.F., A.M.B., D.D.G.), Department of Physical Medicine and Rehabilitation (M.J.D.), Division of Colorectal Surgery, Department of Surgery (M.F.O.), and Department of Anesthesiology (J.K.F.), Medical College of Wisconsin, Milwaukee
| | - Joseph C Hockenberry
- From the Department of Physiology (A.O.K., A.M.B., D.D.G.), Division of Cardiology, Department of Medicine (D.S.C., K.A.-A., J.C.H., A.M.B., D.D.G.), Cardiovascular Center (A.O.K., D.S.C., K.A.-A., J.C.H., M.J.D., J.K.F., A.M.B., D.D.G.), Department of Physical Medicine and Rehabilitation (M.J.D.), Division of Colorectal Surgery, Department of Surgery (M.F.O.), and Department of Anesthesiology (J.K.F.), Medical College of Wisconsin, Milwaukee
| | - Mary F Otterson
- From the Department of Physiology (A.O.K., A.M.B., D.D.G.), Division of Cardiology, Department of Medicine (D.S.C., K.A.-A., J.C.H., A.M.B., D.D.G.), Cardiovascular Center (A.O.K., D.S.C., K.A.-A., J.C.H., M.J.D., J.K.F., A.M.B., D.D.G.), Department of Physical Medicine and Rehabilitation (M.J.D.), Division of Colorectal Surgery, Department of Surgery (M.F.O.), and Department of Anesthesiology (J.K.F.), Medical College of Wisconsin, Milwaukee
| | - Matthew J Durand
- From the Department of Physiology (A.O.K., A.M.B., D.D.G.), Division of Cardiology, Department of Medicine (D.S.C., K.A.-A., J.C.H., A.M.B., D.D.G.), Cardiovascular Center (A.O.K., D.S.C., K.A.-A., J.C.H., M.J.D., J.K.F., A.M.B., D.D.G.), Department of Physical Medicine and Rehabilitation (M.J.D.), Division of Colorectal Surgery, Department of Surgery (M.F.O.), and Department of Anesthesiology (J.K.F.), Medical College of Wisconsin, Milwaukee
| | - Julie K Freed
- From the Department of Physiology (A.O.K., A.M.B., D.D.G.), Division of Cardiology, Department of Medicine (D.S.C., K.A.-A., J.C.H., A.M.B., D.D.G.), Cardiovascular Center (A.O.K., D.S.C., K.A.-A., J.C.H., M.J.D., J.K.F., A.M.B., D.D.G.), Department of Physical Medicine and Rehabilitation (M.J.D.), Division of Colorectal Surgery, Department of Surgery (M.F.O.), and Department of Anesthesiology (J.K.F.), Medical College of Wisconsin, Milwaukee
| | - Andreas M Beyer
- From the Department of Physiology (A.O.K., A.M.B., D.D.G.), Division of Cardiology, Department of Medicine (D.S.C., K.A.-A., J.C.H., A.M.B., D.D.G.), Cardiovascular Center (A.O.K., D.S.C., K.A.-A., J.C.H., M.J.D., J.K.F., A.M.B., D.D.G.), Department of Physical Medicine and Rehabilitation (M.J.D.), Division of Colorectal Surgery, Department of Surgery (M.F.O.), and Department of Anesthesiology (J.K.F.), Medical College of Wisconsin, Milwaukee
| | - David D Gutterman
- From the Department of Physiology (A.O.K., A.M.B., D.D.G.), Division of Cardiology, Department of Medicine (D.S.C., K.A.-A., J.C.H., A.M.B., D.D.G.), Cardiovascular Center (A.O.K., D.S.C., K.A.-A., J.C.H., M.J.D., J.K.F., A.M.B., D.D.G.), Department of Physical Medicine and Rehabilitation (M.J.D.), Division of Colorectal Surgery, Department of Surgery (M.F.O.), and Department of Anesthesiology (J.K.F.), Medical College of Wisconsin, Milwaukee.
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Zicha J, Dobešová Z, Vokurková M, Rauchová H, Hojná S, Kadlecová M, Behuliak M, Vaněčková I, Kuneš J. Age-dependent salt hypertension in Dahl rats: fifty years of research. Physiol Res 2013; 61:S35-S87. [PMID: 22827876 DOI: 10.33549/physiolres.932363] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Fifty years ago, Lewis K. Dahl has presented a new model of salt hypertension - salt-sensitive and salt-resistant Dahl rats. Twenty years later, John P. Rapp has published the first and so far the only comprehensive review on this rat model covering numerous aspects of pathophysiology and genetics of salt hypertension. When we summarized 25 years of our own research on Dahl/Rapp rats, we have realized the need to outline principal abnormalities of this model, to show their interactions at different levels of the organism and to highlight the ontogenetic aspects of salt hypertension development. Our attention was focused on some cellular aspects (cell membrane function, ion transport, cell calcium handling), intra- and extrarenal factors affecting renal function and/or renal injury, local and systemic effects of renin-angiotensin-aldosterone system, endothelial and smooth muscle changes responsible for abnormal vascular contraction or relaxation, altered balance between various vasoconstrictor and vasodilator systems in blood pressure maintenance as well as on the central nervous and peripheral mechanisms involved in the regulation of circulatory homeostasis. We also searched for the age-dependent impact of environmental and pharmacological interventions, which modify the development of high blood pressure and/or organ damage, if they influence the salt-sensitive organism in particular critical periods of development (developmental windows). Thus, severe self-sustaining salt hypertension in young Dahl rats is characterized by pronounced dysbalance between augmented sympathetic hyperactivity and relative nitric oxide deficiency, attenuated baroreflex as well as by a major increase of residual blood pressure indicating profound remodeling of resistance vessels. Salt hypertension development in young but not in adult Dahl rats can be attenuated by preventive increase of potassium or calcium intake. On the contrary, moderate salt hypertension in adult Dahl rats is attenuated by superoxide scavenging or endothelin-A receptor blockade which do not affect salt hypertension development in young animals.
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Affiliation(s)
- J Zicha
- Centre for Cardiovascular Research, Prague, Czech Republic.
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