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Coronary collateral growth–back to the future.

The coronary collateral circulation is critically important as an adaptation of the heart to prevent the damage from ischemic insults. In their native state, collaterals in the heart would be classified as part of the microcirculation, existing as…

Tags: 2012, Chilian William M, Collateral Circulation/*physiology, Coronary Artery Disease/physiopathology/therapy, Coronary Circulation/physiology, Department of Integrative Medical Sciences, Dong Feng, Humans, Journal of molecular and cellular cardiology, Logan Suzanna, Mayorga Maritza, Myocardial Ischemia/physiopathology/therapy, NEOMED College of Medicine, Neovascularization, Ohanyan Vahagn, Penn Marc S, Physiologic/physiology, Pung Yuh Fen, Yin Liya

Impaired coronary metabolic dilation in the metabolic syndrome is linked to mitochondrial dysfunction and mitochondrial DNA damage.

Mitochondrial dysfunction in obesity and diabetes can be caused by excessive production of free radicals, which can damage mitochondrial DNA. Because mitochondrial DNA plays a key role in the production of ATP necessary for cardiac work, we…

Corruption of coronary collateral growth in metabolic syndrome: Role of oxidative stress.

The myocardium adapts to ischemic insults in a variety of ways. One adaptation is the phenomenon of acute preconditioning, which can greatly ameliorate ischemic damage. However, this effect wanes within a few hours and does not confer chronic…

Tags: 2010, angiogenesis, Arteriogenesis, Chilian William M, Department of Integrative Medical Sciences, Mitochondria, NEOMED College of Medicine, Pung Yuh Fen, Redox-dependent signaling, World journal of cardiology

The JCR:LA-cp rat: a novel rodent model of cystic medial necrosis.

Although there are multiple rodent models of the metabolic syndrome, very few develop vascular complications. In contrast, the JCR:LA-cp rat develops both metabolic syndrome and early atherosclerosis in predisposed areas. However, the pathology of…

Resolution of mitochondrial oxidative stress rescues coronary collateral growth in Zucker obese fatty rats.

OBJECTIVE: We have previously found abrogated ischemia-induced coronary collateral growth in Zucker obese fatty (ZOF) rats compared with Zucker lean (ZLN) rats. Because ZOF rats have structural abnormalities in their mitochondria suggesting…

Tags: 2012, Animal, Animals, Antioxidants/*pharmacology, Arteriosclerosis, thrombosis, and vascular biology, Chilian William M, Collateral Circulation/*drug effects/physiology, Coronary Vessels/drug effects/*growth & development, Department of Integrative Medical Sciences, Disease Models, Guarini Giacinta, Hafemeister Jennifer, Heart/*drug effects/physiology, Lipid Peroxidation/drug effects/physiology, Lipid Peroxides/metabolism, Male, Metabolic Syndrome/*metabolism/physiopathology, Mitochondria, Mitochondrial Proteins/metabolism, Murphy Michael P, NEOMED College of Medicine, Obesity/*metabolism/physiopathology, Ohanyan Vahagn, Organophosphorus Compounds/pharmacology, Oxidative Stress/*drug effects/physiology, Piperidines/pharmacology, Pung Yuh Fen, Rats, Reactive Oxygen Species/metabolism, Rocic Petra, Smith Robin A J, Ubiquinone/pharmacology, Yin Liya, Zucker

The role of mitochondrial bioenergetics and reactive oxygen species in coronary collateral growth.

Coronary collateral growth is a process involving coordination between growth factors expressed in response to ischemia and mechanical forces. Underlying this response is proliferation of vascular smooth muscle and endothelial cells, resulting in an…

Mitochondrial oxidative stress corrupts coronary collateral growth by activating adenosine monophosphate activated kinase-alpha signaling.

OBJECTIVE: Our goal was to determine the mechanism by which mitochondrial oxidative stress impairs collateral growth in the heart. APPROACH AND RESULTS: Rats were treated with rotenone (mitochondrial complex I inhibitor that increases reactive oxygen…

Tags: 2013, AMP-Activated Protein Kinases/*metabolism, Animal, Animals, Arteriosclerosis, thrombosis, and vascular biology, Body Weight/physiology, Cells, Chen Chwen-Lih, Chen Yeong-Renn, Chilian William M, Collateral Circulation, Coronary Circulation, Coronary Vessels/cytology/*enzymology, Cultured, Department of Integrative Medical Sciences, Disease Models, Dyck Jason R B, Endothelial Cells/cytology/*enzymology, Enrick Molly, Hardwick James P, Humans, Inbred WKY, Ischemia/metabolism/pathology, Kolz Christopher, Mitochondria, Mitochondria/drug effects/*metabolism, Myocardium/enzymology/pathology, NEOMED College of Medicine, Oxidative Stress/*physiology, Pung Yuh Fen, Rats, reactive oxygen species, Rotenone/pharmacology, Sam Wai Johnn, Signal Transduction/*physiology, Stevanov Kelly, Thakker Prashanth, TOR Serine-Threonine Kinases/metabolism, Uncoupling Agents/pharmacology, Yin Liya

Induction of vascular progenitor cells from endothelial cells stimulates coronary collateral growth.

RATIONALE: A well-developed coronary collateral circulation improves the morbidity and mortality of patients following an acute coronary occlusion. Although regenerative medicine has great potential in stimulating vascular growth in the heart, to…

Tags: *Collateral Circulation, *Coronary Circulation, 2012, Animal, Animals, Bailey Erin, Biomarkers/metabolism, Cell Differentiation, Cell Lineage, Cells, Chilian William M, Circulation research, Coronary Occlusion/genetics/metabolism/pathology/physiopathology/*surgery, Coronary Vessels/metabolism/pathology/*physiopathology, Cultured, Delucia Angelo, Department of Integrative Medical Sciences, Developmental, Disease Models, Endothelial Cells/metabolism/pathology/*transplantation, Enrick Molly, Epigenesis, Gene Expression Profiling, Gene Expression Regulation, Genetic, Guarini Giacinta, Induced Pluripotent Stem Cells/metabolism/*transplantation, Kolz Christopher L, Mice, Muscle, Myocytes, NEOMED College of Medicine, Neovascularization, Ohanyan Vahagn, Physiologic, Pung Yuh Fen, Rats, Regenerative Medicine/methods, Regional Blood Flow, Reverse Transcriptase Polymerase Chain Reaction, SCID, Smooth, Smooth Muscle/metabolism/pathology/*transplantation, Sprague-Dawley, Stevanov Kelly, Teratoma/metabolism/pathology, Time Factors, Transcription Factors/genetics/metabolism, Transduction, Vascular/metabolism/pathology/*physiopathology, Yin Liya

Redox-dependent mechanisms in coronary collateral growth: the "redox window" hypothesis.

This review addresses the complexity of coronary collateral growth from the aspect of redox signaling and introduces the concept of a "redox window" in the context of collateral growth. In essence, the redox window constitutes a range in the redox…

Tags: 2009, Angiotensin II/physiology, Animals, Antioxidants & redox signaling, Belmadani Souad, Carrao Ana Catarina Ribeiro, Chilian William M, Coronary Vessels/*growth & development/metabolism, Department of Integrative Medical Sciences, Humans, NEOMED College of Medicine, Ohanyan Vahagn, Oxidation-Reduction, Pung Yuh Fen, Reactive Oxygen Species/metabolism, Rocic Petra, Yun June

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