Volume 44, Issue 4 pp. 553-562
Main Article

Regulation of the calpain and ubiquitin-proteasome systems in a canine model of muscular dystrophy

Kristine M. Wadosky BS

Kristine M. Wadosky BS

Department of Pathology and Laboratory Medicine, University of North Carolina, Chapel Hill, North Carolina, USA

Department of Medicine and Pharmacology, University of North Carolina, Chapel Hill, North Carolina, USA

Search for more papers by this author
Luge Li BS

Luge Li BS

Department of Pathology and Laboratory Medicine, University of North Carolina, Chapel Hill, North Carolina, USA

Department of Medicine and Pharmacology, University of North Carolina, Chapel Hill, North Carolina, USA

Search for more papers by this author
Jessica E. Rodríguez BS

Jessica E. Rodríguez BS

Department of Pathology and Laboratory Medicine, University of North Carolina, Chapel Hill, North Carolina, USA

Department of Medicine and Pharmacology, University of North Carolina, Chapel Hill, North Carolina, USA

Search for more papers by this author
Jin-na Min PhD

Jin-na Min PhD

McAllister Heart Institute, University of North Carolina, Medical Biomolecular Research Building, 103 Mason Farm Road, Chapel Hill, North Carolina 27599-7525, USA

Department of Medicine and Pharmacology, University of North Carolina, Chapel Hill, North Carolina, USA

Search for more papers by this author
Dan Bogan MS

Dan Bogan MS

Department of Pathology and Laboratory Medicine, University of North Carolina, Chapel Hill, North Carolina, USA

Department of Medicine and Pharmacology, University of North Carolina, Chapel Hill, North Carolina, USA

Search for more papers by this author
Jason Gonzalez BS

Jason Gonzalez BS

Department of Exercise and Sports Science, University of North Carolina, Chapel Hill, North Carolina, USA

Department of Medicine and Pharmacology, University of North Carolina, Chapel Hill, North Carolina, USA

Search for more papers by this author
Cam Patterson MD

Cam Patterson MD

McAllister Heart Institute, University of North Carolina, Medical Biomolecular Research Building, 103 Mason Farm Road, Chapel Hill, North Carolina 27599-7525, USA

Department of Medicine and Pharmacology, University of North Carolina, Chapel Hill, North Carolina, USA

Search for more papers by this author
Joe N. Kornegay DVM, PhD

Joe N. Kornegay DVM, PhD

Department of Pathology and Laboratory Medicine, University of North Carolina, Chapel Hill, North Carolina, USA

Department of Medicine and Pharmacology, University of North Carolina, Chapel Hill, North Carolina, USA

Search for more papers by this author
Monte Willis MD, PhD

Corresponding Author

Monte Willis MD, PhD

Department of Pathology and Laboratory Medicine, University of North Carolina, Chapel Hill, North Carolina, USA

McAllister Heart Institute, University of North Carolina, Medical Biomolecular Research Building, 103 Mason Farm Road, Chapel Hill, North Carolina 27599-7525, USA

Department of Medicine and Pharmacology, University of North Carolina, Chapel Hill, North Carolina, USA

Department of Pathology and Laboratory Medicine, University of North Carolina, Chapel Hill, North Carolina, USASearch for more papers by this author
First published: 04 April 2011
Citations: 12

Abstract

Introduction: Previous studies have tested the hypothesis that calpain and/or proteasome inhibition is beneficial in Duchenne muscular dystrophy, based largely on evidence that calpain and proteasome activities are enhanced in the mdx mouse. Methods: mRNA expression of ubiquitin-proteasome and calpain system components were determined using real-time polymerase chain reaction in skeletal muscle and heart in the golden retriever muscular dystrophy model. Similarly, calpain 1 and 2 and proteasome activities were determined using fluorometric activity assays. Results: We found that less than half of the muscles tested had increases in proteasome activity, and only half had increased calpain activity. In addition, transcriptional regulation of the ubiquitin-proteasome system was most pronounced in the heart, where numerous components were significantly decreased. Conclusion: This study illustrates the diversity of expression and activities of the ubiquitin-proteasome and calpain systems, which may lead to unexpected consequences in response to pharmacological inhibition. Muscle Nerve, 2011

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.

click me