Seek and destroy: The ubiquitin-proteasome system in cardiac disease

The ubiquitin-proteasome system (UPS) is a major proteolytic system that regulates the degradation of intracellular proteins in the heart. The UPS regulates the turnover of misfolded and damaged proteins, in addition to numerous cellular processes, by affecting the stability of short-lived proteins...

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Bibliographic Details
Published in:Current hypertension reports 2009-12, Vol.11 (6), p.396-405
Main Authors: Rodríoguez, Jessica E., Schisler, Jonathan C., Patterson, Cam, Willis, Monte S.
Format: Article
Language:English
Subjects:
Animals
Cardiology
Cardiomegaly - enzymology
Cardiomyopathies - enzymology
Cardiomyopathies - etiology
Diabetes Complications - complications
Disease Models, Animal
Family Medicine
General Practice
Heart Diseases - enzymology
Heart Diseases - metabolism
Heart Diseases - physiopathology
Humans
Hypertension
Internal Medicine
Medicine
Medicine & Public Health
Metabolic Diseases
Mice
Myocardial Infarction - enzymology
Myocardial Reperfusion Injury - enzymology
Nephrology
Primary Care Medicine
Proteins
Rats
Ubiquitin - metabolism
Ubiquitin-Protein Ligase Complexes - metabolism
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Summary:The ubiquitin-proteasome system (UPS) is a major proteolytic system that regulates the degradation of intracellular proteins in the heart. The UPS regulates the turnover of misfolded and damaged proteins, in addition to numerous cellular processes, by affecting the stability of short-lived proteins such as transcription factors and cell signaling pathways. The UPS is tightly regulated by the specificity of ubiquitin ligases that recognize specific substrates and direct the addition of ubiquitin, targeting the substrates for degradation by the 26S proteasome. An increasing number of cardiac ubiquitin ligases have been identified, and the number of substrates each one is known to recognize also has increased, expanding their roles. Although mainly cardioprotective roles have been attributed to ubiquitin ligases, new studies have identified exceptions to this rule. This review discusses the mechanisms of cardiac ubiquitin ligases and identifies their role in common cardiac diseases including cardiac hypertrophy, cardiac atrophy, ischemic heart disease, and diabetic cardiomyopathy.
ISSN:1522-6417
1534-3111
DOI:10.1007/s11906-009-0069-7