| HMGB1: the missing link between diabetes mellitus and heart failure. | |
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MedLine Citation:
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PMID: 20703492 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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Diabetes mellitus (DM) is a major independent risk factor for cardiovascular disease, but also leads to cardiomyopathy. However, the etiology of the cardiac disease is unknown. Therefore, the aim of this study was to identify molecular mechanisms underlying diabetic heart disease. High glucose treatment of isolated cardiac fibroblasts, macrophages and cardiomyocytes led to a sustained induction of HMGB1 on the RNA and protein level followed by increased NF-κB binding activity with consecutively sustained TNF-α and IL-6 expression. Short interference (si) RNA knock-down for HMGB1 and RAGE in vitro confirmed the importance of this axis in diabetes-driven chronic inflammation. In a murine model of post-myocardial infarction remodeling in type 1 diabetes, cardiac HMGB1 expression was significantly elevated both on RNA and protein level paralleled by increased expression of pro-inflammatory cytokines up to 10 weeks. HMGB1-specific blockage via box A treatment significantly reduced post-myocardial infarction remodeling and markers of tissue damage in vivo. The protective effects of box A indicated an involvement of the mitogen-activated protein-kinases jun N-terminal kinase and extracellular signal-regulated kinase 1/2, as well as the transcription factor nuclear factor-kappaB. Interestingly, remodeling and tissue damage were not affected by administration of box A in RAGE(-/-) mice. In conclusion, HMGB1 plays a major role in DM and post-I/R remodeling by binding to RAGE, resulting in activation of sustained pro-inflammatory pathways and enhanced myocardial injury. Therefore, blockage of HMGB1 might represent a therapeutic strategy to reduce post-ischemic remodeling in DM. |
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Authors:
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H Christian Volz; Cathrin Seidel; Danai Laohachewin; Ziya Kaya; Oliver J Müller; Sven T Pleger; Felix Lasitschka; Marco E Bianchi; Andrew Remppis; Angelika Bierhaus; Hugo A Katus; Martin Andrassy |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-08-12 |
Journal Detail:
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Title: Basic research in cardiology Volume: 105 ISSN: 1435-1803 ISO Abbreviation: Basic Res. Cardiol. Publication Date: 2010 Nov |
Date Detail:
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Created Date: 2010-10-28 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0360342 Medline TA: Basic Res Cardiol Country: Germany |
Other Details:
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Languages: eng Pagination: 805-20 Citation Subset: IM |
Affiliation:
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Department of Medicine III, University of Heidelberg, INF 410, 69120, Heidelberg, Germany. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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