Linked Life Data

18599591

Source:http://linkedlifedata.com/resource/pubmed/id/18599591

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2008-8-8
pubmed:abstractText
Multiple factors lead to the development and maintenance of chronic heart failure. Blockade of ErbB-2 or ErbB-4 tyrosine kinase receptor signaling leads to dilated cardiomyopathy. ErbB-1 may protect the heart against stress-induced injury and its ligand; epidermal growth factor (EGF) increases myocardial contractility, whereas heparin-binding EGF is essential for normal cardiac function. However, the role of ErbB-1 in control of cardiac function is not clear. We hypothesized that ErbB-1 is essential for maintaining adult cardiac function. Using the ecdysone-inducible gene expression system, we expressed humanized cardiomyocyte-specific dominant-negative ErbB-1 mutant receptors (hErbB-1-mut) in young adult mice that block endogenous cardiac ErbB-1 signaling. Molecular, morphological, and physiological tests (under anesthesia) were performed. As a result, hErbB-1-mut was expressed selectively in cardiomyocytes leading to the blockade of endogenous ErbB-1 phosphorylation and ErbB-2 transphosphorylation. An increase in left ventricular mass, atrial natriuretic factor expression, and histological changes were indicative of cardiac hypertrophy. Cardiac dilation, numerous cardiac lesions, and the loss of the clear boundary between cardiac fibrils were noted histologically. Early and long-term hErbB-1-mut induction led to a significant decrease in fractional shortening and to significant increases in left ventricular end-systolic diameter and volume. The treatment of adenylyl cyclase activator (forskolin analog) normalized the depressed cardiac function. Resting cardiac function returned to normal after reversing mutant expression. A 4-day survival rate of transverse-aortic constricted hErbB-1-mut mice was only 20% compared with 100% in controls. In conclusion, these observations indicate that the blockade of cardiac ErbB-1 signaling leads to the blockade of ErbB-2 signaling and that together they result in cardiac dysfunction.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0363-6135
pubmed:author
pubmed:issnType
Print
pubmed:volume
295
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
H543-54
pubmed:dateRevised
2010-2-12
pubmed:meshHeading
pubmed-meshheading:18599591-Adenylate Cyclase, pubmed-meshheading:18599591-Animals, pubmed-meshheading:18599591-Cardiomyopathy, Dilated, pubmed-meshheading:18599591-Cardiotonic Agents, pubmed-meshheading:18599591-Dobutamine, pubmed-meshheading:18599591-Female, pubmed-meshheading:18599591-Forskolin, pubmed-meshheading:18599591-Heart Failure, pubmed-meshheading:18599591-Male, pubmed-meshheading:18599591-Mice, pubmed-meshheading:18599591-Mice, Inbred C57BL, pubmed-meshheading:18599591-Mice, Inbred DBA, pubmed-meshheading:18599591-Mice, Transgenic, pubmed-meshheading:18599591-Mutation, pubmed-meshheading:18599591-Myocardial Contraction, pubmed-meshheading:18599591-Myocytes, Cardiac, pubmed-meshheading:18599591-Phenotype, pubmed-meshheading:18599591-Phosphorylation, pubmed-meshheading:18599591-Receptor, Epidermal Growth Factor, pubmed-meshheading:18599591-Receptor, erbB-2, pubmed-meshheading:18599591-Signal Transduction, pubmed-meshheading:18599591-Time Factors, pubmed-meshheading:18599591-Ventricular Dysfunction, Left
pubmed:year
2008
pubmed:articleTitle
Cardiac ErbB-1/ErbB-2 mutant expression in young adult mice leads to cardiac dysfunction.
pubmed:affiliation
Dept. of Cellular and Integrative Physiology, Univ. of Nebraska Medical Ctr., Omaha, NE 68198-5850, USA.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't