Linked Life Data

15177915

Source:http://linkedlifedata.com/resource/pubmed/id/15177915

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-3
pubmed:dateCreated
2004-6-4
pubmed:abstractText
Angiotensin II (Ang II) has a significant role in regulating cardiac homeostasis through humoral, autocrine and paracrine pathways, via binding to the plasma membrane AT1 receptor. Recent literature has provided evidence for intracrine growth effects of Ang II in some cell lines, which does not involve interaction with the plasma membrane receptor. We hypothesized that such intracrine mechanisms are operative in the heart and likely participate in the cardiac hypertrophy induced by Ang II. Adenoviral and plasmid vectors were constructed to express Ang II peptide intracellularly. Neonatal rat ventricular myocytes (NRVMs) infected with the adenoviral vector showed significant hypertrophic growth as determined by cell size, protein synthesis and enhanced cytoskeletal arrangement. Adult mice injected with the plasmid vector developed significant cardiac hypertrophy after 48 h, without an increase in blood pressure or plasma Ang II levels. This was accompanied by increased transcription of transforming growth factor-beta (TGF-beta) and insulin-like growth factor-1 (IGF-1) genes. Losartan did not block the growth effects, excluding the involvement of extracellular Ang II and the plasma membrane AT1 receptor. These data demonstrate a previously unknown growth mechanism of Ang II in the heart, which should be considered when designing therapeutic strategies to block Ang II actions.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0167-0115
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
120
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
5-13
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
2004
pubmed:articleTitle
Evidence of a novel intracrine mechanism in angiotensin II-induced cardiac hypertrophy.
pubmed:affiliation
Division of Molecular Cardiology, Cardiovascular Research Institute, The Texas A&M University System Health Science Center, College of Medicine, 1901 S 1st Street, Building 205, Temple 76504, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.