Linked Life Data

12754187

Source:http://linkedlifedata.com/resource/pubmed/id/12754187

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2003-12-5
pubmed:abstractText
Angiotensin II (ANG II), generated by activation of local renin-angiotensin systems, is believed to play an important role in tissue repair and remodeling, in part via transforming growth factor-beta (TGF-beta). Angiotensin-converting enzyme (ACE) inhibitors have been shown to abrogate experimental lung injury via a number of potential mechanisms; however, the potentially fibroproliferative role for ANG II in the lung has not been characterized. We hypothesized that, after lung injury, ANG II would stimulate fibroblast procollagen synthesis and promote lung collagen deposition in rats. In vitro, ANG II was a potent inducer of procollagen production in human lung fibroblasts via activation of the type 1 receptor and, at least in part, via the autocrine action of TGF-beta. After bleomycin-induced lung injury, an increase in lung ANG II concentration was observed by day 3 that preceded increases in lung collagen and was maintained until death at day 21. Administration of an ACE inhibitor (ramipril) reduced ACE activity, ANG II concentration, TGF-beta expression, and collagen deposition. Losartan (an ANG II type 1 receptor antagonist) also attenuated the increase in TGF-beta expression and lung collagen deposition. These observations suggest that ANG II, possibly generated locally within the lung, may play an important role in the fibrotic response to acute lung injury, at least in part via the action of TGF-beta. ACE inhibitors and receptor antagonists, already widely used clinically, should be assessed as potential new therapies for fibrotic lung disease.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
1040-0605
pubmed:author
pubmed:issnType
Print
pubmed:volume
286
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
L156-64
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed-meshheading:12754187-Acute Disease, pubmed-meshheading:12754187-Angiotensin II, pubmed-meshheading:12754187-Angiotensin-Converting Enzyme Inhibitors, pubmed-meshheading:12754187-Antibiotics, Antineoplastic, pubmed-meshheading:12754187-Antihypertensive Agents, pubmed-meshheading:12754187-Bleomycin, pubmed-meshheading:12754187-Cell Division, pubmed-meshheading:12754187-Cells, Cultured, pubmed-meshheading:12754187-Collagen, pubmed-meshheading:12754187-Fibroblasts, pubmed-meshheading:12754187-Humans, pubmed-meshheading:12754187-Losartan, pubmed-meshheading:12754187-Lung, pubmed-meshheading:12754187-Peptidyl-Dipeptidase A, pubmed-meshheading:12754187-Procollagen, pubmed-meshheading:12754187-Pulmonary Fibrosis, pubmed-meshheading:12754187-Ramipril, pubmed-meshheading:12754187-Renin-Angiotensin System, pubmed-meshheading:12754187-Transforming Growth Factor beta
pubmed:year
2004
pubmed:articleTitle
Angiotensin II and the fibroproliferative response to acute lung injury.
pubmed:affiliation
Centre for Respiratory Research, Royal Free and University College London Medical School, Rayne Institute, UK. richard.marshall@ucl.ac.uk
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't