Linked Life Data

10812015

Source:http://linkedlifedata.com/resource/pubmed/id/10812015

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
2000-6-27
pubmed:abstractText
This study investigated the effects of long-term exposure of steady (19 dyne/cm2), 1-Hz non-reversing pulsatile (19+/-6 dyne/cm2) and 1-Hz purely oscillatory (0+/-19 dyne/cm2) shear stress on endothelial transforming growth factor-beta1 (TGF-beta1) mRNA expression. Cultured bovine aortic endothelial cells (BAECs) were systematically exposed to the three flow conditions for periods of 2, 6, 12 and 24 h, and relative differences in TGF-beta1 mRNA levels were measured by semi-quantitative RT-PCR. In response to steady shear stress, TGF-beta1 mRNA levels normalized to no-flow controls were 1.24, 1.42, 1.30 and 1.47 at the 2-, 6-, 12- and 24-h time points, respectively. In response to non-reversing pulsatile flow, these levels were 1.49, 1.64, 1.64 and 1.73, while the respective transcript levels for oscillatory flow were 1.33, 1.12, 1.12 and 1. 93. These results indicate that BAEC TGF-beta1 mRNA was up-regulated with the kinetics of the up-regulation faster for steady and non-reversing pulsatile flow than for oscillatory flow. Given the preferential localization of early atherosclerotic lesions in arterial regions exposed to low and/or oscillatory shear stress and the implication of TGF-beta1 as an athero-protective gene, these results are consistent with the notion that regions transiently exposed to oscillatory flow may be particularly prone to atherosclerosis.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
1107-3756
pubmed:author
pubmed:issnType
Print
pubmed:volume
5
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
635-41
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
2000
pubmed:articleTitle
Influence of different forms of fluid shear stress on vascular endothelial TGF-beta1 mRNA expression.
pubmed:affiliation
Department of Mechanical and Aeronautical Engineering, University of California, Davis 95616, USA
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't