Linked Life Data

1334144

Source:http://linkedlifedata.com/resource/pubmed/id/1334144

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1993-1-11
pubmed:abstractText
Tumor necrosis factor-alpha (TNF-alpha) has been shown not only to induce the biosynthesis and secretion of collagenase but also to change the organization of cytoskeletal components. In the present study we explore the correlation between the biosynthesis of collagenase (by mRNA hybridization, indirect immunofluorescence and collagenolytic activity), and cytoskeletal reorganization (by rhodamine-phalloidin staining of F-actin) induced in fibroblasts by recombinant TNF (rTNF). In the concentration range of 1-100 ng/ml, rTNF increased extracellular collagenase activity 8-fold and collagenase mRNA 4-fold. In addition, whereas the collagenase mRNA was detected as early as 24 h posttreatment, the appearance of extracellular collagenase activity required 48 h. Using phalloidin to follow the organization of the cytoskeleton we observed that rTNF disrupted the parallel array of stress fibers normally observed in the perinuclear region. In contrast to the time required to affect collagenase synthesis, the effect of rTNF on stress fiber organization occurred as early as 6 h post-treatment. Finally, while the number of cells exhibiting this change increased with increasing concentrations of rTNF, a maximum of about 30% of the cells showed this effect. Interestingly, double staining studies demonstrated that both stress fiber changes and procollagenase production occurred in the same cells. This finding, together with the observation that the cytoskeletal disorganization preceded collagenase gene induction by at least 18 h is consistent with the conclusion that the organizational status of the microfilaments may have a role as a regulator of procollagenase gene expression.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
D
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0022-3484
pubmed:author
pubmed:issnType
Print
pubmed:volume
27
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
562-8
pubmed:dateRevised
2011-11-17
pubmed:meshHeading
pubmed:year
1992
pubmed:articleTitle
Correlation between tumor necrosis factor-alpha (TNF-alpha)-induced cytoskeletal changes and human collagenase gene induction.
pubmed:affiliation
Department of Orthopedic Surgery, University of Connecticut School of Dental Medicine, Farmington.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.