Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1997-3-14
pubmed:abstractText
To clarify the relation between macrophage and myofibroblast involvement in various myocardial diseases, the authors investigated the kinetics of these cells in the healing (scar tissue formation) following isoproterenol-induced myocardial injury in rats. Alpha-smooth muscle actin (alpha-SMA) expressing myofibroblasts were seen at the border of the affected area and appeared in the greatest numbers on days 3-7 post-injection, followed by a gradual decrease by day 35. The peak on day 3 was consistent with the timing of the highest proliferative activity of myofibroblasts. The number of ED1-positive macrophages began to increase as early as day 1, reaching a peak on day 3 within the injured myocardium. The expansion of ED1-positive macrophages preceded an increased number of alpha-SMA-positive myofibroblasts suggesting that myofibroblast proliferation and activation may be mediated by factors released by ED1-positive macrophages in response to myocardial injury. The number of ED2-positive tissue-fixed, resident macrophages gradually, increased from day 3 post-injection, and peaked on day 14, but the number of ED2-positive macrophages was consistently fewer than that of ED1-positive macrophages during the 35 day-observation period after the injection. The labelling index of the ED2-positive cells was maximal on day 14, indicative of local proliferation of resident macrophages. In the healing process after myocardial injury, ED1-positive macrophages increase markedly in the early stages: ED2-positive macrophages appear later.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0945-6317
pubmed:author
pubmed:issnType
Print
pubmed:volume
430
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
63-9
pubmed:dateRevised
2003-11-14
pubmed:meshHeading
pubmed:year
1997
pubmed:articleTitle
In vivo responses of macrophages and myofibroblasts in the healing following isoproterenol-induced myocardial injury in rats.
pubmed:affiliation
Laboratory of Toxicologic Pathology, Kanebo Limited, Osaka, Japan.
pubmed:publicationType
Journal Article