{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T16:45:24Z","timestamp":1760028324436},"reference-count":38,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2007,1,25]],"date-time":"2007-01-25T00:00:00Z","timestamp":1169683200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Cathet Cardio Intervent"],"published-print":{"date-parts":[[2007,2]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p><jats:styled-content>Background<\/jats:styled-content>: Acute MI results in cardiomyocyte death, left ventricular (LV) dysfunction and adverse remodeling. The use of growth factors may prevent this. The aim of this study was to assess early and delayed administration of granulocyte colony\u2010stimulating factor (G\u2010CSF) in a porcine model of myocardial infarction (MI) and reperfusion.<jats:styled-content>Methods<\/jats:styled-content>: MI was induced by balloon occlusion followed by reperfusion. There were 3 groups: Control (n = 11), Early (n = 17), and Delayed treatment (n = 8). The Early group received G\u2010CSF 10 \u03bcg\/kg\/d every other day for 20 days beginning immediately. The Delayed group received G\u2010CSF 10 \u03bcg\/kg\/d daily for 10 days beginning on day 5. Magnetic resonance imaging was performed on days 5 and 56. LV end\u2010diastolic volumes (EDV), end\u2010systolic volumes, ejection fraction, expansion index, sphericity index, thinning ratio, and infarct mass were calculated. Histology was analyzed at 56 days. <jats:styled-content>Results<\/jats:styled-content>: At 56 days the change in EDV was 53% less in the Early (p = 0.005) and 24% greater in the Delayed (p = NS) group versus Control. The Delayed group also showed a 60% increase in normalized infarct mass (p = 0.055) and an 88% increase in expansion index (p = 0.003). Both groups had significantly less capillary density in the infarct border zone. The Delayed also had decreased arteriolar density in the mid scar. <jats:styled-content>Conclusions<\/jats:styled-content>: Early treatment with G\u2010CSF after MI decreases ventricular dilatation, while delayed treatment has a deleterious effect on LV remodeling. This may be related to changes in myocardial vascularity. The effects of G\u2010CSF therapy and its dose timing help to elucidate the results of recent human trials. \u00a9 2006 Wiley\u2010Liss, Inc.<\/jats:p>","DOI":"10.1002\/ccd.20925","type":"journal-article","created":{"date-parts":[[2007,1,25]],"date-time":"2007-01-25T18:18:59Z","timestamp":1169749139000},"page":"257-266","source":"Crossref","is-referenced-by-count":15,"title":["Granulocyte\u2010colony stimulating factor administration after myocardial infarction in a porcine ischemia\u2010reperfusion model: Functional and pathological effects of dose timing"],"prefix":"10.1002","volume":"69","author":[{"given":"Nirat","family":"Beohar","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"James D.","family":"Flaherty","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Charles 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