A nonthoracotomy myocardial infarction model in an ovine using autologous platelets.

Abstract:

OBJECTIVE:There is a paucity of a biological large animal model of myocardial infarction (MI). We hypothesized that, using autologous-aggregated platelets, we could create an ovine model that was reproducible and more closely mimicked the pathophysiology of MI. METHODS:Mepacrine stained autologous platelets from male sheep (n = 7) were used to create a myocardial infarction via catheter injection into the mid-left anterior descending (LAD) coronary artery. Serial daily serum troponin measurements were taken and tissue harvested on post-embolization day three. Immunofluorescence microscopy was used to detect the mepacrine-stained platelet-induced thrombus, and histology performed to identify three distinct myocardial (infarct, peri-ischemic "border zone," and remote) zones. RESULTS:Serial serum troponin levels (μg/mL) measured 0.0 ± 0.0 at baseline and peaked at 297.4 ± 58.0 on post-embolization day 1, followed by 153.0 ± 38.8 on day 2 and 76.7 ± 19.8 on day 3. Staining confirmed distinct myocardial regions of inflammation and fibrosis as well as mepacrine-stained platelets as the cause of intravascular thrombosis. CONCLUSION:We report a reproducible, unique model of a biological myocardial infarction in a large animal model. This technique can be used to study acute, regional myocardial changes following a thrombotic injury.

journal_name

Biomed Res Int

authors

Spata T,Bobek D,Whitson BA,Parthasarathy S,Mohler PJ,Higgins RS,Kilic A

doi

10.1155/2013/938047

subject

Has Abstract

pub_date

2013-01-01 00:00:00

pages

938047

eissn

2314-6133

issn

2314-6141

journal_volume

2013

pub_type

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