Banz Y, Hess OM, Meier P, Korchagina EY, Gordeeva EA, Robson SC, Gajanayake T, Csizmadia E, Mettler D, Haeberli A, Bovin NV, Rieben R. Evaluation of multimeric tyrosine-O-sulfate as a cytoprotectant in an in vivo model of acute myocardial infarction in pigs.
Cardiology 2012;
121:59-70. [PMID:
22398380 DOI:
10.1159/000336485]
[Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2011] [Accepted: 01/13/2012] [Indexed: 11/19/2022]
Abstract
OBJECTIVES
Intracoronary administration of glycosaminoglycan analogs, including the complement inhibitor dextran sulfate, attenuates myocardial ischemia/reperfusion injury (I/R injury). However, dextran sulfate has a distinct anticoagulatory effect, possibly limiting its use in specific situations in vivo. We therefore developed multimeric tyrosine sulfate (sTyr-PAA), a novel, minimally anticoagulatory, fully synthetic non-carbohydrate-containing polyacrylamide conjugate, for in vivo testing in an acute closed-chest porcine model of acute myocardial infarction.
METHODS
Following balloon occlusion of the left anterior descending artery just after the first diagonal branch (60-minute ischemia), sTyr-PAA (approx. 10 mg/kg bodyweight, fraction with strongest complement-inhibitory and minimal anticoagulatory properties, n = 11) or phosphate-buffered saline (controls, n = 9) was administered intracoronarily into ischemic myocardium prior to 120 min of reperfusion.
RESULTS
sTyr-PAA significantly reduced infarct size (from 61.0 ± 12.0% of the ischemic area at risk to 39.4 ± 17.0%), plasma creatine kinase, local complement deposition and tissue factor upregulation, without affecting systemic coagulation. Protection was associated with significantly reduced myocardial neutrophil extravasation and translated into a significant improvement of ejection fraction and left ventricular enddiastolic pressure.
CONCLUSIONS
sTyr-PAA protected significantly against myocardial I/R injury without substantially affecting systemic coagulation. Local intravascular sTyr-PAA administration may prove advantageous in situations where bleeding complications are likely or are to be avoided at all costs.
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