Abstract:
:The administration of the selective β3 adrenergic receptor (β3AR) agonist BRL-37344 protects from myocardial ischemia/reperfusion injury (IRI), although the lack of clinical approval limits its translatability. We tested the cardioprotective effect of mirabegron, the first-in-class β3AR agonist approved for human use. A dose-response study was conducted in 6 pigs to select the highest intravenous dose of mirabegron without significant detrimental hemodynamic effect. Subsequently, closed chest anterior myocardial infarction (45 min ischemia followed by reperfusion) was performed in 26 pigs which randomly received either mirabegron (10 μg/kg) or placebo 5 min before reperfusion. Day-7 cardiac magnetic resonance (CMR) showed no differences in infarct size (35.0 ± 2.0% of left ventricle (LV) vs. 35.9 ± 2.4% in mirabegron and placebo respectively, p = 0.782) or LV ejection fraction (36.3 ± 1.1 vs. 34.6 ± 1.9%, p = 0.430). Consistent results were obtained on day-45 CMR. In conclusion, the intravenous administration of the clinically available selective β3AR agonist mirabegron does not reduce infarct size in a swine model of IRI.
journal_name
J Cardiovasc Transl Resjournal_title
Journal of cardiovascular translational researchauthors
Rossello X,Piñero A,Fernández-Jiménez R,Sánchez-González J,Pizarro G,Galán-Arriola C,Lobo-Gonzalez M,Vilchez JP,García-Prieto J,García-Ruiz JM,García-Álvarez A,Sanz-Rosa D,Ibanez Bdoi
10.1007/s12265-018-9819-8subject
Has Abstractpub_date
2018-08-01 00:00:00pages
310-318issue
4eissn
1937-5387issn
1937-5395pii
10.1007/s12265-018-9819-8journal_volume
11pub_type
杂志文章abstract::Heart failure is a worldwide pandemic influencing 26 million individuals worldwide and is expanding. Imbalanced redox homeostasis in cardiac cells alters the structure and function of the cells, which leads to contractile dysfunction, myocardial hypertrophy, and fibrosis in chronic heart failure. Various targets and a...
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