Protease-activated receptor-2 activation improves efficiency of experimental ischemic preconditioning

Claudio Napoli, Filomena De Nigris, Carla Cicala, John L. Wallace, Giuseppe Caliendo, Mario Condorelli, Vincenzo Santagada, Giuseppe Cirino

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Protease-activated receptor-2 (PAR-2) is a member of seven transmembrane domain G protein-coupled receptors activated by proteolytic cleavage. PAR-2 is involved in inflammatory events and cardiac ischemic reperfusion injury. The objective of this study was to investigate the effects of PAR-2 in experimental myocardial ischemic preconditioning. To monitor the effects of PAR-2, Langendorff-perfused rat hearts were used. These hearts were treated with PAR-2-activating peptide (PAR-2AP) in various protocols. Hemodynamic parameters (left ventricular developed pressure, left ventricular diastolic pressure, coronary flow rate, and heart rate), several indexes of oxidative injury, and neutrophil accumulation were evaluated. We show for the first time that enhanced PAR-2 activation improves efficiency of ischemic preconditioning and reduces cardiac inflammation in the rat heart. Indeed, after PAR-2AP infusion we found that hemodynamic parameters, oxidative injury, infarct size, and neutrophil accumulation were involved. These data support the concept that PAR-2-dependent cell trafficking may regulate signaling responses to cardiac ischemia and inflammation.

Original languageEnglish
JournalAmerican Journal of Physiology - Heart and Circulatory Physiology
Volume282
Issue number6 51-6
Publication statusPublished - 2002

Fingerprint

PAR-2 Receptor
Ischemic Preconditioning
Ventricular Pressure
Neutrophils
Myocardial Ischemic Preconditioning
Hemodynamics
Inflammation
Peptides
Wounds and Injuries
Reperfusion Injury
Ischemia
Heart Rate
Blood Pressure

Keywords

  • Heart
  • Inflammation

ASJC Scopus subject areas

  • Physiology

Cite this

Protease-activated receptor-2 activation improves efficiency of experimental ischemic preconditioning. / Napoli, Claudio; De Nigris, Filomena; Cicala, Carla; Wallace, John L.; Caliendo, Giuseppe; Condorelli, Mario; Santagada, Vincenzo; Cirino, Giuseppe.

In: American Journal of Physiology - Heart and Circulatory Physiology, Vol. 282, No. 6 51-6, 2002.

Research output: Contribution to journalArticle

Napoli, C, De Nigris, F, Cicala, C, Wallace, JL, Caliendo, G, Condorelli, M, Santagada, V & Cirino, G 2002, 'Protease-activated receptor-2 activation improves efficiency of experimental ischemic preconditioning', American Journal of Physiology - Heart and Circulatory Physiology, vol. 282, no. 6 51-6.
Napoli, Claudio ; De Nigris, Filomena ; Cicala, Carla ; Wallace, John L. ; Caliendo, Giuseppe ; Condorelli, Mario ; Santagada, Vincenzo ; Cirino, Giuseppe. / Protease-activated receptor-2 activation improves efficiency of experimental ischemic preconditioning. In: American Journal of Physiology - Heart and Circulatory Physiology. 2002 ; Vol. 282, No. 6 51-6.
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