TY - JOUR
T1 - Adenosine a2a receptor-selective stimulation reduces signaling pathways involved in the development of intestine ischemia and reperfusion injury
AU - Di Paola, Rosanna
AU - Melani, Alessia
AU - Esposito, Emanuela
AU - Mazzon, Emanuela
AU - Paterniti, Irene
AU - Bramanti, Placido
AU - Pedata, Felicita
AU - Cuzzocrea, Salvatore
PY - 2010/5
Y1 - 2010/5
N2 - In the present study, we tested the efficacy of treatment with the selective adenosine A2A receptor agonist 2-[p-(2-carboxyethyl)phenylethylamino]- 50-ethylcarboxamidoadenosine (CGS 21680) on ischemia and reperfusion injury of the multivisceral organs. Ischemia and reperfusion injury was induced in mice by clamping both the superior mesenteric artery and the celiac artery for 30 min, followed thereafter by reperfusion. Sixty minutes after reperfusion, animals were killed for histological examination and biochemical studies. Injured vehicle-treated mice developed a significant increase of ileum TNF-α levels, myeloperoxidase activity, and marked histological injury and apoptosis. Ischemia and reperfusion injury of the multivisceral organs was also associated with significant mortality. Reperfused ileum sections from injured vehicle-treated mice showed positive staining for P-selectin and intercellular adhesion molecule 1. The intensity and degree of P-selectin and intercellular adhesion molecule 1 were markedly reduced in tissue sections from injured CGS 21680-treated mice. Ischemia and reperfusion-injured mice that have been treated with CGS 21680 showed also a significant reduction of neutrophil infiltration into the intestine, a reduction of apoptosis, and improved histological status of the intestine and survival. Taken together, our results clearly demonstrate that selective activation of adenosine A2A receptors plays an important role in the regulation of ischemia and reperfusion injury and results put forward the hypothesis that selective activation of adenosine A2A receptors may represent a novel and possible strategy.
AB - In the present study, we tested the efficacy of treatment with the selective adenosine A2A receptor agonist 2-[p-(2-carboxyethyl)phenylethylamino]- 50-ethylcarboxamidoadenosine (CGS 21680) on ischemia and reperfusion injury of the multivisceral organs. Ischemia and reperfusion injury was induced in mice by clamping both the superior mesenteric artery and the celiac artery for 30 min, followed thereafter by reperfusion. Sixty minutes after reperfusion, animals were killed for histological examination and biochemical studies. Injured vehicle-treated mice developed a significant increase of ileum TNF-α levels, myeloperoxidase activity, and marked histological injury and apoptosis. Ischemia and reperfusion injury of the multivisceral organs was also associated with significant mortality. Reperfused ileum sections from injured vehicle-treated mice showed positive staining for P-selectin and intercellular adhesion molecule 1. The intensity and degree of P-selectin and intercellular adhesion molecule 1 were markedly reduced in tissue sections from injured CGS 21680-treated mice. Ischemia and reperfusion-injured mice that have been treated with CGS 21680 showed also a significant reduction of neutrophil infiltration into the intestine, a reduction of apoptosis, and improved histological status of the intestine and survival. Taken together, our results clearly demonstrate that selective activation of adenosine A2A receptors plays an important role in the regulation of ischemia and reperfusion injury and results put forward the hypothesis that selective activation of adenosine A2A receptors may represent a novel and possible strategy.
KW - A receptors
KW - CGS 21680
KW - ICAM
KW - Neutrophil infiltration
KW - SAO
UR - http://www.scopus.com/inward/record.url?scp=77951434131&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77951434131&partnerID=8YFLogxK
U2 - 10.1097/SHK.0b013e3181c997dd
DO - 10.1097/SHK.0b013e3181c997dd
M3 - Article
C2 - 19924030
AN - SCOPUS:77951434131
VL - 33
SP - 541
EP - 551
JO - Shock
JF - Shock
SN - 1073-2322
IS - 5
ER -