Peripheral blood mononuclear cells of chronic heart failure (CHF) patients produce great amounts of pro-inflammatory cytokines, indicating that circulating cells are activated and could mirror changes occurring in inflammatory cells infiltrating the failing heart. Adenosine is a regulatory metabolite acting through four membrane receptors that are linked to adenylyl cyclase: activation of the A2A receptor subtype has been reported to inhibit cytokine release. Changes of the adenosinergic system may play a role in CHF development. Here we report an increase of A2A receptor expression, density, and coupling to adenylyl cyclase in blood circulating cells of CHF patients. A2A receptor up-regulation was also found in the explanted hearts of these patients, suggesting that changes of peripheral adenosine receptors mirror changes occurring in the disease target organ. In a cohort of patients followed longitudinally after heart transplantation, alterations of peripheral A2A adenosine receptor progressively normalized to control values within 6 months, suggesting that improvement of cardiac performance is accompanied by progressive restoration of a normal adenosinergic system. These results validate the importance of the A2A receptor in human diseases characterized by a marked inflammatory/immune component and suggest that the evaluation of this receptor in peripheral blood cells may be useful for monitoring hemodynamic changes and the efficacy of pharmacological and non-pharmacological treatments in CHF patients.
Changes of peripheral A2A adenosine receptors in chronic heart failure and cardiac transplantation / K. Varani, F. Laghi-Pasini, A. Camurri, P. L. Capecchi, M. Maccherini, F. Diciolla, L. Ceccatelli, P.E. Lazzerini, C. Ulouglu, F. Cattabeni, P.A. Borea, M.P. Abbracchio. - In: THE FASEB JOURNAL. - ISSN 0892-6638. - 17:2(2003), pp. 280-282.
|Titolo:||Changes of peripheral A2A adenosine receptors in chronic heart failure and cardiac transplantation|
ABBRACCHIO, MARIA PIA (Ultimo)
|Settore Scientifico Disciplinare:||Settore BIO/14 - Farmacologia|
|Data di pubblicazione:||2003|
|Appare nelle tipologie:||01 - Articolo su periodico|