Treatment with alpha-melanocyte stimulating hormone preserves calcium regulatory proteins in rat heart allografts

Brain, Behavior, and Immunity
Gualtiero ColomboAnna Catania

Abstract

Prevention of graft dysfunction is a major objective in transplantation medicine. Previous research on experimental heart transplantation indicated that treatment with the immunomodulatory peptide alpha-melanocyte stimulating hormone (alpha-MSH) improves histopathology, prolongs allograft survival, and reduces expression of the main tissue injury mediators. Because calcium-handling is critical in heart graft function, we determined the effects of transplantation injury and influences of alpha-MSH treatment on representative calcium regulatory proteins in rat heart allografts. Hearts from Brown Norway rats were transplanted heterotopically into MHC incompatible Lewis rats. Ca(2+)/calmodulin-dependent protein kinase II (CaMKII), protein kinase C epsilon (PKC epsilon), sarcoplasmic/endoplasmic reticulum calcium-ATPase 2 (SERCA2a), arrestin-beta1 (Arrb1), cholinergic receptor M2 (Chrm2), and inositol 1,4,5-triphosphate receptor 1 (InsP(3)R1) were examined in: (1) non-transplanted donor hearts; (2) allografts from saline-treated rats; and (3) allografts from rats treated with the synthetic alpha-MSH analog Nle4-DPhe7-alpha-MSH (NDP-alpha-MSH) (100 microg i.p. every 12h). Transplantation injury was associated with severe reduction in...Continue Reading

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Citations

Apr 26, 2012·Frontiers in Neuroendocrinology·Daniela GiulianiSalvatore Guarini
Jul 5, 2008·Brain, Behavior, and Immunity·Mario Delgado, Doina Ganea
Oct 20, 2015·Biomolecular Concepts·Sheila LeoneAlfio Bertolini
Sep 16, 2017·BioMed Research International·Roger Maldonado-RuizAlberto Camacho

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