2026-04-29T01:00:05Zhttps://repisalud.isciii.es/rest/oai/request

oai:repisalud.isciii.es:20.500.12105/258382025-12-18T12:57:57Zcom_20.500.12105_19586com_20.500.12105_2202col_20.500.12105_19587

00925njm 22002777a 4500 dc Erkens, Ralf author Duse, Dragos Andrei author Brum, Amanda author Chadt, Alexandra author Becher, Stefanie author Siragusa, Mauro author Quast, Christine author Müssig, Johanna author Roden, Michael author Cortese-Krott, Miriam author Ibáñez, Borja author Lammert, Eckhard author Fleming, Ingrid author Jung, Christian author Al-Hasani, Hadi author Heusch, Gerd author Kelm, Malte author 2024-11 Remote ischaemic preconditioning (rIPC) for cardioprotection is severely impaired in diabetes, and therapeutic options to restore it are lacking. The vascular endothelium plays a key role in rIPC. Given that the activity of endothelial nitric oxide synthase (eNOS) is inhibited by proline-rich tyrosine kinase 2 (Pyk2), we hypothesized that pharmacological Pyk2 inhibition could restore eNOS activity and thus restore remote cardioprotection in diabetes. New Zealand obese (NZO) mice that demonstrated key features of diabetes were studied. The consequence of Pyk2 inhibition on endothelial function, rIPC and infarct size after myocardial infarction were evaluated. The impact of plasma from mice and humans with or without diabetes was assessed in isolated buffer perfused murine hearts and aortic rings. Plasma from nondiabetic mice and humans, both subjected to rIPC, caused remote tissue protection. Similar to diabetic humans, NZO mice demonstrated endothelial dysfunction. NZO mice had reduced circulating nitrite levels, elevated arterial blood pressure and a larger infarct size after ischaemia and reperfusion than BL6 mice. Pyk2 increased the phosphorylation of eNOS at its inhibitory site (Tyr656), limiting its activity in diabetes. The cardioprotective effects of rIPC were abolished in diabetic NZO mice. Pharmacological Pyk2 inhibition restored endothelial function and rescued cardioprotective effects of rIPC. Endothelial function and remote tissue protection are impaired in diabetes. Pyk2 is a novel target for treating endothelial dysfunction and restoring cardioprotection through rIPC in diabetes. Br J Pharmacol. 2024 Nov;181(21):4174-4194. https://hdl.handle.net/20.500.12105/25838 38956895 British Journal of Pharmacology Pyk2 acute myocardial infarction diabetes eNOS endothelial dysfunction endothelial function remote ischaemic preconditioning Inhibition of proline-rich tyrosine kinase 2 restores cardioprotection by remote ischaemic preconditioning in type 2 diabetes.