ArticleThe Journal of physiology2004
Zinc is both an intracellular and extracellular regulator of KATP channel function.
Article in The Journal of physiology, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers.
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Who cites it
32 citing papers in PubMed, 65 citations in OpenAlex.
- Zinc homeostasis and redox alterations in obesity.Frontiers in endocrinology · 2023Review
- Zinc drives vasorelaxation by acting in sensory nerves, endothelium and smooth muscle.Nature communications · 2021Article
- The type 2 diabetes gene product STARD10 is a phosphoinositide-binding protein that controls insulin secretory granule biogenesis.Molecular metabolism · 2020Article
- Implication of Potassium Channels in the Pathophysiology of Pulmonary Arterial Hypertension.Biomolecules · 2020Review
- Zinc and its regulators in pancreas.Inflammopharmacology · 2019Review
- Increased free ZnJournal of cellular and molecular medicine · 2018Article
- Snapshot Hyperspectral Light-Sheet Imaging of Signal Transduction in Live Pancreatic Islets.Biophysical journal · 2016Article
- Zinc as Allosteric Ion Channel Modulator: Ionotropic Receptors as Metalloproteins.International journal of molecular sciences · 2016Review
- Genetic alteration of the metal/redox modulation of Cav3.2 T-type calcium channel reveals its role in neuronal excitability.The Journal of physiology · 2016Article
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- The direct modulatory activity of zinc toward ion channels.Integrative medicine research · 2015Review
- The Critical Roles of Zinc: Beyond Impact on Myocardial Signaling.The Korean journal of physiology & pharmacology : official journal of the Korean Physiological Society and the Korean Society of Pharmacology · 2015Review
- The physiological role of drug transporters.Protein & cell · 2015Review
- Zn(2+) induces hyperpolarization by activation of a K(+) channel and increases intracellular Ca(2+) and pH in sea urchin spermatozoa.Developmental biology · 2014Review
- Insulin excites anorexigenic proopiomelanocortin neurons via activation of canonical transient receptor potential channels.Cell metabolism · 2014Article
- Zinc and insulin in pancreatic beta-cells.Endocrine · 2014Review
- Effects of zinc supplementation and zinc chelation on in vitro β-cell function in INS-1E cells.BMC research notes · 2014Article
- Divalent cations modulate TMEM16A calcium-activated chloride channels by a common mechanism.The Journal of membrane biology · 2013Article
- K(ATP) channels and islet hormone secretion: new insights and controversies.Nature reviews. Endocrinology · 2013Review
Corrections and comments
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Authors and funding
5 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Extracellular Zn(2+) has been identified as an activator of pancreatic K(ATP) channels. We further examined the action of Zn(2+) on recombinant K(ATP) channels formed with the inward rectifier K(+) channel subunit Kir6.2 associated with either the pancreatic/neuronal sulphonylurea receptor 1 (SUR1) subunit or the cardiac SUR2A subunit. Zn(2+), applied at either the extracellular or intracellular side of the membrane appeared as a potent, reversible activator of K(ATP) channels. External Zn(2+), at micromolar concentrations, activated SUR1/Kir6.2 but induced a small inhibition of SUR2A/Kir6.2 channels. Cytosolic Zn(2+) dose-dependently stimulated both SUR1/Kir6.2 and SUR2A/Kir6.2 channels, with half-maximal effects at 1.8 and 60 microm, respectively, but it did not affect the Kir6.2 subunit expressed alone. These observations point to an action of both external and internal Zn(2+) on the SUR subunit. Effects of internal Zn(2+) were not due to Zn(2+) leaking out, since they were unaffected by the presence of a Zn(2+) chelator on the external side. Similarly, internal chelators did not affect activation by external Zn(2+). Therefore, Zn(2+) is an endogenous K(ATP) channel opener being active on both sides of the membrane, with potentially distinct sites of action located on the SUR subunit. These findings uncover a novel regulatory pathway targeting K(ATP) channels, and suggest a new role for Zn(2+) as an intracellular signalling molecule.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.