dc.contributor.author | Ahmad, Shama | |
dc.contributor.author | Ahmad, Aftab | |
dc.contributor.author | Hendry-Hofer, Tara B. | |
dc.contributor.author | Loader, Joan E. | |
dc.contributor.author | Claycomb, William C. | |
dc.contributor.author | Mozziconacci, Olivier | |
dc.contributor.author | Schoneich, Christian | |
dc.contributor.author | Reisdorph, Nichole | |
dc.contributor.author | Powell, Roger L. | |
dc.contributor.author | Chandler, Joshua D. | |
dc.contributor.author | Day, Brian J. | |
dc.contributor.author | Veress, Livia A. | |
dc.contributor.author | White, Carl W. | |
dc.date.accessioned | 2016-12-16T18:17:41Z | |
dc.date.available | 2016-12-16T18:17:41Z | |
dc.date.issued | 2015-04 | |
dc.identifier.citation | Ahmad, S., Ahmad, A., Hendry-Hofer, T. B., Loader, J. E., Claycomb, W. C., Mozziconacci, O., … White, C. W. (2015). Sarcoendoplasmic Reticulum Ca 2+ ATPase. A Critical Target in Chlorine Inhalation–Induced Cardiotoxicity . Am J Respir Cell Mol Biol, 52(4), 492–502. doi:10.1165/rcmb.2014-0005oc | en_US |
dc.identifier.uri | http://hdl.handle.net/1808/22251 | |
dc.description.abstract | Autopsy specimens from human victims or experimental animals that die due to acute chlorine gas exposure present features of cardiovascular pathology. We demonstrate acute chlorine inhalation–induced reduction in heart rate and oxygen saturation in rats. Chlorine inhalation elevated chlorine reactants, such as chlorotyrosine and chloramine, in blood plasma. Using heart tissue and primary cardiomyocytes, we demonstrated that acute high-concentration chlorine exposure in vivo (500 ppm for 30 min) caused decreased total ATP content and loss of sarcoendoplasmic reticulum calcium ATPase (SERCA) activity. Loss of SERCA activity was attributed to chlorination of tyrosine residues and oxidation of an important cysteine residue, cysteine-674, in SERCA, as demonstrated by immunoblots and mass spectrometry. Using cardiomyocytes, we found that chlorine-induced cell death and damage to SERCA could be decreased by thiocyanate, an important biological antioxidant, and by genetic SERCA2 overexpression. We also investigated a U.S. Food and Drug Administration–approved drug, ranolazine, used in treatment of cardiac diseases, and previously shown to stabilize SERCA in animal models of ischemia–reperfusion. Pretreatment with ranolazine or istaroxime, another SERCA activator, prevented chlorine-induced cardiomyocyte death. Further investigation of responsible mechanisms showed that ranolazine- and istaroxime-treated cells preserved mitochondrial membrane potential and ATP after chlorine exposure. Thus, these studies demonstrate a novel critical target for chlorine in the heart and identify potentially useful therapies to mitigate toxicity of acute chlorine exposure. | en_US |
dc.description.sponsorship | This work was supported by the CounterACT Program, National Institutes of Health, Office of the Director, and the National Institute of Environmental Health Sciences grant U54 ES015678 (C.W.W.), and by Children’s Hospital of Colorado/Colorado School of Mines Pilot Award G0100394 and a Children’s Hospital of Colorado Research Institute’s Pilot Award (S.A.). | en_US |
dc.publisher | American Thoracic Society | en_US |
dc.rights | Copyright © 2015 by the American Thoracic Society | en_US |
dc.subject | Chlorine | en_US |
dc.subject | Inhalation | en_US |
dc.subject | Cardiac | en_US |
dc.subject | Sarcoendoplasmic reticulum Ca2+ATPase | en_US |
dc.subject | Ranolazine | en_US |
dc.title | Sarcoendoplasmic Reticulum Ca2+ ATPase. A Critical Target in Chlorine Inhalation–Induced Cardiotoxicity | en_US |
dc.type | Article | en_US |
kusw.kuauthor | Mozziconacci, Olivier | |
kusw.kuauthor | Schoneich, Christian | |
kusw.kudepartment | Pharmaceutical Chemistry | en_US |
dc.identifier.doi | 10.1165/rcmb.2014-0005OC | en_US |
kusw.oaversion | Scholarly/refereed, publisher version | en_US |
kusw.oapolicy | This item meets KU Open Access policy criteria. | en_US |
dc.rights.accessrights | openAccess | |