Hydrogen Sulfide Protects against Chemical Hypoxia-Induced Cytotoxicity and Inflammation in HaCaT Cells through Inhibition of ROS/NF-κB/COX-2 Pathway
Open Access
- 14 July 2011
- journal article
- research article
- Published by Public Library of Science (PLoS) in PLOS ONE
- Vol. 6 (7), e21971
- https://doi.org/10.1371/journal.pone.0021971
Abstract
Hydrogen sulfide (H2S) has been shown to protect against oxidative stress injury and inflammation in various hypoxia-induced insult models. However, it remains unknown whether H2S protects human skin keratinocytes (HaCaT cells) against chemical hypoxia-induced damage. In the current study, HaCaT cells were treated with cobalt chloride (CoCl2), a well known hypoxia mimetic agent, to establish a chemical hypoxia-induced cell injury model. Our findings showed that pretreatment of HaCaT cells with NaHS (a donor of H2S) for 30 min before exposure to CoCl2 for 24 h significantly attenuated CoCl2-induced injuries and inflammatory responses, evidenced by increases in cell viability and GSH level and decreases in ROS generation and secretions of IL-1β, IL-6 and IL-8. In addition, pretreatment with NaHS markedly reduced CoCl2-induced COX-2 overexpression and PGE2 secretion as well as intranuclear NF-κB p65 subunit accumulation (the central step of NF-κB activation). Similar to the protective effect of H2S, both NS-398 (a selective COX-2 inhibitor) and PDTC (a selective NF-κB inhibitor) depressed not only CoCl2-induced cytotoxicity, but also the secretions of IL-1β, IL-6 and IL-8. Importantly, PDTC obviously attenuated overexpression of COX-2 induced by CoCl2. Notably, NAC, a ROS scavenger, conferred a similar protective effect of H2S against CoCl2-induced insults and inflammatory responses. Taken together, the findings of the present study have demonstrated for the first time that H2S protects HaCaT cells against CoCl2-induced injuries and inflammatory responses through inhibition of ROS-activated NF-κB/COX-2 pathway.Keywords
This publication has 53 references indexed in Scilit:
- Oxidative Stress Mediates Chemical Hypoxia-Induced Injury and Inflammation by Activating NF-κb-COX-2 Pathway in HaCaT CellsMolecules and Cells, 2011
- Heat shock protein 90 mediates cytoprotection by H2S against chemical hypoxia‐induced injury in PC12 cellsClinical and Experimental Pharmacology and Physiology, 2010
- The Effect of Hydrogen Sulfide Donors on Lipopolysaccharide-Induced Formation of Inflammatory Mediators in MacrophagesAntioxidants and Redox Signaling, 2010
- Novel Insights Into Hydrogen Sulfide–Mediated CytoprotectionAntioxidants and Redox Signaling, 2010
- Hydrogen sulfide impairs keratinocyte cell growth and adhesion inhibiting mitogen-activated protein kinase signalingLaboratory Investigation, 2009
- Human CD133 + Progenitor Cells Promote the Healing of Diabetic Ischemic Ulcers by Paracrine Stimulation of Angiogenesis and Activation of Wnt SignalingCirculation Research, 2009
- Hydrogen sulfide attenuates hepatic ischemia-reperfusion injury: role of antioxidant and antiapoptotic signalingAmerican Journal of Physiology-Heart and Circulatory Physiology, 2008
- Inhibition by epigallocatechin gallate of CoCl2-induced apoptosis in rat PC12 cellsLife Sciences, 2007
- Endogenous hydrogen sulfide regulation of myocardial injury induced by isoproterenolBiochemical and Biophysical Research Communications, 2004
- SOD1 Down-Regulates NF-κB and c-Myc Expression in Mice after Transient Focal Cerebral IschemiaJournal of Cerebral Blood Flow & Metabolism, 2001