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Neuroglobin protects PC12 cells against oxidative stress.

Authors: Li, RC  Morris, MW  Lee, SK  Pouranfar, F  Wang, Y  Gozal, D 
Citation: Li RC, etal., Brain Res. 2008 Jan 23;1190:159-66. Epub 2007 Nov 22.
Pubmed: (View Article at PubMed) PMID:18083144
DOI: Full-text: DOI:10.1016/j.brainres.2007.11.022

Neuroglobin (Ngb) is a newly discovered globin in the vertebrate brain that exhibits neuroprotection against hypoxic/ischemic injury. Hypoxic/ischemic brain injury is associated with accumulation of reactive oxygen species (ROS) and/or reactive nitrogen species (RNS), and antioxidants or ROS scavengers promote cell survival. Therefore, Ngb may serve as a scavenger of toxic reactive species, such as hydrogen peroxide. To examine the anti-oxidative role of neuroglobin, PC12 cells were transfected with wild type and mutant (H64 V/H96A) Ngb for 48 h and then treated with H2O2 (0.1, 0.2 and 0.4 mM) for 6 h. Ngb siRNA decreased the H2O2-induced Ngb expression and exacerbated H2O2-induced cell injury. Transient transfection of Ngb induced dose-dependent increases in Ngb protein expression and did not alter SOD, GPX, and catalase activities. Overexpression of wild type Ngb, but not of mutant Ngb, significantly attenuated H2O2-induced ROS/RNS accumulation and lipid peroxidation, decreased H2O2-induced mitochondrial dysfunction and apoptosis, and promoted overall cell survival. Thus, Ngb plays a protective role against oxidative stress, which appears to be primarily mediated by intrinsic Ngb antioxidant properties.

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RGD Object Information
RGD ID: 9743949
Created: 2015-02-23
Species: All species
Last Modified: 2015-02-23
Status: ACTIVE



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