Neuroglobin protects PC12 cells against oxidative stress

Richard C. Li, Matthew W. Morris, Seung Kwan Lee, Farzan Pouranfar, Yang Wang, David Gozal

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91 Citations (Scopus)

Abstract

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 H 2 O 2 (0.1, 0.2 and 0.4 mM) for 6 h. Ngb siRNA decreased the H 2 O 2 -induced Ngb expression and exacerbated H 2 O 2 -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 H 2 O 2 -induced ROS/RNS accumulation and lipid peroxidation, decreased H 2 O 2 -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.

Original languageEnglish
Pages (from-to)159-166
Number of pages8
JournalBrain Research
Volume1190
Issue number1
DOIs
Publication statusPublished - 2008 Jan 23
Externally publishedYes

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Keywords

  • Neuroglobin
  • Oxidative stress
  • PC12 cell

ASJC Scopus subject areas

  • Neuroscience(all)
  • Molecular Biology
  • Clinical Neurology
  • Developmental Biology

Cite this

Li, R. C., Morris, M. W., Lee, S. K., Pouranfar, F., Wang, Y., & Gozal, D. (2008). Neuroglobin protects PC12 cells against oxidative stress. Brain Research, 1190(1), 159-166. https://doi.org/10.1016/j.brainres.2007.11.022