Oxidative stress and protein oxidation in the brain of water drinking and alcohol drinking rats administered the HIV envelope protein, gp120

Ashok K Singh, Shveta Gupta, Yin Jiang

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Possible roles of oxidative stress and protein oxidation on alcohol-induced augmentation of cerebral neuropathy in gp120 administered alcohol preferring rats drinking either pure water (W rats) or a free-choice ethanol and water (E rats) for 90 days. This study showed that peripherally administered gp120 accumulated into the brain, liver, and RBCs samples from water drinking - gp120 administered rats (Wg rats) and ethanol drinking - gp120 administered rats (Eg rats), although gp120 levels in samples from Eg rats were significantly greater than the levels in samples from Wg rats. The brain samples from ethanol drinking-saline administered (EC) and Wg rats exhibited comparable levels of free radicals that were significantly lower than the levels in Eg rats. Peroxiredoxin-I (PrxI) activity in the brain samples exhibited the following pattern: Wg > > WC > EC > Eg. Total protein-carbonyl and carbonylated hippocampal cholinergic neurostimulating peptide precursor protein levels, but not N-acetylaspartate or N-acetyl aspartylglutamate or total protein-thiol levels, paralleled the free radical levels in the brain of all four groups. This suggests PrxI inhibition may be more sensitive indicator of oxidative stress than measuring free radicals or metabolites. As PrxI oxidation in WC, Wg, and EC rats was reversible, while PrxI oxidation in Eg rats was not, we suggest that alcohol drinking and gp120 together hyperoxidized and inactivated PrxI that suppressed free radical neutralization in the brain of Eg rats. In conclusion, chronic alcohol drinking, by carbonylating and hyperoxidizing free radical neutralization proteins, augmented the gp120-induced oxidative stress that may be associated with an increase in severity of the brain neuropathy.

Original languageEnglish (US)
Pages (from-to)1478-1493
Number of pages16
JournalJournal of Neurochemistry
Volume104
Issue number6
DOIs
StatePublished - Mar 1 2008

Fingerprint

HIV Envelope Protein gp120
Oxidative stress
Heat-Shock Proteins
Drinking Water
Alcohol Drinking
Rats
Brain
Oxidative Stress
Alcohols
Oxidation
Peroxiredoxins
Drinking
Ethanol
Free Radicals
aspartylglutamate
Proteins
Phosphatidylethanolamine Binding Protein
Water
Metabolites
Sulfhydryl Compounds

Keywords

  • Apoptosis
  • Ethanol
  • Human immunodeficiency virus envelop protein gp120
  • Oxidative stress
  • Peroxiredoxin-I
  • Protein carbonylation

Cite this

Oxidative stress and protein oxidation in the brain of water drinking and alcohol drinking rats administered the HIV envelope protein, gp120. / Singh, Ashok K; Gupta, Shveta; Jiang, Yin.

In: Journal of Neurochemistry, Vol. 104, No. 6, 01.03.2008, p. 1478-1493.

Research output: Contribution to journalArticle

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