Coenzyme Q10 modulates cognitive impairment against intracerebroventricular injection of streptozotocin in rats

Tauheed Ishrat, Mohammad Badruzzaman Khan, MD Nasrul Hoda, Seema Yousuf, Muzamil Ahmad, Mubeen A. Ansari, Abdullah S. Ahmad, Fakhrul Islam

Research output: Contribution to journalArticle

127 Citations (Scopus)

Abstract

Coenzyme Q10 (CoQ10), a peculiar lipophilic antioxidant, is an essential component of the mitochondrial electron-transport chain. It is involved in the manufacturing of adenosine triphosphate (ATP) and has been linked with improving cognitive functions. The present study shows the neuroprotective effect of CoQ10 on cognitive impairments and oxidative damage in hippocampus and cerebral cortex of intracerebroventricular-streptozotocin (ICV-STZ) infused rats. Male Wistar rats (1-year old) were infused bilaterally with an ICV injection of STZ (1.5 mg/kg b.wt., in normal saline), while sham group received vehicle only. After 24 h, the rats were supplemented with CoQ10 (10 mg/kg b.wt. i.p.) for 3 weeks. The learning and memory tests were monitored 2 weeks after the lesioning. STZ-infused rats showed the loss of cognitive performance in Morris water maze and passive avoidance tests. Three weeks after the lesioning, the rats were sacrificed for estimating the contents of thiobarbituric acid reactive substances (TBARS), reduced glutathione (GSH), protein carbonyl (PC), ATP and the activities of glutathione peroxidase (GPx), glutathione reductase (GR), cholineacetyltransferase (ChAT) and acetylcholinesterase (AChE). Significant alteration in the markers of oxidative damage (TBARS, GSH, PC, GPx and GR) and a decline in the level of ATP were observed in the hippocampus and cerebral cortex of ICV-STZ rat. A significant decrease in ChAT activity and a concomitant increase in AChE activity were observed in the hippocampus. However, supplementation with CoQ10 in STZ-infused rats reversed all the parameters significantly. Thus, the study demonstrates that CoQ10 may have a therapeutic importance in the treatment of Alzheimer's type dementia.

Original languageEnglish (US)
Pages (from-to)9-16
Number of pages8
JournalBehavioural Brain Research
Volume171
Issue number1
DOIs
StatePublished - Jul 15 2006

Fingerprint

coenzyme Q10
Streptozocin
Injections
Hippocampus
Thiobarbituric Acid Reactive Substances
Glutathione Reductase
Adenosine Triphosphate
Acetylcholinesterase
Glutathione Peroxidase
Cerebral Cortex
Neuroprotective Agents
Electron Transport
Cognition
Glutathione
Cognitive Dysfunction
Wistar Rats
Alzheimer Disease
Proteins
Antioxidants

Keywords

  • Adenosine triphosphate
  • Alzheimer's disease
  • Cholineacetyltransferase
  • Coenzyme Q10
  • Cognitive impairment
  • Lipid peroxidation
  • Oxidative stress
  • Streptozotocin

ASJC Scopus subject areas

  • Behavioral Neuroscience

Cite this

Coenzyme Q10 modulates cognitive impairment against intracerebroventricular injection of streptozotocin in rats. / Ishrat, Tauheed; Khan, Mohammad Badruzzaman; Hoda, MD Nasrul; Yousuf, Seema; Ahmad, Muzamil; Ansari, Mubeen A.; Ahmad, Abdullah S.; Islam, Fakhrul.

In: Behavioural Brain Research, Vol. 171, No. 1, 15.07.2006, p. 9-16.

Research output: Contribution to journalArticle

Ishrat, Tauheed ; Khan, Mohammad Badruzzaman ; Hoda, MD Nasrul ; Yousuf, Seema ; Ahmad, Muzamil ; Ansari, Mubeen A. ; Ahmad, Abdullah S. ; Islam, Fakhrul. / Coenzyme Q10 modulates cognitive impairment against intracerebroventricular injection of streptozotocin in rats. In: Behavioural Brain Research. 2006 ; Vol. 171, No. 1. pp. 9-16.
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