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Suppression of NF-kappabeta signaling pathway by tocotrienol can prevent diabetes associated cognitive deficits

Anurag Kuhad1, Mahendra Bishnoi, Vinod Tiwari

  • 1Pharmacology Research Laboratory, University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Study, Panjab University, Chandigarh-160 014, India.

Pharmacology, Biochemistry, and Behavior
|January 14, 2009
PubMed
Abstract

Insights

Tocotrienol supplementation improved cognitive function in diabetic rats by reducing neuroinflammation and oxidative stress. This suggests tocotrienol

Area of Science:

  • Neuroscience
  • Endocrinology
  • Pharmacology

Background:

  • Diabetes mellitus is linked to cognitive decline, involving insulin resistance, neuronal damage, and altered neurotransmission.
  • Neuroinflammation and oxidative stress are key contributors to diabetes-associated cognitive impairment.

Purpose of the Study:

  • To investigate the effects of tocotrienol on cognitive function in a rat model of diabetes.
  • To assess tocotrienol's impact on neuroinflammatory markers and oxidative stress in diabetic encephalopathy.

Main Methods:

  • Streptozotocin-induced diabetic rats were treated with tocotrienol for 10 weeks.
  • Cognitive function was evaluated using the Morris water maze test.
  • Brain tissue analysis included acetylcholinesterase activity, oxidative stress markers, inflammatory cytokines (TNF-α, IL-1β), NF-κβ, and caspase-3.

Main Results:

  • Diabetic rats exhibited impaired memory, increased acetylcholinesterase activity, oxidative stress, and elevated levels of TNF-α, IL-1β, caspase-3, and NF-κβ.
  • Tocotrienol treatment dose-dependently ameliorated these behavioral, biochemical, and molecular deficits.
  • Combination therapy with insulin and tocotrienol showed enhanced effects on molecular parameters.

Conclusions:

  • Activation of the NF-κβ signaling pathway is implicated in diabetes-induced cognitive impairment.
  • Tocotrienol demonstrates therapeutic potential for treating diabetic encephalopathy.

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