Puerarin protects hippocampal neurons against cell death in pilocarpine-induced seizures through antioxidant and anti-apoptotic mechanisms

Cell Mol Neurobiol. 2014 Nov;34(8):1175-82. doi: 10.1007/s10571-014-0093-2. Epub 2014 Aug 24.

Abstract

Puerarin extracted from Radix puerariae has been shown to exert neuroprotective effects. However, it is still not known whether puerarin protects hippocampal neurons against cell death in pilocarpine-induced seizures. In this study, we found that pretreatment with puerarin significantly attenuated the neuronal death in the hippocampus of rats with pilocarpine-induced epilepsy. In addition, puerarin decreased the level of seizure-induced reactive oxygen species in mitochondria isolated from the rat hippocampi. Terminal deoxyuridine triphosphate nick-end labeling staining showed that puerarin exerted an anti-apoptotic effect on the neurons in the epileptic hippocampus. Western blot analysis showed that puerarin treatment significantly decreased the expression of Bax and increased the expression of Bcl-2. Moreover, puerarin treatment restored the altered mitochondrial membrane potential and cytochrome c release from the mitochondria in the epileptic hippocampi. Altogether, the findings of this study suggest that puerarin exerts a therapeutic effect on epilepsy-induced brain injury through antioxidant and anti-apoptotic mechanisms.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antioxidants / pharmacology*
  • Antioxidants / therapeutic use
  • Apoptosis / drug effects*
  • Caspase 3 / metabolism
  • Cytochromes c / metabolism
  • Enzyme Activation / drug effects
  • Hippocampus / pathology*
  • In Situ Nick-End Labeling
  • Isoflavones / pharmacology*
  • Male
  • Membrane Potential, Mitochondrial / drug effects
  • Mitochondria / drug effects
  • Mitochondria / metabolism
  • Neurons / drug effects
  • Neurons / enzymology
  • Neurons / pathology*
  • Neuroprotective Agents / pharmacology*
  • Pilocarpine
  • Rats, Wistar
  • Reactive Oxygen Species / metabolism
  • Seizures / drug therapy
  • Seizures / enzymology
  • Seizures / pathology*
  • Staining and Labeling

Substances

  • Antioxidants
  • Isoflavones
  • Neuroprotective Agents
  • Reactive Oxygen Species
  • Pilocarpine
  • Cytochromes c
  • Caspase 3
  • puerarin