The nootropic drug vinpocetine inhibits veratridine-induced [Ca2+]i increase in rat hippocampal CA1 pyramidal cells

T. Zelles, Laura Franklin, István Koncz, Balázs Lendvai, G. Zsilla

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The alkaloid derivative vinpocetine (14-ethoxycarbonyl-(3α, 16α-ethyl)- 14,15-eburnamine; Cavinton) has a well known beneficial effect on brain function in hypoxic and ischemic conditions. While it increases CNS blood flow and improves cellular metabolism, relatively little is known about vinpocetine's underlying molecular mechanisms on the single cell level. Since apoptotic and necrotic cell damage is always preceded by an increase in [Ca2+]i, this study investigated the effect of vinpocetine on [Ca2+]i increases in acute brain slices. Sodium influx is an early event in the biochemical cascade that takes place during ischemia. The alkaloid veratridine can activate this Na+ influx, causing depolarization and increasing [Ca2+]i in the cells. Therefore, it can be used to simulate an ischemic attack in brain cells. Using a cooled CCD camera-based ratio imaging system and cell loading with fura 2/AM, the effect of vinpocetine on [Ca2+]i changes in single pyramidal neurons in the vulnerable CA1 region of rat hippocampal slices was investigated. Preperfusion and continuous administration Of vinpocetine (10 μM) significantly inhibited the elevation in [Ca2+]i induced by veratridine (10 μM). When the drug was administered after veratridine, it could accelerate the recovery of cellular calcium levels. Piracetam, another nootropic used in clinical practice, could attenuate the elevation of [Ca2+]i only at a high, 1 mM, concentration. We have concluded that vinpocetine, at a pharmacologically relevant concentration, can decrease pathologically high [Ca2+]i levels in individual rat hippocampal CA1 pyramidal neurons; this effect might contribute to the neuroprotective property of the drug.

Original languageEnglish
Pages (from-to)1095-1100
Number of pages6
JournalNeurochemical Research
Volume26
Issue number8-9
DOIs
Publication statusPublished - 2001

Fingerprint

vinpocetine
Nootropic Agents
Veratridine
Pyramidal Cells
Rats
Brain
Alkaloids
Neurons
Piracetam
Hippocampal CA1 Region
Fura-2
Depolarization
Neuroprotective Agents
CCD cameras
Metabolism
Imaging systems
Blood
Ischemia

Keywords

  • [Ca]
  • Na-channels
  • Neuroprotection
  • Rat hippocampal slices
  • Veratridine
  • Vinpocetine

ASJC Scopus subject areas

  • Neuroscience(all)
  • Biochemistry

Cite this

The nootropic drug vinpocetine inhibits veratridine-induced [Ca2+]i increase in rat hippocampal CA1 pyramidal cells. / Zelles, T.; Franklin, Laura; Koncz, István; Lendvai, Balázs; Zsilla, G.

In: Neurochemical Research, Vol. 26, No. 8-9, 2001, p. 1095-1100.

Research output: Contribution to journalArticle

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