Lithium facilitates apoptotic signaling induced by activation of the Fas death domain-containing receptor

Ling Song, Tong Zhou, Richard S. Jope

Research output: Contribution to journalArticle

51 Scopus citations

Abstract

Background: Lithium, a mood stabilizer widely used to treat bipolar disorder, also is a neuroprotectant, providing neurons protection from apoptosis induced by a broad spectrum of toxic conditions. A portion of this neuroprotection is due to lithium's inhibition of glycogen synthase kinase-3. The present investigation examined if the neuroprotection provided by lithium included apoptosis induced by stimulation of the death domain-containing receptor Fas. Results: Instead of providing protection, treatment with 20 mM lithium significantly increased apoptotic signaling induced by activation of Fas, and this occurred in both Jurkat cells and differentiated immortalized hippocampal neurons. Other inhibitors of glycogen synthase kinase-3, including 20 μM indirubin-3′-monoxime, 5 μM kenpaullone, and 5 μM rottlerin, also facilitated Fasinduced apoptotic signaling, indicating that the facilitation of apoptosis by lithium was due to inhibition of glycogen synthase kinase-3. Conclusions: These results demonstrate that lithium is not always a neuroprotectant, and it has the opposite effect of facilitating apoptosis mediated by stimulation of death domain-containing receptors.

Original languageEnglish (US)
Article number20
JournalBMC Neuroscience
Volume5
DOIs
StatePublished - May 24 2004
Externally publishedYes

ASJC Scopus subject areas

  • Neuroscience(all)
  • Cellular and Molecular Neuroscience

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