system
Medical AI Inquiry: You was designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.  Labels: BACKGROUND, RESULTS. Meshes: Animals, Antibodies, Apoptosis, Caspase 3, Caspases, Cell Line, Dose-Response Relationship, Drug, Drug Synergism, Enzyme Inhibitors, Fas Ligand Protein, Glycogen Synthase Kinase 3, Humans, Jurkat Cells, Lithium, Membrane Glycoproteins, Mice, Neurons, Poly(ADP-ribose) Polymerases, Protein Structure, Tertiary, Signal Transduction, T-Lymphocytes, Tranquilizing Agents, fas Receptor.
user
Does lithium facilitate apoptotic signaling induced by activation of the Fas death domain-containing receptor? Context: 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. 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 microM indirubin-3'-monoxime, 5 microM kenpaullone, and 5 microM rottlerin, also facilitated Fas-induced apoptotic signaling, indicating that the facilitation of apoptosis by lithium was due to inhibition of glycogen synthase kinase-3.
assistant
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. Final Decision: yes