Imipramine, desipramine, citalopram and chlorpromazine in concentrations which corresponded with their concentration in the central nervous system of rats after pharmacological doses, potentiated phospholipid methylation in the synaptic cortical membranes of naive rats in-vitro. Chronic administration of imipramine, desipramine or citalopram induced changes in the activity of phospholipid methyltransferases since none of these drugs stimulated phospholipid methylation in the synaptic cortical membranes of rats treated with these antidepressants for two weeks. In contrast, chronic treatment with chlorpromazine did not change the sensitivity of phospholipid methyltransferases to the stimulating effect of chlorpromazine, whereas addition of haloperidol to the synaptic cortical membranes of rats treated chronically with haloperidol led to a decrease of phospholipid methylation.

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http://dx.doi.org/10.1111/j.2042-7158.1991.tb06641.xDOI Listing

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