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Departamento de Bioquimica y Biología Molecular, Universidad de Alcalá de Henares, Madrid, Spain.
The influence of lindane upon phosphatidylinositol hydrolysis in rat brain cortex slices has been investigated using anion-exchange chromatography in order to separate the water-soluble inositol metabolites. Acetylcholine, noradrenaline, and lindane induce the accumulation of myo-[2-3H]inositol as the water-soluble inositol metabolites. However, the cholinergic muscarinic antagonist atropine inhibited the stimulatory response of carbachol, but practically unmodified the effect that lindane has on inositol phosphate production. Also, prazosin anti-alpha 1 adrenoreceptors blocked noradrenaline-induced phosphoinositide hydrolysis, but had no effect on lindane-induced increase of inositol phosphate levels. The results suggest that lindane does not exert a general effect on the receptor-stimulated formation of inositol phosphates by both muscarinic and alpha 1-adrenergic agonists.
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