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- W2073562034 abstract "Incorporation of [3H]arachidonic acid (AA) into resting platelets was studied in samples from schizophrenic patients before and after haloperidol withdrawal, and from normal subjects. Eicosanoid biosynthesis was subsequently evaluated in prelabeled platelets by sequential events of thrombin activation. The total incorporation of [3H]AA in drug-free patients was significantly lower than in the same individuals during haloperidol treatment as well as in normal volunteers. No significant difference of [3H]AA incorporation was demonstrated between relapsed and nonrelapsed drug-free patients. The majority of 3H-labeled lipids were found in platelet phospholipids, and < 10% of incorporated lipids were found in free AA, diacylglycerol (DAG), triacylglycerol, and hydroxyeicosatetraenoic acid (HETE) of normal resting platelets. After thrombin activation, however, there was an increased 3H-labeling in 12-HETE, 12-hydroxyheptadecatrienoic acid, and thromboxane B2. The thrombin-induced formation of eicosanoids was found to be significantly higher in haloperidol-treated patients than in normal volunteers. This increased formation of eicosanoids appeared to be normalized after haloperidol withdrawal. In addition, both haloperidol-treated and drug-free patients showed increased 3H-labeling in thrombin-induced DAG compared with normal volunteers. Such an increase in the second messenger formation may be due, at least in part, to an increased turnover of membrane phosphoinositides via phospholipase C reaction. The present data support our previous findings demonstrating altered membrane dynamics in schizophrenia." @default.
- W2073562034 created "2016-06-24" @default.
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- W2073562034 date "1996-02-01" @default.
- W2073562034 modified "2023-10-17" @default.
- W2073562034 title "Abnormal incorporation of arachidonic acid into platelets of drug-free patients with schizophrenia" @default.
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- W2073562034 doi "https://doi.org/10.1016/0165-1781(95)02832-3" @default.
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