Haloperidol Reduces the Activity of Complement and Induces the Anti-Inflammatory Transformation of Peritoneal Macrophages in Rats
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It is known that psychotropic substances affect the immune system. Unfortunately, chronic antipsychotic administration causes side toxicological effects, associated with oxidative stress. The mechanisms of these effects are still unclear. We investigated the impact of sub-chronic administration of haloperidol (Hal) on parameters of innate immunity and related systems in healthy rats and compared them with Hal content. Hal administration (0.5 mg/kg, 3 weeks) resulted in two-fold decrease of the activity of the complement system and hemostasis. Hal content correlated with the activity of the complement (r = −0.71), phagocytic activity of peritoneal macrophages (r = 0.78), leukocyte elastase (r = −0.71) and glutathione-S-transferase activity (r = −0.67). Hal fully blocked in vitro PMA-induced iNOS expression in macrophages and changed their morphology to “anti-inflammatory” phenotype. The comparison of in vivo and in vitro data showed that Hal has a direct effect on phagocytic component of innate immunity and an indirect effect on leukocyte elastase and antioxidant enzymes. The results obtained in the present study indicated that Hal significantly affects homeostasis and causes a number of complex biological transformations.
KeywordsHaloperidol Innate immunity Complement system Macrophages Hemostasis Antioxidant system Rats
The authors thank A.A.Shmakova for her kind assistance in translating the article into English.
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