Abstract
We have previously reported that treatments stimulating phospholipid (PL) synthesis or preventing PL degradation were late preventive agents against CCl4-induced liver necrosis. Later studies by others postulated that stimulation of phospholipase A2 (PLA2) plays a role in PL degradative processes responsible for CCl4 damage. Quinacrine (QUIN) is a well known inhibitor of PLA2. In this work we report that QUIN (150 mg/kg i.p.) partially prevents CCl4-induced liver necrosis at 24 h when given 30 min before or 6 or 10 h after CCl4 (2.5 ml/kg p.o.) QUIN administration does not modify at 1 or 3 h after poisoning CCl4 levels reaching the liver, covalent binding of CCl4 reactive metabolites to proteins or lipids, CCl4-induced lipid peroxidation process, CCl4-induced decreases in body temperature, or glutathione levels in liver. QUIN concentrations in liver at times from 1 to 24 h are well over those required to inhibit PLA2 activity. Results are compatible with the hypothesis that CCl4 activation of PLA2 at late stages of poisoning plays a role in CCl4-induced liver necrosis.
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A. González Padrón was partially supported by a research fellowship from the Autonomic Government of the Canary Islands (Spain).
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Padrón, A.G., de Toranzo, E.G.D. & Castro, J.A. Late preventive effects of quinacrine on carbon tetrachloride induced liver necrosis. Arch Toxicol 67, 386–391 (1993). https://doi.org/10.1007/BF01977399
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DOI: https://doi.org/10.1007/BF01977399