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EnglishMembrane-bound acetylcholinesterase (AChE) from the human erythrocyte is inhibited by chlorpromazine (CPZ) in a concentration range within which this amphiphilic drug has been demonstrated to interact with erythrocyte membranes, causing a large spectrum of physical and structural effects; membrane solubilization with 0.5% Triton X-100 results in a complete loss of CPZ inhibitory potency. Although these observations might suggest a role for membrane lipid environment in mediating human erythrocyte AChE inhibition, we observed that CPZ retains its full inhibitory effect on the fraction of enzyme (5-6% of total) that is solubilized from erythrocytes upon treatment with phosphatidylinositol-specific phospholipase C (PI-PLC) from Bacillus thuringiensis; furthermore, Triton X-100 is able to reverse the CPZ effect also in the case of PI-PLC-solubilized enzyme. These results demonstrate unequivocally that CPZ inhibits human erythrocyte AChE through direct molecular interaction. The inhibition kinetics displayed by CPZ on human erythrocyte AChE are dependent on drug concentration: evidence is provided that this phenomenon may be related to formation of CPZ micellar aggregates.
A STUDY OF HUMAN ERYTHROCYTE ACETYLCHOLINESTERASE INHIBITION BY CHLORPROMAZINE / A., Spinedi; L., Pacini; Limatola, Cristina; P., Farias Rn Luly. - In: BIOCHEMICAL JOURNAL. - ISSN 0264-6021. - STAMPA. - 278:2(1991), pp. 461-463.
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| Titolo: | A STUDY OF HUMAN ERYTHROCYTE ACETYLCHOLINESTERASE INHIBITION BY CHLORPROMAZINE | |
| Autori: | ||
| Data di pubblicazione: | 1991 | |
| Rivista: | ||
| Citazione: | A STUDY OF HUMAN ERYTHROCYTE ACETYLCHOLINESTERASE INHIBITION BY CHLORPROMAZINE / A., Spinedi; L., Pacini; Limatola, Cristina; P., Farias Rn Luly. - In: BIOCHEMICAL JOURNAL. - ISSN 0264-6021. - STAMPA. - 278:2(1991), pp. 461-463. | |
| Handle: | http://hdl.handle.net/11573/42588 | |
| Appartiene alla tipologia: | 01a Articolo in rivista |
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