title: [Anticholinesterase activity of alkyl esters of perfluoroalkyl phosphonic and perfluoroalkyl phosphinic acids].
abstract: It has been demonstrated that esters (RO)2P(O)X and RO(R1)P(O)X where R and R1-alkyls, X-CF3 or C2F5, irreversibly inhibited cholinesterases. Their inhibitory effect increased with the elongation of alkyl radicals from CH3- to C4H9-, being more evident with respect to butyrylcholinesterase from horse serum than to acetylcholinesterase from human erythrocytes. It is shown that the concept on inability of esters of thiophosphoric acids to inhibit cholinesterases due to the fact that thionic sulphur (P-S) does not form a strong hydrogen bonds, cannot be applied to esters of perfluorothiophosphonic acids: (C2H5O)2P(S)CF3 inhibits cholinesterases more efficiently than (C2H5O)2P(O)CF3. One of the fluoric atoms probably forms hydrogen bond with the corresponding site of the active centre in cholinesterases, similar to phosphorylic oxygen (P-O) in case of the enzyme inhibition by esters of phosphoric acids.
authors.forename: A P
authors.initials: AP
authors.lastname: Brestkin
authors.forename: A V
authors.initials: AV
authors.lastname: Golovanov
authors.forename: A I
authors.initials: AI
authors.lastname: Lavrent'ev
authors.forename: I G
authors.initials: IG
authors.lastname: Maslennikov
authors.forename: N A
authors.initials: NA
authors.lastname: Ianson
mesh_terms: D000110:Acetylcholinesterase / Q000097:blood; D000818:Animals; D002091:Butyrylcholinesterase / Q000097:blood; D002384:Catalysis; D055598:Chemical Phenomena; D002621:Chemistry; D002800:Cholinesterase Inhibitors; D004952:Esters; D005466:Fluorocarbons / Q000494:pharmacology*; D006736:Horses; D006801:Humans; D066298:In Vitro Techniques; D009943:Organophosphorus Compounds / Q000494:pharmacology*; D013329:Structure-Activity Relationship
chemical_list: D002800:Cholinesterase Inhibitors; D004952:Esters; D005466:Fluorocarbons; D009943:Organophosphorus Compounds; D000110:Acetylcholinesterase; D002091:Butyrylcholinesterase
vernacular_title: Antikholinésteraznaia aktivnost' alkil'nykh éfirov perftoralkilfosfonovoĭ i perftoralkilfosfinovoĭ kislot.