title: Recovery of plasmatic cholinesterase activity in a neotropical fish Prochilodus lineatus (Pisces, Curimatidae) exposed to organophosphorous pesticides.
abstract: The objective was to determine the plasmatic enzyme cholinesterase recovery, after being inhibited by an organophosphorous in juveniles of Prochilodus lineatus. Fish were exposed 12 h to a sublethal concentration of 1 mg/l of monocrotophos, and immediately placing in clean water during 12, 24, 48 and 96 h to detoxification. After this period, blood was extracted and plasma were used for the quantification of cholinesterase. The results showed a enzymatic inhibition of 91.9%, 55.1%, 50.4% and 33.4% with 12, 24, 48 and 96 h of recovery, respectively. The enzymatic activity spreads to be normalized with the course of hours and the degree of inhibition obtained initially was very high and sustained in the first 48 h.
authors.affiliation: National Institute of Limnology, National Council of Technical and Scientific Research, Jose Macia 1933, (3016) Santo Tome City, Santa Fe Province, Argentine Republic. inali@arnet.com.ar
authors.forename: Alicia
authors.initials: A
authors.lastname: Loteste
authors.forename: Jimena
authors.initials: J
authors.lastname: Cazenave
authors.forename: M Julieta
authors.initials: MJ
authors.lastname: Parma de Croux
mesh_terms: D000222:Adaptation, Physiological; D000818:Animals; D002802:Cholinesterases / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D004781:Environmental Exposure; D005399:Fishes / Q000502:physiology*; D007306:Insecticides / Q000009:adverse effects*; D009943:Organophosphorus Compounds
chemical_list: D007306:Insecticides; D009943:Organophosphorus Compounds; D002802:Cholinesterases