Inhibition and recovery of cholinesterases in Odontophrynus americanus tadpoles exposed to fenitrothion.

Abstract:

:We determined the levels of brain acetylcholinesterase (AChE) and tail butyrylcholinesterase (BChE) activities in tadpoles of Odontophrynus americanus exposed to a commercial formulation of fenitrothion. The mean brain AChE activities in the controls tadpoles varied from 6.91 to 6.39 micromol min(-1) mg(-1) protein, whereas tail BChE activities ranged among 0.26 to 0.17 micromol min(-1) mg(-1) protein; the two sublethal concentrations of fenitrothion assayed produced AChE and BChE inhibition (p < 0.01). Brain AChE recovered a substantial level of activity with a maximum of 93.2%; after the transference of tadpoles to a free-pesticide solution, whereas tail BChE recovery showed a smaller increase (39%) in the activity at 168 hr after to transference to clear water. According with our results, we suggest that tadpole's tail BChE presents higher sensibility than brain AChE.

journal_name

J Environ Biol

authors

Lajmanovich RC,Attademo AM,Peltzer PM,Junges CM

subject

Has Abstract

pub_date

2009-09-01 00:00:00

pages

923-6

issue

5 Suppl

eissn

0254-8704

issn

2394-0379

journal_volume

30

pub_type

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