Inhibition and recovery of cholinesterases in Odontophrynus americanus tadpoles exposed to fenitrothion.
J Environ Biol
; 30(5 Suppl): 923-6, 2009 Sep.
Article
en En
| MEDLINE
| ID: mdl-20143730
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.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Anuros
/
Acetilcolinesterasa
/
Butirilcolinesterasa
/
Inhibidores de la Colinesterasa
/
Fenitrotión
/
Insecticidas
Límite:
Animals
Idioma:
En
Revista:
J Environ Biol
Año:
2009
Tipo del documento:
Article
País de afiliación:
Argentina