期刊
PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY
卷 87, 期 2, 页码 182-188出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.pestbp.2006.07.008
关键词
monocrotophos; insecticides; Gambusia affinis; acetylcholinesterase; locomotor behaviour; catalase; glutathione reductase; superoxide dismutase; lipid peroxidation; oxidative stress
Recovery study was performed at regular intervals to establish the time course of 50%, and 100% recovery in neurotransmitter enzyme (acetylcholinesterase, AChE, EC 3.1.1.7) and locomotor behaviour response of mosquito fish, Gambusia affinis exposed to lethal concentration (20.49 mg L-1) of an organophosphorous pesticide, monocrotophos (MCP) for 96 h. In vitro AChE activity studies indicated that MCP could cause 50% inhibition (I-50) at 10.2 x 10(-5) M. A positive correlation was observed between brain AChE activity and swimming speed during the recovery study. Also, the recovery response of the antioxidant enzymes superoxide dismutase (SOD, EC 1.15.1.1), catalase (CAT, EC 1.11.1.6) and glutathione reductase (GR, EC 1.6.4.2) as well as lipid peroxidation (LPO) as biomarkers of oxidative stress were assessed in viscera of G. affinis. The results showed that the MCP besides its inhibitory effect on target enzyme AChE activity and induction in antioxidant enzyme activities as a characteristic of oxidative stress, which can be used as biomarkers in the pesticide contaminated aquatic streams. (c) 2006 Elsevier Inc. All rights reserved.
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