Consecutive emamectin benzoate and deltamethrin treatments affect the expressions and activities of detoxification enzymes in the rainbow trout (Oncorhynchus mykiss)

详细信息    查看全文

• 作者：Juan Guillermo Cá ; rcamo^a ; ^b ; ^{gcarcamo@uach.cl} ; Marcelo N Aguilar^a ; Constanza F Carreñ ; o^a ; Tamara Vera^a ; ^b ; Luis Arias-Darraz^a ; Jaime E Figueroa^a ; ^b ; Alex P Romero^b ; ^c ; Marco Alvarez^b ; ^d ; Alejandro J Yañ ; ez^a ; ^b
• 关键词：BSA ; bovine serum albumin ; CYP ; cytochrome P450 ; DM ; deltamethrin ; DTNB ; 5 ; 5&prime ; -Dithiobis(2-nitro-benzoic acid) ; EDTA ; ethylenediaminetetraacetic acid ; EGTA ; ethylene glycol tetraacetic acid ; EMB ; emamectin benzoate ; FMO ; flavin-containing monooxygenase ; GSH ; glutathione ; GST ; glutathione S-transferase ; PBS ; phosphate-buffered saline ; PMSF ; phenylmethanesulfonyl fluoride ; SDS ; sodium dodecyl sulfate
• 刊名：Comparative Biochemistry and Physiology Part C: Toxicology & Pharmacology
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：191
• 期：Complete
• 页码：129-137
• 全文大小：794 K
• 卷排序：191

文摘

Rainbow trout (Oncorhynchus mykiss) subjected to three consecutive, alternating treatments with emamectin benzoate (EMB) and deltamethrin (DM) during outbreaks of Caligus rogercresseyi in a farm located in southern Chile (Hornopiren, Chiloé), were studied to determine the effects of these treatments on the protein and enzymatic activity levels of cytochrome P450 1A (CYP1A), flavin-containing monooxygenase (FMO) and glutathione S-transferase (GST) in different tissues. Consecutive and alternating EMB/DM treatments resulted in a 10-fold increase and 3-fold decrease of CYP1A protein levels in the intestine and gills, respectively. Notably, CYP1A activity levels decreased in most of the analyzed tissues. FMO protein and activity levels markedly increased in the kidney and the intestine. GST was up-regulated in all tissues, either as protein or enzyme activity. When comparing consecutive EMB/DM treatments against previous studies of EMB treatment alone, CYP1A activity levels were similarly diminished, except in muscle. Likewise, FMO activity levels were increased in most of the analyzed tissues, particularly in the muscle, kidney, and intestine. The increases observed for GST were essentially unchanged between consecutive EMB/DM and EMB only treatments. These results indicate that consecutive EMB/DM treatments in rainbow trout induce the expression and activity of FMO and GST enzymes and decrease CYP1A activity. These altered activities of detoxification enzymes could generate imbalances in metabolic processes, synthesis, degradation of hormones and complications associated with drug interactions. It is especially important when analyzing possible effects of consecutive antiparasitic treatments on withholding periods and salmon farming yields.