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Evaluation and physiological correlation of plasma proteomic fingerprints for deltamethrin-induced hepatotoxicity in Wistar rats.

Life Sciences 2016 September 2
AIMS: Uprising reports towards deltamethrin (DLM)-induced toxicity in non-target species including mammals have raised a worldwide concern. Moreover, in the absence of any identified marker, the prediction of DLM elicited early toxic manifestations in non-targets remains elusive.

MAIN METHODS: Comprehensive approach of proteome profiling along with conventional toxico-physiological correlation analysis was performed to classify novel protein based markers in the plasma of DLM exposed Wistar rats. Animals were exposed orally to DLM (low dose: 2.56mg/kg b.wt. and high dose: 5.12mg/kg b.wt.) up to seven consecutive days.

KEY FINDINGS: The UPLC-MS/MS analysis revealed a dose-dependent dissemination of DLM and its primary metabolite (3-Phenoxy benzoic acid) in rat plasma. Through 2-DE-MS/MS plasma profiling and subsequent verification at the transcriptional level, we found that 6 liver emanated acute phase proteins (Apolipoprotein-AIV, Apolipoprotein E, Haptoglobin, Hemopexin, Vitamin D Binding protein, and Fibrinogen gamma chain) were significantly (p<0.05) modulated in DLM treated groups in a dose-dependent manner. Accordingly, DLM exposure resulted in adverse effects on body growth (body weight & relative organ weight), serum profile, liver function and histology, inflammatory changes (enhanced TNF-ɑ, TGF-β and IL6 level), and oxidative stress. Moreover, these toxic manifestations were suppressed upon N-acetyl cysteine (NAC) supplementation in DLM treated animals. Thus, DLM-induced inflammatory response and subsequent oxidative injury to liver grounds the altered expression of identified acute phase proteins.

SIGNIFICANCE: In conclusion, we proposed these six liver emanated plasma proteins as novel candidate markers to assess the early DLM-induced hepatotoxicity in non-target species with a minimal invasive mean.

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