RESUMO
Acetamiprid (ACP) is a neonicotinoid insecticide that is the most effective pesticide for crop protection as well as flea control in agricultural animals and pets in the world. The goal of this study was to look at the in vivo effects of a sublethal dose of ACP on hematotoxicity, oxidative stress, hepatotoxicity, nephrotoxicity, immunotoxicity, and histological alterations, as well as the role of quercetin (QE) in alleviating these effects. Twenty adult male mice were divided into four equal groups orally administered corn oil (control), QE (50 mg kg-1 b.wt.), ACP (1/10 LD50) or ACP plus QE for two weeks. The results showed that ACP significantly lowered the body weight gain, hematological indices, glutathione (GSH), and both cellular and humoral immunity, On the other hand, levels of lipid peroxidation (LPO), glutathione peroxidase (GPx), and liver and kidney marker values were considerably increased in male mice exposed to ACP. In addition, examination under light microscopic showed that ACP induces histological alterations in liver and kidney tissues. The results also revealed that treating intoxicated mice with QE significantly reduced the deleterious effects of ACP. In conclusion, current results show that ACP at the sub lethal dose poses toxic risks to the liver and kidneys, and QE as a natural material enhances antioxidant defenses, which can be used as a potential interventional therapy against negative effects of pesticides like ACP.
Assuntos
Antioxidantes , Quercetina , Animais , Antioxidantes/metabolismo , Glutationa/metabolismo , Peroxidação de Lipídeos , Fígado , Camundongos , Neonicotinoides/toxicidade , Estresse Oxidativo , Quercetina/toxicidadeRESUMO
An indirect competitive enzyme-linked immunosorbent assay (ELISA) has been developed and optimized for atrazine determination in soil at different depths (0-10, 10-20, and 20-30 cm) before and after 48 h of application, corn shoot and cow milk samples collected from Dina farm, Egypt. This assay was based on a specific polyclonal antibodies (PAb) raised by immunizing New Zealand rabbits with an immunogen prepared by coupling 3-{4-(ethylamino)-6-(isopropylamino)-1,3,5-triazine-2-yl} thiopropanoic acid to bovine serum albumin (BSA) via N-hydroxysuccinimide (NHS) active ester method. The sensitivity (estimated as IC50 value) was 17.5 µg mL⻹ with a detection limit of 0.1 ng mL⻹. The maximum atrazine concentration was found in soil especially in the deepest layer (325 and 890 µg kg⻹ before and after application, respectively). Atrazine concentration in corn shoot was 333.28, µg kg⻹ dry plant, while there was no detectable amount in milk. All samples screened by ELISA were validated by gas chromatography mass spectrometer procedure (GC/MS). Good correlation was achieved between the two methods (r = 0.997 for soil and 0.9814 for plant). This study demonstrates the utility and convenience of the simple, practical and cost-effective ELISA method in the laboratory for analysis of environmental samples. The method is ideal for the rapid screening of large numbers of samples in laboratories where access to GC/MS facilities, is limited or lacking.
Assuntos
Atrazina/análise , Monitoramento Ambiental/métodos , Ensaio de Imunoadsorção Enzimática/métodos , Herbicidas/análise , Leite/química , Solo/química , Zea mays/química , Animais , Anticorpos/imunologia , Bovinos , Egito , Ensaio de Imunoadsorção Enzimática/economia , Cromatografia Gasosa-Espectrometria de Massas , Haptenos/imunologia , Concentração Inibidora 50 , Coelhos , Sensibilidade e Especificidade , Soroalbumina Bovina/imunologia , Poluentes do Solo/análiseRESUMO
Pesticides may induce oxidative stress leading to generate free radicals and alternate antioxidant or oxygen free radical scavenging enzyme system. This study was conducted to investigate the acute toxicity of imidacloprid toward male mice and the oxidative stress of the sublethal dose (1/10 LD(50)) on the lipid peroxidation level (LPO), reduced glutathione content (GSH) and activities of the antioxidant enzymes; catalase (CAT), superoxide dismutase (SOD), glutathione peroxidase (GPx), glucose-6-phosphate dehydrogenase (G6PD), and glutathione-s-transferase (GST). Also, the protective effect of vitamin C (200mg/kg bw) 30 min before or after administration of imidacloprid were investigated. The results demonstrated that the median lethal dose (LD(50)) of imidacloprid after 24h was 149.76 mg/kg bw. The oral administration of 14.976 mg/kg imidacloprid significantly caused elevation in LPO level and the activities of antioxidant enzymes including CAT, SOD, GPx and GST. However, G6PD activity remained unchanged, while the level of GSH content was decreased. In addition, the results showed that vitamin C might ameliorate imidacloprid-induced oxidative damage by decreasing LPO and altering antioxidant defense system in liver. The protective effect of the pre-treatment with vitamin C against imidacloprid-induced oxidative stress in liver mice is better than the post-treatment.