Data/hora: 23/09/2024 03:21:57

Biblioteca(s): 	Embrapa Meio Ambiente.	
Data corrente: 	13/12/2017	
Data da última atualização: 	23/01/2018	
Autoria: 	DANTZGER, D. D.; DANTZGER, M.; JONSSON, C. M.; AOYAMA, H.	
Afiliação: 	DARLENE DENISE DANTZGER, IB-UNICAMP; MIRIAM DANTZGER, IB-UNICAMP; CLAUDIO MARTIN JONSSON, CNPMA; HIROSHI AOYAMA, IB-UNICAMP.	
Título: 	In vitro effects of agriculture pollutants on microcrustacean and fish acid phosphatases.	
Ano de publicação: 	2017	
Fonte/Imprenta: 	Water, Air, and Soil Pollution, v. 228, n. 10, p. 3-10, 2017. Article 391.	
DOI: 	https://doi.org/10.1007/s11270-017-3570-7	
Idioma: 	Inglês	
Conteúdo: 	Chemical inputs from agricultural activities represent a threat to aquatic biota and its biochemical systems. Among these systems, acid phosphatases are involved in autophagic digestive processes, decomposing organic phosphates, signaling pathways, and other metabolic routes. In vitro tests are helpful to generate hypotheses about pollutant mechanisms of action through comparison of the toxicity effects of these compounds. In this work, we investigated the inhibitory effects of four organic pesticides and three metals on the acid phosphatases extracted from the freshwater microcrustacean Daphnia similis and the fish Metynnis argenteus. Our results demonstrated that only the metals have considerable inhibitory effects (50% or higher) on the enzyme activities. The calculated median effect concentrations (IC50) for the enzyme inhibition were 0.139 mM Hg2+ (fish enzyme), 0.652 mM Cu2+ (fish enzyme), and 1.974 mM Al3+ (Daphnia enzyme). Due to the relatively low value of the inhibition parameter for Hg2+, its inhibitory property could be used as a tool for Hg2+ detection in environmental samples. The enzyme activities obtained in the presence of the inhibitors are potential data as in vivo biomarkers for metals in both aquatic species.	
Palavras-Chave: 	Biomarcador; Dáfnia.	
Thesagro: 	Agrotóxico; Metal pesado; Peixe de água doce; Poluição da água; Toxidez.	
Thesaurus Nal: 	Biomarkers; Heavy metals; Metynnis; Pesticides; Toxicity; Water pollution.	
Categoria do assunto: 	H Saúde e Patologia	
Registro original: 	Embrapa Meio Ambiente (CNPMA)	
Exemplares: 	CNPMA - (15913-1) - UPC - AP - DD -  -  -  - DIS