Neuropathy target esterase inhibition by organophosphorus esters in human neuroblastoma cells.
Neurotoxicology
; 15(2): 309-13, 1994.
Article
en En
| MEDLINE
| ID: mdl-7991219
Certain organophosphorus compounds (OPs) produce a delayed neuropathy (OPIDN) in man and some animal species. Capability to cause OPIDN is generally predicted in animal models by early and irreversible inhibition of neuropathy target esterase (NTE, neurotoxic esterase). In this study, NTE inhibition in response to OP exposure was examined in cell culture, using the human SH-SY5Y neuroblastoma cell line. Cells were exposed for 1 hr to equimolar (1 x 10(-5) M) concentrations of 6 OPs associated with OPIDN in vivo (including 2 protoxicants and 4 active (-P = O) toxicants), and 8 OPs that do not produce delayed neuropathy in animal models (including 5 protoxicants and 3 -P = O compounds). The -P = O compounds that cause OPIDN in animal models inhibited NTE > 60% at the test concentration; -P = O compounds that do not cause OPIDN in animal models inhibited NTE < 30%. Protoxicants did not inhibit NTE at the test concentration, reflecting their limited metabolism in the human cell line. These results indicate that human neuroblastoma cells have potential use in the initial screening of bioactive OPs with capability for causing OPIDN.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Compuestos Organofosforados
/
Hidrolasas de Éster Carboxílico
/
Enfermedades del Sistema Nervioso Periférico
/
Neuroblastoma
Tipo de estudio:
Prognostic_studies
Límite:
Humans
Idioma:
En
Revista:
Neurotoxicology
Año:
1994
Tipo del documento:
Article
Pais de publicación:
Países Bajos