Acetylcholinesterase and Neuropathy Target Esterase Inhibitions in Neuroblastoma Cells to Distinguish Organophosphorus Compounds Causing Acute and Delayed Neurotoxicity
نویسندگان
چکیده
منابع مشابه
Side effects of organophosphorus compounds: delayed neurotoxicity.
Many organophosphorus compounds produce a chronic toxicity that has been classified as a dying-back process in which the long axons are particularly affected. Recent evidence indicates that an essential first step in the production of the lesion is the phosphorylation of a protein that is able to hydrolyse substrates such as phenyl phenylacetate. The esterase activity of the protein is inhibite...
متن کامل[Structure-reactivity relationships and delayed neurotoxicity of organophosphorus compounds].
A correlation has been found between the reactivity in the alkaline hydrolysis reaction of a new series of organophosphates and their ability or disability to produce the clinical manifestations of delayed neurotoxicity in hen. At a dose of 1000 mg/kg only compounds exceeding a lower limit of reactivity (about 6x10-2 M-1S-1) are active.
متن کاملStudies on the delayed neurotoxicity of organophosphorus compounds- (I).
Delayed neurotoxicity experiments of an organophosphorus compound, TOCP, on hens and quails were carried out. The animals were orally exposed with TOCP in dose of 400 mg/kg, and maintained for 25 and 50 days under observation, respectively. They were sacrificed and dissected at different periods after the exposure, and the histopathological examinations were made on those animals. During the pe...
متن کاملAge-related differences in the inhibition of neuropathy target esterase and susceptibility to triphenyl phosphite-induced delayed neurotoxicity in chickens.
Triphenyl phosphite (TPP)-induced delayed neurotoxicity, which is thought to resemble but somewhat differ from classical organophosphate-induced delayed neurotoxicity (OPIDN), is known to be age-dependent. The relationship between clinical appearance and histopathological lesions, and the inhibition of neurotoxicity target esterase (NTE) in nervous tissues were compared in young and adult chick...
متن کاملOrganophosphorus and other inhibitors of brain 'neurotoxic esterase' and the development of delayed neurotoxicity in hens.
1. The delayed neurotoxic effects of some organophosphorus compounds are associated with phosphorylation of the active site of a nervous-tissue enzyme capable of hydrolysing phenyl phenylacetate. 2. Neurotoxic organophosphorus compounds and some carbamates and sulphonyl fluorides progressively inhibit the enzyme, attaching a substituent covalently at the active site. 3. Prolonged inhibition of ...
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ژورنال
عنوان ژورنال: Toxicological Sciences
سال: 1997
ISSN: 1096-6080,1096-0929
DOI: 10.1093/toxsci/38.1.55