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PubMed1990

Sensitive murine model and putative antidotes for behaviorial toxicosis from contaminated mussel extracts.

The recent outbreak of "amnesic" mussel poisoning syndrome, attributed to domoic acid contamination of edible mussels claimed several lives and left many victims impaired with a peculiar loss of memory. We administered the whole mussel extract (WMX) and the mussel hepatopancreas extract (MHX, hepatopancreas being the major site for sequestration of domoic acid in mussels) in Swiss-Webster mice. A characteristic syndrome featuring sluggishness, scratching stereotypy, convulsions and death was noticed. Infant mice were some 3- to 4-fold more sensitive to the WMX toxicity. Kynurenic acid (KYN), an endogenous nonselective excitotoxin antagonist offered significant protection against the toxicosis after its onset had been provoked by the mussel extract. This observation emphasizes the feasibility of using KYN or related compounds in the therapy of poisoning from excitotoxins. As a logical extension of this possibility we examined the possibility that endogenous KYN could be exploited for similar protection against domoate toxicosis in our murine model. The time frame during which KYN was protective was increased by probenecid, a blocker of organic acid transport and by tryptophan, a precursor of endogenous KYN. We examined also the classical anticonvulsants phenytoin and ethosuximide, as well as dextromethorphan at its excitotoxin antagonistic dose. The infant mouse model of domoate-toxicity holds promise for being developed into a rapid, sensitive, reliable and inexpensive biological assay for screening commercial batches of mussel for excitotoxin contamination. Kynurenic acid and dextromethorphan should be further examined as antidotes for possible therapeutic use in existing victims and in the treatment of future domoate toxicosis occurring here or elsewhere.

Age Factors↗
PubMed1990

[Differential diagnosis od septicemia and localized suppurative- inflammatory diseases in newborn infants].

The clinical data and findings of more than 40 laboratory tests were studied and compared in 150 full-term neonates with localized ++pyo-inflammatory diseases and in 150 children with sepsis. Clinical and laboratory criteria for diagnosis during pronounced infectious toxicosis and toxicosis abatement as well as the patient's egress to reparation were distinguished.

Bacterial Infections↗