M S Nijjar

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Kainic acid is known to stimulate the release of glutamate (GLU) and aspartate (ASP) from presynaptic neurons. It has been suggested that the enhanced release of these endogenous EAA's plays a significant role in the excitotoxic effects of KA. Domoic acid (DOM), a shellfish toxin, is structurally similar to KA, and has been shown to be 3-8 times more toxic(More)
In a previous communication we reported that glucose deprivation from KHRB medium resulted in a marked stimulation of Ca2+ uptake by brain tissue, suggesting a relationship between glucose and Ca2+ homeostasis in brain tissue. Experiments were carried out to investigate the significance of glucose in Ca2+ transport in brain cells. The replacement of glucose(More)
Domoic acid is a shellfish toxin which produces neurodegeneration and CNS dysfunction, notably a loss of short-term memory. This toxin was found in blue mussels (Mytilus edulis) cultivated in river water in the east coast of Prince Edward Island in Canada and caused human poisoning. The toxin was localized in the stomach of blue mussels, which was engorged(More)
Adenylate cyclase activity measured by the formation of cyclic AMP in rat brain membranes was inhibited by a shellfish toxin, domoic acid (DOM). The inhibition of enzyme was dependent on DOM concentration, but about 50% of enzyme activity was resistant to DOM-induced inhibition. Rat brain supernatant resulting from 105,000 x g centrifugation for 60 min,(More)
The toxic effects of excitatory amino acids (EAAs) on the central nervous system appear to be mediated by calcium. Calcium uptake into rat brain tissue slices was studied in the absence and in the presence of domoate and glutamate. Calcium uptake into brain cytoplasm was enhanced by domoate in a concentration-dependent manner. Glutamate also stimulated(More)
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