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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Inhibition of glutamate decarboxylase activity by 3-mercaptopropionic acid has different time course in the immature and adult rat brains.

It has been found that the latency of epileptic seizures caused by glutamate decarboxylase (GAD) inhibitor 3-mercaptopropionate (3-MPA) is markedly longer in immature rats than in the adults. Time course of rat brain GAD inhibition was studied in 12-day-old and adult (90-day-old) animals following 3-MPA (70 mg/kg i.p.). GAD activity was determined by quantification of 14CO2 liberated from [1-(14)C]glutamate by supernatant 20,000 x g of brain homogenate prepared from rats killed at different intervals after 3-MPA administration. In adult rats, the enzyme activity decreased significantly by 14.1% even 1 min after 3-MPA administration and was decreasing gradually till the onset of seizures. In immature rats, GAD activity decrease after 1 min was by 41.4% and further decrease was smaller. Comparison of the time profiles of GAD changes in both groups confirmed our findings that in spite of delayed seizure onset, GAD inhibition in immature rats is more pronounced, probably due to immaturity of the blood-brain barrier.[1]

References

  1. Inhibition of glutamate decarboxylase activity by 3-mercaptopropionic acid has different time course in the immature and adult rat brains. Netopilová, M., Drsata, J., Haugvicová, R., Kubová, H., Mares, P. Neurosci. Lett. (1997) [Pubmed]
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