Differential Up-Regulation of Ammonia Detoxifying Enzymes in Cerebral Cortex, Cerebellum, Hippocampus, Striatum and Liver in Hyperammonemia

Author(s): Elena A. Kosenko, Lyudmila A. Tikhonova, V. Prakash Reddy, Gjumrakch Aliev, Yury G. Kaminsky

Journal Name: CNS & Neurological Disorders - Drug Targets
Formerly Current Drug Targets - CNS & Neurological Disorders

Volume 13 , Issue 6 , 2014

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In order to gain insight into the ammonia-detoxification mechanisms in the brain and liver tissues, we have investigated the effects of hyperammonemia in rats, in vivo, on the activity levels of a number of ammonia- and glutamate-metabolizing enzymes in mitochondria and the cytosolic fractions of the cerebral cortex, cerebellum, hippocampus, striatum and liver. In general, the ammonia metabolizing enzymes – glutaminase, glutamine synthetase, glutamate dehydrogenase, AMP deaminase, adenosine deaminase, as well as aspartate aminotransferase and alanine aminotransferase – are differentially upregulated in various brain and liver regions of the hyperammonemic rats, indicating that divergent ammonia-detoxification mechanisms are involved in the various brain regions and liver in acute hyperammonemia.

Keywords: Ammonia detoxification, cerebellum, cerebral cortex, glutamate metabolism, hippocampus, hyperammonemia, striatum.

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Article Details

Year: 2014
Page: [1089 - 1095]
Pages: 7
DOI: 10.2174/1871527313666140806155929
Price: $65

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