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Ontogenetic development of glutamate and GABA metabolizing enzymes in cultured cerebral cortex interneurons and in cerebral cortex in vivo
Author(s) -
Larsson O. M.,
Drejer J.,
Kvamme E.,
Svenneby G.,
Hertz L.,
Schousboe A.
Publication year - 1985
Publication title -
international journal of developmental neuroscience
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.761
H-Index - 88
eISSN - 1873-474X
pISSN - 0736-5748
DOI - 10.1016/0736-5748(85)90008-5
Subject(s) - cerebral cortex , in vivo , glutamate receptor , gabaergic , biology , cortex (anatomy) , glutamine , glutamate decarboxylase , neuroscience , glutamine synthetase , glutamate dehydrogenase , gamma aminobutyric acid , gaba transaminase , enzyme , biochemistry , amino acid , inhibitory postsynaptic potential , genetics , receptor
The development of the enzymes phosphate activated glutaminase (PAG), glutamate dehydrogenase (GLDH), glutamic‐oxaloacetic‐transaminase (GOT), glutamine synthetase (GS), GABA‐transaminase (GABA‐T) and ornithine‐δ‐aminotransferase (Orn‐T) was followed in mouse cerebral cortex in vivo and in cultured mouse cerebral cortex interneurons. It was found that GLDH, GOT and Orn‐T exhibited an enhanced developmental pattern in the cultured neurons compared to cerebral cortex. The activities of PAG and GABA‐T developed in parallel in vivo and in culture but the activity of GS remained low in the cultured neurons compared to the increasing activity of this enzyme found in vivo . Compared to cerebral cortex the cultured neurons exhibited higher activities of PAG, GLDH and Orn‐T, whereas the activities of GABA‐T and GOT were lower in the cultured cells. The activity of GS in the cultured neurons was only 5–10% of the activity in cerebral cortex in vivo . It is concluded that neurons from cerebral cortex represent a reliable model system by which the metabolism and function of GABAergic neurons can be conveniently studied in a physiologically meaningful way.