Metabolic fate of [U-14C]-labeled glutamate in primary cultures of mouse astrocytes as a function of development.
The metabolic fate of [U-14C]-labeled glutamate in astrocytes grown in primary cultures for 1-3 weeks in the absence or presence of dibutyryl cyclic AMP was followed using dansylation with 3H-dansyl chloride and subsequent thin layer chromatography of the dansylated amino acids. No indication was found of classical metabolic compartmentation, i.e., the specific radioactivity of glutamine (14C/3H ratio) never exceeded that of its precursor, glutamate. In accordance with a relatively late maturation of glutamine synthetase activity the rate of formation of labeled glutamine was much faster in 3-week-old than in 1-week-old cultures. The opposite was found for aspartate formation, but under all conditions incorporation of radioactivity into aspartate was pronounced.
D000818:Animals; D001224:Aspartic Acid / Q000378:metabolism; D001253:Astrocytes / Q000166:cytology*; D001345:Autoradiography; D003994:Bucladesine / Q000494:pharmacology; D002454:Cell Differentiation / Q000187:drug effects; D002540:Cerebral Cortex / Q000166:cytology*; D046508:Culture Techniques; D005971:Glutamates / Q000378:metabolism*; D005973:Glutamine / Q000378:metabolism; D009115:Muridae
D005971:Glutamates; D005973:Glutamine; D001224:Aspartic Acid; D003994:Bucladesine