Abstract
1. 1. The function of the gamma-aminobutyric acid (GABA)-ergic system in certain areas of the rat brain was investigated after chronic chemical stress (exposure to ether vapours 30 sec/day for 20 days). 2. 2. GABA concentration, [ 3H]-GABA uptake and the activity of the synthesis enzyme glutamate decarboxylase (GAD) were measured. 3. 3. Chronic stress: (a) reduced neuronal uptake of [ 3H]-GABA in the frontal cerebral cortex (43%) and increased non-neuronal uptake of [ 3H]-GABA in the hypothalamus (62%); (b) enhanced the activity of GAD (under subsaturating substrate concentration) in the frontal cortex (91%) and in the corpus striatum (69%); (c) did not modify GABA endogenous concentration; (d) did not affect the animals' body weight increase or produce any signs of toxicity. 4. 4. The stimulation of GAD and reduction of [ 3H]-GABA neuronal uptake in the frontal cortex might suggest the stimulation of GABAergic neurotransmission induced by chronic stress in this area of the rat brain. Together with previous findings the frontal cortex would appear to be a key area in chronic stress processing.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
