title: GABA agonists and neurotransmitters metabolizing enzymes in steroid-primed OVX rats.
abstract: The effect of intraventricular (IVT) administration of GABAA receptor agonist muscimol and GABAB receptor agonist, baclofen was examined on the activity of acetylcholinesterase (AChE), monoamine oxidase (MAO) and Na+, K(+)-ATPase in discrete areas of brain from estrogen-progesterone primed ovariectomized rats. AChE enzyme activity was increased in two subcellular fractions (soluble and total particulate) studied, with statistically significant changes in cerebral hemispheres (CH), cerebellum (CB), thalamus (TH) and hypothalamus (HT), Na+, K(+)-ATPase enzyme activity was decreased in both these fractions. MAO activity increased significantly in CH, TH and HT. The presented results suggest a functional relationship between GABAergic (inhibitory), cholinergic and monoaminergic (excitatory) systems by affecting the rate of degradation of the excitatory neurotransmitters and Na+, K(+)-ATPase.
authors.affiliation: Department of Biotechnology, Guru Nanak Dev University, Amritsar, India.
authors.forename: G
authors.initials: G
authors.lastname: Kaur
authors.forename: P
authors.initials: P
authors.lastname: Sharma
authors.forename: S
authors.initials: S
authors.lastname: Bhardwaj
authors.forename: G
authors.initials: G
authors.lastname: Kaur
mesh_terms: D000109:Acetylcholine / Q000378:metabolism; D000110:Acetylcholinesterase / Q000187:drug effects / Q000378:metabolism; D000818:Animals; D001418:Baclofen / Q000494:pharmacology; D001921:Brain / Q000033:anatomy & histology / Q000187:drug effects / Q000378:metabolism*; D002531:Cerebellum / Q000187:drug effects / Q000378:metabolism; D004967:Estrogens / Q000494:pharmacology; D005260:Female; D018755:GABA Agonists / Q000494:pharmacology*; D007031:Hypothalamus / Q000187:drug effects / Q000378:metabolism; D008995:Monoamine Oxidase / Q000187:drug effects / Q000378:metabolism; D009118:Muscimol / Q000494:pharmacology; D018377:Neurotransmitter Agents / Q000378:metabolism*; D010052:Ovariectomy; D011374:Progesterone / Q000494:pharmacology; D051381:Rats; D017208:Rats, Wistar; D000254:Sodium-Potassium-Exchanging ATPase / Q000187:drug effects / Q000378:metabolism
chemical_list: D004967:Estrogens; D018755:GABA Agonists; D018377:Neurotransmitter Agents; D009118:Muscimol; D011374:Progesterone; D008995:Monoamine Oxidase; D000110:Acetylcholinesterase; D000254:Sodium-Potassium-Exchanging ATPase; D001418:Baclofen; D000109:Acetylcholine