Age-related recurrence of basal forebrain lesion-induced cholinergic deficits. 1987

G F Hohmann, and G L Wenk, and P Lowenstein, and M E Brown, and J T Coyle
Department of Psychiatry, Johns Hopkins University, School of Medicine, Baltimore, MD 21205.

Lesions of basal forebrain cholinergic nuclei projecting in neocortex have recently been employed as an animal model for the cholinergic deficits in Alzheimer's disease. However, unlike Alzheimer's patients, whose deterioration appears to be progressive and irreversible, basalis lesioned rats usually recover both behaviorally and neurochemically within several months after the lesion. We now demonstrate that this recovery may be a function of the age of the rat and that cholinergic deficits re-occur in the aged rat. Choline acetyltransferase (ChAT) activity and [3H]hemicholinium-3 ([3H]HCh-3) binding are reduced in cortex ipsilateral to ibotenic acid lesions in the 12-month postlesion rat following an initial recovery to normal levels by about 3 months postlesion. The recurrence of decrease of cholinergic markers is not a consequence of a non-specific age-related decline since the activity of glutamic acid decarboxylase remains constant between 3 and 12 months postlesion.

UI MeSH Term Description Entries
D007051 Ibotenic Acid A neurotoxic isoxazole (similar to KAINIC ACID and MUSCIMOL) found in AMANITA mushrooms. It causes motor depression, ataxia, and changes in mood, perceptions and feelings, and is a potent excitatory amino acid agonist. Acid, Ibotenic
D008297 Male Males
D011919 Rats, Inbred Strains Genetically identical individuals developed from brother and sister matings which have been carried out for twenty or more generations or by parent x offspring matings carried out with certain restrictions. This also includes animals with a long history of closed colony breeding. August Rats,Inbred Rat Strains,Inbred Strain of Rat,Inbred Strain of Rats,Inbred Strains of Rats,Rat, Inbred Strain,August Rat,Inbred Rat Strain,Inbred Strain Rat,Inbred Strain Rats,Inbred Strains Rat,Inbred Strains Rats,Rat Inbred Strain,Rat Inbred Strains,Rat Strain, Inbred,Rat Strains, Inbred,Rat, August,Rat, Inbred Strains,Rats Inbred Strain,Rats Inbred Strains,Rats, August,Rats, Inbred Strain,Strain Rat, Inbred,Strain Rats, Inbred,Strain, Inbred Rat,Strains, Inbred Rat
D002540 Cerebral Cortex The thin layer of GRAY MATTER on the surface of the CEREBRAL HEMISPHERES that develops from the TELENCEPHALON and folds into gyri and sulci. It reaches its highest development in humans and is responsible for intellectual faculties and higher mental functions. Allocortex,Archipallium,Cortex Cerebri,Cortical Plate,Paleocortex,Periallocortex,Allocortices,Archipalliums,Cerebral Cortices,Cortex Cerebrus,Cortex, Cerebral,Cortical Plates,Paleocortices,Periallocortices,Plate, Cortical
D002795 Choline O-Acetyltransferase An enzyme that catalyzes the formation of acetylcholine from acetyl-CoA and choline. EC 2.3.1.6. Choline Acetylase,Choline Acetyltransferase,Acetylase, Choline,Acetyltransferase, Choline,Choline O Acetyltransferase,O-Acetyltransferase, Choline
D002799 Cholinergic Fibers Nerve fibers liberating acetylcholine at the synapse after an impulse. Cholinergic Fiber,Fiber, Cholinergic,Fibers, Cholinergic
D004195 Disease Models, Animal Naturally-occurring or experimentally-induced animal diseases with pathological processes analogous to human diseases. Animal Disease Model,Animal Disease Models,Disease Model, Animal
D005917 Globus Pallidus The representation of the phylogenetically oldest part of the corpus striatum called the paleostriatum. It forms the smaller, more medial part of the lentiform nucleus. Paleostriatum,Pallidum,Pallidums
D005968 Glutamate Decarboxylase A pyridoxal-phosphate protein that catalyzes the alpha-decarboxylation of L-glutamic acid to form gamma-aminobutyric acid and carbon dioxide. The enzyme is found in bacteria and in invertebrate and vertebrate nervous systems. It is the rate-limiting enzyme in determining GAMMA-AMINOBUTYRIC ACID levels in normal nervous tissues. The brain enzyme also acts on L-cysteate, L-cysteine sulfinate, and L-aspartate. EC 4.1.1.15. Glutamate Carboxy-Lyase,Glutamic Acid Decarboxylase,Acid Decarboxylase, Glutamic,Carboxy-Lyase, Glutamate,Decarboxylase, Glutamate,Decarboxylase, Glutamic Acid,Glutamate Carboxy Lyase
D006426 Hemicholinium 3 A potent inhibitor of the high affinity uptake system for CHOLINE. It has less effect on the low affinity uptake system. Since choline is one of the components of ACETYLCHOLINE, treatment with hemicholinium can deplete acetylcholine from cholinergic terminals. Hemicholinium 3 is commonly used as a research tool in animal and in vitro experiments. Hemicholinium

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