Biomaterial Database

A glycine antagonist 7-chlorokynurenic acid attenuates ischemia-induced learning deficits. 1993

E R Wood, and T J Bussey, and A G Phillips

Department of Psychology, University of British Columbia, Vancouver, Canada.

Transient global ischemia can result in permanent neuronal damage and impairments in learning and memory. We investigated the therapeutic potential of 7-Chlorokynurenic acid, a potent antagonist at the glycine-modulatory site on the NMDA receptor, in terms of both neuroprotection and behavioral outcome in rats following transient forebrain ischemia. Intraventricular administration of the drug immediately before ischemia significantly attenuated ischemia-induced CA1 pyramidal cell loss. Moreover, ischemic rats treated with 7-Chlorokynurenic acid showed unimpaired acquisition of a delayed nonmatching to sample task 8 weeks following surgery, whereas saline-treated ischemic rats were significantly impaired. These data provide preliminary evidence that the glycine site may be an appropriate target for therapeutic agents in ischemia.

UI	MeSH Term	Description	Entries
D007276	Injections, Intraventricular	Injections into the cerebral ventricles.	Intraventricular Injections,Injection, Intraventricular,Intraventricular Injection
D007736	Kynurenic Acid	A broad-spectrum excitatory amino acid antagonist used as a research tool.	Kynurenate,Acid, Kynurenic
D007858	Learning	Relatively permanent change in behavior that is the result of past experience or practice. The concept includes the acquisition of knowledge.	Phenomenography
D007859	Learning Disabilities	Conditions characterized by a significant discrepancy between an individual's perceived level of intellect and their ability to acquire new language and other cognitive skills. These may result from organic or psychological conditions. Relatively common subtypes include DYSLEXIA, DYSCALCULIA, and DYSGRAPHIA.	Adolescent Learning Disabilities,Adult Learning Disabilities,Child Learning Disabilities,Developmental Academic Disability,Developmental Academic Disorder,Developmental Disabilities of Scholastic Skills,Learning Disabilities, Adolescent,Learning Disabilities, Child,Learning Disorders,Academic Disorder, Developmental,Adult Learning Disorders,Developmental Disorders of Scholastic Skills,Learning Disorders, Adult,Learning Disturbance,Scholastic Skills Development Disorders,Academic Disabilities, Developmental,Academic Disability, Developmental,Academic Disorders, Developmental,Adolescent Learning Disability,Adult Learning Disability,Adult Learning Disorder,Child Learning Disability,Developmental Academic Disabilities,Developmental Academic Disorders,Disabilities, Adolescent Learning,Disabilities, Adult Learning,Disabilities, Child Learning,Disabilities, Developmental Academic,Disabilities, Learning,Disability, Adolescent Learning,Disability, Adult Learning,Disability, Child Learning,Disability, Developmental Academic,Disability, Learning,Disorder, Learning,Disorders, Adult Learning,Disorders, Learning,Disturbance, Learning,Disturbances, Learning,Learning Disabilities, Adult,Learning Disability,Learning Disability, Adolescent,Learning Disability, Adult,Learning Disability, Child,Learning Disorder,Learning Disorder, Adult,Learning Disturbances
D008297	Male		Males
D011712	Pyramidal Tracts	Fibers that arise from cells within the cerebral cortex, pass through the medullary pyramid, and descend in the spinal cord. Many authorities say the pyramidal tracts include both the corticospinal and corticobulbar tracts.	Corticobulbar Tracts,Corticospinal Tracts,Decussation, Pyramidal,Corticobulbar Tract,Corticospinal Tract,Pyramidal Decussation,Pyramidal Tract,Tract, Corticobulbar,Tract, Corticospinal,Tract, Pyramidal,Tracts, Corticobulbar,Tracts, Corticospinal,Tracts, Pyramidal
D002546	Ischemic Attack, Transient	Brief reversible episodes of focal, nonconvulsive ischemic dysfunction of the brain having a duration of less than 24 hours, and usually less than one hour, caused by transient thrombotic or embolic blood vessel occlusion or stenosis. Events may be classified by arterial distribution, temporal pattern, or etiology (e.g., embolic vs. thrombotic). (From Adams et al., Principles of Neurology, 6th ed, pp814-6)	Brain Stem Ischemia, Transient,Cerebral Ischemia, Transient,Crescendo Transient Ischemic Attacks,Transient Ischemic Attack,Anterior Circulation Transient Ischemic Attack,Brain Stem Transient Ischemic Attack,Brain TIA,Brainstem Ischemia, Transient,Brainstem Transient Ischemic Attack,Carotid Circulation Transient Ischemic Attack,Posterior Circulation Transient Ischemic Attack,TIA (Transient Ischemic Attack),Transient Ischemic Attack, Anterior Circulation,Transient Ischemic Attack, Brain Stem,Transient Ischemic Attack, Brainstem,Transient Ischemic Attack, Carotid Circulation,Transient Ischemic Attack, Posterior Circulation,Transient Ischemic Attack, Vertebrobasilar Circulation,Transient Ischemic Attacks, Crescendo,Vertebrobasilar Circulation Transient Ischemic Attack,Attack, Transient Ischemic,Attacks, Transient Ischemic,Brainstem Ischemias, Transient,Cerebral Ischemias, Transient,Ischemia, Transient Brainstem,Ischemia, Transient Cerebral,Ischemias, Transient Brainstem,Ischemias, Transient Cerebral,Ischemic Attacks, Transient,TIA, Brain,TIAs (Transient Ischemic Attack),Transient Brainstem Ischemia,Transient Cerebral Ischemia,Transient Cerebral Ischemias,Transient Ischemic Attacks
D002552	Cerebral Ventricles	Four CSF-filled (see CEREBROSPINAL FLUID) cavities within the cerebral hemispheres (LATERAL VENTRICLES), in the midline (THIRD VENTRICLE) and within the PONS and MEDULLA OBLONGATA (FOURTH VENTRICLE).	Foramen of Monro,Cerebral Ventricular System,Cerebral Ventricle,Cerebral Ventricular Systems,Monro Foramen,System, Cerebral Ventricular,Systems, Cerebral Ventricular,Ventricle, Cerebral,Ventricles, Cerebral,Ventricular System, Cerebral,Ventricular Systems, Cerebral
D004192	Discrimination, Psychological	Differential response to different stimuli.	Discrimination, Psychology,Psychological Discrimination
D005998	Glycine	A non-essential amino acid. It is found primarily in gelatin and silk fibroin and used therapeutically as a nutrient. It is also a fast inhibitory neurotransmitter.	Aminoacetic Acid,Glycine, Monopotassium Salt,Glycine Carbonate (1:1), Monosodium Salt,Glycine Carbonate (2:1), Monolithium Salt,Glycine Carbonate (2:1), Monopotassium Salt,Glycine Carbonate (2:1), Monosodium Salt,Glycine Hydrochloride,Glycine Hydrochloride (2:1),Glycine Phosphate,Glycine Phosphate (1:1),Glycine Sulfate (3:1),Glycine, Calcium Salt,Glycine, Calcium Salt (2:1),Glycine, Cobalt Salt,Glycine, Copper Salt,Glycine, Monoammonium Salt,Glycine, Monosodium Salt,Glycine, Sodium Hydrogen Carbonate,Acid, Aminoacetic,Calcium Salt Glycine,Cobalt Salt Glycine,Copper Salt Glycine,Hydrochloride, Glycine,Monoammonium Salt Glycine,Monopotassium Salt Glycine,Monosodium Salt Glycine,Phosphate, Glycine,Salt Glycine, Monoammonium,Salt Glycine, Monopotassium,Salt Glycine, Monosodium