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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 32 (1979), S. 0 
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The effect of sonicated suspensions of phosphatidylserine, phosphatidylethanolamine and phosphatidylcholine injected intravenously on acetylcholine release from the cerebral cortex was investigated in urethane anaesthetized rats. The electroeorticogram was also recorded.Phosphatidylserine caused a dose dependent, calcium dependent increase in acetylcholine output with no electrocorticografic changes. The increase, 75% peak effect after 150 mg/kg, was abolished by septal lesions and pretreatment with pimozide. Phosphatidylserine had no effect on acetylcholine release from brain slices in vitro.Phosphatidylethanolamine was approximately half as active as phosphatidylserine and phosphatidylcholine had no effect on acetylcholine output in vivo.It is concluded that phosphatidylserine exerts an indirect stimulating action on a septio-cortical cholinergic pathway.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-6903
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Lecithin: cholesterol acyltransferase (LCAT) activity has been examined in the rat by using a brain homogenate preparation as the phospholipid substrate and blood plasma as the enzyme source. LCAT activity was detected on using 60 μl of serum onwards. Successive experiments have also shown that LCAT activity is present in the edematous rat brain tissue homogenate when incubated with inactivated rat plasma as substrate. The results are discussed in relation to cholesteryl ester accumulation in brain during demyelinating diseases.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1590-3478
    Keywords: Choline acetyltransferase: CAT, E.C., 2.1.3.6. ; Acetylcholinesterase: AChE, E.C., 2.1.1.7. ; Acetylcholine: ACh
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Sommario L'attività degli enzimi colina-acetil-transferasi e acetil-colina-esterasi è stata studiata nell'encefalo umano durante l'invecchiamento, nella demenza e nelle patologie terminali. La colina-acetil-transferasi è risultata decrescere con l'età nella corteccia frontale e significativamente diminuita in varie regioni dell'encefalo di soggetti affetti da malattia di Alzheimer e di Creutzfeldt Jacob. Corrispondentemente l'attività della colinoacetil-transferasi è risultata significativamente compromessa anche nelle patologie terminali quali il coma e la broncopolmonite terminale. In contrasto a questi risultati nell'encefalo di soggetti deceduti per accidenti cerebrovascolari la attività enzimatica è risultata normale. In oltre l'attività della acetilcolina-esterasi non ha mostrato significative variazioni in alcuno dei gruppi studiati.
    Notes: Abstract Choline acetyltransferase and acetylcholinesterase have been assessed in human aging brains, in demented and agonal states. Choline acetyl transferase decreased during aging in normal brain when measured in the cerebral cortex. Choline acetyltransferase was also reduced in several other brain areas in patients with Alzheimer's disease and in one patient with Creutzfeldt-Jakob disease. Choline acetyltransferase was also reduced in bronchopneumonia and in some terminal conditions. On the contrary, the activity was not reduced in patients who died after cerebrovascular accidents. Acetylcholine esterase, although it followed the general trend of choline acetyltransferase, did not yield significant results.
    Type of Medium: Electronic Resource
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