Effect of tetramethylpyrazine on learning, memory and cholinergic system in D-galactose-lesioned mice.
- Author:
Chun ZHANG
1
;
Shi-zhen WANG
;
Ping-ping ZUO
;
Xu CUI
;
Jiong CAI
Author Information
- Publication Type:Journal Article
- MeSH: Acetylcholinesterase; metabolism; Animals; Avoidance Learning; drug effects; Cognition; drug effects; Galactose; Learning; drug effects; Male; Maze Learning; drug effects; Memory; drug effects; Mice; Mice, Inbred C57BL; Pyrazines; pharmacology; Receptor, Muscarinic M1; metabolism; Receptors, Cholinergic; drug effects; physiology
- From: Acta Academiae Medicinae Sinicae 2003;25(5):553-556
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo explore the effect of tetramethylpyrazine on learning, memory, and cholinergic system in D-galactose-lesioned mice.
METHODSC57BL/6J mice were given subcutaneous injection of 2% D-galactose for 40 days (100 mg.kg-1.d-1). Normal saline, tetramethylpyrazine (TMP) and Huperzine A (HupA) were given respectively by intragastric administration in different study groups from the third week on. Learning and memory ability were tested by Morris water maze for 5 days at the sixth week. Acetylcholinesterase (AchE) activity, the binding sites (Bmax) and the affinity (KD) of M-cholinergic receptor were determined.
RESULTSThe learning and memory dysfunction, with lowered AchE activity and M-cholinergic receptor binding sites were found in the model group as compared with the normal control group. The tetramethylpyrazine, especially at the dose of 100 mg.kg-1.d-1, could markedly attenuate cognitive dysfunction, while elevate the lowered AchE activity (P < 0.05) and M-cholinergic receptor binding sites (P < 0.005) in the cerebral cortex of mice treated with D-galactose.
CONCLUSIONSThe tetramethylpyrazine can significantly improve central cholinergic system function, and thus enhance the learning and memory ability in D-galactose-lesioned mice.
