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ID 14515
Eprint ID
14515
FullText URL
Thumnail 103_281.pdf 664 KB
Title Alternative
Pharmacological specificity of antipsychotic, antiischemic and some other drugs for σ receptors labeled with [(3)H] haloperidol
Author
Zushi, Yoshifumi
Abstract
Pharmacological specificity of several classes of drugs such as antipsychotics and antiischemic agents was assessed for σ receptors labeled with [(3)H] haloperidol. Specific binding of [(3)H] haloperidol in the presence of 25 nM spiperone was saturable and high affinity )Kd=1.96±1.31 nM, Bmax=2.37±0.27pmol/mg of protein;n=8). Among the 29 antipsychotics tested in inhibition studies, bromperidol and haloperidol were the most potent inhibitors (Ki=0.9nM, 1.0nM, respectively). The conventional antipsychotics moperone, timiperone etc. and the novel promising drugs YM-09151, Y-516, BMY-14802 and remoxipride potently inhibited [(3)H] haloperidol binding with the Ki in the range of low to moderate nanomolar. On the other hand, among the other 27 drugs tested, the antispasmodics eperisone and tolperisone, the antiischemic agents ifenprodil, the Ca(2+) antagonist flunarizine and cinnarizine, and the antitussives carbetapentane, cloperastine and dextromethorphan, were especially potent inhibitors. These results, taken together with the evidence that the antiischemic agents ifenprodil and dextromethorphan antagozine NMDA responses and NMDA receptor complex is a possible site of action for neuroprotective agents, strongly suggest that σ receptors may be potential sites of action for antiischemic as well as antipsychotic drugs, i.e., σ receptors mediate the neuroprotective effects of certain antiischemic agents by affecting the NMDA receptor complex.
Keywords
sigma receptors
antipsychotics
ifenprodil
dextromethorophan
eperisone
Note
原著
Published Date
1991
Publication Title
岡山医学会雑誌
Publication Title Alternative
Journal of Okayama Medical Association
Volume
volume103
Issue
issue4
Publisher
岡山医学会
Publisher Alternative
Okayama Medical Association
Start Page
281
End Page
292
ISSN
0030-1558
NCID
AN00032489
Content Type
Journal Article
Official Url
https://www.jstage.jst.go.jp/article/joma1947/103/4/103_4_281/_article/-char/ja/
Related Url
http://www.okayama-u.ac.jp/user/oma/
language
日本語
Copyright Holders
岡山医学会
File Version
publisher
Refereed
True
Eprints Journal Name
joma