Neosurugatoxin blocks nicotinic acetylcholine receptors in the brain.

Abstract:

:Neosurugatoxin, a neurotoxin isolated from the Japanese ivory mollusc (Babylonia japonica ) is a nicotinic antagonist with a specificity towards ganglionic nicotinic receptors. At low concentration (5 x 10(?8) M) neosurugatoxin inhibited the release of [(3)H]dopamine evoked by 1,1-dimethyl-4-phenylpiperazinium (DMPP) from rat striatal nerve terminals, without affecting the response to K(+)-depolarisation. In contrast, ?bungarotoxin did not antagonise the action of DMPP. Neosurugatoxin also inhibited [(3)H] nicotine binding to rat brain membranes but had no effect on [(125)I]?bungarotoxin binding to the same tissue preparation. These results support the view that functional nicotinic receptors in the CNS resemble ganglionic nicotinic receptors. Neosurugatoxin has considerable potential as a useful probe for such receptors in the brain.

journal_name

Neurochem Int

authors

Rapier C,Harrison R,Lunt GG,Wonnacott S

doi

10.1016/0197-0186(85)90131-7

subject

Has Abstract

pub_date

1985-01-01 00:00:00

pages

389-96

issue

2

eissn

0197-0186

issn

1872-9754

pii

0197-0186(85)90131-7

journal_volume

7

pub_type

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