当前位置： SCI文献检索 > NEUROSCIENCE期刊下所有文献 > Selective irreversible blockade of 5-hydroxytryptamine1A and 5-hydroxytryptamine1C receptor binding sites in the rat brain by 8-MeO-2'-chloro-PAT: a quantitative autoradiographic study.

Selective irreversible blockade of 5-hydroxytryptamine1A and 5-hydroxytryptamine1C receptor binding sites in the rat brain by 8-MeO-2'-chloro-PAT: a quantitative autoradiographic study.

Abstract：

:The possible irreversible blockade of 5-hydroxytryptamine1 receptor subtypes 5-hydroxytryptamine1A, 5-hydroxytryptamine1B/5-hydroxytryptamine1D and 5-hydroxytryptamine1C by the chloramine 8-methoxy-2-(N-2'-chloropropyl,N-propyl)aminotetralin (8-MeO-2'-chloro-PAT) was investigated in rat brain sections by quantitative autoradiography using [3H]8-hydroxy-2-(di-n-propylamino)tetralin [( 3H]8-OH-DPAT), [3H]5-hydroxytryptamine, [125I]BH-8-MeO-N-PAT and [125I]cyanopindolol as radio-ligands. A marked reduction (-50% to -75%) of [3H]8-OH-DPAT and [125I]BH-8-MeO-N-PAT specific binding to 5-hydroxytryptamine1A sites in the hippocampus (CA1 area) and the dorsal raphe nucleus, and of [3H]5-hydroxytryptamine specific binding to 5-hydroxytryptamine1C sites in the choroid plexus was found in sections exposed to 1 microM 8-MeO-2'-chloro-PAT and then washed extensively. In contrast the specific binding of [3H]5-hydroxytryptamine to 5-hydroxytryptamine1B/5-hydroxytryptamine1D sites and of [125I]cyanopindolol to 5-hydroxytryptamine1B sites in the substantia nigra and dorsal subiculum remained unaltered by this treatment. Similarly [125I]cyanopindolol binding to beta-adrenergic receptors was not affected by 8-MeO-2'-chloro-PAT. Prior occupancy of 5-hydroxytryptamine1A sites by 10 microM 5-hydroxytryptamine or 8-OH-DPAT, and of 5-hydroxytryptamine1C sites by 10 microM 5-hydroxytryptamine prevented any subsequent blockade by 8-MeO-2'-chloro-PAT. These data indicate that 8-MeO-2'-chloro-PAT should be a useful alkylating agent for achieving selective irreversible blockade of central 5-hydroxytryptamine1A and 5-hydroxytryptamine1C receptors in vivo in the rat.

journal_name

Neuroscience

journal_title

Neuroscience

authors

Radja F,Daval G,Emerit MB,Gallissot MC,Hamon M,Vergé D

doi

10.1016/0306-4522(89)90436-3

subject

Has Abstract

pub_date

1989-01-01 00:00:00

pages

723-33

issue

3

eissn

0306-4522

issn

1873-7544

pii

0306-4522(89)90436-3

journal_volume

31

pub_type

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