5-Hydroxytryptamine receptor agonists influence calcium-stimulated adenylate cyclase activity in the cerebral cortex and hippocampus of the rat.
5-Hydroxytryptamine receptor agonists influence calcium-stimulated adenylate cyclase activity in the cerebral cortex and hippocampus of the rat.
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5-羟色胺受体激动剂影响大鼠大脑皮层和海马中钙刺激的腺苷酸环化酶活性。
DOI:
10.1016/0014-2999(90)90560-s
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发表时间:
1990
影响因子:
5
通讯作者:
A. Geisler
中科院分区:
文献类型:
--
作者:
A. Mørk;A. Geisler
The effects of 5-hydroxytryptamine (5-HT) receptor agonists on calcium (Ca2+)-stimulated adenylate cyclase activity in the hippocampus and cerebral cortex of the rat were studied. In the presence of Ca2+(1.5 μM), 5-HT dose dependently inhibited adenylate cyclase activity (EC50= 10 ± 2 nM). The inhibitory effect of 5-HT on Ca2+-stimulated adenylate cyclase was antagonized by spiperone (KB= 2 ± 0.8 nM). The rank order of potency of 5-HT agonists to inhibit Ca2+-stimulated adenylate cyclase in the hippocampus was: 5-carboxamidotryptamine (5-CT) > 8-hydroxy-2-(di-n-propylamino)tetralin (8-OH-DPAT) > 5-hydroxytryptamine (5-HT) = 5-methoxytryptamine (5-OCH3-T) > trifluoromethylphenylpiperazine (TFMPP) > m-chlorophenylpiperazine (mCPP). 2-Methyl-5-hydroxytryptamine (2-CH3-5-HT) did not exert an effect on Ca2+-stimulated enzyme activity. In the cerebral cortex 5-HT exerted a biphasic stimulatory effect on adenylate cyclase activity in the absence of Ca2+(EC50= 0.2 ± 0.04 nM and 10 ± 3μM), whereas 8-OH-DPAT, 5-CT and 2-CH3-5-HT exerted a monophasic effect. In the presence of Ca2+(1.5 μM), low cocentrations of 5-HT, 8-OH-DPAT, 5-CT and 2-CH3-5-HT potentiated adenylate cyclase activity, whereas higher concentrations, except 2-CH3-5-HT, inhibited the enzyme activity. We propose that the 5-HT receptor mediating inhibition of Ca2+-stimulated adenylate cyclase in the rat hippocampus corresponds to the 5-HT1Asubtype. 5-HT seems to enhance Ca2+-stimulated adenylate cyclase activity in the cerebral cortex via a non-typical 5-HT receptor, and to reduce enzyme activity via the 5 HT1Areceptor.
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DOI:
--
发表时间:
1988
期刊:
Proceedings of the Western Pharmacology Society
影响因子:
--
作者:
Cornfield,LJ;Nelson,DL;Monroe,PJ;Taylor,EW;Nikam,SS
通讯作者:
Nikam,SS
DOI:
10.1073/pnas.83.11.4086
发表时间:
1986-06-01
影响因子:
11.1
作者:
CONN, PJ;SANDERSBUSH, E;HARTIG, PR
通讯作者:
HARTIG, PR
影响因子:
3.6
作者:
Ahlijanian,MK;Cooper,DM
通讯作者:
Cooper,DM
DOI:
--
发表时间:
1986
期刊:
The Journal of pharmacology and experimental therapeutics
影响因子:
--
作者:
DeVivo,M;Maayani,S
通讯作者:
Maayani,S
影响因子:
3.6
作者:
Shenker,A;Maayani,S;Weinstein,H;Green,JP
通讯作者:
Green,JP