Repeated cocaine administration results in supersensitivity of striatal D-2 dopamine autoreceptors to pergolide.

Repeated cocaine administration results in supersensitivity of striatal D-2 dopamine autoreceptors to pergolide.
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重复给予可卡因会导致纹状体 D-2 多巴胺自身受体对培高利特过度敏感。

DOI:
10.1016/0024-3205(88)90634-0
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发表时间:
1988
期刊:
影响因子:
6.1
通讯作者:
Zahniser,NR
Zahniser,NR
中科院分区:
医学2区
文献类型:
--
作者:
Dwoskin,LP;Peris,J;Yasuda,RP;Philpott,K;Zahniser,NR

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给药可卡因-HCl(10 mg/kg,i. p.)或生理盐水,急性或每天一次,持续8或14天,在最后一次给药后24小时处死。在纹状体切片预标记[3 H]DA,调制[3 H]-溢出培高利特被用来测量D-2自身受体活性。与同期对照组相比,培高利特仅在可卡因重复处理的大鼠纹状体切片中产生更大的抑制作用。在使用对照大鼠纹状体膜进行的放射性配体结合研究中,培高利特对D-2的亲和力是对D-1多巴胺(DA)受体亚型的500倍。这些结果表明,可卡因重复治疗产生超敏感的纹状体D-2释放调节自身受体与补偿性变化一致,以减少可卡因产生的DA突触浓度升高的影响。相反,在[3 H]螺哌隆结合试验中未检测到D-2受体的超敏性。
Groups of rats administered cocaine-HCl (10 mg/kg, i.p.) or saline either acutely or once daily for 8 or 14 days were killed 24 hrs after the last dose. In striatal slices prelabelled with [3H]DA, modulation of [3H]-overflow by pergolide was used to measure D-2 autoreceptor activity. Compared to the contemporaneous control group pergolide produced a greater inhibition only in striatal slices from rats treated repeatedly with cocaine. In radioligand binding studies using striatal membranes from control rats, pergolide had a 500-fold greater affinity for the D-2, as opposed to the D-1, dopamine (DA) receptor subtype. These results indicate that repeated treatment with cocaine produces supersensitive striatal D-2 release-modulating autoreceptors consistent with a compensatory change to diminish the effect of elevated synaptic concentrations of DA produced by cocaine. In contrast, supersensitivity of D-2 receptors was not detected in [3H] spiperone binding assays.
DOI: --
发表时间: 1983-08
期刊: The Journal of pharmacology and experimental therapeutics
影响因子: --
作者:
L. Iorio;A. Barnett;F. Leitz;V. Houser;C. Korduba
通讯作者: L. Iorio;A. Barnett;F. Leitz;V. Houser;C. Korduba
D-2 多巴胺受体对大鼠纹状体切片 [3H] 多巴胺释放的稳健调节。
DOI: --
发表时间: 1986
期刊: The Journal of pharmacology and experimental therapeutics
影响因子: --
作者:
Dwoskin,LP;Zahniser,NR
通讯作者: Zahniser,NR
纹状体中[3H]-S-舒必利和[3H]-螺哌酮标记的多巴胺受体位点的比较。
DOI: --
发表时间: 1983
期刊: The Journal of pharmacology and experimental therapeutics
影响因子: --
作者:
Zahniser,NR;Dubocovich,ML
通讯作者: Dubocovich,ML
[3H]酮色林在大鼠脑中血清素 S2 受体上的体内结合。
DOI: 10.1016/0014-2999(82)90599-4
发表时间: 1982
影响因子: 5
作者:
P. Laduron;P. Janssen;J. Leysen
通讯作者: J. Leysen
DOI: --
发表时间: 1983-03
影响因子: 21.1
作者:
M. Bannon;R. Roth
通讯作者: M. Bannon;R. Roth