Delayed plasticity of the mesolimbic dopamine system following neonatal 6‐OHDA lesions

Delayed plasticity of the mesolimbic dopamine system following neonatal 6‐OHDA lesions
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新生儿 6-OHDA 损伤后中脑边缘多巴胺系统的可塑性延迟

DOI:
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发表时间:
1997
期刊:
影响因子:
2.3
通讯作者:
J. Joyce
J. Joyce
中科院分区:
医学4区
文献类型:
--
作者:
P. Frohna;B. Neal;J. Joyce

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在本研究中,我们确定了出生当天接受纹状体内 6-羟基多巴胺 (6-OHDA) 或载体损伤的大鼠腹侧中脑酪氨酸羟化酶 (TH) mRNA 的个体发育谱(出生后第 7、14、35 和 90 天),以及纹状体中 TH 免疫反应性 (TH-IR) 和多巴胺 (DA) 转运蛋白 (DAT) 位点的水平(DO) 或产后第 1 天 (P1)。与对照组相比,尾壳核所有象限的 TH-IR 在所有时间点均显着下降,而伏隔核中的 TH-IR 没有变化。相对于最早时间点(P7 损伤组),P14、P35 和 P90 6-OHDA 损伤组的内侧尾壳核 (CPu) 的 TH-IR 显着恢复。 [3H]-马吲哚与 DAT 位点结合的定量放射自显影显示,在所有时间点,6-OHDA 损伤组的整个尾壳核都有明显的损伤引起的损失,并且没有显示出明显的恢复。使用原位杂交,发现 6-OHDA 损伤动物的外侧和内侧黑质致密部的 TH mRNA 水平在所有时间点均显着降低 (P < .05)。头端腹侧被盖区 (VTA) 的 TH mRNA 水平在 P7、P14 和 P35 时显着降低,在 P90 时恢复到对照水平。尾侧 VTA 中的 TH mRNA 水平在 P35 期间没有变化,到 P90 时与对照相比显着升高(+22%,P < .05)。因此,内侧尾壳核中 TH-IR 的恢复发生在 VTA 的 TH mRNA 水平升高之前。我们的研究结果表明,在某些中纹状体 DA 神经元亚群的早期发育中存在与成人不同的补偿。突触 25:293–305, 1997。© 1997 Wiley‐Liss, Inc.
In this study, we determined the ontogenetic profile (at postnatal days 7, 14, 35, and 90) of tyrodine hydroxylase (TH) mRNA in the ventral mesencephalon, and the levels of TH immunoreactivity (TH‐IR) and dopamine (DA) transporter (DAT) sites in the striatum of rats that had received intrastriatal 6‐hydroxy dopamine (6‐OHDA) or vehicle lesions on day of birth (DO) or postnatal day 1 (P1). TH‐IR was significantly decreased in all quadrants of the caudate‐putamen at all time points, while TH‐IR in the nucleus accumbens was unchanged, as compared to controls. Relative to the earliest time point (P7 lesion group), TH‐IR recovered significantly in the medial caudate‐putamen (CPu) of the P14, P35 and P90 6‐OHDA‐lesioned groups. Quantitative autoradiography of [3H]‐mazindol binding to DAT sites showed significant, lesion‐induced losses throughout the caudate‐putamen of the 6‐OHDA‐lesioned groups at all time points and did not show appreciable recovery. Using in situ hybridization, significant (P < .05) decreases in TH mRNA levels were found at all time points in the lateral and medial substantia nigra pars compacta of 6‐OHDA‐lesioned animals. TH mRNA levels in the rostral ventral tegmental area (VTA), which were significantly decreased at P7, P14 and P35, returned to control levels at P90. TH mRNA levels in the caudal VTA were unchanged through P35 and became significantly elevated as compared to controls (+22%, P < .05) by P90. Thus, recovery of TH‐IR in the medial caudate‐putamen occurred prior to the elevation in levels of TH mRNA of the VTA. Our findings suggest that compensation exists in early development in certain subpopulations of mesostriatal DA neurons that differs from that in the adult. Synapse 25:293–305, 1997. © 1997 Wiley‐Liss, Inc.
神经毒素损伤后多巴胺能脑神经元酪氨酸羟化酶基因表达的缓慢变化:神经元衰老模型。
DOI: 10.1016/0169-328x(92)90045-d
发表时间: 1992
期刊: Brain research. Molecular brain research
影响因子: --
作者:
Pasinetti,GM;Osterburg,HH;Kelly,AB;Kohama,S;Morgan,DG;ReinhardJr,JF;Stellwagen,RH;Finch,CE
通讯作者: Finch,CE
慢性病变会不同程度地降低黑质多巴胺能神经元中的酪氨酸羟化酶信使 RNA。
DOI: 10.1016/0169-328x(89)90036-3
发表时间: 1989
期刊: Brain research. Molecular brain research
影响因子: --
作者:
Pasinetti,GM;Lerner,SP;Johnson,SA;Morgan,DG;Telford,NA;Finch,CE
通讯作者: Finch,CE
DOI: --
发表时间: 1987
期刊: The Journal of pharmacology and experimental therapeutics
影响因子: --
作者:
G. Breese;G. Duncan;T. Napier;S. Bondy;L. Iorio;R. Mueller
通讯作者: G. Breese;G. Duncan;T. Napier;S. Bondy;L. Iorio;R. Mueller
新生儿和成年 6-羟基多巴胺治疗大鼠对多巴胺激动剂的行为差异:与脑多巴胺减少的临床综合征中神经系统症状的相关性。
DOI: --
发表时间: 1984
期刊: The Journal of pharmacology and experimental therapeutics
影响因子: --
作者:
Breese,GR;Baumeister,AA;McCown,TJ;Emerick,SG;Frye,GD;Crotty,K;Mueller,RA
通讯作者: Mueller,RA
DOI: 10.1016/0165-3806(91)90038-k
发表时间: 1991
期刊: Brain research. Developmental brain research
影响因子: --
作者:
Neal,BS;Joyce,JN
通讯作者: Joyce,JN