Cocaine but not natural reward self-administration nor passive cocaine infusion produces persistent LTP in the VTA.

Cocaine but not natural reward self-administration nor passive cocaine infusion produces persistent LTP in the VTA.
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可卡因,但不是自然奖励自我给药或被动可卡因输注在VTA中产生持久的LTP。

DOI:
10.1016/j.neuron.2008.05.024
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发表时间:
2008-07-31
期刊:
影响因子:
16.2
通讯作者:
Bonci A
Bonci A
中科院分区:
医学1区
文献类型:
--
作者:
Chen BT;Bowers MS;Martin M;Hopf FW;Guillory AM;Carelli RM;Chou JK;Bonci A

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持续的药物寻求行为被假设为是大脑的自然奖励激励系统。虽然腹侧被盖区(VTA)的多巴胺(DA)神经元代表了这个系统的重要组成部分,突触适应的自然回报和药物相关的动机还没有完全阐明。在这里,我们表明,自我管理的可卡因,而不是被动的可卡因输注,产生了持续增强腹侧被盖区兴奋性突触,这仍然存在3个月的禁欲后。此外,增强的突触功能,腹侧被盖区是明显的,即使在3周的灭绝训练。食物或蔗糖自我管理只诱导VTA神经递质信号的瞬时增强。我们的数据表明,腹侧被盖区DA神经元的突触功能很容易,但可逆地增强自然的奖励寻求行为,而自愿可卡因自我管理诱导持久的突触增强,是抵抗行为灭绝。腹侧被盖区DA神经元中这种持续的突触增强可能代表了驱动病理性药物寻求行为的基本细胞现象。
Persistent drug-seeking behavior is hypothesized to co-opt the brain's natural reward-motivational system. Although ventral tegmental area (VTA) dopamine (DA) neurons represent a crucial component of this system, the synaptic adaptations underlying natural rewards and drug-related motivation have not been fully elucidated. Here we show that self-administration of cocaine, but not passive cocaine infusions, produced a persistent potentiation of VTA excitatory synapses, which was still present after 3 months abstinence. Further, enhanced synaptic function in VTA was evident even after 3 weeks of extinction training. Food or sucrose self-administration induced only a transient potentiation of VTA glutamatergic signaling. Our data show that synaptic function in VTA DA neurons is readily but reversibly enhanced by natural reward-seeking behavior, while voluntary cocaine self-administration induced a persistent synaptic enhancement that is resistant to behavioral extinction. Such persistent synaptic potentiation in VTA DA neurons may represent a fundamental cellular phenomenon driving pathological drug-seeking behavior.
DOI: 10.1152/jn.00704.2006
发表时间: 2006-11-01
影响因子: 2.5
作者:
Canavier, C. C.;Landry, R. S.
通讯作者: Landry, R. S.
DOI: 10.1523/jneurosci.1312-04.2004
发表时间: 2004-08-25
影响因子: 5.3
作者:
Borgland, SL;Malenka, RC;Bonci, A
通讯作者: Bonci, A
DOI: 10.1016/j.neuron.2006.01.016
发表时间: 2006-02-16
期刊: NEURON
影响因子: 16.2
作者:
Borgland, SL;Taha, SA;Bonci, A
通讯作者: Bonci, A
DOI: 10.1113/jphysiol.1992.sp019136
发表时间: 1992-05-01
影响因子: 5.5
作者:
JOHNSON, SW;NORTH, RA
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DOI: 10.1016/j.neuropharm.2004.07.012
发表时间: 2004-01-01
期刊: NEUROPHARMACOLOGY
影响因子: 4.7
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通讯作者: Wise, RA