A Context-Based Analgesia Model in Rats: Involvement of Prefrontal Cortex.

A Context-Based Analgesia Model in Rats: Involvement of Prefrontal Cortex.
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基于情境的大鼠镇痛模型:前额皮质的参与

DOI:
10.1007/s12264-018-0279-6
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发表时间:
2018-12
影响因子:
5.6
通讯作者:
Wan Y
Wan Y
中科院分区:
医学2区
文献类型:
--
作者:
Xu L;Wan Y;Ma L;Zheng J;Han B;Liu FY;Yi M;Wan Y

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认知和疼痛共享共同的神经基质并相互作用:慢性疼痛损害认知表现,而认知过程调节疼痛感知。在本研究中,我们建立了一种非药物依赖性的基于情境的镇痛大鼠模型,其中两种不同的情境(黑暗和明亮)在训练期间的热板测试中与高(52°C)或低(48°C)温度相匹配。在训练之前和之后,我们在两种情况下都将温度设置为高水平。在最初与低温相匹配的环境中,大鼠在试验中表现出比与高温相匹配的环境更长的舔爪时间,表明在大鼠中成功建立了基于环境的镇痛作用。在探测前腹腔内注射纳洛酮(阿片受体拮抗剂)可以阻断这种作用。在光遗传学激活或抑制双侧前额皮质的边缘下或边缘前亚区后,基于情境的镇痛效果也消失了。简而言之,我们建立了一个基于情境的,非药物依赖的,安慰剂样镇痛大鼠模型。该模型为研究疼痛的认知调节提供了一个新的有用的工具。
Cognition and pain share common neural substrates and interact reciprocally: chronic pain compromises cognitive performance, whereas cognitive processes modulate pain perception. In the present study, we established a non-drug-dependent rat model of context-based analgesia, where two different contexts (dark and bright) were matched with a high (52°C) or low (48°C) temperature in the hot-plate test during training. Before and after training, we set the temperature to the high level in both contexts. Rats showed longer paw licking latencies in trials with the context originally matched to a low temperature than those to a high temperature, indicating successful establishment of a context-based analgesic effect in rats. This effect was blocked by intraperitoneal injection of naloxone (an opioid receptor antagonist) before the probe. The context-based analgesic effect also disappeared after optogenetic activation or inhibition of the bilateral infralimbic or prelimbic sub-region of the prefrontal cortex. In brief, we established a context-based, non-drug dependent, placebo-like analgesia model in the rat. This model provides a new and useful tool for investigating the cognitive modulation of pain.
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发表时间: 2016-05-04
期刊: The Journal of neuroscience : the official journal of the Society for Neuroscience
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