Cellular basis of itch sensation.

Cellular basis of itch sensation.
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DOI:
10.1126/science.1174868
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发表时间:
2009-09-18
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Chen ZF
Chen ZF
中科院分区:
其他
文献类型:
--
作者:
Sun YG;Zhao ZQ;Meng XL;Yin J;Liu XY;Chen ZF

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痒和痛是两种不同的感觉。虽然我们以前的研究表明,胃泌素释放肽受体(GRPR)是一个瘙痒特异性基因在脊髓,一个长期存在的问题,是否有单独的神经通路瘙痒和疼痛仍然没有解决。我们选择性地消融了表达GRPR的小鼠脊髓I层神经元。这些小鼠对所有测试的瘙痒(致瘙痒)刺激都表现出严重的抓挠缺陷,而与其组胺依赖性无关。相反,疼痛行为不受影响。我们的数据还表明,GRPR+神经元是不同的脊髓丘脑束神经元,一直是争论的焦点。总之,本研究表明,GRPR+神经元构成了一个长期寻找的标记线在脊髓瘙痒的感觉。
Itch and pain are two distinct sensations. Although our previous study suggested that gastrin-releasing peptide receptor (GRPR) is an itch-specific gene in the spinal cord, a long-standing question of whether there are separate neuronal pathways for itch and pain remains unsettled. We selectively ablated lamina I neurons expressing GRPR in the spinal cord of mice. These mice showed profound scratching deficits in response to all of the itching (pruritogenic) stimuli tested, irrespective of their histamine dependence. In contrast, pain behaviors were unaffected. Our data also suggest that GRPR+neurons are different from the spinothalamic tract neurons that have been the focus of the debate. Together, the present study suggests that GRPR+neurons constitute a long-sought labeled line for itch sensation in the spinal cord.
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