Mechanisms of Broad-Band UVB Irradiation‒Induced Itch in Mice.

Mechanisms of Broad-Band UVB Irradiation‒Induced Itch in Mice.
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DOI:
10.1016/j.jid.2021.03.015
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发表时间:
2021-10
期刊:
The Journal of investigative dermatology
影响因子:
--
通讯作者:
Hu H
Hu H
中科院分区:
其他
文献类型:
--
作者:
Cao L;Yue X;Zhao Y;Du L;Xie Z;Yuan Y;Zhang S;Li F;Feng J;Hu H

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尽管晒伤会产生严重的不可控制的瘙痒,但由于缺乏实验性的晒伤动物模型,因此对紫外线(UV)辐照引起的瘙痒的潜在机制知之甚少。在这里,我们建立了与晒伤相关的小鼠模型,发现宽带UVB(BB-UVB)辐射引起了小鼠的刮擦,但没有擦拭行为。通过将活细胞CA2+成像和定量RT-PCR结合在背根神经节(DRG)神经元,苏木精和曙红染色,皮肤制剂的免疫荧光染色,行为测试的免疫荧光染色,与遗传学和药理方法结合使用,但我们表明trpv1型DRGNGNGNG-MAST与MAST相结合。痒。此外,TRPV1功能的遗传学和药理抑制都显着缓解了BB-UVB辐射诱导的瘙痒反应。总体而言,我们的结果表明,BB-UVB辐射通过促进DRG神经元中的TRPV1通道功能引起小鼠的瘙痒感,并为晒伤相关的瘙痒提供了潜在的治疗靶标。
Although sunburn can produce severe uncontrollable itching, the underlying mechanisms of ultraviolet (UV) irradiation-induced itch are poorly understood because of a lack of experimental animal models of sunburn itch. Here we established a sunburn-related mouse model and found that Broad-band UVB (BB-UVB) irradiation elicited scratching but not wiping behavior in mice. By using a combination of live-cell Ca2+ imaging and quantitative RT-PCR on dorsal root ganglion (DRG) neurons, hematoxylin and eosin staining, immunofluorescence staining of skin preparations, behavioral testing, in combination with genetic and pharmacological approaches, we showed that TRPV1-positive DRG neurons but not mast cells are involved in BB-UVB irradiation-induced itch. Moreover, both genetic and pharmacological inhibition of TRPV1 function significantly alleviated BB-UVB irradiation-induced itch response. Collectively, our results suggest that BB-UVB irradiation evokes itch sensation in mice through promoting TRPV1 channel function in DRG neurons and provide potential therapeutic targets for sunburn-related itch.
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