1.Cortical Control of Itch Sensation by Vasoactive Intestinal Polypeptide-Expressing Interneurons in the Anterior Cingulate Cortex.
Yiwen ZHANG ; Jiaqi LI ; You WU ; Jialin SI ; Yuanyuan ZHU ; Meng NIAN ; Chen CHEN ; Ningcan MA ; Xiaolin ZHANG ; Yaoyuan ZHANG ; Yiting LIN ; Ling LIU ; Yang BAI ; Shengxi WU ; Jing HUANG
Neuroscience Bulletin 2025;41(12):2184-2200
The anterior cingulate cortex (ACC) has recently been proposed as a key player in the representation of itch stimuli. However, to date, little is known about the contribution of specific ACC interneuron populations to itch processing. Using c-Fos immunolabeling and in vivo Ca2+ imaging, we reported that both histamine and chloroquine stimuli-induced acute itch caused a marked enhancement of vasoactive intestinal peptide (VIP)-expressing interneuron activity in the ACC. Behavioral data indicated that optogenetic and chemogenetic activation of these neurons reduced scratching responses related to histaminergic and non-histaminergic acute itch. Similar neural activity and modulatory role of these neurons were seen in mice with chronic itch induced by contact dermatitis. Together, this study highlights the importance of ACC VIP+ neurons in modulating itch-related affect and behavior, which may help us to develop novel mechanism-based strategies to treat refractory chronic itch in the clinic.
Animals
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Pruritus/physiopathology*
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Vasoactive Intestinal Peptide/metabolism*
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Interneurons/metabolism*
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Gyrus Cinguli/metabolism*
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Mice
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Male
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Mice, Inbred C57BL
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Histamine
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Chloroquine
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Optogenetics
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Mice, Transgenic
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