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A subpopulation of nociceptors specifically linked to itch
Open accessAbstract
Itch-specific neurons have been sought for decades. The existence of such neurons has been doubted recently as a result of the observation that itch-mediating neurons also respond to painful stimuli. We genetically labeled and manipulated MrgprA3+ neurons in the dorsal root ganglion (DRG) and found that they exclusively innervated the epidermis of the skin and responded to multiple pruritogens. Ablation of MrgprA3+ neurons led to substantial reductions in scratching evoked by multiple pruritogens and occurring spontaneously under chronic itch conditions, whereas pain sensitivity remained intact. Notably, mice in which TRPV1 was exclusively expressed in MrgprA3+ neurons exhibited itch, but not pain, behavior in response to capsaicin. Although MrgprA3+ neurons were sensitive to noxious heat, activation of TRPV1 in these neurons by noxious heat did not alter pain behavior. These data suggest that MrgprA3 defines a specific subpopulation of DRG neurons mediating itch. Our study opens new avenues for studying itch and developing anti-pruritic therapies.
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Madisen, L., Zwingman, T. A., Sunkin, S. M., Oh, S. W., Zariwala, H. A., Gu, H., Ng, L. L., Palmiter, R. D., Hawrylycz, M. J., Jones, A. R., et al. (2010) · Nature Neuroscience · doi:10.1038/nn.2467 · Cited by 6,907
Cellular and Molecular Mechanisms of Pain
Basbaum, A. I., Bautista, D. M., Scherrer, G., & Julius, D. (2009) · Cell · doi:10.1016/j.cell.2009.09.028 · Cited by 4,344
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Self-citationCevikbas, F., Wang, X., Akiyama, T., Kempkes, C., Savinko, T., Antal, A., Kukova, G., Buhl, T., Ikoma, A., Buddenkotte, J., et al. (2014) · Journal of Allergy and Clinical Immunology · doi:10.1016/j.jaci.2013.10.048 · Cited by 804
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Metadata
- Authors
- Han, L., Ma, C., Liu, Q., Weng, H.-J., Cui, Y., Tang, Z., Kim, Y., Nie, H., Qu, L., Patel, K. N., Li, Z., McNeil, B., He, S., Guan, Y., Xiao, B., LaMotte, R. H., & Dong, X.
- Venue
- Nature Neuroscience
- Published
- 2012-12-23
- Volume
- 16
- Issue
- 2
- Pages
- 174-182
- ISSN
- 1097-6256 (ISSN-L)
- 1546-1726
- OpenAlex
- W1969655931
- Cited by
- 612
- References
- 2
- FWCI
- 20.85
- Type
- journal article
- Language
- en
- Open access
- green
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- Han, L., Ma, C., Liu, Q., Weng, H.-J., Cui, Y., Tang, Z., Kim, Y., Nie, H., Qu, L., Patel, K. N., Li, Z., McNeil, B., He, S., Guan, Y., Xiao, B., LaMotte, R. H., & Dong, X. (2013). A subpopulation of nociceptors specifically linked to itch. Nature Neuroscience. https://doi.org/10.1038/nn.3289
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