Defining a Spinal Microcircuit that Gates Myelinated Afferent Input: Implications for Tactile Allodynia
Open accessAbstract
Chronic pain presents a major unmet clinical problem. The development of more effective treatments is hindered by our limited understanding of the neuronal circuits underlying sensory perception. Here, we show that parvalbumin (PV)-expressing dorsal horn interneurons modulate the passage of sensory information conveyed by low-threshold mechanoreceptors (LTMRs) directly via presynaptic inhibition and also gate the polysynaptic relay of LTMR input to pain circuits by inhibiting lamina II excitatory interneurons whose axons project into lamina I. We show changes in the functional properties of these PV interneurons following peripheral nerve injury and that silencing these cells unmasks a circuit that allows innocuous touch inputs to activate pain circuits by increasing network activity in laminae I-IV. Such changes are likely to result in the development of tactile allodynia and could be targeted for more effective treatment of mechanical pain.
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The Cdh3 dorsal inhibitory family comprised Inhib-6, Inhib-7, and Inhib-8 and are likely involved in dampening of dynamic touch and mechanical allodynia.
“The Cdh3 dorsal, inhibitory family was comprised of Inhib-6, Inhib-7, and Inhib-8 and are likely to be involved in the dampening of dynamic touch and therefore in mechanical allodynia70–72.”
From A harmonized atlas of mouse spinal cord cell types and their spatial organization (2021) · cites this paper as [70]
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Neuropeptide Y-expressing dorsal horn inhibitory interneurons gate spinal pain and itch signalling
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Neuropeptide Y-expressing dorsal horn inhibitory interneurons gate spinal pain and itch signallingPreprint
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- Authors
- Boyle, K. A., Gradwell, M. A., Yasaka, T., Dickie, A. C., Polgár, E., Ganley, R. P., Orr, D. P. H., Watanabe, M., Abraira, V. E., Kuehn, E. D., Zimmerman, A. L., Ginty, D. D., Callister, R. J., Graham, B. A., & Hughes, D. I.
- Affiliations
- University of Glasgow (GB)
- University of Newcastle Australia (AU)
- Saga University (JP)
- Hokkaido University (JP)
- Howard Hughes Medical Institute (US)
- Corresponding author
- Graham, Brett A.
- Hughes, David I.
- ORCID
- Venue
- Cell Reports
- Publisher
- Elsevier BV
- Published
- 2019-07
- Volume
- 28
- Issue
- 2
- Pages
- 526-540.e6
- ISSN
- 2211-1247 (ISSN-L)
- PMC
- PMC6635381
- OpenAlex
- W2961172235
- Cited by
- 131
- References
- 67
- Citations by year
- 2026: 18 · 2025: 12 · 2024: 17 · 2023: 22 · 2022: 26 · 2021: 14 · 2020: 20 · 2019: 2
- FWCI
- 10.63
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Cell Reports (publishedVersion, cc-by)
- SSRN Electronic Journal (acceptedVersion)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- ENLIGHTEN (Jurnal Bimbingan dan Konseling Islam) (acceptedVersion, cc-by-sa)
- Rutgers University Community Repository (Rutgers University) (submittedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
- Figshare (submittedVersion, cc-by)
- NOVA (University of Newcastle Australia) (submittedVersion, cc-by)
- Funders
- National Institutes of Health
- National Health and Medical Research Council
- Japan Society for the Promotion of Science
- Biotechnology and Biological Sciences Research Council
- Topics
- Health Sciences › Medicine › Physiology › Pain Mechanisms and Treatments
- Life Sciences › Neuroscience › Sensory Systems › Ion Channels and Receptors
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
- Keywords
- mechanical allodynia, parvalbumin interneurons, dorsal horn, presynaptic inhibition, low-threshold mechanoreceptors, peripheral nerve injury, chronic pain, mechanical pain, nociceptive circuits
- MeSH terms
- Animals, Hyperalgesia, Mechanoreceptors, Myelin Sheath, Mice, Chronic Pain
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