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Krotov V, Agashkov K, Romanenko S, Halaidych O, Andrianov Y, Safronov BV, Belan P, Voitenko N. Elucidating afferent-driven presynaptic inhibition of primary afferent input to spinal laminae I and X. Front Cell Neurosci 2023; 16:1029799. [PMID: 36713779 PMCID: PMC9874151 DOI: 10.3389/fncel.2022.1029799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 12/14/2022] [Indexed: 01/13/2023] Open
Abstract
Although spinal processing of sensory information greatly relies on afferent-driven (AD) presynaptic inhibition (PI), our knowledge about how it shapes peripheral input to different types of nociceptive neurons remains insufficient. Here we examined the AD-PI of primary afferent input to spinal neurons in the marginal layer, lamina I, and the layer surrounding the central canal, lamina X; two nociceptive-processing regions with similar patterns of direct supply by Aδ- and C-afferents. Unmyelinated C-fibers were selectively activated by electrical stimuli of negative polarity that induced an anodal block of myelinated Aβ/δ-fibers. Combining this approach with the patch-clamp recording in an ex vivo spinal cord preparation, we found that attenuation of the AD-PI by the anodal block of Aβ/δ-fibers resulted in the appearance of new mono- and polysynaptic C-fiber-mediated excitatory postsynaptic current (EPSC) components. Such homosegmental Aβ/δ-AD-PI affected neurons in the segment of the dorsal root entrance as well as in the adjacent rostral segment. In their turn, C-fibers from the L5 dorsal root induced heterosegmental AD-PI of the inputs from the L4 Aδ- and C-afferents to the neurons in the L4 segment. The heterosegmental C-AD-PI was reciprocal since the L4 C-afferents inhibited the L5 Aδ- and C-fiber inputs, as well as some direct L5 Aβ-fiber inputs. Moreover, the C-AD-PI was found to control the spike discharge in spinal neurons. Given that the homosegmental Aβ/δ-AD-PI and heterosegmental C-AD-PI affected a substantial percentage of lamina I and X neurons, we suggest that these basic mechanisms are important for shaping primary afferent input to the neurons in the spinal nociceptive-processing network.
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Affiliation(s)
- Volodymyr Krotov
- Department of Sensory Signaling, Bogomoletz Institute of Physiology, Kyiv, Ukraine,Department of Molecular Biophysics, Bogomoletz Institute of Physiology, Kyiv, Ukraine,*Correspondence: Volodymyr Krotov,
| | - Kirill Agashkov
- Department of Sensory Signaling, Bogomoletz Institute of Physiology, Kyiv, Ukraine
| | - Sergii Romanenko
- Department of Sensory Signaling, Bogomoletz Institute of Physiology, Kyiv, Ukraine
| | - Oleh Halaidych
- Department of Sensory Signaling, Bogomoletz Institute of Physiology, Kyiv, Ukraine
| | - Yaroslav Andrianov
- Department of Sensory Signaling, Bogomoletz Institute of Physiology, Kyiv, Ukraine
| | - Boris V. Safronov
- i3S-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal,Neuronal Networks Group, Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
| | - Pavel Belan
- Department of Molecular Biophysics, Bogomoletz Institute of Physiology, Kyiv, Ukraine,Department of Biomedicine and Neuroscience, Kyiv Academic University, Kyiv, Ukraine
| | - Nana Voitenko
- Department of Sensory Signaling, Bogomoletz Institute of Physiology, Kyiv, Ukraine,Department of Biomedicine and Neuroscience, Kyiv Academic University, Kyiv, Ukraine,Dobrobut Academy Medical School, Kyiv, Ukraine
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Krotov V, Agashkov K, Krasniakova M, Safronov BV, Belan P, Voitenko N. Segmental and descending control of primary afferent input to the spinal lamina X. Pain 2022; 163:2014-2020. [PMID: 35297816 PMCID: PMC9339045 DOI: 10.1097/j.pain.0000000000002597] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 01/03/2022] [Accepted: 01/20/2022] [Indexed: 02/04/2023]
Abstract
ABSTRACT Despite being involved in a number of functions, such as nociception and locomotion, spinal lamina X remains one of the least studied central nervous system regions. Here, we show that Aδ- and C-afferent inputs to lamina X neurons are presynaptically inhibited by homo- and heterosegmental afferents as well as by descending fibers from the corticospinal tract, dorsolateral funiculus, and anterior funiculus. Activation of descending tracts suppresses primary afferent-evoked action potentials and also elicits excitatory (mono- and polysynaptic) and inhibitory postsynaptic responses in lamina X neurons. Thus, primary afferent input to lamina X is subject to both spinal and supraspinal control being regulated by at least 5 distinct pathways.
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Affiliation(s)
- Volodymyr Krotov
- Departments of Sensory Signaling and
- Molecular Biophysics, Bogomoletz Institute of Physiology, Kyiv, Ukraine
| | | | | | - Boris V. Safronov
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- Neuronal Networks Group, Instituto de Biologia Molecular e Celular (IBMC), Universidade do Porto, Porto, Portugal
| | - Pavel Belan
- Molecular Biophysics, Bogomoletz Institute of Physiology, Kyiv, Ukraine
- Kyiv Academic University, Kyiv, Ukraine
| | - Nana Voitenko
- Departments of Sensory Signaling and
- Kyiv Academic University, Kyiv, Ukraine
- Private Institution Dobrobut Academy, Kyiv, Ukraine
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Tadokoro T, Bravo-Hernandez M, Agashkov K, Kobayashi Y, Platoshyn O, Navarro M, Marsala S, Miyanohara A, Yoshizumi T, Shigyo M, Krotov V, Juhas S, Juhasova J, Nguyen D, Kupcova Skalnikova H, Motlik J, Studenovska H, Proks V, Reddy R, Driscoll SP, Glenn TD, Kemthong T, Malaivijitnond S, Tomori Z, Vanicky I, Kakinohana M, Pfaff SL, Ciacci J, Belan P, Marsala M. Precision spinal gene delivery-induced functional switch in nociceptive neurons reverses neuropathic pain. Mol Ther 2022; 30:2722-2745. [PMID: 35524407 PMCID: PMC9372322 DOI: 10.1016/j.ymthe.2022.04.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 03/31/2022] [Accepted: 04/29/2022] [Indexed: 11/17/2022] Open
Abstract
Second-order spinal cord excitatory neurons play a key role in spinal processing and transmission of pain signals to the brain. Exogenously-induced change in developmentally-imprinted excitatory neurotransmitter phenotype of these neurons to inhibitory has not yet been achieved. Here we use a subpial dorsal horn-targeted delivery of AAV (adeno-associated virus) vector(s) encoding GABA (gamma-Aminobutyric acid,) synthesizing-releasing inhibitory machinery in mice with neuropathic pain. Treated animals showed a progressive and complete reversal of neuropathic pain (tactile and brush-evoked pain behavior) which persisted for minimum 2.5 months post-treatment. The mechanism of this treatment effect results from the switch of excitatory to preferential inhibitory neurotransmitter phenotype in dorsal horn nociceptive neurons and a resulting increase in inhibitory activity in regional spinal circuitry after peripheral nociceptive stimulation. No detectable side effects (such as sedation, motor weakness or loss of normal sensation) were seen between 2-13 months post-treatment in naive adult mice, pigs and non-human primates. The use of this treatment approach may represent a potent and safe treatment modality in patients suffering from spinal cord- or peripheral nerve-injury induced neuropathic pain.
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Affiliation(s)
- Takahiro Tadokoro
- Neuroregeneration Laboratory, Department of Anesthesiology, University of California, San Diego (UCSD), La Jolla, CA 92037, USA; Department of Anesthesiology, University of Ryukyus, Okinawa, Japan; Neurgain Technologies, 9620 Towne Centre Drive, Suite 100, San Diego, CA 92121, USA
| | - Mariana Bravo-Hernandez
- Neuroregeneration Laboratory, Department of Anesthesiology, University of California, San Diego (UCSD), La Jolla, CA 92037, USA
| | - Kirill Agashkov
- Departments of Sensory Signaling and Molecular Biophysics, Bogomoletz Institute of Physiology, Kyiv, Ukraine
| | - Yoshiomi Kobayashi
- Neuroregeneration Laboratory, Department of Anesthesiology, University of California, San Diego (UCSD), La Jolla, CA 92037, USA
| | - Oleksandr Platoshyn
- Neuroregeneration Laboratory, Department of Anesthesiology, University of California, San Diego (UCSD), La Jolla, CA 92037, USA
| | - Michael Navarro
- Neuroregeneration Laboratory, Department of Anesthesiology, University of California, San Diego (UCSD), La Jolla, CA 92037, USA
| | - Silvia Marsala
- Neuroregeneration Laboratory, Department of Anesthesiology, University of California, San Diego (UCSD), La Jolla, CA 92037, USA; Neurgain Technologies, 9620 Towne Centre Drive, Suite 100, San Diego, CA 92121, USA
| | - Atsushi Miyanohara
- Neuroregeneration Laboratory, Department of Anesthesiology, University of California, San Diego (UCSD), La Jolla, CA 92037, USA; Vector Core Laboratory, University of California, San Diego (UCSD), La Jolla, CA 92037, USA
| | - Tetsuya Yoshizumi
- Neuroregeneration Laboratory, Department of Anesthesiology, University of California, San Diego (UCSD), La Jolla, CA 92037, USA
| | - Michiko Shigyo
- Neuroregeneration Laboratory, Department of Anesthesiology, University of California, San Diego (UCSD), La Jolla, CA 92037, USA
| | - Volodymyr Krotov
- Departments of Sensory Signaling and Molecular Biophysics, Bogomoletz Institute of Physiology, Kyiv, Ukraine
| | - Stefan Juhas
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Rumburská 89, 277 21 Liběchov, Czech Republic
| | - Jana Juhasova
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Rumburská 89, 277 21 Liběchov, Czech Republic
| | - Duong Nguyen
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Rumburská 89, 277 21 Liběchov, Czech Republic
| | - Helena Kupcova Skalnikova
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Rumburská 89, 277 21 Liběchov, Czech Republic
| | - Jan Motlik
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Rumburská 89, 277 21 Liběchov, Czech Republic
| | - Hana Studenovska
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Department of Biomaterials and Bioanalogous Systems, Heyrovsky Square 2,162 06 Prague 6, Czech Republic
| | - Vladimir Proks
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Department of Biomaterials and Bioanalogous Systems, Heyrovsky Square 2,162 06 Prague 6, Czech Republic
| | - Rajiv Reddy
- Department of Anesthesiology, Pain Medicine, University of California, San Diego (UCSD), La Jolla, CA 92037, USA
| | - Shawn P Driscoll
- Gene Expression Laboratory and the Howard Hughes Medical Institute, Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Thomas D Glenn
- Gene Expression Laboratory and the Howard Hughes Medical Institute, Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Taratorn Kemthong
- National Primate Research Center of Thailand, Chulalongkorn University, Kaengkhoi District, Saraburi 18110, Thailand
| | - Suchinda Malaivijitnond
- National Primate Research Center of Thailand, Chulalongkorn University, Kaengkhoi District, Saraburi 18110, Thailand
| | - Zoltan Tomori
- Department of Biophysics, Institute of Experimental Physics, Slovak Academy of Sciences, Kosice, Slovakia
| | - Ivo Vanicky
- Institute of Neurobiology, Biomedical Research Center, Slovak Academy of Sciences, Kosice, Slovakia
| | | | - Samuel L Pfaff
- Gene Expression Laboratory and the Howard Hughes Medical Institute, Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Joseph Ciacci
- Department of Neurosurgery, University of California, San Diego (UCSD), La Jolla, CA 92037, USA
| | - Pavel Belan
- Departments of Sensory Signaling and Molecular Biophysics, Bogomoletz Institute of Physiology, Kyiv, Ukraine; Kyiv Academic University, Kyiv, Ukraine
| | - Martin Marsala
- Neuroregeneration Laboratory, Department of Anesthesiology, University of California, San Diego (UCSD), La Jolla, CA 92037, USA; Institute of Neurobiology, Biomedical Research Center, Slovak Academy of Sciences, Kosice, Slovakia.
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