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Kesdoğan AB, Neureiter A, Gaebler AJ, Kalia AK, Körner J, Lampert A. Analgesic effect of Botulinum toxin in neuropathic pain is sodium channel independent. Neuropharmacology 2024; 253:109967. [PMID: 38657946 DOI: 10.1016/j.neuropharm.2024.109967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 02/26/2024] [Accepted: 04/20/2024] [Indexed: 04/26/2024]
Abstract
Botulinum neurotoxin type A BoNT/A is used off-label as a third line therapy for neuropathic pain. However, the mechanism of action remains unclear. In recent years, the role of voltage-gated sodium channels (Nav) in neuropathic pain became evident and it was suggested that block of sodium channels by BoNT/A would contribute to its analgesic effect. We assessed sodium channel function in the presence of BoNT/A in heterologously expressed Nav1.7, Nav1.3, and the neuronal cell line ND7/23 by high throughput automated and manual patch-clamp. We used both the full protein and the isolated catalytic light chain LC/A for acute or long-term extracellular or intracellular exposure. To assess the toxin's effect in a human cellular system, we differentiated induced pluripotent stem cells (iPSC) into sensory neurons from a healthy control and a patient suffering from a hereditary neuropathic pain syndrome (inherited erythromelalgia) carrying the Nav1.7/p.Q875E-mutation and carried out multielectrode-array measurements. Both BoNT/A and the isolated catalytic light chain LC/A showed limited effects in heterologous expression systems and the neuronal cell line ND7/23. Spontaneous activity in iPSC derived sensory neurons remained unaltered upon BoNT/A exposure both in neurons from the healthy control and the mutation carrying patient. BoNT/A may not specifically be beneficial in pain syndromes linked to sodium channel variants. The favorable effects of BoNT/A in neuropathic pain are likely based on mechanisms other than sodium channel blockage and new approaches to understand BoNT/A's therapeutic effects are necessary.
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Affiliation(s)
- Aylin B Kesdoğan
- Institute of Neurophysiology, RWTH Aachen University Hospital, Pauwelsstr. 30, 52074, Aachen, Germany; Scientific Center for Neuropathic Pain Research Aachen, SCN(Aachen), RWTH Aachen University Hospital, Pauwelsstr. 30, 52074, Aachen, Germany
| | - Anika Neureiter
- Institute of Neurophysiology, RWTH Aachen University Hospital, Pauwelsstr. 30, 52074, Aachen, Germany
| | - Arnim J Gaebler
- Institute of Neurophysiology, RWTH Aachen University Hospital, Pauwelsstr. 30, 52074, Aachen, Germany; Department of Psychiatry, Psychotherapy and Psychosomatics, Medical Faculty, RWTH Aachen University Hospital, Pauwelsstr. 30, 52074, Aachen, Germany
| | - Anil K Kalia
- Institute of Neurophysiology, RWTH Aachen University Hospital, Pauwelsstr. 30, 52074, Aachen, Germany
| | - Jannis Körner
- Institute of Neurophysiology, RWTH Aachen University Hospital, Pauwelsstr. 30, 52074, Aachen, Germany; Department of Anesthesiology, Medical Faculty, RWTH Aachen University Hospital, Pauwelsstr. 30, 52074, Aachen, Germany; Department of Intensive and Intermediate Care, Medical Faculty, RWTH Aachen University Hospital, Pauwelsstr. 30, 52074, Aachen, Germany; Scientific Center for Neuropathic Pain Research Aachen, SCN(Aachen), RWTH Aachen University Hospital, Pauwelsstr. 30, 52074, Aachen, Germany.
| | - Angelika Lampert
- Institute of Neurophysiology, RWTH Aachen University Hospital, Pauwelsstr. 30, 52074, Aachen, Germany; Scientific Center for Neuropathic Pain Research Aachen, SCN(Aachen), RWTH Aachen University Hospital, Pauwelsstr. 30, 52074, Aachen, Germany
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Glycogen Synthase Kinase 3: Ion Channels, Plasticity, and Diseases. Int J Mol Sci 2022; 23:ijms23084413. [PMID: 35457230 PMCID: PMC9028019 DOI: 10.3390/ijms23084413] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/13/2022] [Accepted: 04/14/2022] [Indexed: 12/15/2022] Open
Abstract
Glycogen synthase kinase 3β (GSK3) is a multifaceted serine/threonine (S/T) kinase expressed in all eukaryotic cells. GSK3β is highly enriched in neurons in the central nervous system where it acts as a central hub for intracellular signaling downstream of receptors critical for neuronal function. Unlike other kinases, GSK3β is constitutively active, and its modulation mainly involves inhibition via upstream regulatory pathways rather than increased activation. Through an intricate converging signaling system, a fine-tuned balance of active and inactive GSK3β acts as a central point for the phosphorylation of numerous primed and unprimed substrates. Although the full range of molecular targets is still unknown, recent results show that voltage-gated ion channels are among the downstream targets of GSK3β. Here, we discuss the direct and indirect mechanisms by which GSK3β phosphorylates voltage-gated Na+ channels (Nav1.2 and Nav1.6) and voltage-gated K+ channels (Kv4 and Kv7) and their physiological effects on intrinsic excitability, neuronal plasticity, and behavior. We also present evidence for how unbalanced GSK3β activity can lead to maladaptive plasticity that ultimately renders neuronal circuitry more vulnerable, increasing the risk for developing neuropsychiatric disorders. In conclusion, GSK3β-dependent modulation of voltage-gated ion channels may serve as an important pharmacological target for neurotherapeutic development.
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Spinal cord injury-mediated changes in electrophysiological properties of rat gastric nodose ganglion neurons. Exp Neurol 2022; 348:113927. [PMID: 34798136 PMCID: PMC8727501 DOI: 10.1016/j.expneurol.2021.113927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 10/30/2021] [Accepted: 11/11/2021] [Indexed: 02/03/2023]
Abstract
In preclinical rodent models, spinal cord injury (SCI) manifests as gastric vagal afferent dysfunction both acutely and chronically. However, the mechanism that underlies this dysfunction remains unknown. In the current study, we examined the effect of SCI on gastric nodose ganglia (NG) neuron excitability and on voltage-gated Na+ (NaV) channels expression and function in rats after an acute (i.e. 3-days) and chronic (i.e. 3-weeks) period. Rats randomly received either T3-SCI or sham control surgery 3-days or 3-weeks prior to experimentation as well as injections of 3% DiI solution into the stomach to identify gastric NG neurons. Single cell qRT-PCR was performed on acutely dissociated DiI-labeled NG neurons to measure NaV1.7, NaV1.8 and NaV1.9 expression levels. The results indicate that all 3 channel subtypes decreased. Current- and voltage-clamp whole-cell patch-clamp recordings were performed on acutely dissociated DiI-labeled NG neurons to measure active and passive properties of C- and A-fibers as well as the biophysical characteristics of NaV1.8 channels in gastric NG neurons. Acute and chronic SCI did not demonstrate deleterious effects on either passive properties of dissociated gastric NG neurons or biophysical properties of NaV1.8. These findings suggest that although NaV gene expression levels change following SCI, NaV1.8 function is not altered. The disruption throughout the entirety of the vagal afferent neuron has yet to be investigated.
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Abderemane-Ali F, Rossen ND, Kobiela ME, Craig RA, Garrison CE, Chen Z, Colleran CM, O’Connell LA, Du Bois J, Dumbacher JP, Minor DL. Evidence that toxin resistance in poison birds and frogs is not rooted in sodium channel mutations and may rely on "toxin sponge" proteins. J Gen Physiol 2021; 153:e202112872. [PMID: 34351379 PMCID: PMC8348241 DOI: 10.1085/jgp.202112872] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 05/30/2021] [Accepted: 07/01/2021] [Indexed: 12/18/2022] Open
Abstract
Many poisonous organisms carry small-molecule toxins that alter voltage-gated sodium channel (NaV) function. Among these, batrachotoxin (BTX) from Pitohui poison birds and Phyllobates poison frogs stands out because of its lethality and unusual effects on NaV function. How these toxin-bearing organisms avoid autointoxication remains poorly understood. In poison frogs, a NaV DIVS6 pore-forming helix N-to-T mutation has been proposed as the BTX resistance mechanism. Here, we show that this variant is absent from Pitohui and poison frog NaVs, incurs a strong cost compromising channel function, and fails to produce BTX-resistant channels in poison frog NaVs. We also show that captivity-raised poison frogs are resistant to two NaV-directed toxins, BTX and saxitoxin (STX), even though they bear NaVs sensitive to both. Moreover, we demonstrate that the amphibian STX "toxin sponge" protein saxiphilin is able to protect and rescue NaVs from block by STX. Taken together, our data contradict the hypothesis that BTX autoresistance is rooted in the DIVS6 N→T mutation, challenge the idea that ion channel mutations are a primary driver of toxin resistance, and suggest the possibility that toxin sequestration mechanisms may be key for protecting poisonous species from the action of small-molecule toxins.
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Affiliation(s)
- Fayal Abderemane-Ali
- Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA
| | - Nathan D. Rossen
- Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA
| | - Megan E. Kobiela
- School of Biological Sciences, University of Nebraska–Lincoln, Lincoln, NE
| | | | | | - Zhou Chen
- Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA
| | - Claire M. Colleran
- Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA
| | | | - J. Du Bois
- Department of Chemistry, Stanford University, Stanford, CA
| | - John P. Dumbacher
- Institute for Biodiversity Science and Sustainability, California Academy of Sciences, San Francisco, CA
- Department of Biology, San Francisco State University, San Francisco, CA
| | - Daniel L. Minor
- Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA
- Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA
- Department of Cellular and Molecular Pharmacology, University of California, San Francisco, San Francisco, CA
- California Institute for Quantitative Biomedical Research, University of California, San Francisco, San Francisco, CA
- Kavli Institute for Fundamental Neuroscience, University of California, San Francisco, San Francisco, CA
- Molecular Biophysics and Integrated Bio-imaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA
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Luo L, Song S, Ezenwukwa CC, Jalali S, Sun B, Sun D. Ion channels and transporters in microglial function in physiology and brain diseases. Neurochem Int 2020; 142:104925. [PMID: 33248207 DOI: 10.1016/j.neuint.2020.104925] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 11/18/2020] [Accepted: 11/19/2020] [Indexed: 12/19/2022]
Abstract
Microglial cells interact with all components of the central nervous system (CNS) and are increasingly recognized to play essential roles during brain development, homeostasis and disease pathologies. Functions of microglia include maintaining tissue integrity, clearing cellular debris and dead neurons through the process of phagocytosis, and providing tissue repair by releasing anti-inflammatory cytokines and neurotrophic factors. Changes of microglial ionic homeostasis (Na+, Ca2+, K+, H+, Cl-) are important for microglial activation, including proliferation, migration, cytokine release and reactive oxygen species production, etc. These are mediated by ion channels and ion transporters in microglial cells. Here, we review the current knowledge about the role of major microglial ion channels and transporters, including several types of Ca2+ channels (store-operated Ca2+ entry (SOCE) channels, transient receptor potential (TRP) channels and voltage-gated Ca2+ channels (VGCCs)) and Na+ channels (voltage-gated Na+ channels (Nav) and acid-sensing ion channels (ASICs)), K+ channels (inward rectifier K+ channels (Kir), voltage-gated K+ channels (KV) and calcium-activated K+ channels (KCa)), proton channels (voltage-gated proton channel (Hv1)), and Cl- channels (volume (or swelling)-regulated Cl- channels (VRCCs) and chloride intracellular channels (CLICs)). In addition, ion transporter proteins such as Na+/Ca2+ exchanger (NCX), Na+-K+-Cl- cotransporter (NKCC1), and Na+/H+ exchanger (NHE1) are also involved in microglial function in physiology and brain diseases. We discussed microglial activation and neuroinflammation in relation to the ion channel/transporter stimulation under brain disease conditions and therapeutic aspects of targeting microglial ion channels/transporters for neurodegenerative disease, ischemic stroke, traumatic brain injury and neuropathic pain.
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Affiliation(s)
- Lanxin Luo
- Institute of Medical Research, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China; Department of Neurology, University of Pittsburgh, Pittsburgh, PA, 15213, USA; Pittsburgh Institute for Neurodegenerative Disorders, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - Shanshan Song
- Department of Neurology, University of Pittsburgh, Pittsburgh, PA, 15213, USA; Pittsburgh Institute for Neurodegenerative Disorders, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | | | - Shayan Jalali
- Department of Neurology, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - Baoshan Sun
- Pólo DoisPortos, Instituto National de InvestigaçãoAgrária e Veterinária, I.P., Quinta da Almoinha, DoisPortos, 2565-191, Portugal.
| | - Dandan Sun
- Department of Neurology, University of Pittsburgh, Pittsburgh, PA, 15213, USA; Pittsburgh Institute for Neurodegenerative Disorders, University of Pittsburgh, Pittsburgh, PA, 15213, USA; Veterans Affairs Pittsburgh Health Care System, Geriatric Research, Educational and Clinical Center, Pittsburgh, PA, 15213, USA.
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Gradek F, Lopez-Charcas O, Chadet S, Poisson L, Ouldamer L, Goupille C, Jourdan ML, Chevalier S, Moussata D, Besson P, Roger S. Sodium Channel Na v1.5 Controls Epithelial-to-Mesenchymal Transition and Invasiveness in Breast Cancer Cells Through its Regulation by the Salt-Inducible Kinase-1. Sci Rep 2019; 9:18652. [PMID: 31819138 PMCID: PMC6901527 DOI: 10.1038/s41598-019-55197-5] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 11/21/2019] [Indexed: 12/11/2022] Open
Abstract
Loss of epithelial polarity and gain in invasiveness by carcinoma cells are critical events in the aggressive progression of cancers and depend on phenotypic transition programs such as the epithelial-to-mesenchymal transition (EMT). Many studies have reported the aberrant expression of voltage-gated sodium channels (NaV) in carcinomas and specifically the NaV1.5 isoform, encoded by the SCN5A gene, in breast cancer. NaV1.5 activity, through an entry of sodium ions, in breast cancer cells is associated with increased invasiveness, but its participation to the EMT has to be clarified. In this study, we show that reducing the expression of NaV1.5 in highly aggressive human MDA-MB-231 breast cancer cells reverted the mesenchymal phenotype, reduced cancer cell invasiveness and the expression of the EMT-promoting transcription factor SNAI1. The heterologous expression of NaV1.5 in weakly invasive MCF-7 breast cancer cells induced their expression of both SNAI1 and ZEB1 and increased their invasive capacities. In MCF-7 cells the stimulation with the EMT-activator signal TGF-β1 increased the expression of SCN5A. Moreover, the reduction of the salt-inducible kinase 1 (SIK1) expression promoted NaV1.5-dependent invasiveness and expression of EMT-associated transcription factor SNAI1. Altogether, these results indicated a prominent role of SIK1 in regulating NaV1.5-dependent EMT and invasiveness.
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Affiliation(s)
- Frédéric Gradek
- EA4245 Transplantation, Immunologie, Inflammation; Université de Tours, Tours, France
| | - Osbaldo Lopez-Charcas
- EA4245 Transplantation, Immunologie, Inflammation; Université de Tours, Tours, France
| | - Stéphanie Chadet
- EA4245 Transplantation, Immunologie, Inflammation; Université de Tours, Tours, France
| | - Lucile Poisson
- EA4245 Transplantation, Immunologie, Inflammation; Université de Tours, Tours, France.,Inserm UMR1069, Nutrition, Croissance et Cancer; Université de Tours, Tours, France
| | - Lobna Ouldamer
- Inserm UMR1069, Nutrition, Croissance et Cancer; Université de Tours, Tours, France.,CHRU de Tours, Tours, France
| | - Caroline Goupille
- Inserm UMR1069, Nutrition, Croissance et Cancer; Université de Tours, Tours, France.,CHRU de Tours, Tours, France
| | - Marie-Lise Jourdan
- Inserm UMR1069, Nutrition, Croissance et Cancer; Université de Tours, Tours, France.,CHRU de Tours, Tours, France
| | - Stéphan Chevalier
- Inserm UMR1069, Nutrition, Croissance et Cancer; Université de Tours, Tours, France
| | - Driffa Moussata
- EA4245 Transplantation, Immunologie, Inflammation; Université de Tours, Tours, France.,CHRU de Tours, Tours, France
| | - Pierre Besson
- Inserm UMR1069, Nutrition, Croissance et Cancer; Université de Tours, Tours, France
| | - Sébastien Roger
- EA4245 Transplantation, Immunologie, Inflammation; Université de Tours, Tours, France. .,Institut Universitaire de France, Paris, France.
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Ca 2+-dependent recruitment of voltage-gated sodium channels underlies bilirubin-induced overexcitation and neurotoxicity. Cell Death Dis 2019; 10:774. [PMID: 31601780 PMCID: PMC6787254 DOI: 10.1038/s41419-019-1979-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 09/10/2019] [Accepted: 09/13/2019] [Indexed: 02/08/2023]
Abstract
Neonatal jaundice is prevalent among newborns and can lead to severe neurological deficits, particularly sensorimotor dysfunction. Previous studies have shown that bilirubin (BIL) enhances the intrinsic excitability of central neurons and this can potentially contribute to their overexcitation, Ca2+ overload, and neurotoxicity. However, the cellular mechanisms underlying elevated neuronal excitability remain unknown. By performing patch-clamp recordings from neonatal neurons in the rat medial vestibular nucleus (MVN), a crucial relay station for locomotor and balance control, we found that BIL (3 μM) drastically increases the spontaneous firing rates by upregulating the current-mediated voltage-gated sodium channels (VGSCs), while shifting their voltage-dependent activation toward more hyperpolarized potentials. Immunofluorescence labeling and western immunoblotting with an anti-NaV1.1 antibody, revealed that BIL elevates the expression of VGSCs by promoting their recruitment to the membrane. Furthermore, we found that this VGSC-trafficking process is Ca2+ dependent because preloading MVN neurons with the Ca2+ buffer BAPTA-AM, or exocytosis inhibitor TAT-NSF700, prevents the effects of BIL, indicating the upregulated activity and density of functional VGSCs as the core mechanism accountable for the BIL-induced overexcitation of neonatal neurons. Most importantly, rectification of such overexcitation with a low dose of VGSC blocker lidocaine significantly attenuates BIL-induced cell death. We suggest that this enhancement of VGSC currents directly contributes to the vulnerability of neonatal brain to hyperbilirubinemia, implicating the activity and trafficking of NaV1.1 channels as a potential target for neuroprotection in cases of severe jaundice.
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Cheng J, Wen J, Wang N, Wang C, Xu Q, Yang Y. Ion Channels and Vascular Diseases. Arterioscler Thromb Vasc Biol 2019; 39:e146-e156. [DOI: 10.1161/atvbaha.119.312004] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Jun Cheng
- From the Key Lab of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological Key Lab of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, China (J.C., J.W., N.W., Q.X., Y.Y.)
| | - Jing Wen
- From the Key Lab of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological Key Lab of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, China (J.C., J.W., N.W., Q.X., Y.Y.)
| | - Na Wang
- From the Key Lab of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological Key Lab of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, China (J.C., J.W., N.W., Q.X., Y.Y.)
| | - Claire Wang
- Gonville and Caius College, University of Cambridge, United Kingdom (C.W.)
| | - Qingbo Xu
- From the Key Lab of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological Key Lab of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, China (J.C., J.W., N.W., Q.X., Y.Y.)
- School of Cardiovascular Medicine and Sciences, King’s College London BHF Centre, London, United Kingdom (Q.X.)
| | - Yan Yang
- From the Key Lab of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological Key Lab of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, China (J.C., J.W., N.W., Q.X., Y.Y.)
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