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Vinnenberg L, Rychlik N, Oniani T, Williams B, White JA, Kovac S, Meuth SG, Budde T, Hundehege P. Assessing neuroprotective effects of diroximel fumarate and siponimod via modulation of pacemaker channels in an experimental model of remyelination. Exp Neurol 2024; 371:114572. [PMID: 37852467 DOI: 10.1016/j.expneurol.2023.114572] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 10/04/2023] [Accepted: 10/14/2023] [Indexed: 10/20/2023]
Abstract
Cuprizone (CPZ)-induced alterations in axonal myelination are associated with a period of neuronal hyperexcitability and increased activity of hyperpolarization-activated and cyclic nucleotide-gated (HCN) channels in the thalamocortical (TC) system. Substances used for the treatment of multiple sclerosis (MS) have been shown to normalize neuronal excitability in CPZ-treated mice. Therefore, we aimed to examine the effects of diroximel fumarate (DRF) and the sphingosine 1-phospate receptor (S1PR) modulator siponimod on action potential firing and the inward current (Ih) carried by HCN ion channels in naive conditions and during different stages of de- and remyelination. Here, DRF application reduced Ih current density in ex vivo patch clamp recordings from TC neurons of the ventrobasal thalamic complex (VB), thereby counteracting the increase of Ih during early remyelination. Siponimod reduced Ih in VB neurons under control conditions but had no effect in neurons of the auditory cortex (AU). Furthermore, siponimod increased and decreased AP firing properties of neurons in VB and AU, respectively. Computational modeling revealed that both DRF and siponimod influenced thalamic bursting during early remyelination by delaying the onset and decreasing the interburst frequency. Thus, substances used in MS treatment normalize excitability in the TC system by influencing AP firing and Ih.
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Affiliation(s)
- Laura Vinnenberg
- Department of Neurology with Institute of Translational Neurology, Münster University, Albert-Schweitzer-Campus 1, D-48149 Münster, Germany
| | - Nicole Rychlik
- Institute of Physiology I, Münster University, Robert-Koch-Str. 27a, D-48149 Münster, Germany.
| | - Tengiz Oniani
- Institute of Physiology I, Münster University, Robert-Koch-Str. 27a, D-48149 Münster, Germany
| | - Brandon Williams
- Department of Biomedical Engineering, Center for Systems Neuroscience, Neurophotonics Center, Boston University, 610 Commonwealth Ave, Boston MA-02215, USA
| | - John A White
- Department of Biomedical Engineering, Center for Systems Neuroscience, Neurophotonics Center, Boston University, 610 Commonwealth Ave, Boston MA-02215, USA
| | - Stjepana Kovac
- Department of Neurology with Institute of Translational Neurology, Münster University, Albert-Schweitzer-Campus 1, D-48149 Münster, Germany
| | - Sven G Meuth
- Neurology Clinic, Medical Faculty, University Clinic Düsseldorf, Moorenstraße 5, D-40225 Düsseldorf, Germany
| | - Thomas Budde
- Institute of Physiology I, Münster University, Robert-Koch-Str. 27a, D-48149 Münster, Germany
| | - Petra Hundehege
- Department of Neurology with Institute of Translational Neurology, Münster University, Albert-Schweitzer-Campus 1, D-48149 Münster, Germany
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Patberg M, Oniani T, Disse P, Peischard S, Vinnenberg L, Zobeiri M, Romanelli MN, Epping L, Wiendl H, Meuth SG, Hundehege P, Seebohm G, Budde T, Junker A. Optimized synthesis and pharmacological evaluation of HCN channel inhibitor EC18. Arch Pharm (Weinheim) 2023:e2200665. [PMID: 36949271 DOI: 10.1002/ardp.202200665] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 02/23/2023] [Accepted: 02/24/2023] [Indexed: 03/24/2023]
Abstract
HCN4 channels are considered to be a promising target for cardiac pathologies, epilepsy, and multiple sclerosis. However, there are no subtype-selective HCN channel blockers available, and only a few compounds are reported to display subtype preferences, one of which is EC18 (cis-1). Herein, we report the optimized synthetic route for the preparation of EC18 and its evaluation in three different pharmacological models, allowing us to assess its activity on cardiac function, thalamocortical neurons, and immune cells.
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Affiliation(s)
- Marius Patberg
- European Institute for Molecular Imaging (EIMI), Münster, Germany
| | | | - Paul Disse
- Cellular Electrophysiology and Molecular Biology, Institute for Genetics of Heart Diseases (IfGH), University of Münster, Münster, Germany
| | - Stefan Peischard
- Cellular Electrophysiology and Molecular Biology, Institute for Genetics of Heart Diseases (IfGH), University of Münster, Münster, Germany
| | - Laura Vinnenberg
- Klinik für Neurologie mit Institut für Translationale Neurologie, ICB, Münster, Germany
| | | | - Maria N Romanelli
- Department of Neurosciences, Psychology, Drug Research and Child Health (NeuroFarBa), University of Florence, Florence, Italy
| | - Lisa Epping
- Klinik für Neurologie mit Institut für Translationale Neurologie, ICB, Münster, Germany
| | - Heinz Wiendl
- Klinik für Neurologie mit Institut für Translationale Neurologie, ICB, Münster, Germany
| | - Sven G Meuth
- Universitätsklinikum Düsseldorf, Medizinische Fakultät, Klinik für Neurologie, Düsseldorf, Germany
| | - Petra Hundehege
- Klinik für Neurologie mit Institut für Translationale Neurologie, ICB, Münster, Germany
| | - Guiscard Seebohm
- Cellular Electrophysiology and Molecular Biology, Institute for Genetics of Heart Diseases (IfGH), University of Münster, Münster, Germany
| | | | - Anna Junker
- European Institute for Molecular Imaging (EIMI), Münster, Germany
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Oniani T, Vinnenberg L, Chaudhary R, Schreiber JA, Riske K, Williams B, Pape HC, White JA, Junker A, Seebohm G, Meuth SG, Hundehege P, Budde T, Zobeiri M. Effects of Axonal Demyelination, Inflammatory Cytokines and Divalent Cation Chelators on Thalamic HCN Channels and Oscillatory Bursting. Int J Mol Sci 2022; 23:ijms23116285. [PMID: 35682964 PMCID: PMC9181513 DOI: 10.3390/ijms23116285] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 05/31/2022] [Accepted: 05/31/2022] [Indexed: 12/13/2022] Open
Abstract
Multiple sclerosis (MS) is a demyelinating disease of the central nervous system that is characterized by the progressive loss of oligodendrocytes and myelin and is associated with thalamic dysfunction. Cuprizone (CPZ)-induced general demyelination in rodents is a valuable model for studying different aspects of MS pathology. CPZ feeding is associated with the altered distribution and expression of different ion channels along neuronal somata and axons. However, it is largely unknown whether the copper chelator CPZ directly influences ion channels. Therefore, we assessed the effects of different divalent cations (copper; zinc) and trace metal chelators (EDTA; Tricine; the water-soluble derivative of CPZ, BiMPi) on hyperpolarization-activated cyclic nucleotide-gated (HCN) channels that are major mediators of thalamic function and pathology. In addition, alterations of HCN channels induced by CPZ treatment and MS-related proinflammatory cytokines (IL-1β; IL-6; INF-α; INF-β) were characterized in C57Bl/6J mice. Thus, the hyperpolarization-activated inward current (Ih) was recorded in thalamocortical (TC) neurons and heterologous expression systems (mHCN2 expressing HEK cells; hHCN4 expressing oocytes). A number of electrophysiological characteristics of Ih (potential of half-maximal activation (V0.5); current density; activation kinetics) were unchanged following the extracellular application of trace metals and divalent cation chelators to native neurons, cell cultures or oocytes. Mice were fed a diet containing 0.2% CPZ for 35 days, resulting in general demyelination in the brain. Withdrawal of CPZ from the diet resulted in rapid remyelination, the effects of which were assessed at three time points after stopping CPZ feeding (Day1, Day7, Day25). In TC neurons, Ih was decreased on Day1 and Day25 and revealed a transient increased availability on Day7. In addition, we challenged naive TC neurons with INF-α and IL-1β. It was found that Ih parameters were differentially altered by the application of the two cytokines to thalamic cells, while IL-1β increased the availability of HCN channels (depolarized V0.5; increased current density) and the excitability of TC neurons (depolarized resting membrane potential (RMP); increased the number of action potentials (APs); produced a larger voltage sag; promoted higher input resistance; increased the number of burst spikes; hyperpolarized the AP threshold), INF-α mediated contrary effects. The effect of cytokine modulation on thalamic bursting was further assessed in horizontal slices and a computational model of slow thalamic oscillations. Here, IL-1β and INF-α increased and reduced oscillatory bursting, respectively. We conclude that HCN channels are not directly modulated by trace metals and divalent cation chelators but are subject to modulation by different MS-related cytokines.
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Affiliation(s)
- Tengiz Oniani
- Institute of Physiology I, Westfälische Wilhelms-Universität, Robert-Koch-Str. 27a, D-48149 Münster, Germany; (T.O.); (R.C.); (H.-C.P.); (M.Z.)
| | - Laura Vinnenberg
- Department of Neurology with Institute of Translational Neurology, Albert-Schweitzer-Campus 1, D-48149 Münster, Germany; (L.V.); (P.H.)
| | - Rahul Chaudhary
- Institute of Physiology I, Westfälische Wilhelms-Universität, Robert-Koch-Str. 27a, D-48149 Münster, Germany; (T.O.); (R.C.); (H.-C.P.); (M.Z.)
| | - Julian A. Schreiber
- Institute of Pharmaceutical and Medicinal Chemistry, Westfälische Wilhelms-Universität, Corren-Str. 48, D-48149 Münster, Germany;
- Cellular Electrophysiology and Molecular Biology, Department of Cardiovascular Medicine, Institute for Genetics of Heart Diseases (IfGH), University Hospital Münster, Robert-Koch-Str. 45, D-48149 Münster, Germany;
| | - Kathrin Riske
- European Institute for Molecular Imaging (EIMI), Westfälische Wilhelms-Universität, Waldeyer-Str. 15, D-48149 Münster, Germany; (K.R.); (A.J.)
| | - Brandon Williams
- Center for Systems Neuroscience, Neurophotonics Center, Department of Biomedical Engineering, Boston University, 610 Commonwealth Ave., Boston, MA 02215, USA; (B.W.); (J.A.W.)
| | - Hans-Christian Pape
- Institute of Physiology I, Westfälische Wilhelms-Universität, Robert-Koch-Str. 27a, D-48149 Münster, Germany; (T.O.); (R.C.); (H.-C.P.); (M.Z.)
| | - John A. White
- Center for Systems Neuroscience, Neurophotonics Center, Department of Biomedical Engineering, Boston University, 610 Commonwealth Ave., Boston, MA 02215, USA; (B.W.); (J.A.W.)
| | - Anna Junker
- European Institute for Molecular Imaging (EIMI), Westfälische Wilhelms-Universität, Waldeyer-Str. 15, D-48149 Münster, Germany; (K.R.); (A.J.)
| | - Guiscard Seebohm
- Cellular Electrophysiology and Molecular Biology, Department of Cardiovascular Medicine, Institute for Genetics of Heart Diseases (IfGH), University Hospital Münster, Robert-Koch-Str. 45, D-48149 Münster, Germany;
| | - Sven G. Meuth
- Neurology Clinic, University Clinic Düsseldorf, Moorenstraße 5, D-40225 Düsseldorf, Germany;
| | - Petra Hundehege
- Department of Neurology with Institute of Translational Neurology, Albert-Schweitzer-Campus 1, D-48149 Münster, Germany; (L.V.); (P.H.)
| | - Thomas Budde
- Institute of Physiology I, Westfälische Wilhelms-Universität, Robert-Koch-Str. 27a, D-48149 Münster, Germany; (T.O.); (R.C.); (H.-C.P.); (M.Z.)
- Correspondence:
| | - Mehrnoush Zobeiri
- Institute of Physiology I, Westfälische Wilhelms-Universität, Robert-Koch-Str. 27a, D-48149 Münster, Germany; (T.O.); (R.C.); (H.-C.P.); (M.Z.)
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Patberg M, Isaak A, Füsser F, Ortiz Zacarías NV, Vinnenberg L, Schulte J, Michetti L, Grey L, van der Horst C, Hundehege P, Koch O, Heitman LH, Budde T, Junker A. Piperazine squaric acid diamides, a novel class of allosteric P2X7 receptor antagonists. Eur J Med Chem 2021; 226:113838. [PMID: 34571173 DOI: 10.1016/j.ejmech.2021.113838] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 09/06/2021] [Accepted: 09/07/2021] [Indexed: 02/07/2023]
Abstract
The P2X7 receptor (P2X7R) stands out among the purinergic receptors due to its strong involvement in the regulation of tumor growth and metastasis formation as well as in innate immune responses and afferent signal transmission. Numerous studies have pointed out the beneficial effects of P2X7R antagonism for the treatment of a variety of cancer types, inflammatory diseases, and chronic pain. Herein we describe the development of novel P2X7R antagonists, incorporating piperazine squaric diamides as a central element. Besides improving the antagonists' potency from pIC50 values of 5.7-7.6, ADME properties (logD7.4 value, plasma protein binding, in vitro metabolic stability) of the generated compounds were investigated and optimized to provide novel P2X7R antagonists with drug-like properties. Furthermore, docking studies revealed the antagonists binding to the allosteric binding pocket in two distinct binding poses, depending on the substitution of the central piperazine moiety.
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Affiliation(s)
- Marius Patberg
- European Institute for Molecular Imaging (EIMI), Waldeyerstr. 15, 48149, Münster, Germany
| | - Andreas Isaak
- European Institute for Molecular Imaging (EIMI), Waldeyerstr. 15, 48149, Münster, Germany
| | - Friederike Füsser
- Institut für Pharmazeutische und Medizinische Chemie der Universität Münster, Corrensstr. 48, 48149, Münster, Germany
| | - Natalia V Ortiz Zacarías
- Leiden Academic Centre for Drug Research (LACDR), Leiden University, Division of Drug Discovery and Safety, Einsteinweg 55, 2333, CC Leiden, the Netherlands; Oncode Institute, Leiden, the Netherlands
| | - Laura Vinnenberg
- Klinik für Neurologie Mit Institut für Translationale Neurologie, ICB, Mendelstr. 7, 48149, Münster, Germany
| | - Janine Schulte
- European Institute for Molecular Imaging (EIMI), Waldeyerstr. 15, 48149, Münster, Germany
| | - Lucia Michetti
- European Institute for Molecular Imaging (EIMI), Waldeyerstr. 15, 48149, Münster, Germany
| | - Lucie Grey
- Institut für Pharmazeutische und Medizinische Chemie der Universität Münster, Corrensstr. 48, 48149, Münster, Germany
| | - Cas van der Horst
- Leiden Academic Centre for Drug Research (LACDR), Leiden University, Division of Drug Discovery and Safety, Einsteinweg 55, 2333, CC Leiden, the Netherlands
| | - Petra Hundehege
- Klinik für Neurologie Mit Institut für Translationale Neurologie, ICB, Mendelstr. 7, 48149, Münster, Germany
| | - Oliver Koch
- Institut für Pharmazeutische und Medizinische Chemie der Universität Münster, Corrensstr. 48, 48149, Münster, Germany
| | - Laura H Heitman
- Leiden Academic Centre for Drug Research (LACDR), Leiden University, Division of Drug Discovery and Safety, Einsteinweg 55, 2333, CC Leiden, the Netherlands; Oncode Institute, Leiden, the Netherlands
| | - Thomas Budde
- Institut für Physiologie I, Robert-Koch-Str. 27a, 48149, Münster, Germany
| | - Anna Junker
- European Institute for Molecular Imaging (EIMI), Waldeyerstr. 15, 48149, Münster, Germany.
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Vinnenberg L, Bock S, Hundehege P, Ruck T, Meuth SG. Impact of Diverse Ion Channels on Regulatory T Cell Functions. Cell Physiol Biochem 2021; 55:145-156. [PMID: 34043301 DOI: 10.33594/000000375] [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] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/12/2021] [Indexed: 11/06/2022] Open
Abstract
The population of regulatory T cells (Tregs) is critical for immunological self-tolerance and homeostasis. Proper ion regulation contributes to Treg lineage identity, regulation, and effector function. Identified ion channels include Ca2+ release-activated Ca2+, transient receptor potential, P2X, volume-regulated anion and K+ channels Kv1.3 and KCa3.1. Ion channel modulation represents a promising therapeutic approach for the treatment of autoimmune diseases such as rheumatoid arthritis and multiple sclerosis. This review summarizes studies with gene-targeted mice and pharmacological modulators affecting Treg number and function. Furthermore, participation of ion channels is illustrated and the power of future research possibilities is discussed.
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Affiliation(s)
- Laura Vinnenberg
- Department of Neurology, Institute of Translational Neurology, University Hospital Muenster, Muenster, Germany
| | - Stefanie Bock
- Department of Neurology, Institute of Translational Neurology, University Hospital Muenster, Muenster, Germany
| | - Petra Hundehege
- Department of Neurology, Institute of Translational Neurology, University Hospital Muenster, Muenster, Germany
| | - Tobias Ruck
- Department of Neurology, University Hospital Duesseldorf, Duesseldorf, Germany
| | - Sven G Meuth
- Department of Neurology, University Hospital Duesseldorf, Duesseldorf, Germany,
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Domingues AF, Kulkarni R, Giotopoulos G, Gupta S, Vinnenberg L, Arede L, Foerner E, Khalili M, Adao RR, Johns A, Tan S, Zeka K, Huntly BJ, Prabakaran S, Pina C. Loss of Kat2a enhances transcriptional noise and depletes acute myeloid leukemia stem-like cells. eLife 2020; 9:e51754. [PMID: 31985402 PMCID: PMC7039681 DOI: 10.7554/elife.51754] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [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: 09/09/2019] [Accepted: 01/24/2020] [Indexed: 12/21/2022] Open
Abstract
Acute Myeloid Leukemia (AML) is an aggressive hematological malignancy with abnormal progenitor self-renewal and defective white blood cell differentiation. Its pathogenesis comprises subversion of transcriptional regulation, through mutation and by hijacking normal chromatin regulation. Kat2a is a histone acetyltransferase central to promoter activity, that we recently associated with stability of pluripotency networks, and identified as a genetic vulnerability in AML. Through combined chromatin profiling and single-cell transcriptomics of a conditional knockout mouse, we demonstrate that Kat2a contributes to leukemia propagation through preservation of leukemia stem-like cells. Kat2a loss impacts transcription factor binding and reduces transcriptional burst frequency in a subset of gene promoters, generating enhanced variability of transcript levels. Destabilization of target programs shifts leukemia cell fate out of self-renewal into differentiation. We propose that control of transcriptional variability is central to leukemia stem-like cell propagation, and establish a paradigm exploitable in different tumors and distinct stages of cancer evolution.
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Affiliation(s)
- Ana Filipa Domingues
- Department of HaematologyUniversity of Cambridge, NHS-BT Blood Donor CentreCambridgeUnited Kingdom
| | - Rashmi Kulkarni
- Department of HaematologyUniversity of Cambridge, NHS-BT Blood Donor CentreCambridgeUnited Kingdom
| | - George Giotopoulos
- Department of HaematologyUniversity of Cambridge, Cambridge Institute for Medical ResearchCambridgeUnited Kingdom
- Wellcome Trust-Medical Research Council Cambridge Stem Cell InstituteCambridgeUnited Kingdom
| | - Shikha Gupta
- Department of HaematologyUniversity of Cambridge, NHS-BT Blood Donor CentreCambridgeUnited Kingdom
- Department of GeneticsUniversity of CambridgeCambridgeUnited Kingdom
| | - Laura Vinnenberg
- Department of HaematologyUniversity of Cambridge, NHS-BT Blood Donor CentreCambridgeUnited Kingdom
| | - Liliana Arede
- Department of HaematologyUniversity of Cambridge, NHS-BT Blood Donor CentreCambridgeUnited Kingdom
- Department of GeneticsUniversity of CambridgeCambridgeUnited Kingdom
| | - Elena Foerner
- Department of HaematologyUniversity of Cambridge, NHS-BT Blood Donor CentreCambridgeUnited Kingdom
| | - Mitra Khalili
- Department of HaematologyUniversity of Cambridge, NHS-BT Blood Donor CentreCambridgeUnited Kingdom
- Department of Medical Genetics and Molecular Medicine, School of MedicineZanjan University of Medical Sciences (ZUMS)ZanjanIslamic Republic of Iran
| | - Rita Romano Adao
- Department of HaematologyUniversity of Cambridge, NHS-BT Blood Donor CentreCambridgeUnited Kingdom
| | - Ayona Johns
- Division of Biosciences, College of Health and Life SciencesBrunel University LondonUxbridgeUnited Kingdom
| | - Shengjiang Tan
- Department of HaematologyUniversity of Cambridge, Cambridge Institute for Medical ResearchCambridgeUnited Kingdom
| | - Keti Zeka
- Department of HaematologyUniversity of Cambridge, NHS-BT Blood Donor CentreCambridgeUnited Kingdom
- Department of GeneticsUniversity of CambridgeCambridgeUnited Kingdom
| | - Brian J Huntly
- Department of HaematologyUniversity of Cambridge, Cambridge Institute for Medical ResearchCambridgeUnited Kingdom
- Wellcome Trust-Medical Research Council Cambridge Stem Cell InstituteCambridgeUnited Kingdom
| | - Sudhakaran Prabakaran
- Department of GeneticsUniversity of CambridgeCambridgeUnited Kingdom
- Department of BiologyIISERPuneIndia
| | - Cristina Pina
- Department of GeneticsUniversity of CambridgeCambridgeUnited Kingdom
- Division of Biosciences, College of Health and Life SciencesBrunel University LondonUxbridgeUnited Kingdom
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