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Gubič Š, Montalbano A, Sala C, Becchetti A, Hendrickx LA, Van Theemsche KM, Pinheiro-Junior EL, Altadonna GC, Peigneur S, Ilaš J, Labro AJ, Pardo LA, Tytgat J, Tomašič T, Arcangeli A, Peterlin Mašič L. Immunosuppressive effects of new thiophene-based K V1.3 inhibitors. Eur J Med Chem 2023; 259:115561. [PMID: 37454520 DOI: 10.1016/j.ejmech.2023.115561] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 06/08/2023] [Accepted: 06/08/2023] [Indexed: 07/18/2023]
Abstract
Voltage-gated potassium channel KV1.3 inhibitors have been shown to be effective in preventing T-cell proliferation and activation by affecting intracellular Ca2+ homeostasis. Here, we present the structure-activity relationship, KV1.3 inhibition, and immunosuppressive effects of new thiophene-based KV1.3 inhibitors with nanomolar potency on K+ current in T-lymphocytes and KV1.3 inhibition on Ltk- cells. The new KV1.3 inhibitor trans-18 inhibited KV1.3 -mediated current in phytohemagglutinin (PHA)-activated T-lymphocytes with an IC50 value of 26.1 nM and in mammalian Ltk- cells with an IC50 value of 230 nM. The KV1.3 inhibitor trans-18 also had nanomolar potency against KV1.3 in Xenopus laevis oocytes (IC50 = 136 nM). The novel thiophene-based KV1.3 inhibitors impaired intracellular Ca2+ signaling as well as T-cell activation, proliferation, and colony formation.
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Affiliation(s)
- Špela Gubič
- University of Ljubljana, Faculty of Pharmacy, Department of Pharmaceutical Chemistry, Aškerčeva cesta 7, 1000, Ljubljana, Slovenia
| | - Alberto Montalbano
- University of Florence, Department of Experimental and Clinical Medicine, I-50134, Florence, Italy
| | - Cesare Sala
- University of Florence, Department of Experimental and Clinical Medicine, I-50134, Florence, Italy
| | - Andrea Becchetti
- University of Milano-Bicocca, Department of Biotechnology and Biosciences, Piazza della Scienza 2, I-20126, Milano, Italy
| | - Louise Antonia Hendrickx
- University of Leuven, Toxicology and Pharmacology, Campus Gasthuisberg, Onderwijs en Navorsing 2, Herestraat 49, PO Box 922, 3000, Leuven, Belgium
| | - Kenny M Van Theemsche
- University of Antwerp, Department of Biomedical Sciences, Campus Drie Eiken, Universiteisplein 1, 2610, Wilrijk, Belgium; Ghent University, Department of Basic and Applied Medical Sciences, Corneel Heymanslaan 10, 9000, Ghent, Belgium
| | - Ernesto Lopes Pinheiro-Junior
- University of Leuven, Toxicology and Pharmacology, Campus Gasthuisberg, Onderwijs en Navorsing 2, Herestraat 49, PO Box 922, 3000, Leuven, Belgium
| | | | - Steve Peigneur
- University of Leuven, Toxicology and Pharmacology, Campus Gasthuisberg, Onderwijs en Navorsing 2, Herestraat 49, PO Box 922, 3000, Leuven, Belgium
| | - Janez Ilaš
- University of Ljubljana, Faculty of Pharmacy, Department of Pharmaceutical Chemistry, Aškerčeva cesta 7, 1000, Ljubljana, Slovenia
| | - Alain J Labro
- Ghent University, Department of Basic and Applied Medical Sciences, Corneel Heymanslaan 10, 9000, Ghent, Belgium
| | - Luis A Pardo
- Max-Planck Institute for Experimental Medicine, AG Oncophysiology, Hermann-Rein-Str. 3, 37075, Göttingen, Germany
| | - Jan Tytgat
- University of Leuven, Toxicology and Pharmacology, Campus Gasthuisberg, Onderwijs en Navorsing 2, Herestraat 49, PO Box 922, 3000, Leuven, Belgium
| | - Tihomir Tomašič
- University of Ljubljana, Faculty of Pharmacy, Department of Pharmaceutical Chemistry, Aškerčeva cesta 7, 1000, Ljubljana, Slovenia
| | - Annarosa Arcangeli
- University of Florence, Department of Experimental and Clinical Medicine, I-50134, Florence, Italy.
| | - Lucija Peterlin Mašič
- University of Ljubljana, Faculty of Pharmacy, Department of Pharmaceutical Chemistry, Aškerčeva cesta 7, 1000, Ljubljana, Slovenia.
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Gubič Š, Hendrickx LA, Shi X, Toplak Ž, Možina Š, Theemsche KMV, Pinheiro-Junior EL, Peigneur S, Labro AJ, Pardo LA, Tytgat J, Tomašič T, Peterlin Mašič L. Correction: Gubič et al. Design of New Potent and Selective Thiophene-Based K V1.3 Inhibitors and Their Potential for Anticancer Activity. Cancers 2022, 14, 2595. Cancers (Basel) 2023; 15:cancers15112925. [PMID: 37297027 DOI: 10.3390/cancers15112925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 05/10/2023] [Indexed: 06/12/2023] Open
Abstract
In the original publication [...].
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Affiliation(s)
- Špela Gubič
- Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, 1000 Ljubljana, Slovenia
| | - Louise Antonia Hendrickx
- Campus Gasthuisberg, University of Leuven, Toxicology and Pharmacology, Onderwijs en Navorsing 2, Herestraat 49, 3000 Leuven, Belgium
| | - Xiaoyi Shi
- AG Oncophysiology, Max-Planck Institute for Multidisciplinary Sciences, Hermann-Rein-Str. 3, 37075 Göttingen, Germany
| | - Žan Toplak
- Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, 1000 Ljubljana, Slovenia
| | - Štefan Možina
- Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, 1000 Ljubljana, Slovenia
| | - Kenny M Van Theemsche
- Laboratory for Molecular, Cellular and Network Excitability, Department of Biomedical Sciences, University of Antwerp, 2610 Wilrijk, Belgium
- Department of Basic and Applied Medical Sciences, Ghent University, Corneel Heymanslaan 10 (Entrance 36), 9000 Ghent, Belgium
| | - Ernesto Lopes Pinheiro-Junior
- Campus Gasthuisberg, University of Leuven, Toxicology and Pharmacology, Onderwijs en Navorsing 2, Herestraat 49, 3000 Leuven, Belgium
| | - Steve Peigneur
- Campus Gasthuisberg, University of Leuven, Toxicology and Pharmacology, Onderwijs en Navorsing 2, Herestraat 49, 3000 Leuven, Belgium
| | - Alain J Labro
- Laboratory for Molecular, Cellular and Network Excitability, Department of Biomedical Sciences, University of Antwerp, 2610 Wilrijk, Belgium
- Department of Basic and Applied Medical Sciences, Ghent University, Corneel Heymanslaan 10 (Entrance 36), 9000 Ghent, Belgium
| | - Luis A Pardo
- AG Oncophysiology, Max-Planck Institute for Multidisciplinary Sciences, Hermann-Rein-Str. 3, 37075 Göttingen, Germany
| | - Jan Tytgat
- Campus Gasthuisberg, University of Leuven, Toxicology and Pharmacology, Onderwijs en Navorsing 2, Herestraat 49, 3000 Leuven, Belgium
| | - Tihomir Tomašič
- Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, 1000 Ljubljana, Slovenia
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Van Theemsche KM, Heymans JG, Popovic NZ, Martinez-Morales E, Snyders DJ, Labro AJ. Offsetting Voltage-Dependent Kv1.5 Channel Opening Through Charged Residue Substitutions on Top of the First Transmembrane Segment. Bioelectricity 2022. [DOI: 10.1089/bioe.2022.0005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Kenny M. Van Theemsche
- Department of Basic and Applied Medical Sciences, Faculty of Medicine, Ghent University, Ghent, Belgium
- Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Joni G. Heymans
- Department of Basic and Applied Medical Sciences, Faculty of Medicine, Ghent University, Ghent, Belgium
| | - Nikola Z. Popovic
- Department of Basic and Applied Medical Sciences, Faculty of Medicine, Ghent University, Ghent, Belgium
| | | | - Dirk J. Snyders
- Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Alain J. Labro
- Department of Basic and Applied Medical Sciences, Faculty of Medicine, Ghent University, Ghent, Belgium
- Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
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Arora R, Van Theemsche KM, Van Remoortel S, Snyders DJ, Labro AJ, Timmermans JP. Constitutive, Basal, and β-Alanine-Mediated Activation of the Human Mas-Related G Protein-Coupled Receptor D Induces Release of the Inflammatory Cytokine IL-6 and Is Dependent on NF-κB Signaling. Int J Mol Sci 2021; 22:ijms222413254. [PMID: 34948051 PMCID: PMC8703779 DOI: 10.3390/ijms222413254] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 12/04/2020] [Revised: 12/03/2021] [Accepted: 12/04/2021] [Indexed: 12/14/2022] Open
Abstract
G protein-coupled receptors (GPCRs) have emerged as key players in regulating (patho)physiological processes, including inflammation. Members of the Mas-related G protein coupled receptors (MRGPRs), a subfamily of GPCRs, are largely expressed by sensory neurons and known to modulate itch and pain. Several members of MRGPRs are also expressed in mast cells, macrophages, and in cardiovascular tissue, linking them to pseudo-allergic drug reactions and suggesting a pivotal role in the cardiovascular system. However, involvement of the human Mas-related G-protein coupled receptor D (MRGPRD) in the regulation of the inflammatory mediator interleukin 6 (IL-6) has not been demonstrated to date. By stimulating human MRGPRD-expressing HeLa cells with the agonist β-alanine, we observed a release of IL-6. β-alanine-induced signaling through MRGPRD was investigated further by probing downstream signaling effectors along the Gαq/Phospholipase C (PLC) pathway, which results in an IkB kinases (IKK)-mediated canonical activation of nuclear factor kappa-B (NF-κB) and stimulation of IL-6 release. This IL-6 release could be blocked by a Gαq inhibitor (YM-254890), an IKK complex inhibitor (IKK-16), and partly by a PLC inhibitor (U-73122). Additionally, we investigated the constitutive (ligand-independent) and basal activity of MRGPRD and concluded that the observed basal activity of MRGPRD is dependent on the presence of fetal bovine serum (FBS) in the culture medium. Consequently, the dynamic range for IL-6 detection as an assay for β-alanine-mediated activation of MRGPRD is substantially increased by culturing the cells in FBS free medium before treatment. Overall, the observation that MRGPRD mediates the release of IL-6 in an in vitro system, hints at a role as an inflammatory mediator and supports the notion that IL-6 can be used as a marker for MRGPRD activation in an in vitro drug screening assay.
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Affiliation(s)
- Rohit Arora
- Laboratory of Cell Biology and Histology, Department of Veterinary Sciences, University of Antwerp, 2610 Wilrijk, Belgium; (R.A.); (S.V.R.)
- Laboratory for Molecular, Cellular and Network Excitability, Department of Biomedical Sciences, University of Antwerp, 2610 Wilrijk, Belgium; (K.M.V.T.); (D.J.S.)
| | - Kenny M. Van Theemsche
- Laboratory for Molecular, Cellular and Network Excitability, Department of Biomedical Sciences, University of Antwerp, 2610 Wilrijk, Belgium; (K.M.V.T.); (D.J.S.)
| | - Samuel Van Remoortel
- Laboratory of Cell Biology and Histology, Department of Veterinary Sciences, University of Antwerp, 2610 Wilrijk, Belgium; (R.A.); (S.V.R.)
| | - Dirk J. Snyders
- Laboratory for Molecular, Cellular and Network Excitability, Department of Biomedical Sciences, University of Antwerp, 2610 Wilrijk, Belgium; (K.M.V.T.); (D.J.S.)
| | - Alain J. Labro
- Laboratory for Molecular, Cellular and Network Excitability, Department of Biomedical Sciences, University of Antwerp, 2610 Wilrijk, Belgium; (K.M.V.T.); (D.J.S.)
- Department of Basic and Applied Medical Sciences, Ghent University, 9000 Ghent, Belgium
- Correspondence: (A.J.L.); (J.-P.T.); Tel.: +32-9-3320034 (A.J.L.); +32-3-2653327 (J.-P.T.)
| | - Jean-Pierre Timmermans
- Laboratory of Cell Biology and Histology, Department of Veterinary Sciences, University of Antwerp, 2610 Wilrijk, Belgium; (R.A.); (S.V.R.)
- Correspondence: (A.J.L.); (J.-P.T.); Tel.: +32-9-3320034 (A.J.L.); +32-3-2653327 (J.-P.T.)
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Van Theemsche KM, Van de Sande DV, Snyders DJ, Labro AJ. Hydrophobic Drug/Toxin Binding Sites in Voltage-Dependent K + and Na + Channels. Front Pharmacol 2020; 11:735. [PMID: 32499709 PMCID: PMC7243439 DOI: 10.3389/fphar.2020.00735] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 05/04/2020] [Indexed: 12/26/2022] Open
Abstract
In the Nav channel family the lipophilic drugs/toxins binding sites and the presence of fenestrations in the channel pore wall are well defined and categorized. No such classification exists in the much larger Kv channel family, although certain lipophilic compounds seem to deviate from binding to well-known hydrophilic binding sites. By mapping different compound binding sites onto 3D structures of Kv channels, there appear to be three distinct lipid-exposed binding sites preserved in Kv channels: the front and back side of the pore domain, and S2-S3/S3-S4 clefts. One or a combination of these sites is most likely the orthologous equivalent of neurotoxin site 5 in Nav channels. This review describes the different lipophilic binding sites and location of pore wall fenestrations within the Kv channel family and compares it to the knowledge of Nav channels.
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Affiliation(s)
- Kenny M Van Theemsche
- Laboratory of Molecular, Cellular, and Network Excitability, University of Antwerp, Antwerp, Belgium
| | - Dieter V Van de Sande
- Laboratory of Molecular, Cellular, and Network Excitability, University of Antwerp, Antwerp, Belgium
| | - Dirk J Snyders
- Laboratory of Molecular, Cellular, and Network Excitability, University of Antwerp, Antwerp, Belgium
| | - Alain J Labro
- Laboratory of Molecular, Cellular, and Network Excitability, University of Antwerp, Antwerp, Belgium
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