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Peruzzo R, Mattarei A, Azzolini M, Becker-Flegler KA, Romio M, Rigoni G, Carrer A, Biasutto L, Parrasia S, Kadow S, Managò A, Urbani A, Rossa A, Semenzato G, Soriano ME, Trentin L, Ahmad S, Edwards M, Gulbins E, Paradisi C, Zoratti M, Leanza L, Szabò I. Corrigendum to "Insight into the mechanism of cytotoxicity of membrane-permeant psoralenic Kv1.3 channel inhibitors by chemical dissection of a novel member of the family" [Redox Biol. 37 (2020 Sep 6) 101705-101721]. Redox Biol 2021; 45:102036. [PMID: 34210643 PMCID: PMC8270548 DOI: 10.1016/j.redox.2021.102036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Affiliation(s)
| | - Andrea Mattarei
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, Italy
| | | | | | - Matteo Romio
- Department of Chemical Sciences, University of Padua, Italy
| | | | - Andrea Carrer
- Department of Biology, University of Padua, Italy; Department of Biomedical Sciences, University of Padua, Italy
| | - Lucia Biasutto
- Department of Biomedical Sciences, University of Padua, Italy; CNR Institute of Neuroscience, Padua, Italy
| | - Sofia Parrasia
- Department of Biomedical Sciences, University of Padua, Italy
| | - Stephanie Kadow
- Department of Molecular Biology, University of Duisburg-Essen, Germany
| | | | - Andrea Urbani
- Department of Biology, University of Padua, Italy; Department of Biomedical Sciences, University of Padua, Italy
| | - Andrea Rossa
- Department of Chemical Sciences, University of Padua, Italy
| | | | | | | | - Syed Ahmad
- Department of Surgery, Medical School, University of Cincinnati, USA
| | - Michael Edwards
- Department of Surgery, Medical School, University of Cincinnati, USA
| | - Erich Gulbins
- Department of Molecular Biology, University of Duisburg-Essen, Germany
| | | | - Mario Zoratti
- Department of Biomedical Sciences, University of Padua, Italy; CNR Institute of Neuroscience, Padua, Italy
| | - Luigi Leanza
- Department of Biology, University of Padua, Italy
| | - Ildikò Szabò
- Department of Biology, University of Padua, Italy; CNR Institute of Neuroscience, Padua, Italy.
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Peruzzo R, Mattarei A, Azzolini M, Becker-Flegler KA, Romio M, Rigoni G, Carrer A, Biasutto L, Parrasia S, Kadow S, Managò A, Urbani A, Rossa A, Semenzato G, Soriano ME, Trentin L, Ahmad S, Edwards M, Gulbins E, Paradisi C, Zoratti M, Leanza L, Szabò I. Insight into the mechanism of cytotoxicity of membrane-permeant psoralenic Kv1.3 channel inhibitors by chemical dissection of a novel member of the family. Redox Biol 2020; 37:101705. [PMID: 33007503 PMCID: PMC7527709 DOI: 10.1016/j.redox.2020.101705] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [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: 06/17/2020] [Revised: 08/14/2020] [Accepted: 08/25/2020] [Indexed: 02/06/2023] Open
Abstract
The potassium channel Kv1.3, involved in several important pathologies, is the target of a family of psoralen-based drugs whose mechanism of action is not fully understood. Here we provide evidence for a physical interaction of the mitochondria-located Kv1.3 (mtKv1.3) and Complex I of the respiratory chain and show that this proximity underlies the death-inducing ability of psoralenic Kv1.3 inhibitors. The effects of PAP-1-MHEG (PAP-1, a Kv1.3 inhibitor, with six monomeric ethylene glycol units attached to the phenyl ring of PAP-1), a more soluble novel derivative of PAP-1 and of its various portions on mitochondrial physiology indicate that the psoralenic moiety of PAP-1 bound to mtKv1.3 facilitates the diversion of electrons from Complex I to molecular oxygen. The resulting massive production of toxic Reactive Oxygen Species leads to death of cancer cells expressing Kv1.3. In vivo, PAP-1-MHEG significantly decreased melanoma volume. In summary, PAP-1-MHEG offers insights into the mechanisms of cytotoxicity of this family of compounds and may represent a valuable clinical tool. The mitochondrial channel mitoKv1.3 is a promising pharmacological target. MitoKv1.3 interacts with Complex I of the respiratory chain. Psoralenic inhibitors of Kv1.3 facilitate the diversion of e− from complex I to O2. A novel psoralenic Kv1.3 inhibitor with increased solubility reduces melanoma volume.
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Affiliation(s)
| | - Andrea Mattarei
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, Italy
| | | | | | - Matteo Romio
- Department of Chemical Sciences, University of Padua, Italy
| | | | - Andrea Carrer
- Department of Biology, University of Padua, Italy; Department of Biomedical Sciences, University of Padua, Italy
| | - Lucia Biasutto
- Department of Biomedical Sciences, University of Padua, Italy; CNR Institute of Neuroscience, Padua, Italy
| | - Sofia Parrasia
- Department of Biomedical Sciences, University of Padua, Italy
| | - Stephanie Kadow
- Department of Molecular Biology, University of Duisburg-Essen, Germany
| | | | - Andrea Urbani
- Department of Biology, University of Padua, Italy; Department of Biomedical Sciences, University of Padua, Italy
| | - Andrea Rossa
- Department of Chemical Sciences, University of Padua, Italy
| | | | | | | | - Syed Ahmad
- Department of Surgery, Medical School, University of Cincinnati, USA
| | - Michael Edwards
- Department of Surgery, Medical School, University of Cincinnati, USA
| | - Erich Gulbins
- Department of Molecular Biology, University of Duisburg-Essen, Germany
| | | | - Mario Zoratti
- Department of Biomedical Sciences, University of Padua, Italy; CNR Institute of Neuroscience, Padua, Italy
| | - Luigi Leanza
- Department of Biology, University of Padua, Italy
| | - Ildikò Szabò
- Department of Biology, University of Padua, Italy; CNR Institute of Neuroscience, Padua, Italy.
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Collenburg L, Beyersdorf N, Wiese T, Arenz C, Saied EM, Becker-Flegler KA, Schneider-Schaulies S, Avota E. The Activity of the Neutral Sphingomyelinase Is Important in T Cell Recruitment and Directional Migration. Front Immunol 2017; 8:1007. [PMID: 28871263 PMCID: PMC5566967 DOI: 10.3389/fimmu.2017.01007] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [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: 05/29/2017] [Accepted: 08/07/2017] [Indexed: 01/13/2023] Open
Abstract
Breakdown of sphingomyelin as catalyzed by the activity of sphingomyelinases profoundly affects biophysical properties of cellular membranes which is particularly important with regard to compartmentalization of surface receptors and their signaling relay. As it is activated both upon TCR ligation and co-stimulation in a spatiotemporally controlled manner, the neutral sphingomyelinase (NSM) has proven to be important in T cell activation, where it appears to play a particularly important role in cytoskeletal reorganization and cell polarization. Because these are important parameters in directional T cell migration and motility in tissues, we analyzed the role of the NSM in these processes. Pharmacological inhibition of NSM interfered with early lymph node homing of T cells in vivo indicating that the enzyme impacts on endothelial adhesion, transendothelial migration, sensing of chemokine gradients or, at a cellular level, acquisition of a polarized phenotype. NSM inhibition reduced adhesion of T cells to TNF-α/IFN-γ activated, but not resting endothelial cells, most likely via inhibiting high-affinity LFA-1 clustering. NSM activity proved to be highly important in directional T cell motility in response to SDF1-α, indicating that their ability to sense and translate chemokine gradients might be NSM dependent. In fact, pharmacological or genetic NSM ablation interfered with T cell polarization both at an overall morphological level and redistribution of CXCR4 and pERM proteins on endothelial cells or fibronectin, as well as with F-actin polymerization in response to SDF1-α stimulation, indicating that efficient directional perception and signaling relay depend on NSM activity. Altogether, these data support a central role of the NSM in T cell recruitment and migration both under homeostatic and inflamed conditions by regulating polarized redistribution of receptors and their coupling to the cytoskeleton.
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Affiliation(s)
- Lena Collenburg
- Institute for Virology and Immunobiology, University of Würzburg, Wuerzburg, Germany
| | - Niklas Beyersdorf
- Institute for Virology and Immunobiology, University of Würzburg, Wuerzburg, Germany
| | - Teresa Wiese
- Institute for Virology and Immunobiology, University of Würzburg, Wuerzburg, Germany
| | - Christoph Arenz
- Institute for Organic and Bioorganic Chemistry, Humboldt University of Berlin, Berlin, Germany
| | - Essa M Saied
- Institute for Organic and Bioorganic Chemistry, Humboldt University of Berlin, Berlin, Germany.,Chemistry Department, Faculty of Science, Suez Canal University, Ismailia, Egypt
| | | | | | - Elita Avota
- Institute for Virology and Immunobiology, University of Würzburg, Wuerzburg, Germany
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Hajj C, Becker-Flegler KA, Haimovitz-Friedman A. Novel mechanisms of action of classical chemotherapeutic agents on sphingolipid pathways. Biol Chem 2016; 396:669-79. [PMID: 25719313 DOI: 10.1515/hsz-2014-0302] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Accepted: 02/12/2015] [Indexed: 12/15/2022]
Abstract
The prevailing mechanisms of action of traditional chemotherapeutic agents have been challenged by sphingolipid cancer research. Many studies have shown that ceramide generation in response to cytotoxic agents is central to tumor cell death. Ceramide can be generated either via hydrolysis of cell-membrane sphingomyelin by sphingomyelinases, hydrolysis of cerebrosides, or via de novo synthesis by ceramide synthases. Ceramide can act as a second messenger for apoptosis, senescence or autophagy. Inherent or acquired alterations in the sphingolipid pathway can account for resistance to the classic chemotherapeutic agents. In particular, it has been shown that activation of the acid ceramidase can lead to the formation of sphingosine 1-phosphate, which then antagonizes ceramide signaling by initiating a pro-survival signaling pathway. Furthermore, ceramide glycosylation catalyzed by glucosylceramide synthase converts ceramide to glucosylceramide, thus eliminating ceramide and consequently protecting cancer cells from apoptosis. In this review, we describe the effects of some of the most commonly used chemotherapeutic agents on ceramide generation, with a particular emphasis on strategies used to enhance the efficacy of these agents.
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