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Badenes M, Burbridge E, Oikonomidi I, Amin A, de Carvalho É, Kosack L, Mariano C, Domingos P, Faísca P, Adrain C. The ADAM17 sheddase complex regulator iTAP/Frmd8 modulates inflammation and tumor growth. Life Sci Alliance 2023; 6:e202201644. [PMID: 36720499 PMCID: PMC9889915 DOI: 10.26508/lsa.202201644] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 12/22/2022] [Accepted: 01/03/2023] [Indexed: 02/02/2023] Open
Abstract
The metalloprotease ADAM17 is a sheddase of key molecules, including TNF and epidermal growth factor receptor ligands. ADAM17 exists within an assemblage, the "sheddase complex," containing a rhomboid pseudoprotease (iRhom1 or iRhom2). iRhoms control multiple aspects of ADAM17 biology. The FERM domain-containing protein iTAP/Frmd8 is an iRhom-binding protein that prevents the precocious shunting of ADAM17 and iRhom2 to lysosomes and their consequent degradation. As pathophysiological role(s) of iTAP/Frmd8 have not been addressed, we characterized the impact of iTAP/Frmd8 loss on ADAM17-associated phenotypes in mice. We show that iTAP/Frmd8 KO mice exhibit defects in inflammatory and intestinal epithelial barrier repair functions, but not the collateral defects associated with global ADAM17 loss. Furthermore, we show that iTAP/Frmd8 regulates cancer cell growth in a cell-autonomous manner and by modulating the tumor microenvironment. Our work suggests that pharmacological intervention at the level of iTAP/Frmd8 may be beneficial to target ADAM17 activity in specific compartments during chronic inflammatory diseases or cancer, while avoiding the collateral impact on the vital functions associated with the widespread inhibition of ADAM17.
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Affiliation(s)
- Marina Badenes
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
- Faculty of Veterinary Medicine, Lusofona University, Lisbon, Portugal
- Faculty of Veterinary Nursing, Polytechnic Institute of Lusofonia, Lisbon, Portugal
| | - Emma Burbridge
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
- Patrick G Johnston Centre for Cancer Research, Queen's University, Belfast, UK
| | | | - Abdulbasit Amin
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
- Department of Physiology, Faculty of Basic Medical Sciences, University of Ilorin, Ilorin, Nigeria
| | - Érika de Carvalho
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
- Instituto de Tecnologia Química da Universidade Nova de Lisboa (ITQB-Nova), Oeiras, Portugal
| | | | | | - Pedro Domingos
- Instituto de Tecnologia Química da Universidade Nova de Lisboa (ITQB-Nova), Oeiras, Portugal
| | - Pedro Faísca
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - Colin Adrain
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
- Patrick G Johnston Centre for Cancer Research, Queen's University, Belfast, UK
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Oikonomidi I, Burbridge E, Cavadas M, Sullivan G, Collis B, Naegele H, Clancy D, Brezinova J, Hu T, Bileck A, Gerner C, Bolado A, von Kriegsheim A, Martin SJ, Steinberg F, Strisovsky K, Adrain C. iTAP, a novel iRhom interactor, controls TNF secretion by policing the stability of iRhom/TACE. eLife 2018; 7:35032. [PMID: 29897333 PMCID: PMC6042963 DOI: 10.7554/elife.35032] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [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: 01/12/2018] [Accepted: 06/10/2018] [Indexed: 12/11/2022] Open
Abstract
The apical inflammatory cytokine TNF regulates numerous important biological processes including inflammation and cell death, and drives inflammatory diseases. TNF secretion requires TACE (also called ADAM17), which cleaves TNF from its transmembrane tether. The trafficking of TACE to the cell surface, and stimulation of its proteolytic activity, depends on membrane proteins, called iRhoms. To delineate how the TNF/TACE/iRhom axis is regulated, we performed an immunoprecipitation/mass spectrometry screen to identify iRhom-binding proteins. This identified a novel protein, that we name iTAP (iRhom Tail-Associated Protein) that binds to iRhoms, enhancing the cell surface stability of iRhoms and TACE, preventing their degradation in lysosomes. Depleting iTAP in primary human macrophages profoundly impaired TNF production and tissues from iTAP KO mice exhibit a pronounced depletion in active TACE levels. Our work identifies iTAP as a physiological regulator of TNF signalling and a novel target for the control of inflammation. Inflammation forms part of the body's defense system against pathogens, but if the system becomes faulty, it can cause problems linked to inflammatory and autoimmune diseases. Immune cells coordinate their activity using specific signaling molecules called cytokines. For example, the cytokine TNF is an important trigger of inflammation and is produced at the surface of immune cells. A specific enzyme called TACE is needed to release TNF, as well as other signaling molecules, including proteins that trigger healing. Previous work revealed that TACE works with proteins called iRhoms, which regulate its activity and help TACE to reach the surface of the cell to release TNF. To find out how, Oikonomidi et al. screened human cells to see what other proteins interact with iRhoms. The results revealed a new protein named iTAP, which is required to release TNF from the surface of cells. It also protects the TACE-iRhom complex from being destroyed by the cell’s waste disposal system. When iTAP was experimentally removed in human immune cells, the cells were unable to release TNF. Instead, iRhom and TACE travelled to the cell's garbage system, the lysosome, where the proteins were destroyed. Removing the iTAP gene in mice had the same effect, and the TACE-iRhom complex was no longer found on the surface of the cell, but instead degraded in lysosomes. This suggests that in healthy cells, the iTAP protein prevents the cell from destroying this protein complex. TNF controls many beneficial processes, including fighting infection and cancer. However, when the immune system releases too many cytokines, it can lead to inflammatory diseases or even cause cancer. Specific drugs that target TNF are not always effective administered on their own, and sometimes, patients stop responding to the drugs. Since the new protein iTAP works as a switch to turn TNF release on or off, it could provide a target for the development of new treatments.
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Affiliation(s)
- Ioanna Oikonomidi
- Membrane Traffic Lab, Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - Emma Burbridge
- Membrane Traffic Lab, Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - Miguel Cavadas
- Membrane Traffic Lab, Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - Graeme Sullivan
- Molecular Cell Biology Laboratory, Department of Genetics, The Smurfit Institute, Trinity College Dublin, Dublin, Ireland
| | - Blanka Collis
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Heike Naegele
- Center for Biological Systems Analysis, Faculty of Biology, Albert Ludwigs Universitaet Freiburg, Freiburg, Germany
| | - Danielle Clancy
- Molecular Cell Biology Laboratory, Department of Genetics, The Smurfit Institute, Trinity College Dublin, Dublin, Ireland
| | - Jana Brezinova
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Tianyi Hu
- Membrane Traffic Lab, Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - Andrea Bileck
- Institut für Analytische Chemie, Universität Wien, Vienna, Austria
| | | | - Alfonso Bolado
- Edinburgh Cancer Research UK Centre, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom
| | - Alex von Kriegsheim
- Edinburgh Cancer Research UK Centre, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom
| | - Seamus J Martin
- Molecular Cell Biology Laboratory, Department of Genetics, The Smurfit Institute, Trinity College Dublin, Dublin, Ireland
| | - Florian Steinberg
- Center for Biological Systems Analysis, Faculty of Biology, Albert Ludwigs Universitaet Freiburg, Freiburg, Germany
| | - Kvido Strisovsky
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Colin Adrain
- Membrane Traffic Lab, Instituto Gulbenkian de Ciência, Oeiras, Portugal
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