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Caon E, Martins M, Hodgetts H, Blanken L, Vilia MG, Levi A, Thanapirom K, Al-Akkad W, Abu-Hanna J, Baselli G, Hall AR, Luong TV, Taanman JW, Vacca M, Valenti L, Romeo S, Mazza G, Pinzani M, Rombouts K. Exploring the impact of the PNPLA3 I148M variant on primary human hepatic stellate cells using 3D extracellular matrix models. J Hepatol 2024:S0168-8278(24)00110-7. [PMID: 38365182 DOI: 10.1016/j.jhep.2024.01.032] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 01/24/2024] [Accepted: 01/27/2024] [Indexed: 02/18/2024]
Abstract
BACKGROUND & AIMS The PNPLA3 rs738409 C>G (encoding for I148M) variant is a risk locus for the fibrogenic progression of chronic liver diseases, a process driven by hepatic stellate cells (HSCs). We investigated how the PNPLA3 I148M variant affects HSC biology using transcriptomic data and validated findings in 3D-culture models. METHODS RNA sequencing was performed on 2D-cultured primary human HSCs and liver biopsies of individuals with obesity, genotyped for the PNPLA3 I148M variant. Data were validated in wild-type (WT) or PNPLA3 I148M variant-carrying HSCs cultured on 3D extracellular matrix (ECM) scaffolds from human healthy and cirrhotic livers, with/without TGFB1 or cytosporone B (Csn-B) treatment. RESULTS Transcriptomic analyses of liver biopsies and HSCs highlighted shared PNPLA3 I148M-driven dysregulated pathways related to mitochondrial function, antioxidant response, ECM remodelling and TGFB1 signalling. Analogous pathways were dysregulated in WT/PNPLA3-I148M HSCs cultured in 3D liver scaffolds. Mitochondrial dysfunction in PNPLA3-I148M cells was linked to respiratory chain complex IV insufficiency. Antioxidant capacity was lower in PNPLA3-I148M HSCs, while reactive oxygen species secretion was increased in PNPLA3-I148M HSCs and higher in bioengineered cirrhotic vs. healthy scaffolds. TGFB1 signalling followed the same trend. In PNPLA3-I148M cells, expression and activation of the endogenous TGFB1 inhibitor NR4A1 were decreased: treatment with the Csn-B agonist increased total NR4A1 in HSCs cultured in healthy but not in cirrhotic 3D scaffolds. NR4A1 regulation by TGFB1/Csn-B was linked to Akt signalling in PNPLA3-WT HSCs and to Erk signalling in PNPLA3-I148M HSCs. CONCLUSION HSCs carrying the PNPLA3 I148M variant have impaired mitochondrial function, antioxidant responses, and increased TGFB1 signalling, which dampens antifibrotic NR4A1 activity. These features are exacerbated by cirrhotic ECM, highlighting the dual impact of the PNPLA3 I148M variant and the fibrotic microenvironment in progressive chronic liver diseases. IMPACT AND IMPLICATIONS Hepatic stellate cells (HSCs) play a key role in the fibrogenic process associated with chronic liver disease. The PNPLA3 genetic mutation has been linked with increased risk of fibrogenesis, but its role in HSCs requires further investigation. Here, by using comparative transcriptomics and a novel 3D in vitro model, we demonstrate the impact of the PNPLA3 genetic mutation on primary human HSCs' behaviour, and we show that it affects the cell's mitochondrial function and antioxidant response, as well as the antifibrotic gene NR4A1. Our publicly available transcriptomic data, 3D platform and our findings on NR4A1 could facilitate the discovery of targets to develop more effective treatments for chronic liver diseases.
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Affiliation(s)
- Elisabetta Caon
- Regenerative Medicine and Fibrosis Group, Institute for Liver and Digestive Health, University College London, Royal Free Campus, London, UK
| | - Maria Martins
- Regenerative Medicine and Fibrosis Group, Institute for Liver and Digestive Health, University College London, Royal Free Campus, London, UK
| | - Harry Hodgetts
- Regenerative Medicine and Fibrosis Group, Institute for Liver and Digestive Health, University College London, Royal Free Campus, London, UK
| | - Lieke Blanken
- Regenerative Medicine and Fibrosis Group, Institute for Liver and Digestive Health, University College London, Royal Free Campus, London, UK
| | - Maria Giovanna Vilia
- Regenerative Medicine and Fibrosis Group, Institute for Liver and Digestive Health, University College London, Royal Free Campus, London, UK
| | - Ana Levi
- Regenerative Medicine and Fibrosis Group, Institute for Liver and Digestive Health, University College London, Royal Free Campus, London, UK
| | - Kessarin Thanapirom
- Regenerative Medicine and Fibrosis Group, Institute for Liver and Digestive Health, University College London, Royal Free Campus, London, UK
| | - Walid Al-Akkad
- Regenerative Medicine and Fibrosis Group, Institute for Liver and Digestive Health, University College London, Royal Free Campus, London, UK
| | - Jeries Abu-Hanna
- Research Department of Surgical Biotechnology, Division of Surgery and Interventional Science, University College London, London, UK
| | - Guido Baselli
- Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Milan, Italy
| | - Andrew R Hall
- Sheila Sherlock Liver Centre, Royal Free London NHS Foundation Trust, London, UK; Department of Cellular Pathology, Royal Free London NHS Foundation Trust, London, UK
| | - Tu Vinh Luong
- Sheila Sherlock Liver Centre, Royal Free London NHS Foundation Trust, London, UK; Department of Cellular Pathology, Royal Free London NHS Foundation Trust, London, UK
| | - Jan-Willem Taanman
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, University College London, London UK
| | - Michele Vacca
- Laboratory of Hepatic Metabolism and NAFLD, Roger Williams Institute of Hepatology, London, UK; Clinica Medica "Frugoni", Interdisciplinary Department of Medicine, University of Bari "Aldo Moro", Bari, Italy
| | - Luca Valenti
- Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Milan, Italy; Precision Medicine, Biological Resource Center, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Stefano Romeo
- Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, Wallenberg Laboratory, University of Gothenburg, Gothenburg, Sweden
| | - Giuseppe Mazza
- Regenerative Medicine and Fibrosis Group, Institute for Liver and Digestive Health, University College London, Royal Free Campus, London, UK
| | - Massimo Pinzani
- Regenerative Medicine and Fibrosis Group, Institute for Liver and Digestive Health, University College London, Royal Free Campus, London, UK
| | - Krista Rombouts
- Regenerative Medicine and Fibrosis Group, Institute for Liver and Digestive Health, University College London, Royal Free Campus, London, UK.
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Mantione ME, Sana I, Vilia MG, Riba M, Doglioni C, Larcher A, Capitanio U, Muzio M. SIGIRR Downregulation and Interleukin-1 Signaling Intrinsic to Renal Cell Carcinoma. Front Oncol 2022; 12:894413. [PMID: 35814450 PMCID: PMC9256934 DOI: 10.3389/fonc.2022.894413] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Accepted: 05/17/2022] [Indexed: 11/20/2022] Open
Abstract
Renal cell carcinoma is highly inflamed, and tumor cells are embedded into a microenvironment enriched with IL1. While inflammatory pathways are well characterized in the immune system, less is known about these same pathways in epithelial cells; it is unclear if and how innate immune signals directly impact on cancer cells, and if we could we manipulate these for therapeutic purposes. To address these questions, we first focused on the inflammatory receptors belonging to the IL1- and Toll-like receptor family including negative regulators in a small cohort of 12 clear cell RCC (ccRCC) patients’ samples as compared to their coupled adjacent normal tissues. Our data demonstrated that renal epithelial cancer cells showed a specific and distinctive pattern of inflammatory receptor expression marked by a consistent downregulation of the inhibitory receptor SIGIRR mRNA. This repression was confirmed at the protein level in both cancer cell lines and primary tissues. When we analyzed in silico data of different kidney cancer histotypes, we identified the clear cell subtype as the one where SIGIRR was mostly downregulated; nonetheless, papillary and chromophobe tumor types also showed low levels as compared to their normal counterpart. RNA-sequencing analysis demonstrated that IL1 stimulation of the ccRCC cell line A498 triggered an intrinsic signature of inflammatory pathway activation characterized by the induction of distinct “pro-tumor” genes including several chemokines, the autocrine growth factor IL6, the atypical co-transcription factor NFKBIZ, and the checkpoint inhibitor PD-L1. When we looked for the macroareas most represented among the differentially expressed genes, additional clusters emerged including pathways involved in cell differentiation, angiogenesis, and wound healing. To note, SIGIRR overexpression in A498 cells dampened IL1 signaling as assessed by a reduced induction of NFKBIZ. Our results suggest that SIGIRR downregulation unleashes IL1 signaling intrinsic to tumor cells and that manipulating this pathway may be beneficial in ccRCC.
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Affiliation(s)
- Maria Elena Mantione
- Cell Signaling Unit, Division of Experimental Oncology, San Raffaele Hospital Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Milano, Italy
| | - Ilenia Sana
- Cell Signaling Unit, Division of Experimental Oncology, San Raffaele Hospital Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Milano, Italy
| | - Maria Giovanna Vilia
- Cell Signaling Unit, Division of Experimental Oncology, San Raffaele Hospital Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Milano, Italy
| | - Michela Riba
- Center for Omics Sciences, San Raffaele Hospital Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Milano, Italy
| | - Claudio Doglioni
- Pathology Unit, San Raffaele Hospital Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Milano, Italy
| | - Alessandro Larcher
- Department of Urology, San Raffaele Scientific Institute, Milan, Italy; Division of Experimental Oncology/Unit of Urology, Urological Research Institute (URI), Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) San Raffaele Hospital, Milan, Italy
| | - Umberto Capitanio
- Department of Urology, San Raffaele Scientific Institute, Milan, Italy; Division of Experimental Oncology/Unit of Urology, Urological Research Institute (URI), Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) San Raffaele Hospital, Milan, Italy
| | - Marta Muzio
- Cell Signaling Unit, Division of Experimental Oncology, San Raffaele Hospital Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Milano, Italy
- *Correspondence: Marta Muzio,
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Thanapirom K, Caon E, Papatheodoridi M, Frenguelli L, Al-Akkad W, Zhenzhen Z, Vilia MG, Pinzani M, Mazza G, Rombouts K. Optimization and Validation of a Novel Three-Dimensional Co-Culture System in Decellularized Human Liver Scaffold for the Study of Liver Fibrosis and Cancer. Cancers (Basel) 2021; 13:cancers13194936. [PMID: 34638417 PMCID: PMC8508071 DOI: 10.3390/cancers13194936] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [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: 08/06/2021] [Revised: 09/18/2021] [Accepted: 09/27/2021] [Indexed: 12/12/2022] Open
Abstract
Simple Summary This study aims to overcome the current methodological limitations in discovering new therapeutic targets. Therefore, we optimized and validated a co-culture system using decellularized human liver three-dimensional (3D) scaffolds obtained from healthy and cirrhotic human livers for anti-fibrotic and anti-cancer dual drug screening. Both platforms mimic the naturally healthy and physio-pathological microenvironment and are able to recapitulate the key cellular and molecular events leading to liver fibrogenesis and cancer. This study demonstrates the differences between single versus co-cultures and the usage of human-derived liver 3D ECM scaffolds from healthy and cirrhotic livers. As lead compounds, we used Sorafenib and Regorafenib, first- and second-line drugs, and identified two different drug-induced mechanisms depending on the 3D ECM microenvironment. The 3D ECM scaffolds may represent innovative platforms for disease modeling, biomarker discovery, and drug testing in fibrosis and primary cancer. Abstract The introduction of new preclinical models for in vitro drug discovery and testing based on 3D tissue-specific extracellular matrix (ECM) is very much awaited. This study was aimed at developing and validating a co-culture model using decellularized human liver 3D ECM scaffolds as a platform for anti-fibrotic and anti-cancer drug testing. Decellularized 3D scaffolds obtained from healthy and cirrhotic human livers were bioengineered with LX2 and HEPG2 as single and co-cultures for up to 13 days and validated as a new drug-testing platform. Pro-fibrogenic markers and cancer phenotypic gene/protein expression and secretion were differently affected when single and co-cultures were exposed to TGF-β1 with specific ECM-dependent effects. The anti-fibrotic efficacy of Sorafenib significantly reduced TGF-β1-induced pro-fibrogenic effects, which coincided with a downregulation of STAT3 phosphorylation. The anti-cancer efficacy of Regorafenib was significantly reduced in 3D bioengineered cells when compared to 2D cultures and dose-dependently associated with cell apoptosis by cleaved PARP-1 activation and P-STAT3 inhibition. Regorafenib reversed TGF-β1-induced P-STAT3 and SHP-1 through induction of epithelial mesenchymal marker E-cadherin and downregulation of vimentin protein expression in both co-cultures engrafting healthy and cirrhotic 3D scaffolds. In their complex, the results of the study suggest that this newly proposed 3D co-culture platform is able to reproduce the natural physio-pathological microenvironment and could be employed for anti-fibrotic and anti-HCC drug screening.
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Affiliation(s)
- Kessarin Thanapirom
- Regenerative Medicine and Fibrosis Group, Institute for Liver and Digestive Health, University College London, Royal Free Campus, London NW3 2PF, UK; (K.T.); (E.C.); (M.P.); (L.F.); (W.A.-A.); (Z.Z.); (M.G.V.); (M.P.); (G.M.)
- Division of Gastroenterology, Department of Medicine, Liver Fibrosis and Cirrhosis Research Unit, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok 10330, Thailand
| | - Elisabetta Caon
- Regenerative Medicine and Fibrosis Group, Institute for Liver and Digestive Health, University College London, Royal Free Campus, London NW3 2PF, UK; (K.T.); (E.C.); (M.P.); (L.F.); (W.A.-A.); (Z.Z.); (M.G.V.); (M.P.); (G.M.)
| | - Margarita Papatheodoridi
- Regenerative Medicine and Fibrosis Group, Institute for Liver and Digestive Health, University College London, Royal Free Campus, London NW3 2PF, UK; (K.T.); (E.C.); (M.P.); (L.F.); (W.A.-A.); (Z.Z.); (M.G.V.); (M.P.); (G.M.)
| | - Luca Frenguelli
- Regenerative Medicine and Fibrosis Group, Institute for Liver and Digestive Health, University College London, Royal Free Campus, London NW3 2PF, UK; (K.T.); (E.C.); (M.P.); (L.F.); (W.A.-A.); (Z.Z.); (M.G.V.); (M.P.); (G.M.)
| | - Walid Al-Akkad
- Regenerative Medicine and Fibrosis Group, Institute for Liver and Digestive Health, University College London, Royal Free Campus, London NW3 2PF, UK; (K.T.); (E.C.); (M.P.); (L.F.); (W.A.-A.); (Z.Z.); (M.G.V.); (M.P.); (G.M.)
| | - Zhang Zhenzhen
- Regenerative Medicine and Fibrosis Group, Institute for Liver and Digestive Health, University College London, Royal Free Campus, London NW3 2PF, UK; (K.T.); (E.C.); (M.P.); (L.F.); (W.A.-A.); (Z.Z.); (M.G.V.); (M.P.); (G.M.)
| | - Maria Giovanna Vilia
- Regenerative Medicine and Fibrosis Group, Institute for Liver and Digestive Health, University College London, Royal Free Campus, London NW3 2PF, UK; (K.T.); (E.C.); (M.P.); (L.F.); (W.A.-A.); (Z.Z.); (M.G.V.); (M.P.); (G.M.)
| | - Massimo Pinzani
- Regenerative Medicine and Fibrosis Group, Institute for Liver and Digestive Health, University College London, Royal Free Campus, London NW3 2PF, UK; (K.T.); (E.C.); (M.P.); (L.F.); (W.A.-A.); (Z.Z.); (M.G.V.); (M.P.); (G.M.)
- Sheila Sherlock Liver Centre, Royal Free Hospital, London NW3 2QG, UK
| | - Giuseppe Mazza
- Regenerative Medicine and Fibrosis Group, Institute for Liver and Digestive Health, University College London, Royal Free Campus, London NW3 2PF, UK; (K.T.); (E.C.); (M.P.); (L.F.); (W.A.-A.); (Z.Z.); (M.G.V.); (M.P.); (G.M.)
| | - Krista Rombouts
- Regenerative Medicine and Fibrosis Group, Institute for Liver and Digestive Health, University College London, Royal Free Campus, London NW3 2PF, UK; (K.T.); (E.C.); (M.P.); (L.F.); (W.A.-A.); (Z.Z.); (M.G.V.); (M.P.); (G.M.)
- Correspondence:
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Delvecchio VS, Sana I, Mantione ME, Vilia MG, Ranghetti P, Rovida A, Angelillo P, Scarfò L, Ghia P, Muzio M. Interleukin‐1 receptor‐associated kinase 4 inhibitor interrupts toll‐like receptor signalling and sensitizes chronic lymphocytic leukaemia cells to apoptosis. Br J Haematol 2020; 189:475-488. [DOI: 10.1111/bjh.16386] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Accepted: 10/11/2019] [Indexed: 01/22/2023]
Affiliation(s)
| | - Ilenia Sana
- Cell signalling Unit Division of Experimental Oncology IRCCS San Raffaele Hospital Milano Italy
- Università Vita‐Salute San Raffaele Milano Italy
| | - Maria Elena Mantione
- Cell signalling Unit Division of Experimental Oncology IRCCS San Raffaele Hospital Milano Italy
| | - Maria Giovanna Vilia
- Cell signalling Unit Division of Experimental Oncology IRCCS San Raffaele Hospital Milano Italy
| | - Pamela Ranghetti
- B‐Cell Neoplasia Unit and Strategic Research Program on CLL Division of Experimental Oncology IRCCS San Raffaele Hospital Milano Italy
| | - Alessandra Rovida
- Università Vita‐Salute San Raffaele Milano Italy
- B‐Cell Neoplasia Unit and Strategic Research Program on CLL Division of Experimental Oncology IRCCS San Raffaele Hospital Milano Italy
| | - Piera Angelillo
- B‐Cell Neoplasia Unit and Strategic Research Program on CLL Division of Experimental Oncology IRCCS San Raffaele Hospital Milano Italy
| | - Lydia Scarfò
- Università Vita‐Salute San Raffaele Milano Italy
- B‐Cell Neoplasia Unit and Strategic Research Program on CLL Division of Experimental Oncology IRCCS San Raffaele Hospital Milano Italy
| | - Paolo Ghia
- Università Vita‐Salute San Raffaele Milano Italy
- B‐Cell Neoplasia Unit and Strategic Research Program on CLL Division of Experimental Oncology IRCCS San Raffaele Hospital Milano Italy
| | - Marta Muzio
- Cell signalling Unit Division of Experimental Oncology IRCCS San Raffaele Hospital Milano Italy
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Fonte E, Vilia MG, Reverberi D, Sana I, Scarfò L, Ranghetti P, Orfanelli U, Cenci S, Cutrona G, Ghia P, Muzio M. Toll-like receptor 9 stimulation can induce IκBζ expression and IgM secretion in chronic lymphocytic leukemia cells. Haematologica 2017; 102:1901-1912. [PMID: 28775123 PMCID: PMC5664394 DOI: 10.3324/haematol.2017.165878] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Accepted: 08/01/2017] [Indexed: 12/13/2022] Open
Abstract
Chronic lymphocytic leukemia cells strongly depend on external stimuli for their survival. Both antigen receptor and co-stimulatory receptors, including Toll-like receptors, can modulate viability and proliferation of leukemic cells. Toll-like receptor ligands, and particularly the TLR9 ligand CpG, mediate heterogeneous responses in patients' samples reflecting the clinical course of the subjects. However, the molecular framework of the key signaling events underlying such heterogeneity is undefined. We focused our studies on a subset of chronic lymphocytic leukemia cases characterized by expression of CD38 and unmutated immunoglobulin genes, who respond to CpG with enhanced metabolic cell activity. We report that, while CpG induces NFKBIZ mRNA in all the samples analyzed, it induces the IκBζ protein in a selected group of cases, through an unanticipated post-transcriptional mechanism. Interestingly, IκBζ plays a causal role in sustaining CpG-induced cell viability and chemoresistance, and CpG stimulation can unleash immunoglobulin secretion by IκBζ-positive malignant cells. These results identify and characterize IκBζ as a marker and effector molecule of distinct key pathways in chronic lymphocytic leukemia.
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Affiliation(s)
- Eleonora Fonte
- Cell Signaling Unit, Division of Experimental Oncology, IRCCS San Raffaele Hospital, Milano, Italy
| | - Maria Giovanna Vilia
- Cell Signaling Unit, Division of Experimental Oncology, IRCCS San Raffaele Hospital, Milano, Italy
| | | | - Ilenia Sana
- Cell Signaling Unit, Division of Experimental Oncology, IRCCS San Raffaele Hospital, Milano, Italy
| | - Lydia Scarfò
- B-Cell Neoplasia Unit and Strategic Research Program on CLL, Division of Experimental Oncology, IRCCS San Raffaele Hospital, Milano, Italy.,Università Vita-Salute San Raffaele, Milano, Italy
| | - Pamela Ranghetti
- B-Cell Neoplasia Unit and Strategic Research Program on CLL, Division of Experimental Oncology, IRCCS San Raffaele Hospital, Milano, Italy
| | - Ugo Orfanelli
- Age Related Diseases Unit, Division of Genetics and Cell Biology, IRCCS San Raffaele Hospital, Milano, Italy
| | - Simone Cenci
- Age Related Diseases Unit, Division of Genetics and Cell Biology, IRCCS San Raffaele Hospital, Milano, Italy
| | - Giovanna Cutrona
- UOC Patologia Molecolare, IRCCS AOU S. Martino-IST, Genova, Italy
| | - Paolo Ghia
- B-Cell Neoplasia Unit and Strategic Research Program on CLL, Division of Experimental Oncology, IRCCS San Raffaele Hospital, Milano, Italy.,Università Vita-Salute San Raffaele, Milano, Italy
| | - Marta Muzio
- Cell Signaling Unit, Division of Experimental Oncology, IRCCS San Raffaele Hospital, Milano, Italy
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Vilia MG, Fonte E, Veliz Rodriguez T, Tocchetti M, Ranghetti P, Scarfò L, Papakonstantinou N, Ntoufa S, Stamatopoulos K, Ghia P, Muzio M. The inhibitory receptor toll interleukin-1R 8 (TIR8/IL-1R8/SIGIRR) is downregulated in chronic lymphocytic leukemia. Leuk Lymphoma 2017; 58:2419-2425. [PMID: 28278705 DOI: 10.1080/10428194.2017.1295142] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Toll interleukin-1 receptor 8 (also known as TIR8, SIGIRR, or IL1R8) is a transmembrane receptor that inhibits inflammation. Accordingly, genetic inactivation of this protein exacerbates chronic inflammation and inflammation-associated tumors in mice. In particular, lack of TIR8 triggers leukemia progression in a mouse model of chronic lymphocytic leukemia (CLL), supporting its role as a novel tumor restrainer. The aim of this study was to measure the amount of TIR8 mRNA and protein in CLL cells, and to analyze its regulation of expression. Circulating leukemic cells expressed lower levels of TIR8 compared to normal B-lymphocytes. Treatment of CLL cells with Azacytidine restored higher levels of TIR8 suggesting that DNA methylation may be involved in modulating TIR8 expression, with implications for novel therapeutic strategies.
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Affiliation(s)
- Maria Giovanna Vilia
- a Division of Experimental Oncology , IRCCS San Raffaele Scientific Institute , Milano , Italy
| | - Eleonora Fonte
- a Division of Experimental Oncology , IRCCS San Raffaele Scientific Institute , Milano , Italy
| | - Tania Veliz Rodriguez
- a Division of Experimental Oncology , IRCCS San Raffaele Scientific Institute , Milano , Italy
| | - Marta Tocchetti
- a Division of Experimental Oncology , IRCCS San Raffaele Scientific Institute , Milano , Italy
| | - Pamela Ranghetti
- a Division of Experimental Oncology , IRCCS San Raffaele Scientific Institute , Milano , Italy
| | - Lydia Scarfò
- a Division of Experimental Oncology , IRCCS San Raffaele Scientific Institute , Milano , Italy.,b Vita-Salute San Raffaele University , Milano , Italy
| | - Nikos Papakonstantinou
- c Institute of Applied Biosciences, CERTH , Thessaloniki , Greece.,d Department of Immunology, Genetics and Pathology, Rudbeck Laboratory , Uppsala University , Uppsala , Sweden
| | - Stavroula Ntoufa
- c Institute of Applied Biosciences, CERTH , Thessaloniki , Greece.,d Department of Immunology, Genetics and Pathology, Rudbeck Laboratory , Uppsala University , Uppsala , Sweden
| | - Kostas Stamatopoulos
- c Institute of Applied Biosciences, CERTH , Thessaloniki , Greece.,d Department of Immunology, Genetics and Pathology, Rudbeck Laboratory , Uppsala University , Uppsala , Sweden
| | - Paolo Ghia
- a Division of Experimental Oncology , IRCCS San Raffaele Scientific Institute , Milano , Italy.,b Vita-Salute San Raffaele University , Milano , Italy
| | - Marta Muzio
- a Division of Experimental Oncology , IRCCS San Raffaele Scientific Institute , Milano , Italy
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