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Padovano C, Bianco SD, Sansico F, De Santis E, Tamiro F, Colucci M, Totti B, Di Iasio S, Bruno G, Panelli P, Miscio G, Mazza T, Giambra V. The Notch1 signaling pathway directly modulates the human RANKL-induced osteoclastogenesis. Sci Rep 2023; 13:21199. [PMID: 38040752 PMCID: PMC10692129 DOI: 10.1038/s41598-023-48615-2] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 11/28/2023] [Indexed: 12/03/2023] Open
Abstract
Notch signaling is an evolutionary conserved pathway with a key role in tissue homeostasis, differentiation and proliferation. It was reported that Notch1 receptor negatively regulates mouse osteoclast development and formation by inhibiting the expression of macrophage colony-stimulating factor in mesenchymal cells. Nonetheless, the involvement of Notch1 pathway in the generation of human osteoclasts is still controversial. Here, we report that the constitutive activation of Notch1 signaling induced a differentiation block in human mononuclear CD14+ cells directly isolated from peripheral blood mononuclear cells (PBMCs) upon in vitro stimulation to osteoclasts. Additionally, using a combined approach of single-cell RNA sequencing (scRNA-Seq) simultaneously with a panel of 31 oligo-conjugated antibodies against cell surface markers (AbSeq assay) as well as unsupervised learning methods, we detected four different cell stages of human RANKL-induced osteoclastogenesis after 5 days in which Notch1 signaling enforces the cell expansion of specific subsets. These cell populations were characterized by distinct gene expression and immunophenotypic profiles and active Notch1, JAK/STAT and WNT signaling pathways. Furthermore, cell-cell communication analyses revealed extrinsic modulators of osteoclast progenitors including the IL7/IL7R and WNT5a/RYK axes. Interestingly, we also report that Interleukin-7 receptor (IL7R) was a downstream effector of Notch1 pathway and that Notch1 and IL7R interplay promoted cell expansion of human RANKL-induced osteoclast progenitors. Taken together, these findings underline a novel cell pattern of human osteoclastogenesis, outlining the key role of Notch1 and IL-7R signaling pathways.
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Affiliation(s)
- Costanzo Padovano
- Hematopathology Laboratory, Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies (ISBReMIT), Fondazione IRCCS "Casa Sollievo della Sofferenza", 71013, San Giovanni Rotondo (FG), Italy
| | - Salvatore Daniele Bianco
- Bioinformatics Unit, Fondazione IRCCS Casa Sollievo della Sofferenza, 71013, San Giovanni Rotondo, Italy
| | - Francesca Sansico
- Hematopathology Laboratory, Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies (ISBReMIT), Fondazione IRCCS "Casa Sollievo della Sofferenza", 71013, San Giovanni Rotondo (FG), Italy
| | - Elisabetta De Santis
- Hematopathology Laboratory, Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies (ISBReMIT), Fondazione IRCCS "Casa Sollievo della Sofferenza", 71013, San Giovanni Rotondo (FG), Italy
| | - Francesco Tamiro
- Hematopathology Laboratory, Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies (ISBReMIT), Fondazione IRCCS "Casa Sollievo della Sofferenza", 71013, San Giovanni Rotondo (FG), Italy
| | - Mattia Colucci
- Hematopathology Laboratory, Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies (ISBReMIT), Fondazione IRCCS "Casa Sollievo della Sofferenza", 71013, San Giovanni Rotondo (FG), Italy
| | - Beatrice Totti
- Hematopathology Laboratory, Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies (ISBReMIT), Fondazione IRCCS "Casa Sollievo della Sofferenza", 71013, San Giovanni Rotondo (FG), Italy
| | - Serena Di Iasio
- Hematopathology Laboratory, Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies (ISBReMIT), Fondazione IRCCS "Casa Sollievo della Sofferenza", 71013, San Giovanni Rotondo (FG), Italy
| | - Gaja Bruno
- Hematopathology Laboratory, Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies (ISBReMIT), Fondazione IRCCS "Casa Sollievo della Sofferenza", 71013, San Giovanni Rotondo (FG), Italy
| | - Patrizio Panelli
- Hematopathology Laboratory, Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies (ISBReMIT), Fondazione IRCCS "Casa Sollievo della Sofferenza", 71013, San Giovanni Rotondo (FG), Italy
| | - Giuseppe Miscio
- Clinical Laboratory Analysis and Transfusional Medicine, Fondazione IRCCS "Casa Sollievo della Sofferenza", 71013, San Giovanni Rotondo (FG), Italy
| | - Tommaso Mazza
- Bioinformatics Unit, Fondazione IRCCS Casa Sollievo della Sofferenza, 71013, San Giovanni Rotondo, Italy
| | - Vincenzo Giambra
- Hematopathology Laboratory, Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies (ISBReMIT), Fondazione IRCCS "Casa Sollievo della Sofferenza", 71013, San Giovanni Rotondo (FG), Italy.
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Panelli P, De Santis E, Colucci M, Tamiro F, Sansico F, Miroballo M, Murgo E, Padovano C, Gusscott S, Ciavarella M, Chavez EA, Bianchi F, Rossi G, Carella AM, Steidl C, Weng AP, Giambra V. Noncanonical β-catenin interactions promote leukemia-initiating activity in early T-cell acute lymphoblastic leukemia. Blood 2023; 141:1597-1609. [PMID: 36315912 PMCID: PMC10651788 DOI: 10.1182/blood.2022017079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 09/13/2022] [Accepted: 09/28/2022] [Indexed: 11/06/2022] Open
Abstract
T-cell acute lymphoblastic leukemia (T-ALL) is a T-cell malignancy characterized by cell subsets and enriched with leukemia-initiating cells (LICs). β-Catenin modulates LIC activity in T-ALL. However, its role in maintaining established leukemia stem cells remains largely unknown. To identify functionally relevant protein interactions of β-catenin in T-ALL, we performed coimmunoprecipitation followed by liquid chromatography-mass spectrometry. Here, we report that a noncanonical functional interaction of β-catenin with the Forkhead box O3 (FOXO3) transcription factor positively regulates LIC-related genes, including the cyclin-dependent kinase 4, which is a crucial modulator of cell cycle and tumor maintenance. We also confirm the relevance of these findings using stably integrated fluorescent reporters of β-catenin and FOXO3 activity in patient-derived xenografts, which identify minor subpopulations with enriched LIC activity. In addition, gene expression data at the single-cell level of leukemic cells of primary patients at the time of diagnosis and minimal residual disease (MRD) up to 30 days after the standard treatments reveal that the expression of β-catenin- and FOXO3-dependent genes is present in the CD82+CD117+ cell fraction, which is substantially enriched with LICs in MRD as well as in early T-cell precursor ALL. These findings highlight key functional roles for β-catenin and FOXO3 and suggest novel therapeutic strategies to eradicate aggressive cell subsets in T-ALL.
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Affiliation(s)
- Patrizio Panelli
- Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
| | - Elisabetta De Santis
- Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
| | - Mattia Colucci
- Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
| | - Francesco Tamiro
- Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
| | - Francesca Sansico
- Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
| | - Mattia Miroballo
- Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
| | - Emanuele Murgo
- Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
| | - Costanzo Padovano
- Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
| | - Sam Gusscott
- Terry Fox Laboratory, British Columbia Cancer, Vancouver, BC, Canada
| | - Michele Ciavarella
- Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
| | | | - Fabrizio Bianchi
- Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
| | - Giovanni Rossi
- Department of Hematology and Stem Cell Transplant Unit, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
| | - Angelo M. Carella
- Department of Hematology and Stem Cell Transplant Unit, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
| | - Christian Steidl
- Centre for Lymphoid Cancer, British Columbia Cancer, Vancouver, BC, Canada
| | - Andrew P. Weng
- Terry Fox Laboratory, British Columbia Cancer, Vancouver, BC, Canada
| | - Vincenzo Giambra
- Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
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Colangelo T, Panelli P, Mazzarelli F, Tamiro F, Melocchi V, De Santis E, Cuttano R, Palumbo O, Rossi G, Bianchi F, Giambra V. Extracellular vesicle microRNAs contribute to Notch signaling pathway in T-cell acute lymphoblastic leukemia. Mol Cancer 2022; 21:226. [PMID: 36550553 PMCID: PMC9773489 DOI: 10.1186/s12943-022-01698-3] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Accepted: 12/07/2022] [Indexed: 12/24/2022] Open
Abstract
T-cell acute lymphoblastic leukemia (T-ALL) is an aggressive T-cell malignancy characterized by genotypically-defined and phenotypically divergent cell populations, governed by adaptive landscapes. Clonal expansions are associated to genetic and epigenetic events, and modulation of external stimuli that affect the hierarchical structure of subclones and support the dynamics of leukemic subsets. Recently, small extracellular vesicles (sEV) such as exosomes were also shown to play a role in leukemia. Here, by coupling miRNome, bulk and single cell transcriptome profiling, we found that T-ALL-secreted sEV contain NOTCH1-dependent microRNAs (EV-miRs), which control oncogenic pathways acting as autocrine stimuli and ultimately promoting the expansion/survival of highly proliferative cell subsets of human T-cell leukemias. Of interest, we found that NOTCH1-dependent EV-miRs mostly comprised members of miR-17-92a cluster and paralogues, which rescued in vitro the proliferation of T-ALL cells blocked by γ-secretase inhibitors (GSI) an regulated a network of genes characterizing patients with relapsed/refractory early T-cell progenitor (ETP) ALLs. All these findings suggest that NOTCH1 dependent EV-miRs may sustain the growth/survival of immunophenotypically defined cell populations, altering the cell heterogeneity and the dynamics of T-cell leukemias in response to conventional therapies.
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Affiliation(s)
- Tommaso Colangelo
- grid.413503.00000 0004 1757 9135Unit of Cancer Biomarker, Fondazione IRCCS Casa Sollievo Della Sofferenza, Viale Padre Pio 7, 71013 San Giovanni Rotondo, FG Italy
| | - Patrizio Panelli
- grid.413503.00000 0004 1757 9135Unit of Hematopathology, Fondazione IRCCS Casa Sollievo Della Sofferenza, Viale Padre Pio 7, 71013 San Giovanni Rotondo, FG Italy
| | - Francesco Mazzarelli
- grid.413503.00000 0004 1757 9135Unit of Cancer Biomarker, Fondazione IRCCS Casa Sollievo Della Sofferenza, Viale Padre Pio 7, 71013 San Giovanni Rotondo, FG Italy
| | - Francesco Tamiro
- grid.413503.00000 0004 1757 9135Unit of Hematopathology, Fondazione IRCCS Casa Sollievo Della Sofferenza, Viale Padre Pio 7, 71013 San Giovanni Rotondo, FG Italy
| | - Valentina Melocchi
- grid.413503.00000 0004 1757 9135Unit of Cancer Biomarker, Fondazione IRCCS Casa Sollievo Della Sofferenza, Viale Padre Pio 7, 71013 San Giovanni Rotondo, FG Italy
| | - Elisabetta De Santis
- grid.413503.00000 0004 1757 9135Unit of Hematopathology, Fondazione IRCCS Casa Sollievo Della Sofferenza, Viale Padre Pio 7, 71013 San Giovanni Rotondo, FG Italy
| | - Roberto Cuttano
- grid.413503.00000 0004 1757 9135Unit of Cancer Biomarker, Fondazione IRCCS Casa Sollievo Della Sofferenza, Viale Padre Pio 7, 71013 San Giovanni Rotondo, FG Italy
| | - Orazio Palumbo
- grid.413503.00000 0004 1757 9135Division of Medical Genetics, Fondazione IRCCS Casa Sollievo Della Sofferenza, 71013 San Giovanni Rotondo, FG Italy
| | - Giovanni Rossi
- grid.413503.00000 0004 1757 9135Department of Hematology and Stem Cell Transplant Unit, Fondazione IRCCS Casa Sollievo Della Sofferenza, 71013 San Giovanni Rotondo, FG Italy
| | - Fabrizio Bianchi
- grid.413503.00000 0004 1757 9135Unit of Cancer Biomarker, Fondazione IRCCS Casa Sollievo Della Sofferenza, Viale Padre Pio 7, 71013 San Giovanni Rotondo, FG Italy
| | - Vincenzo Giambra
- grid.413503.00000 0004 1757 9135Unit of Hematopathology, Fondazione IRCCS Casa Sollievo Della Sofferenza, Viale Padre Pio 7, 71013 San Giovanni Rotondo, FG Italy
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Grasselli C, Carbone A, Panelli P, Giambra V, Bossi M, Mazzoccoli G, De Filippis L. Neural Stem Cells from Shank3-ko Mouse Model Autism Spectrum Disorders. Mol Neurobiol 2019; 57:1502-1515. [PMID: 31773410 DOI: 10.1007/s12035-019-01811-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [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: 07/22/2019] [Accepted: 09/30/2019] [Indexed: 02/07/2023]
Abstract
Autism spectrum disorders (ASD) comprise a complex of neurodevelopmental disorders caused by a variety of genetic defects and characterized by alterations in social communication and repetitive behavior. Since the mechanisms leading to early neuronal degeneration remain elusive, we chose to examine the properties of NSCs isolated from an animal model of ASD in order to evaluate whether their neurogenic potential may recapitulate the early phases of neurogenesis in the brain of ASD patients. Mutations of the gene coding for the Shank3 protein play a key role in the impairment of brain development and synaptogenesis in ASD patients. Experiments here reported show that NSCs derived from the subventricular zone (SVZ) of adult Shank3Δ11-/- (Shank3-ko) mice retain self-renewal capacity in vitro, but differentiate earlier than wild-type (wt) cells, displaying an evident endosomal/lysosomal and ubiquitin aggregation in astroglial cells together with mitochondrial impairment and inflammasome activation, suggesting that glial degeneration likely contributes to neuronal damage in ASD. These in vitro observations obtained in our disease model are consistent with data in vivo obtained in ASD patients and suggest that Shank3 deficit could affect the late phases of neurogenesis and/or the survival of mature cells rather than NSC self-renewal. This evidence supports Shank3-ko NSCs as a reliable in vitro disease model and suggests the rescue of glial cells as a therapeutic strategy to prevent neuronal degeneration in ASD.
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Affiliation(s)
- C Grasselli
- Department of Medicine and Surgery, University of Milan-Bicocca, Milan, Italy
| | - A Carbone
- Department of Medical Sciences, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, FG, Italy
| | - P Panelli
- Department of Regenerative Medicine, Fondazione IRCCS Casa Sollievo della Sofferenza, Via dei Cappuccini 1, 71013, San Giovanni Rotondo, FG, Italy
| | - V Giambra
- Department of Regenerative Medicine, Fondazione IRCCS Casa Sollievo della Sofferenza, Via dei Cappuccini 1, 71013, San Giovanni Rotondo, FG, Italy
| | - M Bossi
- Department of Medicine and Surgery, University of Milan-Bicocca, Milan, Italy
| | - G Mazzoccoli
- Department of Medical Sciences, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, FG, Italy
| | - L De Filippis
- Department of Regenerative Medicine, Fondazione IRCCS Casa Sollievo della Sofferenza, Via dei Cappuccini 1, 71013, San Giovanni Rotondo, FG, Italy.
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Morlino S, Carbone A, Ritelli M, Fusco C, Giambra V, Nardella G, Notarangelo A, Panelli P, Mazzoccoli G, Zoppi N, Grammatico P, Wade EM, Colombi M, Castori M, Micale L. TAB2 c.1398dup variant leads to haploinsufficiency and impairs extracellular matrix homeostasis. Hum Mutat 2019; 40:1886-1898. [PMID: 31250519 DOI: 10.1002/humu.23834] [Citation(s) in RCA: 5] [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: 03/13/2019] [Revised: 05/28/2019] [Accepted: 05/31/2019] [Indexed: 12/16/2022]
Abstract
Transforming growth factor β-activated kinase 1 (TAK1) mediates multiple biological processes through the nuclear factor κ-light-chain-enhancer of activated B cells (NF-κB) and the mitogen-activated protein kinase (MAPK) signaling pathways. TAK1 activation is tightly regulated by its binding partners (TABs). In particular, binding with TAB2 is crucial for cardiovascular development and extracellular matrix (ECM) homeostasis. In our previous work, we reported a novel multisystem disorder associated with the heterozygous TAB2 c.1398dup variant. Here, we dissect the functional effects of this variant in order to understand its molecular pathogenesis. We demonstrate that TAB2 c.1398dup considerably undergoes to nonsense-mediated messenger RNA decay and encodes a truncated protein that loses its ability to bind TAK1. We also show an alteration of the TAK1 autophosphorylation status and of selected downstream signaling pathways in patients' fibroblasts. Immunofluorescence analyses and ECM-related polymerase chain reaction-array panels highlight that patient fibroblasts display ECM disorganization and altered expression of selected ECM components and collagen-related pathways. In conclusion, we deeply dissect the molecular pathogenesis of the TAB2 c.1398dup variant and show that the resulting phenotype is well explained by TAB2 loss-of-function. Our data also offer initial insights on the ECM homeostasis impairment as a molecular mechanism probably underlying a multisystem disorder linked to TAB2.
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Affiliation(s)
- Silvia Morlino
- Laboratory of Medical Genetics, Department of Molecular Medicine, San Camillo-Forlanini Hospital, Sapienza University, Rome, Italy
| | - Annalucia Carbone
- Division of Internal Medicine and Unit of Chronobiology, Fondazione IRCCS Casa Sollievo della Sofferenza, Foggia, Italy
| | - Marco Ritelli
- Division of Biology and Genetics, Department of Molecular and Translational Medicine, Universityinflammatory disorders and cancer of Brescia, Brescia, Italy
| | - Carmela Fusco
- Division of Medical Genetics, Fondazione IRCCS Casa Sollievo della Sofferenza, Foggia, Italy
| | - Vincenzo Giambra
- Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies (ISBReMIT), Fondazione IRCCS Casa Sollievo della Sofferenza, Foggia, Italy
| | - Grazia Nardella
- Division of Medical Genetics, Fondazione IRCCS Casa Sollievo della Sofferenza, Foggia, Italy.,Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | | | - Patrizio Panelli
- Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies (ISBReMIT), Fondazione IRCCS Casa Sollievo della Sofferenza, Foggia, Italy
| | - Gianluigi Mazzoccoli
- Division of Internal Medicine and Unit of Chronobiology, Fondazione IRCCS Casa Sollievo della Sofferenza, Foggia, Italy
| | - Nicoletta Zoppi
- Division of Biology and Genetics, Department of Molecular and Translational Medicine, Universityinflammatory disorders and cancer of Brescia, Brescia, Italy
| | - Paola Grammatico
- Laboratory of Medical Genetics, Department of Molecular Medicine, San Camillo-Forlanini Hospital, Sapienza University, Rome, Italy
| | - Emma M Wade
- Department of Women's and Children's Health, Dunedin School of Medicine, University of Otago, Dunedin, New Zealand
| | - Marina Colombi
- Division of Biology and Genetics, Department of Molecular and Translational Medicine, Universityinflammatory disorders and cancer of Brescia, Brescia, Italy
| | - Marco Castori
- Division of Medical Genetics, Fondazione IRCCS Casa Sollievo della Sofferenza, Foggia, Italy
| | - Lucia Micale
- Division of Medical Genetics, Fondazione IRCCS Casa Sollievo della Sofferenza, Foggia, Italy
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Giambra V, Gusscott S, Gracias D, Song R, Lam SH, Panelli P, Tyshchenko K, Jenkins CE, Hoofd C, Lorzadeh A, Carles A, Hirst M, Eaves CJ, Weng AP. Epigenetic Restoration of Fetal-like IGF1 Signaling Inhibits Leukemia Stem Cell Activity. Cell Stem Cell 2018; 23:714-726.e7. [PMID: 30269902 DOI: 10.1016/j.stem.2018.08.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [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: 10/27/2017] [Revised: 06/15/2018] [Accepted: 08/30/2018] [Indexed: 12/13/2022]
Abstract
Acute leukemias are aggressive malignancies of developmentally arrested hematopoietic progenitors. We sought here to explore the possibility that changes in hematopoietic stem/progenitor cells during development might alter the biology of leukemias arising from this tissue compartment. Using a mouse model of acute T cell leukemia, we found that leukemias generated from fetal liver (FL) and adult bone marrow (BM) differed dramatically in their leukemia stem cell activity with FL leukemias showing markedly reduced serial transplantability as compared to BM leukemias. We present evidence that this difference is due to NOTCH1-driven autocrine IGF1 signaling, which is active in FL cells but restrained in BM cells by EZH2-dependent H3K27 trimethylation. Further, we confirmed this mechanism is operative in human disease and show that enforced IGF1 signaling effectively limits leukemia stem cell activity. These findings demonstrate that resurrecting dormant fetal programs in adult cells may represent an alternate therapeutic approach in human cancer.
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Affiliation(s)
- Vincenzo Giambra
- Terry Fox Laboratory, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada; Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies (ISBReMIT), Fondazione IRCCS Casa Sollievo della Sofferenza, 71013 San Giovanni Rotondo (FG), Italy.
| | - Samuel Gusscott
- Terry Fox Laboratory, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada
| | - Deanne Gracias
- Terry Fox Laboratory, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada
| | - Raymond Song
- Terry Fox Laboratory, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada
| | - Sonya H Lam
- Terry Fox Laboratory, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada
| | - Patrizio Panelli
- Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies (ISBReMIT), Fondazione IRCCS Casa Sollievo della Sofferenza, 71013 San Giovanni Rotondo (FG), Italy
| | | | | | - Catherine Hoofd
- Terry Fox Laboratory, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada
| | - Alireza Lorzadeh
- Michael Smith Laboratories and Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Annaick Carles
- Michael Smith Laboratories and Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Martin Hirst
- Michael Smith Laboratories and Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Connie J Eaves
- Terry Fox Laboratory, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada
| | - Andrew P Weng
- Terry Fox Laboratory, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada.
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Panelli D, Lorusso FP, Papa F, Panelli P, Stella A, Caputi M, Sardanelli AM, Papa S. The mechanism of alternative splicing of the X-linked NDUFB11 gene of the respiratory chain complex I, impact of rotenone treatment in neuroblastoma cells. Biochim Biophys Acta 2012; 1829:211-8. [PMID: 23246602 DOI: 10.1016/j.bbagrm.2012.12.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2012] [Revised: 11/12/2012] [Accepted: 12/05/2012] [Indexed: 12/25/2022]
Abstract
A study is presented on the regulation of alternative splicing (AS) of the Ndufb11 gene of complex I of the mitochondrial respiratory chain and the impact on this process of rotenone treatment in neuroblastoma cells. In physiological conditions the Ndufb11 gene produces at high level a short transcript isoform encoding for a 153 aa protein. This subunit is essential for the assembly of a functional and stable mammalian complex I. The gene produces also, at low level, a longer transcript isoform encoding for a 163 aa protein whose role is unknown. Evidence is presented here showing that the level of the two isoforms is regulated by three DGGGD ESS elements located in exon 2 which can bind the hnRNPH1 protein. In neuronal cells rotenone treatment affects the Ndufb11 alternative splicing pathway, with the increase of the 163/153 mRNAs ratio. This effect appears to be due to the down-regulation of the hnRNPH1 protein. Since rotenone induces apoptosis in neuronal cells, the post-transcriptional regulation of the Ndufb11 gene can be involved in the programmed cell death process.
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Affiliation(s)
- Damiano Panelli
- Department of Basic Medical Sciences, University of Bari Aldo Moro, Bari, Italy.
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