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Shi G, Hu Y. TNFR1 and TNFR2, Which Link NF-κB Activation, Drive Lung Cancer Progression, Cell Dedifferentiation, and Metastasis. Cancers (Basel) 2023; 15:4299. [PMID: 37686574 PMCID: PMC10487001 DOI: 10.3390/cancers15174299] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 08/25/2023] [Accepted: 08/27/2023] [Indexed: 09/10/2023] Open
Abstract
TNFR1 and TNFR2, encoded by TNFRSF1A and TNFRSF1B, respectively, are the most well-characterized members among the TNFR superfamily. TNFR1 is expressed in most cell types, while TNFR2 has been reported to be preferentially expressed in leukocytes. Lung cancer remains the leading cause of cancer mortality worldwide but TNFRs' activities in lung cancer development have not been fully evaluated. Recently, overexpressed TNFR1 was reported in a large proportion of human lung squamous cell carcinomas. Increased TNFR1 coupled with increased UBCH10 caused lung SCC cell dedifferentiation with epithelial-mesenchymal transition features and the metastasis in a combined spontaneous lung SCC and TNFR1 transgenic mouse model. UBCH10, an E2 ubiquitin-conjugating enzyme that is an oncogene, increased Sox2, c-Myc, Twist1, and Bcl2 levels. Increased TNFR1 upregulated UBCH10 expression by activating c-Rel and p65 NF-κB. Lung SCC patients overexpressing TNFRSF1A and one of these target genes died early compared to lung SCC patients expressing lower levels of these genes. Recently, we also revealed that TNFR2 was required for lung adenocarcinoma progression, delivering a signaling pathway of TNF/TNFR2/NF-κB-c-Rel, in which macrophage-produced ROS and TNF converted CD4 T cells to Foxp3 Treg cells, generating an immunosuppressive tumor microenvironment and promoting lung ADC progression. In human lung ADC cohorts, TNFRSF1B expression was highly correlated with TNF, FOXP3, and CD4 expression. Of note, TNF stimulated the activities of TNFR1 and TNFR2, two membrane-binding receptors, which accelerate tumorigenesis through diverse mechanisms. This review focuses on these new findings regarding the roles of TNFR1 and TNFR2 in lung SCC and ADC development in humans and mice, and highlights the potential therapeutic targets of human lung cancers.
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Affiliation(s)
| | - Yinling Hu
- Cancer Innovation Laboratory, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, USA;
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2
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A TNFR1-UBCH10 axis drives lung squamous cell carcinoma dedifferentiation and metastasis through a cell-autonomous signaling loop. Cell Death Dis 2022; 13:885. [PMID: 36270982 PMCID: PMC9587052 DOI: 10.1038/s41419-022-05308-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 09/26/2022] [Accepted: 09/28/2022] [Indexed: 11/18/2022]
Abstract
Tumor necrosis factor receptor 1 (TNFR1), encoded by TNFRSF1A, is a critical transducer of inflammatory pathways, but its physiological role in human cancer is not completely understood. Here, we observed high expression of TNFR1 in many human lung squamous cell carcinoma (SCCs) samples and in spontaneous lung SCCs derived from kinase-dead Ikkα knock-in (KA/KA) mice. Knocking out Tnfrf1a in KA/KA mice blocked lung SCC formation. When injected via tail vein, KALLU+ lung SCC cells that highly expressed TNFR1/TNF, Sox2, c-Myc, Twist1, Bcl2, and UBCH10, generated dedifferentiated spindle cell carcinomas with epithelial-mesenchymal transition markers in mouse lungs. In contrast, KALLU+ cells with silenced TNFR1 and KALLU- cells that expressed low levels of TNFR1 generated well-differentiated lung SCCs and were less tumorigenic and metastatic. We identified a downstream effector of TNFR1: oncogenic UBCH10, an E2 ubiquitin-conjugating enzyme with targets including Twist1, c-Myc, and Sox2, which enhanced SCC cell dedifferentiation. Furthermore, Tg-K5.TNFR1;KA/KA mice, which expressed transgenic TNFR1 in keratin 5-positve epithelial cells, developed more poorly differentiated and metastatic lung SCCs than those found in KA/KA mice. These findings demonstrate that an overexpressed TNFR1-UBCH10 axis advances lung carcinogenesis and metastasis through a dedifferentiation mechanism. Constituents in this pathway may contribute to the development of differentiation-related therapies for lung SCC.
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IKKα-deficient lung adenocarcinomas generate an immunosuppressive microenvironment by overproducing Treg-inducing cytokines. Proc Natl Acad Sci U S A 2022; 119:2120956119. [PMID: 35121655 PMCID: PMC8833198 DOI: 10.1073/pnas.2120956119] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/23/2021] [Indexed: 11/18/2022] Open
Abstract
The tumor microenvironment (TME) provides potential targets for cancer therapy. However, how signals originating in cancer cells affect tumor-directed immunity is largely unknown. Deletions in the CHUK locus, coding for IκB kinase α (IKKα), correlate with reduced lung adenocarcinoma (ADC) patient survival and promote KrasG12D-initiated ADC development in mice, but it is unknown how reduced IKKα expression affects the TME. Here, we report that low IKKα expression in human and mouse lung ADC cells correlates with increased monocyte-derived macrophage and regulatory T cell (Treg) scores and elevated transcription of genes coding for macrophage-recruiting and Treg-inducing cytokines (CSF1, CCL22, TNF, and IL-23A). By stimulating recruitment of monocyte-derived macrophages from the bone marrow and enforcing a TNF/TNFR2/c-Rel signaling cascade that stimulates Treg generation, these cytokines promote lung ADC progression. Depletion of TNFR2, c-Rel, or TNF in CD4+ T cells or monocyte-derived macrophages dampens Treg generation and lung tumorigenesis. Treg depletion also attenuates carcinogenesis. In conclusion, reduced cancer cell IKKα activity enhances formation of a protumorigenic TME through a pathway whose constituents may serve as therapeutic targets for KRAS-initiated lung ADC.
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García-García VA, Alameda JP, Page A, Mérida-García A, Navarro M, Tejero A, Paramio JM, García-Fernández RA, Casanova ML. IKKα Induces Epithelial–Mesenchymal Changes in Mouse Skin Carcinoma Cells That Can Be Partially Reversed by Apigenin. Int J Mol Sci 2022; 23:ijms23031375. [PMID: 35163299 PMCID: PMC8836221 DOI: 10.3390/ijms23031375] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 01/21/2022] [Accepted: 01/21/2022] [Indexed: 11/30/2022] Open
Abstract
NMSC (non-melanoma skin cancer) is a common tumor in the Caucasian population, accounting for 90% of skin cancers. Among them, squamous cell carcinomas (SCCs) can metastasize and, due to its high incidence, constitute a severe health problem. It has been suggested that cutaneous SCCs with more risk to metastasize express high levels of nuclear IKKα. However, the molecular mechanisms that lead to this enhanced aggressiveness are largely unknown. To understand in depth the influence of nuclear IKKα in skin SCC progression, we have generated murine PDVC57 skin carcinoma cells expressing exogenous IKKα either in the nucleus or in the cytoplasm to further distinguish the tumor properties of IKKα in both localizations. Our results show that IKKα promotes changes in both subcellular compartments, resembling EMT (epithelial–mesenchymal transition), which are more pronounced when IKKα is in the nucleus of these tumor cells. These EMT-related changes include a shift toward a migratory phenotype and induction of the expression of proteins involved in cell matrix degradation, cell survival and resistance to apoptosis. Additionally, we have found that apigenin, a flavonoid with anti-cancer properties, inhibits the expression of IKKα and attenuates most of the pro-tumoral EMT changes induced by IKKα in mouse tumor keratinocytes. Nevertheless, we have found that apigenin only inhibits the expression of the IKKα protein when it is localized in the cytoplasm.
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Affiliation(s)
- Verónica A. García-García
- Molecular and Translational Oncology Unit, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain; (V.A.G.-G.); (J.P.A.); (A.P.); (A.M.-G.); (M.N.); (A.T.); (J.M.P.)
- Biomedical Research Institute I+12, 12 de Octubre University Hospital, 28040 Madrid, Spain
| | - Josefa P. Alameda
- Molecular and Translational Oncology Unit, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain; (V.A.G.-G.); (J.P.A.); (A.P.); (A.M.-G.); (M.N.); (A.T.); (J.M.P.)
- Biomedical Research Institute I+12, 12 de Octubre University Hospital, 28040 Madrid, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), 28029 Madrid, Spain
| | - Angustias Page
- Molecular and Translational Oncology Unit, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain; (V.A.G.-G.); (J.P.A.); (A.P.); (A.M.-G.); (M.N.); (A.T.); (J.M.P.)
- Biomedical Research Institute I+12, 12 de Octubre University Hospital, 28040 Madrid, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), 28029 Madrid, Spain
| | - Antonio Mérida-García
- Molecular and Translational Oncology Unit, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain; (V.A.G.-G.); (J.P.A.); (A.P.); (A.M.-G.); (M.N.); (A.T.); (J.M.P.)
- Complejo Asistencial de Zamora, 49022 Zamora, Spain
| | - Manuel Navarro
- Molecular and Translational Oncology Unit, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain; (V.A.G.-G.); (J.P.A.); (A.P.); (A.M.-G.); (M.N.); (A.T.); (J.M.P.)
- Biomedical Research Institute I+12, 12 de Octubre University Hospital, 28040 Madrid, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), 28029 Madrid, Spain
| | - Adrián Tejero
- Molecular and Translational Oncology Unit, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain; (V.A.G.-G.); (J.P.A.); (A.P.); (A.M.-G.); (M.N.); (A.T.); (J.M.P.)
| | - Jesús M. Paramio
- Molecular and Translational Oncology Unit, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain; (V.A.G.-G.); (J.P.A.); (A.P.); (A.M.-G.); (M.N.); (A.T.); (J.M.P.)
- Biomedical Research Institute I+12, 12 de Octubre University Hospital, 28040 Madrid, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), 28029 Madrid, Spain
| | - Rosa A. García-Fernández
- Department of Animal Medicine and Surgery, Facultad de Veterinaria, Complutense University of Madrid (UCM), 28040 Madrid, Spain;
| | - M. Llanos Casanova
- Molecular and Translational Oncology Unit, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain; (V.A.G.-G.); (J.P.A.); (A.P.); (A.M.-G.); (M.N.); (A.T.); (J.M.P.)
- Biomedical Research Institute I+12, 12 de Octubre University Hospital, 28040 Madrid, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), 28029 Madrid, Spain
- Correspondence:
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Zhu F, Willette-Brown J, Zhang J, Ferre EMN, Sun Z, Wu X, Lionakis MS, Hu Y. NLRP3 Inhibition Ameliorates Severe Cutaneous Autoimmune Manifestations in a Mouse Model of Autoimmune Polyendocrinopathy-Candidiasis-Ectodermal Dystrophy-Like Disease. J Invest Dermatol 2021; 141:1404-1415. [PMID: 33188780 PMCID: PMC8110612 DOI: 10.1016/j.jid.2020.10.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 09/25/2020] [Accepted: 10/20/2020] [Indexed: 02/07/2023]
Abstract
Patients with autoimmune polyendocrinopathy-candidiasis-ectodermal dystrophy show diverse endocrine and nonendocrine manifestations initiated by self-reactive T cells because of AIRE mutation-induced defective central tolerance. A large number of American patients with autoimmune polyendocrinopathy-candidiasis-ectodermal dystrophy suffer from early-onset cutaneous inflammatory lesions accompanied by an infiltration of T cells and myeloid cells. The role of myeloid cells in this setting remains to be fully investigated. In this study, we characterize the autoinflammatory phenotypes in the skin of both autoimmune polyendocrinopathy-candidiasis-ectodermal dystrophy-like kinase-dead Ikkα knockin mice and patients with autoimmune polyendocrinopathy-candidiasis-ectodermal dystrophy. We found a marked infiltration of autoreactive CD4 T cells, macrophages, and neutrophils; elevated uric acid; and increased NLRP3, a major inflammasome component. Depleting autoreactive CD4 T cells or ablating Ccl2/Cxcr2 genes significantly attenuated the inflammasome activity, inflammation, and skin phenotypes in kinase-dead Ikkα knockin mice. Importantly, treatment with an NLRP3 inhibitor reduced skin phenotypes and decreased infiltration of CD4 T cells, macrophages, and neutrophils. These results suggest that increased myeloid cell infiltration contributes to autoreactive CD4 T cell-mediated skin autoinflammation. Thus, our findings reveal that the combined infiltration of macrophages and neutrophils is required for autoreactive CD4 T cell-mediated skin disease pathogenesis and that the NLRP3-dependent inflammasome is a potential therapeutic target for the cutaneous manifestations of autoimmune diseases.
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Affiliation(s)
- Feng Zhu
- Laboratory of Cancer Immunometabolism, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, Maryland, USA
| | - Jami Willette-Brown
- Laboratory of Cancer Immunometabolism, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, Maryland, USA
| | - Jian Zhang
- Laboratory of Cancer Immunometabolism, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, Maryland, USA; Department of Ophthalmology, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China; Shanghai Key Laboratory of Ocular Fundus Diseases, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai, China; Shanghai Engineering Center for Visual Science and Photomedicine, Shanghai, China; National Clinical Research Center for Eye Diseases, Shanghai, China; Shanghai Engineering Center for Precise Diagnosis and Treatment of Eye Diseases, Shanghai, China
| | - Elise M N Ferre
- Fungal Pathogenesis Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, Bethesda, Maryland, USA
| | - Zhonghe Sun
- Cancer Research Technology Program, Frederick National Laboratory for Cancer Research, Frederick, Maryland, USA
| | - Xiaolin Wu
- Cancer Research Technology Program, Frederick National Laboratory for Cancer Research, Frederick, Maryland, USA
| | - Michail S Lionakis
- Fungal Pathogenesis Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, Bethesda, Maryland, USA
| | - Yinling Hu
- Laboratory of Cancer Immunometabolism, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, Maryland, USA.
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Li X, Hu Y. Attribution of NF-κB Activity to CHUK/IKKα-Involved Carcinogenesis. Cancers (Basel) 2021; 13:cancers13061411. [PMID: 33808757 PMCID: PMC8003426 DOI: 10.3390/cancers13061411] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 03/08/2021] [Accepted: 03/15/2021] [Indexed: 11/16/2022] Open
Abstract
Simple Summary CHUK/IKKα has emerged as a novel tumor suppressor in several organs of humans and mice. In general, activation of NF-κB promotes inflammation and tumorigenesis. IKKα reduction stimulates inflammatory responses including NF-κB’s targets and NF-κB-independent pathways for tumor promotion. Specific phenomena from genetically-modified mice and human TCGA database show the crosstalk between IKKα and NF-κB although their nature paths for normal organ development and the disease and cancer pathogenesis remains largely under investigation. In this review, we focus on the interplay between IKKα and NF-κB signaling during carcinogenesis. A better understanding of their relationship will provide insight into therapeutic targets of cancer. Abstract Studies analyzing human cancer genome sequences and genetically modified mouse models have extensively expanded our understanding of human tumorigenesis, even challenging or reversing the dogma of certain genes as originally characterized by in vitro studies. Inhibitor-κB kinase α (IKKα), which is encoded by the conserved helix-loop-helix ubiquitous kinase (CHUK) gene, is first identified as a serine/threonine protein kinase in the inhibitor-κB kinase complex (IKK), which is composed of IKKα, IKKβ, and IKKγ (NEMO). IKK phosphorylates serine residues 32 and 36 of IκBα, a nuclear factor-κB (NF-κB) inhibitor, to induce IκBα protein degradation, resulting in the nuclear translocation of NF-κB dimers that function as transcriptional factors to regulate immunity, infection, lymphoid organ/cell development, cell death/growth, and tumorigenesis. NF-κB and IKK are broadly and differentially expressed in the cells of our body. For a long time, the idea that the IKK complex acts as a direct upstream activator of NF-κB in carcinogenesis has been predominately accepted in the field. Surprisingly, IKKα has emerged as a novel suppressor for skin, lung, esophageal, and nasopharyngeal squamous cell carcinoma, as well as lung and pancreatic adenocarcinoma (ADC). Thus, Ikkα loss is a tumor driver in mice. On the other hand, lacking the RANKL/RANK/IKKα pathway impairs mammary gland development and attenuates oncogene- and chemical carcinogen-induced breast and prostate tumorigenesis and metastasis. In general, NF-κB activation leads one of the major inflammatory pathways and stimulates tumorigenesis. Since IKKα and NF-κB play significant roles in human health, revealing the interplay between them greatly benefits the diagnosis, treatment, and prevention of human cancer. In this review, we discuss the intriguing attribution of NF-κB to CHUK/IKKα-involved carcinogenesis.
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Moser B, Hochreiter B, Basílio J, Gleitsmann V, Panhuber A, Pardo-Garcia A, Hoesel B, Salzmann M, Resch U, Noreen M, Schmid JA. The inflammatory kinase IKKα phosphorylates and stabilizes c-Myc and enhances its activity. Mol Cancer 2021; 20:16. [PMID: 33461590 PMCID: PMC7812655 DOI: 10.1186/s12943-021-01308-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 01/04/2021] [Indexed: 02/06/2023] Open
Abstract
Background The IκB kinase (IKK) complex, comprising the two enzymes IKKα and IKKβ, is the main activator of the inflammatory transcription factor NF-κB, which is constitutively active in many cancers. While several connections between NF-κB signaling and the oncogene c-Myc have been shown, functional links between the signaling molecules are still poorly studied. Methods Molecular interactions were shown by co-immunoprecipitation and FRET microscopy. Phosphorylation of c-Myc was shown by kinases assays and its activity by improved reporter gene systems. CRISPR/Cas9-mediated gene knockout and chemical inhibition were used to block IKK activity. The turnover of c-Myc variants was determined by degradation in presence of cycloheximide and by optical pulse-chase experiments.. Immunofluorescence of mouse prostate tissue and bioinformatics of human datasets were applied to correlate IKKα- and c-Myc levels. Cell proliferation was assessed by EdU incorporation and apoptosis by flow cytometry. Results We show that IKKα and IKKβ bind to c-Myc and phosphorylate it at serines 67/71 within a sequence that is highly conserved. Knockout of IKKα decreased c-Myc-activity and increased its T58-phosphorylation, the target site for GSK3β, triggering polyubiquitination and degradation. c-Myc-mutants mimicking IKK-mediated S67/S71-phosphorylation exhibited slower turnover, higher cell proliferation and lower apoptosis, while the opposite was observed for non-phosphorylatable A67/A71-mutants. A significant positive correlation of c-Myc and IKKα levels was noticed in the prostate epithelium of mice and in a variety of human cancers. Conclusions Our data imply that IKKα phosphorylates c-Myc on serines-67/71, thereby stabilizing it, leading to increased transcriptional activity, higher proliferation and decreased apoptosis. Supplementary Information The online version contains supplementary material available at 10.1186/s12943-021-01308-8.
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Affiliation(s)
- Bernhard Moser
- Institute of Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Schwarzspanierstraße 17, 1090, Vienna, Austria
| | - Bernhard Hochreiter
- Institute of Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Schwarzspanierstraße 17, 1090, Vienna, Austria
| | - José Basílio
- Institute of Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Schwarzspanierstraße 17, 1090, Vienna, Austria
| | - Viola Gleitsmann
- Institute of Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Schwarzspanierstraße 17, 1090, Vienna, Austria
| | - Anja Panhuber
- Institute of Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Schwarzspanierstraße 17, 1090, Vienna, Austria
| | - Alan Pardo-Garcia
- Institute of Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Schwarzspanierstraße 17, 1090, Vienna, Austria
| | - Bastian Hoesel
- Institute of Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Schwarzspanierstraße 17, 1090, Vienna, Austria
| | - Manuel Salzmann
- Institute of Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Schwarzspanierstraße 17, 1090, Vienna, Austria
| | - Ulrike Resch
- Institute of Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Schwarzspanierstraße 17, 1090, Vienna, Austria
| | - Mamoona Noreen
- Institute of Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Schwarzspanierstraße 17, 1090, Vienna, Austria
| | - Johannes A Schmid
- Institute of Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Schwarzspanierstraße 17, 1090, Vienna, Austria.
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Guan Y, Yang YJ, Nagarajan P, Ge Y. Transcriptional and signalling regulation of skin epithelial stem cells in homeostasis, wounds and cancer. Exp Dermatol 2020; 30:529-545. [PMID: 33249665 DOI: 10.1111/exd.14247] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 10/10/2020] [Accepted: 11/13/2020] [Indexed: 02/06/2023]
Abstract
The epidermis and skin appendages are maintained by their resident epithelial stem cells, which undergo long-term self-renewal and multilineage differentiation. Upon injury, stem cells are activated to mediate re-epithelialization and restore tissue function. During this process, they often mount lineage plasticity and expand their fates in response to damage signals. Stem cell function is tightly controlled by transcription machineries and signalling transductions, many of which derail in degenerative, inflammatory and malignant dermatologic diseases. Here, by describing both well-characterized and newly emerged pathways, we discuss the transcriptional and signalling mechanisms governing skin epithelial homeostasis, wound repair and squamous cancer. Throughout, we highlight common themes underscoring epithelial stem cell plasticity and tissue-level crosstalk in the context of skin physiology and pathology.
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Affiliation(s)
- Yinglu Guan
- Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Youn Joo Yang
- Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Priyadharsini Nagarajan
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Yejing Ge
- Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
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CRSP8 promotes thyroid cancer progression by antagonizing IKKα-induced cell differentiation. Cell Death Differ 2020; 28:1347-1363. [PMID: 33162555 PMCID: PMC8027816 DOI: 10.1038/s41418-020-00656-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 10/18/2020] [Accepted: 10/22/2020] [Indexed: 11/09/2022] Open
Abstract
CRSP8 plays an important role in recruiting mediators to genes through direct interaction with various DNA-bound transactivators. In this study, we uncovered the unique function of CRSP8 in suppressing thyroid cancer differentiation and promoting thyroid cancer progression via targeting IKKα signaling. CRSP8 was highly expressed in human thyroid cancer cells and tissues, especially in anaplastic thyroid cancer (ATC). Knockdown of CRSP8 suppressed cell growth, migration, invasion, stemness, and induced apoptosis and differentiation in ATC cells, while its overexpression displayed opposite effects in differentiated thyroid cancer (DTC) cells. Mechanistically, CRSP8 downregulated IKKα expression by binding to the IKKα promoter region (-257 to -143) to negatively regulate its transcription. Knockdown or overexpression of IKKα significantly reversed the expression changes of the differentiation and EMT-related markers and cell growth changes mediated by CRSP8 knockdown or overexpression in ATC or DTC cells. The in vivo study also validated that CRSP8 knockdown inhibited the growth of thyroid cancer by upregulating IKKα signaling in a mouse model of human ATC. Furthermore, we found that CRSP8 regulated the sensitivity of thyroid cancer cells to chemotherapeutics, including cisplatin and epirubicin. Collectively, our results demonstrated that CRSP8 functioned as a modulator of IKKα signaling and a suppressor of thyroid cancer differentiation, suggesting a potential therapeutic strategy for ATC by targeting CRSP8/IKKα pathway.
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Zhang H, Deng S, Zhang J, Zhu G, Zhou J, Ye W, Wang Q, Wang Y, Zou B, Zhang P, Zhang S, Lang J, Lu S. Single nucleotide polymorphisms within NFKBIA are associated with nasopharyngeal carcinoma susceptibility in Chinese Han population. Cytokine 2020; 138:155356. [PMID: 33160813 DOI: 10.1016/j.cyto.2020.155356] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 09/26/2020] [Accepted: 10/19/2020] [Indexed: 02/05/2023]
Abstract
Genes involved in latent membrane protein 1 (LMP1) signaling pathways have been suggested to play an important role in nasopharyngeal carcinogenesis. We investigated potentially functional genetic variants associated with the risk of nasopharyngeal carcinoma (NPC) in genes involved in the LMP1 signaling pathway. Altogether, 73 single nucleotide polymorphisms (SNPs) with MAF ≥ 10% were located within the regions of interest of the four genes TRAF3, NFKBIA, CHUK and MAP2K4. From these, 10 SNPs were selected for genotyping based on LD (r2 ≥ 0.80) in a hospital-based case-control study of 332 NPC cases and 585 healthy controls from the Chinese Han population. Minor allele carriers of the promoter SNP rs2233409 in NFKBIA, had an increased risk of NPC (AA vs GG: OR 7.14, 95%CI, 1.08-34.18, P = 0.04, dominant model). Based on the results, we concluded that rs2233409 polymorphism in NFKBIA may be moderately associated with the risk of NPC. Further studies with larger independent samples and functional analysis are needed to verify our results.
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Affiliation(s)
- Hanyi Zhang
- Department of Radiation Oncology, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Siyao Deng
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Jiayu Zhang
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Guiquan Zhu
- Department of Radiological Protection, Radiation Oncology Key Laboratory of Sichuan Province, Chengdu, China
| | - Jie Zhou
- Department of Radiation Oncology, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Wenjing Ye
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Qingwei Wang
- Sichuan Provincial Key Laboratory for Disease Gene Study and Department of Laboratory Medicine, Sichuan Academy of Medical Sciences and Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Yi Wang
- Sichuan Provincial Key Laboratory for Disease Gene Study and Department of Laboratory Medicine, Sichuan Academy of Medical Sciences and Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Bingwen Zou
- Department of Thoracic Oncology, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Chengdu, China
| | - Peng Zhang
- Department of Radiation Oncology, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Shichuan Zhang
- Department of Radiation Oncology, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Jinyi Lang
- Department of Radiation Oncology, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China; Department of Radiological Protection, Radiation Oncology Key Laboratory of Sichuan Province, Chengdu, China
| | - Shun Lu
- Department of Radiation Oncology, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China; Department of Radiological Protection, Radiation Oncology Key Laboratory of Sichuan Province, Chengdu, China.
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11
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Li Y, Tang L, Yue J, Gou X, Lin A, Weatherbee SD, Wu X. Regulation of epidermal differentiation through KDF1-mediated deubiquitination of IKKα. EMBO Rep 2020; 21:e48566. [PMID: 32239614 DOI: 10.15252/embr.201948566] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 02/20/2020] [Accepted: 03/06/2020] [Indexed: 11/09/2022] Open
Abstract
Progenitor cells at the basal layer of skin epidermis play an essential role in maintaining tissue homeostasis and enhancing wound repair in skin. The proliferation, differentiation, and cell death of epidermal progenitor cells have to be delicately regulated, as deregulation of this process can lead to many skin diseases, including skin cancers. However, the underlying molecular mechanisms involved in skin homeostasis remain poorly defined. In this study, with quantitative proteomics approach, we identified an important interaction between KDF1 (keratinocyte differentiation factor 1) and IKKα (IκB kinase α) in differentiating skin keratinocytes. Ablation of either KDF1 or IKKα in mice leads to similar but striking abnormalities in skin development, particularly in skin epidermal differentiation. With biochemical and mouse genetics approach, we further demonstrate that the interaction of IKKα and KDF1 is essential for epidermal differentiation. To probe deeper into the mechanisms, we find that KDF1 associates with a deubiquitinating protease USP7 (ubiquitin-specific peptidase 7), and KDF1 can regulate skin differentiation through deubiquitination and stabilization of IKKα. Taken together, our study unravels an important molecular mechanism underlying epidermal differentiation and skin tissue homeostasis.
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Affiliation(s)
- Yuanyuan Li
- Ben May Department for Cancer Research, The University of Chicago, Chicago, IL, USA
| | | | - Jiping Yue
- Ben May Department for Cancer Research, The University of Chicago, Chicago, IL, USA
| | - Xuewen Gou
- Ben May Department for Cancer Research, The University of Chicago, Chicago, IL, USA
| | - Anning Lin
- Ben May Department for Cancer Research, The University of Chicago, Chicago, IL, USA
| | | | - Xiaoyang Wu
- Ben May Department for Cancer Research, The University of Chicago, Chicago, IL, USA
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12
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Kylmä AK, Tolvanen TA, Carpén T, Haglund C, Mäkitie A, Mattila PS, Grenman R, Jouhi L, Sorsa T, Lehtonen S, Hagström J. Elevated TLR5 expression in vivo and loss of NF-κΒ activation via TLR5 in vitro detected in HPV-negative oropharyngeal squamous cell carcinoma. Exp Mol Pathol 2020; 114:104435. [PMID: 32240617 DOI: 10.1016/j.yexmp.2020.104435] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 03/24/2020] [Accepted: 03/28/2020] [Indexed: 12/26/2022]
Abstract
In oropharyngeal squamous cell carcinoma (OPSCC), the expression pattern of toll-like receptors (TLRs), in comparison between human papillomavirus (HPV)-positive and -negative tumors differs. TLRs control innate immune responses by activating, among others, the nuclear factor-κΒ (NF-κΒ) signaling pathway. Elevated NF-κΒ activity is detectable in several cancers and regulates cancer development and progression. We studied TLR5 expression in 143 unselected consecutive OPSCC tumors, and its relation to HPV-DNA and p16 status, clinicopathological parameters, and patient outcome, and studied TLR5 stimulation and consecutive NF-κB cascade activation in vitro in two human OPSCC cell lines and immortalized human keratinocytes (HaCat). Clinicopathological data came from hospital registries, and TLR5 immunoexpression was evaluated by immunohistochemistry. Flagellin served to stimulate TLR5 in cultured cells, followed by analysis of the activity of the NF-κB signaling cascade with In-Cell Western for IκΒ and p-IκΒ. High TLR5 expression was associated with poor disease-specific survival in HPV-positive OPSCC, which typically shows low TLR5 immunoexpression. High TLR5 immunoexpression was more common in HPV-negative OPSCC, known for its less-favorable prognosis. In vitro, we detected NF-κΒ cascade activation in the HPV-positive OPSCC cell line and in HaCat cells, but not in the HPV-negative OPSCC cell line. Our results suggest that elevated TLR5 immunoexpression may be related to reduced NF-κΒ activity in HPV-negative OPSCC. The possible prognosis-worsening mechanisms among these high-risk OPSCC patients however, require further evaluation.
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Affiliation(s)
- Anna Kaisa Kylmä
- Department of Pathology, University of Helsinki, HUSLAB and Helsinki University Hospital, P. O. Box 21, 00014 Helsinki, Finland.
| | - Tuomas Aleksi Tolvanen
- Department of Pathology, University of Helsinki, Research Program for Clinical and Molecular Metabolism, P. O. Box 21, 00014 Helsinki, Finland
| | - Timo Carpén
- Department of Pathology, University of Helsinki, HUSLAB and Helsinki University Hospital, P. O. Box 21, 00014 Helsinki, Finland; Department of Otorhinolaryngology - Head and Neck Surgery, University of Helsinki and Helsinki University Hospital, P. O. Box 263, 00029 Helsinki, Finland
| | - Caj Haglund
- Department of Surgery, University of Helsinki and Helsinki University Hospital, P. O. Box 20, FI-00014, Helsinki, Finland; Translational Cancer Medicine Research Program, Faculty of Medicine, University of Helsinki, P. O. Box 63, 00014 Helsinki, Finland
| | - Antti Mäkitie
- Department of Otorhinolaryngology - Head and Neck Surgery, University of Helsinki and Helsinki University Hospital, P. O. Box 263, 00029 Helsinki, Finland; Division of Ear, Nose and Throat Diseases, Department of Clinical Sciences, Intervention and Technology, Karolinska Institutet and Karolinska Hospital, Stockholm, Sweden; Research Programme in Systems Oncology, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Petri S Mattila
- Department of Otorhinolaryngology - Head and Neck Surgery, University of Helsinki and Helsinki University Hospital, P. O. Box 263, 00029 Helsinki, Finland
| | - Reidar Grenman
- Department of Otorhinolaryngology - Head and Neck Surgery, Department of Medical Biochemistry, Turku University Hospital, University of Turku, Kiinanmyllynkatu 4-8, P. O. Box 52, FI-20521 Turku, Finland
| | - Lauri Jouhi
- Department of Otorhinolaryngology - Head and Neck Surgery, University of Helsinki and Helsinki University Hospital, P. O. Box 263, 00029 Helsinki, Finland
| | - Timo Sorsa
- Department of Oral and Maxillofacial Diseases, University of Helsinki and Helsinki University Central Hospital, P. O. Box 41, 00014 Helsinki, Finland; Division of Periodontology, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
| | - Sanna Lehtonen
- Department of Pathology, University of Helsinki, Research Program for Clinical and Molecular Metabolism, P. O. Box 21, 00014 Helsinki, Finland
| | - Jaana Hagström
- Department of Pathology, University of Helsinki, HUSLAB and Helsinki University Hospital, P. O. Box 21, 00014 Helsinki, Finland; Department of Surgery, University of Helsinki and Helsinki University Hospital, P. O. Box 20, FI-00014, Helsinki, Finland; Department of Oral Pathology and Radiology, Institute of Dentistry, Faculty of Medicine, University of Turku, Turku, Finland
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13
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Wu Y, Shi T, Li J. NLRC5: A paradigm for NLRs in immunological and inflammatory reaction. Cancer Lett 2019; 451:92-99. [PMID: 30867141 DOI: 10.1016/j.canlet.2019.03.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 02/15/2019] [Accepted: 03/01/2019] [Indexed: 12/29/2022]
Abstract
The nucleotide-binding domain leucine-rich repeat containing (NLR) family of proteins is mainly involved in microbial pathogen recognition, inflammatory responses, and cell death. NLRC5, the largest member of the NLR family, is currently receiving an increasing level of attention. NLRC5 has been demonstrated to be a potent negative regulator of NF-κB signaling pathway-mediated inflammatory response. Moreover, accumulating evidence has indicated that NLRC5 is closely related to pathological processes of various cancers. In this review, we present an overview on NLRC5, addressing its underlying molecular mechanisms and implications in host defense, inflammatory response, and associated cancers.
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Affiliation(s)
- Yuting Wu
- The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, 230001, PR China; The Key Laboratory of Anti-inflammatory and Immune Medicine, Anhui Medical University, Ministry of Education, Hefei, Anhui, 230032, PR China.
| | - Tianlu Shi
- The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, 230001, PR China.
| | - Jun Li
- The Key Laboratory of Anti-inflammatory and Immune Medicine, Anhui Medical University, Ministry of Education, Hefei, Anhui, 230032, PR China.
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14
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Otkur W, Wang F, Liu W, Hayashi T, Tashiro SI, Onodera S, Ikejima T. Persistent IKKα phosphorylation induced apoptosis in UVB and Poly I:C co-treated HaCaT cells plausibly through pro-apoptotic p73 and abrogation of IκBα. Mol Immunol 2018; 104:69-78. [PMID: 30445257 DOI: 10.1016/j.molimm.2018.10.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 08/19/2018] [Accepted: 10/01/2018] [Indexed: 02/08/2023]
Abstract
Toll-like receptor 3 (TLR3), a member of pattern recognition receptors, is reported to initiate skin inflammation by recognizing double-strand RNA (dsRNA) released from UVB-irradiated cells. Recently, we have discovered the NF-κB pathway activated by TLR3 is involved in apoptosis of UVB-Poly I:C-treated HaCaT cells. The real culprit for apoptosis has not been precisely identified since the system of NF-κB pathway is complex. In this study, we silenced main transcriptional factors in NF-κB family, RelA, RelB and c-Rel, but to our surprise the results show that none of them participate in apoptosis induction in UVB-Poly I:C-treated HaCaT cells. Therefore, we moved to investigate the apoptosis-associated molecules in the upstream of NF-κB pathway. We firstly checked the expression of IκBα, an NF-κB inhibitor. UVB (4.8 mJ/cm2) and Poly I:C (0.3 μg/mL) co-treatment decreased IκBα expression level in a time-dependent manner. Silencing IκBα with siRNA further enhanced UVB-Poly I:C-induced cell death. We then investigated IκB kinase (IKK) complex that contributes to the degradation of IκBα. IKK is composed of IKKα, IKKβ and NEMO. Treatment with IKK-16, an IKKα/β inhibitor, significantly diminished UVB-Poly I:C-induced IκBα degradation and thus apoptosis. Silencing either IKKα or NEMO but not IKKβ with corresponding siRNA inhibited apoptosis. Tumor repressor p73, a homologue of p53, is reported to mediate IKKα-induced apoptosis in DNA damage response. Silencing p73 reduced cell apoptosis in UVB-Poly I:C-treated HaCaT cells. In summary, UVB and Poly I:C co-treatment activates IKKα and NEMO, which diminishes anti-apoptotic IκBα, resulting in enhancement of apoptosis through p73. The findings partially clarify the possible molecular mechanism of pro-apoptotic NF-κB pathway activated by TLR3 in the fate of UVB-irradiated epidermis.
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Affiliation(s)
- Wuxiyar Otkur
- China-Japan Research Institute of Medical and Pharmaceutical Sciences, Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Fang Wang
- China-Japan Research Institute of Medical and Pharmaceutical Sciences, Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Weiwei Liu
- China-Japan Research Institute of Medical and Pharmaceutical Sciences, Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Toshihiko Hayashi
- China-Japan Research Institute of Medical and Pharmaceutical Sciences, Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, 110016, China; Department of Chemistry and Life Science, School of Advanced Engineering, Kogakuin University, 2665-1, Nakanomachi, Hachioji, Tokyo, 192-0015, Japan
| | - Shin-Ichi Tashiro
- Department of Medical Education & Primary Care, Kyoto Prefectural University of Medicine, Kajiicho 465, Kamikyo-ku, Kyoto City, Kyoto, 602-8566, Japan
| | - Satoshi Onodera
- Department of Clinical and Pharmaceutical Sciences, Showa Pharmaceutical University, Tokyo, 194-8543, Japan
| | - Takashi Ikejima
- China-Japan Research Institute of Medical and Pharmaceutical Sciences, Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, 110016, China.
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15
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Macrophage inducible nitric oxide synthase promotes the initiation of lung squamous cell carcinoma by maintaining circulated inflammation. Cell Death Dis 2018; 9:642. [PMID: 29844374 PMCID: PMC5973934 DOI: 10.1038/s41419-018-0653-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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16
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Göktuna SI, Diamanti MA, Chau TL. IKK
s and tumor cell plasticity. FEBS J 2018; 285:2161-2181. [DOI: 10.1111/febs.14444] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 02/22/2018] [Accepted: 03/21/2018] [Indexed: 12/13/2022]
Affiliation(s)
- Serkan I. Göktuna
- Department of Molecular Biology and Genetics Bilkent University Ankara Turkey
- National Nanotechnology Research Center (UNAM) Bilkent University Ankara Turkey
| | - Michaela A. Diamanti
- Georg‐Speyer‐Haus Institute for Tumor Biology and Experimental Therapy Frankfurt am Main Germany
| | - Tieu Lan Chau
- Department of Molecular Biology and Genetics Bilkent University Ankara Turkey
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17
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Wang X, Gray Z, Willette-Brown J, Zhu F, Shi G, Jiang Q, Song NY, Dong L, Hu Y. Macrophage inducible nitric oxide synthase circulates inflammation and promotes lung carcinogenesis. Cell Death Discov 2018; 4:46. [PMID: 29844930 PMCID: PMC5967330 DOI: 10.1038/s41420-018-0046-5] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 02/13/2018] [Accepted: 02/28/2018] [Indexed: 12/26/2022] Open
Abstract
Human lung squamous cell carcinoma (SCC) is highly associated with increased pulmonary macrophage infiltration. Previously, we showed that marked pulmonary infiltrating macrophages were required for spontaneous lung SCC development in a mouse model (L-IkkαKA/KA, KA/KA) that resembles human lung SCC. Interestingly the lung SCC-associated macrophages specifically express elevated inducible nitric oxide synthase (NOS2). However, the role of macrophage NOS2 in lung carcinogenesis has not been explored. Here, we show that NOS2 ablation inhibits macrophage infiltration, fibrosis, and SCC development in the lungs of KA/KA mice. Macrophage NOS2 was found to circulate inflammation and enhance macrophage migration and survival. NOS2 promotes foamy macrophage formation characterized with impaired lipid metabolism. NOS2 null bone marrow transplantation reduces foamy macrophage numbers and carcinogenesis in KA/KA chimaeras. This finding sheds light on a new mechanism by which macrophage NOS2 increases pulmonary inflammatory responses and macrophage survival and impairs macrophage lipid metabolism, thereby promoting lung SCC formation.
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Affiliation(s)
- Xin Wang
- 1Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MA 21701 USA.,4The Respiratory Department, Jinan Central Hospital Affiliated to Shandong University, Jinan, Shandong 250013 China
| | - Zane Gray
- 1Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MA 21701 USA
| | - Jami Willette-Brown
- 1Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MA 21701 USA
| | - Feng Zhu
- 1Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MA 21701 USA
| | - Gongping Shi
- 1Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MA 21701 USA
| | - Qun Jiang
- 2Thoracic and Gastrointestinal Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892 USA
| | - Na-Young Song
- 1Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MA 21701 USA
| | - Liang Dong
- 3Department of Respiratory Medicine, Qilu Hospital of Shandong University, 107#, Wenhua Xi Road, Jinan, 250012 Shandong China
| | - Yinling Hu
- 1Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MA 21701 USA
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18
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Zhu F, Hu Y. Integrity of IKK/NF-κB Shields Thymic Stroma That Suppresses Susceptibility to Autoimmunity, Fungal Infection, and Carcinogenesis. Bioessays 2018. [PMID: 29522649 DOI: 10.1002/bies.201700131] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A pathogenic connection between autoreactive T cells, fungal infection, and carcinogenesis has been demonstrated in studies of human autoimmune polyendocrinopathy-candidiasis-ectodermal dystrophy (APECED) as well as in a mouse model in which kinase-dead Ikkα knock-in mice develop impaired central tolerance, autoreactive T cell-mediated autoimmunity, chronic fungal infection, and esophageal squamous cell carcinoma, which recapitulates APECED. IκB kinase α (IKKα) is one subunit of the IKK complex required for NF-κB activation. IKK/NF-κB is essential for central tolerance establishment by regulating the development of medullary thymic epithelial cells (mTECs) that facilitate the deletion of autoreactive T cells in the thymus. In this review, we extensively discuss the pathogenic roles of inborn errors in the IKK/NF-κB loci in the phenotypically related diseases APECED, immune deficiency syndrome, and severe combined immunodeficiency; differentiate how IKK/NF-κB components, through mTEC (stroma), T cells/leukocytes, or epithelial cells, contribute to the pathogenesis of infectious diseases, autoimmunity, and cancer; and highlight the medical significance of IKK/NF-κB in these diseases.
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Affiliation(s)
- Feng Zhu
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, 21701, Maryland, USA
| | - Yinling Hu
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, 21701, Maryland, USA
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19
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Bayart CB, Ishak GE, Finn LS, Lee A, Baran F, Sun A, Gupta D, Vitanza NA. Pilocytic astrocytoma with leptomeningeal spread in a patient with incontinentia pigmenti presenting with unilateral nystagmus. Pediatr Blood Cancer 2018; 65. [PMID: 29171168 DOI: 10.1002/pbc.26886] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 08/28/2017] [Accepted: 10/10/2017] [Indexed: 01/26/2023]
Abstract
Incontinentia pigmenti (IP) is a genetic disorder caused by mutations in IKBKG, leading to functional loss of nuclear factor kappa B (NF-ĸB). We report the case of a 6-month-old female child with IP who presented with unilateral nystagmus and was found to have a pilocytic astrocytoma with leptomeningeal spread. Enhanced understanding of the relationship between NF-ĸB, along with its upstream regulators, and tumorigenesis may shed light on whether a subset of patients with IP may be at increased risk for neoplasia.
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Affiliation(s)
- Cheryl B Bayart
- Division of Dermatology, Department of Pediatrics, Seattle Children's Hospital, University of Washington School of Medicine, Seattle, Washington
| | - Gisele E Ishak
- Department of Radiology, Seattle Children's Hospital, University of Washington School of Medicine, Seattle, Washington
| | - Laura S Finn
- Division of Pathology, Department of Pediatrics, Seattle Children's Hospital, University of Washington School of Medicine, Seattle, Washington
| | - Amy Lee
- Department of Neurological Surgery, Seattle Children's Hospital, University of Washington School of Medicine, Seattle, Washington
| | - Francine Baran
- Division of Ophthalmology, Department of Pediatrics, Seattle Children's Hospital, University of Washington School of Medicine, Seattle, Washington
| | - Angela Sun
- Division of Biochemical Genetics, Department of Pediatrics, Seattle Children's Hospital, University of Washington School of Medicine, Seattle, Washington
| | - Deepti Gupta
- Division of Dermatology, Department of Pediatrics, Seattle Children's Hospital, University of Washington School of Medicine, Seattle, Washington
| | - Nicholas A Vitanza
- Division of Hematology/Oncology, Department of Pediatrics, Seattle Children's Hospital, University of Washington School of Medicine, Fred Hutchinson Cancer Research Center, Seattle, Washington
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20
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Zeng Q, Chen X, Ning C, Zhu Q, Yao Y, Zhao Y, Luan F. Methylation of the genes ROD1, NLRC5, and HKR1 is associated with aging in Hainan centenarians. BMC Med Genomics 2018; 11:7. [PMID: 29394898 PMCID: PMC5797414 DOI: 10.1186/s12920-018-0334-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Accepted: 01/25/2018] [Indexed: 12/18/2022] Open
Abstract
Background Human aging is a hot topic in biology, and it has been associated with DNA methylation changes at specific genomic sites. We aimed to study the changes of DNA methylation at a single-CpG-site resolution using peripheral blood samples from centenarians. Methods Using Illumina 450 K Methylation BeadChip microarray assays, we carried out a pool-based, epigenome-wide investigation of DNA methylation of blood samples from 12 centenarians and 12 healthy controls. Differentially methylated cytosine-phosphate-guanosine (CpG) sites were selected for further pyrosequencing analysis of blood samples from 30 centenarians and 30 healthy controls. Result We identified a total of 31 high-confidence CpG sites with differential methylation profiles between the groups: 9 (29%) were hypermethylated and 22 (71%) were hypomethylated in centenarians. It was also found that hypermethylation of HKR1 and hypomethylation of ROD1 and NLRC5 genes strongly correlated with age in centenarians. Conclusion Our results indicate that the methylation profile combination of HKR1, ROD1, and NLRC5 could be a promising biomarker for aging in Hainan centenarians. Electronic supplementary material The online version of this article (10.1186/s12920-018-0334-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Qian Zeng
- Hainan branch of PLA General Hospital, Sanya, 572000, China
| | - Xiaoping Chen
- Hainan branch of PLA General Hospital, Sanya, 572000, China
| | - Chaoxue Ning
- Hainan branch of PLA General Hospital, Sanya, 572000, China
| | - Qiao Zhu
- Hainan branch of PLA General Hospital, Sanya, 572000, China
| | - Yao Yao
- Hainan branch of PLA General Hospital, Sanya, 572000, China
| | - Yali Zhao
- Hainan branch of PLA General Hospital, Sanya, 572000, China.
| | - Fuxin Luan
- Hainan branch of PLA General Hospital, Sanya, 572000, China.
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21
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Alameda JP, Gaspar M, Ramírez Á, Navarro M, Page A, Suárez-Cabrera C, Fernández MG, Mérida JR, Paramio JM, García-Fernández RA, Fernández-Aceñero MJ, Casanova ML. Deciphering the role of nuclear and cytoplasmic IKKα in skin cancer. Oncotarget 2018; 7:29531-47. [PMID: 27121058 PMCID: PMC5045415 DOI: 10.18632/oncotarget.8792] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Accepted: 03/28/2016] [Indexed: 02/05/2023] Open
Abstract
Nonmelanoma skin cancers (NMSC) are the most common human malignancies. IKKα is an essential protein for skin development and is also involved in the genesis and progression of NMSC, through mechanisms not fully understood. While different studies show that IKKα protects against skin cancer, others indicate that it promotes NMSC. To resolve this controversy we have generated two models of transgenic mice expressing the IKKα protein in the nucleus (N-IKKα mice) or the cytoplasm (C-IKKα mice) of keratinocytes. Chemical skin carcinogenesis experiments show that tumors developed by both types of transgenic mice exhibit histological and molecular characteristics that make them more prone to progression and invasion than those developed by Control mice. However, the mechanisms through which IKKα promotes skin tumors are different depending on its subcellular localization; while IKKα of cytoplasmic localization increases EGFR, MMP-9 and VEGF-A activities in tumors, nuclear IKKα causes tumor progression through regulation of c-Myc, Maspin and Integrin-α6 expression. Additionally, we have found that N-IKKα skin tumors mimic the characteristics associated to aggressive human skin tumors with high risk to metastasize. Our results show that IKKα has different non-overlapping roles in the nucleus or cytoplasm of keratinocytes, and provide new targets for intervention in human NMSC progression.
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Affiliation(s)
- Josefa P Alameda
- Molecular Oncology Unit, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain.,Molecular Oncology, Institute of Biomedical Investigation University Hospital "12 de Octubre", 28041 Madrid, Spain
| | - Miriam Gaspar
- Molecular Oncology Unit, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain
| | - Ángel Ramírez
- Molecular Oncology Unit, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain.,Molecular Oncology, Institute of Biomedical Investigation University Hospital "12 de Octubre", 28041 Madrid, Spain
| | - Manuel Navarro
- Molecular Oncology Unit, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain.,Molecular Oncology, Institute of Biomedical Investigation University Hospital "12 de Octubre", 28041 Madrid, Spain
| | - Angustias Page
- Molecular Oncology Unit, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain.,Molecular Oncology, Institute of Biomedical Investigation University Hospital "12 de Octubre", 28041 Madrid, Spain
| | - Cristian Suárez-Cabrera
- Molecular Oncology Unit, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain.,Molecular Oncology, Institute of Biomedical Investigation University Hospital "12 de Octubre", 28041 Madrid, Spain
| | - M Guadalupe Fernández
- Department of Human Anatomy and Embriology, Facultad de Medicina, UCM, 28040 Madrid, Spain
| | - Jose R Mérida
- Department of Human Anatomy and Embriology, Facultad de Medicina, UCM, 28040 Madrid, Spain
| | - Jesús M Paramio
- Molecular Oncology Unit, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain.,Molecular Oncology, Institute of Biomedical Investigation University Hospital "12 de Octubre", 28041 Madrid, Spain
| | - Rosa A García-Fernández
- Department of Animal Medicine and Surgery, Facultad de Veterinaria, UCM, 28040 Madrid, Spain
| | | | - M Llanos Casanova
- Molecular Oncology Unit, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain.,Molecular Oncology, Institute of Biomedical Investigation University Hospital "12 de Octubre", 28041 Madrid, Spain
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Page A, Bravo A, Suarez-Cabrera C, Alameda JP, Casanova ML, Lorz C, Segrelles C, Segovia JC, Paramio JM, Navarro M, Ramirez A. IKKβ-Mediated Resistance to Skin Cancer Development Is Ink4a/Arf-Dependent. Mol Cancer Res 2017; 15:1255-1264. [PMID: 28584022 DOI: 10.1158/1541-7786.mcr-17-0157] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 05/12/2017] [Accepted: 05/25/2017] [Indexed: 11/16/2022]
Abstract
IKKβ (encoded by IKBKB) is a protein kinase that regulates the activity of numerous proteins important in several signaling pathways, such as the NF-κB pathway. IKKβ exerts a protumorigenic role in several animal models of lung, hepatic, intestinal, and oral cancer. In addition, genomic and proteomic studies of human tumors also indicate that IKBKB gene is amplified or overexpressed in multiple tumor types. Here, the relevance of IKKβ in skin cancer was determined by performing carcinogenesis studies in animal models overexpressing IKKβ in the basal skin layer. IKKβ overexpression resulted in a striking resistance to skin cancer development and an increased expression of several tumor suppressor proteins, such as p53, p16, and p19. Mechanistically, this skin tumor-protective role of IKKβ is independent of p53, but dependent on the activity of the Ink4a/Arf locus. Interestingly, in the absence of p16 and p19, IKKβ-increased expression favors the appearance of cutaneous spindle cell-like squamous cell carcinomas, which are highly aggressive tumors. These results reveal that IKKβ activity prevents skin tumor development, and shed light on the complex nature of IKKβ effects on cancer progression, as IKKβ can both promote and prevent carcinogenesis depending on the cell type or molecular context.Implications: The ability of IKKβ to promote or prevent carcinogenesis suggests the need for further evaluation when targeting this protein. Mol Cancer Res; 15(9); 1255-64. ©2017 AACR.
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Affiliation(s)
- Angustias Page
- Molecular Oncology Unit, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
- Cell and Molecular Oncology Group, Institute of Biomedical Research, Universitary Hospital 12 de Octubre, Madrid, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Spain
| | - Ana Bravo
- Department of Anatomy, Animal Production and Veterinary Clinical Sciences, Faculty of Veterinary Medicine, University of Santiago de Compostela, Lugo, Spain
| | - Cristian Suarez-Cabrera
- Molecular Oncology Unit, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
- Cell and Molecular Oncology Group, Institute of Biomedical Research, Universitary Hospital 12 de Octubre, Madrid, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Spain
| | - Josefa P Alameda
- Molecular Oncology Unit, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
- Cell and Molecular Oncology Group, Institute of Biomedical Research, Universitary Hospital 12 de Octubre, Madrid, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Spain
| | - M Llanos Casanova
- Molecular Oncology Unit, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
- Cell and Molecular Oncology Group, Institute of Biomedical Research, Universitary Hospital 12 de Octubre, Madrid, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Spain
| | - Corina Lorz
- Molecular Oncology Unit, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
- Cell and Molecular Oncology Group, Institute of Biomedical Research, Universitary Hospital 12 de Octubre, Madrid, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Spain
| | - Carmen Segrelles
- Molecular Oncology Unit, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
- Cell and Molecular Oncology Group, Institute of Biomedical Research, Universitary Hospital 12 de Octubre, Madrid, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Spain
| | - José C Segovia
- Hematopoietic Innovative Therapies Division. Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Centro de Investigaciones Biomédicas en Red de Enfermedades Raras (CIBERER), Spain
- Advanced Therapies Mixed Unit, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz (IIS-FJD), Madrid, Spain
| | - Jesús M Paramio
- Molecular Oncology Unit, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
- Cell and Molecular Oncology Group, Institute of Biomedical Research, Universitary Hospital 12 de Octubre, Madrid, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Spain
| | - Manuel Navarro
- Molecular Oncology Unit, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
- Cell and Molecular Oncology Group, Institute of Biomedical Research, Universitary Hospital 12 de Octubre, Madrid, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Spain
| | - Angel Ramirez
- Molecular Oncology Unit, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain.
- Cell and Molecular Oncology Group, Institute of Biomedical Research, Universitary Hospital 12 de Octubre, Madrid, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Spain
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Zhu F, Willette-Brown J, Song NY, Lomada D, Song Y, Xue L, Gray Z, Zhao Z, Davis SR, Sun Z, Zhang P, Wu X, Zhan Q, Richie ER, Hu Y. Autoreactive T Cells and Chronic Fungal Infection Drive Esophageal Carcinogenesis. Cell Host Microbe 2017; 21:478-493.e7. [PMID: 28407484 PMCID: PMC5868740 DOI: 10.1016/j.chom.2017.03.006] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 01/30/2017] [Accepted: 03/09/2017] [Indexed: 12/12/2022]
Abstract
Humans with autoimmune polyendocrinopathy-candidiasis-ectodermal dystrophy (APECED), a T cell-driven autoimmune disease caused by impaired central tolerance, are susceptible to chronic fungal infection and esophageal squamous cell carcinoma (ESCC). However, the relationship between autoreactive T cells and chronic fungal infection in ESCC development remains unclear. We find that kinase-dead Ikkα knockin mice develop APECED-like phenotypes, including impaired central tolerance, autoreactive T cells, chronic fungal infection, and ESCCs expressing specific human ESCC markers. Using this model, we investigated the link between ESCC and fungal infection. Autoreactive CD4 T cells permit fungal infection and incite tissue injury and inflammation. Antifungal treatment or autoreactive CD4 T cell depletion rescues, whereas oral fungal administration promotes, ESCC development. Inhibition of inflammation or epidermal growth factor receptor (EGFR) activity decreases fungal burden. Fungal infection is highly associated with ESCCs in non-autoimmune human patients. Therefore, autoreactive T cells and chronic fungal infection, fostered by inflammation and epithelial injury, promote ESCC development.
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Affiliation(s)
- Feng Zhu
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, USA
| | - Jami Willette-Brown
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, USA
| | - Na-Young Song
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, USA
| | - Dakshayani Lomada
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Smithville, TX 78957, USA
| | - Yongmei Song
- State Key Laboratory of Molecular Oncology, Cancer Institute and Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Liyan Xue
- Department of Pathology, Cancer Institute and Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Zane Gray
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, USA
| | - Zitong Zhao
- State Key Laboratory of Molecular Oncology, Cancer Institute and Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Sean R Davis
- Genetics Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Zhonghe Sun
- Laboratory of Molecular Technology, Leidos Biomedical Research, Inc., Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA
| | | | - Xiaolin Wu
- Laboratory of Molecular Technology, Leidos Biomedical Research, Inc., Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA
| | - Qimin Zhan
- State Key Laboratory of Molecular Oncology, Cancer Institute and Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Ellen R Richie
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Smithville, TX 78957, USA
| | - Yinling Hu
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, USA.
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24
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Lisse TS, Rieger S. IKKα regulates human keratinocyte migration through surveillance of the redox environment. J Cell Sci 2017; 130:975-988. [PMID: 28122935 PMCID: PMC5358334 DOI: 10.1242/jcs.197343] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Accepted: 01/16/2017] [Indexed: 02/06/2023] Open
Abstract
Although the functions of H2O2 in epidermal wound repair are conserved throughout evolution, the underlying signaling mechanisms are largely unknown. In this study we used human keratinocytes (HEK001) to investigate H2O2-dependent wound repair mechanisms. Scratch wounding led to H2O2 production in two or three cell layers at the wound margin within ∼30 min and subsequent cysteine modification of proteins via sulfenylation. Intriguingly, exogenous H2O2 treatment resulted in preferential sulfenylation of keratinocytes that adopted a migratory phenotype and detached from neighboring cells, suggesting that one of the primary functions of H2O2 is to stimulate signaling factors involved in cell migration. Based on previous findings that revealed epidermal growth factor receptor (EGFR) involvement in H2O2-dependent cell migration, we analyzed oxidation of a candidate upstream target, the inhibitor of κB kinase α (IKKα; encoded by CHUK), as a mechanism of action. We show that IKKα is sulfenylated at a conserved cysteine residue in the kinase domain, which correlates with de-repression of EGF promoter activity and increased EGF expression. Thus, this indicates that IKKα promotes migration through dynamic interactions with the EGF promoter depending on the redox state within cells. Summary: This study provides a newly identified mechanism by which H2O2-dependent oxidation of the inhibitor of κB kinase α and de-repression of epidermal growth factor promoter activity stimulates keratinocyte migration.
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Affiliation(s)
- Thomas S Lisse
- Davis Center for Regenerative Biology and Medicine, MDI Biological Laboratory, 159 Old Bar Harbor Road, Salisbury Cove, ME 04672, USA .,The Jackson Laboratory, Bar Harbor, ME 04609, USA
| | - Sandra Rieger
- Davis Center for Regenerative Biology and Medicine, MDI Biological Laboratory, 159 Old Bar Harbor Road, Salisbury Cove, ME 04672, USA
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25
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The IKKα-dependent non-canonical pathway of NF-κB activation is constitutively active and modulates progression-related functions in a subset of human melanomas. Arch Dermatol Res 2016; 308:733-742. [DOI: 10.1007/s00403-016-1696-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2016] [Revised: 09/14/2016] [Accepted: 10/10/2016] [Indexed: 01/13/2023]
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26
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Differentiation therapy: a promising strategy for cancer treatment. CHINESE JOURNAL OF CANCER 2016; 35:3. [PMID: 26739838 PMCID: PMC4704415 DOI: 10.1186/s40880-015-0059-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2015] [Accepted: 09/09/2015] [Indexed: 12/29/2022]
Abstract
Poor differentiation is an important hallmark of cancer cells, and differentiation therapy holds great promise for cancer treatment. The restoration of IkB kinase α (IKKα) leads to the differentiation of nasopharyngeal carcinoma cells with reduced tumorigenicity. The findings by Yan et al. validate the polycomb protein enhancer of zeste homologue 2 (EZH2) as a target for intervention.
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27
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Hu Y. A feedforward loop of NLRC5 (de)ubiquitination keeps IKK-NF-κB in check. J Cell Biol 2015; 211:941-3. [PMID: 26620908 PMCID: PMC4674284 DOI: 10.1083/jcb.201511039] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Accepted: 11/16/2015] [Indexed: 11/22/2022] Open
Abstract
Many receptors signal via adaptors to the IKK-NF-κB axis, transducing extracellular cues to transcriptional regulation. In this issue, Meng et al. (2015. J. Cell Biol. http://dx.doi.org/10.1083/jcb.201505091) reveal that the IKK regulator NLRC5 shapes NF-κB activity through a feedforward loop of NLRC5 ubiquitination and deubiquitination, highlighting a new pathway modulating IKK-NF-κB activity.
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Affiliation(s)
- Yinling Hu
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21701
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28
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XIE YUXIN, XIE KEQI, GOU QIHENG, CHEN NIANYONG. IκB kinase α functions as a tumor suppressor in epithelial-derived tumors through an NF-κB-independent pathway (Review). Oncol Rep 2015; 34:2225-32. [DOI: 10.3892/or.2015.4229] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Accepted: 07/06/2015] [Indexed: 11/06/2022] Open
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29
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Toll A, Margalef P, Masferrer E, Ferrándiz-Pulido C, Gimeno J, Pujol RM, Bigas A, Espinosa L. Active nuclear IKK correlates with metastatic risk in cutaneous squamous cell carcinoma. Arch Dermatol Res 2015; 307:721-9. [PMID: 26094020 DOI: 10.1007/s00403-015-1579-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Revised: 05/07/2015] [Accepted: 05/17/2015] [Indexed: 12/22/2022]
Abstract
About 5% of all cutaneous squamous cell carcinomas (cSCCs) metastasize, which is the principal cause of death by this type of cancer. However, to date there are no reliable biomarkers that categorize those SCC patients that will progress to metastasis. Nuclear active IKKα diminishes Maspin levels in prostate cancer facilitating its metastatic potential. In this paper, we describe the immunohistochemical analysis of active IKK and Maspin in 56 metastasizing and 51 non-metastasizing primary cSCC to measure their association with cancer behaviour. We also determined the effect of inhibiting IKK activity in SCC cell growth and migration in vitro. We found that high levels of nuclear active IKK in the primary tumour are predictive of cSCC metastatic capacity, in particular when combined with poor tumour differentiation and a history of tumour recurrence. Active IKK inversely correlated with Maspin levels in cSCC tumours, and samples negative for Maspin are exclusively found in the metastatic group. Mechanistically, IKK activity regulates cellular motility and SCC cell survival. Our results indicate that nuclear active IKK is a robust biomarker to predict cSCC outcome, and suggest the possibility of targeting IKK activity as a future therapy for treating metastatic cSCC.
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Affiliation(s)
- Agusti Toll
- Department of Dermatology, Hospital del Mar, Parc de Salut Mar, Barcelona, Spain.
| | - Pol Margalef
- Stem Cells and Cancer Research Laboratory, Institut Hospital del Mar Investigacions Mèdiques (IMIM), Barcelona, Spain
- Francis Crick Institute, Clare Hall Laboratory, Blanche Lane, South Mimms, EN6 3LD, Hertfordshire, UK
| | - Emili Masferrer
- Department of Dermatology, Hospital del Mar, Parc de Salut Mar, Barcelona, Spain
| | | | - Javier Gimeno
- Pathology Department, Parc de Salut Mar. Hospital del Mar, Barcelona, Spain
| | - Ramon Maria Pujol
- Department of Dermatology, Hospital del Mar, Parc de Salut Mar, Barcelona, Spain
| | - Anna Bigas
- Stem Cells and Cancer Research Laboratory, Institut Hospital del Mar Investigacions Mèdiques (IMIM), Barcelona, Spain
| | - Lluis Espinosa
- Stem Cells and Cancer Research Laboratory, Institut Hospital del Mar Investigacions Mèdiques (IMIM), Barcelona, Spain
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30
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IKKα negatively regulates ASC-dependent inflammasome activation. Nat Commun 2014; 5:4977. [PMID: 25266676 PMCID: PMC4298287 DOI: 10.1038/ncomms5977] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Accepted: 08/12/2014] [Indexed: 02/07/2023] Open
Abstract
The inflammasomes are multiprotein complexes that activate caspase-1 in response to infections and stress, resulting in the secretion of pro-inflammatory cytokines. Here we report that IKKα is a critical negative regulator of ASC-dependent inflammasomes. IKKα controls the inflammasome at the level of the adaptor ASC, which interacts with IKKα in the nucleus of resting macrophages in an IKKα kinase-dependent manner. Loss of IKKα kinase activity results in inflammasome hyperactivation. Mechanistically, the downstream nuclear effector IKKi facilitates translocation of ASC from the nucleus to the perinuclear area during inflammasome activation. ASC remains under the control of IKKα in the perinuclear area following translocation of the ASC/IKKα complex. Signal 2 of NLRP3 activation leads to inhibition of IKKα kinase activity through the recruitment of PP2A, allowing ASC to participate in NLRP3 inflammasome assembly. Taken together, these findings reveal a IKKi-IKKα-ASC axis that serves as a common regulatory mechanism for ASC-dependent inflammasomes.
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31
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Espinosa L, Bigas A, Mulero MC. Novel functions of chromatin-bound IκBα in oncogenic transformation. Br J Cancer 2014; 111:1688-92. [PMID: 25233399 PMCID: PMC4453743 DOI: 10.1038/bjc.2014.84] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Revised: 11/19/2013] [Accepted: 01/24/2014] [Indexed: 01/30/2023] Open
Abstract
The nuclear factor-κB (NF-κB) signalling pathway participates in a multitude of biological processes, which imply the requirement of a complex and precise regulation. IκB (for Inhibitor of kappaB) proteins, which bind and retain NF-κB dimers in the cytoplasm, are the main contributors to negative regulation of NF-κB under non-stimulation conditions. Nevertheless, increasing evidences indicate that IκB proteins exert specific nuclear roles that directly contribute to the control of gene transcription. In particular, hypophosphorylated IκBβ can bind the promoter region of TNFα leading to persistent gene transcription in macrophages and contributing to the regulation of the inflammatory response. Recently, we demonstrated that phosphorylated and SUMOylated IκBα reside in the nucleus of the cells where it binds to chromatin leading to specific transcriptional repression. Mechanistically, IκBα associates and regulates Polycomb Repressor Complex activity, a function that is evolutionary conserved from flies to mammals, as indicate the homeotic phenotype of Drosophila mutants. Here we discuss the implications of chromatin-bound IκBα function in the context of tumorigenesis.
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Affiliation(s)
- L Espinosa
- Program in Cancer Research, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Doctor Aiguader, 88, Barcelona 08003, Spain
| | - A Bigas
- Program in Cancer Research, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Doctor Aiguader, 88, Barcelona 08003, Spain
| | - M C Mulero
- Program in Cancer Research, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Doctor Aiguader, 88, Barcelona 08003, Spain
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32
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Kraft S, Granter SR. Molecular pathology of skin neoplasms of the head and neck. Arch Pathol Lab Med 2014; 138:759-87. [PMID: 24878016 DOI: 10.5858/arpa.2013-0157-ra] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
CONTEXT Skin neoplasms include the most common malignancies affecting humans. Many show an ultraviolet (UV)-induced pathogenesis and often affect the head and neck region. OBJECTIVE To review literature on cutaneous neoplasms that show a predilection for the head and neck region and that are associated with molecular alterations. DATA SOURCES Literature review. CONCLUSIONS Common nonmelanoma skin cancers, such as basal and squamous cell carcinomas, show a UV-induced pathogenesis. Basal cell carcinomas are characterized by molecular alterations of the Hedgehog pathway, affecting patched and smoothened genes. While squamous cell carcinomas show UV-induced mutations in several genes, driver mutations are only beginning to be identified. In addition, certain adnexal neoplasms also predominantly affect the head and neck region and show interesting, recently discovered molecular abnormalities, or are associated with hereditary conditions whose molecular genetic pathogenesis is well understood. Furthermore, recent advances have led to an increased understanding of the molecular pathogenesis of melanoma. Certain melanoma subtypes, such as lentigo maligna melanoma and desmoplastic melanoma, which are more often seen on the chronically sun-damaged skin of the head and neck, show differences in their molecular signature when compared to the other more common subtypes, such as superficial spreading melanoma, which are more prone to occur at sites with acute intermittent sun damage. In summary, molecular alterations in cutaneous neoplasms of the head and neck are often related to UV exposure. Their molecular footprint often reflects the histologic tumor type, and familiarity with these changes will be increasingly necessary for diagnostic and therapeutic considerations.
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Affiliation(s)
- Stefan Kraft
- From the Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts (Dr Kraft); and the Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts (Dr Granter)
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33
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Espinosa L, Margalef P, Bigas A. Non-conventional functions for NF-κB members: the dark side of NF-κB. Oncogene 2014; 34:2279-87. [DOI: 10.1038/onc.2014.188] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 05/19/2014] [Accepted: 05/23/2014] [Indexed: 02/07/2023]
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34
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Costanzo A, Pediconi N, Narcisi A, Guerrieri F, Belloni L, Fausti F, Botti E, Levrero M. TP63 and TP73 in cancer, an unresolved "family" puzzle of complexity, redundancy and hierarchy. FEBS Lett 2014; 588:2590-9. [PMID: 24983500 DOI: 10.1016/j.febslet.2014.06.047] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Revised: 06/16/2014] [Accepted: 06/16/2014] [Indexed: 12/24/2022]
Abstract
TP53 belongs to a small gene family that includes, in mammals, two additional paralogs, TP63 and TP73. The p63 and p73 proteins are structurally and functionally similar to p53 and their activity as transcription factors is regulated by a wide repertoire of shared and unique post-translational modifications and interactions with regulatory cofactors. p63 and p73 have important functions in embryonic development and differentiation but are also involved in tumor suppression. The biology of p63 and p73 is complex since both TP63 and TP73 genes are transcribed into a variety of different isoforms that give rise to proteins with antagonistic properties, the TA-isoforms that act as tumor-suppressors and DN-isoforms that behave as proto-oncogenes. The p53 family as a whole behaves as a signaling "network" that integrates developmental, metabolic and stress signals to control cell metabolism, differentiation, longevity, proliferation and death. Despite the progress of our knowledge, the unresolved puzzle of complexity, redundancy and hierarchy in the p53 family continues to represent a formidable challenge.
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Affiliation(s)
- Antonio Costanzo
- Dermatology Unit, Department of Neuroscience, Mental Health and Sensory Organs (NESMOS), Sapienza University of Rome, Italy
| | - Natalia Pediconi
- Laboratory of Molecular Oncology, Department of Molecular Medicine, Sapienza University of Rome, Italy; Center for Life Nanosciences (CNLS) - IIT/Sapienza, Rome, Italy
| | - Alessandra Narcisi
- Dermatology Unit, Department of Neuroscience, Mental Health and Sensory Organs (NESMOS), Sapienza University of Rome, Italy
| | - Francesca Guerrieri
- Center for Life Nanosciences (CNLS) - IIT/Sapienza, Rome, Italy; Laboratory of Gene Expression, Department of Internal Medicine (DMISM), Sapienza University of Rome, Italy
| | - Laura Belloni
- Center for Life Nanosciences (CNLS) - IIT/Sapienza, Rome, Italy; Laboratory of Gene Expression, Department of Internal Medicine (DMISM), Sapienza University of Rome, Italy
| | - Francesca Fausti
- Dermatology Unit, Department of Neuroscience, Mental Health and Sensory Organs (NESMOS), Sapienza University of Rome, Italy
| | - Elisabetta Botti
- Dermatology Unit, Department of Neuroscience, Mental Health and Sensory Organs (NESMOS), Sapienza University of Rome, Italy
| | - Massimo Levrero
- Center for Life Nanosciences (CNLS) - IIT/Sapienza, Rome, Italy; Laboratory of Gene Expression, Department of Internal Medicine (DMISM), Sapienza University of Rome, Italy.
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35
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Yan M, Zhang Y, He B, Xiang J, Wang ZF, Zheng FM, Xu J, Chen MY, Zhu YL, Wen HJ, Wan XB, Yue CF, Yang N, Zhang W, Zhang JL, Wang J, Wang Y, Li LH, Zeng YX, Lam EWF, Hung MC, Liu Q. IKKα restoration via EZH2 suppression induces nasopharyngeal carcinoma differentiation. Nat Commun 2014; 5:3661. [DOI: 10.1038/ncomms4661] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2013] [Accepted: 03/14/2014] [Indexed: 02/07/2023] Open
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36
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Vuillier F, Gaud G, Guillemot D, Commere PH, Pons C, Favre M. Loss of the HPV-infection resistance EVER2 protein impairs NF-κB signaling pathways in keratinocytes. PLoS One 2014; 9:e89479. [PMID: 24586810 PMCID: PMC3929693 DOI: 10.1371/journal.pone.0089479] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Accepted: 01/21/2014] [Indexed: 02/02/2023] Open
Abstract
Homozygous mutations in EVER genes cause epidermodysplasia verruciformis (EV), characterized by an immune defect and the development of skin cancers associated with β-human papillomavirus (HPV) infections. The effects of EVER protein loss on the keratinocyte immune response remain unknown. We show here that EVER2 plays a critical role in the interplay between the NF-κB and JNK/AP-1 signaling pathways. EVER2-deficient cells overproduce IL-6 following the upregulation of JNK activation. They respond poorly to phorbol ester and TNF via the NF-κB pathway. They have lower levels of IKKα subunit, potentially accounting for impairments of p100 processing and the alternative NF-κB pathway. The loss of EVER2 is associated with an unusual TRAF protein profile. We demonstrate that EVER2 deficiency sustains TRAF2 ubiquitination and decreases the pool of TRAF2 available in the detergent-soluble fraction of the cell. Finally, we demonstrate that EVER2 loss induces constitutive PKCα-dependent c-jun phosphorylation and facilitates activation of the HPV5 long control region through a JNK-dependent pathway. These findings indicate that defects of the EVER2 gene may create an environment conducive to HPV replication and the persistence of lesions with the potential to develop into skin cancer.
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Affiliation(s)
- Françoise Vuillier
- Unité de Génétique, Papillomavirus et Cancer Humain, Institut Pasteur, Paris, France
| | - Guillaume Gaud
- Unité de Génétique, Papillomavirus et Cancer Humain, Institut Pasteur, Paris, France
| | - Delphine Guillemot
- Unité de Génétique, Papillomavirus et Cancer Humain, Institut Pasteur, Paris, France
| | | | - Christian Pons
- Unité de Génétique, Papillomavirus et Cancer Humain, Institut Pasteur, Paris, France
| | - Michel Favre
- Unité de Génétique, Papillomavirus et Cancer Humain, Institut Pasteur, Paris, France
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RNAi-mediated knockdown of IKK1 in transgenic mice using a transgenic construct containing the human H1 promoter. ScientificWorldJournal 2014; 2014:193803. [PMID: 24523631 PMCID: PMC3913291 DOI: 10.1155/2014/193803] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Accepted: 10/12/2013] [Indexed: 01/16/2023] Open
Abstract
Inhibition of gene expression through siRNAs is a tool increasingly used for the study of gene function in model systems, including transgenic mice. To achieve perdurable effects, the stable expression of siRNAs by an integrated transgenic construct is necessary. For transgenic siRNA expression, promoters transcribed by either RNApol II or III (such as U6 or H1 promoters) can be used. Relatively large amounts of small RNAs synthesis are achieved when using RNApol III promoters, which can be advantageous in knockdown experiments. To study the feasibility of H1 promoter-driven RNAi-expressing constructs for protein knockdown in transgenic mice, we chose IKK1 as the target gene. Our results indicate that constructs containing the H1 promoter are sensitive to the presence of prokaryotic sequences and to transgene position effects, similar to RNApol II promoters-driven constructs. We observed variable expression levels of transgenic siRNA among different tissues and animals and a reduction of up to 80% in IKK1 expression. Furthermore, IKK1 knockdown led to hair follicle alterations. In summary, we show that constructs directed by the H1 promoter can be used for knockdown of genes of interest in different organs and for the generation of animal models complementary to knockout and overexpression models.
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38
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Hinz M, Scheidereit C. The IκB kinase complex in NF-κB regulation and beyond. EMBO Rep 2013; 15:46-61. [PMID: 24375677 DOI: 10.1002/embr.201337983] [Citation(s) in RCA: 386] [Impact Index Per Article: 35.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
The IκB kinase (IKK) complex is the signal integration hub for NF-κB activation. Composed of two serine-threonine kinases (IKKα and IKKβ) and the regulatory subunit NEMO (also known as IKKγ), the IKK complex integrates signals from all NF-κB activating stimuli to catalyze the phosphorylation of various IκB and NF-κB proteins, as well as of other substrates. Since the discovery of the IKK complex components about 15 years ago, tremendous progress has been made in the understanding of the IKK architecture and its integration into signaling networks. In addition to the control of NF-κB, IKK subunits mediate the crosstalk with other pathways, thereby extending the complexity of their biological function. This review summarizes recent advances in IKK biology and focuses on emerging aspects of IKK structure, regulation and function.
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Affiliation(s)
- Michael Hinz
- Max Delbrück Center for Molecular Medicine, Berlin, Germany
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Xia X, Liu S, Xiao Z, Zhu F, Song NY, Zhou M, Liu B, Shen J, Nagashima K, Veenstra TD, Burkett S, Datla M, Willette-Brown J, Shen H, Hu Y. An IKKα-nucleophosmin axis utilizes inflammatory signaling to promote genome integrity. Cell Rep 2013; 5:1243-55. [PMID: 24290756 PMCID: PMC4159076 DOI: 10.1016/j.celrep.2013.10.046] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Revised: 08/19/2013] [Accepted: 10/29/2013] [Indexed: 01/04/2023] Open
Abstract
The inflammatory microenvironment promotes skin tumorigenesis. However, the mechanisms by which cells protect themselves from inflammatory signals are unknown. Downregulation of IKKα promotes skin tumor progression from papillomas to squamous cell carcinomas, which is frequently accompanied by genomic instability, including aneuploid chromosomes and extra centrosomes. In this study, we found that IKKα promoted oligomerization of nucleophosmin (NPM), a negative centrosome duplication regulator, which further enhanced NPM and centrosome association, inhibited centrosome amplification, and maintained genome integrity. Levels of NPM hexamers and IKKα were conversely associated with skin tumor progression. Importantly, proinflammatory cytokine-induced IKKα activation promoted the formation of NPM oligomers and reduced centrosome numbers in mouse and human cells, whereas kinase-dead IKKα blocked this connection. Therefore, our findings suggest a mechanism in which an IKKα-NPM axis may use inflammatory signals to suppress centrosome amplification, promote genomic integrity, and prevent tumor progression.
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Affiliation(s)
- Xiaojun Xia
- Department of Nanomedicine, Houston Methodist Hospital Research Institute, Houston, TX 77030, USA
| | - Shuang Liu
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21701, USA
| | - Zuoxiang Xiao
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21701, USA
| | - Feng Zhu
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21701, USA
| | - Na-Young Song
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21701, USA
| | - Ming Zhou
- Laboratory of Proteomics and Analytical Technologies, SAIC-Frederick, Frederick National Laboratory for Cancer Research, Frederick, MD 21701, USA
| | - Bigang Liu
- Department of Molecular Carcinogenesis, The University of Texas M. D. Anderson Cancer Center, Unit 389, Smithville, TX 78957, USA
| | - Jianjun Shen
- Department of Molecular Carcinogenesis, The University of Texas M. D. Anderson Cancer Center, Unit 389, Smithville, TX 78957, USA
| | - Kunio Nagashima
- Advanced Technology Program, Electron Microscopy Laboratory, SAIC-Frederick, Frederick National Laboratory for Cancer Research, Frederick, MD 21701, USA
| | - Timothy D Veenstra
- Laboratory of Proteomics and Analytical Technologies, SAIC-Frederick, Frederick National Laboratory for Cancer Research, Frederick, MD 21701, USA
| | - Sandra Burkett
- Mouse Cancer Genetics Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21701, USA
| | - Mahesh Datla
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21701, USA
| | - Jami Willette-Brown
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21701, USA
| | - Haifa Shen
- Department of Nanomedicine, Houston Methodist Hospital Research Institute, Houston, TX 77030, USA
| | - Yinling Hu
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21701, USA.
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ASPP2 suppresses squamous cell carcinoma via RelA/p65-mediated repression of p63. Proc Natl Acad Sci U S A 2013; 110:17969-74. [PMID: 24127607 DOI: 10.1073/pnas.1309362110] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Squamous cell carcinoma (SCC) is highly malignant and refractory to therapy. The majority of existing mouse SCC models involve multiple gene mutations. Very few mouse models of spontaneous SCC have been generated by a single gene deletion. Here we report a haploinsufficient SCC mouse model in which exon 3 of the Tp53BP2 gene (a p53 binding protein) was deleted in one allele in a BALB/c genetic background. Tp53BP2 encodes ASPP2 (ankyrin repeats, SH3 domain and protein rich region containing protein 2). Keratinocyte differentiation induces ASPP2 and its expression is inversely correlated with p63 protein in vitro and in vivo. Up-regulation of p63 expression is required for ASPP2(Δexon3/+) BALB/c mice to develop SCC, as heterozygosity of p63 but not p53 prevents them from developing it. Mechanistically, ASPP2 inhibits ΔNp63 expression through its ability to bind IκB and enhance nuclear Rel/A p65, a component of the NF-κB transcription complex, which mediates the repression of p63. Reduced ASPP2 expression associates with tumor metastasis and increased p63 expression in human head and neck SCCs. This study identifies ASPP2 as a tumor suppressor that suppresses SCC via inflammatory signaling through NF-κB-mediated repression of p63.
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Xie Y, Li Y, Peng X, Henderson F, Deng L, Chen N. Ikappa B kinase alpha involvement in the development of nasopharyngeal carcinoma through a NF-κB-independent and ERK-dependent pathway. Oral Oncol 2013; 49:1113-20. [PMID: 24075781 DOI: 10.1016/j.oraloncology.2013.08.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2013] [Revised: 08/28/2013] [Accepted: 08/29/2013] [Indexed: 02/05/2023]
Abstract
OBJECTIVES Ikappa B kinase alpha (IKKα) plays an inhibitory role in the development of epithelial-derived tumors. However, its specific function in the development of nasopharyngeal carcinoma (NPC) remains unknown. In this study we identify the role and mechanism of IKKα in IKKα-mediated NPC development. MATERIAL AND METHODS The effect of IKKα on migration, invasion and tumorigenesis of NPC cell lines was determined using in vitro and in vivo studies. SUNE-1-5-8F cells transfected to overexpress IKKα, SUNE-1-6-10B cells with shRNA-mediated knockdown of IKKα, and three NPC cell lines were studied using Western blotting techniques to compare the major molecules in NF-κB pathways. Additionally, the extracellular signal-regulated kinase (ERK) pathway and matrix metalloproteinases (MMPs) in IKKα-regulated NPC and the effect of Epstein-Barr Nuclear Antigen 1 (EBNA1) on IKKα were examined. RESULTS IKKα was underexpressed in highly invasive SUNE-1-5-8F cells compared with non-invasive cells (SUNE-1 and SUNE-6-10B). Overexpression of IKKα in SUNE-1-5-8F cells was achieved through transfection and resulted in inhibited migration and invasion in vitro. Furthermore, IKKα inhibited tumorigenesis in mice inoculated with IKKα-transfected NPC cells in vivo. These processes were independent of the conventional effect of IKKα on Nuclear factor κB (NF-κB) pathways. The ERK pathway was involved in IKKα-related NPC inhibition. Phosphorylation of ERK1/2 and subsequent secretion of MMP-9 were inhibited by the ERK inhibitor U0126 and not regulated by overexpressed IKKα. EBNA1 knockdown using small interfering RNA (siRNA) did not alter the expression of IKKα. CONCLUSION Increase in IKKα expression suppresses the progression of NPC through a NF-κB-independent and ERK-dependent pathway.
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Affiliation(s)
- Yuxin Xie
- Department of Radiation Oncology, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
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Deng L, Li Y, Ai P, Xie Y, Zhu H, Chen N. Increase in IkappaB kinase alpha expression suppresses the tumor progression and improves the prognosis for nasopharyngeal carcinoma. Mol Carcinog 2013; 54:156-65. [PMID: 24753359 DOI: 10.1002/mc.22087] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 08/13/2013] [Accepted: 08/14/2013] [Indexed: 02/05/2023]
Abstract
Recent studies have suggested that the action of IkappaB kinase alpha (IKKα) as a tumor suppressor is crucial in the development of skin carcinoma, but its role in nasopharyngeal carcinoma (NPC) remains unknown. We examined the IKKα expression in specimens from 157 NPC patients by immunohistochemistry and analyzed the effect of IKKα on prognosis. The functional significance of IKKα expression in NPC cell lines was investigated by IKKα overexpression or downregulation in in vitro studies. The in vitro assays revealed that the IKKα expression was negatively correlated with the invasiveness, migration, and angiogenesis of NPC cells. Overexpression or downregulation of IKKα could significantly repress or enhance the above characteristics, respectively, and these effects were independent of IKKα kinase or EBNA1. In 157 NPC cases, IKKα was differentially expressed in NPC tissues. High expression of IKKα was associated significantly with a high disease-free survival (DFS; P = 0.002) or overall survival (OS; P = 0.014). Multivariate analyses showed that the IKKα expression was an independent risk factor for DFS (HR, 2.302; P = 0.011) and OS (HR, 3.578; P = 0.006). Our findings indicated that IKKα plays a crucial role as a tumor suppressor that suppresses the invasion, metastasis, and angiogenesis of NPC cells in vitro and correlates with the survival in NPC patients. Therefore, IKKα is not only a novel independent prognostic indicator in NPC, but also targeting IKKα expression may provide a potential therapeutic strategy for NPC.
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Affiliation(s)
- Ling Deng
- Department of Radiation Oncology, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
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Xiao Z, Jiang Q, Willette-Brown J, Xi S, Zhu F, Burkett S, Back T, Song NY, Datla M, Sun Z, Goldszmid R, Lin F, Cohoon T, Pike K, Wu X, Schrump DS, Wong KK, Young HA, Trinchieri G, Wiltrout RH, Hu Y. The pivotal role of IKKα in the development of spontaneous lung squamous cell carcinomas. Cancer Cell 2013; 23:527-40. [PMID: 23597566 PMCID: PMC3649010 DOI: 10.1016/j.ccr.2013.03.009] [Citation(s) in RCA: 91] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2012] [Revised: 01/21/2013] [Accepted: 03/12/2013] [Indexed: 02/07/2023]
Abstract
Here, we report that kinase-dead IKKα knockin mice develop spontaneous lung squamous cell carcinomas (SCCs) associated with IKKα downregulation and marked pulmonary inflammation. IKKα reduction upregulated the expression of p63, Trim29, and keratin 5 (K5), which serve as diagnostic markers for human lung SCCs. IKKα(low)K5(+)p63(hi) cell expansion and SCC formation were accompanied by inflammation-associated deregulation of oncogenes, tumor suppressors, and stem cell regulators. Reintroducing transgenic K5.IKKα, depleting macrophages, and reconstituting irradiated mutant animals with wild-type bone marrow (BM) prevented SCC development, suggesting that BM-derived IKKα mutant macrophages promote the transition of IKKα(low)K5(+)p63(hi) cells to tumor cells. This mouse model resembles human lung SCCs, sheds light on the mechanisms underlying lung malignancy development, and identifies targets for therapy of lung SCCs.
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MESH Headings
- Animals
- Carcinoma, Squamous Cell/enzymology
- Carcinoma, Squamous Cell/genetics
- Carcinoma, Squamous Cell/pathology
- Cell Differentiation/physiology
- Cell Growth Processes/physiology
- Cell Line, Tumor
- Cell Transformation, Neoplastic/genetics
- Cell Transformation, Neoplastic/metabolism
- Cell Transformation, Neoplastic/pathology
- Disease Models, Animal
- Gene Expression Regulation, Neoplastic
- Humans
- I-kappa B Kinase/genetics
- I-kappa B Kinase/metabolism
- I-kappa B Kinase/physiology
- Lung Neoplasms/enzymology
- Lung Neoplasms/genetics
- Lung Neoplasms/pathology
- Mice
- Mice, Transgenic
- Phosphoproteins/biosynthesis
- Trans-Activators/biosynthesis
- Transcription Factors/biosynthesis
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Affiliation(s)
- Zouxiang Xiao
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21701, USA
| | - Qun Jiang
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21701, USA
| | - Jami Willette-Brown
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21701, USA
| | - Sichuan Xi
- Thoracic Oncology Section, Surgery Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD 20892, USA
| | - Feng Zhu
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21701, USA
| | - Sandra Burkett
- Mouse Cancer Genetics Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21701, USA
| | - Timothy Back
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21701, USA
| | - Na-Young Song
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21701, USA
| | - Mahesh Datla
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21701, USA
| | - Zhonghe Sun
- Laboratory of Molecular Technology, SAIC-Frederick, Inc., Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA
| | - Romina Goldszmid
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21701, USA
| | - Fanching Lin
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21701, USA
| | - Travis Cohoon
- Department of Medical Oncology, Dana-Farber Cancer Institute, 44 Binney Street, Boston, MA 02115, USA
| | - Kristen Pike
- Laboratory of Molecular Technology, SAIC-Frederick, Inc., Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA
| | - Xiaolin Wu
- Laboratory of Molecular Technology, SAIC-Frederick, Inc., Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA
| | - David S. Schrump
- Thoracic Oncology Section, Surgery Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD 20892, USA
| | - Kwok-Kin Wong
- Department of Medical Oncology, Dana-Farber Cancer Institute, 44 Binney Street, Boston, MA 02115, USA
| | - Howard A. Young
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21701, USA
| | - Giorgio Trinchieri
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21701, USA
| | - Robert H. Wiltrout
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21701, USA
| | - Yinling Hu
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21701, USA
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44
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Aberrant IKKα and IKKβ cooperatively activate NF-κB and induce EGFR/AP1 signaling to promote survival and migration of head and neck cancer. Oncogene 2013; 33:1135-47. [PMID: 23455325 PMCID: PMC3926900 DOI: 10.1038/onc.2013.49] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2011] [Revised: 01/07/2013] [Accepted: 01/18/2013] [Indexed: 12/23/2022]
Abstract
The Inhibitor-κB Kinase-Nuclear Factor-κB (IKK-NF-κB) and Epidermal Growth Factor Receptor-Activator Protein-1 (EGFR-AP-1) pathways are often co-activated and promote malignant behavior, but the underlying basis for this relationship is unclear. Resistance to inhibitors of IKKβ or EGFR is observed in head and neck squamous cell carcinomas (HNSCC). Here, we reveal that both IKKα and β contribute to nuclear activation of canonical and alternate NF-κB/REL family transcription factors, and overexpression of signal components enhancing co-activation of the EGFR-AP1 pathway. We observed that IKKα and IKKβ exhibit increased protein expression, nuclear localization and phosphorylation in HNSCC tissues and cell lines. Individually, IKK activity varied amongst different cell lines, but overexpression of both IKKs induced the strongest NF-κB activation. Conversely, siRNA knockdown of both IKKs significantly decreased nuclear localization and phosphorylation of canonical RELA and IκBα, and alternative p52 and RELB subunits. Knockdown of both IKKs more effectively inhibited NF-κB activation, broadly modulated gene expression, and suppressed cell proliferation and migration. Global expression profiling revealed that NF-κB, cytokine, inflammatory response, and growth factor signaling are among the top pathways and networks regulated by IKKs. Importantly, IKKα and IKKβ together promoted the expression and activity of TGFα, EGFR, and AP1 transcription factors cJun, JunB, and Fra1. Knockdown of AP1 subunits individually decreased 8/15 (53%) of IKK-targeted genes sampled, and similarly inhibited cell proliferation and migration. Mutations of NF-κB and AP1 binding sites abolished or decreased IKK-induced IL-8 promoter activity. Compounds such as wedelactone with dual IKK inhibitory activity, and geldanomycins that block IKKα/β and EGFR pathways were more active than IKKβ-specific inhibitors in suppressing NF-κB activation and proliferation, and inducing cell death. We conclude that IKKα and IKKβ cooperatively activate NF-κB and EGFR/AP1 networks of signaling pathways, and contribute to the malignant phenotype and the intrinsic or acquired therapeutic resistance of HNSCC.
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Ectopic expression of Zmiz1 induces cutaneous squamous cell malignancies in a mouse model of cancer. J Invest Dermatol 2013; 133:1863-9. [PMID: 23426136 PMCID: PMC3672356 DOI: 10.1038/jid.2013.77] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Cutaneous squamous cell carcinoma (SCC) is the second most common form of cancer in the human population, yet the underlying genetic mechanisms contributing to the disease are not well understood. We recently identified Zmiz1 as a candidate oncogene in non-melanoma skin cancer through a transposon mutagenesis screen. Here we show that transposon-induced mutations in Zmiz1 drive expression of a truncated transcript that is similar to an alternative endogenous ZMIZ1 transcript found to be overexpressed in human SCCs relative to normal skin. We also describe an original mouse model of invasive keratoacanthoma driven by skin-specific expression of the truncated Zmiz1 transcript. Unlike most mouse models, Zmiz1-induced skin tumors develop rapidly and in the absence of promoting agents such as phorbol esters. Additionally, we found that the alternative Zmiz1 isoform has greater protein stability than its full-length counterpart. Finally, we provide evidence that ZMIZ1 is overexpressed in a significant percentage of human breast, ovarian, and colon cancers in addition to human SCCs, suggesting ZMIZ1 may play a broader role in epithelial cancers.
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46
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Mouse Genetic Models Reveal Surprising Functions of IkB Kinase Alpha in Skin Development and Skin Carcinogenesis. Cancers (Basel) 2013; 5:170-83. [PMID: 24216703 PMCID: PMC3730312 DOI: 10.3390/cancers5010170] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2012] [Revised: 01/25/2013] [Accepted: 02/06/2013] [Indexed: 01/05/2023] Open
Abstract
Gene knockout studies unexpectedly reveal a pivotal role for IκB kinase alpha (IKKα) in mouse embryonic skin development. Skin carcinogenesis experiments show that Ikkα heterozygous mice are highly susceptible to chemical carcinogen or ultraviolet B light (UVB) induced benign and malignant skin tumors in comparison to wild-type mice. IKKα deletion mediated by keratin 5 (K5).Cre or K15.Cre in keratinocytes induces epidermal hyperplasia and spontaneous skin squamous cell carcinomas (SCCs) in Ikkα floxed mice. On the other hand, transgenic mice overexpressing IKKα in the epidermis, under the control of a truncated loricrin promoter or K5 promoter, develop normal skin and show no defects in the formation of the epidermis and other epithelial organs, and the transgenic IKKα represses chemical carcinogen or UVB induced skin carcinogenesis. Moreover, IKKα deletion mediated by a mutation, which generates a stop codon in the Ikkα gene, has been reported in a human autosomal recessive lethal syndrome. Downregulated IKKα and Ikkα mutations and deletions are found in human skin SCCs. The collective evidence not only highlights the importance of IKKα in skin development, maintaining skin homeostasis, and preventing skin carcinogenesis, but also demonstrates that mouse models are extremely valuable tools for revealing the mechanisms underlying these biological events, leading our studies from bench side to bedside.
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47
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Lopez-Pajares V, Yan K, Zarnegar BJ, Jameson KL, Khavari PA. Genetic pathways in disorders of epidermal differentiation. Trends Genet 2013; 29:31-40. [PMID: 23141808 PMCID: PMC5477429 DOI: 10.1016/j.tig.2012.10.005] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2012] [Revised: 10/02/2012] [Accepted: 10/04/2012] [Indexed: 10/27/2022]
Abstract
More than 100 human genetic skin diseases, impacting over 20% of the population, are characterized by disrupted epidermal differentiation. A significant proportion of the 90 genes identified in these disorders to date are concentrated within several functional pathways, suggesting the emergence of organizing themes in epidermal differentiation. Among these are the Notch, transforming growth factor β (TGFβ), IκB kinase (IKK), Ras/mitogen-activated protein kinase (MAPK), phosphoinositide 3-kinase (PI3K), p63, and Wnt signaling pathways, as well as core biological processes mediating calcium homeostasis, tissue integrity, cornification, and lipid biogenesis. Here, we review recent results supporting the central role of these pathways in epidermal differentiation, highlighting the integration of genetic information with functional studies to illuminate the biological actions of these pathways in humans as well as to guide development of future therapeutics to correct their dysfunction.
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Affiliation(s)
| | - Karen Yan
- Program in Epithelial Biology, Stanford University, Stanford, CA 94305
| | - Brian J. Zarnegar
- Program in Epithelial Biology, Stanford University, Stanford, CA 94305
| | | | - Paul A. Khavari
- Program in Epithelial Biology, Stanford University, Stanford, CA 94305
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48
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A truncated form of IKKα is responsible for specific nuclear IKK activity in colorectal cancer. Cell Rep 2012; 2:840-54. [PMID: 23041317 DOI: 10.1016/j.celrep.2012.08.028] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Revised: 07/11/2012] [Accepted: 08/27/2012] [Indexed: 01/29/2023] Open
Abstract
Nuclear IKKα regulates gene transcription by phosphorylating specific substrates and has been linked to cancer progression and metastasis. However, the mechanistic connection between tumorigenesis and IKKα activity remains poorly understood. We have now analyzed 288 human colorectal cancer samples and found a significant association between the presence of nuclear IKK and malignancy. Importantly, the nucleus of tumor cells contains an active IKKα isoform with a predicted molecular weight of 45 kDa (p45-IKKα) that includes the kinase domain but lacks several regulatory regions. Active nuclear p45-IKKα forms a complex with nonactive IKKα and NEMO that mediates phosphorylation of SMRT and histone H3. Proteolytic cleavage of FL-IKKα into p45-IKKα is required for preventing the apoptosis of CRC cells in vitro and sustaining tumor growth in vivo. Our findings identify a potentially druggable target for treating patients with advance refractory CRC.
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49
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Byg LM, Vidlund J, Vasiljevic N, Clausen D, Forslund O, Norrild B. NF-κB signalling is attenuated by the E7 protein from cutaneous human papillomaviruses. Virus Res 2012; 169:48-53. [DOI: 10.1016/j.virusres.2012.06.028] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2012] [Revised: 06/29/2012] [Accepted: 06/29/2012] [Indexed: 12/18/2022]
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50
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Jacque E, Billot K, Authier H, Bordereaux D, Baud V. RelB inhibits cell proliferation and tumor growth through p53 transcriptional activation. Oncogene 2012; 32:2661-9. [DOI: 10.1038/onc.2012.282] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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