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Sekine Y, Kikkawa K, Honda S, Sasaki Y, Kawahara S, Mizushima A, Togi S, Fujimuro M, Oritani K, Matsuda T. STAP-2 facilitates insulin signaling through binding to CAP/c-Cbl and regulates adipocyte differentiation. Sci Rep 2024; 14:5799. [PMID: 38461189 PMCID: PMC10925025 DOI: 10.1038/s41598-024-56533-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 03/07/2024] [Indexed: 03/11/2024] Open
Abstract
Signal-transducing adaptor protein-2 (STAP-2) is an adaptor molecule involved in several cellular signaling cascades. Here, we attempted to identify novel STAP-2 interacting molecules, and identified c-Cbl associated protein (CAP) as a binding protein through the C-terminal proline-rich region of STAP-2. Expression of STAP-2 increased the interaction between CAP and c-Cbl, suggesting that STAP-2 bridges these proteins and enhances complex formation. CAP/c-Cbl complex is known to regulate GLUT4 translocation in insulin signaling. STAP-2 overexpressed human hepatocyte Hep3B cells showed enhanced GLUT4 translocation after insulin treatment. Elevated levels of Stap2 mRNA have been observed in 3T3-L1 cells and mouse embryonic fibroblasts (MEFs) during adipocyte differentiation. The differentiation of 3T3-L1 cells into adipocytes was highly promoted by retroviral overexpression of STAP-2. In contrast, STAP-2 knockout (KO) MEFs exhibited suppressed adipogenesis. The increase in body weight with high-fat diet feeding was significantly decreased in STAP-2 KO mice compared to WT animals. These data suggest that the expression of STAP-2 correlates with adipogenesis. Thus, STAP-2 is a novel regulatory molecule that controls insulin signal transduction by forming a c-Cbl/STAP-2/CAP ternary complex.
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Affiliation(s)
- Yuichi Sekine
- Department of Cell Biology, Kyoto Pharmaceutical University, Kyoto, 607-8412, Japan.
| | - Kazuna Kikkawa
- Department of Cell Biology, Kyoto Pharmaceutical University, Kyoto, 607-8412, Japan
| | - Sachie Honda
- Department of Cell Biology, Kyoto Pharmaceutical University, Kyoto, 607-8412, Japan
| | - Yuto Sasaki
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, 060-0812, Japan
| | - Shoya Kawahara
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, 060-0812, Japan
| | - Akihiro Mizushima
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, 060-0812, Japan
| | - Sumihito Togi
- Division of Genomic Medicine, Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, Kahoku, Ishikawa, 920-0293, Japan
| | - Masahiro Fujimuro
- Department of Cell Biology, Kyoto Pharmaceutical University, Kyoto, 607-8412, Japan
| | - Kenji Oritani
- Department of Hematology, International University of Health and Welfare, Narita, Chiba, 286-8686, Japan
| | - Tadashi Matsuda
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, 060-0812, Japan.
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Kashiwakura JI, Matsuda T. [Understanding New Regulatory Mechanism of TCR Signal Transduction]. YAKUGAKU ZASSHI 2024; 144:497-501. [PMID: 38692923 DOI: 10.1248/yakushi.23-00154-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2024]
Abstract
Signal-transducing adaptor protein-2 (STAP-2) is a unique scaffold protein that regulates several immunological signaling pathways, including LIF/LIF receptor and LPS/TLR4 signals. STAP-2 is required for Fas/FasL-dependent T cell apoptosis and SDF-1α-induced T cell migration. Conversely, STAP-2 modulates integrin-mediated T cell adhesion, suggesting that STAP-2 is essential for several negative and positive T cell functions. However, whether STAP-2 is involved in T cell-antigen receptor (TCR)-mediated T cell activation is unknown. STAP-2 deficiency was recently reported to suppress TCR-mediated T cell activation by inhibiting LCK-mediated CD3ζ and ZAP-70 activation. Using STAP-2 deficient mice, it was demonstrated that STAP-2 is required for the pathogenesis of Propionibacterium acnes-induced granuloma formation and experimental autoimmune encephalomyelitis. Here, detailed functions of STAP-2 in TCR-mediated T cell activation, and how STAP-2 affects the pathogenesis of T cell-mediated inflammation and immune diseases, are reviewed.
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MESH Headings
- Animals
- Humans
- Mice
- Adaptor Proteins, Signal Transducing/physiology
- Adaptor Proteins, Signal Transducing/metabolism
- Apoptosis
- CD3 Complex
- Cell Adhesion
- Cell Movement
- Chemokine CXCL12/physiology
- Chemokine CXCL12/metabolism
- Encephalomyelitis, Autoimmune, Experimental/immunology
- Encephalomyelitis, Autoimmune, Experimental/etiology
- Inflammation/immunology
- Lymphocyte Activation
- Lymphocyte Specific Protein Tyrosine Kinase p56(lck)/physiology
- Lymphocyte Specific Protein Tyrosine Kinase p56(lck)/metabolism
- Propionibacterium acnes/physiology
- Propionibacterium acnes/immunology
- Receptors, Antigen, T-Cell/physiology
- Receptors, Antigen, T-Cell/metabolism
- Signal Transduction
- T-Lymphocytes/immunology
- ZAP-70 Protein-Tyrosine Kinase/metabolism
- ZAP-70 Protein-Tyrosine Kinase/physiology
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Affiliation(s)
- Jun-Ichi Kashiwakura
- Department of Life Science, Faculty of Pharmaceutical Sciences, Hokkaido University of Science
| | - Tadashi Matsuda
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University
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Kashiwakura JI, Kawahara S, Inagaki I, Inui K, Saitoh K, Kagohashi K, Sasaki Y, Kobayashi F, Kitai Y, Muromoto R, Oritani K, Matsuda T. STAP-2 negatively regulates BCR-mediated B cell activation by recruiting tyrosine-protein kinase CSK to LYN. FEBS Lett 2023; 597:2433-2445. [PMID: 37669828 DOI: 10.1002/1873-3468.14730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Revised: 08/09/2023] [Accepted: 08/11/2023] [Indexed: 09/07/2023]
Abstract
Although signal-transducing adaptor protein-2 (STAP-2) acts in certain immune responses, its role in B cell receptor (BCR)-mediated signals remains unknown. In this study, we have revealed that BCR-mediated signals, cytokine production and antibody production were increased in STAP-2 knockout (KO) mice compared with wild-type (WT) mice. Phosphorylation of tyrosine-protein kinase LYN Y508 was reduced in STAP-2 KO B cells after BCR stimulation. Mechanistic analysis revealed that STAP-2 directly binds to LYN, dependently of STAP-2 Y250 phosphorylation by LYN. Furthermore, phosphorylation of STAP-2 enhanced interactions between LYN and tyrosine-protein kinase CSK, resulting in enhanced CSK-mediated LYN Y508 phosphorylation. These results suggest that STAP-2 is crucial for controlling BCR-mediated signals and antibody production by enhanced CSK-mediated feedback regulation of LYN.
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Affiliation(s)
- Jun-Ichi Kashiwakura
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
- Department of Life Science, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, Sapporo, Hokkaido, Japan
| | - Shoya Kawahara
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Iori Inagaki
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Kyosuke Inui
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Kodai Saitoh
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Kota Kagohashi
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Yuto Sasaki
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Fuki Kobayashi
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Yuichi Kitai
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Ryuta Muromoto
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Kenji Oritani
- Department of Hematology, International University of Health and Welfare, Narita, Chiba, Japan
| | - Tadashi Matsuda
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
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Sasaki Y, Saitoh K, Kagohashi K, Ose T, Kawahara S, Kitai Y, Muromoto R, Sekine Y, Ichii M, Yoshimura A, Oritani K, Kashiwakura JI, Matsuda T. STAP-2-Derived Peptide Suppresses TCR-Mediated Signals to Initiate Immune Responses. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2023; 211:755-766. [PMID: 37417746 DOI: 10.4049/jimmunol.2200942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Accepted: 06/20/2023] [Indexed: 07/08/2023]
Abstract
Signal-transducing adaptor protein-2 (STAP-2) is an adaptor protein that contains pleckstrin and Src homology 2-like domains, as well as a proline-rich region in its C-terminal region. Our previous study demonstrated that STAP-2 positively regulates TCR signaling by associating with TCR-proximal CD3ζ ITAMs and the lymphocyte-specific protein tyrosine kinase. In this study, we identify the STAP-2 interacting regions of CD3ζ ITAMs and show that the STAP-2-derived synthetic peptide (iSP2) directly interacts with the ITAM sequence and blocks the interactions between STAP-2 and CD3ζ ITAMs. Cell-penetrating iSP2 was delivered into human and murine T cells. iSP2 suppressed cell proliferation and TCR-induced IL-2 production. Importantly, iSP2 treatment suppressed TCR-mediated activation of naive CD4+ T cells and decreased immune responses in CD4+ T cell-mediated experimental autoimmune encephalomyelitis. It is likely that iSP2 is a novel immunomodulatory tool that modulates STAP-2-mediated activation of TCR signaling and represses the progression of autoimmune diseases.
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Affiliation(s)
- Yuto Sasaki
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
| | - Kodai Saitoh
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
| | - Kota Kagohashi
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
| | - Toyoyuki Ose
- Faculty of Advanced Life Science, Hokkaido University, Sapporo, Japan
| | - Shoya Kawahara
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
| | - Yuichi Kitai
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
| | - Ryuta Muromoto
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
| | - Yuichi Sekine
- Department of Cell Biology, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Michiko Ichii
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Akihiko Yoshimura
- Department of Microbiology and Immunology, Keio University School of Medicine, Tokyo, Japan
| | - Kenji Oritani
- Department of Hematology, International University of Health and Welfare, Narita, Japan
| | - Jun-Ichi Kashiwakura
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
- Department of Life Science, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, Sapporo, Japan
| | - Tadashi Matsuda
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
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Saitoh K, Kashiwakura JI, Kagohashi K, Sasaki Y, Kawahara S, Sekine Y, Kitai Y, Muromoto R, Ichii M, Nakatsukasa H, Yoshimura A, Oritani K, Matsuda T. STAP-2 Is a Novel Positive Regulator of TCR-Proximal Signals. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2022; 209:57-68. [PMID: 35725273 DOI: 10.4049/jimmunol.2101014] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 04/19/2022] [Indexed: 06/15/2023]
Abstract
TCR ligation with an Ag presented on MHC molecules promotes T cell activation, leading to the selection, differentiation, and proliferation of T cells and cytokine production. These immunological events are optimally arranged to provide appropriate responses against a variety of pathogens. We here propose signal-transducing adaptor protein-2 (STAP-2) as a new positive regulator of TCR signaling. STAP-2-deficient T cells showed reduced, whereas STAP-2-overexpressing T cells showed enhanced, TCR-mediated signaling and downstream IL-2 production. For the mechanisms, STAP-2 associated with TCR-proximal CD3ζ immunoreceptor tyrosine activation motifs and phosphorylated LCK, resulting in enhancement of their binding after TCR stimulation. In parallel, STAP-2 expression is required for full activation of downstream TCR signaling. Importantly, STAP-2-deficient mice exhibited slight phenotypes of CD4+ T-cell-mediated inflammatory diseases, such as experimental autoimmune encephalomyelitis, whereas STAP-2-overexpressing transgenic mice showed severe phenotypes of these diseases. Together, STAP-2 is an adaptor protein to enhance TCR signaling; therefore, manipulating STAP-2 will have an ability to improve the treatment of patients with autoimmune diseases as well as the chimeric Ag receptor T cell therapy.
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Affiliation(s)
- Kodai Saitoh
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Jun-Ichi Kashiwakura
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Kota Kagohashi
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Yuto Sasaki
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Shoya Kawahara
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Yuichi Sekine
- Department of Cell Biology, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Yuichi Kitai
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Ryuta Muromoto
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Michiko Ichii
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Hiroko Nakatsukasa
- Department of Microbiology and Immunology, Keio University School of Medicine, Shinjuku-Ku, Tokyo, Japan; and
| | - Akihiko Yoshimura
- Department of Microbiology and Immunology, Keio University School of Medicine, Shinjuku-Ku, Tokyo, Japan; and
| | - Kenji Oritani
- Department of Hematology, International University of Health and Welfare, Narita, Chiba, Japan
| | - Tadashi Matsuda
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan;
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Ichii M, Oritani K, Toda J, Hosen N, Matsuda T, Kanakura Y. Signal-transducing adaptor protein-1 and protein-2 in hematopoiesis and diseases. Exp Hematol 2021; 105:10-17. [PMID: 34780812 DOI: 10.1016/j.exphem.2021.11.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 10/28/2021] [Accepted: 11/08/2021] [Indexed: 11/04/2022]
Abstract
Inflammatory and immune signals are involved in stressed hematopoiesis under myeloablation, infection, chronic inflammation, and aging. These signals also affect malignant pathogenesis, and the dysregulated immune environment which causes the resistance to treatment. On activation, various types of protein tyrosine kinases in the cytoplasm mediate the cascade, leading to the transcription of target genes in the nucleus. Adaptor molecules are commonly defined as proteins that lack enzymatic activity, DNA-binding or receptor functions and possess protein-protein or protein-lipid interaction domains. By binding to specific domains of signaling molecules, adaptor proteins adjust the signaling responses after the ligation of receptors of soluble factors, including cytokines, chemokines, and growth factors, as well as pattern recognition receptors such as toll-like receptors. The signal-transducing adaptor protein (STAP) family regulates various intracellular signaling pathways. These proteins have a pleckstrin homology domain in the N-terminal region and an SRC-homology 2-like domain in the central region, representing typical binding structures as adapter proteins. Following the elucidation of the effects of STAPs on terminally differentiated immune cells, such as macrophages, T cells, mast cells, and basophils, recent findings have indicated the critical roles of STAP-2 in B-cell progenitor cells in marrow under hematopoietic stress and STAP-1 and -2 in BCR-ABL-transduced leukemogenesis. In this review, we focus on the role of STAPs in the bone marrow.
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Affiliation(s)
- Michiko Ichii
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Japan.
| | - Kenji Oritani
- Department of Hematology, Graduate School of Medical Science, International University of Health and Welfare, Narita, Japan
| | - Jun Toda
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Japan
| | - Naoki Hosen
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Japan; Laboratory of Cellular Immunotherapy, World Premier International Immunology Frontier Research Center, Osaka University, Suita, Japan; Integrated Frontier Research for Medical Science Division, Institute for Open and Transdisciplinary Research Initiatives (OTRI), Osaka University, Suita, Japan
| | - Tadashi Matsuda
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
| | - Yuzuru Kanakura
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Japan; Sumitomo Hospital, Osaka, Japan
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Signal-transducing adaptor protein-2 has a nonredundant role for IL-33-triggered mast cell activation. Biochem Biophys Res Commun 2021; 572:80-85. [PMID: 34358967 DOI: 10.1016/j.bbrc.2021.07.098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 07/21/2021] [Accepted: 07/29/2021] [Indexed: 11/22/2022]
Abstract
Signal-transducing adaptor protein (STAP)-2 is one of the STAP family adaptor proteins and ubiquitously expressed in a variety types of cells. Although STAP-2 is required for modification of FcεRI signal transduction in mast cells, other involvement of STAP-2 in mast cell functions is unknown, yet. In the present study, we mainly investigated functional roles of STAP-2 in IL-33-induced mast cell activation. In STAP-2-deficient, but not STAP-1-deficient, mast cells, IL-33-induced IL-6 and TNF-α production was significantly decreased compared with that of wild-type mast cells. In addition, STAP-2-deficiency greatly reduced TLR4-mediated mast cell activation and cytokine production. For the mechanisms, STAP-2 directly binds to IKKα after IL-33 stimulation, leading to elevated NF-κB activity. In conclusion, STAP-2, but not STAP-1, participates in IL-33-induced mast cells activation.
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Matsuda T, Oritani K. STAP-2 Adaptor Protein Regulates Multiple Steps of Immune and Inflammatory Responses. Biol Pharm Bull 2021; 44:895-901. [PMID: 34193686 DOI: 10.1248/bpb.b21-00224] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Signal-transducing adaptor protein (STAP)-2 is an adaptor molecule involved in regulation of several intracellular signaling events in immune cells. STAP-2 contains a pleckstrin homology domain at the N-terminus, an src homology domain in the central portion and a proline-rich region at the C-terminus. STAP-2 also has a YXXQ motif, which is a potential signal transducer and activator of transcription (STAT)3-binding site. STAP-2 influences the STAT3 and STAT5 activity, integrin-mediated T cell adhesion, chemokine-induced T cell migration, Fas-mediated T cell apoptosis, Toll-like receptor-mediated macrophage functions, macrophage colony-stimulating factor-induced macrophage activation, and the high-affinity immunoglobulin E receptor-mediated mast cell activation. This article reviews the current understanding of roles of the STAP-2 during immune and/or inflammatory responses, and discusses possible therapeutic applications of targeting STAP-2 proteins in immune-related disorders.
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Affiliation(s)
- Tadashi Matsuda
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University
| | - Kenji Oritani
- Department of Hematology, International University of Health and Welfare
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Ichii M, Oritani K, Toda J, Saito H, Shi H, Shibayama H, Motooka D, Kitai Y, Muromoto R, Kashiwakura JI, Saitoh K, Okuzaki D, Matsuda T, Kanakura Y. Signal-transducing adaptor protein-2 delays recovery of B lineage lymphocytes during hematopoietic stress. Haematologica 2021; 106:424-436. [PMID: 31974192 PMCID: PMC7849758 DOI: 10.3324/haematol.2019.225573] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Accepted: 01/23/2020] [Indexed: 12/19/2022] Open
Abstract
Signal-transducing adaptor protein-2 (STAP-2) was discovered as a C-FMS/M-CSFR interacting protein and subsequently found to function as an adaptor of signaling or transcription factors. These include STAT5, MyD88 and IB kinase in macrophages, mast cells, and T cells. There is additional information about roles for STAP-2 in several types of malignant diseases including chronic myeloid leukemia; however, none have been reported concerning B-lineage lymphocytes. We have now exploited gene targeted and transgenic mice to address this lack of knowledge, and demonstrated that STAP-2 is not required under normal, steadystate conditions. However, recovery of B cells following transplantation was augmented in the absence of STAP-2. This appeared to be restricted to cells of B-cell lineage with myeloid rebound noted as unremarkable. Furthermore, all hematologic parameters were observed to be normal once recovery from transplantation was complete. In addition, overexpression of STAP-2, specifically in lymphoid cells, resulted in reduced numbers of latestage B-cell progenitors within the bone marrow. While numbers of mature peripheral B and T cells were unaffected, recovery from sub-lethal irradiation or transplantation was dramatically reduced. Lipopolysaccharide (LPS) normally suppresses B precursor expansion in response to interleukin 7; however, STAP-2 deficiency made these cells more resistant. Preliminary RNA-sequencing analyses indicated multiple signaling pathways in B progenitors to be STAP-2-dependent. These findings suggest that STAP-2 modulates formation of B lymphocytes in demand conditions. Further study of this adapter protein could reveal ways to speed recovery of humoral immunity following chemotherapy or transplantation.
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Affiliation(s)
- Michiko Ichii
- Department of Hematology, Oncology, Osaka University Graduate School of Medicine, Suita, Japan
| | - Kenji Oritani
- Department of Hematology, International University of Health and Welfare, Narita, Japan
| | - Jun Toda
- Department of Hematology, Oncology, Osaka University Graduate School of Medicine, Suita, Japan
| | - Hideaki Saito
- Department of Hematology, Oncology, Osaka University Graduate School of Medicine, Suita, Japan
| | - Henyun Shi
- Department of Hematology, Oncology, Osaka University Graduate School of Medicine, Suita, Japan
| | - Hirohiko Shibayama
- Department of Hematology, Oncology, Osaka University Graduate School of Medicine, Suita, Japan
| | - Daisuke Motooka
- Genome Information Research Center, Res Institute for Microbial Diseases, Osaka University, Japan
| | - Yuichi Kitai
- Dept of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
| | - Ryuta Muromoto
- Dept of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
| | - Jun-Ichi Kashiwakura
- Dept of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
| | - Kodai Saitoh
- Dept of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
| | - Daisuke Okuzaki
- Genome Information Research Center, Res Institute for Microbial Diseases, Osaka University, Japan
| | - Tadashi Matsuda
- Dept of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
| | - Yuzuru Kanakura
- Department of Hematology, Oncology, Osaka University Graduate School of Medicine, Suita, Japan
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Drazdauskaitė G, Layhadi JA, Shamji MH. Mechanisms of Allergen Immunotherapy in Allergic Rhinitis. Curr Allergy Asthma Rep 2020; 21:2. [PMID: 33313967 PMCID: PMC7733588 DOI: 10.1007/s11882-020-00977-7] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/24/2020] [Indexed: 12/28/2022]
Abstract
PURPOSE OF REVIEW Allergic rhinitis (AR) is a chronic inflammatory immunoglobulin (Ig) E-mediated disease of the nasal mucosa that can be triggered by the inhalation of seasonal or perennial allergens. Typical symptoms include sneezing, rhinorrhea, nasal itching, nasal congestion and symptoms of allergic conjunctivitis. AR affects a quarter of the population in the United States of America and Europe. RECENT FINDINGS AR has been shown to reduce work productivity in 36-59% of the patients with 20% reporting deteriorated job attendance. Moreover, 42% of children with AR report reduced at-school productivity and lower grades. Most importantly, AR impacts the patient's quality of life, due to sleep deprivation. However, a proportion of patients fails to respond to conventional medication and opts for the allergen immunotherapy (AIT), which currently is the only disease-modifying therapeutic option. AIT can be administered by either subcutaneous (SCIT) or sublingual (SLIT) route. Both routes of administration are safe, effective, and can lead to tolerance lasting years after treatment cessation. Both innate and adaptive immune responses that contribute to allergic inflammation are suppressed by AIT. Innate responses are ameliorated by reducing local mast cell, basophil, eosinophil, and circulating group 2 innate lymphoid cell frequencies which is accompanied by decreased basophil sensitivity. Induction of allergen-specific blocking antibodies, immunosuppressive cytokines, and regulatory T and B cell phenotypes are key pro-tolerogenic adaptive immune responses. CONCLUSION A comprehensive understanding of these mechanisms is necessary for optimal selection of AIT-responsive patients and monitoring treatment efficacy. Moreover, it could inspire novel and more efficient AIT approaches.
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Affiliation(s)
- Gabija Drazdauskaitė
- Immunomodulation and Tolerance Group, Allergy & Clinical Immunology, Inflammation, Repair and Development, National Heart & Lung Institute, Imperial College London, 1st Floor, Room 111, Sir Alexander Fleming Building, South Kensington Campus, London, SW7 2AZ, UK
| | - Janice A Layhadi
- Immunomodulation and Tolerance Group, Allergy & Clinical Immunology, Inflammation, Repair and Development, National Heart & Lung Institute, Imperial College London, 1st Floor, Room 111, Sir Alexander Fleming Building, South Kensington Campus, London, SW7 2AZ, UK
| | - Mohamed H Shamji
- Immunomodulation and Tolerance Group, Allergy & Clinical Immunology, Inflammation, Repair and Development, National Heart & Lung Institute, Imperial College London, 1st Floor, Room 111, Sir Alexander Fleming Building, South Kensington Campus, London, SW7 2AZ, UK.
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Expression of signal-transducing adaptor protein-1 attenuates experimental autoimmune hepatitis via down-regulating activation and homeostasis of invariant natural killer T cells. PLoS One 2020; 15:e0241440. [PMID: 33175848 PMCID: PMC7657518 DOI: 10.1371/journal.pone.0241440] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 10/14/2020] [Indexed: 12/14/2022] Open
Abstract
Objective Signal-transducing adaptor protein (STAP) family members function as adaptor molecules and are involved in several events during immune responses. Notably however, the biological functions of STAP-1 in other cells are not known. We aimed to investigate the functions of STAP-1 in invariant natural killer T (iNKT) cells and iNKT cell-dependent hepatitis. Methods We employed concanavalin A (Con A)-induced hepatitis and α-galactosylceramide (α-GalCer)-induced hepatitis mouse models, both are models of iNKT cell-dependent autoimmune hepatitis, and STAP-1 overexpressing 2E10 cells to investigate the role of STAP-1 in iNKT cell activation in vivo an in vitro, respectively. Results After Con A- or α-GalCer-injection, hepatocyte necrotic areas and plasma alanine aminotransferase elevation were more severe in STAP-1 knockout (S1KO) mice and milder in lymphocyte-specific STAP-1 transgenic (S1Tg) mice, as compared to wild-type (WT) mice. Two events that may be related to Con A-induced and/or α-GalCer-induced hepatitis were influenced by STAP-1 manipulation. One is that iNKT cell populations in the livers and spleens were increased in S1KO mice and were decreased in S1Tg mice. The other is that Con A-induced interleukin-4 and interferon-γ production was attenuated by STAP-1 overexpression. These effects of STAP-1 were confirmed using 2E10 cells overexpressing STAP-1 that showed impairment of interleukin-4 and interferon-γ production as well as phosphorylation of Akt and mitogen-activated protein kinases in response to Con A stimulation. Conclusions These results conclude that STAP-1 regulates iNKT cell maintenance/activation, and is involved in the pathogenesis of autoimmune hepatitis.
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Kashiwakura JI, Yamashita S, Yoshihara M, Inui K, Saitoh K, Sekine Y, Muromoto R, Kitai Y, Oritani K, Matsuda T. STAP-2 positively regulates FcεRI-mediated basophil activation and basophil-dependent allergic inflammatory reactions. Int Immunol 2020; 31:349-356. [PMID: 30726917 DOI: 10.1093/intimm/dxz013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Revised: 01/17/2019] [Accepted: 01/31/2019] [Indexed: 01/03/2023] Open
Abstract
Basophils are an important cell type in the regulation of Th2 immune responses. Recently, we revealed that signal-transducing adaptor protein-2 (STAP-2) negatively regulates mast cell activation via FcεRI. However, the role of STAP-2 in basophil maturation and activation remained unclear. In this study, we demonstrated the normal development of basophils in STAP-2-deficient (STAP-2-/-) mice. We also demonstrated in vitro normal basophil differentiation and FcεRI expression in STAP-2-/- mice, suggesting that STAP-2 is dispensable for basophil maturation. Using bone marrow-derived cultured basophils (BMBs), we showed that degranulation and cytokine production of STAP-2-/- BMBs were lower than those of wild-type (WT) BMBs upon stimulation with IgE/Ag. In accordance with the reduction of degranulation and cytokine production, phosphorylation of several signal molecules such as Lyn, PLC-γ2 and Erk was reduced in STAP-2-/- BMBs after stimulation via FcεRI. Finally, it was observed that IgE-dependent chronic allergic inflammation of STAP-2-/- mice was significantly inhibited compared with WT mice. Taken together, we conclude that STAP-2 is an adaptor molecule that positively regulates FcεRI-mediated basophil activation and basophil-dependent allergic inflammatory reactions.
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Affiliation(s)
- Jun-Ichi Kashiwakura
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita-12 Nishi-6, Kita-Ku, Sapporo 060-0812, Japan
| | - Shinsuke Yamashita
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita-12 Nishi-6, Kita-Ku, Sapporo 060-0812, Japan
| | - Mari Yoshihara
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita-12 Nishi-6, Kita-Ku, Sapporo 060-0812, Japan
| | - Kyosuke Inui
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita-12 Nishi-6, Kita-Ku, Sapporo 060-0812, Japan
| | - Kodai Saitoh
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita-12 Nishi-6, Kita-Ku, Sapporo 060-0812, Japan
| | - Yuichi Sekine
- Program in Cellular Neuroscience, Neurodegeneration & Repair, Yale University School of Medicine, New Haven, CT 06536, USA
| | - Ryuta Muromoto
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita-12 Nishi-6, Kita-Ku, Sapporo 060-0812, Japan
| | - Yuichi Kitai
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita-12 Nishi-6, Kita-Ku, Sapporo 060-0812, Japan
| | - Kenji Oritani
- Department of Hematology, International University of Health and Welfare, 4-3 Kouzunomori, Narita, Chiba 286-8686, Japan
| | - Tadashi Matsuda
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita-12 Nishi-6, Kita-Ku, Sapporo 060-0812, Japan
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Imperatorin Suppresses Anaphylactic Reaction and IgE-Mediated Allergic Responses by Inhibiting Multiple Steps of FceRI Signaling in Mast Cells: IMP Alleviates Allergic Responses in PCA. BIOMED RESEARCH INTERNATIONAL 2019; 2019:7823761. [PMID: 30800677 PMCID: PMC6360561 DOI: 10.1155/2019/7823761] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 11/27/2018] [Indexed: 12/17/2022]
Abstract
This study is to investigate the effects of imperatorin (IMP) on allergic responses mediated by mast cells, both in vitro and in vivo. Passive cutaneous anaphylaxis (PCA) model was established. Histological detection was performed to assess the ear histology. ELISA and Western blot analysis were used to detect the levels of corresponding cytokines and signalling pathway proteins. IMP decreased the leakage of Evans blue and the ear thickness in the PCA models, in a dose-dependent manner, and alleviated the degranulation of mast cells. Moreover, IMP reduced the expression of TNF-α, IL-4, IL-1β, IL-8, and IL-13. Furthermore, IMP inhibited the phosphorylation levels of Syk, Lyn, PLC-γ1, and Gab2, as well as the downstream MAPK, PI3K/AKT, and NF-κB signaling pathways. In addition, IMP inhibited the mast cell-mediated allergic responses through the Nrf2/HO-1 pathway. IMP attenuates the allergic responses through inhibiting the degranulation and decreasing the expression levels of proinflammatory cytokines in the mast cells, involving the PI3K/Akt, MAPK, NF-κB, and Nrf2/HO-1 pathways.
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14
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Kitai Y, Iwakami M, Saitoh K, Togi S, Isayama S, Sekine Y, Muromoto R, Kashiwakura JI, Yoshimura A, Oritani K, Matsuda T. STAP-2 protein promotes prostate cancer growth by enhancing epidermal growth factor receptor stabilization. J Biol Chem 2017; 292:19392-19399. [PMID: 28986450 DOI: 10.1074/jbc.m117.802884] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2017] [Revised: 10/03/2017] [Indexed: 11/06/2022] Open
Abstract
Signal-transducing adaptor family member-2 (STAP-2) is an adaptor protein that regulates various intracellular signaling pathways and promotes tumorigenesis in melanoma and breast cancer cells. However, the contribution of STAP-2 to the behavior of other types of cancer cells is unclear. Here, we show that STAP-2 promotes tumorigenesis of prostate cancer cells through up-regulation of EGF receptor (EGFR) signaling. Tumor growth of a prostate cancer cell line, DU145, was strongly decreased by STAP-2 knockdown. EGF-induced gene expression and phosphorylation of AKT, ERK, and STAT3 were significantly decreased in STAP-2-knockdown DU145 cells. Mechanistically, we found that STAP-2 interacted with EGFR and enhanced its stability by inhibiting c-CBL-mediated EGFR ubiquitination. Our results indicate that STAP-2 promotes prostate cancer progression via facilitating EGFR activation.
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Affiliation(s)
- Yuichi Kitai
- From the Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-Ku, Sapporo, Hokkaido 060-0812
| | - Masashi Iwakami
- From the Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-Ku, Sapporo, Hokkaido 060-0812
| | - Kodai Saitoh
- From the Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-Ku, Sapporo, Hokkaido 060-0812
| | - Sumihito Togi
- From the Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-Ku, Sapporo, Hokkaido 060-0812
| | - Serina Isayama
- From the Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-Ku, Sapporo, Hokkaido 060-0812
| | - Yuichi Sekine
- From the Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-Ku, Sapporo, Hokkaido 060-0812
| | - Ryuta Muromoto
- From the Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-Ku, Sapporo, Hokkaido 060-0812
| | - Jun-Ichi Kashiwakura
- From the Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-Ku, Sapporo, Hokkaido 060-0812
| | - Akihiko Yoshimura
- the the Department of Microbiology and Immunology, Keio University School of Medicine, Tokyo 160-8582, and
| | - Kenji Oritani
- the Department of Hematology, International University of Health and Welfare, 4-3 Kouzunomori, Narita, Chiba 286-8686, Japan
| | - Tadashi Matsuda
- From the Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-Ku, Sapporo, Hokkaido 060-0812,
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Saitoh K, Tsuchiya T, Kashiwakura JI, Muromoto R, Kitai Y, Sekine Y, Oritani K, Matsuda T. STAP-2 interacts with Pyk2 and enhances Pyk2 activity in T-cells. Biochem Biophys Res Commun 2017; 488:81-87. [DOI: 10.1016/j.bbrc.2017.05.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 05/02/2017] [Indexed: 01/10/2023]
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16
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Kubo K, Iwakami M, Muromoto R, Inagaki T, Kitai Y, Kon S, Sekine Y, Oritani K, Matsuda T. CCR7 is involved in BCR-ABL/STAP-2-mediated cell growth in hematopoietic Ba/F3 cells. Biochem Biophys Res Commun 2015; 463:825-31. [PMID: 26102025 DOI: 10.1016/j.bbrc.2015.06.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Accepted: 06/03/2015] [Indexed: 11/30/2022]
Abstract
Chronic myeloid leukemia is a clonal disease characterized by the presence of the Philadelphia chromosome and its oncogenic product, BCR-ABL, which activates multiple pathways involved in cell survival, growth promotion, and disease progression. We previously reported that in murine hematopoietic Ba/F3 cells, signal transducing adaptor protein-2 (STAP-2) binds to BCR-ABL and up-regulates BCR-ABL phosphorylation, leading to enhanced activation of its downstream signaling molecules. The binding of STAP-2 to BCR-ABL also influenced the expression levels of chemokine receptors, such as CXCR4 and CCR7. For the induction of CCR7 expression, signals mediated by the MAPK/ERK pathway were critical in Ba/F3 cells expressing BCR-ABL and STAP-2. In addition, STAP-2 cooperated with BCR-ABL to induce the production of CCR7 ligands, CCL19 and CCL21. Our results demonstrate a contribution of CCR7 to STAP-2-dependent enhancement of BCR-ABL-mediated cell growth in Ba/F3 cells.
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Affiliation(s)
- Kaori Kubo
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Masashi Iwakami
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Ryuta Muromoto
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Takuya Inagaki
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Yuichi Kitai
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Shigeyuki Kon
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Yuichi Sekine
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Kenji Oritani
- Department of Hematology and Oncology, Graduate School of Medicine, Osaka University, 2-2 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Tadashi Matsuda
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan.
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Sekine Y, Togi S, Muromoto R, Kon S, Kitai Y, Yoshimura A, Oritani K, Matsuda T. STAP-2 Protein Expression in B16F10 Melanoma Cells Positively Regulates Protein Levels of Tyrosinase, Which Determines Organs to Infiltrate in the Body. J Biol Chem 2015; 290:17462-73. [PMID: 26023234 DOI: 10.1074/jbc.m115.658575] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Indexed: 12/14/2022] Open
Abstract
Melanoma is the most serious type of skin cancer, with a highly metastatic phenotype. In this report, we show that signal transducing adaptor protein 2 (STAP-2) is involved in cell migration, proliferation, and melanogenesis as well as chemokine receptor expression and tumorigenesis in B16F10 melanoma cells. This was evident in mice injected with STAP-2 shRNA (shSTAP-2)-expressing B16F10 cells, which infiltrated organs in a completely different pattern from the original cells, showing massive colonization in the liver, kidney, and neck but not in the lung. The most important finding was that STAP-2 expression determined tyrosinase protein content. STAP-2 colocalized with tyrosinase in lysosomes and protected tyrosinase from protein degradation. It is noteworthy that B16F10 cells with knocked down tyrosinase showed similar cell characteristics as shSTAP-2 cells. These results indicated that tyrosinase contributed to some cellular events beyond melanogenesis. Taken together, one possibility is that STAP-2 positively regulates the protein levels of tyrosinase, which determines tumor invasion via controlling chemokine receptor expression.
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Affiliation(s)
- Yuichi Sekine
- From the Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita-12 Nishi-6, Kita-Ku, Sapporo, 060-0812, Japan
| | - Sumihito Togi
- From the Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita-12 Nishi-6, Kita-Ku, Sapporo, 060-0812, Japan
| | - Ryuta Muromoto
- From the Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita-12 Nishi-6, Kita-Ku, Sapporo, 060-0812, Japan
| | - Shigeyuki Kon
- From the Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita-12 Nishi-6, Kita-Ku, Sapporo, 060-0812, Japan
| | - Yuichi Kitai
- From the Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita-12 Nishi-6, Kita-Ku, Sapporo, 060-0812, Japan
| | - Akihiko Yoshimura
- the Department of Microbiology and Immunology, Keio University School of Medicine, Shinjuku-Ku, Tokyo 160-8582, Japan
| | - Kenji Oritani
- the Department of Hematology and Oncology, Graduate School of Medicine, Osaka University, 2-2 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Tadashi Matsuda
- From the Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita-12 Nishi-6, Kita-Ku, Sapporo, 060-0812, Japan,
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