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Otani Y, Katayama H, Zhu Y, Huang R, Shigehira T, Shien K, Suzawa K, Yamamoto H, Shien T, Toyooka S, Fujimura A. Adrenergic microenvironment driven by cancer-associated Schwann cells contributes to chemoresistance in patients with lung cancer. Cancer Sci 2024. [PMID: 38676373 DOI: 10.1111/cas.16164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Revised: 03/06/2024] [Accepted: 03/12/2024] [Indexed: 04/28/2024] Open
Abstract
Doublecortin (DCX)-positive neural progenitor-like cells are purported components of the cancer microenvironment. The number of DCX-positive cells in tissues reportedly correlates with cancer progression; however, little is known about the mechanism by which these cells affect cancer progression. Here we demonstrated that DCX-positive cells, which are found in all major histological subtypes of lung cancer, are cancer-associated Schwann cells (CAS) and contribute to the chemoresistance of lung cancer cells by establishing an adrenergic microenvironment. Mechanistically, the activation of the Hippo transducer YAP/TAZ was involved in the acquisition of new traits of CAS and DCX positivity. We further revealed that CAS express catecholamine-synthesizing enzymes and synthesize adrenaline, which potentiates the chemoresistance of lung cancer cells through the activation of YAP/TAZ. Our findings shed light on CAS, which drive the formation of an adrenergic microenvironment by the reciprocal regulation of YAP/TAZ in lung cancer tissues.
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Affiliation(s)
- Yusuke Otani
- Department of General Thoracic Surgery and Breast and Endocrinological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Kita-ku, Okayama, Japan
- Department of Pathology, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
| | - Haruyoshi Katayama
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Kita-ku, Okayama, Japan
| | - Yidan Zhu
- Department of General Thoracic Surgery and Breast and Endocrinological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Kita-ku, Okayama, Japan
| | - Rongsheng Huang
- Department of Trauma Orthopedics, The Second Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - Takafumi Shigehira
- Department of Cellular Physiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Kita-ku, Okayama, Japan
| | - Kazuhiko Shien
- Department of General Thoracic Surgery and Breast and Endocrinological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Kita-ku, Okayama, Japan
| | - Ken Suzawa
- Department of General Thoracic Surgery and Breast and Endocrinological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Kita-ku, Okayama, Japan
| | - Hiromasa Yamamoto
- Department of General Thoracic Surgery and Breast and Endocrinological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Kita-ku, Okayama, Japan
| | - Tadahiko Shien
- Department of General Thoracic Surgery and Breast and Endocrinological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Kita-ku, Okayama, Japan
| | - Shinichi Toyooka
- Department of General Thoracic Surgery and Breast and Endocrinological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Kita-ku, Okayama, Japan
| | - Atsushi Fujimura
- Department of Cellular Physiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Kita-ku, Okayama, Japan
- Neutron Therapy Research Center, Okayama University, Kita-ku, Okayama, Japan
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Katayama H, Fujimura A, Huang R, Otani Y, Itano T, Fujiwara T, Kunisada T, Nakata E, Ozaki T. Role of catecholamine synthases in the maintenance of cancer stem-like cells in malignant peripheral nerve sheath tumors. Cancer Sci 2024; 115:871-882. [PMID: 38279513 PMCID: PMC10921001 DOI: 10.1111/cas.16077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 12/08/2023] [Accepted: 12/30/2023] [Indexed: 01/28/2024] Open
Abstract
Malignant peripheral nerve sheath tumors (MPNSTs) are malignant tumors that are derived from Schwann cell lineage around peripheral nerves. As in many other cancer types, cancer stem cells (CSCs) have been identified in MPNSTs, and they are considered the cause of treatment resistance, recurrence, and metastasis. As an element defining the cancer stemness of MPNSTs, we previously reported a molecular mechanism by which exogenous adrenaline activates a core cancer stemness factor, YAP/TAZ, through β2 adrenoceptor (ADRB2). In this study, we found that MPNST cells express catecholamine synthases and that these enzymes are essential for maintaining cancer stemness, such as the ability to self-renew and maintain an undifferentiated state. Through gene knockdown and inhibition of these enzymes, we confirmed that catecholamines are indeed synthesized in MPNST cells. The results confirmed that catecholamine synthase knockdown in MPNST cells reduces the activity of YAP/TAZ. These data suggest that a mechanism of YAP/TAZ activation by de novo synthesized adrenaline, as well as exogenous adrenaline, may exist in the maintenance of cancer stemness of MPNST cells. This mechanism not only helps to understand the pathology of MPNST, but could also contribute to the development of therapeutic strategies for MPNST.
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Affiliation(s)
- Haruyoshi Katayama
- Department of Orthopedic SurgeryOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesOkayamaJapan
| | - Atsushi Fujimura
- Department of Cellular PhysiologyOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesOkayamaJapan
- Neutron Therapy Research CenterOkayama UniversityOkayamaJapan
| | - Rongsheng Huang
- Department of Trauma OrthopedicsThe Second Hospital of Dalian Medical UniversityDalianChina
| | - Yusuke Otani
- Department of General Thoracic Surgery and Breast and Endocrinological SurgeryOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesOkayamaJapan
| | - Takuto Itano
- Department of Orthopedic SurgeryOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesOkayamaJapan
| | - Tomohiro Fujiwara
- Department of Orthopedic SurgeryOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesOkayamaJapan
| | - Toshiyuki Kunisada
- Department of Orthopedic SurgeryOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesOkayamaJapan
| | - Eiji Nakata
- Department of Orthopedic SurgeryOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesOkayamaJapan
| | - Toshifumi Ozaki
- Department of Orthopedic SurgeryOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesOkayamaJapan
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Otani Y, Yoshikawa S, Nagao K, Tanaka T, Toyooka S, Fujimura A. Connective tissue mast cells store and release noradrenaline. J Physiol Sci 2023; 73:24. [PMID: 37828465 DOI: 10.1186/s12576-023-00883-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 10/04/2023] [Indexed: 10/14/2023]
Abstract
Mast cells are present in mucosal and connective tissues throughout the body. They synthesize and release a wide variety of bioactive molecules, such as histamine, proteases, and cytokines. In this study, we found that a population of connective tissue mast cells (CTMCs) stores and releases noradrenaline, originating from sympathetic nerves. Noradrenaline-storing cells, not neuronal fibers, were predominantly identified in the connective tissues of the skin, mammary gland, gastrointestinal tract, bronchus, thymus, and pancreas in wild-type mice but were absent in mast cell-deficient W-sash c-kit mutant KitW-sh/W-sh mice. In vitro studies using bone marrow-derived mast cells revealed that extracellular noradrenaline was taken up but not synthesized. Upon ionomycin stimulation, noradrenaline was released. Electron microscopy analyses further suggested that noradrenaline is stored in and released from the secretory granules of mast cells. Finally, we found that noradrenaline-storing CTMCs express organic cation transporter 3 (Oct3), which is also known as an extraneuronal monoamine transporter, SLC22A3. Our findings indicate that mast cells may play a role in regulating noradrenaline concentration by storing and releasing it in somatic tissues.
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Affiliation(s)
- Yusuke Otani
- Department of General Thoracic Surgery and Breast and Endocrinological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Soichiro Yoshikawa
- Department of Cellular Physiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-Cho, Kita-Ku, Okayama, 700-8558, Japan
| | - Kei Nagao
- Department of Cellular Physiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-Cho, Kita-Ku, Okayama, 700-8558, Japan
| | - Takehiro Tanaka
- Department of Pathology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Shinichi Toyooka
- Department of General Thoracic Surgery and Breast and Endocrinological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Atsushi Fujimura
- Department of Cellular Physiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-Cho, Kita-Ku, Okayama, 700-8558, Japan.
- Neutron Therapy Research Center, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan.
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Huang R, Yamamoto T, Nakata E, Ozaki T, Kurozumi K, Wei F, Tomizawa K, Fujimura A. CDKAL1 Drives the Maintenance of Cancer Stem-Like Cells by Assembling the eIF4F Translation Initiation Complex. Adv Sci (Weinh) 2023; 10:e2206542. [PMID: 36786012 PMCID: PMC10131790 DOI: 10.1002/advs.202206542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 01/06/2023] [Indexed: 06/18/2023]
Abstract
Cancer stem-like cells (CSCs) have a unique translation mode, but little is understood about the process of elongation, especially the contribution of tRNA modifications to the maintenance of CSCs properties. Here, it is reported that, contrary to the initial aim, a tRNA-modifying methylthiotransferase CDKAL1 promotes CSC-factor SALL2 synthesis by assembling the eIF4F translation initiation complex. CDKAL1 expression is upregulated in patients with worse prognoses and is essential for maintaining CSCs in rhabdomyosarcoma (RMS) and common cancers. Translatome analysis reveals that a group of mRNAs whose translation is CDKAL1-dependent contains cytosine-rich sequences in the 5' untranslated region (5'UTR). Mechanistically, CDKAL1 promotes the translation of such mRNAs by organizing the eIF4F translation initiation complex. This complex formation does not require the enzyme activity of CDKAL1 but requires only the NH2 -terminus domain of CDKAL1. Furthermore, sites in CDKAL1 essential for forming the eIF4F complex are identified and discovered candidate inhibitors of CDKAL1-dependent translation.
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Affiliation(s)
- Rongsheng Huang
- Department of Cellular PhysiologyOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesOkayamaOkayama700‐8558Japan
| | - Takahiro Yamamoto
- Department of Molecular PhysiologyKumamoto University Faculty of Life SciencesKumamotoKumamoto860‐0811Japan
| | - Eiji Nakata
- Department of Orthopedic SurgeryOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesOkayamaOkayama700‐8558Japan
| | - Toshifumi Ozaki
- Department of Orthopedic SurgeryOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesOkayamaOkayama700‐8558Japan
| | - Kazuhiko Kurozumi
- Department of NeurosurgeryHamamatsu University School of MedicineHamamatsuShizuoka431‐3192Japan
| | - Fanyan Wei
- Department of Modomics Biology and MedicineInstitute of Development, Aging and CancerTohoku UniversitySendaiMiyagi980‐8575Japan
| | - Kazuhito Tomizawa
- Department of Molecular PhysiologyKumamoto University Faculty of Life SciencesKumamotoKumamoto860‐0811Japan
| | - Atsushi Fujimura
- Department of Cellular PhysiologyOkayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesOkayamaOkayama700‐8558Japan
- Neutron Therapy Research CenterOkayama UniversityOkayamaOkayama700‐8558Japan
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Huang R, Fujimura A, Nakata E, Takihira S, Inoue H, Yoshikawa S, Hiyama T, Ozaki T, Kamiya A. Adrenergic signaling promotes the expansion of cancer stem-like cells of malignant peripheral nerve sheath tumors. Biochem Biophys Res Commun 2021; 557:199-205. [PMID: 33872989 DOI: 10.1016/j.bbrc.2021.03.172] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 03/29/2021] [Accepted: 03/31/2021] [Indexed: 12/14/2022]
Abstract
Malignant peripheral nerve sheath tumor (MPNST), a highly malignant tumor that arises in peripheral nerve tissues, is known to be highly resistant to radiation and chemotherapy. Although there are several reports on genetic mutations and epigenetic changes that define the pathogenesis of MPNST, there is insufficient information regarding the microenvironment that contributes to the malignancy of MPNST. In the present study, we demonstrate that adrenaline increases the cancer stem cell population in MPNST. This effect is mediated by adrenaline stimulation of beta-2 adrenergic receptor (ADRB2), which activates the Hippo transducer, YAP/TAZ. Inhibition and RNAi experiments revealed that inhibition of ADRB2 attenuated the adrenaline-triggered activity of YAP/TAZ and subsequently attenuated MPNST cells stemness. Furthermore, ADRB2-YAP/TAZ axis was confirmed in the MPNST patients' specimens. The prognosis of patients with high levels of ADRB2 was found to be significantly worse. These data show that adrenaline exacerbates MPNST prognosis and may aid the development of new treatment strategies for MPNST.
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Affiliation(s)
- Rongsheng Huang
- Department of Cellular Physiology, Okayama University Academic Field of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Atsushi Fujimura
- Department of Cellular Physiology, Okayama University Academic Field of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan; Neutron Therapy Research Center, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan.
| | - Eiji Nakata
- Department of Orthopedic Surgery, Okayama University Academic Field of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Shota Takihira
- Department of Orthopedic Surgery, Okayama University Academic Field of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Hirofumi Inoue
- Department of Clinical Genetics and Genomic Medicine, Okayama University Academic Field of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Soichiro Yoshikawa
- Department of Cellular Physiology, Okayama University Academic Field of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Takeshi Hiyama
- Department of Cellular Physiology, Okayama University Academic Field of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Toshifumi Ozaki
- Department of Orthopedic Surgery, Okayama University Academic Field of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Atsunori Kamiya
- Department of Cellular Physiology, Okayama University Academic Field of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
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Uneda A, Kurozumi K, Fujimura A, Fujii K, Ishida J, Shimazu Y, Otani Y, Tomita Y, Hattori Y, Matsumoto Y, Tsuboi N, Makino K, Hirano S, Kamiya A, Date I. Differentiated glioblastoma cells accelerate tumor progression by shaping the tumor microenvironment via CCN1-mediated macrophage infiltration. Acta Neuropathol Commun 2021; 9:29. [PMID: 33618763 PMCID: PMC7898455 DOI: 10.1186/s40478-021-01124-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 01/30/2021] [Indexed: 11/10/2022] Open
Abstract
Glioblastoma (GBM) is the most lethal primary brain tumor characterized by significant cellular heterogeneity, namely tumor cells, including GBM stem-like cells (GSCs) and differentiated GBM cells (DGCs), and non-tumor cells such as endothelial cells, vascular pericytes, macrophages, and other types of immune cells. GSCs are essential to drive tumor progression, whereas the biological roles of DGCs are largely unknown. In this study, we focused on the roles of DGCs in the tumor microenvironment. To this end, we extracted DGC-specific signature genes from transcriptomic profiles of matched pairs of in vitro GSC and DGC models. By evaluating the DGC signature using single cell data, we confirmed the presence of cell subpopulations emulated by in vitro culture models within a primary tumor. The DGC signature was correlated with the mesenchymal subtype and a poor prognosis in large GBM cohorts such as The Cancer Genome Atlas and Ivy Glioblastoma Atlas Project. In silico signaling pathway analysis suggested a role of DGCs in macrophage infiltration. Consistent with in silico findings, in vitro DGC models promoted macrophage migration. In vivo, coimplantation of DGCs and GSCs reduced the survival of tumor xenograft-bearing mice and increased macrophage infiltration into tumor tissue compared with transplantation of GSCs alone. DGCs exhibited a significant increase in YAP/TAZ/TEAD activity compared with GSCs. CCN1, a transcriptional target of YAP/TAZ, was selected from the DGC signature as a candidate secreted protein involved in macrophage recruitment. In fact, CCN1 was secreted abundantly from DGCs, but not GSCs. DGCs promoted macrophage migration in vitro and macrophage infiltration into tumor tissue in vivo through secretion of CCN1. Collectively, these results demonstrate that DGCs contribute to GSC-dependent tumor progression by shaping a mesenchymal microenvironment via CCN1-mediated macrophage infiltration. This study provides new insight into the complex GBM microenvironment consisting of heterogeneous cells.
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Castellan M, Guarnieri A, Fujimura A, Zanconato F, Battilana G, Panciera T, Sladitschek HL, Contessotto P, Citron A, Grilli A, Romano O, Bicciato S, Fassan M, Porcù E, Rosato A, Cordenonsi M, Piccolo S. Single-cell analyses reveal YAP/TAZ as regulators of stemness and cell plasticity in Glioblastoma. Nat Cancer 2021; 2:174-188. [PMID: 33644767 PMCID: PMC7116831 DOI: 10.1038/s43018-020-00150-z] [Citation(s) in RCA: 67] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 10/28/2020] [Indexed: 02/07/2023]
Abstract
Glioblastoma (GBM) is a devastating human malignancy. GBM stem-like cells (GSCs) drive tumor initiation and progression. Yet, the molecular determinants defining GSCs in their native state in patients remain poorly understood. Here we used single cell datasets and identified GSCs at the apex of the differentiation hierarchy of GBM. By reconstructing the GSCs' regulatory network, we identified the YAP/TAZ coactivators as master regulators of this cell state, irrespectively of GBM subtypes. YAP/TAZ are required to install GSC properties in primary cells downstream of multiple oncogenic lesions, and required for tumor initiation and maintenance in vivo in different mouse and human GBM models. YAP/TAZ act as main roadblock of GSC differentiation and their inhibition irreversibly lock differentiated GBM cells into a non-tumorigenic state, preventing plasticity and regeneration of GSC-like cells. Thus, GSC identity is linked to a key molecular hub integrating genetics and microenvironmental inputs within the multifaceted biology of GBM.
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Affiliation(s)
| | | | - Atsushi Fujimura
- Department of Molecular Medicine, University of Padua, Padua, Italy
| | | | - Giusy Battilana
- Department of Molecular Medicine, University of Padua, Padua, Italy
| | - Tito Panciera
- Department of Molecular Medicine, University of Padua, Padua, Italy
| | | | | | - Anna Citron
- Department of Molecular Medicine, University of Padua, Padua, Italy
| | - Andrea Grilli
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Oriana Romano
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Silvio Bicciato
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Matteo Fassan
- Department of Medicine - Surgical Pathology and Cytopathology Unit, University of Padua, Padua, Italy
| | - Elena Porcù
- Department of Woman and Children Health, University of Padua, Padua, Italy
| | - Antonio Rosato
- Department of Surgery, Oncology and Gastroenterology, University of Padua, Padua, Italy
- Veneto Institute of Oncology IOV-IRCCS, Padua, Italy
| | | | - Stefano Piccolo
- Department of Molecular Medicine, University of Padua, Padua, Italy.
- IFOM, the FIRC Institute of Molecular Oncology, Milan, Italy.
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Fujimura A, Pei H, Zhang H, Sladitschek HL, Chang L. Editorial: The Role of Epigenetic Modifications in Cancer Progression. Front Oncol 2021; 10:617178. [PMID: 33489924 PMCID: PMC7820891 DOI: 10.3389/fonc.2020.617178] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 11/27/2020] [Indexed: 11/25/2022] Open
Affiliation(s)
- Atsushi Fujimura
- Department of Cellular Physiology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences; Neutron Therapy Research Center, Okayama University, Okayama, Japan
| | - Hailong Pei
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Medical College of Soochow University, Suzhou, China
| | - Hongquan Zhang
- Department of Human Anatomy, Histology and Embryology, Key Laboratory of Carcinogenesis and Translational Research, Ministry of Education, and State Key Laboratory of Natural and Biomimetic Drugs, Peking University Health Science Center, Beijing, China
| | | | - Lei Chang
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Medical College of Soochow University, Suzhou, China
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Wepfer PH, Nakajima Y, Sutthacheep M, Radice VZ, Richards Z, Ang P, Terraneo T, Sudek M, Fujimura A, Toonen RJ, Mikheyev AS, Economo EP, Mitarai S. Evolutionary biogeography of the reef-building coral genus Galaxea across the Indo-Pacific ocean. Mol Phylogenet Evol 2020; 151:106905. [DOI: 10.1016/j.ympev.2020.106905] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 06/24/2020] [Accepted: 07/01/2020] [Indexed: 11/16/2022]
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Fujimura A, Yasui S, Igawa K, Ueda A, Watanabe K, Hanafusa T, Ichikawa Y, Yoshihashi S, Tsuchida K, Kamiya A, Furuya S. In Vitro Studies to Define the Cell-Surface and Intracellular Targets of Polyarginine-Conjugated Sodium Borocaptate as a Potential Delivery Agent for Boron Neutron Capture Therapy. Cells 2020; 9:cells9102149. [PMID: 32977522 PMCID: PMC7598271 DOI: 10.3390/cells9102149] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 09/18/2020] [Accepted: 09/21/2020] [Indexed: 12/16/2022] Open
Abstract
Boron neutron capture therapy (BNCT) requires pharmaceutical innovations and molecular-based evidence of effectiveness to become a standard cancer therapeutic in the future. Recently, in Japan, 4-borono-L-phenylalanine (BPA) was approved as a boron agent for BNCT against head and neck (H&N) cancers. H&N cancer appears to be a suitable target for BPA-BNCT, because the expression levels of L-type amino acid transporter 1 (LAT1), one of the amino acid transporters responsible for BPA uptake, are elevated in most cases of H&N cancer. However, in other types of cancer including malignant brain tumors, LAT1 is not always highly expressed. To expand the possibility of BNCT for these cases, we previously developed poly-arginine peptide (polyR)-conjugated mercaptoundecahydrododecaborate (BSH). PolyR confers the cell membrane permeability and tumor selectivity of BSH. However, the molecular determinants for the properties are not fully understood. In this present study, we have identified the cluster of differentiation 44 (CD44) protein and translational machinery proteins as a major cell surface target and intracellular targets of BSH-polyR, respectively. CD44, also known as a stem cell-associated maker in various types of cancer, is required for the cellular uptake of polyR-conjugated molecules. We showed that BSH-polyR was predominantly delivered to a CD44High cell population of cancer cells. Once delivered, BSH-polyR interacted with the translational machinery components, including the initiation factors, termination factors, and poly(A)-biding protein (PABP). As a proof of principle, we performed BSH-polyR-based BNCT against glioma stem-like cells and revealed that BSH-polyR successfully induced BNCT-dependent cell death specifically in CD44High cells. Bioinformatics analysis indicated that BSH-polyR would be suitable for certain types of malignant tumors. Our results shed light on the biochemical properties of BSH-polyR, which may further contribute to the therapeutic optimization of BSH-BNCT in the future.
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Affiliation(s)
- Atsushi Fujimura
- Department of Physiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan;
- Neutron Therapy Research Center, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan; (S.Y.); (K.I.); (A.U.); (K.W.); (T.H.); (Y.I.); (S.F.)
- Correspondence: ; Tel.: +81-86-235-7105
| | - Seiji Yasui
- Neutron Therapy Research Center, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan; (S.Y.); (K.I.); (A.U.); (K.W.); (T.H.); (Y.I.); (S.F.)
| | - Kazuyo Igawa
- Neutron Therapy Research Center, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan; (S.Y.); (K.I.); (A.U.); (K.W.); (T.H.); (Y.I.); (S.F.)
| | - Ai Ueda
- Neutron Therapy Research Center, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan; (S.Y.); (K.I.); (A.U.); (K.W.); (T.H.); (Y.I.); (S.F.)
| | - Kaori Watanabe
- Neutron Therapy Research Center, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan; (S.Y.); (K.I.); (A.U.); (K.W.); (T.H.); (Y.I.); (S.F.)
| | - Tadashi Hanafusa
- Neutron Therapy Research Center, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan; (S.Y.); (K.I.); (A.U.); (K.W.); (T.H.); (Y.I.); (S.F.)
| | - Yasuaki Ichikawa
- Neutron Therapy Research Center, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan; (S.Y.); (K.I.); (A.U.); (K.W.); (T.H.); (Y.I.); (S.F.)
| | - Sachiko Yoshihashi
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan; (S.Y.); (K.T.)
| | - Kazuki Tsuchida
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan; (S.Y.); (K.T.)
| | - Atsunori Kamiya
- Department of Physiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan;
| | - Shuichi Furuya
- Neutron Therapy Research Center, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan; (S.Y.); (K.I.); (A.U.); (K.W.); (T.H.); (Y.I.); (S.F.)
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Fushimi K, Kanazawa T, Fujimura A, Kitagawa Y, Hasegawa Y, Doi T. Effect of intentional convection on the passivity of an Fe–6Cr surface in pH 4.5 Na2SO4 solution. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136237] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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12
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Matsumoto Y, Ichikawa T, Kurozumi K, Otani Y, Fujimura A, Fujii K, Tomita Y, Hattori Y, Uneda A, Tsuboi N, Kaneda K, Makino K, Date I. Annexin A2-STAT3-Oncostatin M receptor axis drives phenotypic and mesenchymal changes in glioblastoma. Acta Neuropathol Commun 2020; 8:42. [PMID: 32248843 PMCID: PMC7132881 DOI: 10.1186/s40478-020-00916-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 03/13/2020] [Indexed: 12/14/2022] Open
Abstract
Glioblastoma (GBM) is characterized by extensive tumor cell invasion, angiogenesis, and proliferation. We previously established subclones of GBM cells with distinct invasive phenotypes and identified annexin A2 (ANXA2) as an activator of angiogenesis and perivascular invasion. Here, we further explored the role of ANXA2 in regulating phenotypic transition in GBM. We identified oncostatin M receptor (OSMR) as a key ANXA2 target gene in GBM utilizing microarray analysis and hierarchical clustering analysis of the Ivy Glioblastoma Atlas Project and The Cancer Genome Atlas datasets. Overexpression of ANXA2 in GBM cells increased the expression of OSMR and phosphorylated signal transducer and activator of transcription 3 (STAT3) and enhanced cell invasion, angiogenesis, proliferation, and mesenchymal transition. Silencing of OSMR reversed the ANXA2-induced phenotype, and STAT3 knockdown reduced OSMR protein expression. Exposure of GBM cells to hypoxic conditions activated the ANXA2–STAT3–OSMR signaling axis. Mice bearing ANXA2-overexpressing GBM exhibited shorter survival times compared with control tumor-bearing mice, whereas OSMR knockdown increased the survival time and diminished ANXA2-mediated tumor invasion, angiogenesis, and growth. Further, we uncovered a significant relationship between ANXA2 and OSMR expression in clinical GBM specimens, and demonstrated their correlation with tumor histopathology and patient prognosis. Our results indicate that the ANXA2–STAT3–OSMR axis regulates malignant phenotypic changes and mesenchymal transition in GBM, suggesting that this axis is a promising therapeutic target to treat GBM aggressiveness.
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Uneda A, Kurozumi K, Fujimura A, Kamiya A, Hirose T, Yanai H, Date I. Intracranial Mesenchymal Chondrosarcoma Lacking the Typical Histopathological Features Diagnosed by HEY1-NCOA2 Gene Fusion. NMC Case Rep J 2020; 7:47-52. [PMID: 32322450 PMCID: PMC7162808 DOI: 10.2176/nmccrj.cr.2019-0123] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 08/13/2019] [Indexed: 11/20/2022] Open
Abstract
Intracranial mesenchymal chondrosarcoma (MCS) is a rare neoplasm. The diagnosis of MCS is confirmed by the presence of a biphasic pattern on histological examination, comprising undifferentiated small round cells admixed with islands of well-differentiated hyaline cartilage; however, a differential diagnosis may be challenging in some cases. A 28-year-old woman with a 2-month history of headache was referred to our hospital. Radiologic studies showed an extra-axial lobulated mass composed of calcified and uncalcified areas occupying the left middle fossa. Surgical resection was planned, but her headache suddenly worsened before her planned hospital admission and she was admitted as an emergency. Radiologic studies showed an acute hemorrhage in the uncalcified part of the mass. The mass was resected via the left zygomatic approach after embolization of the feeder vessels. The most likely histopathological diagnosis was MCS. However, the typical bimorphic pattern was not identified in our surgical samples; each undifferentiated area and well-differentiated area was observed separately in different tissue specimens, and no islands of well-differentiated hyaline cartilage were identified within the undifferentiated areas in the same specimen. Molecular assays confirmed the presence of HEY1-NCOA2 fusion. IRF2BP2-CDX1 fusion and IDH1/2 mutations were negative. The final diagnosis of MCS was made based on the presence of HEY1-NCOA2 gene fusion. MCS should be included in the differential diagnosis when radiologic studies show an extra-axial lobulated mass with calcification. Furthermore, molecular demonstration of HEY1-NCOA2 gene fusion may help make a precise diagnosis of MCS, especially in surgical samples lacking the typical histopathological features.
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Affiliation(s)
- Atsuhito Uneda
- Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Okayama, Japan.,Department of Physiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Okayama, Japan
| | - Kazuhiko Kurozumi
- Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Okayama, Japan
| | - Atsushi Fujimura
- Department of Physiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Okayama, Japan
| | - Atsunori Kamiya
- Department of Physiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Okayama, Japan
| | - Takanori Hirose
- Department of Diagnostic Pathology, Hyogo Cancer Center, Akashi, Hyogo, Japan
| | - Hiroyuki Yanai
- Department of Pathology, Okayama University Hospital, Okayama, Okayama, Japan
| | - Isao Date
- Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Okayama, Japan
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14
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Yamamoto T, Fujimura A, Fan-Yan W, Kai K, Takezaki T, Ohta K, Kuroda JI, Shinojima N, Tomizawa K, Mukasa A. BOT-02 2-METHYLTHIO MODIFICATION OF N6-ISOPENTENYLADENOSINE IN MITOCHONDRIAL TRNAS BY CDK5RAP1 PROMOTES THE MAINTENANCE OF GLIOMA-INITIATING CELLS. Neurooncol Adv 2019. [PMCID: PMC7213080 DOI: 10.1093/noajnl/vdz039.054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
2-Methylthio-N6-isopentenyl modification of adenosine (ms2i6A) is an evolutionally conserved modification that is found in mitochondrial (mt)-tRNAs. Cdk5 regulatory subunit-associated protein 1 (CDK5RAP1) specifically converts N6-isopentenyladenosine (i6A) to ms2i6A at position A37 of four mt-DNA-encoded tRNAs, and the modification regulates efficient mitochondrial translation and energy metabolism in mammals. Here, we report that the ms2 conversion mediated by CDK5RAP1 in mt-tRNAs is required to sustain glioma-initiating cell (GIC)-related traits. CDK5RAP1 maintained the self-renewal capacity, undifferentiated state, and tumorigenic potential of GICs. This regulation was not related to the translational control of mt-proteins. CDK5RAP1 abrogated the antitumor effect of i6A by converting i6A to ms2i6A and protected GICs from excessive autophagy triggered by i6A. The elevated activity of CDK5RAP1 contributed to the amelioration of the cytotoxic effect of i6A and promoted GIC maintenance. The hypoxic microenvironment in the tumor core activated CDK5RAP1, whose activity was inversely correlated with the oxygen concentration because of two [4Fe-4S] clusters in the enzyme. This work demonstrates that CDK5RAP1 is crucial for the detoxification of endogenous i6A and that GICs readily utilize this mechanism for survival.
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Affiliation(s)
- Takahiro Yamamoto
- Department of Neurosurgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Atsushi Fujimura
- Department of Neurosurgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Wei Fan-Yan
- Department of Neurosurgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Keitarou Kai
- Department of Neurosurgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Tatsuya Takezaki
- Department of Neurosurgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Kazutaka Ohta
- Department of Neurosurgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Jun-Ichirou Kuroda
- Department of Neurosurgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Naoki Shinojima
- Department of Neurosurgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Kazuhito Tomizawa
- Department of Neurosurgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Akitake Mukasa
- Department of Neurosurgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
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15
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Matsumoto Y, Ichikawa T, Kurozumi K, Otani Y, Fujimura A, Fujii K, Shimazu Y, Tomita Y, Hattori Y, Uneda A, Tsuboi N, Kaneda K, Makino K, Date I. ANGI-08. AN ANNEXIN A2-REGULATED PHENOTYPIC SHIFT IN GLIOMA. Neuro Oncol 2019. [DOI: 10.1093/neuonc/noz175.119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
BACKGROUND
Malignant glioma has a poor prognosis and is characterized by excessive proliferation, invasion, and angiogenesis. Previously, we established subclones of glioma cell lines with different invasive phenotypes to investigate the mechanisms of invasion in this malignancy. That study revealed annexin A2 (ANXA2) as an activator of angiogenesis and perivascular invasion. Here, we investigated the molecular mechanism of the phenotypic shift in glioma that is induced by ANXA2.
METHODS
We identified ANXA2 target genes using microarray analyses of our four established cell lines and RNA-seq data from the IVY Glioblastoma Atlas Project. Co-expression was then confirmed in human glioma cells. Additionally, qRT-PCR, immunoblotting, invasion assays, proliferation assays, and tube formation assays were performed to uncover the specific roles of these angiogenic invasion-related genes. Furthermore, we examined survival times and phenotypic shifts in vivo.
RESULTS
We identified oncostatin M receptor (OSMR) as an ANXA2-target gene using microarray and RNA-seq, and confirmed its expression correlated with ANXA2 in glioma cells. ANXA2-overexpressing glioma cells showed enhanced OSMR expression and STAT3 phosphorylation, while STAT3 knockdown reduced OSMR expression. When ANXA2 was overexpressed in glioma cells, invasion, angiogenesis, proliferation, and epithelial-mesenchymal transition were promoted; however, silencing OSMR attenuated the ANXA2-induced phenotypic shift. In vivo, ANXA2-overexpressing glioma cells shortened the survival time of tumor-bearing mice, whereas OSMR knockdown increased survival times.
CONCLUSIONS
We analyzed genes whose expression was regulated by ANXA2 in glioma using invasive glioma models. Through this analysis, we identified that ANXA2 and OSMR regulate a phenotypic shift, suggesting that OSMR could be a promising target to treat and prevent glioma invasion.
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Affiliation(s)
- Yuji Matsumoto
- Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Tomotsugu Ichikawa
- Department of Neurosurgery, Kagawa Prefectural Central Hospital, Kagawa, Japan
| | - Kazuhiko Kurozumi
- Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Yoshihiro Otani
- Department of Neurosurgery, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Atsushi Fujimura
- Department of Physiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Kentaro Fujii
- Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Yosuke Shimazu
- Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Yusuke Tomita
- Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Yasuhiko Hattori
- Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Atsuhito Uneda
- Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Nobushige Tsuboi
- Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Keisuke Kaneda
- Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Keigo Makino
- Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Isao Date
- Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
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Yamamoto T, Fujimura A, Wei FY, Shinojima N, Kuroda JI, Mukasa A, Tomizawa K. 2-Methylthio Conversion of N6-Isopentenyladenosine in Mitochondrial tRNAs by CDK5RAP1 Promotes the Maintenance of Glioma-Initiating Cells. iScience 2019; 21:42-56. [PMID: 31654853 PMCID: PMC6820277 DOI: 10.1016/j.isci.2019.10.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 06/04/2019] [Accepted: 10/02/2019] [Indexed: 12/26/2022] Open
Abstract
2-Methylthio-N6-isopentenyl modification of adenosine (ms2i6A) is an evolutionally conserved modification found in mitochondrial (mt)-tRNAs. Cdk5 regulatory subunit-associated protein 1 (CDK5RAP1) specifically converts N6-isopentenyladenosine (i6A) to ms2i6A at position A37 of four mt-DNA-encoded tRNAs, and the modification regulates efficient mitochondrial translation and energy metabolism in mammals. Here, we report that the ms2 conversion mediated by CDK5RAP1 in mt-tRNAs is required to sustain glioma-initiating cell (GIC)-related traits. CDK5RAP1 maintained the self-renewal capacity, undifferentiated state, and tumorigenic potential of GICs. This regulation was not related to the translational control of mt-proteins. CDK5RAP1 abrogated the antitumor effect of i6A by converting i6A to ms2i6A and protected GICs from excessive autophagy triggered by i6A. The elevated activity of CDK5RAP1 contributed to the amelioration of the tumor-suppressive effect of i6A and promoted GIC maintenance. This work demonstrates that CDK5RAP1 is crucial for the detoxification of endogenous i6A and that GICs readily utilize this mechanism for survival. CDK5RAP1 is required to sustain the growth of GICs through ms2 modification of i6A Deficit of CDK5RAP1 inhibits the growth of GIC through i6A accumulation CDK5RAP1 detoxifies i6A by conversion into ms2i6A in the mitochondria of GICs Mitochondria serve as antidotal machinery against i6A in GICs
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Affiliation(s)
- Takahiro Yamamoto
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan; Department of Neurosurgery, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Atsushi Fujimura
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan; Department of Physiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan; Neutron Therapy Research Center, Okayama University, Okayama 700-8558, Japan
| | - Fan-Yan Wei
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Naoki Shinojima
- Department of Neurosurgery, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Jun-Ichiro Kuroda
- Department of Neurosurgery, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Akitake Mukasa
- Department of Neurosurgery, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Kazuhito Tomizawa
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan; Center for Metabolic Regulation of Healthy Aging, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan; Neutron Therapy Research Center, Okayama University, Okayama 700-8558, Japan.
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17
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Fakruddin M, Wei FY, Suzuki T, Asano K, Kaieda T, Omori A, Izumi R, Fujimura A, Kaitsuka T, Miyata K, Araki K, Oike Y, Scorrano L, Suzuki T, Tomizawa K. Defective Mitochondrial tRNA Taurine Modification Activates Global Proteostress and Leads to Mitochondrial Disease. Cell Rep 2019; 22:482-496. [PMID: 29320742 DOI: 10.1016/j.celrep.2017.12.051] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 10/30/2017] [Accepted: 12/14/2017] [Indexed: 12/14/2022] Open
Abstract
A subset of mitochondrial tRNAs (mt-tRNAs) contains taurine-derived modifications at 34U of the anticodon. Loss of taurine modification has been linked to the development of mitochondrial diseases, but the molecular mechanism is still unclear. Here, we showed that taurine modification is catalyzed by mitochondrial optimization 1 (Mto1) in mammals. Mto1 deficiency severely impaired mitochondrial translation and respiratory activity. Moreover, Mto1-deficient cells exhibited abnormal mitochondrial morphology owing to aberrant trafficking of nuclear DNA-encoded mitochondrial proteins, including Opa1. The mistargeted proteins were aggregated and misfolded in the cytoplasm, which induced cytotoxic unfolded protein response. Importantly, application of chemical chaperones successfully suppressed cytotoxicity by reducing protein misfolding and increasing functional mitochondrial proteins in Mto1-deficient cells and mice. Thus, our results demonstrate the essential role of taurine modification in mitochondrial translation and reveal an intrinsic protein homeostasis network between the mitochondria and cytosol, which has therapeutic potential for mitochondrial diseases.
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Affiliation(s)
- Md Fakruddin
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Fan-Yan Wei
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan; Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Kawaguchi, Japan
| | - Takeo Suzuki
- Department of Chemistry and Biotechnology, School of Engineering, University of Tokyo, Tokyo 113-8656, Japan
| | - Kana Asano
- Department of Chemistry and Biotechnology, School of Engineering, University of Tokyo, Tokyo 113-8656, Japan
| | - Takashi Kaieda
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Akiko Omori
- Department of Biology, University of Padova, Padova 35121, Italy
| | - Ryoma Izumi
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Atsushi Fujimura
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Taku Kaitsuka
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Keishi Miyata
- Department of Molecular Genetics, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Kimi Araki
- Institute of Resource Development and Analysis, Kumamoto University, Kumamoto 860-8556, Japan
| | - Yuichi Oike
- Department of Molecular Genetics, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Luca Scorrano
- Department of Biology, University of Padova, Padova 35121, Italy
| | - Tsutomu Suzuki
- Department of Chemistry and Biotechnology, School of Engineering, University of Tokyo, Tokyo 113-8656, Japan
| | - Kazuhito Tomizawa
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan.
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Michiue H, Fukunaga A, Fujimura A, Igawa K, Matsui H, Furuya S. DDIS-20. NEW A6K BORON DRUG DELIVERY SYSTEM FOR CLINICAL APPLICATION OF BORON NEUTRON CAPTURE THERAPY (BNCT). Neuro Oncol 2018. [DOI: 10.1093/neuonc/noy148.299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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19
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Michiue H, Hayashi K, Fujimura A, Matsushita H, Nishiki TI, Matsui H. DDIS-22. ANTI-DEPRESSANT, SSRI IDENTIFIED BY DRUG REPOSITIONING SYSTEM, BLOCKED GLIOBLASTOMA INVASION WITH TARGETING TO INHIBIT ACTIN POLYMERIZATION. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox168.257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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20
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Hatakeyama S, Ando Y, Miura H, Satoh K, Fujimura A. Lymphatic Architecture of Suncus Murinus (House Musk Shrew) Palatum. Lymphology 2017; 50:95-108. [PMID: 30234246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The architecture of craniocervical lymphatic vessels in rodents has been examined previously. In the present study, we evaluated the distribution of collecting lymphatic vessels in the palate of Suncus, which is known to retain the prototype of placental mammals and is more similar to humans in terms of jaw bone morphology when compared with rodents. Three-dimensional reconstructed images of the Suncus palatum revealed that the collecting lymphatic vessels were connected to each other via smaller branches, and ran in an antero-posterior direction in the periosteum. The vessels entered the pair of posterior palatine foramina located near the fourth premolar or the first molar bilaterally, coursed through the posterior palatine canals, and reached the pterygopalatine fossa positioned posteriorly in the palate. The collecting lymphatic vessels changed directions from medial to superior to lateral while wrapping around arteries during their course, perhaps to enable the smooth transition from the palate to the deep cervical node. Inefficient lymphatic flow in humans is attributed to the superior location of the pterygopalatine fossa in the palate when compared with its location in the Suncus.
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Affiliation(s)
- S Hatakeyama
- Department of Oral Health Enhancement, Division of Orthodontics, School of Dentistry, Iwate Medical University, Japan
| | - Y Ando
- Department of Anatomy, Division of Functional Morphology, Iwate Medical University, Japan
| | - H Miura
- Department of General Dentistry, Division of General Dentistry Education, School of Dentistry, Iwate Medical University, Japan
| | - K Satoh
- Department of Oral Health Enhancement, Division of Orthodontics, School of Dentistry, Iwate Medical University, Japan
| | - A Fujimura
- Department of Anatomy, Division of Functional Morphology, Iwate Medical University, Japan
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21
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Jamiruddin MR, Kaitsuka T, Hakim F, Fujimura A, Wei FY, Saitoh H, Tomizawa K. HDAC9 regulates the alternative lengthening of telomere (ALT) pathway via the formation of ALT-associated PML bodies. Biochem Biophys Res Commun 2016; 481:25-30. [PMID: 27833022 DOI: 10.1016/j.bbrc.2016.11.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 11/06/2016] [Indexed: 12/16/2022]
Abstract
Cancer cells overcome cellular senescence by activating the telomere maintenance mechanism, which can be either through telomerase or the alternative lengthening of telomeres (ALT). Being exclusive to cancer cells, targeting ALT is a more promising route for the development of drugs against cancer. The histone deacetylase (HDAC) family plays significant roles in various cellular processes. In addition to the regulation of gene expression, HDACs are also known to directly interact with many proteins. We focused on this family, and found that HDAC9 was up-regulated in ALT-positive cells. In ALT-positive cells treated with HDAC9 siRNA, there was a decrease in the telomere replicative capacity, which was evident from the C-circles assay. Furthermore, the formation of ALT-associated promyelocytic leukemia (PML) nuclear bodies (APBs) was inhibited by HDAC9 knockdown. Based on this study, it is suggested that HDAC9 regulates the formation of APBs and could be a candidate for the target of ALT-cancer therapy.
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Affiliation(s)
- Mohd Raeed Jamiruddin
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Taku Kaitsuka
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Farzana Hakim
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Atsushi Fujimura
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Fan-Yan Wei
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Hisato Saitoh
- Department of Biological Sciences, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, Japan
| | - Kazuhito Tomizawa
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan.
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22
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Wu Y, Wei FY, Kawarada L, Suzuki T, Araki K, Komohara Y, Fujimura A, Kaitsuka T, Takeya M, Oike Y, Suzuki T, Tomizawa K. Mtu1-Mediated Thiouridine Formation of Mitochondrial tRNAs Is Required for Mitochondrial Translation and Is Involved in Reversible Infantile Liver Injury. PLoS Genet 2016; 12:e1006355. [PMID: 27689697 PMCID: PMC5045200 DOI: 10.1371/journal.pgen.1006355] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Accepted: 09/08/2016] [Indexed: 12/26/2022] Open
Abstract
Reversible infantile liver failure (RILF) is a unique heritable liver disease characterized by acute liver failure followed by spontaneous recovery at an early stage of life. Genetic mutations in MTU1 have been identified in RILF patients. MTU1 is a mitochondrial enzyme that catalyzes the 2-thiolation of 5-taurinomethyl-2-thiouridine (τm5s2U) found in the anticodon of a subset of mitochondrial tRNAs (mt-tRNAs). Although the genetic basis of RILF is clear, the molecular mechanism that drives the pathogenesis remains elusive. We here generated liver-specific knockout of Mtu1 (Mtu1LKO) mice, which exhibited symptoms of liver injury characterized by hepatic inflammation and elevated levels of plasma lactate and AST. Mechanistically, Mtu1 deficiency resulted in a loss of 2-thiolation in mt-tRNAs, which led to a marked impairment of mitochondrial translation. Consequently, Mtu1LKO mice exhibited severe disruption of mitochondrial membrane integrity and a broad decrease in respiratory complex activities in the hepatocytes. Interestingly, mitochondrial dysfunction induced signaling pathways related to mitochondrial proliferation and the suppression of oxidative stress. The present study demonstrates that Mtu1-dependent 2-thiolation of mt-tRNA is indispensable for mitochondrial translation and that Mtu1 deficiency is a primary cause of RILF. In addition, Mtu1 deficiency is associated with multiple cytoprotective pathways that might prevent catastrophic liver failure and assist in the recovery from liver injury. Mitochondrial transfer tRNA (mt-tRNA) contains a variety of chemical modifications that are introduced post-transcriptionally. Three mt-tRNAs for Lys, Gln and Glu contain 5-taurinomethyl-2-thiouridine (τm5s2U) in their anticodons. It is known that the loss of 2-thiolation of τm5s2U is strongly associated with the development of reversible infantile liver failure (RILF) because pathogenic mutations of RILF were found in the MTU1 gene, which encodes an enzyme responsible for the 2-thiolation of τm5s2U. However, the molecular mechanism underlying RILF pathogenesis associated with a lack of MTU1 remains elusive. To understand the physiological function of MTU1 and its association with liver failure, we generated liver-specific Mtu1-deficient (Mtu1LKO) mice. Mtu1 deficiency abolished 2-thiouridine formation in the three mt-tRNAs. Loss of the 2-thiouridine modification resulted in a marked impairment of mitochondrial translation and abnormal mitochondrial structure. Consequently, the Mtu1LKO mice exhibited liver injury, which resembles the symptoms of RILF patients. Furthermore, mitochondrial dysfunction in Mtu1LKO mice induced mitochondrial biogenesis and suppressed oxidative stress. These findings elucidate the cellular and physiological functions of Mtu1 and provide a mouse model for understanding RILF pathogenesis.
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Affiliation(s)
- Yong Wu
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Fan-Yan Wei
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
- Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Kawaguchi, Japan
| | - Layla Kawarada
- Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, Tokyo, Japan
| | - Takeo Suzuki
- Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, Tokyo, Japan
| | - Kimi Araki
- Division of Developmental Genetics, Institute of Resource Development and Analysis, Kumamoto University, Kumamoto, Japan
| | - Yoshihiro Komohara
- Department of Cell Pathology, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Atsushi Fujimura
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Taku Kaitsuka
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Motohiro Takeya
- Department of Cell Pathology, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Yuichi Oike
- Department of Molecular Genetics, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Tsutomu Suzuki
- Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, Tokyo, Japan
| | - Kazuhito Tomizawa
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
- * E-mail:
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23
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Panciera T, Azzolin L, Fujimura A, Di Biagio D, Frasson C, Bresolin S, Soligo S, Basso G, Bicciato S, Rosato A, Cordenonsi M, Piccolo S. Induction of Expandable Tissue-Specific Stem/Progenitor Cells through Transient Expression of YAP/TAZ. Cell Stem Cell 2016; 19:725-737. [PMID: 27641305 PMCID: PMC5145813 DOI: 10.1016/j.stem.2016.08.009] [Citation(s) in RCA: 177] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 07/13/2016] [Accepted: 08/12/2016] [Indexed: 01/21/2023]
Abstract
The ability to induce autologous tissue-specific stem cells in culture could have a variety of applications in regenerative medicine and disease modeling. Here we show that transient expression of exogenous YAP or its closely related paralogue TAZ in primary differentiated mouse cells can induce conversion to a tissue-specific stem/progenitor cell state. Differentiated mammary gland, neuronal, and pancreatic exocrine cells, identified using a combination of cell sorting and lineage tracing approaches, efficiently convert to proliferating cells with properties of stem/progenitor cells of their respective tissues after YAP induction. YAP-induced mammary stem/progenitor cells show molecular and functional properties similar to endogenous MaSCs, including organoid formation and mammary gland reconstitution after transplantation. Because YAP/TAZ function is also important for self-renewal of endogenous stem cells in culture, our findings have implications for understanding the molecular determinants of the somatic stem cell state. YAP/TAZ expression turns differentiated mammary gland cells into mammary stem cells YAP-induced MaSCs form organoids and have reconstitution capacity Induction of YAP in differentiated fetal neurons yields tripotent neural stem cells Pancreatic exocrine cells are also converted to progenitors by YAP expression
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Affiliation(s)
- Tito Panciera
- Department of Molecular Medicine, University of Padua School of Medicine, viale Colombo 3, 35126 Padua, Italy
| | - Luca Azzolin
- Department of Molecular Medicine, University of Padua School of Medicine, viale Colombo 3, 35126 Padua, Italy
| | - Atsushi Fujimura
- Department of Molecular Medicine, University of Padua School of Medicine, viale Colombo 3, 35126 Padua, Italy
| | - Daniele Di Biagio
- Department of Molecular Medicine, University of Padua School of Medicine, viale Colombo 3, 35126 Padua, Italy
| | - Chiara Frasson
- Department of Woman and Child Health, Haemato-Oncology Laboratory, University of Padua, via Giustiniani 3, 35128 Padua, Italy
| | - Silvia Bresolin
- Department of Woman and Child Health, Haemato-Oncology Laboratory, University of Padua, via Giustiniani 3, 35128 Padua, Italy
| | - Sandra Soligo
- Department of Molecular Medicine, University of Padua School of Medicine, viale Colombo 3, 35126 Padua, Italy
| | - Giuseppe Basso
- Department of Woman and Child Health, Haemato-Oncology Laboratory, University of Padua, via Giustiniani 3, 35128 Padua, Italy
| | - Silvio Bicciato
- Center for Genome Research, Department of Life Sciences, University of Modena and Reggio Emilia, via G. Campi 287, 41100 Modena, Italy
| | - Antonio Rosato
- Istituto Oncologico Veneto IOV-IRCCS and Department of Surgery, Oncology, and Gastroenterology, University of Padua School of Medicine, via Gattamelata 64, 35128 Padua, Italy
| | - Michelangelo Cordenonsi
- Department of Molecular Medicine, University of Padua School of Medicine, viale Colombo 3, 35126 Padua, Italy
| | - Stefano Piccolo
- Department of Molecular Medicine, University of Padua School of Medicine, viale Colombo 3, 35126 Padua, Italy.
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24
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Takahashi N, Wei FY, Watanabe S, Hirayama M, Ohuchi Y, Fujimura A, Kaitsuka T, Ishii I, Sawa T, Nakayama H, Akaike T, Tomizawa K. Reactive sulfur species regulate tRNA methylthiolation and contribute to insulin secretion. Nucleic Acids Res 2016; 45:435-445. [PMID: 27568003 PMCID: PMC5224495 DOI: 10.1093/nar/gkw745] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 08/16/2016] [Indexed: 12/22/2022] Open
Abstract
The 2-methylthio (ms2) modification at A37 of tRNAs is critical for accurate decoding, and contributes to metabolic homeostasis in mammals. However, the regulatory mechanism of ms2 modification remains largely unknown. Here, we report that cysteine hydropersulfide (CysSSH), a newly identified reactive sulfur species, is involved in ms2 modification in cells. The suppression of intracellular CysSSH production rapidly reduced ms2 modification, which was rescued by the application of an exogenous CysSSH donor. Using a unique and stable isotope-labeled CysSSH donor, we show that CysSSH was capable of specifically transferring its reactive sulfur atom to the cysteine residues of ms2-modifying enzymes as well as ms2 modification. Furthermore, the suppression of CysSSH production impaired insulin secretion and caused glucose intolerance in both a pancreatic β-cell line and mouse model. These results demonstrate that intracellular CysSSH is a novel sulfur source for ms2 modification, and that it contributes to insulin secretion.
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Affiliation(s)
- Nozomu Takahashi
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan.,Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Fan-Yan Wei
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan.,Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Kawaguchi, Japan
| | - Sayaka Watanabe
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Mayumi Hirayama
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan.,Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Yuya Ohuchi
- Dojindo Laboratories, 2025-5 Tabaru Kamimashikigun, Mashikimachi, Kumamoto 861-2202, Japan
| | - Atsushi Fujimura
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Taku Kaitsuka
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Isao Ishii
- Department of Health Chemistry, Showa Pharmaceutical University, Tokyo 194-8543, Japan
| | - Tomohiro Sawa
- Department of Microbiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556,Japan
| | - Hideki Nakayama
- Department of Oral and Maxillofacial Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Takaaki Akaike
- Department of Environmental Health Sciences and Molecular Toxicology,Tohoku University Graduate School of Medicine, Sendai 980-8577, Japan
| | - Kazuhito Tomizawa
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
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25
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Shanks AL, Morgan SG, MacMahan J, Reniers AJHM, Kudela R, Jarvis M, Brown J, Fujimura A, Ziccarelli L, Griesemer C. Variation in the abundance of Pseudo-nitzschia and domoic acid with surf zone type. Harmful Algae 2016; 55:172-178. [PMID: 28073530 DOI: 10.1016/j.hal.2016.03.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Revised: 03/07/2016] [Accepted: 03/07/2016] [Indexed: 06/06/2023]
Abstract
Most harmful algal blooms (HAB) originate away from the shore and, for them to endanger human health, they must be first transported to shore after which they must enter the surf zone where they can be feed upon by filter feeders. The last step in this sequence, entrance into the surf zone, depends on surf zone hydrodynamics. During two 30-day periods, we sampled Pseudo-nitzschia and particulate domoic acid (pDA) in and offshore of a more dissipative surf zone at Sand City, California (2010) and sampled Pseudo-nitzschia in and out of reflective surf zones at a beach and rocky shores at Carmel River State Beach, California (2011). At Sand City, we measured domoic acid in sand crabs, Emerita analoga. In the more dissipative surf zone, concentrations of Pseudo-nitzschia and pDA were an order of magnitude higher in samples from a rip current than in samples collected just seaward of the surf zone and were 1000 times more abundant than in samples from the shoals separating rip currents. Domoic acid was present in all the Emerita samples and varied directly with the concentration of pDA and Pseudo-nitzschia in the rip current. In the more reflective surf zones, Pseudo-nitzschia concentrations were 1-2 orders of magnitude lower than in samples from 125 and 20m from shore. Surf zone hydrodynamics affects the ingress of Pseudo-nitzschia into surf zones and the exposure of intertidal organisms to HABs on the inner shelf.
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Affiliation(s)
- Alan L Shanks
- University of Oregon, Oregon Institute of Marine Biology, PO Box 5389, Charleston, OR 97420, USA.
| | - Steven G Morgan
- Bodega Marine Laboratory, University of California Davis, 2099 Westside Dr., Bodega Bay, CA 94923-0247, USA
| | - Jamie MacMahan
- Department of Oceanography, Graduate School of Engineering and Applied Sciences, Monterey, CA 93943, USA
| | - Ad J H M Reniers
- Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149, USA; Delft University of Technology, Environmental Fluid Mechanics, Stevinweg 1, 2628 CN Delft, The Netherlands
| | - Raphael Kudela
- Ocean Sciences & Institute for Marine Sciences, University of California Santa Cruz, 1156 High Street, Santa Cruz, CA 95064, USA
| | - Marley Jarvis
- University of Oregon, Oregon Institute of Marine Biology, PO Box 5389, Charleston, OR 97420, USA
| | - Jenna Brown
- Department of Oceanography, Graduate School of Engineering and Applied Sciences, Monterey, CA 93943, USA
| | - Atsushi Fujimura
- Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149, USA
| | - Lisa Ziccarelli
- University of Oregon, Oregon Institute of Marine Biology, PO Box 5389, Charleston, OR 97420, USA; Ocean Sciences & Institute for Marine Sciences, University of California Santa Cruz, 1156 High Street, Santa Cruz, CA 95064, USA
| | - Chris Griesemer
- Bodega Marine Laboratory, University of California Davis, 2099 Westside Dr., Bodega Bay, CA 94923-0247, USA
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26
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Michiue H, Fujimura A, Mastushita H, Nishiki TI, Matsui H. CBIO-25NEW HYPOXIA-INDUCED INVASION FACTOR IN HUMAN GLIOBLASTOMA INVASION. Neuro Oncol 2015. [DOI: 10.1093/neuonc/nov209.25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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27
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Wei FY, Zhou B, Suzuki T, Miyata K, Ujihara Y, Horiguchi H, Takahashi N, Xie P, Michiue H, Fujimura A, Kaitsuka T, Matsui H, Koga Y, Mohri S, Suzuki T, Oike Y, Tomizawa K. Cdk5rap1-mediated 2-methylthio modification of mitochondrial tRNAs governs protein translation and contributes to myopathy in mice and humans. Cell Metab 2015; 21:428-42. [PMID: 25738458 DOI: 10.1016/j.cmet.2015.01.019] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Revised: 11/24/2014] [Accepted: 01/26/2015] [Indexed: 12/20/2022]
Abstract
Transfer RNAs (tRNAs) contain a wide variety of posttranscriptional modifications that are important for accurate decoding. Mammalian mitochondrial tRNAs (mt-tRNAs) are modified by nuclear-encoded tRNA-modifying enzymes; however, the physiological roles of these modifications remain largely unknown. In this study, we report that Cdk5 regulatory subunit-associated protein 1 (Cdk5rap1) is responsible for 2-methylthio (ms(2)) modifications of mammalian mt-tRNAs for Ser(UCN), Phe, Tyr, and Trp codons. Deficiency in ms(2) modification markedly impaired mitochondrial protein synthesis, which resulted in respiratory defects in Cdk5rap1 knockout (KO) mice. The KO mice were highly susceptive to stress-induced mitochondrial remodeling and exhibited accelerated myopathy and cardiac dysfunction under stressed conditions. Furthermore, we demonstrate that the ms(2) modifications of mt-tRNAs were sensitive to oxidative stress and were reduced in patients with mitochondrial disease. These findings highlight the fundamental role of ms(2) modifications of mt-tRNAs in mitochondrial protein synthesis and their pathological consequences in mitochondrial disease.
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Affiliation(s)
- Fan-Yan Wei
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Bo Zhou
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Takeo Suzuki
- Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
| | - Keishi Miyata
- Department of Molecular Genetics, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Yoshihiro Ujihara
- First Department of Physiology, Kawasaki Medical School, Okayama 701-0192, Japan
| | - Haruki Horiguchi
- Department of Molecular Genetics, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Nozomu Takahashi
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Peiyu Xie
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Hiroyuki Michiue
- Department of Physiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Atsushi Fujimura
- Department of Physiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Taku Kaitsuka
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Hideki Matsui
- Department of Physiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Yasutoshi Koga
- Department of Pediatrics and Child Health, Kurume University Graduate School of Medicine, Fukuoka 830-0011, Japan
| | - Satoshi Mohri
- First Department of Physiology, Kawasaki Medical School, Okayama 701-0192, Japan
| | - Tsutomu Suzuki
- Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
| | - Yuichi Oike
- Department of Molecular Genetics, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Kazuhito Tomizawa
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan.
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28
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Zhou B, Wei FY, Kanai N, Fujimura A, Kaitsuka T, Tomizawa K. Identification of a splicing variant that regulates type 2 diabetes risk factor CDKAL1 level by a coding-independent mechanism in human. Hum Mol Genet 2014; 23:4639-50. [PMID: 24760768 DOI: 10.1093/hmg/ddu184] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Single-nucleotide polymorphisms (SNPs) in CDKAL1 have been associated with the development of type 2 diabetes (T2D). CDKAL1 catalyzes 2-methylthio modification of adenosine at position 37 of tRNA(Lys)(UUU). A deficit of this modification causes aberrant protein synthesis, and is associated with impairment of insulin secretion in both mouse model and human. However, it is unknown whether the T2D-associated SNPs in CDKAL1 are associated with downregulation of CDKAL1 by regulating the gene expression. Here, we report a specific splicing variant of CDKAL1 termed CDKAL1-v1 that is markedly lower in individuals carrying risk SNPs of CDKAL1. Interestingly, CDKAL1-v1 is a non-coding transcript, which regulates the CDKAL1 level by competitive binding to a CDKAL1-targeting miRNA. By direct editing of the genome, we further show that the nucleotides around the SNP regions are critical for the alternative splicing of CDKAL1-v1. These findings reveal that the T2D-associated SNPs in CDKAL1 reduce CDKAL1-v1 levels by impairing splicing, which in turn increases miRNA-mediated suppression of CDKAL1. Our results suggest that CDKAL1-v1-mediated suppression of CDKAL1 might underlie the pathogenesis of T2D in individuals carrying the risk SNPs.
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Affiliation(s)
- Bo Zhou
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Fan-Yan Wei
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Narumi Kanai
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Atsushi Fujimura
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Taku Kaitsuka
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
| | - Kazuhito Tomizawa
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan
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29
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Ioka Y, Ushijima K, Ioka T, Noguchi T, Imbu Y, Kusama M, Fujimura A. PP015—Chronotherapy with docetaxel, cisplatin, and 5-fluorouracil (5-FU) in patients with oral squamous cell carcinoma. Clin Ther 2013. [DOI: 10.1016/j.clinthera.2013.07.052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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30
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Tanaka T, Fujimura A, Ichimura K, Yanai H, Sato Y, Takata K, Okada H, Kawano S, Tanabe S, Yoshino T. Clinicopathological characteristics of human epidermal growth factor receptor 2-positive Barrett's adenocarcinoma. World J Gastroenterol 2012; 18:6263-6268. [PMID: 23180947 PMCID: PMC3501775 DOI: 10.3748/wjg.v18.i43.6263] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To compare the clinicopathological characteristics of human epidermal growth factor receptor 2 (HER2)-positive and HER2-negative Barrett’s adenocarcinoma in Japan.
METHODS: We performed immunohistochemical analysis of HER2 in 30 samples taken from patients with Barrett’s adenocarcinoma and dual color in situ hybridization in cases showing 2+ reactions. We compared the clinicopathological characteristics of HER2-positive and HER2-negative patients.
RESULTS: HER2 positivity was identified in 8 (27%) carcinoma samples. We found that HER2 expression was associated with p53 overexpression (100% vs 52.6% in pT1 tumor; 100% vs 54.5% in all stage tumor, P < 0.05) and protruding lesions at the early disease stage. There was no association between the mucin phenotype of the carcinomas and prognosis. HER2 expression and low clinical stage were unexpectedly different between Barrett’s adenocarcinoma patients and gastric cancer patients, but the macroscopic features may be associated with earlier diagnosis in these patients.
CONCLUSION: Our results suggest that HER2-positive Barrett’s adenocarcinomas are associated with p53 overexpression and lesion protrusion at the early disease stage.
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31
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Ando Y, Murai O, Kuwajima Y, Furukawa S, Sasaki D, Okawa Y, Yaegashi T, Miura H, Fujimura A. Lymphatic architecture of the human gingival interdental papilla. Lymphology 2011; 44:146-154. [PMID: 22458116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Many studies have investigated the lymphatic architecture of head and neck using experimental animals, confirming the existence of lymphatic networks beneath the epithelium in gingival tissue. In this study, we investigated the use of these lymphatics as a drug delivery route by studying the architecture of lymphatic vessels in human interdental papilla. Serial cryosections were cut using the film-transfer method. To identify lymphatics, the sections were stained using enzyme histochemical and immunohistochemical techniques and three-dimensional images of lymphatics were reconstructed using 3D visualization software. Capillary lymphatic networks were observed in the lamina propria beneath the epithelium in human interdental papilla, and they joined with lymphatic networks beneath the epithelium in free gingiva. The networks consisted of a single layer of large irregular, hexagonal meshes and precollecting lymphatic vessels heading toward collecting lymphatic vessels that exited on the periosteum of the alveolar crest. These findings suggest that lymphatic flow from the interdental papilla drains into collecting lymphatic vessels running buccolingually on the alveolar crest of the interdental papilla. This may be an important anatomical feature during inflammation throughout the oral cavity in that the drainage function is maintained by part of lymphatic flow that is not impaired during the healing process.
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Affiliation(s)
- Y Ando
- Department of Anatomy, Division of Functional Morphology, Iwate Medical University, Iwate, Japan
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32
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Noguchi T, Nakamura T, Kimura M, Zolensky ME, Tanaka M, Hashimoto T, Konno M, Nakato A, Ogami T, Fujimura A, Abe M, Yada T, Mukai T, Ueno M, Okada T, Shirai K, Ishibashi Y, Okazaki R. Incipient Space Weathering Observed on the Surface of Itokawa Dust Particles. Science 2011; 333:1121-5. [DOI: 10.1126/science.1207794] [Citation(s) in RCA: 213] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- T. Noguchi
- College of Science, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan
| | - T. Nakamura
- Department of Earth Science, Graduate School of Science, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - M. Kimura
- College of Science, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan
| | - M. E. Zolensky
- Astromaterials Research and Exploration Science Directorate, NASA, Johnson Space Center, 2101 NASA Parkway, Houston, TX 77058, USA
| | - M. Tanaka
- Synchrotron X-ray Station at SPring-8, National Institute for Materials Science, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan
| | - T. Hashimoto
- Hitachi High-Technologies, 882 Ichige, Hitachinaka, Ibaraki 312-8504 Japan
| | - M. Konno
- Hitachi High-Technologies, 882 Ichige, Hitachinaka, Ibaraki 312-8504 Japan
| | - A. Nakato
- Department of Earth Science, Graduate School of Science, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - T. Ogami
- Department of Earth Science, Graduate School of Science, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - A. Fujimura
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
| | - M. Abe
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
| | - T. Yada
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
| | - T. Mukai
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
| | - M. Ueno
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
| | - T. Okada
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
| | - K. Shirai
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
| | - Y. Ishibashi
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
| | - R. Okazaki
- Department of Earth and Planetary Science, Kyushu University, Hakozaki, Fukuoka 812-8581, Japan
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Ebihara M, Sekimoto S, Shirai N, Hamajima Y, Yamamoto M, Kumagai K, Oura Y, Ireland TR, Kitajima F, Nagao K, Nakamura T, Naraoka H, Noguchi T, Okazaki R, Tsuchiyama A, Uesugi M, Yurimoto H, Zolensky ME, Abe M, Fujimura A, Mukai T, Yada Y. Neutron Activation Analysis of a Particle Returned from Asteroid Itokawa. Science 2011; 333:1119-21. [DOI: 10.1126/science.1207865] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Tsuchiyama A, Uesugi M, Matsushima T, Michikami T, Kadono T, Nakamura T, Uesugi K, Nakano T, Sandford SA, Noguchi R, Matsumoto T, Matsuno J, Nagano T, Imai Y, Takeuchi A, Suzuki Y, Ogami T, Katagiri J, Ebihara M, Ireland TR, Kitajima F, Nagao K, Naraoka H, Noguchi T, Okazaki R, Yurimoto H, Zolensky ME, Mukai T, Abe M, Yada T, Fujimura A, Yoshikawa M, Kawaguchi J. Three-Dimensional Structure of Hayabusa Samples: Origin and Evolution of Itokawa Regolith. Science 2011; 333:1125-8. [DOI: 10.1126/science.1207807] [Citation(s) in RCA: 207] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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35
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Wei FY, Suzuki T, Watanabe S, Kimura S, Kaitsuka T, Fujimura A, Matsui H, Atta M, Michiue H, Fontecave M, Yamagata K, Suzuki T, Tomizawa K. Deficit of tRNA(Lys) modification by Cdkal1 causes the development of type 2 diabetes in mice. J Clin Invest 2011; 121:3598-608. [PMID: 21841312 DOI: 10.1172/jci58056] [Citation(s) in RCA: 193] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2011] [Accepted: 06/08/2011] [Indexed: 12/20/2022] Open
Abstract
The worldwide prevalence of type 2 diabetes (T2D), which is caused by a combination of environmental and genetic factors, is increasing. With regard to genetic factors, variations in the gene encoding Cdk5 regulatory associated protein 1-like 1 (Cdkal1) have been associated with an impaired insulin response and increased risk of T2D across different ethnic populations, but the molecular function of this protein has not been characterized. Here, we show that Cdkal1 is a mammalian methylthiotransferase that biosynthesizes 2-methylthio-N6-threonylcarbamoyladenosine (ms2t6A) in tRNA(Lys)(UUU) and that it is required for the accurate translation of AAA and AAG codons. Mice with pancreatic β cell-specific KO of Cdkal1 (referred to herein as β cell KO mice) showed pancreatic islet hypertrophy, a decrease in insulin secretion, and impaired blood glucose control. In Cdkal1-deficient β cells, misreading of Lys codon in proinsulin occurred, resulting in a reduction of glucose-stimulated proinsulin synthesis. Moreover, expression of ER stress-related genes was upregulated in these cells, and abnormally structured ER was observed. Further, the β cell KO mice were hypersensitive to high fat diet-induced ER stress. These findings suggest that glucose-stimulated translation of proinsulin may require fully modified tRNA(Lys)(UUU), which could potentially explain the molecular pathogenesis of T2D in patients carrying cdkal1 risk alleles.
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Affiliation(s)
- Fan-Yan Wei
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
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36
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Han XJ, Tomizawa K, Fujimura A, Ohmori I, Nishiki TI, Matsushita M, Matsui H. Regulation of mitochondrial dynamics and neurodegenerative diseases. Acta Med Okayama 2011; 65:1-10. [PMID: 21339790 DOI: 10.18926/amo/43824] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Mitochondria are important cellular organelles in most metabolic processes and have a highly dynamic nature, undergoing frequent fission and fusion. The dynamic balance between fission and fusion plays critical roles in mitochondrial functions. In recent studies, several large GTPases have been identified as key molecular factors in mitochondrial fission and fusion. Moreover, the posttranslational modifications of these large GTPases, including phosphorylation, ubiquitination and SUMOylation, have been shown to be involved in the regulation of mitochondrial dynamics. Neurons are particularly sensitive and vulnerable to any abnormalities in mitochondrial dynamics, due to their large energy demand and long extended processes. Emerging evidences have thus indicated a strong linkage between mitochondria and neurodegenerative diseases, including Alzheimer's disease, Parkinson's disease and Huntington's disease. In this review, we will describe the regulation of mitochondrial dynamics and its role in neurodegenerative diseases.
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Affiliation(s)
- Xiao-Jian Han
- Department of Physiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
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37
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Fujimura A, Michiue H, Nishiki TI, Ohmori I, Wei FY, Matsui H, Tomizawa K. Expression of a constitutively active calcineurin encoded by an intron-retaining mRNA in follicular keratinocytes. PLoS One 2011; 6:e17685. [PMID: 21423799 PMCID: PMC3056713 DOI: 10.1371/journal.pone.0017685] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2010] [Accepted: 02/07/2011] [Indexed: 11/18/2022] Open
Abstract
Hair growth is a highly regulated cyclical process. Immunosuppressive immunophilin ligands such as cyclosporin A (CsA) and FK506 are known as potent hair growth modulatory agents in rodents and humans that induce active hair growth and inhibit hair follicle regression. The immunosuppressive effectiveness of these drugs has been generally attributed to inhibition of T cell activation through well-characterized pathways. Specifically, CsA and FK506 bind to intracellular proteins, principally cyclophilin A and FKBP12, respectively, and thereby inhibit the phosphatase calcineurin (Cn). The calcineurin (Cn)/NFAT pathway has an important, but poorly understood, role in the regulation of hair follicle development. Here we show that a novel-splicing variant of calcineurin Aß CnAß-FK, which is encoded by an intron-retaining mRNA and is deficient in the autoinhibitory domain, is predominantly expressed in mature follicular keratinocytes but not in the proliferating keratinocytes of rodents. CnAß-FK was weakly sensitive to Ca(2+) and dephosphorylated NFATc2 under low Ca(2+) levels in keratinocytes. Inhibition of Cn/NFAT induced hair growth in nude mice. Cyclin G2 was identified as a novel target of the Cn/NFATc2 pathway and its expression in follicular keratinocytes was reduced by inhibition of Cn/NFAT. Overexpression of cyclin G2 arrested the cell cycle in follicular keratinocytes in vitro and the Cn inhibitor, cyclosporin A, inhibited nuclear localization of NFATc2, resulting in decreased cyclin G2 expression in follicular keratinocytes of rats in vivo. We therefore suggest that the calcineurin/NFAT pathway has a unique regulatory role in hair follicle development.
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Affiliation(s)
- Atsushi Fujimura
- Department of Physiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Hiroyuki Michiue
- Department of Physiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Tei-ichi Nishiki
- Department of Physiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Iori Ohmori
- Department of Physiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Fan-Yan Wei
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Hideki Matsui
- Department of Physiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Kazuhito Tomizawa
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
- PREST, Japan Science Technology Agency (JST), Kawaguchi, Japan
- * E-mail:
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38
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Maeda A, Ando H, Asai T, Ishiguro H, Umemoto N, Ohta M, Morishima M, Sumida A, Kobayashi T, Hosohata K, Ushijima K, Fujimura A. Differential Impacts of CYP2C19 Gene Polymorphisms on the Antiplatelet Effects of Clopidogrel and Ticlopidine. Clin Pharmacol Ther 2010; 89:229-33. [DOI: 10.1038/clpt.2010.268] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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39
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Kumazawa T, Fujimura A, Murayama A, Nishimura K, Kimura K, Yanagisawa J. 649 Regulation of p53 and cell proliferation by the nucleolar factors. EJC Suppl 2010. [DOI: 10.1016/s1359-6349(10)71448-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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40
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Ioka T, Tsuruoka S, Ito C, Iwaguro H, Asahara T, Fujimura A, Kusano E. Hypertension induced by erythropoietin has a correlation with truncated erythropoietin receptor mRNA in endothelial progenitor cells of hemodialysis patients. Clin Pharmacol Ther 2009; 86:154-9. [PMID: 19458615 DOI: 10.1038/clpt.2009.74] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Endothelial nitric oxide (NO) and cyclic guanosine monophosphate (cGMP) contribute to erythropoietin (EPO)-induced hypertension, a major adverse reaction associated with EPO therapy. To investigate the mechanism of EPO-induced hypertension, we examined circulating endothelial progenitor cells (EPCs) taken from 56 hemodialysis (HD) patients. Among these EPCs (which reflect the condition of the endothelium), we looked for EPO receptor (EPOR) mRNAs. A truncated form of EPOR acts as a dominant negative regulator of EPO signaling, leading to hypertension. We found that the ratio of truncated EPOR mRNA in EPCs has a correlation with EPO-induced increase in blood pressure (r = 0.36, P = 0.02). The ratio of truncated to total EPOR mRNA in EPCs had an inverse correlation with EPO-induced cGMP production in vitro (r = -0.31, P = 0.02). A similar correlation was observed in cultured human endothelial cells after transfection of the full-length or truncated forms of EPOR (r = -0.92, P < 0.001). It follows, therefore, that evaluation of EPOR isoform mRNA in EPCs can predict EPO-induced hypertension. The termination of the EPO signal by truncated EPORs may decrease NO/cGMP production after EPO exposure, thereby raising blood pressure.
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Affiliation(s)
- T Ioka
- Department of Nephrology, Jichi Medical University, Tochigi, Japan
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41
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Feng B, Tomizawa K, Michiue H, Miyatake SI, Han XJ, Fujimura A, Seno M, Kirihata M, Matsui H. Delivery of sodium borocaptate to glioma cells using immunoliposome conjugated with anti-EGFR antibodies by ZZ-His. Biomaterials 2009; 30:1746-55. [DOI: 10.1016/j.biomaterials.2008.12.010] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2008] [Accepted: 12/04/2008] [Indexed: 12/01/2022]
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42
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Ando H, Takamura T, Matsuzawa-Nagata N, Shima KR, Eto T, Misu H, Shiramoto M, Tsuru T, Irie S, Fujimura A, Kaneko S. Clock gene expression in peripheral leucocytes of patients with type 2 diabetes. Diabetologia 2009; 52:329-35. [PMID: 18974966 DOI: 10.1007/s00125-008-1194-6] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2008] [Accepted: 10/07/2008] [Indexed: 12/23/2022]
Abstract
AIM/HYPOTHESIS Recent studies have demonstrated relationships between circadian clock function and the development of metabolic diseases such as type 2 diabetes. We investigated whether the peripheral circadian clock is impaired in patients with type 2 diabetes. METHODS Peripheral leucocytes were obtained from eight patients with diabetes and six comparatively young non-diabetic volunteers at 09:00, 15:00, 21:00 and 03:00 hours (study 1) and from 12 male patients with diabetes and 14 age-matched men at 09:00 hours (study 2). Transcript levels of clock genes (CLOCK, BMAL1 [also known as ARNTL], PER1, PER2, PER3 and CRY1) were determined by real-time quantitative PCR. RESULTS In study 1, mRNA expression patterns of BMAL1, PER1, PER2 and PER3 exhibited 24 h rhythmicity in the leucocytes of all 14 individuals. The expression levels of these mRNAs were significantly (p < 0.05) lower in patients with diabetes than in non-diabetic individuals at one or more time points. Moreover, the amplitudes of mRNA expression rhythms of PER1 and PER3 genes tended to diminish in patients with diabetes. In study 2, leucocytes obtained from patients with diabetes expressed significantly (p < 0.05) lower transcript levels of BMAL1, PER1 and PER3 compared with leucocytes from control individuals, and transcript expression was inversely correlated with HbA(1c) levels (rho = -0.47 to -0.55, p < 0.05). CONCLUSIONS/INTERPRETATION These results suggest that rhythmic mRNA expression of clock genes is dampened in peripheral leucocytes of patients with type 2 diabetes. The impairment of the circadian clock appears to be closely associated with the pathophysiology of type 2 diabetes in humans.
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Affiliation(s)
- H Ando
- Division of Clinical Pharmacology, Department of Pharmacology, School of Medicine, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke, Tochigi 329-0498, Japan.
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43
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Araki N, Tsuruoka S, Wang N, Hasegawa G, Yanagihara H, Ando H, Omasa T, Enosawa S, Nagai H, Fujimura A. Human CYP3A4-introduced HepG2 cells:In vitroscreening system of new chemicals for the evaluation of CYP3A4-inhibiting activity. Xenobiotica 2008; 38:1355-64. [DOI: 10.1080/00498250802468645] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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44
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Yamamoto H, Tsuruoka S, Ioka T, Ando H, Ito C, Akimoto T, Fujimura A, Asano Y, Kusano E. Indoxyl sulfate stimulates proliferation of rat vascular smooth muscle cells. Kidney Int 2006; 69:1780-5. [PMID: 16612331 DOI: 10.1038/sj.ki.5000340] [Citation(s) in RCA: 192] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Vascular smooth muscle cell (VSMC) proliferation is a key event in the progression of arteriosclerosis. Clinical studies show that uremic toxins deteriorate the arteriosclerosis in renal failure patients. Indoxyl sulfate (IS) is a strong protein-bound uremic toxin, but the effect of IS on VSMC proliferation has not been studied. We examined the effect of IS on rat VSMC proliferation, assessed by a cell counting kit (4-[3-[4-lodophenyl]-2-4(4-nitrophenyl)-2H-5-tetrazolio-1,3-benzene disulfonate] assay) and by [(3)H]thymidine incorporation in vitro. We further evaluated a contribution of mitogen-activated protein kinase (MAPK; p44/42 MAPK) to VSMC proliferation by IS. Immunohistochemical staining was performed for VSMCs using antirat organic anion transporter (OAT)3 antibody. The mRNA expressions of platelet-derived growth factor (PDGF)-A and -C chains, and PDGF-beta receptor were evaluated by real-time PCR. IS stimulated the proliferation of VSMCs in a concentration-dependent manner and activated p44/42 MAPK. Concentration of IS needed to stimulate the proliferation of rat VSMC was about 250 microM, which is compatible with that in the serum of end-stage renal failure patients. PD98059 (10 microM), a selective inhibitor of MAPK/extracellular signal-regulated kinase, inhibited the IS-induced (250 microM) VSMC proliferation and phosphorylation of MAPK. Probenecid (0.5 mM), an inhibitor and substrate of OAT, inhibited the IS-induced (250 microM) VSMC proliferation. Rat OAT3 was detected in VSMCs. The mRNA expressions of PDGF-C chain and PDGF-beta receptor were significantly increased by IS. We conclude that IS directly stimulates rat VSMC proliferation and activates MAPK in vitro. This might be one of the mechanisms underlying the progression of atherosclerotic lesions in end-stage renal disease patients.
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Affiliation(s)
- H Yamamoto
- Department of Nephrology, Jichi Medical School, Tochigi, Japan
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45
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Suzuki M, Fujimura A, Sato A, Nagakawa J, Yamamoto N, Shiraishi H. In situdeformation of proton-irradiated molybdenum in a high-voltage electron microscope. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/01418619108221194] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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46
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Kitoh Y, Tsuruoka S, Ohmori M, Sugimoto K, Saitoh T, Fujimura A. Changes of neutrophil function during the interdialytic period. Clin Nephrol 2006; 65:75-7. [PMID: 16429848 DOI: 10.5414/cnp65075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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47
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Fujimura A. Pharmacokinetics of ranitidine and nizatidine in very elderly patients. Clin Pharmacol Ther 2004. [DOI: 10.1016/j.clpt.2003.11.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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48
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Seki S, Fujimura A. Three-dimensional changes in lymphatic architecture around VX2 tongue cancer--dynamic changes after administration of antiangiogenic agent. Lymphology 2003; 36:199-208. [PMID: 14992572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
We examined the three-dimensional changes of the lymphatic architecture in the rabbit VX2 tongue cancer model after administration of an antiangiogenic agent, TNP-470. TNP-470 at 30 mg/kg was administered via the auricular vein to the rabbit four times every other day from 3 days after transplantation of the tumor. The tongue and both sides of deep cervical lymph nodes of rabbit were observed at 10 days after transplantation. Lymph node metastasis was confirmed histopathologically. Morphological changes of collecting lymphatic vessels and lymphatic capillaries were observed, and the number and diameter of lymphatic vessels within 500 microm around the tumor were measured using the combined method with 5'-nucleotidase staining and three-dimensional reconstruction imaging. Tumor growth and lymph node metastasis were suppressed by administration of TNP-470. In the TNP-treatment group, the mean number of lymphatic capillaries was significantly fewer than in the control group. The mean diameter of collecting lymphatic vessels was significantly smaller than in the control group. In conclusion, our results suggest that cancer cell invasion into the lymphatics is probably decreased by inhibiting not only the growth of tumor but also new formation of lymphatic capillaries around the tumor by administration of TNP-470.
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Affiliation(s)
- S Seki
- First Department of Oral and Maxillofacial Surgery, School of Dentistry, Iwate Medical University, Morioka, Japan.
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49
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Oshima Y, Ueda M, Yamashita Y, Choi YL, Ota J, Ueno S, Ohki R, Koinuma K, Wada T, Ozawa K, Fujimura A, Mano H. DNA microarray analysis of hematopoietic stem cell-like fractions from individuals with the M2 subtype of acute myeloid leukemia. Leukemia 2003; 17:1990-7. [PMID: 14513049 DOI: 10.1038/sj.leu.2403098] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Acute myeloid leukemia (AML) may develop de novo or secondarily to myelodysplastic syndrome (MDS). Although the clinical outcome of MDS-related AML is worse than that of de novo AML, it is not easy to differentiate between these two clinical courses without a record of prior MDS. Large-scale profiling of gene expression by DNA microarray analysis is a promising approach with which to identify molecular markers specific to de novo or MDS-related AML. This approach has now been adopted with AC133-positive hematopoietic stem cell-like fractions purified from 10 individuals, each with either de novo or MDS-related AML of the M2 subtype. Sets of genes whose activity was associated with either disease course were identified. Furthermore, on the basis of the expression profiles of these genes, it was possible to predict correctly the clinical diagnosis for 17 (85%) of the 20 cases in a cross-validation trial. Similarly, different sets of genes were identified whose expression level was associated with clinical outcome after induction chemotherapy. These data suggest that, at least in terms of gene expression profiles, de novo AML and MDS-related AML are distinct clinical entities.
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MESH Headings
- Antigens, CD/genetics
- Antigens, CD34/genetics
- Base Sequence
- Blast Crisis/genetics
- Bone Marrow Cells/pathology
- DNA Primers
- Hematopoietic Stem Cells/classification
- Hematopoietic Stem Cells/pathology
- Humans
- Leukemia, Myeloid, Acute/drug therapy
- Leukemia, Myeloid, Acute/genetics
- Leukemia, Myeloid, Acute/pathology
- Microscopy, Fluorescence
- Oligonucleotide Array Sequence Analysis
- Predictive Value of Tests
- Reverse Transcriptase Polymerase Chain Reaction
- Transcription, Genetic
- Treatment Failure
- Treatment Outcome
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Affiliation(s)
- Y Oshima
- Division of Clinical Pharmacology, Jichi Medical School, Yakushiji, Kawachigun, Tochigi, Japan
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50
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Fujimura A, Seki S, Liao MY, Hu X, Onodera M, Nozaka Y. Three dimensional architecture of lymphatic vessels in the tongue. Lymphology 2003; 36:120-7. [PMID: 14552031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
We have three-dimensionally reconstructed the lymphatic architecture of the rabbit tongue using a computer graphic three-dimensional reconstruction method together with histochemically stained serial cryo-sections. Three collecting lymphatic vessels lying in an anteroposterior orientation were identified in the tongue body. A superior longitudinal muscle accompanying collecting lymphatic (SLCL) that lies in the border between superior longitudinal muscle and transverse muscle was identified in this study, in addition to collecting lymphatics in the lingual septum (LSCL) and deep lingual artery accompanying collecting lymphatics (DLCL) that we reported previously. The vertical muscle accompanying collecting lymphatics (VCL) and the transverse muscle accompanying collecting lymphatics (TCL) were also identified as collecting lymphatics that joined the above three collecting lymphatics. Specific regional lymph flow was identified for each collecting lymphatic. A transverse right/left cross flow was identified for the LSCL, while the SLCL served the upper 1/3 of the tongue and the DLCL served the lower 2/3 of the tongue. Each collecting lymphatic that accompanied the internal lingual muscles joined to the SLCL, DLCL and LSCL, and were derived from blind-ended lymphatic capillaries that ran in the endomysium. Internal lingual muscle accompanying collecting lymphatics joined each other in the endomysium, and their blind-ended lymphatic capillaries had no branches.
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Affiliation(s)
- A Fujimura
- First Department of Oral Anatomy, School of Dentistry, Iwate Medical University, Morioka, Japan.
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