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  1. Article: [Development of the next generation humanized mouse for drug discovery].

    Ito, Ryoji

    Nihon yakurigaku zasshi. Folia pharmacologica Japonica

    2018  Volume 151, Issue 4, Page(s) 160–165

    Abstract: A humanized mouse, which is efficiently engrafted human cells and tissues, is an important tool to mimic human physiology for biomedical researches. Since 2000s, severe combined immunodeficient mouse strains such as NOG, BRG, and NSG mice have been ... ...

    Abstract A humanized mouse, which is efficiently engrafted human cells and tissues, is an important tool to mimic human physiology for biomedical researches. Since 2000s, severe combined immunodeficient mouse strains such as NOG, BRG, and NSG mice have been generated. They are great recipients to create humanized mouse models compared to previous other immunodeficient strains due to their multiple dysfunctions of innate and acquired immunity. Especially, the transfer of human hematopoietic stem cells into these immunodeficient mice has been enabled to reconstitute human immune systems, because the mice show high engraftment level of human leukocyte in peripheral blood (~50%), spleen and bone marrow (60~90%) and generate well-differentiated multilineage human immune cells including lymphoid and myeloid lineage cells. Using these mice, several human disease models such as cancer, allergy, graft-versus-host disease (GVHD), and etc. have been established to understand the pathogenic mechanisms of the diseases and to evaluate the efficacy and safety of novel drugs. In this review, I provide an overview of recent advances in the humanized mouse technology, including generation of novel platforms of genetically modified NOG (next generation NOG) mice and some applications of them to create human disease models for drug discovery in preclinical researches.
    MeSH term(s) Animals ; Disease Models, Animal ; Drug Discovery ; Humans ; Hypersensitivity ; Mice ; Neoplasms
    Language Japanese
    Publishing date 2018-04-05
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 1097532-9
    ISSN 1347-8397 ; 0015-5691
    ISSN (online) 1347-8397
    ISSN 0015-5691
    DOI 10.1254/fpj.151.160
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Eagle's Syndrome.

    Miyagawa, Shun / Ono, Ryohei / Ito, Ryoji / Kitagawa, Izumi

    Internal medicine (Tokyo, Japan)

    2022  Volume 61, Issue 16, Page(s) 2553

    MeSH term(s) Humans ; Ossification, Heterotopic/diagnosis ; Ossification, Heterotopic/diagnostic imaging ; Temporal Bone/abnormalities ; Temporal Bone/diagnostic imaging
    Language English
    Publishing date 2022-02-01
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 32371-8
    ISSN 1349-7235 ; 0021-5120 ; 0918-2918
    ISSN (online) 1349-7235
    ISSN 0021-5120 ; 0918-2918
    DOI 10.2169/internalmedicine.9017-21
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Do geographical indications preserve farming in rural areas? Evidence from a natural experiment in Japan

    Takayama, Taisuke / Norito, Takashi / Nakatani, Tomoaki / Ito, Ryoji

    Food policy. 2021 July, v. 102

    2021  

    Abstract: Geographical indications (GIs), or signs on products indicating a region of origin, are expected to secure higher incomes and retain the rural population in less favored or remote areas. In this study, we examine the effect of GIs on the maintenance of ... ...

    Abstract Geographical indications (GIs), or signs on products indicating a region of origin, are expected to secure higher incomes and retain the rural population in less favored or remote areas. In this study, we examine the effect of GIs on the maintenance of farming using a case study on Uonuma rice, with region-of-origin labeling, produced only in the Uonuma district of Niigata prefecture in Japan. Although Uonuma rice is not yet an official GI, it qualifies in principle for GI registration under its long-standing reputation for quality and GI-like protection by the producer’s organization. We exploit a municipal merger in a district adjacent to Uonuma district as a natural experiment, in which a hitherto homogeneous region was split and one section became part of Uonuma district. Using detailed community-level panel data, we find that there is a positive effect on the number of farm households and the area of operated farmland in a rural community. Also, producing Uonuma rice led to older farmers continuing to farm due to higher rice prices. Meanwhile, we found no evidence that the adoption of Uonuma rice had a positive effect on the number of young farmers. This may make it difficult to maintain the rural community due to the aging of community members.
    Keywords Japan ; agricultural land ; case studies ; farms ; food policy ; provenance ; rice ; rural communities ; rural population
    Language English
    Dates of publication 2021-07
    Publishing place Elsevier Ltd
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 194840-4
    ISSN 0306-9192
    ISSN 0306-9192
    DOI 10.1016/j.foodpol.2021.102101
    Database NAL-Catalogue (AGRICOLA)

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  4. Article: Acute infectious purpura fulminans with

    Yamamoto, Shinya / Ito, Ryoji

    IDCases

    2019  Volume 15, Page(s) e00514

    Abstract: Acute infectious purpura fulminans (AIPF) is a rare, life-threatening disease commonly caused ... ...

    Abstract Acute infectious purpura fulminans (AIPF) is a rare, life-threatening disease commonly caused by
    Language English
    Publishing date 2019-03-01
    Publishing country Netherlands
    Document type Case Reports
    ZDB-ID 2745454-X
    ISSN 2214-2509
    ISSN 2214-2509
    DOI 10.1016/j.idcr.2019.e00514
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Establishment of a human microbiome- and immune system-reconstituted dual-humanized mouse model.

    Ka, Yuyo / Ito, Ryoji / Nozu, Ryoko / Tomiyama, Kayo / Ueno, Masami / Ogura, Tomoyuki / Takahashi, Riichi

    Experimental animals

    2023  Volume 72, Issue 3, Page(s) 402–412

    Abstract: Humanized mice are widely used to study the human immune system in vivo and investigate therapeutic targets for various human diseases. Immunodeficient NOD/Shi-scid- ... ...

    Abstract Humanized mice are widely used to study the human immune system in vivo and investigate therapeutic targets for various human diseases. Immunodeficient NOD/Shi-scid-IL2rγ
    MeSH term(s) Mice ; Animals ; Humans ; Mice, Inbred NOD ; Immune System ; Hematopoietic Stem Cells ; Disease Models, Animal ; Gastrointestinal Microbiome ; Mice, SCID
    Language English
    Publishing date 2023-04-04
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 2088228-2
    ISSN 1881-7122 ; 1341-1357 ; 0007-5124
    ISSN (online) 1881-7122
    ISSN 1341-1357 ; 0007-5124
    DOI 10.1538/expanim.23-0025
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Novel mechanisms by which benralizumab suppresses IgE expression in human B cells in humanized mice.

    Nunomura, Satoshi / Ito, Ryoji / Nanri, Yasuhiro / Ohno, Yusuke / Honda, Yuko / Takedomi, Hironobu / Izuhara, Kenji

    Allergy

    2023  Volume 78, Issue 12, Page(s) 3271–3273

    MeSH term(s) Humans ; Mice ; Animals ; Antibodies, Monoclonal, Humanized/pharmacology ; Antibodies, Monoclonal, Humanized/therapeutic use ; Asthma/drug therapy ; Immunoglobulin E/therapeutic use ; Anti-Asthmatic Agents/therapeutic use ; Eosinophils ; Disease Progression
    Chemical Substances benralizumab (71492GE1FX) ; Antibodies, Monoclonal, Humanized ; Immunoglobulin E (37341-29-0) ; Anti-Asthmatic Agents
    Language English
    Publishing date 2023-10-10
    Publishing country Denmark
    Document type Letter ; Research Support, Non-U.S. Gov't
    ZDB-ID 391933-x
    ISSN 1398-9995 ; 0105-4538
    ISSN (online) 1398-9995
    ISSN 0105-4538
    DOI 10.1111/all.15914
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Improved Detection of

    Katano, Ikumi / Ito, Ryoji / Kawai, Kenji / Takahashi, Takeshi

    Frontiers in immunology

    2020  Volume 11, Page(s) 532684

    Abstract: We generated an NOD/Shi- ...

    Abstract We generated an NOD/Shi-
    MeSH term(s) Animals ; Antibody-Dependent Cell Cytotoxicity ; Carrier Proteins/genetics ; Carrier Proteins/immunology ; Humans ; Interleukin-15/genetics ; Interleukin-15/immunology ; Killer Cells, Natural/immunology ; Mice ; Mice, Knockout ; Receptors, IgG/deficiency ; Receptors, IgG/immunology
    Chemical Substances Carrier Proteins ; IL15 protein, human ; Interleukin-15 ; Receptors, IgG ; noggin protein (148294-77-3)
    Language English
    Publishing date 2020-10-07
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2606827-8
    ISSN 1664-3224 ; 1664-3224
    ISSN (online) 1664-3224
    ISSN 1664-3224
    DOI 10.3389/fimmu.2020.532684
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Exophiala dermatitidis

    Miyoshi, Seigo / Tanabe, Miyuki / Semba, Mayuko / Sato, Chika / Aoyama, Sanae / Watanabe, Akira / Ito, Ryoji / Hamada, Kumi / Abe, Masahiro

    Respirology case reports

    2023  Volume 11, Issue 10, Page(s) e01221

    Abstract: Six years ago, a 60-year-old man presented to our hospital with a cough and sputum. Upon suspicion of nontuberculous mycobacterial (NTM) infection, he was followed up at our hospital. Because the abnormal shadows in the bilateral lung fields deteriorated ...

    Abstract Six years ago, a 60-year-old man presented to our hospital with a cough and sputum. Upon suspicion of nontuberculous mycobacterial (NTM) infection, he was followed up at our hospital. Because the abnormal shadows in the bilateral lung fields deteriorated slightly over 6 years, bronchoscopy was performed.
    Language English
    Publishing date 2023-09-13
    Publishing country United States
    Document type Case Reports
    ZDB-ID 2750180-2
    ISSN 2051-3380
    ISSN 2051-3380
    DOI 10.1002/rcr2.1221
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Fatty Acids Play a Critical Role in Mitochondrial Oxidative Phosphorylation in Effector T Cells in Graft-versus-Host Disease.

    Nakano, Hirofumi / Sato, Kazuya / Izawa, Junko / Takayama, Norihito / Hayakawa, Hiroko / Ikeda, Takashi / Kawaguchi, Shin-Ichiro / Mashima, Kiyomi / Umino, Kento / Morita, Kaoru / Ito, Ryoji / Ohno, Nobuhiko / Tominaga, Kaoru / Endo, Hitoshi / Kanda, Yoshinobu

    ImmunoHorizons

    2024  Volume 8, Issue 3, Page(s) 228–241

    Abstract: Although the role of aerobic glycolysis in activated T cells has been well characterized, whether and how fatty acids (FAs) contribute to donor T cell function in allogeneic hematopoietic stem cell transplantation is unclear. Using xenogeneic graft- ... ...

    Abstract Although the role of aerobic glycolysis in activated T cells has been well characterized, whether and how fatty acids (FAs) contribute to donor T cell function in allogeneic hematopoietic stem cell transplantation is unclear. Using xenogeneic graft-versus-host disease (GVHD) models, this study demonstrated that exogenous FAs serve as a crucial source of mitochondrial respiration in donor T cells in humans. By comparing human T cells isolated from wild-type NOD/Shi-scid-IL2rγnull (NOG) mice with those from MHC class I/II-deficient NOG mice, we found that donor T cells increased extracellular FA uptake, the extent of which correlates with their proliferation, and continued to increase FA uptake during effector differentiation. Gene expression analysis showed the upregulation of a wide range of lipid metabolism-related genes, including lipid hydrolysis, mitochondrial FA transport, and FA oxidation. Extracellular flux analysis demonstrated that mitochondrial FA transport was required to fully achieve the mitochondrial maximal respiration rate and spare respiratory capacity, whereas the substantial disruption of glucose supply by either glucose deprivation or mitochondrial pyruvate transport blockade did not impair oxidative phosphorylation. Taken together, FA-driven mitochondrial respiration is a hallmark that differentiates TCR-dependent T cell activation from TCR-independent immune response after hematopoietic stem cell transplant.
    MeSH term(s) Humans ; Animals ; Mice ; Mice, Inbred NOD ; Oxidative Phosphorylation ; T-Lymphocytes ; Graft vs Host Disease ; Fatty Acids ; Glucose ; Mice, SCID ; Receptors, Antigen, T-Cell
    Chemical Substances Fatty Acids ; Glucose (IY9XDZ35W2) ; Receptors, Antigen, T-Cell
    Language English
    Publishing date 2024-03-05
    Publishing country United States
    Document type Journal Article
    ISSN 2573-7732
    ISSN (online) 2573-7732
    DOI 10.4049/immunohorizons.2300115
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Liposome-encapsulated progesterone efficiently suppresses B-lineage cell proliferation.

    Seki, Toshiro / Suzuki, Rikio / Ohshima, Shino / Manabe, Yoshiyuki / Onoue, Shion / Hoshino, Yuki / Yasuda, Atsushi / Ito, Ryoji / Kawada, Hiroshi / Ishimoto, Hitoshi / Shiina, Takashi / Kametani, Yoshie

    Biochemistry and biophysics reports

    2024  Volume 38, Page(s) 101710

    Abstract: Progesterone suppresses several ancient pathways in a concentration-dependent manner. Based on these characteristics, progesterone is considered a candidate anticancer drug. However, the concentration of progesterone used for therapy should be higher ... ...

    Abstract Progesterone suppresses several ancient pathways in a concentration-dependent manner. Based on these characteristics, progesterone is considered a candidate anticancer drug. However, the concentration of progesterone used for therapy should be higher than the physiological concentration, which makes it difficult to develop progesterone-based anticancer drugs. We previously developed liposome-encapsulated progesterone (Lipo-P4) with enhanced anticancer effects, which strongly suppressed triple-negative breast cancer cell proliferation in humanized mice. In this study, we aimed to clarify whether Lipo-P4 effectively suppresses the proliferation of B-lineage cancer cells. We selected six B-cell lymphoma and two myeloma cell lines, and analyzed their surface markers using flow cytometry. Next, we prepared liposome-encapsulated progesterone and examined its effect on cell proliferation in these B-lineage cancer cells, three ovarian clear cell carcinoma cell lines, two prostate carcinoma cell lines, and one triple-negative breast cancer adenocarcinoma cell line. Lipo-P4 suppressed the proliferation of all cancer cell lines. All B-lineage cell lines, except for the HT line, were more susceptible than the other cell types, regardless of the expression of differentiation markers. Empty liposomes did not suppress cell proliferation. These results suggest that progesterone encapsulated in liposomes efficiently inhibits the proliferation of B-lineage cells and may become an anticancer drug candidate for B-lineage cancers.
    Language English
    Publishing date 2024-04-11
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 2831046-9
    ISSN 2405-5808 ; 2405-5808
    ISSN (online) 2405-5808
    ISSN 2405-5808
    DOI 10.1016/j.bbrep.2024.101710
    Database MEDical Literature Analysis and Retrieval System OnLINE

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