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Tanaka T, Tashiro M, Ota K, Fujita A, Sawai T, Kadota J, Fukuda Y, Sumiyoshi M, Ide S, Tachikawa N, Fujii H, Hibino M, Shiomi H, Izumida M, Matsui K, Yamauchi M, Takahashi K, Yamanashi H, Sugimoto T, Akabame S, Umeda M, Shimizu M, Hosogaya N, Kosai K, Takeda K, Iwanaga N, Ashizawa N, Hirayama T, Takazono T, Yamamoto K, Imamura Y, Miyazaki T, Kobayashi Y, Ariyoshi K, Mukae H, Yanagihara K, Kita K, Izumikawa K. Safety and efficacy of 5-aminolevulinic acid phosphate/iron in mild-to-moderate coronavirus disease 2019: A randomized exploratory phase II trial. Medicine (Baltimore) 2023; 102:e34858. [PMID: 37653769 PMCID: PMC10470697 DOI: 10.1097/md.0000000000034858] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 06/09/2023] [Accepted: 07/31/2023] [Indexed: 09/02/2023] Open
Abstract
BACKGROUND 5-aminolevulinic acid (5-ALA), a natural amino acid that is marketed alongside sodium ferrous citrate (SFC) as a functional food, blocks severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) proliferation in vitro and exerts anti-inflammatory effects. In this phase II open-label, prospective, parallel-group, randomized trial, we aimed to evaluate the safety and efficacy of 5-ALA in patients with mild-to-moderate coronavirus disease 2019. METHODS This trial was conducted in patients receiving 5-ALA/SFC (250/145 mg) orally thrice daily for 7 days, followed by 5-ALA/SFC (150/87 mg) orally thrice daily for 7 days. The primary endpoints were changes in SARS-CoV-2 viral load, clinical symptom scores, and 5-ALA/SFC safety (adverse events [AE] and changes in laboratory values and vital signs). RESULTS A total of 50 patients were enrolled from 8 institutions in Japan. The change in SARS-CoV-2 viral load from baseline was not significantly different between the 5-ALA/SFC (n = 24) and control (n = 26) groups. The duration to improvement was shorter in the 5-ALA/SFC group than in the control group, although the difference was not significant. The 5-ALA/SFC group exhibited faster improvement rates in "taste abnormality," "cough," "lethargy," and "no appetite" than the control group. Eight AEs were observed in the 5-ALA/SFC group, with 22.7% of patients experiencing gastrointestinal symptoms (decreased appetite, constipation, and vomiting). AEs occurred with 750/435 mg/day in 25.0% of patients in the first phase and with 450/261 mg/day of 5-ALA/SFC in 6.3% of patients in the second phase. CONCLUSION 5-ALA/SFC improved some symptoms but did not influence the SARS-CoV-2 viral load or clinical symptom scores over 14 days. The safety of 5-ALA/SFC in this study was acceptable. Further evaluation using a larger sample size or modified method is warranted.
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Affiliation(s)
- Takeshi Tanaka
- Infection Control and Education Center, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
| | - Masato Tashiro
- Infection Control and Education Center, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
- Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki-shi, Nagasaki, Japan
| | - Kenji Ota
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
| | - Ayumi Fujita
- Infection Control and Education Center, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
| | - Toyomitsu Sawai
- Department of Respiratory Medicine, Nagasaki Harbor Medical Center, Nagasaki-shi, Nagasaki, Japan
| | - Junichi Kadota
- Department of Respiratory Medicine, Nagasaki Harbor Medical Center, Nagasaki-shi, Nagasaki, Japan
| | - Yuichi Fukuda
- Department of Respiratory Medicine, Sasebo City General Hospital, Sasebo-shi, Nagasaki, Japan
| | - Makoto Sumiyoshi
- Department of Respiratory Medicine, Isahaya General Hospital, Japan Community Health Care Organization, Isahaya-shi, Nagasaki, Japan
| | - Shotaro Ide
- Department of Respiratory Medicine, Isahaya General Hospital, Japan Community Health Care Organization, Isahaya-shi, Nagasaki, Japan
| | - Natsuo Tachikawa
- Department of Infectious Diseases, Yokohama Municipal Citizen’s Hospital, Yokohama-shi, Kanagawa, Japan
| | - Hiroshi Fujii
- Department of Respiratory Medicine, Kobe City Medical Center West Hospital, Kobe-shi, Hyogo, Japan
| | - Makoto Hibino
- Department of Respiratory Medicine, Shonan Fujisawa Tokushukai Hospital, Fujisawa-shi, Kanagawa, Japan
| | - Hisanori Shiomi
- Department of Surgery, Nagahama Red Cross Hospital, Nagahama-shi, Shiga, Japan
| | - Mai Izumida
- Department of Infectious Diseases, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
| | - Kohsuke Matsui
- Department of Infectious Diseases, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
| | - Momoko Yamauchi
- Department of Infectious Diseases, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
| | - Kensuke Takahashi
- Department of Infectious Diseases, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
| | - Hirotomo Yamanashi
- Department of Infectious Diseases, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
- Department of General Medicine, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
| | - Takashi Sugimoto
- Department of Infectious Diseases, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
| | - Shogo Akabame
- Department of General Medicine, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
| | - Masataka Umeda
- Department of General Medicine, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
| | - Masumi Shimizu
- Department of Infectious Diseases, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
| | - Naoki Hosogaya
- Clinical Research Center, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
| | - Kosuke Kosai
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
| | - Kazuaki Takeda
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
| | - Naoki Iwanaga
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
| | - Nobuyuki Ashizawa
- Infection Control and Education Center, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
| | - Tatsuro Hirayama
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
| | - Takahiro Takazono
- Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki-shi, Nagasaki, Japan
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
| | - Kazuko Yamamoto
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
| | - Yoshifumi Imamura
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
| | - Taiga Miyazaki
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
| | - Yusuke Kobayashi
- Clinical Development Department, Neopharma Japan Co. Ltd., Chiyoda-ku, Tokyo, Japan
| | - Koya Ariyoshi
- Department of Infectious Diseases, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
| | - Hiroshi Mukae
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki-shi, Nagasaki, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
| | - Kiyoshi Kita
- School of Tropical Medicine and Global Health, Nagasaki University, Nagasaki-shi, Nagasaki, Japan
- Department of Host-Defense Biochemistry, Institute of Tropical Medicine Nagasaki University, Nagasaki-shi, Nagasaki, Japan
| | - Koichi Izumikawa
- Infection Control and Education Center, Nagasaki University Hospital, Nagasaki-shi, Nagasaki, Japan
- Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki-shi, Nagasaki, Japan
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Izumida M, Kakoki K, Hayashi H, Matsuyama T, Kubo Y. Rab3a, a small GTP-binding protein, is required for the stabilization of the murine leukaemia virus Gag protein. Small GTPases 2022; 13:162-182. [PMID: 34180342 PMCID: PMC9707528 DOI: 10.1080/21541248.2021.1939631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
We recently identified a CD63-interacting protein to understand the role of CD63 in virion production of the human immunodeficiency virus type 1, and we have found that Rab3a forms a complex with CD63. In this study, we analysed the effect of Rab3a on virion production of the murine leukaemia virus (MLV), which is another member of the retrovirus family. We found that Rab3a silencing induced lysosomal degradation of the MLV Gag protein, and recovery of the Rab3a expression restored the level of the Gag protein through a complex formation of MLV Gag and Rab3a, indicating that Rab3a is required for MLV Gag protein expression. In contrast, CD63 silencing decreased the infectivity of released virions but had no effect on virion production, indicating that CD63 facilitates the infectivity of released MLV particles. Although Rab3a induced CD63 degradation in uninfected cells, the complex of MLV Gag and Rab3a suppressed the Rab3a-mediated CD63 degradation in MLV-infected cells. Finally, we found that the MLV Gag protein interacts with Rab3a to stabilize its own protein and CD63 that facilitates the infectivity of released MLV particles. Considering the involvement of Rab3a in lysosome trafficking to the plasma membrane, it may also induce cell surface transport of the MLV Gag protein.
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Affiliation(s)
- Mai Izumida
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan,Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Katsura Kakoki
- Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan,Japan Association for Development of Community Medicine, Urology Department, Omura Municipal Hospital, Nagasaki, Japan
| | - Hideki Hayashi
- Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan,Medical University Research Administrator, Nagasaki University School of Medicine, Nagasaki, Japan
| | - Toshifumi Matsuyama
- Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan,Department of Cancer Stem Cell, Institute of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Yoshinao Kubo
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan,Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan,Program for Nurturing Global Leaders in Tropical and Emerging Communicable Diseases, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan,CONTACT Yoshinao Kubo Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki852-8523, Japan
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3
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Izumida M, Hayashi H, Smith C, Ishibashi F, Suga K, Kubo Y. Antivirus activity, but not thiolreductase activity, is conserved in interferon-gamma-inducible GILT protein in arthropod. Mol Immunol 2021; 140:240-249. [PMID: 34773863 DOI: 10.1016/j.molimm.2021.10.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 10/22/2021] [Accepted: 10/26/2021] [Indexed: 12/12/2022]
Abstract
We have previously reported that gamma-interferon inducible lysosomal thiolreductase (GILT) functions as a host defense factor against retroviruses by digesting disulfide bonds on viral envelope proteins. GILT is widely conserved even in plants and fungi as well as animals. The thiolreductase active site of mammalian GILT is composed of a CXXC amino acid motif, whereas the C-terminal cysteine residue is changed to serine in arthropods including shrimps, crabs, and flies. GILT from Penaeus monodon (PmGILT) also has the CXXS motif instead of the CXXC active site. We demonstrate here that a human GILT mutant (GILT C75S) with the CXXS motif and PmGILT significantly inhibit amphotropic murine leukemia virus vector infection in human cells without alterning its expression level and lysosomal localization, showing that the C-terminal cysteine residue of the active site is not required for the antiviral activity. We have reported that human GILT suppresses HIV-1 particle production by digestion of disulfide bonds on CD63. However, GILT C75S mutant and PmGILT did not digest CD63 disulfide bonds, and had no effect on HIV-1 virion production, suggesting that they do not have thiolreductase activity. Taken together, this study found that antiviral activity, but not thiolreductase activity, is conserved in arthropod GILT proteins. This finding provides a new insight that the common function of GILT is antiviral activity in many animals.
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Affiliation(s)
- Mai Izumida
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Hideki Hayashi
- Medical University Research Administrator, Nagasaki University School of Medicine, Nagasaki, Japan
| | - Chris Smith
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan; School of Tropical Medicine and Global Health, Nagasaki University, Japan; Department of Clinical Research, London School of Hygiene and Tropical Medicine, United Kingdom
| | - Fumito Ishibashi
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Nagasaki, Japan
| | - Koushirou Suga
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Nagasaki, Japan; Organization for Marine Science and Technology, Nagasaki University, Nagasaki, Japan
| | - Yoshinao Kubo
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan; Program for Nurturing Global Leaders in Tropical Medicine and Emerging Communicable Diseases, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan.
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Abstract
Gene editing using CRISPR/Cas9 is a promising method to cure many human genetic diseases. We have developed an efficient system to deliver Cas9 into the adeno-associated virus integration site 1 (AAVS1) locus, known as a safe harbor, using lentivirus and AAV viral vectors, as a step toward future in vivo transduction. First, we introduced Cas9v1 (derived from Streptococcus pyogenes) at random into the genome using a lentiviral vector. Cas9v1 activity was used when the N-terminal 1.9 kb, and C-terminal 2.3 kb fragments of another Cas9v2 (human codon-optimized) were employed sequentially with specific single-guide RNAs (sgRNAs) and homology donors carried by AAV vectors into the AAVS1 locus. Then, Cas9v1 was removed from the genome by another AAV vector containing sgRNA targeting the long terminal repeat of the lentivirus vector. The reconstituted Cas9v2 in the AAVS1 locus was functional and gene editing was efficient.
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Affiliation(s)
- Hideki Hayashi
- Medical University Research Administrator, Nagasaki University School of Medicine, Nagasaki, Japan.
| | - Yoshinao Kubo
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Mai Izumida
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Toshifumi Matsuyama
- Department of Pathology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
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5
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Yamanashi H, Nobusue K, Nonaka F, Honda Y, Shimizu Y, Kawashiri SY, Izumida M, Kubo Y, Tamai M, Nagata Y, Yanagihara K, Kulkarni B, Kinra S, Kawakami A, Maeda T. Human T-cell lymphotropic virus type-1 infection associated with sarcopenia: community-based cross-sectional study in Goto, Japan. Aging (Albany NY) 2020; 12:15504-15513. [PMID: 32706758 PMCID: PMC7467371 DOI: 10.18632/aging.103736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 07/07/2020] [Indexed: 11/25/2022]
Abstract
Sarcopenia is characterized by a progressive skeletal muscle disorder that involves the loss of muscle mass and low muscle strength, which contributes to increased adverse outcomes. Few studies have investigated the association between chronic infection and sarcopenia. This study aimed to examine the association between human T-cell lymphotropic virus type-1 (HTLV-1) and sarcopenia. We conducted a cross-sectional study and enrolled 2,811 participants aged ≥ 40 years from a prospective cohort study in Japanese community dwellers during 2017-2019. Sarcopenia was defined as low appendicular skeletal muscle mass and low handgrip strength. The association between HTLV-1 seropositivity and sarcopenia was assessed using multivariable logistic regression. Odds ratio (OR) and 95% confidence interval (CI) of sarcopenia were analysed using HTLV-1 seropositivity. We adjusted for age, sex, body mass index, physical activity, systolic blood pressure, glycated haemoglobin, low-density lipoprotein cholesterol, and smoking and drinking status. Of 2,811 participants, 484 (17.2%) HTLV-1 infected participants were detected. HTLV-1 infection was significantly associated with sarcopenia (adjusted OR 1.46, 95% CI 1.03-2.07, P = 0.034). HTLV-1 was associated with sarcopenia among community-dwelling adults. Active surveillance and early detection of asymptomatic HTLV-1 infection might be beneficial to reinforce countermeasures to inhibit the progress of HTLV infection-associated sarcopenia.
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Affiliation(s)
- Hirotomo Yamanashi
- Department of General Medicine, Nagasaki University Graduate School of Biomedical Sciences, Sakamoto, Nagasaki 852-8501, Japan.,Department of Infectious Diseases, Nagasaki University Hospital, Sakamoto, Nagasaki 852-8501, Japan.,Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Sakamoto, Nagasaki 852-8523, Japan
| | - Kenichi Nobusue
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Sakamoto, Nagasaki 852-8523, Japan.,Department of Island and Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Goto, Nagasaki 853-8691, Japan
| | - Fumiaki Nonaka
- Department of Island and Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Goto, Nagasaki 853-8691, Japan
| | - Yukiko Honda
- Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Sakamoto, Nagasaki 852-8523, Japan
| | - Yuji Shimizu
- Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Sakamoto, Nagasaki 852-8523, Japan
| | - Shin-Ya Kawashiri
- Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Sakamoto, Nagasaki 852-8523, Japan.,Department of Immunology and Rheumatology, Nagasaki University Graduate School of Biomedical Sciences, Sakamoto, Nagasaki 852-8523, Japan
| | - Mai Izumida
- Department of General Medicine, Nagasaki University Graduate School of Biomedical Sciences, Sakamoto, Nagasaki 852-8501, Japan.,Department of Infectious Diseases, Nagasaki University Hospital, Sakamoto, Nagasaki 852-8501, Japan.,Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Sakamoto, Nagasaki 852-8523, Japan
| | - Yoshinao Kubo
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Sakamoto, Nagasaki 852-8523, Japan
| | - Mami Tamai
- Department of Immunology and Rheumatology, Nagasaki University Graduate School of Biomedical Sciences, Sakamoto, Nagasaki 852-8523, Japan
| | - Yasuhiro Nagata
- Department of Innovative Development of Human Resources for Comprehensive Community Care, Nagasaki University Graduate School of Biomedical Sciences, Sakamoto, Nagasaki 852-8523, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Sakamoto, Nagasaki 852-8523, Japan
| | - Bharati Kulkarni
- Clinical Division, National Institute of Nutrition, Hyderabad 500007, India
| | - Sanjay Kinra
- Clinical Division, National Institute of Nutrition, Hyderabad 500007, India.,Department of Non-communicable Disease Epidemiology, London School of Hygiene and Tropical Medicine, London WC1E 7HT, UK
| | - Atsushi Kawakami
- Department of Immunology and Rheumatology, Nagasaki University Graduate School of Biomedical Sciences, Sakamoto, Nagasaki 852-8523, Japan
| | - Takahiro Maeda
- Department of General Medicine, Nagasaki University Graduate School of Biomedical Sciences, Sakamoto, Nagasaki 852-8501, Japan.,Department of Island and Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Goto, Nagasaki 853-8691, Japan.,Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Sakamoto, Nagasaki 852-8523, Japan
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Izumida M, Hayashi H, Tanaka A, Kubo Y. Cathepsin B Protease Facilitates Chikungunya Virus Envelope Protein-Mediated Infection via Endocytosis or Macropinocytosis. Viruses 2020; 12:v12070722. [PMID: 32635194 PMCID: PMC7412492 DOI: 10.3390/v12070722] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 05/27/2020] [Revised: 06/29/2020] [Accepted: 07/02/2020] [Indexed: 02/07/2023] Open
Abstract
Chikungunya virus (CHIKV) is an enveloped virus that enters host cells and transits within the endosomes before starting its replication cycle, the precise mechanism of which is yet to be elucidated. Endocytosis and endosome acidification inhibitors inhibit infection by CHIKV, murine leukemia virus (MLV), or SARS-coronavirus, indicating that these viral entries into host cells occur through endosomes and require endosome acidification. Although endosomal cathepsin B protease is necessary for MLV, Ebola virus, and SARS-CoV infections, its role in CHIKV infection is unknown. Our results revealed that endocytosis inhibitors attenuated CHIKV-pseudotyped MLV vector infection in 293T cells but not in TE671 cells. In contrast, macropinocytosis inhibitors attenuated CHIKV-pseudotyped MLV vector infection in TE671 cells but not in 293T cells, suggesting that CHIKV host cell entry occurs via endocytosis or macropinocytosis, depending on the cell lines used. Cathepsin B inhibitor and knockdown by an shRNA suppressed CHIKV-pseudotyped MLV vector infection both in 293T and TE671 cells. These results show that cathepsin B facilitates CHIKV infection regardless of the entry pathway.
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Affiliation(s)
- Mai Izumida
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki 852-8523, Japan
- Correspondence: (M.I.); (Y.K.)
| | - Hideki Hayashi
- Medical University Research Administrator, Nagasaki University School of Medicine, Nagasaki 852-8523, Japan;
| | - Atsushi Tanaka
- Research Institute for Microbial Diseases, Osaka University, Osaka 565-0871, Japan;
| | - Yoshinao Kubo
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki 852-8523, Japan
- Program for Nurturing Global Leaders in Tropical and Emerging Communicable Diseases, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki 852-8523, Japan
- Correspondence: (M.I.); (Y.K.)
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Izumida M, Togawa K, Hayashi H, Matsuyama T, Kubo Y. Production of Vesicular Stomatitis Virus Glycoprotein-Pseudotyped Lentiviral Vector Is Enhanced by Ezrin Silencing. Front Bioeng Biotechnol 2020; 8:368. [PMID: 32411688 PMCID: PMC7201057 DOI: 10.3389/fbioe.2020.00368] [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: 10/26/2019] [Accepted: 04/02/2020] [Indexed: 11/17/2022] Open
Abstract
Human immunodeficiency virus type 1 (HIV-1)-based viral vector is widely used as a biomaterial to transfer a gene of interest into target cells in many biological study fields including gene therapy. Vesicular stomatitis virus glycoprotein (VSV-G)-containing HIV-1 vector much more efficiently transduces various mammalian cells than other viral envelope proteins-containing vectors. Understanding the mechanism would contribute to development of a novel method of efficient HIV-1 vector production. HIV-1 vector is generally constructed by transient transfection of human 293T or African green monkey COS7 cells. It was found in this study that HIV-1 Gag protein is constitutively digested in lysosomes of African green monkey cells. Surprisingly, VSV-G elevated HIV-1 Gag protein levels, suggesting that VSV-G protects Gag protein from the lysosomal degradation. Unphosphorylated ezrin, but not phosphorylated ezrin, was detected in COS7 cells, and ezrin silencing elevated Gag protein levels in the presence of VSV-G. Expression of unphosphorylated ezrin reduced Gag protein amounts. These results indicate that unphosphorylated ezrin proteins inhibit the VSV-G-mediated stabilization of HIV-1 Gag protein. Trafficking of HIV-1 Gag-associated intracellular vesicles may be controlled by ezrin. Finally, this study found that ezrin silencing yields higher amount of VSV-G-pseudotyped HIV-1 vector.
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Affiliation(s)
- Mai Izumida
- Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan.,Program for Nurturing Global Leaders in Tropical and Emerging Communicable Diseases, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Kei Togawa
- Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Hideki Hayashi
- Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan.,Medical University Research Administrator, Nagasaki University School of Medicine, Nagasaki, Japan
| | - Toshifumi Matsuyama
- Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan.,Department of Cancer Stem Cell Biology, Institute of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Yoshinao Kubo
- Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan.,Program for Nurturing Global Leaders in Tropical and Emerging Communicable Diseases, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan.,Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
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Izumida M, Suga K, Ishibashi F, Kubo Y. The Spirocyclic Imine from a Marine Benthic Dinoflagellate, Portimine, Is a Potent Anti-Human Immunodeficiency Virus Type 1 Therapeutic Lead Compound. Mar Drugs 2019; 17:md17090495. [PMID: 31450557 PMCID: PMC6780162 DOI: 10.3390/md17090495] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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: 07/16/2019] [Revised: 08/13/2019] [Accepted: 08/22/2019] [Indexed: 02/04/2023] Open
Abstract
In this study, we aimed to find chemicals from lower sea animals with defensive effects against human immunodeficiency virus type 1 (HIV-1). A library of marine natural products consisting of 80 compounds was screened for activity against HIV-1 infection using a luciferase-encoding HIV-1 vector. We identified five compounds that decreased luciferase activity in the vector-inoculated cells. In particular, portimine, isolated from the benthic dinoflagellate Vulcanodinium rugosum, exhibited significant anti-HIV-1 activity. Portimine inhibited viral infection with an 50% inhibitory concentration (IC50) value of 4.1 nM and had no cytotoxic effect on the host cells at concentrations less than 200 nM. Portimine also inhibited vesicular stomatitis virus glycoprotein (VSV-G)-pseudotyped HIV-1 vector infection. This result suggested that portimine mainly targeted HIV-1 Gag or Pol protein. To analyse which replication steps portimine affects, luciferase sequences were amplified by semi-quantitative PCR in total DNA. This analysis revealed that portimine inhibits HIV-1 vector infection before or at the reverse transcription step. Portimine has also been shown to have a direct effect on reverse transcriptase using an in vitro reverse transcriptase assay. Portimine efficiently inhibited HIV-1 replication and is a potent lead compound for developing novel therapeutic drugs against HIV-1-induced diseases.
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Affiliation(s)
- Mai Izumida
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki 852-8523, Japan.
- Department of Community Medicine, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki 852-8523, Japan.
| | - Koushirou Suga
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Nagasaki 852-8521, Japan
| | - Fumito Ishibashi
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Nagasaki 852-8521, Japan
| | - Yoshinao Kubo
- Program for Nurturing Global Leaders in Tropical Medicine and Emerging Communicable Diseases, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki 852-8523, Japan.
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9
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Kubo Y, Izumida M, Togawa K, Zhang F, Hayashi H. Cytoplasmic R-peptide of murine leukemia virus envelope protein negatively regulates its interaction with the cell surface receptor. Virology 2019; 532:82-87. [PMID: 31035110 DOI: 10.1016/j.virol.2019.04.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 04/15/2019] [Accepted: 04/15/2019] [Indexed: 11/18/2022]
Abstract
Cytoplasmic tails of envelope (Env) glycoproteins of many retroviruses inhibit their membrane fusion activity. The cytoplasmic 16-amino acid peptide of ecotropic murine leukemia virus (E-MLV) Env protein, called the R-peptide, also inhibits the membrane fusion activity of the Env protein. However, the molecular mechanism of the inhibition has not been elucidated yet. In this study, we found that R-peptide-containing Env protein of E-MLV binds to the cell surface receptor cationic amino acid transporter-1 (CAT-1) with weaker affinity than R-peptide-truncated Env protein. Consistent with this result, R-peptide-containing Env protein had less efficient inhibition of E-MLV vector infection than R-peptide-truncated Env protein. R-peptide truncation has been reported to induce conformational change in the surface subunit of E-MLV Env protein that interacts with the receptor. Taken together, our findings indicate that R-peptide truncation induces conformational change in the receptor-binding domain of the E-MLV Env protein and facilitates the Env-receptor interaction.
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Affiliation(s)
- Yoshinao Kubo
- Program for Nurturing Global Leaders in Tropical Medicine and Emerging Communicable Diseases, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan.
| | - Mai Izumida
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Kei Togawa
- Program for Nurturing Global Leaders in Tropical Medicine and Emerging Communicable Diseases, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Fengmin Zhang
- Department of Microbiology, Harbin Medical University, Harbin, China
| | - Hideki Hayashi
- Medical University Research Administrator, Nagasaki University School of Medicine, Nagasaki, Japan
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10
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Kamiyama H, Izumida M, Umemura Y, Hayashi H, Matsuyama T, Kubo Y. Role of Ezrin Phosphorylation in HIV-1 Replication. Front Microbiol 2018; 9:1912. [PMID: 30210460 PMCID: PMC6119696 DOI: 10.3389/fmicb.2018.01912] [Citation(s) in RCA: 5] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Accepted: 07/30/2018] [Indexed: 11/15/2022] Open
Abstract
Host-cell expression of the ezrin protein is required for CXCR4 (X4)-tropic HIV-1 infection. Ezrin function is regulated by phosphorylation at threonine-567. This study investigates the role of ezrin phosphorylation in HIV-1 infection and virion release. We analyzed the effects of ezrin mutations involving substitution of threonine-567 by alanine (EZ-TA), a constitutively inactive mutant, or by aspartic acid (EZ-TD), which mimics phosphorylated threonine. We also investigated the effects of ezrin silencing on HIV-1 virion release using a specific siRNA. We observed that X4-tropic HIV-1 vector infection was inhibited by expression of the EZ-TA mutant but increased by expression of the EZ-TD mutant, suggesting that ezrin phosphorylation in target cells is required for efficient HIV-1 entry. Expression of a dominant-negative mutant of ezrin (EZ-N) and ezrin silencing in HIV-1 vector-producing cells significantly reduced the infectivity of released virions without affecting virion production. This result indicates that endogenous ezrin expression is required for virion infectivity. The EZ-TD but not the EZ-TA inhibited virion release from HIV-1 vector-producing cells. Taken together, these findings suggest that ezrin phosphorylation in target cells is required for efficient HIV-1 entry but inhibits virion release from HIV-1 vector-producing cells.
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Affiliation(s)
- Haruka Kamiyama
- Department of AIDS Research, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan.,Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Mai Izumida
- Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan.,Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Yuria Umemura
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Hideki Hayashi
- Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan.,Medical University Research Administrator (MEDURA), Nagasaki University School of Medicine, Nagasaki, Japan
| | - Toshifumi Matsuyama
- Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan.,Department of Cancer Stem Cell Biology, Institute of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Yoshinao Kubo
- Department of AIDS Research, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan.,Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan.,Program for Nurturing Global Leaders in Tropical and Emerging Communicable Diseases, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
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11
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Yasui K, Izumida M, Nakagawa T, Kubo Y, Hayashi H, Ito T, Ikeda H, Matsuyama T. MicroRNA-3662 expression correlates with antiviral drug resistance in adult T-cell leukemia/lymphoma cells. Biochem Biophys Res Commun 2018; 501:833-837. [PMID: 29684346 DOI: 10.1016/j.bbrc.2018.04.159] [Citation(s) in RCA: 5] [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: 03/26/2018] [Accepted: 04/19/2018] [Indexed: 11/28/2022]
Abstract
Interferon regulatory factor (IRF) 4 and the proto-oncogene c-Rel cooperate in growth and antiviral drug resistance of adult T-cell leukemia/lymphoma (ATLL). To elucidate the target of IRF4 and c-Rel in ATLL, we determined the simultaneous binding sites of IRF4 and c-Rel using ChIP-seq technology. Nine genes were identified within 2 kb of binding sites, including MIR3662. Expression of miR-3662 was regulated by IRF4, and to a lesser extent by c-Rel. Cell proliferation was inhibited by knockdown of miR-3662 and expression of miR-3662 was correlated with antiviral drug resistance in ATLL cell lines. Thus, miR-3662 represents a target for therapies against ATLL.
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Affiliation(s)
- Kiyoshi Yasui
- Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8523, Japan; Department of Oncology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8523, Japan
| | - Mai Izumida
- Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8523, Japan; Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki, 852-8523, Japan
| | - Takeya Nakagawa
- Department of Biochemistry, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8523, Japan
| | - Yoshinao Kubo
- Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8523, Japan; Program for Nurturing Global Leaders in Tropical and Emerging Communicable Diseases, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Hideki Hayashi
- Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8523, Japan
| | - Takashi Ito
- Department of Biochemistry, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8523, Japan
| | - Hiroaki Ikeda
- Department of Oncology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8523, Japan
| | - Toshifumi Matsuyama
- Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8523, Japan; Department of Cancer Stem Cell Biology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8523, Japan.
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12
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Hayashi H, Kubo Y, Izumida M, Takahashi E, Kido H, Sato K, Yamaya M, Nishimura H, Nakayama K, Matsuyama T. Enterokinase Enhances Influenza A Virus Infection by Activating Trypsinogen in Human Cell Lines. Front Cell Infect Microbiol 2018; 8:91. [PMID: 29629340 PMCID: PMC5876233 DOI: 10.3389/fcimb.2018.00091] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [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: 11/17/2017] [Accepted: 03/07/2018] [Indexed: 12/22/2022] Open
Abstract
Cleavage and activation of hemagglutinin (HA) by trypsin-like proteases in influenza A virus (IAV) are essential prerequisites for its successful infection and spread. In host cells, some transmembrane serine proteases such as TMPRSS2, TMPRSS4 and HAT, along with plasmin in the bloodstream, have been reported to cleave the HA precursor (HA0) molecule into its active forms, HA1 and HA2. Some trypsinogens can also enhance IAV proliferation in some cell types (e.g., rat cardiomyoblasts). However, the precise activation mechanism for this process is unclear, because the expression level of the physiological activator of the trypsinogens, the TMPRSS15 enterokinase, is expected to be very low in such cells, with the exception of duodenal cells. Here, we show that at least two variant enterokinases are expressed in various human cell lines, including A549 lung-derived cells. The exogenous expression of these enterokinases was able to enhance the proliferation of IAV in 293T human kidney cells, but the proliferation was reduced by knocking down the endogenous enterokinase in A549 cells. The enterokinase was able to enhance HA processing in the cells, which activated trypsinogen in vitro and in the IAV-infected cells also. Therefore, we conclude that enterokinase plays a role in IAV infection and proliferation by activating trypsinogen to process viral HA in human cell lines.
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Affiliation(s)
- Hideki Hayashi
- Medical University Research Administrator, Nagasaki University School of Medicine, Nagasaki, Japan
| | - Yoshinao Kubo
- Program for Nurturing Global Leaders in Tropical and Emerging Communicable Diseases, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Mai Izumida
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Etsuhisa Takahashi
- Division of Enzyme Chemistry, Institute for Enzyme Research, Tokushima University, Tokushima, Japan
| | - Hiroshi Kido
- Division of Enzyme Chemistry, Institute for Enzyme Research, Tokushima University, Tokushima, Japan
| | - Ko Sato
- Virus Research Center, Clinical Research Division, Sendai Medical Center, Sendai, Japan
| | - Mutsuo Yamaya
- Department of Advanced Preventive Medicine for Infectious Disease, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hidekazu Nishimura
- Virus Research Center, Clinical Research Division, Sendai Medical Center, Sendai, Japan
| | - Kou Nakayama
- Medical University Research Administrator, Nagasaki University School of Medicine, Nagasaki, Japan
| | - Toshifumi Matsuyama
- Department of Cancer Stem Cell Biology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
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13
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Kubo Y, Izumida M, Yashima Y, Yoshii-Kamiyama H, Tanaka Y, Yasui K, Hayashi H, Matsuyama T. Gamma-interferon-inducible, lysosome/endosome-localized thiolreductase, GILT, has anti-retroviral activity and its expression is counteracted by HIV-1. Oncotarget 2018; 7:71255-71273. [PMID: 27655726 PMCID: PMC5342076 DOI: 10.18632/oncotarget.12104] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [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: 06/11/2016] [Accepted: 08/26/2016] [Indexed: 11/25/2022] Open
Abstract
The mechanism by which type II interferon (IFN) inhibits virus replications remains to be identified. Murine leukemia virus (MLV) replication was significantly restricted by γ-IFN, but not human immunodeficiency virus type 1 (HIV-1) replication. Because MLV enters host cells via endosomes, we speculated that certain cellular factors among γ-IFN-induced, endosome-localized proteins inhibit MLV replication. We found that γ-IFN-inducible lysosomal thiolreductase (GILT) significantly restricts HIV-1 replication as well as MLV replication by its thiolreductase activity. GILT silencing enhanced replication-defective HIV-1 vector infection and virion production in γ-IFN-treated cells, although γ-IFN did not inhibit HIV-1 replication. This result showed that GILT is required for the anti-viral activity of γ-IFN. Interestingly, GILT protein level was increased by γ-IFN in uninfected cells and env-deleted HIV-1-infected cells, but not in full-length HIV-1-infected cells. γ-IFN-induced transcription from the γ-IFN-activation sequence was attenuated by the HIV-1 Env protein. These results suggested that the γ-IFN cannot restrict HIV-1 replication due to the inhibition of γ-IFN signaling by HIV-1 Env. Finally, we found that 4,4′-dithiodipyridine (4-PDS), which inhibits S-S bond formation at acidic pH, significantly suppresses HIV-1 vector infection and virion production, like GILT. In conclusion, this study showed that GILT functions as a host restriction factor against the retroviruses, and a GILT mimic, 4-PDS, is the leading compound for the development of novel concept of anti-viral agents.
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Affiliation(s)
- Yoshinao Kubo
- Division of Cytokine Signaling, Graduate School of Medical Sciences, Nagasaki University, Nagasaki, Japan.,Department of AIDS Research, Institute of Tropical Medicine, G-COE, Nagasaki University, Nagasaki, Japan
| | - Mai Izumida
- Division of Cytokine Signaling, Graduate School of Medical Sciences, Nagasaki University, Nagasaki, Japan
| | - Yuka Yashima
- Division of Cytokine Signaling, Graduate School of Medical Sciences, Nagasaki University, Nagasaki, Japan
| | - Haruka Yoshii-Kamiyama
- Division of Cytokine Signaling, Graduate School of Medical Sciences, Nagasaki University, Nagasaki, Japan.,Department of AIDS Research, Institute of Tropical Medicine, G-COE, Nagasaki University, Nagasaki, Japan
| | - Yuetsu Tanaka
- Department of Immunology, Graduate School and Faculty of Medicine, University of the Ryukyus, Okinawa, Japan
| | - Kiyoshi Yasui
- Division of Cytokine Signaling, Graduate School of Medical Sciences, Nagasaki University, Nagasaki, Japan
| | - Hideki Hayashi
- Division of Cytokine Signaling, Graduate School of Medical Sciences, Nagasaki University, Nagasaki, Japan
| | - Toshifumi Matsuyama
- Division of Cytokine Signaling, Graduate School of Medical Sciences, Nagasaki University, Nagasaki, Japan.,Present address: Department of Gastroenterology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
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14
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Izumida M. Placenta formation by human endogenous retrovirus is inhibited by interferons. Placenta 2017. [DOI: 10.1016/j.placenta.2017.08.051] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Kubo Y, Masumoto H, Izumida M, Kakoki K, Hayashi H, Matsuyama T. Rab3a-Bound CD63 Is Degraded and Rab3a-Free CD63 Is Incorporated into HIV-1 Particles. Front Microbiol 2017; 8:1653. [PMID: 28900422 PMCID: PMC5581869 DOI: 10.3389/fmicb.2017.01653] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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: 03/23/2017] [Accepted: 08/15/2017] [Indexed: 01/23/2023] Open
Abstract
CD63, a member of the tetraspanin family, is involved in virion production by human immunodeficiency virus type 1 (HIV-1), but its mechanism is unknown. In this study, we showed that a small GTP-binding protein, Rab3a, interacts with CD63. When Rab3a was exogenously expressed, the amounts of CD63 decreased in cells. The Rab3a-mediated reduction of CD63 was suppressed by lysosomal and proteasomal inhibitors. The amount of CD63 was increased by reducing the endogenous Rab3a level using a specific shRNA. These results indicate that Rab3a binds to CD63 to induce the degradation of CD63. Rab3a is thought to be involved in exocytosis, but we found that another function of Rab3a affects the fate of CD63 in lysosomes. CD63 interacted with Rab3a and was incorporated into HIV-1 particles. However, Rab3a was not detected in HIV-1 virions, thereby indicating that Rab3a-free CD63, but not Rab3a-bound CD63, is incorporated into HIV-1 particles. Overexpression or silencing of Rab3a moderately reduced HIV-1 virion formation. Overexpression of Rab3a decreased CD63 levels, but did not affect the incorporation of CD63 into HIV-1 particles. This study showed that Rab3a binds to CD63 to induce the degradation of CD63, and only Rab3a-free CD63 is incorporated into HIV-1 particles.
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Affiliation(s)
- Yoshinao Kubo
- Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki UniversityNagasaki, Japan.,Program for Nurturing Global Leaders in Tropical and Emerging Communicable Diseases, Graduate School of Biomedical Sciences, Nagasaki UniversityNagasaki, Japan
| | - Hiroshi Masumoto
- Biomedical Research Support Center, Nagasaki University School of MedicineNagasaki, Japan
| | - Mai Izumida
- Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki UniversityNagasaki, Japan.,Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki UniversityNagasaki, Japan
| | - Katsura Kakoki
- Department of Urology, Graduate School of Biomedical Sciences, Nagasaki UniversityNagasaki, Japan
| | - Hideki Hayashi
- Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki UniversityNagasaki, Japan.,Medical University Research Administrator, Nagasaki University School of MedicineNagasaki, Japan
| | - Toshifumi Matsuyama
- Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki UniversityNagasaki, Japan
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16
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Izumida M, Kamiyama H, Suematsu T, Honda E, Koizumi Y, Yasui K, Hayashi H, Ariyoshi K, Kubo Y. Fragments of Target Cells are Internalized into Retroviral Envelope Protein-Expressing Cells during Cell-Cell Fusion by Endocytosis. Front Microbiol 2016; 6:1552. [PMID: 26834711 PMCID: PMC4717186 DOI: 10.3389/fmicb.2015.01552] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 11/11/2015] [Accepted: 12/21/2015] [Indexed: 12/05/2022] Open
Abstract
Retroviruses enter into host cells by fusion between viral and host cell membranes. Retroviral envelope glycoprotein (Env) induces the membrane fusion, and also mediates cell-cell fusion. There are two types of cell-cell fusions induced by the Env protein. Fusion-from-within is induced by fusion between viral fusogenic Env protein-expressing cells and susceptible cells, and virions induce fusion-from-without by fusion between adjacent cells. Although entry of ecotropic murine leukemia virus (E-MLV) requires host cell endocytosis, the involvement of endocytosis in cell fusion is unclear. By fluorescent microscopic analysis of the fusion-from-within, we found that fragments of target cells are internalized into Env-expressing cells. Treatment of the Env-expressing cells with an endocytosis inhibitor more significantly inhibited the cell fusion than that of the target cells, indicating that endocytosis in Env-expressing cells is required for the cell fusion. The endocytosis inhibitor also attenuated the fusion-from-without. Electron microscopic analysis suggested that the membrane fusion resulting in fusion-from-within initiates in endocytic membrane dents. This study shows that two types of the viral cell fusion both require endocytosis, and provides the cascade of fusion-from-within.
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Affiliation(s)
- Mai Izumida
- Division of Cytokine Signaling, Graduate School of Biomedical Sciences, Nagasaki UniversityNagasaki, Japan; Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki UniversityNagasaki, Japan
| | - Haruka Kamiyama
- Division of Cytokine Signaling, Graduate School of Biomedical Sciences, Nagasaki UniversityNagasaki, Japan; Department of AIDS Research, Institute of Tropical Medicine, Nagasaki UniversityNagasaki, Japan
| | - Takashi Suematsu
- Central Electron Microscope Laboratory, Nagasaki University School of Medicine Nagasaki, Japan
| | - Eri Honda
- Division of Cytokine Signaling, Graduate School of Biomedical Sciences, Nagasaki University Nagasaki, Japan
| | - Yosuke Koizumi
- Division of Cytokine Signaling, Graduate School of Biomedical Sciences, Nagasaki University Nagasaki, Japan
| | - Kiyoshi Yasui
- Division of Cytokine Signaling, Graduate School of Biomedical Sciences, Nagasaki University Nagasaki, Japan
| | - Hideki Hayashi
- Division of Cytokine Signaling, Graduate School of Biomedical Sciences, Nagasaki University Nagasaki, Japan
| | - Koya Ariyoshi
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University Nagasaki, Japan
| | - Yoshinao Kubo
- Division of Cytokine Signaling, Graduate School of Biomedical Sciences, Nagasaki UniversityNagasaki, Japan; Department of AIDS Research, Institute of Tropical Medicine, Nagasaki UniversityNagasaki, Japan
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17
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Kakoki K, Kamiyama H, Izumida M, Yashima Y, Hayashi H, Yamamoto N, Matsuyama T, Igawa T, Sakai H, Kubo Y. Androgen-independent proliferation of LNCaP prostate cancer cells infected by xenotropic murine leukemia virus-related virus. Biochem Biophys Res Commun 2014; 447:216-22. [DOI: 10.1016/j.bbrc.2014.03.154] [Citation(s) in RCA: 2] [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] [Received: 03/10/2014] [Accepted: 03/31/2014] [Indexed: 12/19/2022]
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18
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Kakoki K, Shinohara A, Izumida M, Koizumi Y, Honda E, Kato G, Igawa T, Sakai H, Hayashi H, Matsuyama T, Morita T, Koshimoto C, Kubo Y. Susceptibility of muridae cell lines to ecotropic murine leukemia virus and the cationic amino acid transporter 1 viral receptor sequences: implications for evolution of the viral receptor. Virus Genes 2014; 48:448-56. [PMID: 24469466 DOI: 10.1007/s11262-014-1036-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Accepted: 01/09/2014] [Indexed: 10/25/2022]
Abstract
Ecotropic murine leukemia viruses (Eco-MLVs) infect mouse and rat, but not other mammalian cells, and gain access for infection through binding the cationic amino acid transporter 1 (CAT1). Glycosylation of the rat and hamster CAT1s inhibits Eco-MLV infection, and treatment of rat and hamster cells with a glycosylation inhibitor, tunicamycin, enhances Eco-MLV infection. Although the mouse CAT1 is also glycosylated, it does not inhibit Eco-MLV infection. Comparison of amino acid sequences between the rat and mouse CAT1s shows amino acid insertions in the rat protein near the Eco-MLV-binding motif. In addition to the insertion present in the rat CAT1, the hamster CAT1 has additional amino acid insertions. In contrast, tunicamycin treatment of mink and human cells does not elevate the infection, because their CAT1s do not have the Eco-MLV-binding motif. To define the evolutionary pathway of the Eco-MLV receptor, we analyzed CAT1 sequences and susceptibility to Eco-MLV infection of other several murinae animals, including the southern vole (Microtus rossiaemeridionalis), large Japanese field mouse (Apodemus speciosus), and Eurasian harvest mouse (Micromys minutus). Eco-MLV infection was enhanced by tunicamycin in these cells, and their CAT1 sequences have the insertions like the hamster CAT1. Phylogenetic analysis of mammalian CAT1s suggested that the ancestral CAT1 does not have the Eco-MLV-binding motif, like the human CAT1, and the mouse CAT1 is thought to be generated by the amino acid deletions in the third extracellular loop of CAT1.
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Affiliation(s)
- Katsura Kakoki
- Division of Cytokine Signaling, Graduate School of Biomedical Sciences, Nagasaki University, 1-12-4 Sakamoto, Nagasaki, 852-8523, Japan
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Kamiyama H, Kakoki K, Shigematsu S, Izumida M, Yashima Y, Tanaka Y, Hayashi H, Matsuyama T, Sato H, Yamamoto N, Sano T, Shidoji Y, Kubo Y. CXCR4-tropic, but not CCR5-tropic, human immunodeficiency virus infection is inhibited by the lipid raft-associated factors, acyclic retinoid analogs, and cholera toxin B subunit. AIDS Res Hum Retroviruses 2013; 29:279-88. [PMID: 22845664 DOI: 10.1089/aid.2012.0174] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Development of an effective low-cost anti-acquired immunodeficiency syndrome (AIDS) drugs is needed for treatment of AIDS patients in developing countries. Host cell lipid raft microdomains, which are enriched with cholesterol, glycolipids, ceramide, and gangliosides, are important for human immunodeficiency virus type 1 (HIV-1) entry. Retinoid analogs have been shown to modulate ceramide levels in the cell membrane, while cholera toxin B subunit (CT-B) specifically binds to the ganglioside GM1. In this study, we found that the acyclic retinoid analogs geranylgeranoic acid (GGA) and NIK-333 as well as CT-B efficiently attenuate CXCR4-tropic, but not CCR5-tropic, HIV-1 vector infection. We also found that GGA and NIK-333 suppress CXCR4-tropic HIV-1 infection by attenuating CXCR4 expression. CT-B also attenuated CXCR4-tropic HIV-1 infection, but did not suppress CXCR4 expression. These results suggest a distinct role for lipid raft microdomains in CXCR4- and CCR5-tropic HIV-1 infections and illuminate novel agents for the development of AIDS therapy.
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Affiliation(s)
- Haruka Kamiyama
- Division of Cytokine Signaling, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
- Department of AIDS Research, Institute of Tropical Medicine, G-COE, Nagasaki University, Nagasaki, Japan
- Department of Molecular and Cellular Biology, Graduate School of Human Health Sciences, University of Nagasaki, Nagasaki, Japan
| | - Katsura Kakoki
- Division of Cytokine Signaling, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
- Department of AIDS Research, Institute of Tropical Medicine, G-COE, Nagasaki University, Nagasaki, Japan
| | - Sayuri Shigematsu
- Division of Cytokine Signaling, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Mai Izumida
- Division of Cytokine Signaling, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Yuka Yashima
- Division of Cytokine Signaling, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Yuetsu Tanaka
- Department of Immunology, Graduate School and Faculty of Medicine, University of the Ryukyu, Okinawa, Japan
| | - Hideki Hayashi
- Division of Cytokine Signaling, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Toshifumi Matsuyama
- Division of Cytokine Signaling, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Hironori Sato
- Department of AIDS Research, Institute of Tropical Medicine, G-COE, Nagasaki University, Nagasaki, Japan
- Laboratory of Viral Genomics, Pathogen Genomics Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - Naoki Yamamoto
- Department of AIDS Research, Institute of Tropical Medicine, G-COE, Nagasaki University, Nagasaki, Japan
- Department of Microbiology, National University of Singapore, Singapore, Singapore
| | | | - Yoshihiro Shidoji
- Department of Molecular and Cellular Biology, Graduate School of Human Health Sciences, University of Nagasaki, Nagasaki, Japan
| | - Yoshinao Kubo
- Division of Cytokine Signaling, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
- Department of AIDS Research, Institute of Tropical Medicine, G-COE, Nagasaki University, Nagasaki, Japan
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Yasukawa K, Akihisa T, Kanno H, Kaminaga T, Izumida M, Sakoh T, Tamura T, Takido M. Inhibitory effects of sterols isolated from Chlorella vulgaris on 12-0-tetradecanoylphorbol-13-acetate-induced inflammation and tumor promotion in mouse skin. Biol Pharm Bull 1996; 19:573-6. [PMID: 8860961 DOI: 10.1248/bpb.19.573] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.6] [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: 02/02/2023]
Abstract
Inhibitory activity against 12-O-tetradecanoylphorbol-13-acetate (TPA)-induced inflammation in mice was observed in the methanol extract of Chlorella vulgaris, a green alga. The hexane soluble fraction obtained from the methanol extract exhibited marked inhibitory activity from which were isolated two delta(5,7)-sterols (ergosterol and 7-dehydroporiferasterol), two delta(5,7,9(11))-sterols [7,9(11)-dehydroergosterol and 7,9(11)-bisdehydroporiferasterol], two 5 alpha, 8 alpha-epidioxy-delta(6)-sterols (ergosterol peroxide and 7-dehydroporiferasterol peroxide), and a 7-oxo-delta(5)-sterol (7-oxocholesterol), among others. The delta 5'7-sterols, 5 alpha, 8 alpha-epidioxy-delta(6)-sterols and 7-oxo-delta 5-sterol inhibited TPA-induced inflammation in mice. The 50% inhibitory dose of these compounds for TPA-induced inflammation was 0.2-0.7 mg/ear. Furthermore, ergosterol peroxide markedly inhibited the tumor-promoting effect of TPA in 7,12-dimethylbenz[a]anthracene-initiated mice.
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Affiliation(s)
- K Yasukawa
- College of Pharmacy, Nihon University, Japan
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Izumida M. [A chronic spinal cord compression model in a rat with a 354A tumor]. Nihon Seikeigeka Gakkai Zasshi 1995; 69:977-991. [PMID: 8551099] [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] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
A posterior spinal cord compression model was produced in a rat with a 354 A tumor. Here we report the compression process using MRI (at 2.11 tesla), the progression of paralysis in the posterior limbs, the pathological changes in the neural tissues, and the spinal evoked potentials (SpEPs). A relatively flat spinal cord compression model was established by the interposition of free fatty tissue between the tumor and dura mater. The anteroposterior diameter of the compressed cord (AP), the width of the compressed cord (W), the cross-sectional areas of the spine (A), the mean of the anteroposterior diameters of the cord at the levels of the adjacent cephalic and caudal vertebral bodies (AP), and the mean of the cross-sectional areas of the cord at the levels of the adjacent cephalic and caudal vertebral bodies (A) were measured on axial views from MRI. Paralysis of the posterior limbs occurred in this model when A/A became less than 60%, AP/AP became less than 35% and AP/W became less than 20%. Pathological changes became apparent in the neural tissues when A/A became less than 50-60%, AP/AP became less than 25-30% and AP/W became less than 15%. Polyphasic wave-forms were noted when A/A became less than 60%, AP/AP became less than 35% and AP/W became less than 20%. When the A/A became less than 40%, the histopathological changes became marked. SpEPs could no longer be detected at this degree of compression, indicating that all neural conduction had been blocked.
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Affiliation(s)
- M Izumida
- Department of Orthopaedic Surgery, Nagoya City University Medical School, Aichi, Japan
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