LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 47

Search options

  1. Article ; Online: [Competition between T Cells for a Finite Epidermal Niche Promotes Selective Retention of Antigen-specific Memory T Cells in the Epidermis].

    Hirai, Toshiro

    Yakugaku zasshi : Journal of the Pharmaceutical Society of Japan

    2022  Volume 142, Issue 12, Page(s) 1327–1332

    Abstract: Tissue-resident memory T cells are a highly abundant, non-blood circulating subset of memory T cells. These appear to be the most protective population of memory T cells at barrier surfaces. Long-term retention and survival of tissue-resident memory ... ...

    Abstract Tissue-resident memory T cells are a highly abundant, non-blood circulating subset of memory T cells. These appear to be the most protective population of memory T cells at barrier surfaces. Long-term retention and survival of tissue-resident memory CD8
    MeSH term(s) CD8-Positive T-Lymphocytes ; Memory T Cells ; Epidermal Cells ; Epidermis ; Transforming Growth Factor beta
    Chemical Substances Transforming Growth Factor beta
    Language Japanese
    Publishing date 2022-12-01
    Publishing country Japan
    Document type English Abstract ; Journal Article
    ZDB-ID 200514-1
    ISSN 1347-5231 ; 0031-6903 ; 0372-7750 ; 0919-2085 ; 0919-2131
    ISSN (online) 1347-5231
    ISSN 0031-6903 ; 0372-7750 ; 0919-2085 ; 0919-2131
    DOI 10.1248/yakushi.22-00155
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Considerations of CD8

    Hirai, Toshiro / Yoshioka, Yasuo

    Frontiers in immunology

    2022  Volume 13, Page(s) 918611

    Abstract: The primary goal of vaccines that protect against respiratory viruses appears to be the induction of neutralizing antibodies for a long period. Although this goal need not be changed, recent severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ... ...

    Abstract The primary goal of vaccines that protect against respiratory viruses appears to be the induction of neutralizing antibodies for a long period. Although this goal need not be changed, recent severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants have drawn strong attention to another arm of acquired immunity, CD8
    MeSH term(s) Antibodies, Neutralizing ; CD8-Positive T-Lymphocytes ; COVID-19/prevention & control ; Humans ; SARS-CoV-2 ; Viral Vaccines
    Chemical Substances Antibodies, Neutralizing ; Viral Vaccines
    Language English
    Publishing date 2022-06-15
    Publishing country Switzerland
    Document type Journal Article ; Review ; 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.2022.918611
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Non-glycosylated G protein with CpG ODN provides robust protection against respiratory syncytial virus without inducing eosinophilia.

    Kawahara, Eigo / Shibata, Takehiko / Hirai, Toshiro / Yoshioka, Yasuo

    Frontiers in immunology

    2023  Volume 14, Page(s) 1282016

    Abstract: Introduction: Respiratory syncytial virus (RSV) vaccines targeting the fusion glycoprotein (F protein) are highly effective clinically in preventing RSV challenges. The attachment glycoprotein (G protein) is a potentially effective vaccine antigen ... ...

    Abstract Introduction: Respiratory syncytial virus (RSV) vaccines targeting the fusion glycoprotein (F protein) are highly effective clinically in preventing RSV challenges. The attachment glycoprotein (G protein) is a potentially effective vaccine antigen candidate, as it is important for cell adhesion during infection. However, vaccine-associated enhanced diseases in mice, such as eosinophilic lung inflammation following RSV challenge, are a concern with G protein vaccines. This study aimed to design an effective G protein vaccine with enhanced safety and efficacy by evaluating the efficacy and adverse reactions of vaccines composed of different recombinant G proteins and adjuvants in mice.
    Methods: Mice were subcutaneously immunized with glycosylated G protein expressed in mammalian cells (mG), non-glycosylated G protein expressed in
    Results: mG with any adjuvant was ineffective at inducing G-specific antibodies and had difficulty achieving both protection against RSV challenge and eosinophilia suppression. In particular, mG+CpG ODN induced G-specific T helper 1 (Th1) cells but only a few G-specific antibodies and did not protect against RSV challenge. However, eG+CpG ODN induced high levels of G-specific antibodies and Th1 cells and protected against RSV challenge without inducing pulmonary inflammation. Moreover, the combination vaccine of eG+F+CpG ODN showed greater protection against upper respiratory tract RSV challenge than using each single antigen vaccine alone.
    Discussion: These results indicate that the efficacy of recombinant G protein vaccines can be enhanced without inducing adverse reactions by using appropriate antigens and adjuvants, and their efficacy is further enhanced in the combination vaccine with F protein. These data provide valuable information for the clinical application of G protein vaccines.
    MeSH term(s) Mice ; Animals ; Respiratory Syncytial Virus Infections ; Antibodies, Viral ; Viral Fusion Proteins ; Respiratory Syncytial Virus, Human ; Pneumonia ; Adjuvants, Immunologic ; Recombinant Proteins ; Eosinophilia/prevention & control ; Vaccines ; GTP-Binding Proteins ; Oligodeoxyribonucleotides ; Glycoproteins ; Vaccines, Combined ; Mammals
    Chemical Substances Antibodies, Viral ; Viral Fusion Proteins ; Adjuvants, Immunologic ; Recombinant Proteins ; Vaccines ; GTP-Binding Proteins (EC 3.6.1.-) ; Oligodeoxyribonucleotides ; Glycoproteins ; Vaccines, Combined
    Language English
    Publishing date 2023-12-19
    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.2023.1282016
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Adjuvant-free parenterally injectable vaccine platform that harnesses previously induced IgG as an antigen delivery carrier.

    Kawai, Atsushi / Hirata, Haruki / Tokunoh, Nagisa / Ono, Chikako / Matsuura, Yoshiharu / Hirai, Toshiro / Yoshioka, Yasuo

    Biochemical and biophysical research communications

    2024  Volume 711, Page(s) 149919

    Abstract: Subunit vaccines are among the most useful vaccine modalities; however, their low immunogenicity necessitates the addition of adjuvants. Although adjuvants improve immune responses induced by vaccines, they often cause adverse reactions. To address this, ...

    Abstract Subunit vaccines are among the most useful vaccine modalities; however, their low immunogenicity necessitates the addition of adjuvants. Although adjuvants improve immune responses induced by vaccines, they often cause adverse reactions. To address this, we developed an adjuvant-free subunit vaccine platform that uses pre-existing antibodies generated from past infections or vaccinations as carriers for the delivery of vaccine antigens. Although we have confirmed the usefulness of this platform for nasal vaccines, its suitability as a parenterally injectable vaccine remains uncertain. Here, we verified the potential of our vaccine platform to harness pre-existing immunity for parenterally injectable vaccines. We generated RBD-HA by combining the receptor binding domain (RBD) derived from SARS-CoV-2 as a vaccine antigen with hemagglutinin (HA) sourced from influenza viruses to serve as the carrier protein. We revealed that subcutaneous vaccination with RBD-HA effectively triggered strong RBD-specific IgG responses in mice previously infected with the influenza A virus, even in the absence of adjuvants, and conferred protection to mice against SARS-CoV-2 upon challenge. Furthermore, we revealed that vaccination with RBD-HA did not induce an inflammatory response, such as inflammatory cytokine production, swelling, and recruitment of inflammatory immune cells, whereas conventional vaccines combined with adjuvants induced these adverse reactions. In addition, we demonstrated the remarkable versatility of this platform using a vaccine antigen derived from Streptococcus pneumoniae. These findings indicate the potential of this adjuvant-free vaccine platform to enhance the efficacy of parenterally injectable subunit vaccines and reduce adverse reactions.
    MeSH term(s) Animals ; Immunoglobulin G/immunology ; Immunoglobulin G/blood ; Mice ; SARS-CoV-2/immunology ; COVID-19/prevention & control ; COVID-19/immunology ; COVID-19 Vaccines/immunology ; COVID-19 Vaccines/administration & dosage ; Mice, Inbred BALB C ; Female ; Hemagglutinin Glycoproteins, Influenza Virus/immunology ; Hemagglutinin Glycoproteins, Influenza Virus/administration & dosage ; Humans ; Antibodies, Viral/immunology ; Spike Glycoprotein, Coronavirus/immunology ; Vaccines, Subunit/immunology ; Vaccines, Subunit/administration & dosage ; Adjuvants, Immunologic/administration & dosage ; Influenza A virus/immunology ; Influenza Vaccines/immunology ; Influenza Vaccines/administration & dosage
    Chemical Substances Immunoglobulin G ; COVID-19 Vaccines ; Hemagglutinin Glycoproteins, Influenza Virus ; Antibodies, Viral ; Spike Glycoprotein, Coronavirus ; Vaccines, Subunit ; Adjuvants, Immunologic ; spike protein, SARS-CoV-2 ; Influenza Vaccines
    Language English
    Publishing date 2024-04-07
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 205723-2
    ISSN 1090-2104 ; 0006-291X ; 0006-291X
    ISSN (online) 1090-2104 ; 0006-291X
    ISSN 0006-291X
    DOI 10.1016/j.bbrc.2024.149919
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: An inactivated whole-virion vaccine for Enterovirus D68 adjuvanted with CpG ODN or AddaVax elicits potent protective immunity in mice.

    Senpuku, Kota / Kataoka-Nakamura, Chikako / Kunishima, Yuta / Hirai, Toshiro / Yoshioka, Yasuo

    Vaccine

    2024  Volume 42, Issue 9, Page(s) 2463–2474

    Abstract: Enterovirus D68 (EV-D68), a pathogen that causes respiratory symptoms, mainly in children, has been implicated in acute flaccid myelitis, which is a poliomyelitis-like paralysis. Currently, there are no licensed vaccines or treatments for EV-D68 ... ...

    Abstract Enterovirus D68 (EV-D68), a pathogen that causes respiratory symptoms, mainly in children, has been implicated in acute flaccid myelitis, which is a poliomyelitis-like paralysis. Currently, there are no licensed vaccines or treatments for EV-D68 infections. Here, we investigated the optimal viral inactivation reagents, vaccine adjuvants, and route of vaccination in mice to optimize an inactivated whole-virion (WV) vaccine against EV-D68. We used formalin, β-propiolactone (BPL), and hydrogen peroxide as viral inactivation reagents and compared their effects on antibody responses. Use of any of these three viral inactivation reagents effectively induced neutralizing antibodies. Moreover, the antibody response induced by the BPL-inactivated WV vaccine was enhanced when adjuvanted with cytosine phosphoguanine oligodeoxynucleotide (CpG ODN) or AddaVax (MF59-like adjuvant), but not with aluminum hydroxide (alum). Consistent with the antibody response results, the protective effect of the inactivated WV vaccine against the EV-D68 challenge was enhanced when adjuvanted with CpG ODN or AddaVax, but not with alum. Further, while the intranasal inactivated WV vaccine induced EV-D68-specific IgA antibodies in the respiratory tract, it was less protective against EV-D68 challenge than the injectable vaccine. Thus, an injectable inactivated EV-D68 WV vaccine prepared with appropriate viral inactivation reagents and an optimal adjuvant is a promising EV-D68 vaccine.
    MeSH term(s) Humans ; Child ; Animals ; Mice ; Enterovirus D, Human ; Antibodies, Viral ; Vaccines, Inactivated ; Oligodeoxyribonucleotides ; Adjuvants, Immunologic ; Enterovirus Infections ; Alum Compounds ; Polysorbates ; Squalene
    Chemical Substances aluminum sulfate (34S289N54E) ; Addavax ; Antibodies, Viral ; Vaccines, Inactivated ; Oligodeoxyribonucleotides ; Adjuvants, Immunologic ; Alum Compounds ; Polysorbates ; Squalene (7QWM220FJH)
    Language English
    Publishing date 2024-03-11
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 605674-x
    ISSN 1873-2518 ; 0264-410X
    ISSN (online) 1873-2518
    ISSN 0264-410X
    DOI 10.1016/j.vaccine.2024.03.016
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: CpG ODN enhances the efficacy of F protein vaccine against respiratory syncytial virus infection in the upper respiratory tract via CD4

    Kawahara, Eigo / Yamamoto, Shinya / Shibata, Takehiko / Hirai, Toshiro / Yoshioka, Yasuo

    Biochemical and biophysical research communications

    2023  Volume 686, Page(s) 149143

    Abstract: Respiratory syncytial virus (RSV) is a leading cause of severe respiratory illness worldwide, particularly in infants and older adults. Vaccines targeting the fusion glycoprotein (F protein) -one of the surface antigens of RSV- are highly effective in ... ...

    Abstract Respiratory syncytial virus (RSV) is a leading cause of severe respiratory illness worldwide, particularly in infants and older adults. Vaccines targeting the fusion glycoprotein (F protein) -one of the surface antigens of RSV- are highly effective in preventing RSV-associated severe lower respiratory tract disease. However, the efficacy of these vaccines against upper respiratory tract challenge needs improvement. Here, we aimed to examine the efficacy of F protein vaccines with or without CpG oligodeoxynucleotide (CpG ODN) as an adjuvant in the upper and lower respiratory tracts in mice. F + CpG ODN induced higher levels of F-specific IgG than that induced by F alone; however, levels of neutralizing antibodies did not increase compared to those induced by F alone. F + CpG ODN induced T helper 1 (Th1) cells while F alone induced T helper 2 (Th2) cells. Moreover, F + CpG ODN improved the protection against RSV challenge in the upper respiratory tract compared to F alone, which was largely dependent on CD4
    MeSH term(s) Mice ; Humans ; Animals ; Aged ; Respiratory Syncytial Virus Infections/prevention & control ; Antibodies, Viral ; Respiratory Syncytial Virus, Human ; Antibodies, Neutralizing ; Th1 Cells ; Vaccines ; Nose ; Oligodeoxyribonucleotides ; Mice, Inbred BALB C
    Chemical Substances Antibodies, Viral ; Antibodies, Neutralizing ; Vaccines ; Oligodeoxyribonucleotides
    Language English
    Publishing date 2023-10-26
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 205723-2
    ISSN 1090-2104 ; 0006-291X ; 0006-291X
    ISSN (online) 1090-2104 ; 0006-291X
    ISSN 0006-291X
    DOI 10.1016/j.bbrc.2023.149143
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: Migration and Function of Memory CD8

    Hirai, Toshiro / Whitley, Sarah K / Kaplan, Daniel H

    The Journal of investigative dermatology

    2019  Volume 140, Issue 4, Page(s) 748–755

    Abstract: ... ...

    Abstract CD8
    MeSH term(s) Animals ; CD8-Positive T-Lymphocytes/immunology ; Humans ; Immunity, Cellular ; Immunologic Memory/immunology ; Skin/immunology
    Language English
    Publishing date 2019-12-04
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 80136-7
    ISSN 1523-1747 ; 0022-202X
    ISSN (online) 1523-1747
    ISSN 0022-202X
    DOI 10.1016/j.jid.2019.09.014
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Synergistic effect of non-neutralizing antibodies and interferon-γ for cross-protection against influenza.

    Shibuya, Meito / Tamiya, Shigeyuki / Kawai, Atsushi / Hirai, Toshiro / Cragg, Mark S / Yoshioka, Yasuo

    iScience

    2021  Volume 24, Issue 10, Page(s) 103131

    Abstract: Current influenza vaccines do not typically confer cross-protection against antigenically mismatched strains. To develop vaccines conferring broader cross-protection, recent evidence indicates the crucial role of both cross-reactive antibodies and viral- ... ...

    Abstract Current influenza vaccines do not typically confer cross-protection against antigenically mismatched strains. To develop vaccines conferring broader cross-protection, recent evidence indicates the crucial role of both cross-reactive antibodies and viral-specific CD4
    Language English
    Publishing date 2021-09-15
    Publishing country United States
    Document type Journal Article
    ISSN 2589-0042
    ISSN (online) 2589-0042
    DOI 10.1016/j.isci.2021.103131
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: Keratinocyte-derived TGFβ is not required to maintain skin immune homeostasis.

    Yang, Yi / Zenke, Yukari / Hirai, Toshiro / Kaplan, Daniel H

    Journal of dermatological science

    2019  Volume 94, Issue 2, Page(s) 290–297

    Abstract: Background: Transforming growth factor beta 1 (TGFβ) is known to be a regulator of autoimmunity. Loss of TGFβ leads to severe multi-organ autoimmunity in mice. In skin, role of TGFβ in suppressing autoimmunity is unclear.: Objective: Determine ... ...

    Abstract Background: Transforming growth factor beta 1 (TGFβ) is known to be a regulator of autoimmunity. Loss of TGFβ leads to severe multi-organ autoimmunity in mice. In skin, role of TGFβ in suppressing autoimmunity is unclear.
    Objective: Determine whether Keratinocyte (KC)-derived TGFβ is required for skin immune homeostasis.
    Methods: We generated K14-CreER
    Results: KC was the major source of TGFβ in epidermis. Topical tamoxifen application led to efficient TGFβ1 deletion. The expected acanthosis was observed but no inflammatory infiltrate or altered numbers of resident immune cells were evident. Similarly, Itgb6
    Conclusions: KC-derived TGFβ and epidermal TGFβ activation are not required to suppress skin autoimmunity in steady state.
    MeSH term(s) Animals ; Autoimmunity ; Gene Knockout Techniques ; Keratinocytes/immunology ; Keratinocytes/metabolism ; Mice ; Mice, Knockout ; Models, Animal ; Skin/cytology ; Skin/immunology ; Skin/metabolism ; Tamoxifen/pharmacology ; Transforming Growth Factor beta1/genetics ; Transforming Growth Factor beta1/immunology ; Transforming Growth Factor beta1/metabolism
    Chemical Substances Tgfb1 protein, mouse ; Transforming Growth Factor beta1 ; Tamoxifen (094ZI81Y45)
    Language English
    Publishing date 2019-05-07
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1024446-3
    ISSN 1873-569X ; 0923-1811
    ISSN (online) 1873-569X
    ISSN 0923-1811
    DOI 10.1016/j.jdermsci.2019.04.008
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: Intranasal immunization with an RBD-hemagglutinin fusion protein harnesses preexisting immunity to enhance antigen-specific responses.

    Kawai, Atsushi / Tokunoh, Nagisa / Kawahara, Eigo / Tamiya, Shigeyuki / Okamura, Shinya / Ono, Chikako / Anindita, Jessica / Tanaka, Hiroki / Akita, Hidetaka / Yamasaki, Sho / Kunisawa, Jun / Okamoto, Toru / Matsuura, Yoshiharu / Hirai, Toshiro / Yoshioka, Yasuo

    The Journal of clinical investigation

    2023  Volume 133, Issue 23

    Abstract: Intranasal vaccines are anticipated to be powerful tools for combating many infectious diseases, including SARS-CoV-2, because they induce not only systemic immunity but also mucosal immunity at the site of initial infection. However, they are generally ... ...

    Abstract Intranasal vaccines are anticipated to be powerful tools for combating many infectious diseases, including SARS-CoV-2, because they induce not only systemic immunity but also mucosal immunity at the site of initial infection. However, they are generally inefficient in inducing an antigen-specific immune response without adjuvants. Here, we developed an adjuvant-free intranasal vaccine platform that utilizes the preexisting immunity induced by previous infection or vaccination to enhance vaccine effectiveness. We made RBD-HA, a fusion of the receptor-binding domain (RBD) of spike derived from SARS-CoV-2 as a vaccine target with HA derived from influenza A virus (IAV) as a carrier protein. Intranasal immunization of previously IAV-infected mice with RBD-HA without an adjuvant elicited robust production of RBD-specific systemic IgG and mucosal IgA by utilizing both HA-specific preexisting IgG and CD4+ T cells. Consequently, the mice were efficiently protected from SARS-CoV-2 infection. Additionally, we demonstrated the high versatility of this intranasal vaccine platform by assessing various vaccine antigens and preexisting immunity associated with a variety of infectious diseases. The results of this study suggest the promising potential of this intranasal vaccine platform to address problems associated with intranasal vaccines.
    MeSH term(s) Animals ; Mice ; Hemagglutinins ; Influenza Vaccines ; Antibodies, Viral ; Immunization ; Vaccination ; Adjuvants, Immunologic/pharmacology ; Immunity, Mucosal ; Influenza A virus/genetics ; Immunoglobulin G ; Communicable Diseases
    Chemical Substances Hemagglutinins ; Influenza Vaccines ; Antibodies, Viral ; Adjuvants, Immunologic ; Immunoglobulin G
    Language English
    Publishing date 2023-12-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 3067-3
    ISSN 1558-8238 ; 0021-9738
    ISSN (online) 1558-8238
    ISSN 0021-9738
    DOI 10.1172/JCI166827
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top