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2019 年度 実施状況報告書

高齢者における歯肉溝経由ワクチンの有効性とその実際

研究課題

研究課題/領域番号 19K10097
研究機関日本大学

研究代表者

Cueno Marni  日本大学, 歯学部, 専修研究員 (20569967)

研究期間 (年度) 2019-04-01 – 2022-03-31
キーワードinfluenza A / influenza B / gingival vaccine
研究実績の概要

We were able to produce the molecular structures of the different protein antigens that would be used throughout the study. More specifically, both influenza A H3N2 and B/Yamagata hemagglutinins were successfully designed in silico and, more importantly, are commercially available. We were able to publish our preliminary results related to the in silico design of the influenza B/Yamagata hemagglutinin in a peer-reviewed journal. At present, both protein antigens were already purchased and now available for use in the succeeding year. Similarly, the chosen pneumonia protein antigen (pneumolysin) was successfully design, however, high amounts of pneumolysin is no longer commercially available which is why an alternative pneumonia protein antigen is currently being searched and, subsequetly, designed. Additionally, identifying biochemical networks ideal for assessing CNS demyelination has been established. Considering the complex biochemical networks involved in CNS deamylation, network analysis (using Cytoscape) will be performed was all known biochemical networks are identified. Holistic analyses will be done through centrality measurements in order to identified specific biocehmical components involved.

現在までの達成度 (区分)
現在までの達成度 (区分)

2: おおむね順調に進展している

理由

We successfully designed and produced our target antigen proteins (influenza A and B) in silico. A third protein antigen targeting pneumonia is currently being designed. Moreover, xanthan gel and antigen docking were likewise successfully done. In additiona, we would have established the following: (1) potential B- and T-cell-related epitopes that are exposed after gel-encapsulating target antigens are mainly located in tha HA1 region; (2) optimized conditions for systemic vaccination strategies which in-turn will be used as control; and (3) biochemical networks ideal for assessing CNS demyelination are established, but further analyses is being done using centrality measurements. First year objectives were successfully fulfilled and a paper was successfully accepted for publication in a peer-reviewed journal.

今後の研究の推進方策

Commercially available influenza A H3N2 HA and influenza B HA at varying concentrations will be used for antigen:gel ratio optimization. Industrial-grade xanthum gum will be used as the gel component. Varying mixing options will be considered in order to establish the optimal antigen:gel ratios for all target antigens.

次年度使用額が生じた理由

Savings from the previous year is due to the unavailability of the pneumolysin protein antigen. Nevertheless, commercially available influenza A H3N2 and influenza B/Yamagata HA at high amounts were purchased and will be used for antigen:gel ratio optimization. Industrial-grade xanthum gum is available and will be used as the gel component. For the subsequent year, varying mixing options will be considered in order to establish the optimal antigen:gel ratios for all target antigens. Additionally, sublingual vaccination conditions will be optimized and the proposed CNS demyelination standard through in vitro and in vivo experimentations will be evaluated.

  • 研究成果

    (2件)

すべて 2020 2019

すべて 雑誌論文 (1件) (うち国際共著 1件、 査読あり 1件) 学会発表 (1件) (うち国際学会 1件)

  • [雑誌論文] Structural insights into the potential changes in receptor binding site found in the influenza B Yamagata hemagglutinin: A putative correlation between receptor binding site structural variability and seasonal infection2020

    • 著者名/発表者名
      Marni E.Cueno, Kanako Iguchi, Kanta Suemitsu, Marina Hirano, Kosei Hanzawa, Takemasa Isoda, Miu Ueno, Rinako Iguchi, Aoi Otani, Kenichi Imai
    • 雑誌名

      Journal of Molecular Graphics and Modelling

      巻: 97 ページ: 107580

    • DOI

      10.1016/j.jmgm.2020.107580

    • 査読あり / 国際共著
  • [学会発表] Structural variations in the influenza B hemagglutinin receptor binding site coincide with viral evolution and infection: A computational study with antiviral applications2019

    • 著者名/発表者名
      Marni E. Cueno, Kenichi Imai
    • 学会等名
      27th Intelligent Systems for Molecular Biology and 18th European Conference on Computational Biology
    • 国際学会

URL: 

公開日: 2021-01-27  

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