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A Novel Method for Measuring Unbound Serum Bilirubin Levels Using Glucose Oxidase-Peroxidase and Bilirubin-Inducible Fluorescent Protein

Research Project

Project/Area Number 15K19652
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Embryonic/Neonatal medicine
Research InstitutionKobe University

Principal Investigator

Iwatani Sota  神戸大学, 医学部附属病院, 助教 (00741430)

Co-Investigator(Renkei-kenkyūsha) NAKAMUTA Hajime  神戸大学, 大学院医学研究科・内科系講座小児科学分野, 名誉教授 (40030978)
MORIOKA Ichiro  神戸大学, 大学院医学研究科・内科系講座こども急性疾患学, 特命教授 (80437467)
Project Period (FY) 2015-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsunconjugated bilirubin / unbound bilirubin / measurement method / fluorescent protein / UnaG / bilirubin / fluorescent
Outline of Final Research Achievements

Increased serum levels of unconjugated bilirubin (UCB), especially in unbound bilirubin (UB), are associated with the development of brain damage in newborns. In current clinical settings, there are no standard methods for serum levels of UCB and UB. UnaG, a fluorescent protein from Japanese eel muscle that specifically binds to UCB was used in this study. UCB levels measured by the UnaG method were highly correlated with those determined by conventional bilirubin oxidase assay. The performance of the UnaG assay was unaffected by phototherapy and the presence of serum conjugated bilirubin or hemoglobin. These results demonstrate the clinical applicability of the UnaG method for measurement of UCB levels in newborn serum. To date, we have established a novel method for measuring UB levels using glucose oxidase-peroxidase and the UnaG assay (Patent PCT/JP2015/074542).

Report

(3 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • Research Products

    (7 results)

All 2016 2015 Other

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results,  Acknowledgement Compliant: 1 results) Presentation (4 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results) Remarks (1 results) Patent(Industrial Property Rights) (1 results) (of which Overseas: 1 results)

  • [Journal Article] Fluorescent protein-based detection of unconjugated bilirubin in newborn serum2016

    • Author(s)
      Sota Iwatani, Hajime Nakamura, Daisuke Kurokawa, Keiji Yamana, Kosuke Nishida, Sachiyo Fukushima, Tsubasa Koda, Noriyuki Nishimura, Hisahide Nishio, Kazumoto Iijima, Atsushi Miyawaki, Ichiro Morioka
    • Journal Title

      Scientific Reports

      Volume: 6 Issue: 1 Pages: 1-8

    • DOI

      10.1038/srep28489

    • NAID

      120005819328

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Presentation] ここまで来た、臨床応用を視野に入れたUnaGによるビリルビン測定研究2016

    • Author(s)
      岩谷 壮太
    • Organizer
      黄疸管理研究会
    • Place of Presentation
      大阪
    • Year and Date
      2016-10-03
    • Related Report
      2015 Research-status Report
    • Invited
  • [Presentation] 12.ビリルビン誘導蛍光タンパク質(UnaG)を用いた新たな新生児血清中の非抱合型ビリルビン濃度測定法2016

    • Author(s)
      岩谷 壮太
    • Organizer
      日本周産期新生児学会
    • Place of Presentation
      福岡
    • Year and Date
      2016-07-10
    • Related Report
      2015 Research-status Report
  • [Presentation] A Novel Method for Measuring Unbound Serum Bilirubin Levels Using Glucose Oxidase-Peroxidase and Bilirubin-Inducible Fluorescent Protein2016

    • Author(s)
      Sota Iwatani
    • Organizer
      Pediatric Academic Society Meeting
    • Place of Presentation
      Baltimore
    • Year and Date
      2016-04-30
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A novel measurement method for serum unconjugated bilirubin concentrations using a bilirubin-inducible fluorescent protein2015

    • Author(s)
      Sota Iwatani
    • Organizer
      Pediatric Academic Society Meeting
    • Place of Presentation
      SanDiego
    • Year and Date
      2015-04-25
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Remarks] ニホンウナギの光るたんぱく質UnaGによるビリルビン測定-赤ちゃんの黄疸管理の改善へ

    • URL

      http://www.kobe-u.ac.jp/NEWS/research/2016_06_21_02.html

    • Related Report
      2016 Annual Research Report
  • [Patent(Industrial Property Rights)] 血液試料中のアンバウンドビリルビンの測定方法2016

    • Inventor(s)
      岩谷 壮太
    • Industrial Property Rights Holder
      岩谷 壮太
    • Industrial Property Rights Type
      特許
    • Filing Date
      2016-03-30
    • Related Report
      2015 Research-status Report
    • Overseas

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Published: 2015-04-16   Modified: 2018-03-22  

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