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Development of new methods for measuring ion concentrations in interstitial fluid using optical spectroscopy

Research Project

Project/Area Number 16K18990
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field General physiology
Research InstitutionKanazawa University (2018)
Kyoto Prefectural University of Medicine (2016-2017)

Principal Investigator

Puppulin Leonardo  金沢大学, ナノ生命科学研究所, 特任助教 (40771580)

Research Collaborator Hosogi Shigekuni  
Sun Hongxin  
Matsuo Kazuhiko  
Marunaka Yoshinori  
Inui Toshio  
Tanaka Hideo  
Kumamoto Yasuaki  
Suzaki Toshinobu  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2017: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
KeywordsRaman spectroscopy / pH / interstitial fluid / gold nanoparticles / Gold nanoparticles / Cancer cell / 表面強調ラマン分光法 / ラマン分光 / 間質液 / HC03-濃度 / グルコース / タンパク質 / 糖尿病 / アルツハイマー型認知症 / MRI / 間質液pH
Outline of Final Research Achievements

We exploited the remarkable optical properties of gold nanoparticles and their ability to conjugate with different thiol-containing molecular compounds to develop a method for highly localized pH bio-sensing using Raman spectroscopy. The strategy for gold nanoparticles conjugation was specifically designed to efficiently target the cell membrane proteins and to quantify the local pH by collecting the Raman scattering of the 4-MBA monolayer assembled on the gold surface. Experiments on HepG2 human liver cancer cells and MKN28 gastric cancer cells proved the successful anchoring of the gold nanoparticles to the outer cell membrane and showed substantial acidification of the extracellular surface pH. The proposed method of analysis can be used as a simple and viable tool to investigate and unfold the dynamics of proton exchange in cells, even after exposure to different pharmacological treatments or different physiological conditions.

Academic Significance and Societal Importance of the Research Achievements

Dysregulated pH is a common characteristic of cancer cells compared with normal cells. The precise measurement of extracellular pH on the cell membrane using Raman spectroscopy can be used in the future to characterize primary and metastatic cancer cell populations and minimal residual disease.

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (6 results)

All 2019 2018 2017 2016

All Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Open Access: 3 results,  Acknowledgement Compliant: 1 results) Presentation (3 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Bioconjugation strategy for cell surface labelling with gold nanostructures designed for highly localized pH measurement.2018

    • Author(s)
      Leonardo Puppulin, Shigekuni Hosogi, Hongxin Sun, Kazuhiko Matsuo, Toshio Inui, Yasuaki Kumamoto, Toshinobu Suzaki, Hideo Tanaka and Yoshinori Marunaka
    • Journal Title

      Nature Communications

      Volume: 9 Issue: 1 Pages: 5278-5278

    • DOI

      10.1038/s41467-018-07726-5

    • NAID

      120006549200

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Raman micro-spectroscopy as a viable tool to monitor and estimate the ionic transport in epithelial cells2017

    • Author(s)
      Puppulin P, Pezzotti G, Sun H, Hosogi S, Nakahari T, Inui T, Kumamoto Y, Tanaka H, Marunaka Y
    • Journal Title

      Scientific Reports

      Volume: 印刷中

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Validation of a protocol based on Raman and Infrared spectroscopies to nondestructively estimate the oxidative degradation of UHMWPE used in total joint arthroplasty2016

    • Author(s)
      Puppulin L, Miura Y, Casagrande E, Hasegawa M, MARUNAKA Y, Tone S, Sudo A, Pezzotti G
    • Journal Title

      Acta Biomaterialia

      Volume: 38 Pages: 167-178

    • DOI

      10.1016/j.actbio.2016.04.040

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] Highly localized pH sensing on the outer membrane of cells using surface enhanced Raman spectroscopy2019

    • Author(s)
      Puppulin Leonardo
    • Organizer
      Federation of the Asian and Oceanian Physiological Societies Congress
    • Related Report
      2018 Annual Research Report
  • [Presentation] Raman spectroscopy as a viable tool to monitor the effect of aldosterone on A6 renal epithelial cell2017

    • Author(s)
      Puppulin L, Pezzotti G, Sun H, Hosogi S, Nakahari T, Kumamoto Y, Tanaka H, Marunaka Y
    • Organizer
      第94回日本生理学会大会
    • Place of Presentation
      アクトシティ浜松(静岡県・浜松市)
    • Year and Date
      2017-03-28
    • Related Report
      2016 Research-status Report
  • [Presentation] New method based on Raman spectroscopy to detect in-situ concentration of HCO3-, Na+ and K+ from physiologically relevant solutions2016

    • Author(s)
      Puppulin L , Pezzotti G, Hosogi S, Nakahari T, Marunaka Y
    • Organizer
      International Symposium on Ion Channels, Transporters and Signal Transduction
    • Place of Presentation
      京都ホテル(京都府・京都市)
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research

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Published: 2016-04-21   Modified: 2020-03-30  

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