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Mechanism of taste disorder induced by radiotherapy and the process of recovery

Research Project

Project/Area Number 20K18807
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 57080:Social dentistry-related
Research InstitutionHiroshima University

Principal Investigator

KONISHI Masaru  広島大学, 病院(歯), 講師 (60537447)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2023: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords味覚障害 / 放射線治療 / 味覚受容体 / 有害事象
Outline of Research at the Start

口腔癌に対する放射線治療の副作用に味覚障害があるが、その機序に関しては明らかではないことが多く、有効な対処法がないのが現状である。本研究では、放射線治療による味覚障害の本態と回復過程の機序を明らかにすることを目的として、味を受容する味細胞に発現する味覚受容体と味細胞が存在する舌乳頭に着目した。舌癌で組織内照射を受けた患者を対象として、治療の前後で患者の味覚に関する自覚症状と舌乳頭の状態や味覚受容体の発現レベルとの関連性を調べることで味覚障害の本態と回復過程に関連する機序を明らかし、さらに本研究の結果から、放射線治療による味覚障害への対応策についての示唆を得ることができると考えている。

Outline of Final Research Achievements

This research investigated the mechanism of radiation-induced taste disorder and its recovery process in patients undergoing radiotherapy. Based on data from 10 patients who underwent brachytherapy for tongue cancer, the duration of taste recovery after brachytherapy was 284 days for sweet taste, 308 days for umami taste, and 308 days for bitter taste. Regarding taste receptor expression, immediately after brachytherapy, all taste receptors for sweet, umami, and bitter tastes were more highly expressed on the brachytherapy side of the tongue, but thereafter, the difference in taste receptor expression between the radiotherapy and non-radiotherapy sides of the tongue showed a tendency to decrease over time.

Academic Significance and Societal Importance of the Research Achievements

今回の研究では、舌癌に対して小線源治療を受けた患者を対象として、放射線治療による味覚障害についてその発症メカニズムと回復過程について調査を行った。今回の研究結果から放射線治療後、約300日程度で味覚は回復することがわかった。味覚障害について細胞レベルでの調査も行ったが、味覚障害のメカニズムを解明できるだけのデータは得られなかった。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (5 results)

All 2023 2022 2021

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (3 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Subjective and objective assessments of sweet, umami, and bitter tastes after brachytherapy for patients with tongue cancer2023

    • Author(s)
      Konishi Masaru、Shimabukuro Kiichi、Kakimoto Naoya
    • Journal Title

      Oral Science International

      Volume: 21 Issue: 1 Pages: 93-98

    • DOI

      10.1002/osi2.1187

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Subjective and objective assessments of sweet, umami, and bitter tastes after brachytherapy for patients with tongue cancer2023

    • Author(s)
      Masaru Konishi, Kiichi Shimabukuro, Naoya Kakimoto
    • Journal Title

      Oral Science International

      Volume: -

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] Tastes change after administering brachytherapy for tongue cancer patients2022

    • Author(s)
      Masaru Konishi, Kiichi Shimabukuro, Pongsapak Wongratwanich, Naoya Kakimoto
    • Organizer
      The 13th Asian Congress of Oral and Maxillo-facial Radiology
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Tastes change after administering brachytherapy for tongue cancer patients2022

    • Author(s)
      Masaru Konishi, Kiichi Shimabukuro, Pongsapak Wongratwanich, Naoya Kakimoto
    • Organizer
      The 13th Asian Congress of Oral and Maxillo-Facial Radiology
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 舌癌に対する小線源治療後の味覚変化2021

    • Author(s)
      小西勝、澤尻昌彦、Rinus Gerardus Verdonschot、島袋紀一、Pongsapak Wongratwanich、柿本直也
    • Organizer
      日本歯科放射線学会第61回学術大会
    • Related Report
      2021 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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