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Functional analysis of DDX41 for the construction of new therapeutic strategies in the era of renal cancer immunotherapy.

Research Project

Project/Area Number 20K18143
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 56030:Urology-related
Research InstitutionHiroshima University

Principal Investigator

Hieda Keisuke  広島大学, 病院(医), 講師 (60625630)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2023: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2022: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2021: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords腎細胞癌 / DDX41 / ケモカイン / 予後予測因子 / 腎細胞がん / 淡明細胞型腎細胞癌 / DDX41 / 抗PD-1抗体 / STNG経路
Outline of Research at the Start

本研究の目的は、腎細胞癌におけるDDX41の発現亢進の、(1)抗PD-1抗体の効果予測因子としての有用性(2) STING経路の賦活化を介した悪性度との関連について検証する事である。そのために、ヒト臨床検体(腎摘または生検標本)を用いた解析、ヒト腎細胞癌細胞株を用いたDDX41発現株作製実験、それを用いた分子標的薬・I-O drugに対する感受性検証実験などを行う。

Outline of Final Research Achievements

It is known that the presence of tumor necrosis within renal cell carcinoma is associated with a higher malignancy. However, the underlying mechanisms have not been well understood. Our group hypothesized that the expression of a protein called DDX41, which detects intracellular DNA degraded by tumor necrosis, might be related to cancer malignancy. Using tissue samples from patients who underwent surgery for renal cell carcinoma, we evaluated the expression levels of DDX41. We found that higher expression levels of DDX41 were associated with increased recurrence rates and poorer survival outcomes.

Academic Significance and Societal Importance of the Research Achievements

これまで、腎細胞癌における腫瘍壊死が、なぜ悪性度や予後増悪に関与するのか未知の点が多かった。我々は、腫瘍壊死により放出される分解されたdsDNAをDDX41が感知して発現が上昇し、間接的に予後増悪に寄与すると考えた。本研究は、腎細胞癌のうち最も頻度の高い淡明細胞型腎細胞癌において、DDX41 の発現が腫瘍壊死や生命予後と有意に関係している事を初めて明らかにした。淡明細胞型腎細胞癌はVHL機能欠失型変異を特徴とするが、VHL欠失下においてのみ、DDX41の発現上昇はケモカインファミリーの発現亢進や腫瘍増殖に寄与する事が判明した。DDX41の高発現は、淡明細胞型腎細胞癌の予後予測因子となる。

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

    (3 results)

All 2022 2020

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

  • [Journal Article] DDX41 expression is associated with tumor necrosis in clear cell renal cell carcinoma and in cooperation with VHL loss leads to worse prognosis2022

    • Author(s)
      Kobatake Kohei、Ikeda Kenichiro、Nakata Yuichiro、Yamasaki Norimasa、Kanai Akinori、Sekino Yohei、Takemoto Kenshiro、Fukushima Takafumi、Babasaki Takashi、Kitano Hiroyuki、Goto Keisuke、Hayashi Tetsutaro、Sentani Kazuhiro、Teishima Jun、Kaminuima Osamu、Hinata Nobuyuki
    • Journal Title

      Urologic Oncology: Seminars and Original Investigations

      Volume: 40 Issue: 10 Pages: 456.e9-456.e18

    • DOI

      10.1016/j.urolonc.2022.07.001

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] DDX41 expression causes deregulation of cell cycle and worse prognosis in patients with clear cell renal cell carcinoma2020

    • Author(s)
      小畠浩平
    • Organizer
      第79回日本癌学会学術総会
    • Related Report
      2020 Research-status Report
  • [Presentation] DDX41発現亢進は淡明細胞型腎細胞癌における予後不良因子である2020

    • Author(s)
      小畠浩平
    • Organizer
      第72回西日本泌尿器科学会総会
    • Related Report
      2020 Research-status Report

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

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