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A novel therapeutic strategy for malignant tumors by regulating the influx of extracellular Arachidonic acid

Research Project

Project/Area Number 22K20838
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0901:Oncology and related fields
Research InstitutionThe Institute for AIM Medicine (2023)
Tokai University (2022)

Principal Investigator

Kudo Kai  一般社団法人AIM医学研究所, 研究部門, リサーチフェロー (60967165)

Project Period (FY) 2022-08-31 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords脂質代謝 / 過酸化脂質 / Ferroptosis / 悪性リンパ腫 / がん
Outline of Research at the Start

腫瘍細胞は細胞内外の複雑な脂質の流れ・組成を統御することが知られているが、その分子機序や機能の詳細は不明である。これまでの研究成果より一部の悪性リンパ腫細胞においては、細胞外脂質の輸送体タンパク「FATP2」の発現が減少し、これによって膜の脂質過酸化が原因となって誘導される細胞死「Ferroptosis」への耐性を獲得し腫瘍の生存を促していることが明らかとなった。本研究ではこのFATP2発現調節機構の解明と、腫瘍細胞の脂質組成制御の破綻による新規治療戦略基盤の創出を目指す。

Outline of Final Research Achievements

Tumor cells are known to regulate intracellular and extracellular lipid composition to create a microenvironment favorable for their own survival, but the details of the molecular mechanisms and biological significance of this regulation are unknown. In this study, we found that tumor cells acquire resistance to ferroptosis and promote tumor growth by decreasing intracellular AA levels by regulating the expression of FATP2, a transporter of arachidonic acid (AA), a proinflammatory lipid. Public database analysis of TCGA and xenograft models revealed that the above-mentioned regulatory mechanism of extracellular lipid influx also plays an important role in tumor growth in poor prognosis cancers such as glioblastoma and melanoma.

Academic Significance and Societal Importance of the Research Achievements

本研究で明らかとなった悪性腫瘍の持つ脂質制御機構の一つであるFATP2の発現量は、リンパ腫のみならず多くのがんにおける予後予測マーカーとなり得る可能性が示された。今後は悪性腫瘍や過活動状態の免疫細胞を標的とした本分子の発現誘導法やリポソームを用いたアラキドン酸輸送法の検討を通じて、より副作用の少ない新規治療戦略の開発へと繋がることが期待される。

Report

(3 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • Research Products

    (2 results)

All 2024 2022

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (1 results)

  • [Journal Article] Unique lipid composition maintained by extracellular blockade leads to prooncogenicity2024

    • Author(s)
      Kai Kudo, Ryo Yanagiya, Masanori Hasegawa, Joaquim Carreras, Yoshimi Miki, Shunya Nakayama, Etsuko Nagashima, Yuji Miyatake, Kan Torii, Kiyoshi Ando, Naoya Nakamura, Akira Miyajima, Makoto Murakami, Ai Kotani
    • Journal Title

      Cell Death Discovery

      Volume: 10 Issue: 1 Pages: 221-231

    • DOI

      10.1038/s41420-024-01971-y

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] FATP2を介したアラキドン酸(AA)の流入制御は悪性リンパ腫におけるフェロトーシス抵抗性を誘導する2022

    • Author(s)
      工藤 海、長谷川 政徳、三木 寿美、村上 誠、幸谷 愛
    • Organizer
      第84回日本血液学会学術集会
    • Related Report
      2022 Research-status Report

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Published: 2022-09-01   Modified: 2025-01-30  

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