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Functional analysis of lysophosphatidic acid in urothelial carcinoma and establishment of novel treatment.

Research Project

Project/Area Number 17K16804
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Urology
Research InstitutionFukushima Medical University

Principal Investigator

Kataoka Masao  福島県立医科大学, 医学部, 助教 (90554204)

Research Collaborator Kojima Yoshiyuki  
Ishibashi Kei  
Akaihata Hidenori  
Satoh Yuichi  
Hata Junya  
Koguchi Tomoyuki  
Project Period (FY) 2017-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2017: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords膀胱癌 / リゾフォスファチジン酸 / 遊走 / リゾリン脂質 / 浸潤 / 再発 / 尿路上皮癌
Outline of Final Research Achievements

It was confirmed that lysophosphatidic acid receptor 1 (LPA1) expression is significantly elevated in muscle invasive bladder cancer according to LPA1 expression analysis using a transurethral bladder tumor resection specimen of bladder cancer patients. And the recurrence rate after surgery is significantly higher in LPA1 positive group compared with the LPA1 negative group(p <0.05). The LPA1 positive group was confirmed to have a significantly lower cancer-specific survival rate than the negative group (p <0.05). Analysis using the bladder cancer cell line T24 confirmed that LPA increased invasion ability via LPA1. Furthermore, it was confirmed that LPA affected in the enhancement of Rho / ROCK, the phosphorylation of myosin light chain, and the promotion of the formation of lamellipodia.

Academic Significance and Societal Importance of the Research Achievements

膀胱癌は時間的、空間的な多発性が特徴で、再発率が高いこと、そして再発時に進展する可能性が高いことが問題である。これまでは膀胱癌細胞に対する殺細胞効果を狙った抗がん剤治療が行われてきたが、近年では腫瘍免疫の研究の発展により免疫チェックポイント阻害剤による治療なども行われるようになってきた。しかし、膀胱癌の特徴である尿路内の播種に着目した細胞の遊走、接着に対する研究や創薬研究は十分とは言い難い。本研究は尿中生理活性物質であるリゾフォスファチジン酸や細胞遊走に着目しているところに新規性があり、新規治療標的や新規治療薬開発に役立つ可能性がある。

Report

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

    (2 results)

All 2017

All Presentation (2 results) (of which Int'l Joint Research: 1 results)

  • [Presentation] 膀胱癌におけるリゾフォスファチジン酸受容体1の再発・進展予測因子としての可能性2017

    • Author(s)
      片岡政雄
    • Organizer
      日本癌治療学会学術集会
    • Related Report
      2017 Research-status Report
  • [Presentation] Expression and function of lysophosphatidic acid receptor 1 in bladder cancer2017

    • Author(s)
      Masao Kataoka
    • Organizer
      American urological association anual meeting
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research

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Published: 2017-04-28   Modified: 2020-03-30  

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