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Treatment Strategies for DUSP6 Inactivated Pancreatic Cancer

Research Project

Project/Area Number 20K07386
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 49020:Human pathology-related
Research InstitutionTohoku University

Principal Investigator

Saiki Yuriko  東北大学, 医学系研究科, 准教授 (80311223)

Co-Investigator(Kenkyū-buntansha) 古川 徹  東北大学, 医学系研究科, 教授 (30282122)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywordspancreatic cancer / Dusp6 / ERK / 腫瘍抑制因子 / 膵がん / マウスモデル / 膵臓がん / 発がんモデルマウス / 膵がんマウスモデル / DUSP6 / モデルマウス
Outline of Research at the Start

Dual specificity phosphatase 6 (DUSP6)は、ヒト膵臓がんで高頻度(40-50%)に不活化している。DUSP6はMAPK経路を負に制御しており、その不活化はMAPK経路の高活性化をおこす。膵臓の前癌病変ではDUSP6は発現しているが、浸潤部で発現が低下している。この事実は、前癌病変から浸潤がんへの進展の過程で、DUSP6が腫瘍抑制因子としてはたらく可能性を示唆している。本研究では、Dusp6 nullの膵臓がんモデルマウスを作製し、Dusp6の腫瘍抑制因子としてのはたらきを個体レベルで明らかにする。さらに、DUSP6不活化膵臓がんに対する新規の治療を提案する。

Outline of Final Research Achievements

Dual-specificity phosphatase 6 (DUSP6) is an ERK-specific phosphatase and acts as a negative feedback regulator of ERK activity. In human pancreas, DUSP6 expression increases in Pan-IN lesions, but decreases in invasive lesions. In this study, we use Dusp6 knockout mice to explore the role of Dusp6 in KrasG12D-driven pancreatic carcinogenesis.
We crossed Pdx1-Cre; KrasLSL-G12D (KC) mice and Dusp6 knockout mice to generate Pdx1-Cre; KrasLSL-G12D; Dusp6 -/- mice. To study the effects of deleting Dusp6 on pancreatic carcinogenesis, we generated aged-matched cohorts of KC mice, which were wild, heterozygous or homozygous for the knockout allele of Dusp6. Histological analysis revealed significantly increased acinar to ductal metaplasia (ADM) and PanIN lesions in mice lacking Dusp6 compared with KrasG12D expression alone. Our data suggest a tumor suppressive role of Dusp6 in pancreatic carcinogenesis.

Academic Significance and Societal Importance of the Research Achievements

現在までに10種類のdual-specificity phosphatase が知られているが、DUSP6はその中でERK特異的な脱リン酸化酵素として最も早く同定された。はじめに、DUSP6が膵臓がんにおいて腫瘍抑制因子としてはたらく可能性が見いだされ、それにつづいて、卵巣がん,肺がんでもDUSP6の機能喪失性異常が報告されている。しかし、DUSP6の不活化により発癌がうながされることを、個体レベルで証明した報告はない。本研究は、世界に先駆けて生体内でのDUSP6の腫瘍抑制因子としての働きを明らかにした。

Report

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

    (3 results)

All 2022 2021

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

  • [Journal Article] Genetic Mutations of Pancreatic Cancer and Genetically Engineered Mouse Models2021

    • Author(s)
      Saiki Yuriko、Jiang Can、Ohmuraya Masaki、Furukawa Toru
    • Journal Title

      Cancers

      Volume: 14 Issue: 1 Pages: 71-71

    • DOI

      10.3390/cancers14010071

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 17)Loss of Dusp6 enhance the KrasG12D-driven pancreatic carcinogenesis2022

    • Author(s)
      Akiyuki Sasaki,Yuriko Saiki, Jiang Can, Toru Furukawa
    • Organizer
      JCA-AACR Conference on Advances in Pancreatic Cancer Research
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 16)Dual specificity phosphatase 6 deficiency improves insulin sensitivity and protects against obesity in mice2022

    • Author(s)
      Can Jiang, Yuriko Saiki, Toru Furukawa.
    • Organizer
      International Association of Pancreatology and Japan Pancreas Society Meeting
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research

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Published: 2020-04-28   Modified: 2024-01-30  

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