• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Effects of novel anti-ASCT2 monoclonal antibody on human tumor harboring KRAS mutation

Research Project

Project/Area Number 19K16876
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 50020:Tumor diagnostics and therapeutics-related
Research InstitutionKindai University

Principal Investigator

Hara Yuta  近畿大学, 薬学部, 助教 (20803779)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2019: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
KeywordsASCT2 / KRAS / 大腸癌 / モノクローナル抗体
Outline of Research at the Start

近年、分子標的治療薬、さらに癌免疫療法の開発により、癌治療の発展は目覚ましいが、未だ治療法が無い難治性の癌も存在する。その中の1つに、KRAS遺伝子が変異した癌がある。本遺伝子の変異は、大腸癌や膵癌、肺癌など種々の癌種で報告されている。本研究では、我々が独自に作製したグルタミントランスポーターASCT2に対するモノクローナル抗体を用い、KRAS遺伝子の変異した癌に対してASCT2が治療標的として有効であるか検討する。

Outline of Final Research Achievements

Mutations in KRAS are detected in various human cancers. However, there are few effective drugs for KRAS-mutated cancers. Glutamine is thought to be one of the pivotal nutrients for proliferation and survival of cancer cells. ASCT2 (SLC1A5) is a multi-pass transmembrane protein that transports neutral amino acids. ASCT2 is reported to be highly expressed in many cancer cells, and is thought to work as a major transporter for glutamine. We have developed a novel monoclonal antibody (mAb) against the extracellular domain of human ASCT2. In the present study, we examined the effects of the mAb on KRAS-mutated colorectal cancer cells. Treatment with anti-ASCT2 mAb decreased the concentration of intracellular glutamine and in vivo tumor growth. However, these effects were not observed in colorectal cancer cells which harbor wild-type KRAS. These results suggest that ASCT2 is a promising therapeutic target for KRAS-mutated cancers.

Academic Significance and Societal Importance of the Research Achievements

KRAS遺伝子は、多くのがんで変異が認められる。分子標的治療薬の登場により、がん治療は格段に進歩したが、未だKRAS遺伝子に変異のあるがんに対しては治療法が存在しない。また、KRAS遺伝子が変異した大腸癌以外のがん種においても、その生存・増殖がグルタミン代謝に非常に強く依存していることが知られている。したがって、本研究で見出したASCT2の阻害によるグルタミン取込みの抑制がKRAS遺伝子変異の大腸癌の増殖を阻害するという知見は、KRAS遺伝子に変異のある様々ながん種に対する治療戦略の開発に貢献出来ると考えている。

Report

(3 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (4 results)

All 2019

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (3 results)

  • [Journal Article] Anti‐tumor effects of an antagonistic mAb against the ASCT2 amino acid transporter on KRAS‐mutated human colorectal cancer cells2019

    • Author(s)
      Yuta Hara, Yushi Minami, Soshi Yoshimoto, Natsumi Hayashi, Akitaka Yamasaki, Shiho Ueda, Kazue Masuko, Takashi Masuko
    • Journal Title

      Cancer Medicine

      Volume: 9 Issue: 1 Pages: 302-312

    • DOI

      10.1002/cam4.2689

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Anti-cancer effectsand internalization activity of novel anti-ASCT2 mAb on humna colorectal and pancreatic cancers2019

    • Author(s)
      Soshi Yoshimoto, Yuta Hara, Toshiyuki, Ishiwata, Takashi Masuko
    • Organizer
      The 78th Annual Meeting of the Japanese Cancer Association
    • Related Report
      2019 Research-status Report
  • [Presentation] Anti-cancer antibody therapy targeting CAT1/SLC7A12019

    • Author(s)
      Hiroshi Okura, Takashi Masuko, Yuta Hara
    • Organizer
      The 78th Annual Meeting of the Japanese Cancer Association
    • Related Report
      2019 Research-status Report
  • [Presentation] Characterization of HER3/MET-KO human colon cancer cells2019

    • Author(s)
      Rikuto Miyake, Akitaka Yamasaki, Yuta Hara, Yoshiya Ono, Takashi Masuko
    • Organizer
      The 78th Annual Meeting of the Japanese Cancer Association
    • Related Report
      2019 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2022-01-27  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi