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

Enrichment technique to allow early detection and monitor emergence of KRAS mutation in response to treatment

Research Project

Project/Area Number 19K17508
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 53010:Gastroenterology-related
Research InstitutionChiba Cancer Center (Research Institute)

Principal Investigator

Kitagawa Yoshiyasu  千葉県がんセンター(研究所), 内視鏡科, 医長 (10838577)

Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
KeywordsctDNA / PIポリアミド / 大腸がん / 膵臓がん / KRAS / リッキドバイオプシー / トランスレーショナルリサーチ / 腫瘍由来循環腫瘍DNA / デジタルPCR
Outline of Research at the Start

近年、血液中の循環腫瘍DNA(ctDNA)を用いたがんのクリニカルシークエンスが注目されている。しかし、無細胞遊離DNA (cfDNA)中のctDNAは存在比が微量であるため、ctDNA解析の早期診断への応用は困難とされている。我々は、標的遺伝子のDNA配列に特異的に結合する化合物複合体を用いることで、血液中に存在する微量ctDNAを濃縮する技術を開発した。本研究において、この濃縮法の臨床的有用性を検証する。

Outline of Final Research Achievements

We developed an enrichment method utilizing pyrrole-imidazole (PI) polyamides and their ability to bind the minor groove of B-DnA. In this study, we investigated the clinical feasibility of incorporating PI polyamides to detect KRAS mutations in ctDNA from pancreatic cancer patients. <Study 1> After enrichment, we performed ctDNA analysis in 14 pancreatic cancer patients with KRAS mutations who underwent surgery at our hospital, but ctDNA was not detected. <Study 2> We performed ctDNA analysis in 21 pancreatic cancer patients and 21 healthy volunteer. After enrichment, no significant difference was observed in the copy number of ctDNA (KRAS G12) between pancreatic cancer patients and healthy volunteer. Therefore, this enrichment technique might be not suitable as a marker for early diagnosis of pancreatic cancer.

Academic Significance and Societal Importance of the Research Achievements

我々は、血液中を循環している微量な腫瘍由来DNA(ctDNA)を濃縮する技術を開発した。本研究では、この濃縮法を用いたctDNA解析が膵臓がん患者の早期発見に役立つか検討を行った。当センターで外科手術を受けたステージⅠ~Ⅲの膵臓がん患者を対象とし、手術前に採取された保存血清を用いて、ctDNA解析を行った。濃縮後にデジタルPCRでctDNAの測定を行ったが、ctDNAは検出されなかった。この濃縮法によるctDNA解析は、膵臓がんの早期発見に寄与しない可能性が示唆された。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (17 results)

All 2023 2022 2021 2020 2019

All Journal Article (6 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 6 results,  Open Access: 5 results) Presentation (10 results) (of which Int'l Joint Research: 1 results) Book (1 results)

  • [Journal Article] Randomized study of two endo-knives for the traction-assisted endoscopic submucosal dissection of early esophageal squamous cell carcinoma2022

    • Author(s)
      Kitagawa Yoshiyasu、Ishigaki Asuka、Nishii Rino、Sugita Osamu、Suzuki Takuto
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 4619-4619

    • DOI

      10.1038/s41598-022-08348-0

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Endoscopic submucosal dissection by transnasal endoscope for esophageal cancer with pharyngoesophageal anastomotic stricture after total pharyngo-laryngo-esophagectomy2020

    • Author(s)
      Kitagawa Yoshiyasu、Suzuki Takuto、Nakamura Kentaro、Nankinzan Rino、Yamaguchi Taketo
    • Journal Title

      Endoscopy

      Volume: 52 Issue: 12 Pages: E445-E447

    • DOI

      10.1055/a-1158-8948

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Usefulness of cold polypectomy under linked color imaging.2020

    • Author(s)
      Suzuki T, Kitagawa Y, Nankinzan R, Yamaguchi T.
    • Journal Title

      Endosc Int Open.

      Volume: 08 Issue: 01 Pages: E87-E91

    • DOI

      10.1055/a-1035-9411

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Comparison of endoscopic visibility and miss rate for early gastric cancers after Helicobacter pylori eradication with white-light imaging versus linked color imaging.2019

    • Author(s)
      Kitagawa Y, Suzuki T, Nankinzan R, Ishigaki A, Furukawa K, Sugita O, Hara T, Yamaguchi T.
    • Journal Title

      Dig Endosc.

      Volume: - Issue: 5 Pages: 769-777

    • DOI

      10.1111/den.13585

    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Enrichment technique to allow early detection and monitor emergence of KRAS mutation in response to treatment.2019

    • Author(s)
      Kitagawa Y, Okumura K, Watanabe T, Tsukamoto K, Kitano S, Nankinzan R, Suzuki T, Hara T, Soda H, Denda T, Yamaguchi T, Nagase H.
    • Journal Title

      Sci Rep.

      Volume: 9 Issue: 1 Pages: 11346-11346

    • DOI

      10.1038/s41598-019-47700-9

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Endoscopic submucosal dissection for superficial esophageal cancer overlying a submucosal tumor originating from the muscularis propria.2019

    • Author(s)
      Nankinzan R, Suzuki T, Kitagawa Y, Yamaguchi T.
    • Journal Title

      Endoscopy.

      Volume: 51 Issue: 12 Pages: E358-E359

    • DOI

      10.1055/a-0919-4278

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Cell-free DNA bearing mutated KRAS gene is an unsuitable genetic marker for the early diagnosis of pancreatic cancer2023

    • Author(s)
      下里修
    • Organizer
      日本癌学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 糸付きクリップ法を併用した食道 ESD における高周波ナイフの無作為化比較試験2021

    • Author(s)
      北川善康,西井理乃,鈴木拓人
    • Organizer
      第101回日本消化器内視鏡学会総会
    • Related Report
      2021 Research-status Report
  • [Presentation] H. pylori感染胃炎の内視鏡的診断におけるTexture and Color Enhancement Imagingの有用性2021

    • Author(s)
      北川善康,古賀邦林,石垣飛鳥,杉田統,鈴木拓人
    • Organizer
      JDDW2021
    • Related Report
      2021 Research-status Report
  • [Presentation] RANDOMIZED STUDY OF TWO ENDO-KNIVES FOR THE TRACTION-ASSISTED ENDOSCOPIC SUBMUCOSAL DISSECTION OF ESOPHAGEAL CANCER2021

    • Author(s)
      Y.Kitagawa
    • Organizer
      DDW2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Helicobacter pylori /除菌後胃癌に対するBLIおよびChromo-LCI拡大内視鏡の有用性2020

    • Author(s)
      北川善康
    • Organizer
      第99回日本消化器内視鏡学会総会
    • Related Report
      2020 Research-status Report
  • [Presentation] H. pylori除菌後胃癌の範囲診断におけるNBI・BLI併用拡大内視鏡の有用性~現感染例との比較~2020

    • Author(s)
      北川善康
    • Organizer
      JDDW2020年
    • Related Report
      2020 Research-status Report
  • [Presentation] H. pylori除菌後胃癌の発見率向上に向けたlinked color imagingの有用性2019

    • Author(s)
      北川善康,鈴木拓人,山口武人
    • Organizer
      第97日本消化内視鏡学会総会
    • Related Report
      2019 Research-status Report
  • [Presentation] H. pylori 除菌後胃癌の発見率向上に向けたlinked color imagingの有用性2019

    • Author(s)
      北川善康,南金山理乃,鈴木拓人,山口武人
    • Organizer
      第108回日本消化器内視鏡学会関東支部例会
    • Related Report
      2019 Research-status Report
  • [Presentation] H. pylori 除菌後胃癌の見落とし率低下に向けたlinked color imagingの有用性2019

    • Author(s)
      北川善康,石垣飛鳥,古川潔人,南金山理乃,杉田統,鈴木拓人,山口武人
    • Organizer
      Japan Digestive Disease Week 2019
    • Related Report
      2019 Research-status Report
  • [Presentation] H. pylori 除菌後胃癌の見落とし率低減に向けたlinked color imagingの有用性2019

    • Author(s)
      北川善康,鈴木拓人.南金山理乃,山口武人
    • Organizer
      第109回日本消化器内視鏡学会関東支部例会
    • Related Report
      2019 Research-status Report
  • [Book] 【ピロリ菌未感染および除菌後の早期胃癌の診断】除菌後胃癌の見落とし率低減に向けたLCIの有用性について(解説/特集)2020

    • Author(s)
      北川 善康
    • Publisher
      消化器内科
    • Related Report
      2020 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi