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Epigenomic analysis of malignant melanoma and examination of biomarkers in immunotherapy

Research Project

Project/Area Number 17K16339
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Dermatology
Research InstitutionKobe University

Principal Investigator

Fujiwara Susumu  神戸大学, 医学研究科, 助教 (40645389)

Research Collaborator NISHIGORI chikako  
NAGAI hiroshi  
JIMBO haruki  
JIMBO naoe  
INOIE masukazu  
TANAKA tomoyo  
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: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords悪性黒色腫 / 色素細胞 / 母斑 / エピジェネティック / メチル化 / NPM2 / 病理 / マーカー / 免疫染色 / 鑑別マーカー / 医療・福祉 / 癌 / マイクロアレイ / 免疫学 / ゲノム
Outline of Final Research Achievements

DNA methylation is considered the primary epigenetic mechanism underlying the development of malignant melanoma. Since DNA methylation can be influenced by environmental factors, it is preferable to compare cancer and normal cells from the same patient. We employed a novel epidermal sheet cultivation technique to isolate normal melanocytes from unaffected sites of melanoma patients. Our analysis discovered methylation at several novel loci (KRTCAP3, AGAP2, ZNF490). Subsequent studies revealed that NPM2 was hypermethylated and downregulated in melanomas. In many normal melanocytes, NPM2 showed distinct immunohistochemical staining, while its expression was lost in malignant melanoma cells. In particular, intraepithelial lesions of malignant melanoma, an important challenge in clinical practice, could be distinguished from benign nevi. NPM2 immunoreactivity could be used to differentiate melanomas from normal melanocytes or benign disease.

Academic Significance and Societal Importance of the Research Achievements

黒色腫と正常色素細胞のメチル化の状態に差異があることは以前から知られていましたが、今回同じ患者さんから得られた黒色腫と色素細胞の解析結果からは新たな発見が多数あり、過去知られていた事実と異なる点も見えてきました。このことからメチル化を研究する場合、同じ患者さんからの細胞を検討することがやはり重要であるといえます。またその解析結果から、悪性黒色腫を診断できる可能性のある新たなマーカーが見つかりました。今後その分子に着目することで悪性黒色腫がどのように発症するのかを検討することが出来ます。さらに新たな治療につながる可能性もあります。

Report

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

    (4 results)

All 2019 2017 Other

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

  • [Journal Article] Gene Expression and Methylation Analysis in Melanomas and Melanocytes From the Same Patient: Loss of NPM2 Expression Is a Potential Immunohistochemical Marker for Melanoma2019

    • Author(s)
      Fujiwara Susumu、Nagai Hiroshi、Jimbo Haruki、Jimbo Naoe、Tanaka Tomoyo、Inoie Masukazu、Nishigori Chikako
    • Journal Title

      Frontiers in Oncology

      Volume: 8 Pages: 675-675

    • DOI

      10.3389/fonc.2018.00675

    • NAID

      120006552894

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Genome-wide DNA methylation analysis in melanocytes and melanomas from the sama individual.2017

    • Author(s)
      Susumu Fujiwara, Hiroshi Nagai, Haruki Jinbo, Tomoyo Tanaka, Masugazu Inoue, Chikako Nishigori
    • Organizer
      International Pigment Cell Conference 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Remarks] 神戸大学皮膚科ホームページ

    • URL

      http://www.med.kobe-u.ac.jp/dermat/touka/jisseki/index.html

    • Related Report
      2018 Annual Research Report
  • [Remarks] 神戸大学皮膚科学教室ホームページ

    • URL

      http://www.med.kobe-u.ac.jp/dermat/touka/jisseki/index.html

    • Related Report
      2017 Research-status Report

URL: 

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

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