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Inhibition of the MITF transcriptional activity by histone deacetylase 4 through SUMOylation

Research Project

Project/Area Number 18K07031
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 InstitutionAichi Medical University

Principal Investigator

MURAKAMI HIDEKI  愛知医科大学, 医学部, 教授 (90303619)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywordsメラノーマ / MITF / SUMO化 / SUMO / HDAC4 / 悪性黒色腫
Outline of Final Research Achievements

The MITF is a lineage-specific oncogene in melanoma. The transcriptional activity of the MITF is regulated by post-translational modifications, including phosphorylation, ubiquitination and SUMOylation. In this study, we show that HDAC4 represses the transcriptional activity of the MITF through enhanced SUMOylation. Expression of HDAC4 was correlated with SUMOylation of MITF in melanoma specimens and cell lines. Activation of calcium/calmodulin-dependent protein kinase (CaMK) signaling promoted disrupting MITF-HDAC4 complexes and stimulating HDAC4 nuclear export. The upregulation of MITF sumoylation via the use of inhibitors of CaMK pathway could represent a valid anti-melanoma strategy.

Academic Significance and Societal Importance of the Research Achievements

悪性黒色腫は悪性度の高い皮膚腫瘍で、転移した場合は予後は極めて不良である。根治切除不能のメラノーマの対してはBRAFおよびMEK阻害剤などの有効性が確認されているが、薬剤耐性などにより持続的な効果が得られないことがある。BFAF阻害に対する耐性機構の一つとして転写因子MITF遺伝子の増幅などによる活性化が関与している。本研究ではHDAC4がMITFのSUMO化を促進することにより活性化に抑制的に働くことを明らかにした。HDAC4はCaMKによるリン酸化により局在が制御されており、CaMK阻害によるHDACを介したMITFの活性制御がBRAF阻害剤耐性に有効である可能性が示唆された。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (2 results)

All 2020 2019

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

  • [Journal Article] Identification of CD24 as a potential diagnostic and therapeutic target for malignant pleural mesothelioma2020

    • Author(s)
      KarnanS, Ota A, Murakami H, Rahman ML, Hasan  MN, Wahiduzzaman MD, Hanamura I, Vu LQ, Inoko A, Hyodo T, Konishi H, Tsuzuki S, Hosokawa Y.
    • Journal Title

      Cell Death Discovery

      Volume: 18 Issue: 1 Pages: 127-139

    • DOI

      10.1038/s41420-020-00364-1

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Establishment and characterization of CRISPR/Cas9-mediated NF2-/- human mesothelial cell line: Molecular insight into FGFR2 in MPM.2019

    • Author(s)
      Wahiduzzaman M, Karnan S, Ota A, Hanamura I, Murakami H, Inoko A, Rahman ML, Hyodo T, Konishi H, Tsuzuki S, Hosokawa Y.
    • Journal Title

      Cancer Science

      Volume: 110 Pages: 180-193

    • Related Report
      2019 Research-status Report
    • Peer Reviewed

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Published: 2018-04-23   Modified: 2022-01-27  

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