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2020 Fiscal Year Final Research Report

Functional analyses of the Ikaros complex in multiple myeloma to identify novel therapeutic targets.

Research Project

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Project/Area Number 19K23895
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0901:Oncology and related fields
Research InstitutionJichi Medical University

Principal Investigator

Osada Naoki  自治医科大学, 医学部, 助教 (60840858)

Project Period (FY) 2019-08-30 – 2021-03-31
Keywords多発性骨髄腫 / 免疫調節薬 / 薬剤耐性 / Ikaros複合体 / 転写制御 / エピジェネティクス / ChIP-Atlas
Outline of Final Research Achievements

Elucidation of the mechanism of resistance acquisition against lenalidomide, a key drug in the treatment of multiple myeloma (MM), is an important issue. In this study, we performed genome-wide screening with ChIP-sequencing and ChIP-Atlas software, and identified 1) multiple factors that could be new downstream targets of Ikaros and 2) the transcription factor Fos as a candidate of transcriptional co-activator of Ikaros. In fact, Fos knockdown reduced the expression of IRF4 and SLAMF7, known targets of Ikaros, in MM cells. These results may provide valuable information for the development of combination therapies that could overcome lenalidomide resistance in MM.

Free Research Field

血液腫瘍学

Academic Significance and Societal Importance of the Research Achievements

多発性骨髄腫の標準治療にlenalidomideは必須の薬剤であり、初発時から再発再燃時まで広く用いられている。このため、lenalidomide耐性は治療上の重要な課題となっており、そのメカニズムの解明はさらなる治療の進歩に不可欠である。本研究は、lenalidomideに対する耐性獲得機序におけるFosの役割を明らかにした初めての報告である。この結果から、Fos発現阻害に働く薬がlenalidomideに対する耐性を解除する可能性が考えられ、臨床的にも大きな意義のある研究内容と言える。

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Published: 2022-01-27  

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