Pathogenic mechanisms of Cushing disease caused by gain-of-function USP8 mutations
Project/Area Number |
15H04293
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Tumor biology
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Research Institution | Tokyo Institute of Technology |
Principal Investigator |
Komada Masayuki 東京工業大学, 科学技術創成研究院, 教授 (10225568)
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Research Collaborator |
Fukushima Toshiaki
Endo Akinori
Kawaguchi Kohei
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Project Period (FY) |
2015-04-01 – 2018-03-31
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Project Status |
Completed (Fiscal Year 2018)
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Budget Amount *help |
¥16,640,000 (Direct Cost: ¥12,800,000、Indirect Cost: ¥3,840,000)
Fiscal Year 2017: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2016: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
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Keywords | ユビキチン / 脱ユビキチン化酵素 / エンドサイトーシス / 受容体ダウンレギュレーション / 腫瘍 / クッシング病 / 脳下垂体 / ACTH / 遺伝子 / 蛋白質 / 酵素 / 細胞・組織 / シグナル伝達 / 医療・福祉 / 生理学 / 癌 |
Outline of Final Research Achievements |
Cushing’s disease, one of intractable diseases, is caused by the hypersecretion of adrenocorticotropic hormone (ACTH) from pituitary tumors. In this study, we showed that the gene encoding deubiquitinating enzyme USP8 is frequently mutated in the pituitary tumors of Japanese Cushing’s disease patients. Mechanistically, the mutation induces the increased interaction of USP8 with ubiquitin-binding protein STAM, thereby enhancing USP8 enzyme activity. The mutated form of USP8 excessively deubiquitinates some membrane proteins including EGF receptor, vasopressin receptor V1b and somatostatin receptor SSTR2/5, and affects corticotroph proliferation and hormone secretion.
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Academic Significance and Societal Importance of the Research Achievements |
日本人Cushing病患者で高頻度にUSP8遺伝子に変異が起きているという今回の研究結果は、USP8変異によるCushing病の発症機構の詳細な解析が、わが国におけるCushing病の治療法を確立する上で非常に重要であることを示すものである。また、USP8の遺伝子変異がACTH産生細胞の増殖やホルモン産生に影響する分子メカニズムの一部が明らかとなったことは、未だに特効薬のないCushing病の治療にとって、治療薬開発のための分子基盤を示した成果だと言える。従って、本研究成果は、Cushing病の発症メカニズムの解明に貢献しただけではなく、治療薬開発にも役立つと考えられ、社会的意義は非常に高い。
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Report
(4 results)
Research Products
(63 results)
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[Journal Article] The integral function of the endocytic recycling compartment is regulated by RFFL-mediated ubiquitylation of Rab11 effectors2019
Author(s)
Sakai R, Fukuda R, Unida S, Aki M, Ono Y, Endo A, Kusumi S, Koga D, Fukushima T, Komada M, Okiyoneda T
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Journal Title
J Cell Sci.
Volume: 132
Issue: 3
Pages: 228007-228007
DOI
Related Report
Peer Reviewed
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[Journal Article] IRS-2 deubiquitination by USP9X maintains anchorage-independent cell growth via Erk1/2 activation in prostate carcinoma cell line.2018
Author(s)
Furuta Haruka, Yoshihara Hidehito, Fukushima Toshiaki, Yoneyama Yosuke, Ito Akihiro, Worrall Claire, Girnita Ada, Girnita Leonard, Yoshida Minoru, Asano Tomoichiro, Komada Masayuki, Kataoka Naoyuki, Chida Kazuhiro, Hakuno Fumihiko, Takahashi Shin-Ichiro
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Journal Title
Oncotarget
Volume: 9(74)
Issue: 74
Pages: 33871-33883
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] USP15 attenuates IGF-I signaling by antagonizing Nedd4-induced IRS-2 ubiquitination.2017
Author(s)
Fukushima T, Yoshihara H, Furuta H, Hakuno F, Iemura SI, Natsume T, Nakatsu Y, Kamata H, Asano T, Komada M, Takahashi SI.
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Journal Title
Biochemical and Biophysical Research Communications
Volume: 484
Issue: 3
Pages: 522-528
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Ankrd13 family of ubiquitin-interacting motif-bearing proteins regulates VCP/p97-mediated lysosomal traffic of caveolin-1.2016
Author(s)
Burana, D., Yoshihara, H., Tanno, H., Yamamoto, A., Saeki, Y., Tanaka, K., and Komada, M.
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Journal Title
J. Biol. Chem.
Volume: 291
Issue: 12
Pages: 6218-6231
DOI
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] The USP8 mutational status may predict drug susceptibility in corticotroph adenomas of Cushing's disease.2016
Author(s)
Hayashi, K., Inoshita, N., Kawaguchi, K., Ardisasmita, A.I., Suzuki, H., Fukuhara, N., Okada, M., Nishioka, H., Takeuchi, Y., Komada, M., Takeshita, A., and Yamada, S.
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Journal Title
Eur. J. Endocrinol.
Volume: 174
Issue: 2
Pages: 213-226
DOI
Related Report
Peer Reviewed / Acknowledgement Compliant
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[Presentation] USP8 interactome in Cushing’s disease2016
Author(s)
Masayuki Komada
Organizer
IMPROCUSH-2 (Improving Outcome of Cushing’s Syndrome Symposium 2)
Place of Presentation
Carl Friedrich von Siemens Stiftung (Munich, Germany)
Year and Date
2016-06-23
Related Report
Int'l Joint Research / Invited
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