Targeting BAP1 with small compound inhibitor for colon cancer treatment

Minhwa Kang, Seul Gi Park, Shin Ai Lee, Soyi Kim, Daye Lee, Mukesh Eknath Shirbhate, So Yeon Youn, Kwan Mook Kim, Sun Shin Cha, Jongbum Kwon

Research output: Contribution to journalArticlepeer-review

Abstract

BRCA1-associated protein-1 (BAP1) is a ubiquitin C-terminal hydrolase domain-containing deubiquitinase. The gene encoding BAP1 is mutated in various human cancers, including mesothelioma, uveal melanoma and renal cell carcinoma. BAP1 plays roles in many cancer-related cellular functions, including cell proliferation, cell death, and nuclear processes crucial for genome stability, such as DNA repair and replication. While these findings suggest that BAP1 functions as a tumor suppressor, recent data also suggest that BAP1 might play tumor-promoting roles in certain cancers, such as breast cancer and hematopoietic malignancies. Here, we show that BAP1 is upregulated in colon cancer cells and tissues and that BAP1 depletion reduces colon cancer cell proliferation and tumor growth. BAP1 contributes to colon cancer cell proliferation by accelerating DNA replication and suppressing replication stress and concomitant apoptosis. A recently identified BAP1 inhibitor, TG2-179-1, which seems to covalently bind to the active site of BAP1, exhibits potent cytotoxic activity against colon cancer cells, with half-maximal inhibitory concentrations of less than 10 μM, and inhibits colon tumor growth. TG2-179-1 exerts cytotoxic activity by targeting BAP1, leading to defective replication and increased apoptosis. This work therefore shows that BAP1 acts oncogenically in colon cancer and is a potential therapeutic target for this cancer. Our work also suggests that TG2-179-1 can be developed as a potential therapeutic agent for colon cancer.

Original languageEnglish
Article number2264
JournalScientific Reports
Volume13
Issue number1
DOIs
StatePublished - Dec 2023

Bibliographical note

Funding Information:
This work was supported by grants 2021R1A2C1008613, 2019R1A5A6099645, 2022R1I1A1A01073047 and 2021R1A2C2014341 from the National Research Foundation of Korea and by KOPRI Grant PM23030 (20200610) from the Ministry of Oceans and Fisheries, Korea.

Publisher Copyright:
© 2023, The Author(s).

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