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KMID : 0606920220300040340
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Biomolecules & Therapeutics
2022 Volume.30 No. 4 p.340 ~ p.347
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PRR16/Largen Induces Epithelial-Mesenchymal Transition through the Interaction with ABI2 Leading to the Activation of ABL1 Kinase
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Kang Gyeoung-Jin
Park Jung-Ho
Kim Hyun-Ji
Kim Eun-Ji
Kim Bo-Ram
Byun Hyun-Jung
Yu Lu
Nguyen Tuan Minh
Nguyen Thi Ha
Kim Kyung-Sung
Huy Hieu Phung
Rahman Mostafizur
Kim Ye-Hyeon
Jang Ji-Yun
Park Mi-Kyung
Lee Ho
Choi Chang-Ick
Lee Kyeong
Han Hyo-Kyung
Cho Jung-Sook
Rho Seung-Bae
Lee Chang-Hoon
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Abstract
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Advanced or metastatic breast cancer affects multiple organs and is a leading cause of cancer-related death. Cancer metastasis is associated with epithelial-mesenchymal metastasis (EMT). However, the specific signals that induce and regulate EMT in carcinoma cells remain unclear. PRR16/Largen is a cell size regulator that is independent of mTOR and Hippo signalling pathways. However, little is known about the role PRR16 plays in the EMT process. We found that the expression of PRR16 was increased in mesenchymal breast cancer cell lines. PRR16 overexpression induced EMT in MCF7 breast cancer cells and enhances migration and invasion. To determine how PRR16 induces EMT, the binding proteins for PRR16 were screened, revealing that PRR16 binds to Abl interactor 2 (ABI2). We then investigated whether ABI2 is involved in EMT. Gene silencing of ABI2 induces EMT, leading to enhanced migration and invasion. ABI2 is a gene that codes for a protein that interacts with ABL proto-oncogene 1 (ABL1) kinase. Therefore, we investigated whether the change in ABI2 expression affected the activation of ABL1 kinase. The knockdown of ABI2 and PRR16 overexpression increased the phosphorylation of Y412 in ABL1 kinase. Our results suggest that PRR16 may be involved in EMT by binding to ABI2 and interfering with its inhibition of ABL1 kinase. This indicates that ABL1 kinase inhibitors may be potential therapeutic agents for the treatment of PRR16-related breast cancer.
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KEYWORD
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PRR16, ABI2, ABL1 kinase, Epithelial-mesenchymal transition, Breast cancer
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