1. A novel chemical inhibitor suppresses breast cancer cell growth and metastasis through inhibiting HPIP oncoprotein
- Author
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Zhibing Zheng, Xu Cai, Jie Liu, Song Li, Qinong Ye, Yanan Zhang, Ding Lihua, Pengyun Li, Lulu Zhou, Jianbin Li, Zefei Jiang, Huang Yubing, and Shengjie Cao
- Subjects
0301 basic medicine ,Cancer Research ,Immunology ,Article ,Metastasis ,03 medical and health sciences ,Cellular and Molecular Neuroscience ,Breast cancer ,0302 clinical medicine ,medicine ,Cell adhesion ,Protein kinase B ,Transcription factor ,RC254-282 ,QH573-671 ,Chemistry ,Cell growth ,Kinase ,High-throughput screening ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,Cell Biology ,Cell cycle ,medicine.disease ,030104 developmental biology ,030220 oncology & carcinogenesis ,Cancer research ,Cytology ,Extracellular matrix organization - Abstract
Increasing evidence suggests the pivotal role of hematopoietic pre-B-cell leukemia transcription factor (PBX)-interacting protein (HPIP/PBXIP1) in cancer development and progression, indicating that HPIP inhibition may be a promising target for cancer therapy. Here, we screened compounds inhibiting breast cancer cell proliferation with HPIP fused with green fluorescent protein as a reporter. A novel agent named TXX-1-10 derived from rimonabant, an antagonist of cannabinoid receptor 1 with anticancer effects, has been discovered to reduce HPIP expression and has greater inhibitory effects on breast cancer cell growth and metastasis in vitro and in vivo than rimonabant. TXX-1-10 regulates HPIP downstream targets, including several important kinases involved in cancer development and progression (e.g., AKT, ERK1/2, and FAK) as well as cell cycle-, apoptosis-, migration-, and epithelial-to-mesenchymal transition (EMT)-related genes. Consistent with the results of anticancer effects, genome-wide RNA sequencing indicated that TXX-1-10 has more significant effects on regulation of the expression of genes related to DNA replication, cell cycle, apoptosis, cell adhesion, cell migration, and invasion than rimonabant. In addition, TXX-1-10 significantly regulated genes associated with the cell growth and extracellular matrix organization, many of which were shown to be regulated by HPIP. Moreover, compared with rimonabant, TXX-1-10 greatly reduces blood-brain barrier penetrability to avoid adverse central depressive effects. These findings suggest that HPIP inhibition may be a useful strategy for cancer treatment and TXX-1-10 is a promising candidate drug for cancer therapy.
- Published
- 2021