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Ren YL, Lei JT, Zhang TR, Lu P, Cui DD, Yang B, Zhao GY, Peng F, Cao ZX, Peng C, Li YZ. Isobavachalcone, a natural sirtuin 2 inhibitor, exhibits anti-triple-negative breast cancer efficacy in vitro and in vivo. Phytother Res 2024; 38:1815-1829. [PMID: 38349045 DOI: 10.1002/ptr.8143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 01/19/2024] [Accepted: 01/22/2024] [Indexed: 04/10/2024]
Abstract
Triple-negative breast cancer (TNBC) is the most aggressive and lethal clinical subtype and lacks effective targeted therapies at present. Isobavachalcone (IBC), the main active component of Psoralea corylifolia L., has potential anticancer effects. Herein, we identified IBC as a natural sirtuin 2 (SIRT2) inhibitor and characterized the potential mechanisms underlying the inhibition of TNBC. Molecular dynamics analysis, enzyme activity assay, and cellular thermal shift assay were performed to evaluate the combination of IBC and SIRT2. The therapeutic effects, mechanism, and safety of IBC were analyzed in vitro and in vivo using cellular and xenograft models. IBC effectively inhibited SIRT2 enzyme activity with an IC50 value of 0.84 ± 0.22 μM by forming hydrogen bonds with VAL233 and ALA135 within its catalytic domain. In the cellular environment, IBC bound to and stabilized SIRT2, consequently inhibiting cellular proliferation and migration, and inducing apoptosis and cell cycle arrest by disrupting the SIRT2/α-tubulin interaction and inhibiting the downstream Snail/MMP and STAT3/c-Myc pathways. In the in vivo model, 30 mg/kg IBC markedly inhibited tumor growth by targeting the SIRT2/α-tubulin interaction. Furthermore, IBC exerted its effects by inducing apoptosis in tumor tissues and was well-tolerated. IBC alleviated TNBC by targeting SIRT2 and triggering the reactive oxygen species ROS/β-catenin/CDK2 axis. It is a promising natural lead compound for future development of SIRT2-targeting drugs.
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Affiliation(s)
- Ya-Li Ren
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Jie-Ting Lei
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Ting-Rui Zhang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Peng Lu
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Dan-Dan Cui
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Bo Yang
- West China School of Pharmacy, Sichuan University, Chengdu, China
- Department of Pharmacy, The Seventh People's Hospital of Chengdu, Chengdu, China
- Department of Pharmacy, Panzhihua Central Hospital, Dali University, Panzhihua, China
| | - Gui-Ying Zhao
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Fu Peng
- West China School of Pharmacy, Sichuan University, Chengdu, China
| | - Zhi-Xing Cao
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Cheng Peng
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yu-Zhi Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
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