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Leonurine suppresses renal cell carcinoma progression by targeting the PDK1-mediated Warburg effect
Tiaodi Qian1,2, Xuan Zhou1,2, Jiajie Hu1,2
1Department of Endoscopy Center, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China.
Background:
Leonurine (Leo), a bioactive alkaloid derived from Leonurus japonicus, has demonstrated anti-tumor potential in various malignancies; however, its specific role and molecular targets in renal cell carcinoma (RCC) remain to be elucidated. In this study, we aim to offer a novel perspective on Leo's role in the treatment of RCC, and to provide guidance for the development of new anti-RCC drugs.
Methods:
The anti-tumor efficacy of Leo was evaluated in RCC cell lines through Cell Counting Kit-8 (CCK-8), colony formation, flow cytometry, and Transwell assays. In silico prediction via the ChEMBL database was utilized to identify potential molecular targets, which were further validated using microscale thermophoresis (MST), molecular docking, and cell thermal shift assays (CETSA). Glycolytic flux was assessed by measuring the extracellular acidification rate (ECAR), glucose uptake, lactate secretion, and intracellular adenosine triphosphate (ATP) levels. Rescue experiments were employed to confirm the involvement of the pyruvate dehydrogenase kinase 1 (PDK1)-mediated metabolic axis. Subcutaneous xenograft mouse model was used to evaluate the role of Leo in RCC progression.
Results:
Leonurine significantly inhibited the proliferation and migration of RCC cells while inducing apoptosis in a dose-dependent manner. Mechanistically, Leo was found to interact directly with PDK1 with high affinity, leading to the downregulation of PDK1 protein levels. Functional studies revealed that Leo effectively suppressed the Warburg effect in RCC cells. Notably, the ectopic overexpression of PDK1 significantly abrogated the inhibitory effects of Leo on cell growth, metastasis, and glycolytic metabolism. Consistently, in vivo experiments demonstrated that Leo administration markedly restricted tumor growth in xenograft mice.
Conclusions:
Leo acts as a novel metabolic inhibitor in RCC by directly targeting the PDK1-mediated glycolytic pathway.
Insights
Leonurine (Leo) inhibits renal cell carcinoma (RCC) progression by targeting pyruvate dehydrogenase kinase 1 (PDK1), suppressing the Warburg effect, and restricting tumor growth. This study reveals Leo as a novel metabolic inhibitor for RCC treatment.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Leonurine (Leo), a bioactive alkaloid from Leonurus japonicus, shows anti-tumor potential.
- Its specific role and molecular targets in renal cell carcinoma (RCC) require elucidation.
- This study offers a novel perspective on Leo's anti-RCC mechanisms.
Purpose of the Study:
- To investigate the anti-tumor effects of Leonurine (Leo) in renal cell carcinoma (RCC).
- To identify the molecular targets and metabolic pathways affected by Leo in RCC.
- To provide insights for developing new anti-RCC drugs.
Main Methods:
- Evaluated Leo's efficacy in RCC cell lines using CCK-8, colony formation, flow cytometry, and Transwell assays.
- Identified potential targets via in silico prediction (ChEMBL) and validated using MST, molecular docking, and CETSA.
- Assessed glycolytic flux and confirmed the PDK1-mediated metabolic axis involvement through rescue experiments and in vivo xenograft models.
Main Results:
- Leonurine significantly inhibited RCC cell proliferation and migration, inducing apoptosis.
- Leo directly interacted with pyruvate dehydrogenase kinase 1 (PDK1), downregulating its protein levels.
- Leo suppressed the Warburg effect, and PDK1 overexpression abrogated Leo's inhibitory effects; in vivo studies confirmed restricted tumor growth.
Conclusions:
- Leonurine (Leo) acts as a novel metabolic inhibitor in RCC.
- It targets the PDK1-mediated glycolytic pathway.
- Leo demonstrates therapeutic potential for renal cell carcinoma treatment.
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