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Tai SB, Huang CY, Chung CL, Sung PJ, Wen ZH, Chen CL. Prodigiosin Inhibits Transforming Growth Factor β Signaling by Interfering Receptor Recycling and Subcellular Translocation in Epithelial Cells. Mol Pharmacol 2024; 105:286-300. [PMID: 38278554 DOI: 10.1124/molpharm.123.000776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 12/05/2023] [Accepted: 01/02/2024] [Indexed: 01/28/2024] Open
Abstract
Prodigiosin (PG) is a naturally occurring polypyrrole red pigment produced by numerous microorganisms including some Serratia and Streptomyces strains. PG has exhibited promising anticancer activity; however, the molecular mechanisms of action of PG on malignant cells remain ambiguous. Transforming growth factor-β (TGF-β) is a multifunctional cytokine that governs a wide array of cellular processes in development and tissue homeostasis. Malfunctions of TGF-β signaling are associated with numerous human cancers. Emerging evidence underscores the significance of internalized TGF-β receptors and their intracellular trafficking in initiating signaling cascades. In this study, we identified PG as a potent inhibitor of the TGF-β pathway. PG blocked TGF-β signaling by targeting multiple sites of this pathway, including facilitating the sequestering of TGF-β receptors in the cytoplasm by impeding the recycling of type II TGF-β receptors to the cell surface. Additionally, PG prompts a reduction in the abundance of receptors on the cell surface through the disruption of the receptor glycosylation. In human Caucasian lung carcinoma cells and human hepatocellular cancer cell line cells, nanomolar concentrations of PG substantially diminish TGF-β-triggered phosphorylation of Smad2 protein. This attenuation is further reflected in the suppression of downstream target gene expression, including those encoding fibronectin, plasminogen activator inhibitor-1, and N-cadherin. SIGNIFICANCE STATEMENT: Prodigiosin (PG) emerges from this study as a potent TGF-β pathway inhibitor, disrupting receptor trafficking and glycosylation and reducing TGF-β signaling and downstream gene expression. These findings not only shed light on PG's potential therapeutic role but also present a captivating avenue towards future anti-TGF-β strategies.
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Affiliation(s)
- Shun-Ban Tai
- Departments of Marine Biotechnology and Resources (S.-B.T., Z.-H.W.) and Biological Sciences (C.-L.Chu., C.-L.Che.), National Sun Yat-Sen University, Kaohsiung, Taiwan; Division of Rheumatology, Immunology and Allergy, Department of Internal Medicine, Zuoying Armed Forces General Hospital, Kaohsiung, Taiwan (S.-B.T.); Department of Orthopaedics, Kaohsiung Armed Forces General Hospital, Kaohsiung, Taiwan (C.-y.H.); National Museum of Marine Biology and Aquarium, Pingtung, Taiwan (P.-J.S.); and Department of Biotechnology (C.-L.Che.) and Graduate Institute of Natural Products, College of Pharmacy (C.-L.Che.), Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chih-Yin Huang
- Departments of Marine Biotechnology and Resources (S.-B.T., Z.-H.W.) and Biological Sciences (C.-L.Chu., C.-L.Che.), National Sun Yat-Sen University, Kaohsiung, Taiwan; Division of Rheumatology, Immunology and Allergy, Department of Internal Medicine, Zuoying Armed Forces General Hospital, Kaohsiung, Taiwan (S.-B.T.); Department of Orthopaedics, Kaohsiung Armed Forces General Hospital, Kaohsiung, Taiwan (C.-y.H.); National Museum of Marine Biology and Aquarium, Pingtung, Taiwan (P.-J.S.); and Department of Biotechnology (C.-L.Che.) and Graduate Institute of Natural Products, College of Pharmacy (C.-L.Che.), Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chih-Ling Chung
- Departments of Marine Biotechnology and Resources (S.-B.T., Z.-H.W.) and Biological Sciences (C.-L.Chu., C.-L.Che.), National Sun Yat-Sen University, Kaohsiung, Taiwan; Division of Rheumatology, Immunology and Allergy, Department of Internal Medicine, Zuoying Armed Forces General Hospital, Kaohsiung, Taiwan (S.-B.T.); Department of Orthopaedics, Kaohsiung Armed Forces General Hospital, Kaohsiung, Taiwan (C.-y.H.); National Museum of Marine Biology and Aquarium, Pingtung, Taiwan (P.-J.S.); and Department of Biotechnology (C.-L.Che.) and Graduate Institute of Natural Products, College of Pharmacy (C.-L.Che.), Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Ping-Jyun Sung
- Departments of Marine Biotechnology and Resources (S.-B.T., Z.-H.W.) and Biological Sciences (C.-L.Chu., C.-L.Che.), National Sun Yat-Sen University, Kaohsiung, Taiwan; Division of Rheumatology, Immunology and Allergy, Department of Internal Medicine, Zuoying Armed Forces General Hospital, Kaohsiung, Taiwan (S.-B.T.); Department of Orthopaedics, Kaohsiung Armed Forces General Hospital, Kaohsiung, Taiwan (C.-y.H.); National Museum of Marine Biology and Aquarium, Pingtung, Taiwan (P.-J.S.); and Department of Biotechnology (C.-L.Che.) and Graduate Institute of Natural Products, College of Pharmacy (C.-L.Che.), Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Zhi-Hong Wen
- Departments of Marine Biotechnology and Resources (S.-B.T., Z.-H.W.) and Biological Sciences (C.-L.Chu., C.-L.Che.), National Sun Yat-Sen University, Kaohsiung, Taiwan; Division of Rheumatology, Immunology and Allergy, Department of Internal Medicine, Zuoying Armed Forces General Hospital, Kaohsiung, Taiwan (S.-B.T.); Department of Orthopaedics, Kaohsiung Armed Forces General Hospital, Kaohsiung, Taiwan (C.-y.H.); National Museum of Marine Biology and Aquarium, Pingtung, Taiwan (P.-J.S.); and Department of Biotechnology (C.-L.Che.) and Graduate Institute of Natural Products, College of Pharmacy (C.-L.Che.), Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chun-Lin Chen
- Departments of Marine Biotechnology and Resources (S.-B.T., Z.-H.W.) and Biological Sciences (C.-L.Chu., C.-L.Che.), National Sun Yat-Sen University, Kaohsiung, Taiwan; Division of Rheumatology, Immunology and Allergy, Department of Internal Medicine, Zuoying Armed Forces General Hospital, Kaohsiung, Taiwan (S.-B.T.); Department of Orthopaedics, Kaohsiung Armed Forces General Hospital, Kaohsiung, Taiwan (C.-y.H.); National Museum of Marine Biology and Aquarium, Pingtung, Taiwan (P.-J.S.); and Department of Biotechnology (C.-L.Che.) and Graduate Institute of Natural Products, College of Pharmacy (C.-L.Che.), Kaohsiung Medical University, Kaohsiung, Taiwan
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Yang JL, Lin WL, Tai SB, Ciou YS, Chung CL, Chen JJ, Liu PF, Lin MW, Chen CL. Suppression of TGFβ-Induced Interleukin-6 Secretion by Sinulariolide from Soft Corals through Attenuation of the p38-NF-kB Pathway in Carcinoma Cells. Int J Mol Sci 2023; 24:11656. [PMID: 37511415 PMCID: PMC10380600 DOI: 10.3390/ijms241411656] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 07/13/2023] [Accepted: 07/17/2023] [Indexed: 07/30/2023] Open
Abstract
Sinulariolide (SC-1) is a natural product extracted from the cultured-type soft coral Sinularia flexibilis and possesses anti-inflammation, anti-proliferative, and anti-migratory in several types of cancer cells. However, the molecular pathway behind its effects on inflammation remains poorly understood. Since inflammatory cytokines such as TGFβ, TNFα, IL-1, IL-6, and IL-8 activate transcription factors such as Smads, NF-κB, STAT3, Snail, Twist, and Zeb that drive the epithelial-to-mesenchymal transition (EMT), in this study, we focus on the investigation in effects of SC-1 on TGFβ-induced interleukin-6 (IL-6) releases in an in vitro cell culture model. We showed that both intracellular IL-6 expression and secretion were stimulated by TGFβ and associated with strong upregulation of IL-6 mRNA and increased transcription in A549 cells. SC-1 blocked TGFβ-induced secretion of IL-6 while showing no effect on the induction of fibronectin and plasminogen activator inhibitor-1 genes, indicating that SC-1 interferes with only a subset of TGFβ activities. In addition, SC-1 inhibits TGFβ-induced IL-6 by suppressing p38 MAPK signaling and subsequently inhibits NF-κB and its nuclear translocation without affecting the canonical Smad pathway and receptor turnover. Overall, these data suggest that p38 may involve in the inhibition of SC-1 in IL-6 release, thus illustrating an inhibitory effect for SC-1 in the suppression of inflammation, EMT phenotype, and tumorigenesis.
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Affiliation(s)
- Jenq-Lin Yang
- Institute for Translational Research in Biomedicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan
| | - Weng-Ling Lin
- Department of Pathology, Kaohsiung Armed Forces General Hospital, Kaohsiung 80284, Taiwan
| | - Shun-Ban Tai
- Department of Biological Sciences, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan
- Division of Rheumatology, Immunology and Allergy, Department of Internal Medicine, Zuoying Branch of Kaohsiung Armed Forces General Hospital, Kaohsiung 81342, Taiwan
| | - Yi-Siang Ciou
- Department of Biological Sciences, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan
| | - Chih-Ling Chung
- Department of Biological Sciences, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan
| | - Jih-Jung Chen
- Department of Pharmacy, School of Pharmaceutical Sciences, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung 404332, Taiwan
| | - Pei-Feng Liu
- Department of Biomedical Science and Environmental Biology, Kaohsiung Medical University, Kaohsiung 80756, Taiwan
| | - Ming-Wei Lin
- Department of Medical Research, E-Da Hospital/E-Da Cancer Hospital, Kaohsiung 82445, Taiwan
| | - Chun-Lin Chen
- Department of Biological Sciences, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan
- Department of Biotechnology, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 80756, Taiwan
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Huang SF, Wang YL, Chen JJ, Huang YB, Tai SB, Chung CL, Chen CL. Garcimultiflorone K from Garcinia multiflora attenuates hepatocellular carcinoma metastasis by suppressing transforming growth factor-β signaling. Phytomedicine 2021; 84:153502. [PMID: 33647775 DOI: 10.1016/j.phymed.2021.153502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 02/03/2021] [Accepted: 02/05/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND Transforming growth factor‑β (TGF-β) signaling is a crucial inducer of tissue fibrosis and extracellular matrix accumulation and a vital suppressor of epithelial cell proliferation and cancer metastasis. The nature of this multifunctional cytokine has prompted the development of TGF-β signaling inhibitors as therapeutic agents. Our research group has recently isolated the polyprenylated polycyclic acylphloroglucinol garcimultiflorone K (GMK) from the stems of Garcinia multiflora; GMK exhibits antiangiogenic activity in endothelial cells. PURPOSE In the current study, we aimed to explore the antitumor effect and detailed mechanisms of Garcimultiflorone K in hepatocellular carcinoma cells. METHODS Cell proliferation and viability were evaluated using the MTT assay. The migratory ability of HepG2 cells was measured using wound healing assays. The inhibitory effect of GMK against the nuclear translocation of Smad by TGF-β was assessed through immunofluorescence staining and Western blotting. To investigate TGF-β-dependent gene expression profiles upon GMK stimulation, RNA transcript levels were determined using reverse transcription polymerase chain reaction. The effects of GMK in Smad2-driven transcriptomic activities were studied using a reporter gene assay. Protein levels were detected using Western blotting. RESULTS Our data revealed that GMK inhibited TGF-β-induced cellular responses, including Smad protein phosphorylation, cell migration, and extracellular matrix production, during epithelial-mesenchymal transition (EMT). Mechanistic studies further demonstrated that GMK suppressed TGF-β signaling by downregulating TGF-β receptor II (TβRII). CONCLUSION These findings elucidate that TβRII expression in hepatic cells can be specifically suppressed by GMK to attenuate metastasis and the disease-promoting effects of EMT, representing a therapeutic approach.
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Affiliation(s)
- Shu-Fang Huang
- Department of Medicine Chest, Kaohsiung Armed Forces General Hospital, Kaohsiung 80284, Taiwan ROC
| | - Yu-Lun Wang
- Department of Biological Sciences, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan ROC
| | - Jih-Jung Chen
- Faculty of Pharmacy, School of Pharmaceutical Sciences, National Yang-Ming Chiao-Tung University, Taipei 11221, Taiwan ROC; Department of Medical Research, China Medical University Hospital, Taichung 40402, Taiwan ROC
| | - Yaw-Bin Huang
- Department of Pharmacy, School of Pharmacy, Kaohsiung Medical University, Kaohsiung 80708, Taiwan ROC
| | - Shun-Ban Tai
- Department of Biological Sciences, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan ROC; Division of Rheumatology, Immunology and Allergy, Department of Internal Medicine, Zuoying Branch of Kaohsiung Armed Forces General Hospital, Kaohsiung 81342, Taiwan ROC
| | - Chih-Ling Chung
- Department of Biological Sciences, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan ROC
| | - Chun-Lin Chen
- Department of Biological Sciences, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan ROC; Department of Biotechnology, Kaohsiung Medical University, Kaohsiung 80708, Taiwan ROC; Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung 80708, Taiwan ROC.
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