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Su T, Huang S, Zhang Y, Guo Y, Zhang S, Guan J, Meng M, Liu L, Wang C, Yu D, Kwan HY, Huang Z, Huang Q, Lai-Han Leung E, Hu M, Wang Y, Liu Z, Lu L. miR-7/TGF- β2 axis sustains acidic tumor microenvironment-induced lung cancer metastasis. Acta Pharm Sin B 2022; 12:821-837. [PMID: 35251919 PMCID: PMC8896986 DOI: 10.1016/j.apsb.2021.06.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 04/23/2021] [Accepted: 05/19/2021] [Indexed: 12/26/2022] Open
Abstract
Acidosis, regardless of hypoxia involvement, is recognized as a chronic and harsh tumor microenvironment (TME) that educates malignant cells to thrive and metastasize. Although overwhelming evidence supports an acidic environment as a driver or ubiquitous hallmark of cancer progression, the unrevealed core mechanisms underlying the direct effect of acidification on tumorigenesis have hindered the discovery of novel therapeutic targets and clinical therapy. Here, chemical-induced and transgenic mouse models for colon, liver and lung cancer were established, respectively. miR-7 and TGF-β2 expressions were examined in clinical tissues (n = 184). RNA-seq, miRNA-seq, proteomics, biosynthesis analyses and functional studies were performed to validate the mechanisms involved in the acidic TME-induced lung cancer metastasis. Our data show that lung cancer is sensitive to the increased acidification of TME, and acidic TME-induced lung cancer metastasis via inhibition of miR-7-5p. TGF-β2 is a direct target of miR-7-5p. The reduced expression of miR-7-5p subsequently increases the expression of TGF-β2 which enhances the metastatic potential of the lung cancer. Indeed, overexpression of miR-7-5p reduces the acidic pH-enhanced lung cancer metastasis. Furthermore, the human lung tumor samples also show a reduced miR-7-5p expression but an elevated level of activated TGF-β2; the expressions of both miR-7-5p and TGF-β2 are correlated with patients' survival. We are the first to identify the role of the miR-7/TGF-β2 axis in acidic pH-enhanced lung cancer metastasis. Our study not only delineates how acidification directly affects tumorigenesis, but also suggests miR-7 is a novel reliable biomarker for acidic TME and a novel therapeutic target for non-small cell lung cancer (NSCLC) treatment. Our study opens an avenue to explore the pH-sensitive subcellular components as novel therapeutic targets for cancer treatment.
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Key Words
- AOM/DSS, azoxymethane/dextran sodium sulfate
- Acidic tumor microenvironment
- B[a]P, benzopyrene
- CA9, carbonic anhydrase IX
- DAB, diaminobenzidine
- DAVID, Database for Annotation, Visualization, and Integrated Discovery
- DEGs, differentially expressed genes
- DEN, diethylnitrosamine
- DEPs, differentially expressed proteins
- DSS, dextran sodium sulfate
- GEMMs, genetically engineered tumor mouse models
- GSEA, gene set enrichment analysis
- IHC, immunohistochemistry
- ISH, in situ hybridization
- Invasion
- KEGG, Kyoto Encyclopedia of Genes and Genomes
- LUAD, lung adenocarcinoma
- LUSC, lung squamous cell carcinoma
- Lung cancer
- MCT, monocarboxylate transporter
- Metastasis
- NHE, Na+/H+ exchanger
- NSCLC, non-small cell lung cancer
- PCR, polymerase chain reaction
- TGF-β2
- TME, tumor microenvironment
- TMT, tandem mass tagging
- V-ATPase, vacuolar ATPase
- miR-7-5p
- pH
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Hermawan A, Ikawati M, Jenie RI, Khumaira A, Putri H, Nurhayati IP, Angraini SM, Muflikhasari HA. Identification of potential therapeutic target of naringenin in breast cancer stem cells inhibition by bioinformatics and in vitro studies. Saudi Pharm J 2021; 29:12-26. [PMID: 33603536 PMCID: PMC7873751 DOI: 10.1016/j.jsps.2020.12.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Accepted: 12/03/2020] [Indexed: 12/15/2022] Open
Abstract
Cancer therapy is a strategic measure in inhibiting breast cancer stem cell (BCSC) pathways. Naringenin, a citrus flavonoid, was found to increase breast cancer cells' sensitivity to chemotherapeutic agents. Bioinformatics study and 3D tumorsphere in vitro modeling in breast cancer (mammosphere) were used in this study, which aims to explore the potential therapeutic targets of naringenin (PTTNs) in inhibiting BCSCs. Bioinformatic analyses identified direct target proteins (DTPs), indirect target proteins (ITPs), naringenin-mediated proteins (NMPs), BCSC regulatory genes, and PTTNs. The PTTNs were further analyzed for gene ontology, Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment, protein-protein interaction (PPI) networks, and hub protein selection. Mammospheres were cultured in serum-free media. The effects of naringenin were measured by MTT-based cytotoxicity, mammosphere forming potential (MFP), colony formation, scratch wound-healing assay, and flow cytometry-based cell cycle analyses and apoptosis assays. Gene expression analysis was performed using real-time quantitative polymerase chain reaction (q-RT PCR). Bioinformatics analysis revealed p53 and estrogen receptor alpha (ERα) as PTTNs, and KEGG pathway enrichment analysis revealed that TGF-ß and Wnt/ß-catenin pathways are regulated by PTTNs. Naringenin demonstrated cytotoxicity and inhibited mammosphere and colony formation, migration, and epithelial to mesenchymal transition in the mammosphere. The mRNA of tumor suppressors P53 and ERα were downregulated in the mammosphere, but were significantly upregulated upon naringenin treatment. By modulating the P53 and ERα mRNA, naringenin has the potential of inhibiting BCSCs. Further studies on the molecular mechanism and formulation of naringenin in BCSCs would be beneficial for its development as a BCSC-targeting drug.
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Key Words
- BCSCs, Breast cancer stem cells
- Bioinformatics
- Breast cancer stem cells
- CSC, Cancer stem cell
- DAVID, Database for Annotation, Visualization, and Integrated Discovery
- DTPs, Direct target proteins
- DXR, Doxorubicin
- EGF, Epidermal growth factor
- EMT, Epithelial to mesenchymal transition
- ERα
- FITC, fluorescein isothiocyanate
- GO, Gene ontology
- ITPs, Indirect target proteins
- KEGG, Kyoto Encyclopedia of Genes and Genomes
- MET, Metformin
- MFP, Mammosphere forming potential
- NAR, Naringenin
- NMPs, Naringenin-mediated proteins
- Naringenin
- P53
- PE, phycoerythrin
- PPI, Protein-protein interaction
- PTTN, Potential target of naringenin in inhibition of BCSCs
- ROS, Reactive oxygen species
- Targeted therapy
- q-RT PCR, Quantitative real-time polymerase chain reaction
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Affiliation(s)
- Adam Hermawan
- Laboratory of Macromolecular Engineering, Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Universitas Gadjah Mada Sekip Utara II, 55281 Yogyakarta, Indonesia
| | - Muthi Ikawati
- Laboratory of Macromolecular Engineering, Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Universitas Gadjah Mada Sekip Utara II, 55281 Yogyakarta, Indonesia
| | - Riris Istighfari Jenie
- Laboratory of Macromolecular Engineering, Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Universitas Gadjah Mada Sekip Utara II, 55281 Yogyakarta, Indonesia
| | - Annisa Khumaira
- Cancer Chemoprevention Research Center, Faculty of Pharmacy, Universitas Gadjah Mada Sekip Utara II, 55281 Yogyakarta, Indonesia
| | - Herwandhani Putri
- Cancer Chemoprevention Research Center, Faculty of Pharmacy, Universitas Gadjah Mada Sekip Utara II, 55281 Yogyakarta, Indonesia
| | - Ika Putri Nurhayati
- Cancer Chemoprevention Research Center, Faculty of Pharmacy, Universitas Gadjah Mada Sekip Utara II, 55281 Yogyakarta, Indonesia
| | - Sonia Meta Angraini
- Cancer Chemoprevention Research Center, Faculty of Pharmacy, Universitas Gadjah Mada Sekip Utara II, 55281 Yogyakarta, Indonesia
| | - Haruma Anggraini Muflikhasari
- Cancer Chemoprevention Research Center, Faculty of Pharmacy, Universitas Gadjah Mada Sekip Utara II, 55281 Yogyakarta, Indonesia
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