1
|
Farmaki E, Nath A, Emond R, Karimi KL, Grolmusz VK, Cosgrove PA, Bild AH. ONC201/TIC10 enhances durability of mTOR inhibitor everolimus in metastatic ER+ breast cancer. eLife 2023; 12:e85898. [PMID: 37772709 PMCID: PMC10541180 DOI: 10.7554/elife.85898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 08/17/2023] [Indexed: 09/30/2023] Open
Abstract
The mTOR inhibitor, everolimus, is an important clinical management component of metastatic ER+ breast cancer (BC). However, most patients develop resistance and progress on therapy, highlighting the need to discover strategies that increase mTOR inhibitor effectiveness. We developed ER+ BC cell lines, sensitive or resistant to everolimus, and discovered that combination treatment of ONC201/TIC10 with everolimus inhibited cell growth in 2D/3D in vitro studies. We confirmed increased therapeutic response in primary patient cells progressing on everolimus, supporting clinical relevance. We show that ONC201/TIC10 mechanism in metastatic ER+ BC cells involves oxidative phosphorylation inhibition and stress response activation. Transcriptomic analysis in everolimus resistant breast patient tumors and mitochondrial functional assays in resistant cell lines demonstrated increased mitochondrial respiration dependency, contributing to ONC201/TIC10 sensitivity. We propose that ONC201/TIC10 and modulation of mitochondrial function may provide an effective add-on therapy strategy for patients with metastatic ER+ BCs resistant to mTOR inhibitors.
Collapse
Affiliation(s)
- Elena Farmaki
- Department of Medical Oncology and Therapeutics Research, City of Hope National Medical CenterDuarteUnited States
| | - Aritro Nath
- Department of Medical Oncology and Therapeutics Research, City of Hope National Medical CenterDuarteUnited States
| | - Rena Emond
- Department of Medical Oncology and Therapeutics Research, City of Hope National Medical CenterDuarteUnited States
| | - Kimya L Karimi
- Department of Medical Oncology and Therapeutics Research, City of Hope National Medical CenterDuarteUnited States
| | - Vince K Grolmusz
- Department of Medical Oncology and Therapeutics Research, City of Hope National Medical CenterDuarteUnited States
| | - Patrick A Cosgrove
- Department of Medical Oncology and Therapeutics Research, City of Hope National Medical CenterDuarteUnited States
| | - Andrea H Bild
- Department of Medical Oncology and Therapeutics Research, City of Hope National Medical CenterDuarteUnited States
| |
Collapse
|
2
|
Pan Z, Zhang H, Dokudovskaya S. The Role of mTORC1 Pathway and Autophagy in Resistance to Platinum-Based Chemotherapeutics. Int J Mol Sci 2023; 24:10651. [PMID: 37445831 DOI: 10.3390/ijms241310651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 06/21/2023] [Accepted: 06/23/2023] [Indexed: 07/15/2023] Open
Abstract
Cisplatin (cis-diamminedichloroplatinum I) is a platinum-based drug, the mainstay of anticancer treatment for numerous solid tumors. Since its approval by the FDA in 1978, the drug has continued to be used for the treatment of half of epithelial cancers. However, resistance to cisplatin represents a major obstacle during anticancer therapy. Here, we review recent findings on how the mTORC1 pathway and autophagy can influence cisplatin sensitivity and resistance and how these data can be applicable for the development of new therapeutic strategies.
Collapse
Affiliation(s)
- Zhenrui Pan
- CNRS UMR9018, Institut Gustave Roussy, Université Paris-Saclay, 94805 Villejuif, France
| | - Hanxiao Zhang
- CNRS UMR9018, Institut Gustave Roussy, Université Paris-Saclay, 94805 Villejuif, France
| | - Svetlana Dokudovskaya
- CNRS UMR9018, Institut Gustave Roussy, Université Paris-Saclay, 94805 Villejuif, France
| |
Collapse
|
3
|
Wu C, Spector SA, Theodoropoulos G, Nguyen DJM, Kim EY, Garcia A, Savaraj N, Lim DC, Paul A, Feun LG, Bickerdike M, Wangpaichitr M. Dual inhibition of IDO1/TDO2 enhances anti-tumor immunity in platinum-resistant non-small cell lung cancer. Cancer Metab 2023; 11:7. [PMID: 37226257 DOI: 10.1186/s40170-023-00307-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 05/10/2023] [Indexed: 05/26/2023] Open
Abstract
BACKGROUND The impact of non-small cell lung cancer (NSCLC) metabolism on the immune microenvironment is not well understood within platinum resistance. We have identified crucial metabolic differences between cisplatin-resistant (CR) and cisplatin-sensitive (CS) NSCLC cells with elevated indoleamine 2,3-dioxygenase-1 (IDO1) activity in CR, recognized by increased kynurenine (KYN) production. METHODS Co-culture, syngeneic, and humanize mice models were utilized. C57BL/6 mice were inoculated with either Lewis lung carcinoma mouse cells (LLC) or their platinum-resistant counterpart (LLC-CR) cells. Humanized mice were inoculated with either A (human CS cells) or ALC (human CR cells). Mice were treated with either IDO1 inhibitor or TDO2 (tryptophan 2,3-dioxygenase-2) inhibitor at 200 mg/kg P.O. once a day for 15 days; or with a new-in-class, IDO1/TDO2 dual inhibitor AT-0174 at 170 mg/kg P.O. once a day for 15 days with and without anti-PD1 antibody (10 mg/kg, every 3 days). Immune profiles and KYN and tryptophan (TRP) production were evaluated. RESULTS CR tumors exhibited a more highly immunosuppressive environment that debilitated robust anti-tumor immune responses. IDO1-mediated KYN production from CR cells suppressed NKG2D on immune effector natural killer (NK) and CD8+ T cells and enhanced immunosuppressive populations of regulatory T cells (Tregs) and myeloid-derived suppressor cells (MDSCs). Importantly, while selective IDO1 inhibition attenuated CR tumor growth, it concomitantly upregulated the TDO2 enzyme. To overcome the compensatory induction of TDO2 activity, we employed the IDO1/TDO2 dual inhibitor, AT-0174. Dual inhibition of IDO1/TDO2 in CR mice suppressed tumor growth to a greater degree than IDO1 inhibition alone. Significant enhancement in NKG2D frequency on NK and CD8+ T cells and a reduction in Tregs and MDSCs were observed following AT-1074 treatment. PD-L1 (programmed death-ligand-1) expression was increased in CR cells; therefore, we assessed dual inhibition + PD1 (programmed cell death protein-1) blocking and report profound anti-tumor growth and improved immunity in CR tumors which in turn extended overall survival in mice. CONCLUSION Our study reports the presence of platinum-resistant lung tumors that utilize both IDO1/TDO2 enzymes for survival, and to escape immune surveillance as a consequence of KYN metabolites. We also report early in vivo data in support of the potential therapeutic efficacy of the dual IDO1/TDO2 inhibitor AT-0174 as a part of immuno-therapeutic treatment that disrupts tumor metabolism and enhances anti-tumor immunity.
Collapse
Affiliation(s)
- Chunjing Wu
- Department of Veterans Affairs, Miami VA Healthcare System, Miami, FL, USA
| | - Sydney A Spector
- Department of Veterans Affairs, Miami VA Healthcare System, Miami, FL, USA
| | | | - Dan J M Nguyen
- Department of Veterans Affairs, Miami VA Healthcare System, Miami, FL, USA
| | - Emily Y Kim
- Department of Veterans Affairs, Miami VA Healthcare System, Miami, FL, USA
| | - Ashley Garcia
- Department of Veterans Affairs, Miami VA Healthcare System, Miami, FL, USA
| | - Niramol Savaraj
- Department of Veterans Affairs, Miami VA Healthcare System, Miami, FL, USA
- Department of Medicine, University of Miami School of Medicine, Miami, FL, USA
| | - Diane C Lim
- Department of Veterans Affairs, Miami VA Healthcare System, Miami, FL, USA
- Department of Medicine, University of Miami School of Medicine, Miami, FL, USA
| | - Ankita Paul
- Department of Electrical and Computer Engineering, Drexel University, Philadelphia, PA, USA
| | - Lynn G Feun
- Department of Medicine, University of Miami School of Medicine, Miami, FL, USA
| | | | - Medhi Wangpaichitr
- Department of Veterans Affairs, Miami VA Healthcare System, Miami, FL, USA.
- Department of Surgery, University of Miami School of Medicine, Miami, FL, USA.
| |
Collapse
|
4
|
Bioinformatic Analysis Identifies of Potential miRNA-mRNA Regulatory Networks Involved in the Pathogenesis of Lung Cancer. COMPUTATIONAL INTELLIGENCE AND NEUROSCIENCE 2022; 2022:6295934. [PMID: 36211008 PMCID: PMC9546656 DOI: 10.1155/2022/6295934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 09/16/2022] [Indexed: 11/18/2022]
Abstract
Objective. The purpose of the present study was to explore the biomarkers related to lung cancer based on the bioinformatics method, which might be new targets for lung cancer treatment. Methods. GSE17681 and GSE18842 were obtained from the Gene Expression Omnibus (GEO) database. The differentially expressed miRNAs (DEMs) and genes (DEGs) in lung cancer samples were screened via the GEO2R online tool. DEMs were submitted to the mirDIP website to predict target genes. Gene Ontology (GO) analysis and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis were conducted via uploading DEGs to the DAVID database. The protein-protein interaction network (PPI) of the DEGs was analyzed by STRING’s online tool. Then, the PPI network was visualized using Cytoscape 3.8.0. Results. 46 DEMs were identified in GSE17681, and the website predicted that there were 873 target genes of these DEMs. 1029 DEGs were identified in the GSE18842 chip. GO analysis suggested that the co-DEGs participated in the canonical Wnt signaling pathway, regulation of the Wnt signaling pathway, a serine/threonine kinase signaling pathway, the Wnt signaling pathway, and cell-cell signaling by Wnt. KEGG analysis results showed the co-DEGs of GSE17681 and GSE18842 were related to the Hippo signaling pathway and adhesion molecules. In addition, six hub genes that were related to lung cancer were identified as hub genes, including mTOR, NF1, CHD7, ETS1, IL-6, and COL1A1. Conclusions. The present study identified six hub genes that were related to lung cancer, including mTOR, NF1, CHD7, ETS1, IL-6, and COL1A1, which might be a potential target for lung cancer.
Collapse
|
5
|
Fabbri L, Chakraborty A, Robert C, Vagner S. The plasticity of mRNA translation during cancer progression and therapy resistance. Nat Rev Cancer 2021; 21:558-577. [PMID: 34341537 DOI: 10.1038/s41568-021-00380-y] [Citation(s) in RCA: 100] [Impact Index Per Article: 33.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/14/2021] [Indexed: 02/07/2023]
Abstract
Translational control of mRNAs during gene expression allows cells to promptly and dynamically adapt to a variety of stimuli, including in neoplasia in response to aberrant oncogenic signalling (for example, PI3K-AKT-mTOR, RAS-MAPK and MYC) and microenvironmental stress such as low oxygen and nutrient supply. Such translational rewiring allows rapid, specific changes in the cell proteome that shape specific cancer phenotypes to promote cancer onset, progression and resistance to anticancer therapies. In this Review, we illustrate the plasticity of mRNA translation. We first highlight the diverse mechanisms by which it is regulated, including by translation factors (for example, eukaryotic initiation factor 4F (eIF4F) and eIF2), RNA-binding proteins, tRNAs and ribosomal RNAs that are modulated in response to aberrant intracellular pathways or microenvironmental stress. We then describe how translational control can influence tumour behaviour by impacting on the phenotypic plasticity of cancer cells as well as on components of the tumour microenvironment. Finally, we highlight the role of mRNA translation in the cellular response to anticancer therapies and its promise as a key therapeutic target.
Collapse
Affiliation(s)
- Lucilla Fabbri
- Institut Curie, PSL Research University, CNRS UMR3348, INSERM U1278, Orsay, France
- Université Paris Sud, Université Paris-Saclay, CNRS UMR3348, INSERM U1278, Orsay, France
- Equipe Labellisée Ligue Nationale Contre le Cancer, Orsay, France
| | - Alina Chakraborty
- Institut Curie, PSL Research University, CNRS UMR3348, INSERM U1278, Orsay, France
- Université Paris Sud, Université Paris-Saclay, CNRS UMR3348, INSERM U1278, Orsay, France
- Equipe Labellisée Ligue Nationale Contre le Cancer, Orsay, France
| | - Caroline Robert
- INSERM U981, Gustave Roussy Cancer Campus, Villejuif, France
- Université Paris-Sud, Université Paris-Saclay, Kremlin-Bicêtre, France
- Dermato-Oncology, Gustave Roussy Cancer Campus, Villejuif, France
| | - Stéphan Vagner
- Institut Curie, PSL Research University, CNRS UMR3348, INSERM U1278, Orsay, France.
- Université Paris Sud, Université Paris-Saclay, CNRS UMR3348, INSERM U1278, Orsay, France.
- Equipe Labellisée Ligue Nationale Contre le Cancer, Orsay, France.
- Dermato-Oncology, Gustave Roussy Cancer Campus, Villejuif, France.
| |
Collapse
|
6
|
Hou Z, Wang Y, Xia N, Lv T, Yuan X, Song Y. Pseudogene KRT17P3 drives cisplatin resistance of human NSCLC cells by modulating miR-497-5p/mTOR. Cancer Sci 2020; 112:275-286. [PMID: 33179318 PMCID: PMC7780050 DOI: 10.1111/cas.14733] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 10/28/2020] [Accepted: 11/09/2020] [Indexed: 12/24/2022] Open
Abstract
Chemoresistance is a major obstacle in non–small cell lung cancer (NSCLC) treatment. The pseudogene keratin 17 pseudogene 3 (KRT17P3) has been previously shown to be upregulated in lung cancer tissues of patients with cisplatin resistance. In the present study, RT‐qPCR was performed to evaluate KRT17P3 levels in plasma samples collected from 30 cisplatin‐resistant and 32 cisplatin‐sensitive patients. We found that the plasma level of KRT17P3 is upregulated in cisplatin‐resistant patients, and the increased expression of plasma KRT17P3 is associated with poor chemotherapy response. Functional studies demonstrated that KRT17P3 overexpression in cultured NSCLC cells increases cell viability and decreases apoptosis upon cisplatin treatment in vitro and in vivo, while KRT17P3 knockdown has the opposite effect. Mechanistically, bioinformatics analysis, RNA immunoprecipitation, and dual luciferase reporter assay indicated that KRT17P3 acts as a molecular sponge for miR‐497‐5p and relieves the binding of miR‐497‐5p to its target gene mTOR. Rescue experiments validated the functional interaction between KRT17P3, miR‐497‐5p, and mTOR. Taken together, our findings indicate that KRT17P3/miR‐497‐5p/mTOR regulates the chemosensitivity of NSCLC, suggesting a potential therapeutic target for cisplatin‐resistant NSCLC patients. KRT17P3 may be a potential peripheral blood marker of NSCLC patients resistant to cisplatin.
Collapse
Affiliation(s)
- Zhibo Hou
- Department of Respiratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing, China.,Nanjing University Institute of Respiratory Medicine, Nanjing, China.,Department of Respiratory Medicine, Nanjing Brain Hospital, Nanjing Medical University, Nanjing, China
| | - Yi Wang
- Department of Anatomy, Histology and Embryology, Nanjing Medical University, Nanjing, China.,Key Laboratory for Aging and Disease, Nanjing Medical University, Nanjing, China
| | - Ning Xia
- Department of Respiratory Medicine, Nanjing Brain Hospital, Nanjing Medical University, Nanjing, China
| | - Tangfeng Lv
- Department of Respiratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing, China.,Nanjing University Institute of Respiratory Medicine, Nanjing, China
| | - Xiaoqin Yuan
- Department of Anatomy, Histology and Embryology, Nanjing Medical University, Nanjing, China.,Key Laboratory for Aging and Disease, Nanjing Medical University, Nanjing, China
| | - Yong Song
- Department of Respiratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing, China.,Nanjing University Institute of Respiratory Medicine, Nanjing, China
| |
Collapse
|
7
|
Sayed A, Munir M, Eweis N, Wael D, Shazly O, Awad AK, Elbadawy MA, Eissa S. An overview on precision therapy in bladder cancer. EXPERT REVIEW OF PRECISION MEDICINE AND DRUG DEVELOPMENT 2020. [DOI: 10.1080/23808993.2020.1801346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Ahmed Sayed
- Faculty of Medicine, Undergraduate Medical Students, Ain Shams University, Cairo, Egypt
| | - Malak Munir
- Faculty of Medicine, Undergraduate Medical Students, Ain Shams University, Cairo, Egypt
| | - Noor Eweis
- Faculty of Medicine, Undergraduate Medical Students, Ain Shams University, Cairo, Egypt
| | - Doaa Wael
- Faculty of Medicine, Undergraduate Medical Students, Ain Shams University, Cairo, Egypt
| | - Omar Shazly
- Faculty of Medicine, Undergraduate Medical Students, Ain Shams University, Cairo, Egypt
| | - Ahmed K. Awad
- Faculty of Medicine, Undergraduate Medical Students, Ain Shams University, Cairo, Egypt
| | - Marihan A. Elbadawy
- Faculty of Medicine, Undergraduate Medical Students, Ain Shams University, Cairo, Egypt
| | - Sanaa Eissa
- Faculty of Medicine, Professor of Medical Biochemistry and Molecular Biology, Ain Shams University, Cairo, Egypt
| |
Collapse
|
8
|
Fu J, Zhou H, Chen J, Wang Y. Low expression of PRKCDBP promoted cisplatin resistance in lung adenocarcinoma by DNMT1 and TNF‑α. Oncol Rep 2020; 44:1616-1626. [PMID: 32945503 PMCID: PMC7448504 DOI: 10.3892/or.2020.7721] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 07/09/2020] [Indexed: 12/15/2022] Open
Abstract
The aim of the present study was to explore the mechanism of protein kinase C delta binding protein (PRKCDBP) promoting cisplatin resistance in lung adenocarcinoma (LAD). The PRKCDBP expression level was herein detected by reverse transcription-quantitative polymerase chain reaction (RT-qPCR). We overexpressed PRKCDBP and tumor necrosis factor-α (TNF-α) in A549/DDP cell line, DNMT1 in A549 cells and siRNA TNF-α in A549 cells with lentivirus-mediated technique, and then, analyzed their biological diversification. The results showed a significantly lower expression level of PRKCDBP was lowly expressed in the A549/DDP cell line and LAD tissues than that in A549 cells and adjacent cancer tissues (P<0.05 and P<0.01), while the DNMT1 mRNA level was remarkably increased (P=0.000) and the promoter of PRKCDBP was hypermethylated in the A549/DDP cell line. Additionally, DNMT1 mRNA level in cisplatin-insensitive group was markedly higher than that in cisplatin-sensitive group (t=7.233, P<0.0001), while PRKCDBP mRNA level in cisplatin insensitive group was notably lower than that in cisplatin-sensitive group (t=8.784, P<0.0001). The results showed that PRKCDBP mRNA level was significantly elevated following treatment with 5 µM decitabine for 24 h (P<0.0001), while the DNMT1 mRNA level was notably reduced (P=0.000). When PRKCDBP was overexpressed, the DNMT1 mRNA level was markedly decreased (P=0.007), the rate of proliferation (P<0.05 or P<0.01), IC50 of cisplatin (P<0.001), G2/M phase and S phase cells were obviously reduced (P<0.001), while G0/G1 phase cells, apoptosis (P<0.001) distinctly increased, but migration ability did not significantly change. TNF-α overexpression resulted in an increase of PRKCDBP mRNA level (P<0.001), while TNF-α siRNA led to PRKCDBP mRNA level distinctly reduced (P<0.001). Overexpression of DNMT1 improved IC50 in A549 cells. Thus, findings of the present study ascertained the promoter of PRKCDBP was hypermethylated in A549/DDP cells. In conclusion, low expression of PRKCDBP promoted cisplatin resistance in LAD by DNMT1 and TNF-α.
Collapse
Affiliation(s)
- Jiali Fu
- Department of Laboratory Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Huixin Zhou
- Department of Laboratory Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Jie Chen
- Department of Intensive Care Unit, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Yumin Wang
- Department of Laboratory Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| |
Collapse
|
9
|
Kim HJ, Gong MK, Yoon CY, Kang J, Yun M, Cho NH, Rha SY, Choi YD. Synergistic Antitumor Effects of Combined Treatment with HSP90 Inhibitor and PI3K/mTOR Dual Inhibitor in Cisplatin-Resistant Human Bladder Cancer Cells. Yonsei Med J 2020; 61:587-596. [PMID: 32608202 PMCID: PMC7329736 DOI: 10.3349/ymj.2020.61.7.587] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 05/14/2020] [Accepted: 05/21/2020] [Indexed: 01/21/2023] Open
Abstract
PURPOSE The current study aimed to investigate the synergistic antitumor effect of combined treatment with 17-DMAG (HSP90 inhibitor) and NVP-BEZ235 (PI3K/mTOR dual inhibitor) on cisplatin-resistant human bladder cancer cells. MATERIALS AND METHODS Human bladder cancer cells exhibiting cisplatin resistance (T24R2) were exposed to escalating doses of 17-DMAG (2.5-20 nM) with or without NVP-BEZ236 (0.5-4 μM) in combination with cisplatin. Antitumor effects were assessed by CCK-8 analysis. Based on the dose-response study, synergistic interactions between the two regimens were evaluated using clonogenic assay and combination index values. Flow cytometry and Western blot were conducted to analyze mechanisms of synergism. RESULTS Dose- and time-dependent antitumor effects for 17-DMAG were observed in both cisplatin-sensitive (T24) and cisplatin-resistant cells (T24R2). The antitumor effect of NVP-BEZ235, however, was found to be self-limiting. The combination of 17-DMAG and NVP-BEZ235 in a 1:200 fixed ratio showed a significant antitumor effect in cisplatin-resistant bladder cancer cells over a wide dose range, and clonogenic assay showed compatible results with synergy tests. Three-dimensional analysis revealed strong synergy between the two drugs with a synergy volume of 201.84 μM/mL²%. The combination therapy resulted in G1-phase cell cycle arrest and caspase-dependent apoptosis confirmed by the Western blot. CONCLUSION HSP90 inhibitor monotherapy and in combination with the PI3K/mTOR survival pathway inhibitor NVP-BEZ235 shows a synergistic antitumor effect in cisplatin-resistant bladder cancers, eliciting cell cycle arrest at the G1 phase and induction of caspase-dependent apoptotic pathway.
Collapse
Affiliation(s)
- Hyung Joon Kim
- Department of Urology, Myunggok Medical Research Institute, Konyang University College of Medicine, Daejeon, Korea
- Department of Medicine, Graduate School of Yonsei University College of Medicine, Seoul, Korea
| | - Mi Kyung Gong
- School of Dentistry, Pusan National University, Yangsan, Korea
- Department of Urology, Urological Science Institute, Yonsei University College of Medicine, Seoul, Korea
| | - Cheol Yong Yoon
- Department of Urology, Urological Science Institute, Yonsei University College of Medicine, Seoul, Korea
| | - Jaeku Kang
- Department of Pharmacology, College of Medicine, Konyang University, Daejeon, Korea
| | - Mijin Yun
- Department of Medicine, Graduate School of Yonsei University College of Medicine, Seoul, Korea
- Department of Nuclear Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Nam Hoon Cho
- Department of Medicine, Graduate School of Yonsei University College of Medicine, Seoul, Korea
- Department of Pathology, Yonsei University College of Medicine, Seoul, Korea
| | - Sun Young Rha
- Department of Medicine, Graduate School of Yonsei University College of Medicine, Seoul, Korea
- Division of Medical Oncology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Young Deuk Choi
- Department of Medicine, Graduate School of Yonsei University College of Medicine, Seoul, Korea
- Department of Urology, Urological Science Institute, Yonsei University College of Medicine, Seoul, Korea.
| |
Collapse
|
10
|
lncRNA RP11-838N2.3 Promoted Cisplatin Resistance in Lung Adenocarcinoma. BIOMED RESEARCH INTERNATIONAL 2020; 2020:2806042. [PMID: 32626737 PMCID: PMC7312708 DOI: 10.1155/2020/2806042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 05/07/2020] [Accepted: 05/13/2020] [Indexed: 11/30/2022]
Abstract
The mechanism of RP11-838N2.3 promoting cisplatin resistance in lung adenocarcinoma (LAD) was unclear. The RP11-838N2.3 expression level in cells and LAD tissues was detected by qPCR. We constructed lentivirus-mediated GV303 overexpression and GV248 shRNA vector targeting RP11-838N2.3, then infected A549 and A549/DDP cell and furtherly analyzed cell biology. High-throughput gene chip analysis showed that RP11-838N2.3 was significantly upregulated in A549/DDP (change fold = 66.056595). The qPCR results showed that the expression level of RP11-838N2.3 in A549/DDP cell was significantly higher than that in A549 cells (P < 0.05), and the expression level of RP11-838N2.3 in LAD tissues was also significantly higher than that in adjacent tissues (P < 0.05). The expression level of RP11-838N2.3 in cisplatin-insensitive LAD tissues was also significantly higher than that in cisplatin-sensitive LAD tissues (P < 0.05). Survival analysis showed that OS (overall survival) and DFS (progression-free survival) of high RP11-838N2.3 expression in the cisplatin-sensitive or cisplatin-insensitive LAD group were lower (P < 0.001 and P < 0.001) than those of low RP11-838N2.3 expression in the cisplatin-sensitive or cisplatin-insensitive LAD group. CCK8 showed that the OD450 value of RP11-838N2.3 overexpression increased significantly at 24 h, 48 h, and 72 h after transfection, while the knockdown of RP11-838N2.3 caused OD450 value at 24 h, 48 h, and 72 h after transfection significantly reduced, under the action of cisplatin that had the same trend (P < 0.05). The cell migration showed that the RP11-838N2.3 overexpression increased significantly migration activity and RP11-838N2.3 knockdown inhibited migration activity at 24 h, 48 h, and 72 h after transfection. The same trend was also observed under the action of cisplatin (P < 0.05). The cell invasion showed that the invasion rate of RP11-838N2.3 overexpression increased significantly, while the invasion rate of RP11-838N2.3 knockdown decreased significantly, and the same trend was observed under the action of cisplatin (P < 0.05). Apoptosis results showed that the apoptosis rate of RP11-838N2.3 overexpressed cells decreased significantly and the apoptosis rate of RP11-838N2.3 knockdown cells increased significantly, and the same trend was also observed under the action of cisplatin (P < 0.05). However, the results of cell cycle showed that there was no significant difference in the proportion of cells in each phase of the cell cycle after RP11-838N2.3 overexpression or knockdown (P > 0.05).RP11-838N2.3 was significantly upregulated in cisplatin-resistant cell and tissues of LAD. RP11-838N2.3 could enhance the proliferation, migration, and invasion and inhibit apoptosis of LAD cisplatin-resistant cell. So RP11-838N2.3 could enhance the cisplatin resistance of LAD cells and was a resistant lncRNA molecule.
Collapse
|
11
|
Zhou H, Shen Q, Fu J, Jiang F, Wang L, Wang Y. Analysis of lncRNA UCA1-related downstream pathways and molecules of cisplatin resistance in lung adenocarcinoma. J Clin Lab Anal 2020; 34:e23312. [PMID: 32249461 PMCID: PMC7439354 DOI: 10.1002/jcla.23312] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 02/28/2020] [Accepted: 03/02/2020] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND To analyze the lncRNA UCA1-related downstream pathways and molecules of cisplatin resistance in lung adenocarcinoma. METHODS We constructed overexpression and siRNA vectors targeting UCA1 and TXNIP and then used next-generation sequencing to compare the UCA1 overexpression and negative control from A549 cell. RESULTS It shown that 647 upregulated mRNAs and 633 downregulated differentially expressed mRNAs-related UCA1, and the top ten upregulated mRNAs were CPD, AC007192.1, TGOLN2, LGR4, TFPI, CYP1B1, TOMM6, HLA-B, SLC35F6, and TOP2A, and top ten downregulated mRNAs were TXNIP, SESN2, STC2, HSPA1A, MMP10, CHAC1, DNAJB1, AC004922.1, ATF3, and GABARAPL1. We found TXNIP mRNA expression level was the most significantly downexpressed mRNA. TXNIP mRNA expression level of LAD tissues was clearly lower than the adjacent tissues. UCA1 expression level of cisplatin insensitive group was markedly higher than that of cisplatin-sensitive group, while TXNIP mRNA expression level of cisplatin insensitive group was clearly lower than that of cisplatin-sensitive group. Compared to the BEAS-2B, TXNIP mRNA expression level cut down in A549 and A549/DDP cell and that of A549/DDP cell was lower than A549 cell. After UCA1 overexpression, TXNIP mRNA obviously decreased, while proliferation ability and IC50 of A549 heightened. After knocking down UCA1, TXNIP mRNA was significantly increased, while proliferation ability and IC50 of A549/DDP lowered. PPI analysis result showed that TXNIP could interact with multiple proteins such as TXN, DDIT4, and NLRP3. CONCLUSION UCA1 promoted cisplatin resistance by downregulating TXNIP expression in LAD, and TXNIP could interact with multiple proteins. So, UCA1/TXNIP axis might affect cisplatin resistance in LAD.
Collapse
Affiliation(s)
- Huixin Zhou
- Department of Laboratory Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Qiang Shen
- Department of Respiratory, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Jiali Fu
- Department of Laboratory Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Feng Jiang
- Department of Laboratory Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Liangxing Wang
- Department of Respiratory, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Yumin Wang
- Department of Laboratory Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| |
Collapse
|
12
|
Xie Y, Li S, Zhou L, Lin H, Jiao X, Qiu Q, Liang Y, Zhang Q. Rapamycin preserves the primordial follicle pool during cisplatin treatment in vitro and in vivo. Mol Reprod Dev 2020; 87:442-453. [PMID: 32112509 DOI: 10.1002/mrd.23330] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 01/16/2020] [Indexed: 12/22/2022]
Abstract
Rapamycin has been proven to effectively inhibit the activation of primordial follicles while cisplatin-induced the loss of primordial follicles due to the over-activation of the primordial follicle stockpile. Whether rapamycin could inhibit the loss of primordial follicles induced by cisplatin is still unknown. The ovaries of neonatal Sprague Dawley rats were cultured in vitro in different doses of rapamycin (0.08, 0.16, and 0.32 μg/ml) and cisplatin (0.1, 0.4, and 0.8 μg/ml). The immature BALB/c mice were administered cisplatin with or without rapamycin by intraperitoneal injection. Ovaries were collected to analyze the histomorphology, the messenger RNA (mRNA) expression of anti-Mullerian hormone (AMH), growth differentiation factor 9 (GDF9), and bone morphogenetic protein 15 (BMP15) and the expression of key proteins of mammalian target of rapamycin (mTOR) pathway. Growing follicle counts of ovaries cultured in vitro in the R0.16 and R0.32 groups were decreased and the ratio of growing to primordial follicles was also decreased in a dose-dependent manner. In the C0.8 group, growing follicles were decreased compared with the other groups while the ratio was substantially increased in the C0.4 and C0.8 group. Co-treatment attenuated primordial follicle loss and reduced the upregulated ratio induced by cisplatin. Ovarian follicle dynamics in vivo was consistent with the in vitro results. Primordial follicles counts were statistically increased and the ratio was reduced in the rapamycin group compared with the control group. Primordial follicle counts were dramatically reduced in the cisplatin group whereas co-treatment with rapamycin slightly recovered its counts. There was no obvious difference in the number of growing follicles between the cisplatin group and other groups. The ratio was significantly increased in cisplatin-treated mice whereas decreased in the co-treatment group. The apoptosis rate of antral follicles in cisplatin-treated mice was higher than the other groups while the apoptosis rate was decreased in the co-treatment group in vivo. Compared with the control and rapamycin group, the mRNA expression of AMH, GDF9, and BMP15 were downregulated in the cisplatin group. The co-treatment group recovered the mRNA expression of BMP15. In addition, the expression of key protein of mTOR pathway rpS6 and its phosphorylated forms were increased in the cisplatin-treated group while co-treatment decreased their expression. Rapamycin attenuated the loss of primordial follicles induced by cisplatin through the inhibitory effect of rapamycin on the mTOR pathway. These results suggest that rapamycin may be an effective drug for the protection of ovarian function during chemotherapy.
Collapse
Affiliation(s)
- Yanqiu Xie
- Department of Reproductive Medicine Center, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Gongdong, China.,Department of Obstetrics and Gynecology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Gongdong, China
| | - Song Li
- Department of Reproductive Medicine Center, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Gongdong, China
| | - Linyan Zhou
- Department of Reproductive Medicine Center, Shenzhen Zhongshan Urology Hospital, Shenzhen, Gongdong, China
| | - Haiyan Lin
- Department of Reproductive Medicine Center, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Gongdong, China
| | - Xuedan Jiao
- Department of Reproductive Medicine Center, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Gongdong, China
| | - Qi Qiu
- Department of Reproductive Medicine Center, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Gongdong, China
| | - Yihua Liang
- Department of Reproductive Medicine Center, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Gongdong, China
| | - Qingxue Zhang
- Department of Reproductive Medicine Center, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Gongdong, China
| |
Collapse
|
13
|
Costea T, Vlad OC, Miclea LC, Ganea C, Szöllősi J, Mocanu MM. Alleviation of Multidrug Resistance by Flavonoid and Non-Flavonoid Compounds in Breast, Lung, Colorectal and Prostate Cancer. Int J Mol Sci 2020; 21:E401. [PMID: 31936346 PMCID: PMC7013436 DOI: 10.3390/ijms21020401] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 01/03/2020] [Accepted: 01/03/2020] [Indexed: 12/12/2022] Open
Abstract
The aim of the manuscript is to discuss the influence of plant polyphenols in overcoming multidrug resistance in four types of solid cancers (breast, colorectal, lung and prostate cancer). Effective treatment requires the use of multiple toxic chemotherapeutic drugs with different properties and targets. However, a major cause of cancer treatment failure and metastasis is the development of multidrug resistance. Potential mechanisms of multidrug resistance include increase of drug efflux, drug inactivation, detoxification mechanisms, modification of drug target, inhibition of cell death, involvement of cancer stem cells, dysregulation of miRNAs activity, epigenetic variations, imbalance of DNA damage/repair processes, tumor heterogeneity, tumor microenvironment, epithelial to mesenchymal transition and modulation of reactive oxygen species. Taking into consideration that synthetic multidrug resistance agents have failed to demonstrate significant survival benefits in patients with different types of cancer, recent research have focused on beneficial effects of natural compounds. Several phenolic compounds (flavones, phenolcarboxylic acids, ellagitannins, stilbens, lignans, curcumin, etc.) act as chemopreventive agents due to their antioxidant capacity, inhibition of proliferation, survival, angiogenesis, and metastasis, modulation of immune and inflammatory responses or inactivation of pro-carcinogens. Moreover, preclinical and clinical studies revealed that these compounds prevent multidrug resistance in cancer by modulating different pathways. Additional research is needed regarding the role of phenolic compounds in the prevention of multidrug resistance in different types of cancer.
Collapse
Affiliation(s)
- Teodora Costea
- Department of Pharmacognosy, Phytochemistry and Phytotherapy, “Carol Davila” University of Medicine and Pharmacy, 020021 Bucharest, Romania;
| | - Oana Cezara Vlad
- Department of Biophysics, “Carol Davila” University of Medicine and Pharmacy, 020021 Bucharest, Romania; (O.C.V.); (C.G.)
| | - Luminita-Claudia Miclea
- Department of Biophysics and Cellular Biotechnology, “Carol Davila” University of Medicine and Pharmacy, 020021 Bucharest, Romania;
- Research Excellence Center in Biophysics and Cellular Biotechnology, “Carol Davila” University of Medicine and Pharmacy, 020021 Bucharest, Romania
| | - Constanta Ganea
- Department of Biophysics, “Carol Davila” University of Medicine and Pharmacy, 020021 Bucharest, Romania; (O.C.V.); (C.G.)
| | - János Szöllősi
- Department of Biophysics and Cell Biology, Faculty of Medicine, University of Debrecen, 4032 Debrecen, Hungary;
- MTA-DE Cell Biology and Signaling Research Group, Faculty of Medicine, University of Debrecen, 4032 Debrecen, Hungary
| | - Maria-Magdalena Mocanu
- Department of Biophysics, “Carol Davila” University of Medicine and Pharmacy, 020021 Bucharest, Romania; (O.C.V.); (C.G.)
| |
Collapse
|
14
|
Aspirin enhances cisplatin sensitivity of resistant non-small cell lung carcinoma stem-like cells by targeting mTOR-Akt axis to repress migration. Sci Rep 2019; 9:16913. [PMID: 31729456 PMCID: PMC6858356 DOI: 10.1038/s41598-019-53134-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 10/24/2019] [Indexed: 12/20/2022] Open
Abstract
Conventional chemotherapeutic regimens are unable to prevent metastasis of non-small cell lung carcinoma (NSCLC) thereby leaving cancer incurable. Cancer stem cells (CSCs) are considered to be the origin of this therapeutic limitation. In the present study we report that the migration potential of NSCLCs is linked to its CSC content. While cisplatin alone fails to inhibit the migration of CSC-enriched NSCLC spheroids, in a combination with non-steroidal anti inflammatory drug (NSAID) aspirin retards the same. A search for the underlying mechanism revealed that aspirin pre-treatment abrogates p300 binding both at TATA-box and initiator (INR) regions of mTOR promoter of CSCs, thereby impeding RNA polymerase II binding at those sites and repressing mTOR gene transcription. As a consequence of mTOR down-regulation, Akt is deactivated via dephosphorylation at Ser473 residue thereby activating Gsk3β that in turn causes destabilization of Snail and β-catenin, thus reverting epithelial to mesenchymal transition (EMT). However, alone aspirin fails to hinder migration since it does not inhibit the Integrin/Fak pathway, which is highly activated in NSCLC stem cells. On the other hand, in aspirin pre-treated CSCs, cisplatin stalls migration by hindering the integrin pathway. These results signify the efficacy of aspirin in sensitizing NSCLC stem cells towards the anti-migration effect of cisplatin. Cumulatively, our findings raise the possibility that aspirin might emerge as a promising drug in combinatorial therapy with the existing chemotherapeutic agents that fail to impede migration of NSCLC stem cells otherwise. This may consequently lead to the advancement of remedial outcome for the metastatic NSCLCs.
Collapse
|
15
|
Nguyen DJM, Theodoropoulos G, Li YY, Wu C, Sha W, Feun LG, Lampidis TJ, Savaraj N, Wangpaichitr M. Targeting the Kynurenine Pathway for the Treatment of Cisplatin-Resistant Lung Cancer. Mol Cancer Res 2019; 18:105-117. [PMID: 31628200 DOI: 10.1158/1541-7786.mcr-19-0239] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 07/09/2019] [Accepted: 10/15/2019] [Indexed: 01/02/2023]
Abstract
Cisplatin resistance is a major barrier in the effective treatment of lung cancer. Cisplatin-resistant (CR) lung cancer cells do not primarily use glucose but rather consume amino acids such as glutamine and tryptophan (Trp) for survival. CR cells activate the kynurenine (KYN) pathway (KP) to cope with excessive reactive oxygen species (ROS) and maintain homeostasis for growth and proliferation. Consequently, indoleamine 2,3-dioxygenase-1 (IDO1) becomes an essential enzyme for CR cells' survival because it initiates and regulates the first step in the KP. Increased IDO1 activities and ROS levels are found in CR cells versus cisplatin-sensitive lung cancer. Importantly, significantly greater KYN/Trp ratio (P = 0.005) is detected in serum of patients who fail cisplatin when compared with naïve treatment. Knocking down IDO1 using shRNA or IDO1 inhibitors heightens ROS levels and results in a significant growth inhibitory effect only on CR cells and not on cisplatin-sensitive cells. Exposing CR cells to antioxidant (TIRON) results in suppression of IDO1 activity and confers resistance to IDO1 inhibition, indicating an interrelationship between ROS and IDO1. Because KYN plays a critical role in reprogramming naïve T cells to the immune-suppressive regulatory T-cell (T-reg) phenotype, we observed higher expression of TGFβ, FoxP3, and CD4+CD25+ in mice bearing CR tumors compared with tumors from cisplatin-sensitive counterparts. IMPLICATIONS: Findings suggest that the enzyme-inhibitory activity and antitumor efficacy of IDO1 inhibitors rely in part on ROS levels, arguing that IDO1 expression alone may be insufficient to determine the clinical benefits for this class of experimental cancer drugs. Importantly, IDO1 inhibitors may be more suitable to treat patients with lung cancer who failed cisplatin therapy than naïve treatment patients.
Collapse
Affiliation(s)
- Dan J M Nguyen
- Department of Veterans Affairs, Miami VA Healthcare System, Research Service, Miami, Florida
| | - George Theodoropoulos
- Department of Veterans Affairs, Miami VA Healthcare System, Research Service, Miami, Florida
| | - Ying-Ying Li
- Department of Veterans Affairs, Miami VA Healthcare System, Research Service, Miami, Florida
| | - Chunjing Wu
- Department of Veterans Affairs, Miami VA Healthcare System, Research Service, Miami, Florida
| | - Wei Sha
- Department of Veterans Affairs, Miami VA Healthcare System, Research Service, Miami, Florida
| | - Lynn G Feun
- Department of Medicine, Hematology/Oncology, Miller School of Medicine, University of Miami, Miami, Florida
| | - Theodore J Lampidis
- Department of Cell Biology, Miller School of Medicine, University of Miami, Miami, Florida
| | - Niramol Savaraj
- Department of Veterans Affairs, Miami VA Healthcare System, Research Service, Miami, Florida. .,Department of Medicine, Hematology/Oncology, Miller School of Medicine, University of Miami, Miami, Florida
| | - Medhi Wangpaichitr
- Department of Veterans Affairs, Miami VA Healthcare System, Research Service, Miami, Florida. .,Department of Surgery, Cardiothoracic Surgery, Miller School of Medicine, University of Miami, Miami, Florida
| |
Collapse
|
16
|
Nam KH, Yi SA, Nam G, Noh JS, Park JW, Lee MG, Park JH, Oh H, Lee J, Lee KR, Park HJ, Lee J, Han JW. Identification of a novel S6K1 inhibitor, rosmarinic acid methyl ester, for treating cisplatin-resistant cervical cancer. BMC Cancer 2019; 19:773. [PMID: 31387554 PMCID: PMC6683399 DOI: 10.1186/s12885-019-5997-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Accepted: 07/30/2019] [Indexed: 02/07/2023] Open
Abstract
Background The mTOR/S6K1 signaling pathway is often activated in cervical cancer, and thus considered a molecular target for cervical cancer therapies. Inhibiting mTOR is cytotoxic to cervical cancer cells and creates a synergistic anti-tumor effect with conventional chemotherapy agents. In this study, we identified a novel S6K1 inhibitor, rosmarinic acid methyl ester (RAME) for the use of therapeutic agent against cervical cancer. Methods Combined structure- and ligand-based virtual screening was employed to identify novel S6K1 inhibitors among the in house natural product library. In vitro kinase assay and immunoblot assay was used to examine the effects of RAME on S6K1 signaling pathway. Lipidation of LC3 and mRNA levels of ATG genes were observed to investigate RAME-mediated autophagy. PARP cleavage, mRNA levels of apoptotic genes, and cell survival was measured to examine RAME-mediated apoptosis. Results RAME was identified as a novel S6K1 inhibitor through the virtual screening. RAME, not rosmarinic acid, effectively reduced mTOR-mediated S6K1 activation and the kinase activity of S6K1 by blocking the interaction between S6K1 and mTOR. Treatment of cervical cancer cells with RAME promoted autophagy and apoptosis, decreasing cell survival rate. Furthermore, we observed that combination treatment with RAME and cisplatin greatly enhanced the anti-tumor effect in cisplatin-resistant cervical cancer cells, which was likely due to mTOR/S6K1 inhibition-mediated autophagy and apoptosis. Conclusions Our findings suggest that inhibition of S6K1 by RAME can induce autophagy and apoptosis in cervical cancer cells, and provide a potential option for cervical cancer treatment, particularly when combined with cisplatin. Electronic supplementary material The online version of this article (10.1186/s12885-019-5997-2) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Ki Hong Nam
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Sang Ah Yi
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Gibeom Nam
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Jae Sung Noh
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Jong Woo Park
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Min Gyu Lee
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Jee Hun Park
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Hwamok Oh
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Jieun Lee
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Kang Ro Lee
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Hyun-Ju Park
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Jaecheol Lee
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Jeung-Whan Han
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
| |
Collapse
|
17
|
Exploiting ROS and metabolic differences to kill cisplatin resistant lung cancer. Oncotarget 2018; 8:49275-49292. [PMID: 28525376 PMCID: PMC5564767 DOI: 10.18632/oncotarget.17568] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Accepted: 04/17/2017] [Indexed: 01/17/2023] Open
Abstract
Cisplatin resistance remains a major problem in the treatment of lung cancer. We have discovered that cisplatin resistant (CR) lung cancer cells, regardless of the signaling pathway status, share the common parameter which is an increase in reactive oxygen species (ROS) and undergo metabolic reprogramming. CR cells were no longer addicted to the glycolytic pathway, but rather relied on oxidative metabolism. They took up twice as much glutamine and were highly sensitive to glutamine deprivation. Glutamine is hydrolyzed to glutamate for glutathione synthesis, an essential factor to abrogate high ROS via xCT antiporter. Thus, blocking glutamate flux using riluzole (an amyotropic lateral sclerosis approved drug) can selectively kill CR cells in vitro and in vivo. However, we discovered here that glutathione suppression is not the primary pathway in eradicating the CR cells. Riluzole can lead to further decrease in NAD+ (nicotinamide adenine dinucleotide) and lactate dehydrogenase-A (LDHA) expressions which in turn further heightened oxidative stress in CR cells. LDHA knocked-down cells became hypersensitive to riluzole treatments and possessed increased levels of ROS. Addition of NAD+ re-stabilized LDHA and reversed riluzole induced cell death. Thus far, no drugs are available which could overcome cisplatin resistance or kill cisplatin resistant cells. CR cells possess high levels of ROS and undergo metabolic reprogramming. These metabolic adaptations can be exploited and targeted by riluzole. Riluzole may serve as a dual-targeting agent by suppression LDHA and blocking xCT antiporter. Repurposing of riluzole should be considered for future treatment of cisplatin resistant lung cancer patients.
Collapse
|
18
|
Scesa P, Wangpaichitr M, Savaraj N, West L, Roche SP. A Kinetic Dearomatization Strategy for an Expedient Biomimetic Route to the Bielschowskysin Skeleton. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201711780] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Paul Scesa
- Department of Chemistry & Biochemistry; Florida Atlantic University; 777 Glades Road Boca Raton FL 33431 USA
| | - Medhi Wangpaichitr
- University of Miami School of Medicine; 1475 NW 12 Ave Miami FL 33136 USA
| | - Niramol Savaraj
- University of Miami School of Medicine; 1475 NW 12 Ave Miami FL 33136 USA
| | - Lyndon West
- Department of Chemistry & Biochemistry; Florida Atlantic University; 777 Glades Road Boca Raton FL 33431 USA
| | - Stéphane P. Roche
- Department of Chemistry & Biochemistry; Florida Atlantic University; 777 Glades Road Boca Raton FL 33431 USA
| |
Collapse
|
19
|
Niu P, Shi D, Zhang S, Zhu Y, Zhou J. Cardamonin enhances the anti-proliferative effect of cisplatin on ovarian cancer. Oncol Lett 2018; 15:3991-3997. [PMID: 29456744 DOI: 10.3892/ol.2018.7743] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Accepted: 09/09/2017] [Indexed: 12/19/2022] Open
Abstract
The mammalian target of rapamycin (mTOR) is well-known as a promising therapeutic target in various cancer cells. mTOR activation decreases the sensitivity of ovarian cancer to cisplatin. Cardamonin inhibits the proliferation of various cancer cells by mTOR suppression. The present study examined whether cardamonin combined with cisplatin is efficacious for the anti-proliferation of ovarian cancer cells. The anti-proliferative effect was determined by MTT and cell cycle assays. Activation of the mTOR signal pathway and the expression of anti-apoptotic proteins were evaluated by western blot analysis. Cardamonin significantly enhanced the effects of cisplatin on cell proliferation and cell cycle progression. The expression of B cell lymphoma-2, X-linked inhibitor of apoptosis protein and Survivin was significantly decreased following combination treatment. Furthermore, the activation of mTOR and its downstream 70 kDa ribosomal protein S6 kinase was inhibited by cardamonin. These results demonstrated that the combinatorial effects of cardamonin and cisplatin on anti-proliferation were enhanced by suppressing the expression of anti-apoptotic proteins and activation of mTOR in ovarian cancer cells.
Collapse
Affiliation(s)
- Peiguang Niu
- Department of Pharmacy, Fujian Provincial Maternity and Children Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian 350001, P.R. China
| | - Daohua Shi
- Department of Pharmacy, Fujian Provincial Maternity and Children Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian 350001, P.R. China
| | - Shusheng Zhang
- Department of Pharmacy, Fujian Provincial Maternity and Children Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian 350001, P.R. China
| | - Yanting Zhu
- Department of Pharmacy, Fujian Provincial Maternity and Children Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian 350001, P.R. China
| | - Jintuo Zhou
- Department of Pharmacy, Fujian Provincial Maternity and Children Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian 350001, P.R. China
| |
Collapse
|
20
|
Scesa P, Wangpaichitr M, Savaraj N, West L, Roche SP. A Kinetic Dearomatization Strategy for an Expedient Biomimetic Route to the Bielschowskysin Skeleton. Angew Chem Int Ed Engl 2018; 57:1316-1321. [DOI: 10.1002/anie.201711780] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Indexed: 01/14/2023]
Affiliation(s)
- Paul Scesa
- Department of Chemistry & Biochemistry; Florida Atlantic University; 777 Glades Road Boca Raton FL 33431 USA
| | - Medhi Wangpaichitr
- University of Miami School of Medicine; 1475 NW 12 Ave Miami FL 33136 USA
| | - Niramol Savaraj
- University of Miami School of Medicine; 1475 NW 12 Ave Miami FL 33136 USA
| | - Lyndon West
- Department of Chemistry & Biochemistry; Florida Atlantic University; 777 Glades Road Boca Raton FL 33431 USA
| | - Stéphane P. Roche
- Department of Chemistry & Biochemistry; Florida Atlantic University; 777 Glades Road Boca Raton FL 33431 USA
| |
Collapse
|
21
|
Aberrant Long Noncoding RNAs Expression Profiles Affect Cisplatin Resistance in Lung Adenocarcinoma. BIOMED RESEARCH INTERNATIONAL 2017; 2017:7498151. [PMID: 29279851 PMCID: PMC5723956 DOI: 10.1155/2017/7498151] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 08/24/2017] [Accepted: 09/13/2017] [Indexed: 12/27/2022]
Abstract
Background Long noncoding RNAs (lncRNAs) have been shown to be involved in the mechanism of cisplatin resistance in lung adenocarcinoma (LAD). However, the roles of lncRNAs in cisplatin resistance in LAD are not well understood. Methods We used a high-throughput microarray to compare the lncRNA and mRNA expression profiles in cisplatin resistance cell A549/DDP and cisplatin sensitive cell A549. Several candidate cisplatin resistance-associated lncRNAs were verified by real-time quantitative reverse transcription polymerase chain reaction (PCR) analysis. Results We found that 1,543 lncRNAs and 1,713 mRNAs were differentially expressed in A549/DDP cell and A549 cell, hinting that many lncRNAs were irregular from cisplatin resistance in LAD. We also obtain the fact that 12 lncRNAs were aberrantly expressed in A549/DDP cell compared with A549 cell by quantitative PCR. Among these, UCA1 was the aberrantly expressed lncRNA and can significantly reduce the IC50 of cisplatin in A549/DDP cell after knockdown, while it can increase the IC50 of cisplatin after UCA1 was overexpressed in NCI-H1299. Conclusions We obtained patterns of irregular lncRNAs and they may play a key role in cisplatin resistance of LAD.
Collapse
|
22
|
Akeno N, Reece AL, Callahan M, Miller AL, Kim RG, He D, Lane A, Moulton JS, Wikenheiser-Brokamp KA. TRP53 Mutants Drive Neuroendocrine Lung Cancer Through Loss-of-Function Mechanisms with Gain-of-Function Effects on Chemotherapy Response. Mol Cancer Ther 2017; 16:2913-2926. [PMID: 28847987 DOI: 10.1158/1535-7163.mct-17-0353] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 07/17/2017] [Accepted: 08/22/2017] [Indexed: 01/08/2023]
Abstract
Lung cancer is the leading cause of cancer-related deaths with small-cell lung cancer (SCLC) as the most aggressive subtype. Preferential occurrence of TP53 missense mutations rather than loss implicates a selective advantage for TP53-mutant expression in SCLC pathogenesis. We show that lung epithelial expression of R270H and R172H (R273H and R175H in humans), common TRP53 mutants in lung cancer, combined with RB1 loss selectively results in two subtypes of neuroendocrine carcinoma, SCLC and large cell neuroendocrine carcinoma (LCNEC). Tumor initiation and progression occur in a remarkably consistent time frame with short latency and uniform progression to lethal metastatic disease by 7 months. R270H or R172H expression and TRP53 loss result in similar phenotypes demonstrating that TRP53 mutants promote lung carcinogenesis through loss-of-function and not gain-of-function mechanisms. Tumor responses to targeted and cytotoxic therapeutics were discordant in mice and corresponding tumor cell cultures demonstrating need to assess therapeutic response at the organismal level. Rapamycin did not have therapeutic efficacy in the mouse model despite inhibiting mTOR signaling and markedly suppressing tumor cell growth in culture. In contrast, cisplatin/etoposide treatment using a patient regimen prolonged survival with development of chemoresistance recapitulating human responses. R270H, but not R172H, expression conferred gain-of-function activity in attenuating chemotherapeutic efficacy. These data demonstrate a causative role for TRP53 mutants in development of chemoresistant lung cancer, and provide tractable preclinical models to test novel therapeutics for refractory disease. Mol Cancer Ther; 16(12); 2913-26. ©2017 AACR.
Collapse
Affiliation(s)
- Nagako Akeno
- Division of Pathology & Laboratory Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Alisa L Reece
- Division of Pathology & Laboratory Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Melissa Callahan
- Division of Pathology & Laboratory Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Ashley L Miller
- Division of Pathology & Laboratory Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Rebecca G Kim
- University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Diana He
- Division of Pathology & Laboratory Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Adam Lane
- Cancer and Blood Diseases Institute, Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Jonathan S Moulton
- Department of Radiology, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Kathryn A Wikenheiser-Brokamp
- Division of Pathology & Laboratory Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio. .,University of Cincinnati College of Medicine, Cincinnati, Ohio.,Department of Pathology & Laboratory Medicine, University of Cincinnati College of Medicine, Cincinnati, Ohio.,Perinatal Institute, Division of Pulmonary Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| |
Collapse
|
23
|
Tang F, Hu P, Yang Z, Xue C, Gong J, Sun S, Shi L, Zhang S, Li Z, Yang C, Zhang J, Xie C. SBI0206965, a novel inhibitor of Ulk1, suppresses non-small cell lung cancer cell growth by modulating both autophagy and apoptosis pathways. Oncol Rep 2017; 37:3449-3458. [PMID: 28498429 DOI: 10.3892/or.2017.5635] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2016] [Accepted: 05/02/2017] [Indexed: 11/05/2022] Open
Abstract
Lung cancer is a major public health problem worldwide. Non-small cell lung cancer (NSCLC) accounts for 85% of lung cancer cases. Autophagy has recently sparked great interest, and it is thought to participate in a variety of diseases, including lung cancer. Uncoordinated (Unc) 51-like kinase 1 (Ulk1), a serine/threonine kinase, plays a central role in the autophagy pathway. However, the role of Ulk1 in NSCLC remains unclear. We report that NSCLC cell lines exhibited high expression of Ulk1 and that Ulk1 was negatively correlated with prognosis in lung cancer patients. Knockdown of Ulk1 or the inhibition of Ulk1 by the selective inhibitor SBI0206965, inhibited cell proliferation, induced cell apoptosis and enhanced the sensitivity of cisplatin against NSCLC cells. Moreover, we demonstrated that Ulk1 exerted oncogenic activity in NSCLC by modulating both autophagy and apoptosis pathways. Inhibition of autophagy by SBI0206965 sensitized NSCLC cells to cisplatin by inhibiting cisplatin induced cell-protective autophagy to promote apoptosis. Furthermore, SBI0206965 promoted apoptosis in NSCLC cells independent of autophagy, which was partly mediated by destabilization of Bcl2/Bclxl. In summary, our results show that inhibition of Ulk1 suppresses NSCLC cell growth and sensitizes NSCLC cells to cisplatin by modulating both autophagy and apoptosis pathways, and that Ulk1 might be a promising target for NSCLC treatment.
Collapse
Affiliation(s)
- Fang Tang
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Pengchao Hu
- Department of Pathology and Pathophysiology, School of Basic Medical Sciences, Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Zetian Yang
- Department of Thoracic and Cardiovascular Surgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Chao Xue
- Department of Thoracic and Cardiovascular Surgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Jun Gong
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Shaoxing Sun
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Liu Shi
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Shimin Zhang
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Zhenzhen Li
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Chunxu Yang
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Junhong Zhang
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Conghua Xie
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| |
Collapse
|
24
|
Li R, Ding C, Zhang J, Xie M, Park D, Ding Y, Chen G, Zhang G, Gilbert-Ross M, Zhou W, Marcus AI, Sun SY, Chen ZG, Sica GL, Ramalingam SS, Magis AT, Fu H, Khuri FR, Curran WJ, Owonikoko TK, Shin DM, Zhou J, Deng X. Modulation of Bax and mTOR for Cancer Therapeutics. Cancer Res 2017; 77:3001-3012. [PMID: 28381544 DOI: 10.1158/0008-5472.can-16-2356] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2016] [Revised: 10/18/2016] [Accepted: 03/22/2017] [Indexed: 01/03/2023]
Abstract
A rationale exists for pharmacologic manipulation of the serine (S)184 phosphorylation site of the proapoptotic Bcl2 family member Bax as an anticancer strategy. Here, we report the refinement of the Bax agonist SMBA1 to generate CYD-2-11, which has characteristics of a suitable clinical lead compound. CYD-2-11 targeted the structural pocket proximal to S184 in the C-terminal region of Bax, directly activating its proapoptotic activity by inducing a conformational change enabling formation of Bax homooligomers in mitochondrial membranes. In murine models of small-cell and non-small cell lung cancers, including patient-derived xenograft and the genetically engineered mutant KRAS-driven lung cancer models, CYD-2-11 suppressed malignant growth without evident significant toxicity to normal tissues. In lung cancer patients treated with mTOR inhibitor RAD001, we observed enhanced S184 Bax phosphorylation in lung cancer cells and tissues that inactivates the propaoptotic function of Bax, contributing to rapalog resistance. Combined treatment of CYD-2-11 and RAD001 in murine lung cancer models displayed strong synergistic activity and overcame rapalog resistance in vitro and in vivo Taken together, our findings provide preclinical evidence for a pharmacologic combination of Bax activation and mTOR inhibition as a rational strategy to improve lung cancer treatment. Cancer Res; 77(11); 3001-12. ©2017 AACR.
Collapse
Affiliation(s)
- Rui Li
- Department of Radiation Oncology, Emory University School of Medicine and Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Chunyong Ding
- Department of Pharmacology and Toxicology, Chemical Biology Program, University of Texas Medical Branch, Galveston, Texas
| | - Jun Zhang
- Department of Hematology and Medical Oncology, Emory University School of Medicine and Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Maohua Xie
- Department of Radiation Oncology, Emory University School of Medicine and Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Dongkyoo Park
- Department of Radiation Oncology, Emory University School of Medicine and Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Ye Ding
- Department of Pharmacology and Toxicology, Chemical Biology Program, University of Texas Medical Branch, Galveston, Texas
| | - Guo Chen
- Department of Radiation Oncology, Emory University School of Medicine and Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Guojing Zhang
- Department of Hematology and Medical Oncology, Emory University School of Medicine and Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Melissa Gilbert-Ross
- Department of Hematology and Medical Oncology, Emory University School of Medicine and Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Wei Zhou
- Department of Hematology and Medical Oncology, Emory University School of Medicine and Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Adam I Marcus
- Department of Hematology and Medical Oncology, Emory University School of Medicine and Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Shi-Yong Sun
- Department of Hematology and Medical Oncology, Emory University School of Medicine and Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Zhuo G Chen
- Department of Hematology and Medical Oncology, Emory University School of Medicine and Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Gabriel L Sica
- Department of Pathology, Emory University School of Medicine and Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Suresh S Ramalingam
- Department of Hematology and Medical Oncology, Emory University School of Medicine and Winship Cancer Institute of Emory University, Atlanta, Georgia
| | | | - Haian Fu
- Department of Hematology and Medical Oncology, Emory University School of Medicine and Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Fadlo R Khuri
- Department of Hematology and Medical Oncology, Emory University School of Medicine and Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Walter J Curran
- Department of Radiation Oncology, Emory University School of Medicine and Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Taofeek K Owonikoko
- Department of Hematology and Medical Oncology, Emory University School of Medicine and Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Dong M Shin
- Department of Hematology and Medical Oncology, Emory University School of Medicine and Winship Cancer Institute of Emory University, Atlanta, Georgia.
| | - Jia Zhou
- Department of Pharmacology and Toxicology, Chemical Biology Program, University of Texas Medical Branch, Galveston, Texas.
| | - Xingming Deng
- Department of Radiation Oncology, Emory University School of Medicine and Winship Cancer Institute of Emory University, Atlanta, Georgia.
| |
Collapse
|
25
|
Jin L, Xu M, Luo XH, Zhu XF. Stephania Tetrandra and Ginseng-Containing Chinese Herbal Formulation NSENL Reverses Cisplatin Resistance in Lung Cancer Xenografts. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2017; 45:385-401. [PMID: 28231742 DOI: 10.1142/s0192415x17500240] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Chinese Herbal Formulation, supplement energy and nourish lung (SENL), effectively enhances chemotherapeutic efficacy in lung cancer treatment and reverses multi-drug resistance (MDR) in lung cancer cells in vitro. The present study is designed to assess the effect of a New SENL (NSENL, modification of SENL) formulation on resistance to chemotherapy of cisplatin (DDP)-resistant human lung cancer cell line (A549/DDP) xenografts in nude mice. We assessed six constituents in NSENL by high performance liquid chromatography (HPLC). BALB/c nude mice harboring A549/DDP cell xenografts were established to assess the antitumor effect of NSENL and its impact on the expression of MDR related genes. The six constituents in NSENL, including ginsenoside Rg1, ginsenoside Rb1, ginsenoside Rg3, astragaloside IV, ophiopogonin D and tetrandrine were quantitated simultaneously by HPLC. The combination of NSENL with DDP significantly inhibited tumor growth at a rate of up to 66.8% ([Formula: see text]). In addition, NSENL as monotherapy or combined with DDP downregulated multidrug resistance-associated protein 1 (MRP1), basic fibroblast growth factor (bFGF) and fibroblast growth factor receptor 1 (FGFR1) at both the mRNA and protein levels ([Formula: see text]), reduced glutathione S-transferase π (GST-π) protein expression and tumor microvascular density as well as decreased phosphorylation of protein kinase B (Akt) and mammalian target of rapamycin (mTOR) ([Formula: see text]). These findings demonstrated that NSENL can reverse MDR in A549/DDP cells in vivo, an effect possibly associated with downregulation of MDR-associated genes as well as inhibition of bFGF/FGFR and phosphatidylinositol 3-kinase (PI3K)/Akt/mTOR signaling pathways.
Collapse
Affiliation(s)
- Ling Jin
- * Department of Oncology, The First Affiliated Hospital, Jinan University, Guangzhou 510630, China.,† Department of Traditional Chinese Medicine, The First Affiliated Hospital, Jinan University, Guangzhou 510630, China
| | - Meng Xu
- * Department of Oncology, The First Affiliated Hospital, Jinan University, Guangzhou 510630, China
| | - Xue-Hua Luo
- † Department of Traditional Chinese Medicine, The First Affiliated Hospital, Jinan University, Guangzhou 510630, China
| | - Xiao-Feng Zhu
- † Department of Traditional Chinese Medicine, The First Affiliated Hospital, Jinan University, Guangzhou 510630, China
| |
Collapse
|
26
|
Malley CO, Pidgeon GP. The mTOR pathway in obesity driven gastrointestinal cancers: Potential targets and clinical trials. BBA CLINICAL 2015; 5:29-40. [PMID: 27051587 PMCID: PMC4802403 DOI: 10.1016/j.bbacli.2015.11.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Revised: 11/03/2015] [Accepted: 11/11/2015] [Indexed: 12/20/2022]
Abstract
The mechanistic target of rapamycin (mTOR) is a crucial point of convergence between growth factor signalling, metabolism, nutrient status and cellular proliferation. The mTOR pathway is heavily implicated in the progression of many cancers and is emerging as an important driver of gastrointestinal (GI) malignancies. Due to its central role in adapting metabolism to environmental conditions, mTOR signalling is also believed to be critical in the development of obesity. Recent research has delineated that excessive nutrient intake can promote signalling through the mTOR pathway and possibly evoke changes to cellular metabolism that could accelerate obesity related cancers. Acting through its two effector complexes mTORC1 and mTORC2, mTOR dictates the transcription of genes important in glycolysis, lipogenesis, protein translation and synthesis and has recently been defined as a central mediator of the Warburg effect in cancer cells. Activation of the mTOR pathway is involved in both the pathogenesis of GI malignancies and development of resistance to conventional chemotherapy and radiotherapy. The use of mTOR inhibitors is a promising therapeutic option in many GI malignancies, with greatest clinical efficacy seen in combination regimens. Recent research has also provided insight into crosstalk between mTOR and other pathways which could potentially expand the list of therapeutic targets in the mTOR pathway. Here we review the available strategies for targeting the mTOR pathway in GI cancers. We discuss current clinical trials of both established and novel mTOR inhibitors, with particular focus on combinations of these drugs with conventional chemotherapy, radiotherapy and targeted therapies.
Collapse
Affiliation(s)
- Cian O Malley
- Department of Surgery, Institute of Molecular Medicine, Trinity College Dublin, Dublin, Ireland
| | - Graham P Pidgeon
- Department of Surgery, Institute of Molecular Medicine, Trinity College Dublin, Dublin, Ireland
| |
Collapse
|
27
|
Leisching GR, Loos B, Botha MH, Engelbrecht AM. The role of mTOR during cisplatin treatment in an in vitro and ex vivo model of cervical cancer. Toxicology 2015. [PMID: 26201060 DOI: 10.1016/j.tox.2015.07.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Cisplatin is used as a cytotoxic agent for the management of cervical cancer. However, the severity of the side-effects limits the use of this drug, particularly at high doses. Resistance to cisplatin is often attributed to a disruption in the normal apoptotic response via aberrant activation of pathways such as the mTOR pathway. Here we assess the role of mTOR and its effect on cell death sensitization and autophagy in response to a low concentration of cisplatin in cervical cancer cells. Additionally we measured the expression profile of mTOR in normal, low- and high-grade squamous intraepithelial (LSIL and HSIL) lesions and cancerous tissue. An in vitro model of cervical cancer was established using HeLa and CaSki cells. mTOR protein expression as well as autophagy-related proteins were evaluated through Western blotting. Inhibition of mTOR was achieved with the use of rapamycin and RNA silencing. A low concentration of cisplatin administered as a single agent induces autophagy, but not apoptosis. Cisplatin cytotoxicity was greatly enhanced in cancer cells when mTOR had been inhibited prior to cisplatin treatment which was likely due to autophagy being increased above cisplatin-induced levels, thereby inducing apoptosis. Cervical tissue samples revealed an increase in mTOR protein expression in LSIL and carcinoma tissue which suggests a change in autophagy control. Our data suggest that utilising a lower dose of cisplatin combined with mTOR inhibition is a viable treatment option and addresses the challenge of cisplatin dose-dependent toxicity, however future studies are required to confirm this in a clinical setting.
Collapse
Affiliation(s)
- G R Leisching
- Department of Physiological Sciences, Stellenbosch University, c/o Merriman and Bosman Road, Stellenbosch, South Africa.
| | - B Loos
- Department of Physiological Sciences, Stellenbosch University, c/o Merriman and Bosman Road, Stellenbosch, South Africa
| | - M H Botha
- Department of Obstetrics and Gynaecology, Stellenbosch University, Francie van Zyl Avenue, Tygerberg South Africa
| | - A-M Engelbrecht
- Department of Physiological Sciences, Stellenbosch University, c/o Merriman and Bosman Road, Stellenbosch, South Africa
| |
Collapse
|
28
|
Shen L, Sun C, Li Y, Li X, Sun T, Liu C, Zhou Y, Du Z. MicroRNA-199a-3p suppresses glioma cell proliferation by regulating the AKT/mTOR signaling pathway. Tumour Biol 2015; 36:6929-38. [PMID: 25854175 PMCID: PMC4644202 DOI: 10.1007/s13277-015-3409-z] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Accepted: 03/29/2015] [Indexed: 12/30/2022] Open
Abstract
Glioma has been investigated for decades, but the prognosis remains poor because of rapid proliferation, its aggressive potential, and its resistance to chemotherapy or radiotherapy. The mammalian target of rapamycin (mTOR) is highly expressed and regulates cellular proliferation and cell growth. MicroRNAs (miRNAs) are small non-coding RNAs that regulate gene transcription and translation via up-regulating or down-regulating the levels of miRNAs. This study was conducted to explore the molecular functions of miR-199a-3p in glioma. We detected the expression of miR-199a-3p in glioma samples by quantitative PCR (qPCR). Then, we transfected the U87 and U251 cell lines with miR-199a-3p. Cellular proliferation, invasion, and apoptosis were assessed to explain the function of miR-199a-3p. PCR confirmed that the expression of miR-199a-3p was lower in glioma samples combined with normal brain tissues. The over-expression of miR-199a-3p might target mTOR and restrained cellular growth and proliferation but not invasive and apoptosis capability. Results indicated that cellular proliferation was inhibited to regulate the AKT/mTOR signaling pathway by elevating levels of miR-199a-3p. MiR-199a-3p in glioma cell lines has effects similar to the tumor suppressor gene on cellular proliferation via the AKT/mTOR signaling pathway.
Collapse
Affiliation(s)
- Liang Shen
- Neurosurgery and Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, Jiangsu, 215006, People's Republic of China
| | - Chunming Sun
- Neurosurgery and Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, Jiangsu, 215006, People's Republic of China
| | - Yanyan Li
- Neurosurgery and Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, Jiangsu, 215006, People's Republic of China
| | - Xuetao Li
- Neurosurgery and Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, Jiangsu, 215006, People's Republic of China
| | - Ting Sun
- Neurosurgery and Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, Jiangsu, 215006, People's Republic of China
| | - Chuanjin Liu
- Neurosurgery and Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, Jiangsu, 215006, People's Republic of China
| | - Youxin Zhou
- Neurosurgery and Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, Jiangsu, 215006, People's Republic of China.
| | - Ziwei Du
- Neurosurgery and Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, Jiangsu, 215006, People's Republic of China
| |
Collapse
|
29
|
Moon DG, Lee SE, Oh MM, Lee SC, Jeong SJ, Hong SK, Yoon CY, Byun SS, Park HS, Cheon J. NVP-BEZ235, a dual PI3K/mTOR inhibitor synergistically potentiates the antitumor effects of cisplatin in bladder cancer cells. Int J Oncol 2014; 45:1027-35. [PMID: 24969552 PMCID: PMC4121414 DOI: 10.3892/ijo.2014.2505] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Accepted: 05/19/2014] [Indexed: 11/28/2022] Open
Abstract
The PI3K/Akt/mTOR pathway is a prototypic survival pathway and constitutively activated in many malignant conditions. Moreover, activation of the PI3K/Akt/mTOR pathway confers resistance to various cancer therapies and is often associated with a poor prognosis. In this study, we explored the antitumor effect of NVP-BEZ235, a dual PI3K/mTOR inhibitor in cisplatin-resistant human bladder cancer cells and its synergistic interaction with cisplatin. A human bladder cancer cell line with cisplatin resistance was exposed to escalating doses of NVP-BEZ235 alone or in combination with cisplatin and antitumor effects was determined by the CCK-8 assay. Based on a dose-response study, synergistic interaction between NVP-BEZ235 and cisplatin was evaluated by combination index (CI), three-dimensional model and clonogenic assay. The combination of NVP-BEZ235 and cisplatin caused significant synergistic antitumor effect in cisplatin-resistant bladder cancer cells over a wide dose range and reduced the IC50 of NVP-BEZ235 and cisplatin by 5.6- and 3.6-fold, respectively. Three-dimensional synergy analysis resulted in a synergy volume of 388.25 μM/ml2% indicating a strong synergistic effect of combination therapy. The combination therapy caused cell cycle arrest and caspase-dependent apoptosis. Although NVP-BEZ235 suppressed PI3K/mTOR signaling without any paradoxical induction of Akt activity, it caused MEK/ERK pathway activation. The present study demonstrated that the PI3K/mTOR dual inhibitor NVP-BEZ235 can synergistically potentiate the antitumor effects of cisplatin in cisplatin-resistant bladder cancer cells though the suppression of cell cycle progression and the survival pathway as well as induction of caspase-dependent apoptosis.
Collapse
Affiliation(s)
- Du G Moon
- Department of Urology, College of Medicine, Korea University, Guro Hospital, Seoul, Republic of Korea
| | - Sang E Lee
- Department of Urology, School of Medicine, Seoul National University, Bundang Hospital, Gyeonggi‑do, Seoul, Republic of Korea
| | - Mi M Oh
- Department of Urology, College of Medicine, Korea University, Guro Hospital, Seoul, Republic of Korea
| | - Sang C Lee
- Department of Urology, School of Medicine, Seoul National University, Bundang Hospital, Gyeonggi‑do, Seoul, Republic of Korea
| | - Seong J Jeong
- Department of Urology, School of Medicine, Seoul National University, Bundang Hospital, Gyeonggi‑do, Seoul, Republic of Korea
| | - Sung K Hong
- Department of Urology, School of Medicine, Seoul National University, Bundang Hospital, Gyeonggi‑do, Seoul, Republic of Korea
| | - Cheol Y Yoon
- Department of Urology, College of Medicine, Korea University, Guro Hospital, Seoul, Republic of Korea
| | - Seok S Byun
- Department of Urology, School of Medicine, Seoul National University, Bundang Hospital, Gyeonggi‑do, Seoul, Republic of Korea
| | - Hong S Park
- Department of Urology, College of Medicine, Korea University, Guro Hospital, Seoul, Republic of Korea
| | - Jun Cheon
- Department of Urology, College of Medicine, Korea University, Anam Hospital, Seoul, Republic of Korea
| |
Collapse
|
30
|
Tsubaki M, Komai M, Itoh T, Imano M, Sakamoto K, Shimaoka H, Ogawa N, Mashimo K, Fujiwara D, Takeda T, Mukai J, Sakaguchi K, Satou T, Nishida S. Inhibition of the tumour necrosis factor-alpha autocrine loop enhances the sensitivity of multiple myeloma cells to anticancer drugs. Eur J Cancer 2013; 49:3708-17. [PMID: 23932230 DOI: 10.1016/j.ejca.2013.07.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 06/25/2013] [Accepted: 07/15/2013] [Indexed: 01/11/2023]
Abstract
Several autocrine soluble factors, including macrophage inflammatory protein-1α and tumour necrosis factor-alpha (TNF-α), promote the survival and growth of multiple myeloma (MM) cells. We hypothesised that inhibition of the TNF-α autocrine loop may enhance the cytotoxic effect of anticancer drugs in MM cell lines. In the present study, a TNF-α-neutralizing antibody suppressed cell proliferation and enhanced the cytotoxic effect of anticancer drugs on MM cells. In addition, combination treatment with the TNF-α-neutralizing antibody and the chemotherapy agent melphalan inhibited nuclear factor κB (NF-κB) p65 nuclear translocation and mammalian target of rapamycin (mTOR) activation and upregulated the expression of Bax and Bim. Treatment of ARH-77 cells with the NF-κB inhibitor dimethyl fumarate or the mTOR inhibitor rapamycin suppressed NF-κB p65 nuclear translocation and enhanced the cytotoxic effect of melphalan. Furthermore, infliximab, a monoclonal antibody against TNF-α, also enhanced the cytotoxic effect of anticancer drugs in ARH-77 cells. These results indicated that TNF-α-neutralizing antibodies or infliximab enhanced the cytotoxic effect of anticancer drugs by suppressing the TNF receptor/mTOR/NF-κB pathways. The inhibition of TNF-α may thus provide a new therapeutic approach to control tumour progression and bone destruction in MM patients.
Collapse
Affiliation(s)
- Masanobu Tsubaki
- Division of Pharmacotherapy, Kinki University School of Pharmacy, Kowakae, Higashi-Osaka, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Wei F, Liu Y, Guo Y, Xiang A, Wang G, Xue X, Lu Z. miR-99b-targeted mTOR induction contributes to irradiation resistance in pancreatic cancer. Mol Cancer 2013; 12:81. [PMID: 23886294 PMCID: PMC3726417 DOI: 10.1186/1476-4598-12-81] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Accepted: 07/22/2013] [Indexed: 02/08/2023] Open
Abstract
Background Radiation exerts direct antitumor effects and is widely used in clinics, but the efficacy is severely compromised by tumor resistance. Therefore uncovering the mechanism of radioresistance might promote the development of new strategies to overcome radioresistance by manipulating activity of the key molecules. Methods Immunohistochemistry were used to find whether mTOR were over-activated in radioresistant patients’ biopsies. Then Western blot, real-time PCR and transfection were used to find whether radiotherapy regulates the expression and activity of mTOR by modulating its targeting microRNA in human pancreatic cancer cell lines PANC-1, Capan-2 and BxPC-3. Finally efficacy of radiation combined with mTOR dual inhibitor AZD8055 was assessed in vitro and in vivo. Results Ionizing radiation promoted mTOR expression and activation in pancreatic cancer cells through reducing miR-99b expression, which negatively regulated mTOR. Novel mTOR inhibitor, AZD8055 (10 nM, 100 nM, 500 nM) synergistically promoted radiation (0–10 Gy) induced cell growth inhibition and apoptosis. In human pancreatic cancer xenografts, fractionated radiation combined with AZD8055 treatment further increased the anti-tumor effect, the tumor volume was shrinked to 278 mm3 after combination treatment for 3 weeks compared with single radiation (678 mm3) or AZD8055 (708 mm3) treatment (P < 0.01). Conclusions Our data provide a rationale for overcoming radio-resistance by combined with mTOR inhibitor AZD8055 in pancreatic cancer therapy.
Collapse
|
32
|
Wang Z, Ting Z, Li Y, Chen G, Lu Y, Hao X. microRNA-199a is able to reverse cisplatin resistance in human ovarian cancer cells through the inhibition of mammalian target of rapamycin. Oncol Lett 2013; 6:789-794. [PMID: 24137412 PMCID: PMC3789061 DOI: 10.3892/ol.2013.1448] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Accepted: 06/07/2013] [Indexed: 01/07/2023] Open
Abstract
microRNAs (miRNAs/miRs) may have a crucial function in tumor metastasis through the regulation of a plethora of signaling pathways. Increasing evidence has shown that miR-199a is important in regulating the tumor metastasis of ovarian cancer, although the precise biological function of miR-199a is unclear at present. In the current study, it was observed that the expression levels of miR-199a were higher in OV2008 cells compared with C13* cells. However, lower levels of mammalian target of rapamycin (mTOR) protein were detected by western blotting in the OV2008 cells compared with the C13* cells. The miR-199a levels were increased in the C13* cells using miR-199a mimics and the mTOR levels were observed to decrease. This may have resulted in a reversal of cisplatin resistance in the C13* cells. To test this hypothesis, the Renilla luciferase reporter gene system was used to analyze the mTOR levels. The results indicated that the expression levels of mTOR were significantly blocked by the increased miR-199a levels. When the miR-199a inhibitor was applied to decrease the miR-199a levels, it was observed that the mTOR expression levels were increased, while cisplatin-induced apoptosis was decreased in the OV2008 cells. The study concludes that miR-199a is able to reverse cisplatin resistance in human ovarian cancer cells through the inhibition of mTOR and that mTOR may be the target of miR-199a during this process.
Collapse
Affiliation(s)
- Zhongxian Wang
- Department of Obstetrics and Gynecology, The First College of Clinical Medical Sciences and Yichang Central People's Hospital, China Three Gorges University, Yichang, P.R. China
| | | | | | | | | | | |
Collapse
|
33
|
TRIGKA ELENIANDRIANA, LEVIDOU GEORGIA, SAETTA ANGELICAA, CHATZIANDREOU ILENIA, TOMOS PERIKLIS, THALASSINOS NIKOLAOS, ANASTASIOU NIKOLAOS, SPARTALIS ELEFTHERIOS, KAVANTZAS NIKOLAOS, PATSOURIS EFSTRATIOS, KORKOLOPOULOU PENELOPE. A detailed immunohistochemical analysis of the PI3K/AKT/mTOR pathway in lung cancer: Correlation with PIK3CA, AKT1, K-RAS or PTEN mutational status and clinicopathological features. Oncol Rep 2013; 30:623-36. [DOI: 10.3892/or.2013.2512] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Accepted: 02/08/2013] [Indexed: 11/06/2022] Open
|
34
|
Ibrahim MA, Srivenugop KS, Rasul KI. Platinum Resistance: The Role of Molecular, Genetic and Epigenetic Factors. JOURNAL OF MEDICAL SCIENCES 2013. [DOI: 10.3923/jms.2013.160.168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
35
|
Del Bello B, Toscano M, Moretti D, Maellaro E. Cisplatin-induced apoptosis inhibits autophagy, which acts as a pro-survival mechanism in human melanoma cells. PLoS One 2013; 8:e57236. [PMID: 23437349 PMCID: PMC3577730 DOI: 10.1371/journal.pone.0057236] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2012] [Accepted: 01/18/2013] [Indexed: 01/11/2023] Open
Abstract
The interplay between a non-lethal autophagic response and apoptotic cell death is still a matter of debate in cancer cell biology. In the present study performed on human melanoma cells, we investigate the role of basal or stimulated autophagy in cisplatin-induced cytotoxicity, as well as the contribution of cisplatin-induced activation of caspases 3/7 and conventional calpains. The results show that, while down-regulating Beclin-1, Atg14 and LC3-II, cisplatin treatment inhibits the basal autophagic response, impairing a physiological pro-survival response. Consistently, exogenously stimulated autophagy, obtained with trehalose or calpains inhibitors (MDL-28170 and calpeptin), protects from cisplatin-induced apoptosis, and such a protection is reverted by inhibiting autophagy with 3-methyladenine or ATG5 silencing. In addition, during trehalose-stimulated autophagy, the cisplatin-induced activation of calpains is abrogated, suggesting the existence of a feedback loop between the autophagic process and calpains. On the whole, our results demonstrate that in human melanoma cells autophagy may function as a beneficial stress response, hindered by cisplatin-induced death mechanisms. In a therapeutic perspective, these findings suggest that the efficacy of cisplatin-based polychemotherapies for melanoma could be potentiated by inhibitors of autophagy.
Collapse
Affiliation(s)
- Barbara Del Bello
- Department of Pathophysiology, Experimental Medicine and Public Health, Istituto Toscano Tumori, University of Siena, Siena, Italy
| | - Marzia Toscano
- Department of Pathophysiology, Experimental Medicine and Public Health, Istituto Toscano Tumori, University of Siena, Siena, Italy
| | - Daniele Moretti
- Department of Pathophysiology, Experimental Medicine and Public Health, Istituto Toscano Tumori, University of Siena, Siena, Italy
| | - Emilia Maellaro
- Department of Pathophysiology, Experimental Medicine and Public Health, Istituto Toscano Tumori, University of Siena, Siena, Italy
- * E-mail:
| |
Collapse
|
36
|
Li J, Ping Z, Ning H. MiR-218 impairs tumor growth and increases chemo-sensitivity to cisplatin in cervical cancer. Int J Mol Sci 2012; 13:16053-64. [PMID: 23443110 PMCID: PMC3546678 DOI: 10.3390/ijms131216053] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Revised: 10/15/2012] [Accepted: 10/25/2012] [Indexed: 12/30/2022] Open
Abstract
MicroRNAs are noncoding RNA molecules of 18–25 nucleotides that regulate gene expression at the post-transcriptional levels. Recent data revealed that miR-218 played key roles in tumor metastasis. Here, we described the regulation and function of miR-218 in cervical cancer. Overexpression of miR-218 reduced the proliferation of the human cervical cancer cell line HeLa and induced cell apoptosis through the AKT-mTOR signaling pathway. In addition, it forced expression of miR-218 suppressed tumor growth in the orthotopic mouse model of HeLa cells. Furthermore, miR-218 increased chemosensitivity to cisplatin (CDDP) in vitro. Our results indicated that targeting miR-218 may provide a strategy for blocking the development of cervical cancer.
Collapse
Affiliation(s)
- Jiarui Li
- Department of Gynecology, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai 200092, China; E-Mails: (J.L.); (Z.P.)
| | - Zhang Ping
- Department of Gynecology, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai 200092, China; E-Mails: (J.L.); (Z.P.)
| | - Hui Ning
- Department of Gynecology and Obstetrics, Changhai Hospital, Second Military Medical University, 168 Changhai Road, Shanghai 200433, China
- Author to whom correspondence should be addressed; E-Mail: ; Tel./Fax: +86-21-8187-1114
| |
Collapse
|
37
|
YE SUJUAN, YANG WEIHAN, WANG YU, OU WENJING, MA QINGPING, YU CHUANJIANG, REN JIANG, ZHONG GUOXING, SHI HUASHAN, YUAN ZHU, SU XIAOLAN, ZHU WEN. Cationic liposome-mediated nitric oxide synthase gene therapy enhances the antitumor effects of cisplatin in lung cancer. Int J Mol Med 2012; 31:33-42. [DOI: 10.3892/ijmm.2012.1171] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2012] [Accepted: 08/02/2012] [Indexed: 11/06/2022] Open
|
38
|
MIYAKE NAOMI, CHIKUMI HIROKI, TAKATA MIYAKO, NAKAMOTO MASAKI, IGISHI TADASHI, SHIMIZU EIJI. Rapamycin induces p53-independent apoptosis through the mitochondrial pathway in non-small cell lung cancer cells. Oncol Rep 2012; 28:848-54. [DOI: 10.3892/or.2012.1855] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2012] [Accepted: 05/02/2012] [Indexed: 11/06/2022] Open
|
39
|
Jin HO, Hong SE, Woo SH, Lee JH, Choe TB, Kim EK, Noh WC, Lee JK, Hong SI, Kim JI, Park IC. Silencing of Twist1 sensitizes NSCLC cells to cisplatin via AMPK-activated mTOR inhibition. Cell Death Dis 2012; 3:e319. [PMID: 22673193 PMCID: PMC3388235 DOI: 10.1038/cddis.2012.63] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2012] [Revised: 04/30/2012] [Accepted: 05/07/2012] [Indexed: 01/25/2023]
Abstract
Twist1 is highly expressed in primary and metastatic non-small cell lung cancer (NSCLC), and thus acts as a critical target for lung cancer chemotherapy. In the current study, we investigated the underlying mechanism initiated by silencing of Twist1 that sensitizes NSCLC cells to cisplatin. Silencing of Twist1 triggered ATP depletion, leading to AMP-activated protein kinase (AMPK)-activated mammalian target of rapamycin (mTOR) inhibition in NSCLC cells. AMPK-induced mTOR inhibition, in turn, resulted in downregulation of ribosome protein S6 kinase 1 (S6K1) activity. Downregulation of mTOR/S6K1 reduced Mcl-1 protein expression, consequently promoting sensitization to cisplatin. Overexpression of Mcl-1 reduced PARP cleavage induced by cisplatin and Twist1 siRNA, suggesting that this sensitization is controlled through Mcl-1 expression. Interestingly, cells treated with Twist1 siRNA displayed upregulation of p21(Waf1/CIP1), and suppression of p21(Waf1/CIP1) with specific siRNA further enhanced the cell death response to cisplatin/Twist1 siRNA. In conclusion, silencing of Twist1 sensitizes lung cancer cells to cisplatin via stimulating AMPK-induced mTOR inhibition, leading to a reduction in Mcl-1 protein. To our knowledge, this is the first report to provide a rationale for the implication of cross-linking between Twist1 and mTOR signaling in resistance of NSCLC to anticancer drugs.
Collapse
Affiliation(s)
- H-O Jin
- Division of Radiation Cancer Research, Korea Institute of Radiological and Medical Sciences, 215-4 Gongneung-dong, Nowon-gu, Seoul 139-706, Republic of Korea
| | - S-E Hong
- Division of Radiation Cancer Research, Korea Institute of Radiological and Medical Sciences, 215-4 Gongneung-dong, Nowon-gu, Seoul 139-706, Republic of Korea
- Department of Food and Microbial Technology, Seoul Women's University, 126 Gongneung-dong, Nowon-gu, Seoul 139-774, Republic of Korea
| | - S-H Woo
- Division of Radiation Cancer Research, Korea Institute of Radiological and Medical Sciences, 215-4 Gongneung-dong, Nowon-gu, Seoul 139-706, Republic of Korea
| | - J-H Lee
- Laboratory of Molecular Oncology, Cheil General Hospital and Women's Healthcare Center, Kwandong University, College of Medicine, 1-19 Mukjeong-dong, Jung-gu, Seoul 100-380, Republic of Korea
| | - T-B Choe
- Department of Microbiological Engineering, Kon-Kuk University, 120 Hwayang-dong, Gwangjin-gu, Seoul 143-701, Republic of Korea
| | - E-K Kim
- Department of Surgery, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, 215-4 Gongneung-dong, Nowon-gu, Seoul 139-706, Republic of Korea
| | - W-C Noh
- Department of Surgery, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, 215-4 Gongneung-dong, Nowon-gu, Seoul 139-706, Republic of Korea
| | - J-K Lee
- Department of Laboratory Medicine, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Science, 215-4 Gongneung-dong, Nowon-gu, Seoul 139-709, Republic of Korea
| | - S-I Hong
- Division of Radiation Cancer Research, Korea Institute of Radiological and Medical Sciences, 215-4 Gongneung-dong, Nowon-gu, Seoul 139-706, Republic of Korea
- Department of Laboratory Medicine, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Science, 215-4 Gongneung-dong, Nowon-gu, Seoul 139-709, Republic of Korea
| | - J-I Kim
- Department of Food and Microbial Technology, Seoul Women's University, 126 Gongneung-dong, Nowon-gu, Seoul 139-774, Republic of Korea
| | - I-C Park
- Division of Radiation Cancer Research, Korea Institute of Radiological and Medical Sciences, 215-4 Gongneung-dong, Nowon-gu, Seoul 139-706, Republic of Korea
| |
Collapse
|
40
|
A phase I study of temsirolimus plus carboplatin plus paclitaxel for patients with recurrent or metastatic (R/M) head and neck squamous cell cancer (HNSCC). Cancer Chemother Pharmacol 2012; 70:121-8. [PMID: 22644799 DOI: 10.1007/s00280-012-1894-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2012] [Accepted: 05/11/2012] [Indexed: 10/28/2022]
Abstract
PURPOSE The mammalian target of rapamycin complex 1 (mTORC1) is aberrantly activated in many head and neck squamous cell carcinomas (HNSCCs). This phase I study combines the mTORC1 inhibitor temsirolimus with carboplatin and paclitaxel. METHODS This was a single institution phase I study for patients with R/M HNSCC with a standard 3 + 3 design. Three doses of temsirolimus were planned: 15, 20, and 25 mg. Due to excessive toxicity with the original study regimen, the protocol was amended to carboplatin AUC 1.5, paclitaxel 80 mg/m(2), and temsirolimus (according to dose escalation plan), all on days 1 and 8 of a 21-day cycle. RESULTS 18 patients (14 male, 4 female) enrolled, with median age 56 years (range 33-78). The most common toxicities were anemia, leukopenia, thrombocytopenia, and hyperglycemia. Among all patients treated, the confirmed objective partial response (cPR) rate was 22 %. DLT was not exceeded among 6 patients treated at dose level 3 of the revised protocol, and 4 of 6 subjects treated at this dose level had cPRs. CONCLUSION The phase II recommended regimen is temsirolimus 25 mg, carboplatin AUC 1.5, and paclitaxel 80 mg/m(2), all on days 1 and 8 of a 21-day cycle. A phase II study of this regimen in R/M HNSCC is ongoing.
Collapse
|
41
|
Enhanced antitumor effect of cisplatin in human NSCLC cells by tumor suppressor LKB1. Cancer Gene Ther 2012; 19:489-98. [DOI: 10.1038/cgt.2012.18] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
42
|
Wangpaichitr M, Theodoropoulos G, Wu C, You M, Feun LG, Kuo MT, Savaraj N. The relationship of thioredoxin-1 and cisplatin resistance: its impact on ROS and oxidative metabolism in lung cancer cells. Mol Cancer Ther 2012; 11:604-15. [PMID: 22248473 PMCID: PMC3326609 DOI: 10.1158/1535-7163.mct-11-0599] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Elimination of cisplatin-resistant lung cancer cells remains a major obstacle. We have shown that cisplatin-resistant tumors have higher reactive oxygen species (ROS) levels and can be exploited for targeted therapy. Here, we show that increased secretion of the antioxidant thioredoxin-1 (TRX1) resulted in lowered intracellular TRX1 and contributed to higher ROS in cisplatin-resistant tumors in vivo and in vitro. By reconstituting TRX1 protein in cisplatin-resistant cells, we increased sensitivity to cisplatin but decreased sensitivity to elesclomol (ROS inducer). Conversely, decreased TRX1 protein in parental cells reduced the sensitivity to cisplatin but increased sensitivity to elesclomol. Cisplatin-resistant cells had increased endogenous oxygen consumption and mitochondrial activity but decreased lactic acid production. They also exhibited higher levels of argininosuccinate synthetase (ASS) and fumarase mRNA, which contributed to oxidative metabolism (OXMET) when compared with parental cells. Restoring intracellular TRX1 protein in cisplatin-resistant cells resulted in lowering ASS and fumarase mRNAs, which in turn sensitized them to arginine deprivation. Interestingly, cisplatin-resistant cells also had significantly higher basal levels of acetyl-CoA carboxylase (ACC) and fatty acid synthase (FAS). Overexpressing TRX1 lowered ACC and FAS proteins expressions in cisplatin-resistant cells. Chemical inhibition and short interfering RNA of ACC resulted in significant cell death in cisplatin-resistant compared with parental cells. Conversely, TRX1 overexpressed cisplatin-resistant cells resisted 5-(tetradecyloxy)-2-furoic acid (TOFA)-induced death. Collectively, lowering TRX1 expression through increased secretion leads cisplatin-resistant cells to higher ROS production and increased dependency on OXMET. These changes raise an intriguing therapeutic potential for future therapy in cisplatin-resistant lung cancer.
Collapse
Affiliation(s)
| | | | - Chunjing Wu
- Department of Veterans Affairs, South Florida VA Foundation, Miami, FL
| | - Min You
- Department of Medicine, Hematology/Oncology, University of Miami Miller School of Medicine, Miami, FL
| | - Lynn G. Feun
- Department of Medicine, Hematology/Oncology, University of Miami Miller School of Medicine, Miami, FL
| | - Macus T. Kuo
- Department of Molecular Pathology, MD Anderson Cancer Center, Houston, TX
| | - Niramol Savaraj
- Department of Veterans Affairs, South Florida VA Foundation, Miami, FL
- Department of Medicine, Hematology/Oncology, University of Miami Miller School of Medicine, Miami, FL
| |
Collapse
|
43
|
Zhu B, Zhou X. [The study of PI3K/AKT pathway in lung cancer metastasis and drug resistance]. ZHONGGUO FEI AI ZA ZHI = CHINESE JOURNAL OF LUNG CANCER 2011; 14:689-94. [PMID: 21859552 PMCID: PMC5999626 DOI: 10.3779/j.issn.1009-3419.2011.08.10] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
磷脂酰肌醇-3-激酶/丝苏氨酸蛋白激酶(phosphatidyl-inositol 3-kinase/serine-threonine kinase, PI3K/ AKT)信号通路是细胞内重要信号转导通路之一,通过影响下游多种效应分子的活化状态,在细胞内发挥抑制凋亡、促进增殖的关键作用,与人类多种肿瘤的发生发展密切相关。研究表明PI3K/AKT信号通路在恶性肿瘤细胞的增殖、血管新生和转移及对放化疗的拮抗中都起着重要作用。对PI3K/AKT信号通路的深入研究有望找到肿瘤预防和药物治疗的新靶点。本文简要介绍了PI3K/AKT信号通路的组成与功能调节,并着重阐述了其在肺癌转移和耐药中的作用。
Collapse
Affiliation(s)
- Bingjing Zhu
- Sixth Graduate Student Group, the Third Military University, Chongqing 400038, China
| | | |
Collapse
|
44
|
Liu Y, Sun SY, Owonikoko TK, Sica GL, Curran WJ, Khuri FR, Deng X. Rapamycin induces Bad phosphorylation in association with its resistance to human lung cancer cells. Mol Cancer Ther 2011; 11:45-56. [PMID: 22057915 DOI: 10.1158/1535-7163.mct-11-0578] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Inhibition of mTOR signaling by rapamycin has been shown to activate extracellular signal-regulated kinase 1 or 2 (ERK1/2) and Akt in various types of cancer cells, which contributes to rapamycin resistance. However, the downstream effect of rapamycin-activated ERKs and Akt on survival or death substrate(s) remains unclear. We discovered that treatment of human lung cancer cells with rapamycin results in enhanced phosphorylation of Bad at serine (S) 112 and S136 but not S155 in association with activation of ERK1/2 and Akt. A higher level of Bad phosphorylation was observed in rapamycin-resistant cells compared with parental rapamycin-sensitive cells. Thus, Bad phosphorylation may contribute to rapamycin resistance. Mechanistically, rapamycin promotes Bad accumulation in the cytosol, enhances Bad/14-3-3 interaction, and reduces Bad/Bcl-XL binding. Rapamycin-induced Bad phosphorylation promotes its ubiquitination and degradation, with a significant reduction of its half-life (i.e., from 53.3-37.5 hours). Inhibition of MEK/ERK by PD98059 or depletion of Akt by RNA interference blocks rapamycin-induced Bad phosphorylation at S112 or S136, respectively. Simultaneous blockage of S112 and S136 phosphorylation of Bad by PD98059 and silencing of Akt significantly enhances rapamycin-induced growth inhibition in vitro and synergistically increases the antitumor efficacy of rapamycin in lung cancer xenografts. Intriguingly, either suppression of Bad phosphorylation at S112 and S136 sites or expression of the nonphosphorylatable Bad mutant (S112A/S136A) can reverse rapamycin resistance. These findings uncover a novel mechanism of rapamycin resistance, which may promote the development of new strategies for overcoming rapamycin resistance by manipulating Bad phosphorylation at S112 and S136 in human lung cancer.
Collapse
Affiliation(s)
- Yan Liu
- State Key Laboratory of Cancer Biology, Department of Biopharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an, People's Republic of China
| | | | | | | | | | | | | |
Collapse
|
45
|
Predictive biomarkers for the activity of mammalian target of rapamycin (mTOR) inhibitors. Target Oncol 2011; 6:119-24. [PMID: 21533544 DOI: 10.1007/s11523-011-0177-6] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2011] [Accepted: 04/01/2011] [Indexed: 11/27/2022]
Abstract
In the quest for personalized medicine, only a few biological parameters are routinely used to select patients prior to the initiation of anticancer targeted therapies, including mTOR inhibitors. Identifying biological factors that may predict efficacy or resistance to mTOR inhibitors represents an important challenge since rapalogs may exert antitumor effects through multiple mechanisms of action. Despite the fact that no such a factor is currently available, several molecular patterns are emerging, correlating with sensitivity and/or resistance to rapalogs. While activation of the phosphatidylinositol 3 kinase (PI3K)/AKT/mammalian target of rapamycin (mTOR) pathway, overexpression of cyclin D1, and functional apoptosis seem to sensitize tumor cells to rapalogs, Bcl2 overexpression or KRAS mutations are reported to be associated with resistance to mTOR inhibitors in several preclinical models. Translational research aimed at validating those parameters in clinical trials is ongoing.
Collapse
|
46
|
Liao YM, Kim C, Yen Y. Mammalian target of rapamycin and head and neck squamous cell carcinoma. HEAD & NECK ONCOLOGY 2011; 3:22. [PMID: 21513566 PMCID: PMC3108931 DOI: 10.1186/1758-3284-3-22] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2011] [Accepted: 04/24/2011] [Indexed: 12/26/2022]
Abstract
Head and neck squamous cell carcinoma (HNSCC), a significant cause of cancer deaths worldwide, has multiple stepwise malignant evolutions. Mammalian target of rapamycin (mTOR) plays a critical role in tumor development, invasion, metastasis and angiogenesis that impact local recurrence and survival. mTOR can also act as a biomarker for personalized adjuvant therapy. In in vivo and in vitro studies, mTOR inhibitor suppresses tumor growth and sensitizes HNSCC to radiation, cytotoxic agents and epidermoid growth factor receptor inhibitors. We have reviewed the pathogenesis of HNSCC, mTOR pathway, mTOR inhibitor and the role of mTOR in HNSCC.
Collapse
Affiliation(s)
- Yu-Min Liao
- Division of Hematology and Oncology, Department of Internal Medicine, China Medical University Hospital, Taichung, 404, Taiwan
| | - Charles Kim
- Department of Molecular Pharmacology, Beckman Research Institute, City of Hope Comprehensive Cancer, Duarte, CA 91010, USA
| | - Yun Yen
- Department of Molecular Pharmacology, Beckman Research Institute, City of Hope Comprehensive Cancer, Duarte, CA 91010, USA
| |
Collapse
|
47
|
Carew JS, Kelly KR, Nawrocki ST. Mechanisms of mTOR inhibitor resistance in cancer therapy. Target Oncol 2011; 6:17-27. [PMID: 21547705 DOI: 10.1007/s11523-011-0167-8] [Citation(s) in RCA: 126] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2011] [Accepted: 02/22/2011] [Indexed: 01/06/2023]
Abstract
Mammalian target of rapamycin (mTOR) is a conserved serine/threonine kinase that regulates cell cycle progression, protein translation, metabolism, and cellular proliferation. The mTOR pathway promotes cell proliferation under energy or nutrient-rich conditions by increasing ribosomal biogenesis and protein synthesis. Since enhanced activity of the mTOR pathway is frequently observed in malignant cells, inhibition of this kinase has become an attractive strategy to treat cancer. Rapamycin and its analogs temsirolimus, everolimus, and ridaforolimus referred to as "rapalogs" have demonstrated promising efficacy against renal cell carcinoma and are under investigation for the treatment of other malignancies. However, the emergence of drug resistance may ultimately limit the utility of rapalog therapy. Here we summarize the known mechanisms of resistance to mTOR-inhibitor therapy and describe potential strategies to overcome these for the current agents that target this pathway.
Collapse
Affiliation(s)
- Jennifer S Carew
- Department of Medicine and Institute for Drug Development, Cancer Therapy and Research Center at The University of Texas Health Science Center, 14960 Omicron Drive, San Antonio, TX 78245, USA
| | | | | |
Collapse
|
48
|
Liu D, Huang Y, Chen B, Zeng J, Guo N, Zhang S, Liu L, Xu H, Mo X, Li W. Activation of mammalian target of rapamycin pathway confers adverse outcome in nonsmall cell lung carcinoma. Cancer 2011; 117:3763-73. [DOI: 10.1002/cncr.25959] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2010] [Revised: 12/31/2010] [Accepted: 01/03/2011] [Indexed: 01/11/2023]
|
49
|
Janjetovic K, Vucicevic L, Misirkic M, Vilimanovich U, Tovilovic G, Zogovic N, Nikolic Z, Jovanovic S, Bumbasirevic V, Trajkovic V, Harhaji-Trajkovic L. Metformin reduces cisplatin-mediated apoptotic death of cancer cells through AMPK-independent activation of Akt. Eur J Pharmacol 2010; 651:41-50. [PMID: 21114978 DOI: 10.1016/j.ejphar.2010.11.005] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2010] [Revised: 09/30/2010] [Accepted: 11/07/2010] [Indexed: 12/01/2022]
Abstract
Metformin is an antidiabetic drug with anticancer properties, which mainly acts through induction of AMP-activated protein kinase (AMPK). In the present study we investigated the influence of metformin on the in vitro anticancer activity of the well-known chemotherapeutic agent cisplatin. Cell viability was determined by MTT and LDH release assay, oxidative stress and apoptosis (caspase activation, DNA fragmentation, and phosphatidylserine exposure) were assessed by flow cytometry, while activation of AMPK and Akt was analyzed by immunoblotting. Although metformin reduced the number of tumour cells when applied alone, it surprisingly antagonized the cytotoxicity of cisplatin towards U251 human glioma, C6 rat glioma, SHSY5Y human neuroblastoma, L929 mouse fibrosarcoma and HL-60 human leukemia cell lines. Only in B16 mouse melanoma cells metformin augmented the cytotoxicity of cisplatin. In U251 glioma cells metformin suppressed cisplatin-induced apoptotic cell death through inhibition of oxidative stress and caspase activation. The observed cytoprotection was apparently AMPK-independent, as metformin did not further increase cisplatin-induced AMPK activation in U251 cells and other pharmacological AMPK activators failed to block cisplatin-mediated apoptosis. On the other hand, metformin induced Akt activation in cisplatin-treated cells and Akt inhibitor 10-DEBC hydrochloride or phosphoinositide 3-kinase/Akt inhibitor LY294002 abolished metformin-mediated antioxidant and antiapoptotic effects. In conclusion, the antidiabetic drug metformin reduces cisplatin in vitro anticancer activity through AMPK-independent upregulation of Akt survival pathway. These data warrant caution when considering metformin for treatment of diabetic cancer patients receiving cisplatin or as a potential adjuvant in cisplatin-based chemotherapeutic regimens.
Collapse
Affiliation(s)
- Kristina Janjetovic
- Institute of Microbiology and Immunology, University of Belgrade, 11000 Belgrade, Serbia
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Rapamycin synergizes cisplatin sensitivity in basal-like breast cancer cells through up-regulation of p73. Breast Cancer Res Treat 2010; 128:301-13. [DOI: 10.1007/s10549-010-1055-0] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2010] [Accepted: 07/07/2010] [Indexed: 02/01/2023]
|