1
|
Transcriptome-Based Traits of Radioresistant Sublines of Non-Small Cell Lung Cancer Cells. Int J Mol Sci 2023; 24:ijms24033042. [PMID: 36769365 PMCID: PMC9917840 DOI: 10.3390/ijms24033042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 01/30/2023] [Accepted: 01/31/2023] [Indexed: 02/09/2023] Open
Abstract
Radioresistance is a major obstacle for the successful therapy of many cancers, including non-small cell lung cancer (NSCLC). To elucidate the mechanism of radioresistance of NSCLC cells and to identify key molecules conferring radioresistance, the radioresistant subclones of p53 wild-type A549 and p53-deficient H1299 cell cultures were established. The transcriptional changes between parental and radioresistant NSCLC cells were investigated by RNA-seq. In total, expression levels of 36,596 genes were measured. Changes in the activation of intracellular molecular pathways of cells surviving irradiation relative to parental cells were quantified using the Oncobox bioinformatics platform. Following 30 rounds of 2 Gy irradiation, a total of 322 genes were differentially expressed between p53 wild-type radioresistant A549IR and parental A549 cells. For the p53-deficient (H1299) NSCLC cells, the parental and irradiated populations differed in the expression of 1628 genes and 1616 pathways. The expression of genes associated with radioresistance reflects the complex biological processes involved in clinical cancer cell eradication and might serve as a potential biomarker and therapeutic target for NSCLC treatment.
Collapse
|
2
|
COX-2 activity and expression pattern during regenerative wound healing of tail in lizard Hemidactylus flaviviridis. Prostaglandins Other Lipid Mediat 2018; 135:11-15. [DOI: 10.1016/j.prostaglandins.2018.01.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Revised: 01/18/2018] [Accepted: 01/24/2018] [Indexed: 11/22/2022]
|
3
|
Buch PR, Sarkate P, Uggini GK, Desai I, Balakrishnan S. Inhibition of Cyclooxygenase-2 Alters Wnt/β-Catenin Signaling in the Regenerating Tail of Lizard Hemidactylus flaviviridis. Tissue Eng Regen Med 2017; 14:171-178. [PMID: 30603474 PMCID: PMC6171583 DOI: 10.1007/s13770-017-0037-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 08/11/2016] [Accepted: 08/25/2016] [Indexed: 01/06/2023] Open
Abstract
Epimorphic regeneration in vertebrates involves the restoration of lost tissue or organs through the formation of a regeneration blastema and occurs through a complex interaction of a number of molecular signaling pathways. Of the many effectors of successful tail regeneration in the lizard Hemidactylus flaviviridis, one crucial pathway is the cyclooxygenase-2 (COX-2) mediated PGE2 signaling pathway. The current study was aimed at understanding whether COX-2 signaling plays any role in the expression of Wnt/β-Catenin signaling components during regenerative outgrowth in H. flaviviridis. Etoricoxib-selective inhibitor of the inducible isoform of COX-2-was administered to lizards orally. We tested the expression of β-Catenin during wound epidermis and blastema stages in the regenerating tail and found a reduction in its expression in response to drug treatment. Further, it was observed that the expression of canonical Wnt ligands was greatly altered due to COX-2 inhibition. Our results provide evidence of a cross-talk between the COX-2 induced PGE2 pathway and Wnt/β-Catenin signaling in the regenerating lizard tail. An understanding of the interaction among various signaling pathways will help elucidate the mechanism underlying epimorphosis in lizards, the only amniotes capable of appendage regeneration.
Collapse
Affiliation(s)
- Pranav R. Buch
- Department of Zoology, Faculty of Science, The M. S. University of Baroda, Vadodara, 390002 Gujarat India
| | - Pradeep Sarkate
- Department of Zoology, Faculty of Science, The M. S. University of Baroda, Vadodara, 390002 Gujarat India
| | - Gowri K. Uggini
- Department of Zoology, Faculty of Science, The M. S. University of Baroda, Vadodara, 390002 Gujarat India
| | - Isha Desai
- N. V. Patel College of Pure and Applied Sciences, S.P. University, Vallabh Vidyanagar, Anand, 388120 Gujarat India
| | - Suresh Balakrishnan
- Department of Zoology, Faculty of Science, The M. S. University of Baroda, Vadodara, 390002 Gujarat India
| |
Collapse
|
4
|
Kang S, Min A, Im SA, Song SH, Kim SG, Kim HA, Kim HJ, Oh DY, Jong HS, Kim TY, Bang YJ. TGF-β Suppresses COX-2 Expression by Tristetraprolin-Mediated RNA Destabilization in A549 Human Lung Cancer Cells. Cancer Res Treat 2014; 47:101-9. [PMID: 25544576 PMCID: PMC4296860 DOI: 10.4143/crt.2013.192] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2013] [Accepted: 12/18/2013] [Indexed: 11/21/2022] Open
Abstract
PURPOSE Overexpression of cyclooxygenase 2 (COX-2) is thought to promote survival of transformed cells. Transforming growth factor β (TGF-β) exerts anti-proliferative effects on a broad range of epithelial cells. In the current study, we investigated whether TGF-β can regulate COX-2 expression in A549 human lung adenocarcinoma cells, which are TGF-β-responsive and overexpress COX-2. MATERIALS AND METHODS Western blotting, Northern blotting, and mRNA stability assays were performed to demonstrate that COX-2 protein and mRNA expression were suppressed by TGF-β. We also evaluated the effects of tristetraprolin (TTP) on COX-2 mRNA using RNA interference. RESULTS We demonstrated that COX-2 mRNA and protein expression were both significantly suppressed by TGF-β. An actinomycin D chase experiment demonstrated that COX-2 mRNA was more rapidly degraded in the presence of TGF-β, suggesting that TGF-β-induced inhibition of COX-2 expression is achieved via decreased mRNA stability. We also found that TGF-β rapidly and transiently induced the expression of TTP, a well-known mRNA destabilizing factor, before suppression of COX-2 mRNA expression was observed. Using RNA interference, we confirmed that increased TTP levels play a pivotal role in the destabilization of COX-2 mRNA by TGF-β. Furthermore, we showed that Smad3 is essential to TTP-dependent down-regulation of COX-2 expression in response to TGF-β. CONCLUSION The results of this study show that TGF-β down-regulated COX-2 expression via mRNA destabilization mediated by Smad3/TTP in A549 cells.
Collapse
Affiliation(s)
- Soyeong Kang
- Cancer Research Institute, Seoul National University, Seoul, Korea
| | - Ahrum Min
- Cancer Research Institute, Seoul National University, Seoul, Korea
| | - Seock-Ah Im
- Cancer Research Institute, Seoul National University, Seoul, Korea ; Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea ; Department of Translational Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Sang-Hyun Song
- Cancer Research Institute, Seoul National University, Seoul, Korea
| | - Sang Gyun Kim
- Cancer Research Institute, Seoul National University, Seoul, Korea
| | - Hyun-Ah Kim
- Cancer Research Institute, Seoul National University, Seoul, Korea
| | - Hee-Jun Kim
- Cancer Research Institute, Seoul National University, Seoul, Korea ; Department of Internal Medicine, Chung-Ang University College of Medicine, Seoul, Korea
| | - Do-Youn Oh
- Cancer Research Institute, Seoul National University, Seoul, Korea ; Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Hyun-Soon Jong
- Cancer Research Institute, Seoul National University, Seoul, Korea
| | - Tae-You Kim
- Cancer Research Institute, Seoul National University, Seoul, Korea ; Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea ; Department of Translational Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Yung-Jue Bang
- Cancer Research Institute, Seoul National University, Seoul, Korea ; Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| |
Collapse
|