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Liu G, Wang H, Ran R, Wang Y, Li Y. FOSL1 transcriptionally regulates PHLDA2 to promote 5-FU resistance in colon cancer cells. Pathol Res Pract 2023; 246:154496. [PMID: 37178619 DOI: 10.1016/j.prp.2023.154496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 04/11/2023] [Accepted: 04/29/2023] [Indexed: 05/15/2023]
Abstract
BACKGROUND Tumor drug resistance is a leading cause of tumor treatment failure. To date, the association between FOS-Like antigen-1 (FOSL1) and chemotherapy sensitivity in colon cancer is unclear. The present study investigated the molecular mechanism of FOSL1 regulating 5-Fluorouracil (5-FU) resistance in colon cancer. METHODS FOSL1 expression in colon cancer was analyzed by bioinformatics methods, and its downstream regulatory factors were predicted. Pearson correlation analyzed the expression of FOSL1 and downstream regulatory gene. Meanwhile, the expression of FOSL1 and its downstream factor Pleckstrin Homology-Like Domain Family A Member 2 (PHLDA2) in colon cancer cell lines was measured by qRT-PCR and western blot. The regulatory relationship between FOSL1 and PHLDA2 was verified by chromatin immunoprecipitation (ChIP) assay and dual-luciferase reporter assay. The effects of the FOSL1/PHLDA2 axis on the resistance in colon cancer cells to 5-FU were analyzed by cell experiments. RESULTS FOSL1 expression was evidently up-regulated in colon cancer and 5-FU resistant cells. FOSL1 was positively correlated with PHLDA2 in colon cancer. In vitro cell assays showed that low expression of FOSL1 significantly enhanced 5-FU sensitivity in colon cancer cells, significantly suppressed the proliferation of cancer cells, and induced apoptosis. Overexpression of FOSL1 presented the opposite regulatory trend. Mechanistically, FOSL1 activated PHLDA2 and up-regulated its expression. Moreover, by activating glycolysis, PHLDA2 promoted 5-Fu resistance and cell proliferation, and reduced cell apoptosis in colon cancer. CONCLUSION Down-regulated FOSL1 expression could enhance the 5-FU sensitivity of colon cancer cells, and FOSL1/PHLDA2 axis may be an effective target for overcoming chemotherapy resistance in colon cancer.
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Affiliation(s)
- Guangyi Liu
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, PR China
| | - Huan Wang
- Department of Health Management Center, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, PR China
| | - Rui Ran
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, PR China
| | - Yicheng Wang
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, PR China
| | - Yang Li
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, PR China.
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Li L, Wang N, Xiong Y, Guo G, Zhu M, Gu Y. Transcription Factor FOSL1 Enhances Drug Resistance of Breast Cancer Through DUSP7-Mediated Dephosphorylation of PEA15. Mol Cancer Res 2021; 20:515-526. [PMID: 34907034 DOI: 10.1158/1541-7786.mcr-21-0658] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 11/02/2021] [Accepted: 12/07/2021] [Indexed: 11/16/2022]
Abstract
Breast cancer (BC) represents one of the commonest and deadliest malignancies in women. However, drug resistance has always been a major obstacle to cancer treatment. Transcription factors have been reported to have close association with drug resistance of tumors. Recently, by analyzing the data from Gene Expression Omnibus (GEO) database (id: GSE76540), we found that transcription factor FOSL1 was significantly up-regulated in the transcriptome of doxorubicin-resistant BC cells compared with that in sensitive parental cells. Therefore, we aim to explore the regulatory mechanism of FOSL1 in affecting the drug resistance of BC cells. FOSL1 expression in doxorubicin-resistant BC cells was firstly examined through RT-qPCR, and then its influence on the drug resistance of BC cells was explored through a series of in vitro and in vivo mechanism assays. Results showed that FOSL1 promoted the drug resistance of BC cells to doxorubicin both in intro and in vivo. It positively regulated the transcription of DUSP7 in BC doxorubicin-resistant cells and DUSP7 also enhanced the drug resistance of BC cells. Furthermore, FOSL1 promoted the dephosphorylation of PEA15 through DUSP7. In conclusion, it was verified that FOSL1 promoted the drug resistance in breast cancer through DUSP7-mediated dephosphorylation of PEA15. Implications: These initial findings suggest that the FOSL1/DUSP7/PEA15 pathway may provide a theoretical guidance for BC treatment.
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Affiliation(s)
- Lin Li
- First Affiliated Hospital of Zhengzhou University
| | - Nan Wang
- First Affiliated Hospital of Zhengzhou University
| | - Youyi Xiong
- First Affiliated Hospital of Zhengzhou University
| | | | - Mingzhi Zhu
- First Affiliated Hospital of Zhengzhou University
| | - Yuanting Gu
- Department of Breast Surgery, First Affiliated Hospital of Zhengzhou University
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Saikosaponin-D Alleviates Renal Inflammation and Cell Apoptosis in a Mouse Model of Sepsis via TCF7/FOSL1/MMP9 Inhibition. Mol Cell Biol 2021; 41:e0033221. [PMID: 34309413 DOI: 10.1128/mcb.00332-21] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Evidence exists reporting that Saikosaponin-d can prevent experimental sepsis, and this study aims to illustrate the molecular events underlying its renoprotective effects on lipopolysaccharide (LPS)-induced renal inflammation simulating sepsis. Through network pharmacology analysis and bioinformatics analysis, we identified that saikosaponin-d may influence sepsis development by mediating TCF7. Dual luciferase reporter gene and ChIP assays were used to explore the interactions between TCF7, FOSL1 and MMP9. The experimental data suggested that Saikosaponin-d attenuated LPS-induced renal injury, as evidenced by reduced the production of proinflammatory cytokines as well as cell apoptosis in the renal tissues of LPS-induced mice. Mechanically, Saikosaponin-d inhibited FOSL1 by inhibiting TCF7, which reduced the expression of inflammatory factors in renal cells. TCF7 activated the FOSL1 expression and consequently promoted the expression of MMP9. Also, Saikosaponin-d reduced cell apoptosis and the expression of inflammatory factors by inhibiting the TCF7/FOSL1/MMP9 axis in vivo. In conclusion, Saikosaponin-d suppresses FOSL1 transcription by downregulating TCF7, thereby inhibiting MMP9 expression and ultimately reducing the renal inflammation and cell apoptosis induced by sepsis.
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Shen S, Li K, Liu Y, Liu X, Liu B, Ba Y, Xing W. Silencing lncRNA AGAP2-AS1 Upregulates miR-195-5p to Repress Migration and Invasion of EC Cells via the Decrease of FOSL1 Expression. MOLECULAR THERAPY. NUCLEIC ACIDS 2020; 20:331-344. [PMID: 32199129 PMCID: PMC7082499 DOI: 10.1016/j.omtn.2019.12.036] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Revised: 12/26/2019] [Accepted: 12/27/2019] [Indexed: 12/25/2022]
Abstract
The interaction of long non-coding RNAs (lncRNAs), microRNAs (miRNAs), and mRNAs has been implicated in various types of cancers, including esophageal cancer (EC). The current study aimed to investigate the role of AGAP2-AS1/miR-195-5p/Fos-like antigen-1 (FOSL1) in EC progression. The expression of AGAP2-AS1, miR-195-5p, and FOSL1 in tumor tissues isolated from EC patients and EC cell lines was determined by quantitative reverse transcriptase polymerase chain reaction (qRT-PCR), the results of which illustrated that AGAP2-AS1 and FOSL1 were increased while miR-195-5p was reduced in EC. Next, the ectopic expression, knockdown, and reporter assay experiments were all employed to elucidate the mechanism of AGAP2-AS1/miR-195-5p/FOSL1 in the processes of EC cell proliferation, cell cycle, apoptosis, invasion, and migration as well as tumor growth. Knockdown of AGAP2-AS1 or overexpression of miR-195-5p reduced EC cell proliferation, migration, and invasion, blocked cell cycle entry, and elevated apoptosis. FOSL1 was found to be specifically targeted by miR-195-5p. AGAP2-AS1 was observed to upregulate FOSL1 by binding to miR-195-5p. Silencing of AGAP2-AS1 was observed to restrain the development of EC both in vitro and in vivo through upregulating miR-195-5p and downregulating FOSL1. Taken together, AGAP2-AS1 knockdown exercises suppressive effects on the development of EC through miR-195-5p-dependent downregulation of FOSL1. Therefore, targeting AGAP2-AS1 could be a future direction to develop a novel molecule-targeted therapeutic strategy for EC.
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Affiliation(s)
- Sining Shen
- Department of Thoracic Surgery, Affiliated Cancer Hospital of Zhengzhou University (Henan Cancer Hospital), Zhengzhou 450008, P.R. China.
| | - Ke Li
- Department of Oncology, Affiliated Cancer Hospital of Zhengzhou University (Henan Cancer Hospital), Zhengzhou 450008, P.R. China
| | - Ying Liu
- Department of Oncology, Affiliated Cancer Hospital of Zhengzhou University (Henan Cancer Hospital), Zhengzhou 450008, P.R. China
| | - Xianben Liu
- Department of Thoracic Surgery, Affiliated Cancer Hospital of Zhengzhou University (Henan Cancer Hospital), Zhengzhou 450008, P.R. China
| | - Baoxing Liu
- Department of Thoracic Surgery, Affiliated Cancer Hospital of Zhengzhou University (Henan Cancer Hospital), Zhengzhou 450008, P.R. China
| | - Yufeng Ba
- Department of Thoracic Surgery, Affiliated Cancer Hospital of Zhengzhou University (Henan Cancer Hospital), Zhengzhou 450008, P.R. China
| | - Wenqun Xing
- Department of Thoracic Surgery, Affiliated Cancer Hospital of Zhengzhou University (Henan Cancer Hospital), Zhengzhou 450008, P.R. China
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Han Y, Zhao X, Sun Y, Sui Y, Liu J. Retracted
: Effects of FOSL1 silencing on osteosarcoma cell proliferation, invasion and migration through the ERK/AP‐1 signaling pathway. J Cell Physiol 2018; 234:3598-3612. [DOI: 10.1002/jcp.27048] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Accepted: 06/26/2018] [Indexed: 12/28/2022]
Affiliation(s)
- Yu Han
- Joint Surgery Department No.1 Hospital of Jilin University Changchun China
| | - Xingyu Zhao
- Joint Surgery Department No.1 Hospital of Jilin University Changchun China
| | - Yifu Sun
- Jilin Provincial Key Laboratory for Molecular Biology of Special Economic Animals Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences Beijing China
| | - Yutong Sui
- Jilin Provincial Key Laboratory for Molecular Biology of Special Economic Animals Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences Beijing China
| | - Jianguo Liu
- Joint Surgery Department No.1 Hospital of Jilin University Changchun China
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Shao L, Jing W, Wang L, Pan F, Wu L, Zhang L, Yang P, Hu M, Fan K. LRP16 prevents hepatocellular carcinoma progression through regulation of Wnt/β-catenin signaling. J Mol Med (Berl) 2018; 96:547-558. [PMID: 29748698 DOI: 10.1007/s00109-018-1639-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 03/18/2018] [Accepted: 04/11/2018] [Indexed: 02/07/2023]
Abstract
UNLABELLED Elevated LRP16 expression is associated with poor clinical outcomes in multiple malignancies. We detected LRP16 expression in hepatocellular carcinoma (HCC) and found that it was downregulated in tumor samples and HCC cell lines. In a cohort of 80 HCC patients, high level of LRP16 expression in HCC tumors was associated with well differentiation, less lymph node metastasis, and good overall survival (OS). Overexpression of LRP16 in the HepG2 and MHCC-97L cell lines increased cell apoptosis, attenuated cell proliferation, migration, and invasion ability in vitro, and drastically diminished tumor growth and metastasis in vivo. Silencing LRP16 in HCC-LM3 and SMMC-7721 cell lines showed opposite results. Microarray evaluation of tumor cells overexpressing LRP16 revealed the effects on decreased activity in the Wnt signaling pathway. These results were confirmed by qRT-PCR and Western blots. Furthermore, inhibition of Wnt signaling decreased proliferation, migration, and invasion of HCC cell lines. Mechanism conducted showed that LRP16 overexpression could prevent β-catenin from entering the nucleus. Our study demonstrated that LRP16 suppresses tumor growth in HCC by modulating Wnt/β-catenin signaling. KEY MESSAGES LRP16 was low expression in HCC tissue and cell lines. Low expression of LRP16 in HCC was associated with poor prognosis. LRP16 inhibits activation of the Wnt/β-catenin pathway in HCC. LRP16 prevents β-catenin from entering the nucleus.
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Affiliation(s)
- Lijuan Shao
- Department of Immunology, School of Medicine, Nankai University, Tianjin, 300071, People's Republic of China
- PLA General Hospital Cancer Center, PLA Postgraduate School of Medicine, Beijing, 100001, People's Republic of China
- International Joint Cancer Institute, The Second Military Medical University, Shanghai, 200433, People's Republic of China
| | - Wei Jing
- Department of General Surgery, Changhai Hospital, The Second Military Medical University, 800 Xiangyin Road, Shanghai, 200040, People's Republic of China
| | - Lingxiong Wang
- PLA General Hospital Cancer Center, PLA Postgraduate School of Medicine, Beijing, 100001, People's Republic of China
| | - Fei Pan
- PLA General Hospital Cancer Center, PLA Postgraduate School of Medicine, Beijing, 100001, People's Republic of China
| | - Liangliang Wu
- PLA General Hospital Cancer Center, PLA Postgraduate School of Medicine, Beijing, 100001, People's Republic of China
| | - Lijun Zhang
- PLA General Hospital Cancer Center, PLA Postgraduate School of Medicine, Beijing, 100001, People's Republic of China
| | - Pan Yang
- Department of Stomatology, the First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou, 510080, People's Republic of China
| | - Minggen Hu
- PLA General Hospital Cancer Center, PLA Postgraduate School of Medicine, Beijing, 100001, People's Republic of China.
| | - Kexing Fan
- PLA General Hospital Cancer Center, PLA Postgraduate School of Medicine, Beijing, 100001, People's Republic of China.
- International Joint Cancer Institute, The Second Military Medical University, Shanghai, 200433, People's Republic of China.
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Hoeflich KP, Guan J, Edgar KA, O'Brien C, Savage H, Wilson TR, Neve RM, Friedman LS, Wallin JJ. The PI3K inhibitor taselisib overcomes letrozole resistance in a breast cancer model expressing aromatase. Genes Cancer 2016; 7:73-85. [PMID: 27382432 PMCID: PMC4918946 DOI: 10.18632/genesandcancer.100] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Letrozole is a commonly used treatment option for metastatic hormone receptor-positive (HR+) breast cancer, but many patients ultimately relapse. Due to the importance of phosphoinositide-3 kinase (PI3K) in breast cancer, PI3K inhibitors such as taselisib are attractive for combination with endocrine therapies such as letrozole. Taselisib was evaluated as a single agent and in combination with letrozole in a breast cancer cell line engineered to express aromatase. The combination of taselisib and letrozole decreased cellular viability and increased apoptosis relative to either single agent. Signaling cross-talk between the PI3K and ER pathways was associated with efficacy for the combination. In a secreted factor screen, multiple soluble factors, including members of the epidermal and fibroblast growth factor families, rendered breast cancer cells non-responsive to letrozole. It was discovered that many of these factors signal through the PI3K pathway and cells remained sensitive to taselisib in the presence of the soluble factors. We also found that letrozole resistant lines have elevated PI3K pathway signaling due to an increased level of p110α, but are still sensitive to taselisib. These data provide rationale for clinical evaluation of PI3K inhibitors to overcome resistance to endocrine therapies in ER+ breast cancer.
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Affiliation(s)
- Klaus P Hoeflich
- Department of Translational Oncology, Genentech, Inc., South San Francisco, CA, USA
| | - Jane Guan
- Department of Translational Oncology, Genentech, Inc., South San Francisco, CA, USA
| | - Kyle A Edgar
- Department of Translational Oncology, Genentech, Inc., South San Francisco, CA, USA
| | - Carol O'Brien
- Department of Oncology Biomarker Development, Genentech, Inc., South San Francisco, CA, USA
| | - Heidi Savage
- Department of Oncology Biomarker Development, Genentech, Inc., South San Francisco, CA, USA
| | - Timothy R Wilson
- Department of Oncology Biomarker Development, Genentech, Inc., South San Francisco, CA, USA
| | - Richard M Neve
- Department of Molecular Biology, Genentech, Inc., South San Francisco, CA, USA
| | - Lori S Friedman
- Department of Translational Oncology, Genentech, Inc., South San Francisco, CA, USA
| | - Jeffrey J Wallin
- Department of Translational Oncology, Genentech, Inc., South San Francisco, CA, USA
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UMADEVI S, PREMKUMAR K, VALARMATHI S, AYYASAMY PM, RAJAKUMAR S. IDENTIFICATION OF NOVEL GENES RELATED TO DIABETIC RETINOPATHY USING PROTEIN–PROTEIN INTERACTION NETWORK AND GENE ONTOLOGIES. J BIOL SYST 2016. [DOI: 10.1142/s0218339016500066] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Diabetic retinopathy is the most common cause of blindness, associated with many biochemical pathways mediated by several genes and proteins. Disease gene identification can be achieved through several approaches but still it is a challenging task. This study, aimed to find out the novel genes associated with diabetic retinopathy. In this study, all the well-known genes associated with diabetic retinopathy were collected from databases and the protein interaction partners were identified. The interacting candidate genes were chosen by chromosomal locations, sharing with disease genes. The protein–protein interaction network was constructed and the key nodes (genes) were identified by degree, betweenness centrality, closeness centrality and eccentricity centrality. Further, the ontological terms, molecular function, biological process and cellular components were related with that of the disease genes with p-value [Formula: see text]. The genes UBC, FOS, ITGB1, FOXA2, CCND1, FOSL1, RXRA and NCAM1 were identified as potential genes associated with diabetic retinopathy. The molecular functions of these genes include protein binding, receptor activity, receptor binding, oxidoreductase activity, protein kinase activity, serine-type peptidase activity and growth factor. Many of the identified genes were clinically related as evidence by the literature.
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Affiliation(s)
- S. UMADEVI
- Department of Biomedical Science, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India
| | - K. PREMKUMAR
- Department of Biomedical Science, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India
| | - S. VALARMATHI
- Department of Biochemistry, PSG College of Arts and Science, Coimbatore 641014, Tamil Nadu, India
| | - P. M. AYYASAMY
- Department of Microbiology, Periyar University, Salem 636011, Tamil Nadu, India
| | - S. RAJAKUMAR
- Department of Marine Biotechnology, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India
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Hoppe B, Pietsch S, Franke M, Engel S, Groth M, Platzer M, Englert C. MiR-21 is required for efficient kidney regeneration in fish. BMC DEVELOPMENTAL BIOLOGY 2015; 15:43. [PMID: 26577279 PMCID: PMC4650918 DOI: 10.1186/s12861-015-0089-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 10/25/2015] [Indexed: 01/20/2023]
Abstract
Background Acute kidney injury in mammals, which is caused by cardiovascular diseases or the administration of antibiotics with nephrotoxic side-effects is a life-threatening disease, since loss of nephrons is irreversible in mammals. In contrast, fish are able to generate new nephrons even in adulthood and thus provide a good model to study renal tubular regeneration. Results Here, we investigated the early response after gentamicin-induced renal injury, using the short-lived killifish Nothobranchius furzeri. A set of microRNAs was differentially expressed after renal damage, among them miR-21, which was up-regulated. A locked nucleic acid-modified antimiR-21 efficiently knocked down miR-21 activity and caused a lag in the proliferative response, enhanced apoptosis and an overall delay in regeneration. Transcriptome profiling identified apoptosis as a process that was significantly affected upon antimiR-21 administration. Together with functional data this suggests that miR-21 acts as a pro-proliferative and anti-apoptotic factor in the context of kidney regeneration in fish. Possible downstream candidate genes that mediate its effect on proliferation and apoptosis include igfbp3 and fosl1, among other genes. Conclusion In summary, our findings extend the role of miR-21 in the kidney. For the first time we show its functional involvement in regeneration indicating that fast proliferation and reduced apoptosis are important for efficient renal tubular regeneration. Electronic supplementary material The online version of this article (doi:10.1186/s12861-015-0089-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Beate Hoppe
- Molecular Genetics Laboratory, Leibniz Institute on Aging - Fritz Lipmann Institute (FLI), Beutenbergstrasse 11, 07745, Jena, Germany
| | - Stefan Pietsch
- Molecular Genetics Laboratory, Leibniz Institute on Aging - Fritz Lipmann Institute (FLI), Beutenbergstrasse 11, 07745, Jena, Germany
| | - Martin Franke
- Molecular Genetics Laboratory, Leibniz Institute on Aging - Fritz Lipmann Institute (FLI), Beutenbergstrasse 11, 07745, Jena, Germany.,Present address: Research Group of Development & Disease, Max Planck Institute for Molecular Genetics, 14195, Berlin, Germany.,Institute for Medical and Human Genetics, Charité Universitätsmedizin Berlin, 13353, Berlin, Germany
| | - Sven Engel
- Molecular Genetics Laboratory, Leibniz Institute on Aging - Fritz Lipmann Institute (FLI), Beutenbergstrasse 11, 07745, Jena, Germany
| | - Marco Groth
- Genome Analysis, Leibniz Institute on Aging - Fritz Lipmann Institute (FLI), Beutenbergstrasse 11, 07745, Jena, Germany
| | - Matthias Platzer
- Genome Analysis, Leibniz Institute on Aging - Fritz Lipmann Institute (FLI), Beutenbergstrasse 11, 07745, Jena, Germany
| | - Christoph Englert
- Molecular Genetics Laboratory, Leibniz Institute on Aging - Fritz Lipmann Institute (FLI), Beutenbergstrasse 11, 07745, Jena, Germany. .,Faculty of Biology and Pharmacy, Friedrich Schiller University of Jena, Fürstengraben 1, 07743, Jena, Germany.
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Qin S, Ma F, Chen L. Gene regulatory networks by transcription factors and microRNAs in breast cancer. ACTA ACUST UNITED AC 2014; 31:76-83. [PMID: 25189779 DOI: 10.1093/bioinformatics/btu597] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
MOTIVATION Gene regulatory networks (GRNs) affect numerous cellular processes and every process of life, and abnormalities of GRN lead to breast cancer. Transcription factors (TFs) and microRNAs (miRNAs) are two of the best-studied gene regulatory mechanisms. However, the architecture and feature of GRNs by TFs and miRNAs in breast cancer and its subtypes were unknown. In this study, we investigated the GRNs by TFs and miRNAs with emphasis on breast cancer classifier genes at system level.
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Affiliation(s)
- Sheng Qin
- The Key Laboratory of Developmental Genes and Human Disease, Ministry of Education, Institute of Life Science, Southeast University Nanjing 210096, China and Laboratory for Comparative Genomics and Bioinformatics & Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Science, Nanjing Normal University, Nanjing 210046, China The Key Laboratory of Developmental Genes and Human Disease, Ministry of Education, Institute of Life Science, Southeast University Nanjing 210096, China and Laboratory for Comparative Genomics and Bioinformatics & Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Science, Nanjing Normal University, Nanjing 210046, China
| | - Fei Ma
- The Key Laboratory of Developmental Genes and Human Disease, Ministry of Education, Institute of Life Science, Southeast University Nanjing 210096, China and Laboratory for Comparative Genomics and Bioinformatics & Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Science, Nanjing Normal University, Nanjing 210046, China
| | - Liming Chen
- The Key Laboratory of Developmental Genes and Human Disease, Ministry of Education, Institute of Life Science, Southeast University Nanjing 210096, China and Laboratory for Comparative Genomics and Bioinformatics & Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Science, Nanjing Normal University, Nanjing 210046, China
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John K, Lahoti TS, Wagner K, Hughes JM, Perdew GH. The Ah receptor regulates growth factor expression in head and neck squamous cell carcinoma cell lines. Mol Carcinog 2013; 53:765-76. [PMID: 23625689 DOI: 10.1002/mc.22032] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Revised: 03/11/2013] [Accepted: 03/12/2013] [Indexed: 12/25/2022]
Abstract
Previous studies in head and neck squamous cell carcinoma (HNSCC) cell lines have revealed that the Ah receptor (AHR) plays a significant role in mediating the "aggressive" phenotype of these cells, which includes enhanced inflammatory signaling (e.g., IL6) and migratory potential. Here we sought to identify putative novel targets of the AHR associated with enhanced tumor invasiveness. Global gene expression analysis identified a number of genes that are repressed upon treatment of OSC-19 or HN30 cells with an AHR antagonist. Three growth factors were targets of AHR activity; amphiregulin (AREG), epiregulin (EREG), and platelet-derived growth factor A (PDGFA) were repressed by an AHR antagonist and further examined. Quantitative PCR analysis, ELISA, and siRNA-mediated knock down of AHR revealed an attenuation of basal and/or induced levels of expression of these growth factors in two HNSCC lines, following AHR antagonism. In silico analysis revealed that these growth factors possess dioxin-like response elements. Two other AHR ligands, 6-formylindolo[3,2-b]carbazole and benzo(a)pyrene (BP) also elicited similar responses. In conclusion, this study identified AREG, EREG, and PDGFA as growth factor targets of AHR activity associated with metastatic phenotype of HNSCC cells, suggesting that attenuation of AHR activity may be a therapeutic strategy.
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Affiliation(s)
- Kaarthik John
- Center for Molecular Toxicology and Carcinogenesis and the Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, Pennsylvania; DuPont Haskell Global Centers for Health and Environmental Sciences, Newark, Delaware
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12
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Ghosh D, Li Z, Tan XF, Lim TK, Mao Y, Lin Q. iTRAQ based quantitative proteomics approach validated the role of calcyclin binding protein (CacyBP) in promoting colorectal cancer metastasis. Mol Cell Proteomics 2013; 12:1865-80. [PMID: 23543800 DOI: 10.1074/mcp.m112.023085] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Keeping continuity with our previous study that revealed direct correlations between CRC metastasis and enhanced CacyBP protein levels, here we attempt to improve our understanding of the mechanisms involved within this enigmatic process. Overexpression of CacyBP (CacyBP-OE) in primary CRC cell and its knock down (CacyBP-KD) in the metastatic CRC cells revealed (through phenotypic studies) the positive impact of the protein on metastasis. Additionally, two individual 4-plex iTRAQ based comparative proteomics experiments were carried out on the CacyBP-OE and CacyBP-KD cells, each with two biological replicates. Mining of proteomics data identified total 279 (63.80% up-regulated and 36.20% down-regulated) proteins to be significantly altered in expression level for the OE set and in the KD set, this number was 328 (48.78% up-regulated and 51.22% down-regulated). Functional implications of these significantly regulated proteins were related to metastatic phenotypes such as cell migration, invasion, adhesion and proliferation. Gene ontology analysis identified integrin signaling as the topmost network regulated within CacyBP-OE. Further detection of caveolar mediated endocytosis in the top hit list correlated this phenomenon with the dissociation of integrins from the focal adhesion complex which are known to provide the traction force for cell movement when transported back to the leading edge. This finding was further supported by the data obtained from CacyBP-KD data set showing down-regulation of proteins necessary for integrin endocytosis. Furthermore, intracellular calcium levels (known to influence integrin mediated cell migration) were found to be lowered in CacyBP-KD cells indicating decreased cell motility and vice versa for the CacyBP-OE cells. Actin nucleation by ARP-WASP complex, known to promote cell migration, was also identified as one of the top regulated pathways in CacyBP-OE cells. In short, this study presents CacyBP as a promising candidate biomarker for CRC metastasis and also sheds light on the underlying molecular mechanism by which CacyBP promotes CRC metastasis.
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Affiliation(s)
- Dipanjana Ghosh
- Department of Biological Sciences, National University of Singapore, Singapore
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Sas-Chen A, Avraham R, Yarden Y. A crossroad of microRNAs and immediate early genes (IEGs) encoding oncogenic transcription factors in breast cancer. J Mammary Gland Biol Neoplasia 2012; 17:3-14. [PMID: 22327345 DOI: 10.1007/s10911-012-9243-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2011] [Accepted: 01/26/2012] [Indexed: 02/07/2023] Open
Abstract
Signaling networks are involved in development, as well as in malignancy of the mammary gland. Distinct external stimuli activate intricate signaling cascades, which culminate in the activation of specific transcriptional programs. These signal-specific transcriptional programs are instigated by transcription factors (TFs) encoded by the immediate early genes (IEGs), and they lead to diverse cellular outcomes, including oncogenesis. Hence, regulating the expression of IEGs is of great importance, and involves several complementary transcriptional and posttranscriptional mechanisms, the latter entails also microRNAs (miRNAs). miRNAs are a class of non-coding RNAs, which have been implicated in regulation of various aspects of signaling networks. Through examination of the basic characteristics of miRNA function, we highlight the benefits of using miRNAs as regulators of early TFs and signaling networks. We further focus on the role of miRNAs as regulators of IEGs, which shape the initial steps of signaling-induced transcription. We especially emphasize the role of miRNAs in buffering external noise and maintaining low basal activation of IEGs in the absence of proper stimuli.
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Affiliation(s)
- Aldema Sas-Chen
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot, 76100, Israel
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