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Elkhadragy L, Myers A, Long W. Role of the Atypical MAPK ERK3 in Cancer Growth and Progression. Cancers (Basel) 2024; 16:1381. [PMID: 38611058 PMCID: PMC11011113 DOI: 10.3390/cancers16071381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Revised: 03/23/2024] [Accepted: 03/27/2024] [Indexed: 04/14/2024] Open
Abstract
Extracellular signal-regulated kinase 3 (ERK3) is an atypical mitogen-activated protein kinase (MAPK) whose structural and regulatory features are distinct from those of conventional MAPKs, such as ERK1/2. Since its identification in 1991, the regulation, substrates and functions of ERK3 have remained largely unknown. However, recent years have witnessed a wealth of new findings about ERK3 signaling. Several important biological functions for ERK3 have been revealed, including its role in neuronal morphogenesis, inflammation, metabolism, endothelial cell tube formation and epithelial architecture. In addition, ERK3 has been recently shown to play important roles in cancer cell proliferation, migration, invasion and chemoresistance in multiple types of cancers. Furthermore, accumulating studies have uncovered various molecular mechanisms by which the expression level, protein stability and activity of ERK3 are regulated. In particular, several post-translational modifications (PTMs), including ubiquitination, hydroxylation and phosphorylation, have been shown to regulate the stability and activity of ERK3 protein. In this review, we discuss recent findings regarding biochemical and cellular functions of ERK3, with a main focus on its roles in cancers, as well as the molecular mechanisms of regulating its expression and activity.
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Affiliation(s)
- Lobna Elkhadragy
- Department of Biochemistry and Molecular Biology, Boonshoft School of Medicine, Wright State University, Dayton, OH 45435, USA; (L.E.); (A.M.)
- Department of Radiology, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Amanda Myers
- Department of Biochemistry and Molecular Biology, Boonshoft School of Medicine, Wright State University, Dayton, OH 45435, USA; (L.E.); (A.M.)
| | - Weiwen Long
- Department of Biochemistry and Molecular Biology, Boonshoft School of Medicine, Wright State University, Dayton, OH 45435, USA; (L.E.); (A.M.)
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2
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Wang CY, Yu GT, Gao C, Chen J, Li QL, Zhang L, Wu M, Sun ZJ, Li LY. Genome-Wide Enhancer Analysis Reveals the Role of AP-1 Transcription Factor in Head and Neck Squamous Cell Carcinoma. Front Mol Biosci 2021; 8:701531. [PMID: 34409068 PMCID: PMC8365880 DOI: 10.3389/fmolb.2021.701531] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 06/28/2021] [Indexed: 01/11/2023] Open
Abstract
Head and neck squamous cell carcinoma (HNSCC) is one of the most common cancers in the world, but its epigenomic features have not been determined. Here, we studied the chromatin landscape of active enhancers of HNSCC head tumor tissues by performing H3K27ac and H3K4me1 ChIP-Seq with a Tgfbr1/Pten double conditional knockout HNSCC mouse model. We identified 1,248 gain variant enhancer loci (VELs) and 2,188 lost VELs, as well as 153 gain variant super enhancer loci (VSELs) and 234 lost VSELs. Potentially involved transcription factors were predicted with motif analysis, and we identified AP-1 as one of the critical oncogenic transcription factors in HNSCC and many other types of cancer. Combining transcriptomic and epigenomic data, our analysis also showed that AP-1 and histone modifications coordinately regulate target gene expression in HNSCC. In conclusion, our study provides important epigenomic information for enhancer studies in HNSCC and reveals new mechanism for AP-1 regulating HNSCC.
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Affiliation(s)
- Chen-Yu Wang
- Frontier Science Center for Immunology and Metabolism, College of Life Sciences, Hubei Key Laboratory of Cell Homeostasis, Hubei Key Laboratory of Developmentally Originated Disease, Hubei Key Laboratory of Enteropathy, Wuhan University, Wuhan, China
| | - Guang-Tao Yu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine, Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Chuan Gao
- Frontier Science Center for Immunology and Metabolism, College of Life Sciences, Hubei Key Laboratory of Cell Homeostasis, Hubei Key Laboratory of Developmentally Originated Disease, Hubei Key Laboratory of Enteropathy, Wuhan University, Wuhan, China
| | - Ji Chen
- Frontier Science Center for Immunology and Metabolism, College of Life Sciences, Hubei Key Laboratory of Cell Homeostasis, Hubei Key Laboratory of Developmentally Originated Disease, Hubei Key Laboratory of Enteropathy, Wuhan University, Wuhan, China
| | - Qing-Lan Li
- Frontier Science Center for Immunology and Metabolism, College of Life Sciences, Hubei Key Laboratory of Cell Homeostasis, Hubei Key Laboratory of Developmentally Originated Disease, Hubei Key Laboratory of Enteropathy, Wuhan University, Wuhan, China
| | - Lu Zhang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine, Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Min Wu
- Frontier Science Center for Immunology and Metabolism, College of Life Sciences, Hubei Key Laboratory of Cell Homeostasis, Hubei Key Laboratory of Developmentally Originated Disease, Hubei Key Laboratory of Enteropathy, Wuhan University, Wuhan, China
| | - Zhi-Jun Sun
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine, Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Lian-Yun Li
- Frontier Science Center for Immunology and Metabolism, College of Life Sciences, Hubei Key Laboratory of Cell Homeostasis, Hubei Key Laboratory of Developmentally Originated Disease, Hubei Key Laboratory of Enteropathy, Wuhan University, Wuhan, China
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Alshammari ES, Aljagthmi AA, Stacy AJ, Bottomley M, Shamma HN, Kadakia MP, Long W. ERK3 is transcriptionally upregulated by ∆Np63α and mediates the role of ∆Np63α in suppressing cell migration in non-melanoma skin cancers. BMC Cancer 2021; 21:155. [PMID: 33579235 PMCID: PMC7881562 DOI: 10.1186/s12885-021-07866-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 02/02/2021] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND p63, a member of the p53 gene family, is an important regulator for epithelial tissue growth and development. ∆Np63α is the main isoform of p63 and highly expressed in Non-melanoma skin cancer (NMSC). Extracellular signal-regulated kinase 3 (ERK3) is an atypical mitogen-activated protein kinase (MAPK) whose biochemical features and cellular regulation are distinct from those of conventional MAPKs such as ERK1/2. While ERK3 has been shown to be upregulated in lung cancers and head and neck cancers, in which it promotes cancer cell migration and invasion, little is known about the implication of ERK3 in NMSCs. METHODS Fluorescent immunohistochemistry was performed to evaluate the expression levels of ΔNp63α and ERK3 in normal and NMSC specimens. Dunnett's test was performed to compare mean fluorescence intensity (MFI, indicator of expression levels) of p63 or ERK3 between normal cutaneous samples and NMSC samples. A mixed effects (ANOVA) test was used to determine the correlation between ΔNp63α and ERK3 expression levels (MFI). The regulation of ERK3 by ΔNp63α was studied by qRT-PCR, Western blot and luciferase assay. The effect of ERK3 regulation by ΔNp63α on cell migration was measured by performing trans-well migration assay. RESULTS The expression level of ∆Np63α is upregulated in NMSCs compared to normal tissue. ERK3 level is significantly upregulated in AK and SCC in comparison to normal tissue and there is a strong positive correlation between ∆Np63α and ERK3 expression in normal skin and skin specimens of patients with AK, SCC or BCC. Further, we found that ∆Np63α positively regulates ERK3 transcript and protein levels in A431 and HaCaT skin cells, underlying the upregulation of ERK3 expression and its positive correlation with ∆Np63α in NMSCs. Moreover, similar to the effect of ∆Np63α depletion, silencing ERK3 greatly enhanced A431 cell migration. Restoration of ERK3 expression under the condition of silencing ∆Np63α counteracted the increase in cell migration induced by the depletion of ∆Np63α. Mechanistically, ERK3 inhibits the phosphorylation of Rac1 G-protein and the formation of filopodia of A431 skin SCC cells. CONCLUSIONS ERK3 is positively regulated by ∆Np63α and mediates the role of ∆Np63α in suppressing cell migration in NMSC.
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Affiliation(s)
- Eid S Alshammari
- Department of Biochemistry and Molecular Biology, Boonshoft School of Medicine, Wright State University, 112 Diggs Laboratory, 3640 Colonel Glenn Highway, Dayton, OH, 45435, USA.,Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Jouf University, Sakakah, 72388, Saudi Arabia
| | - Amjad A Aljagthmi
- Department of Biochemistry and Molecular Biology, Boonshoft School of Medicine, Wright State University, 112 Diggs Laboratory, 3640 Colonel Glenn Highway, Dayton, OH, 45435, USA
| | - Andrew J Stacy
- Department of Biochemistry and Molecular Biology, Boonshoft School of Medicine, Wright State University, 112 Diggs Laboratory, 3640 Colonel Glenn Highway, Dayton, OH, 45435, USA
| | - Mike Bottomley
- Department of Math and Microbiology, College of Science and Mathematics, Wright State University, Dayton, OH, 45435, USA
| | - H Nicholas Shamma
- Department of Dermatology, Boonshoft School of Medicine, Wright State University, 3640 Colonel Glenn Highway, Dayton, OH, 45435, USA
| | - Madhavi P Kadakia
- Department of Biochemistry and Molecular Biology, Boonshoft School of Medicine, Wright State University, 112 Diggs Laboratory, 3640 Colonel Glenn Highway, Dayton, OH, 45435, USA.
| | - Weiwen Long
- Department of Biochemistry and Molecular Biology, Boonshoft School of Medicine, Wright State University, 112 Diggs Laboratory, 3640 Colonel Glenn Highway, Dayton, OH, 45435, USA.
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Elkhadragy L, Alsaran H, Morel M, Long W. Activation loop phosphorylation of ERK3 is important for its kinase activity and ability to promote lung cancer cell invasiveness. J Biol Chem 2018; 293:16193-16205. [PMID: 30166347 DOI: 10.1074/jbc.ra118.003699] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 08/13/2018] [Indexed: 12/23/2022] Open
Abstract
ERK3 is an atypical mitogen-activated protein kinase (MAPK) that has recently gained interest for its role in promoting cancer cell migration and invasion. However, the molecular regulation of ERK3 functions in cancer cells is largely unknown. ERK3 has a single phospho-acceptor site (Ser189) in its activation motif rather than the TXY conserved in conventional MAPKs such as ERK1/2. Although dual phosphorylation of the TXY motif is known to be critical for the activation of conventional MAPKs, the role of Ser189 phosphorylation in ERK3 activity and its function in cancer cells remain elusive. In this study, we revealed that activation loop phosphorylation is important for ERK3 in promoting cancer cell invasiveness, as the S189A mutation greatly decreased the ability of ERK3 to promote migration and invasion of lung cancer cells. Interestingly, a catalytically inactive ERK3 mutant was still capable of increasing migration and invasion, although to a lesser extent compared with WT ERK3, suggesting that ERK3 promotes cancer cell invasiveness by both kinase-dependent and kinase-independent mechanisms. To elucidate how the S189A mutation reduces the invasiveness-promoting ability of ERK3, we tested its effect on the kinase activity of ERK3 toward steroid receptor coactivator 3 (SRC3), a recently identified substrate of ERK3 critical for cancer cell invasiveness. Compared with ERK3, ERK3-S189A exhibited a dramatic decrease in kinase activity toward SRC3 and a concomitantly reduced ability to stimulate matrix metalloproteinase expression. Taken together, our study unravels the importance of Ser189 phosphorylation for intramolecular regulation of ERK3 kinase activity and invasiveness-promoting ability in lung cancer cells.
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Affiliation(s)
- Lobna Elkhadragy
- From the Department of Biochemistry and Molecular Biology, Boonshoft School of Medicine, Wright State University, Dayton, Ohio 45435
| | - Hadel Alsaran
- From the Department of Biochemistry and Molecular Biology, Boonshoft School of Medicine, Wright State University, Dayton, Ohio 45435
| | - Marion Morel
- From the Department of Biochemistry and Molecular Biology, Boonshoft School of Medicine, Wright State University, Dayton, Ohio 45435
| | - Weiwen Long
- From the Department of Biochemistry and Molecular Biology, Boonshoft School of Medicine, Wright State University, Dayton, Ohio 45435
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Takahashi C, Miyatake K, Kusakabe M, Nishida E. The atypical mitogen-activated protein kinase ERK3 is essential for establishment of epithelial architecture. J Biol Chem 2018; 293:8342-8361. [PMID: 29674317 PMCID: PMC5986203 DOI: 10.1074/jbc.ra117.000992] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 04/19/2018] [Indexed: 12/14/2022] Open
Abstract
Epithelia contribute to physical barriers that protect internal tissues from the external environment and also support organ structure. Accordingly, establishment and maintenance of epithelial architecture are essential for both embryonic development and adult physiology. Here, using gene knockout and knockdown techniques along with gene profiling, we show that extracellular signal-regulated kinase 3 (ERK3), a poorly characterized atypical mitogen-activated protein kinase (MAPK), regulates the epithelial architecture in vertebrates. We found that in Xenopus embryonic epidermal epithelia, ERK3 knockdown impairs adherens and tight-junction protein distribution, as well as tight-junction barrier function, resulting in epidermal breakdown. Moreover, in human epithelial breast cancer cells, inhibition of ERK3 expression induced thickened epithelia with aberrant adherens and tight junctions. Results from microarray analyses suggested that transcription factor AP-2α (TFAP2A), a transcriptional regulator important for epithelial gene expression, is involved in ERK3-dependent changes in gene expression. Of note, TFAP2A knockdown phenocopied ERK3 knockdown in both Xenopus embryos and human cells, and ERK3 was required for full activation of TFAP2A-dependent transcription. Our findings reveal that ERK3 regulates epithelial architecture, possibly together with TFAP2A.
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Affiliation(s)
- Chika Takahashi
- From the Department of Cell and Developmental Biology, Graduate School of Biostudies, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan and
| | - Koichi Miyatake
- From the Department of Cell and Developmental Biology, Graduate School of Biostudies, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan and
| | - Morioh Kusakabe
- From the Department of Cell and Developmental Biology, Graduate School of Biostudies, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan and
| | - Eisuke Nishida
- From the Department of Cell and Developmental Biology, Graduate School of Biostudies, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan and
- AMED-CREST, Japan Agency for Medical Research and Development, 1-7-1 Otemachi, Chiyoda-ku, Tokyo 100-0004, Japan
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Alsaran H, Elkhadragy L, Shakya A, Long W. L290P/V mutations increase ERK3's cytoplasmic localization and migration/invasion-promoting capability in cancer cells. Sci Rep 2017; 7:14979. [PMID: 29101390 PMCID: PMC5670241 DOI: 10.1038/s41598-017-15135-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 10/20/2017] [Indexed: 12/24/2022] Open
Abstract
Protein kinases are frequently mutated in human cancers, which leads to altered signaling pathways and contributes to tumor growth and progression. ERK3 is an atypical mitogen-activated protein kinase (MAPK) containing an S-E-G activation motif rather than the conserved T-X-Y motif in conventional MAPKs such as ERK1/2. Recent studies have revealed important roles for ERK3 in cancers. ERK3 promotes cancer cell migration/invasion and tumor metastasis, and its expression is upregulated in multiple cancers. Little is known, however, regarding ERK3 mutations in cancers. In the present study, we functionally and mechanistically characterized ERK3 L290P/V mutations, which are located within ERK3’s kinase domain, and are shown to exist in several cancers including lung cancer and colon cancer. We found that in comparison with wild type ERK3, both L290P and L290V mutants have greatly increased activity in promoting cancer cell migration and invasion, but have little impact on ERK3’s role in cell proliferation. Mechanistically, while they have no clear effect on kinase activity, L290P/V mutations enhance ERK3’s cytoplasmic localization by increasing the interaction with the nuclear export factor CRM1. Our findings suggest that L290P/V mutations of ERK3 may confer increased invasiveness to cancers.
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Affiliation(s)
- Hadel Alsaran
- Department of Biochemistry and Molecular Biology, Boonshoft School of Medicine, Wright State University, Dayton, Ohio, USA
| | - Lobna Elkhadragy
- Department of Biochemistry and Molecular Biology, Boonshoft School of Medicine, Wright State University, Dayton, Ohio, USA
| | - Astha Shakya
- Department of Biochemistry and Molecular Biology, Boonshoft School of Medicine, Wright State University, Dayton, Ohio, USA
| | - Weiwen Long
- Department of Biochemistry and Molecular Biology, Boonshoft School of Medicine, Wright State University, Dayton, Ohio, USA.
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Elkhadragy L, Chen M, Miller K, Yang MH, Long W. A regulatory BMI1/let-7i/ERK3 pathway controls the motility of head and neck cancer cells. Mol Oncol 2017; 11:194-207. [PMID: 28079973 PMCID: PMC5288292 DOI: 10.1002/1878-0261.12021] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 10/16/2016] [Accepted: 10/31/2016] [Indexed: 12/16/2022] Open
Abstract
Extracellular signal‐regulated kinase 3 (ERK3) is an atypical mitogen‐activated protein kinase (MAPK), whose biological activity is tightly regulated by its cellular abundance. Recent studies have revealed that ERK3 is upregulated in multiple cancers and promotes cancer cell migration/invasion and drug resistance. Little is known, however, about how ERK3 expression level is upregulated in cancers. Here, we have identified the oncogenic polycomb group protein BMI1 as a positive regulator of ERK3 level in head and neck cancer cells. Mechanistically, BMI1 upregulates ERK3 expression by suppressing the tumor suppressive microRNA (miRNA) let‐7i, which directly targets ERK3 mRNA. ERK3 then acts as an important downstream mediator of BMI1 in promoting cancer cell migration. Importantly, ERK3 protein level is positively correlated with BMI1 level in head and neck tumor specimens of human patients. Taken together, our study revealed a molecular pathway consisting of BMI1, miRNA let‐7i, and ERK3, which controls the migration of head and neck cancer cells, and suggests that ERK3 kinase is a potential new therapeutic target in head and neck cancers, particularly those with BMI1 overexpression.
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Affiliation(s)
- Lobna Elkhadragy
- Department of Biochemistry and Molecular Biology, Boonshoft School of Medicine, Wright State University, Dayton, OH, USA
| | - Minyi Chen
- Department of Biochemistry and Molecular Biology, Boonshoft School of Medicine, Wright State University, Dayton, OH, USA
| | - Kennon Miller
- Department of Pathology, Boonshoft School of Medicine, Wright State University, Dayton, OH, USA
| | - Muh-Hwa Yang
- Institute of Clinic Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Weiwen Long
- Department of Biochemistry and Molecular Biology, Boonshoft School of Medicine, Wright State University, Dayton, OH, USA
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Kostenko S, Dumitriu G, Moens U. Tumour promoting and suppressing roles of the atypical MAP kinase signalling pathway ERK3/4-MK5. J Mol Signal 2012; 7:9. [PMID: 22800433 PMCID: PMC3419095 DOI: 10.1186/1750-2187-7-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2012] [Accepted: 06/20/2012] [Indexed: 12/28/2022] Open
Abstract
Perturbed action of signal transduction pathways, including the mitogen-activated protein (MAP) kinase pathways, is one of the hallmarks of many cancers. While the implication of the typical MAP kinase pathways ERK1/2-MEK1/2, p38MAPK and JNK is well established, recent findings illustrate that the atypical MAP kinase ERK3/4-MK5 may also be involved in tumorigenic processes. Remarkably, the ERK3/4-MK5 pathway seems to possess anti-oncogenic as well as pro-oncogenic properties in cell culture and aninal models. This review summarizes the mutations in the genes encoding ERK3, ERK4 and MK5 that have been detected in different cancers, reports aberrant expression levels of these proteins in human tumours, and discusses the mechanisms by which this pathway can induce senescence, stimulate angiogenesis and invasiveness.
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Affiliation(s)
- Sergiy Kostenko
- Department of Medical Biology, Faculty of Health Sciences, University of Tromsø, Tromsø, NO-9037, Norway
| | - Gianina Dumitriu
- Department of Medical Biology, Faculty of Health Sciences, University of Tromsø, Tromsø, NO-9037, Norway
| | - Ugo Moens
- Department of Medical Biology, Faculty of Health Sciences, University of Tromsø, Tromsø, NO-9037, Norway
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Liu YC, Ho HC, Lee MR, Lai KC, Yeh CM, Lin YM, Ho TY, Hsiang CY, Chung JG. Early induction of cytokines/cytokine receptors and Cox2, and activation of NF-κB in 4-nitroquinoline 1-oxide-induced murine oral cancer model. Toxicol Appl Pharmacol 2012; 262:107-16. [PMID: 22561872 DOI: 10.1016/j.taap.2012.04.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Revised: 03/15/2012] [Accepted: 04/17/2012] [Indexed: 12/15/2022]
Abstract
The purpose of this study was to identify the genes induced early in murine oral carcinogenesis. Murine tongue tumors induced by the carcinogen, 4-nitroquinoline 1-oxide (4-NQO), and paired non-tumor tissues were subjected to microarray analysis. Hierarchical clustering of upregulated genes in the tumor tissues revealed an association of induced genes with inflammation. Cytokines/cytokine receptors induced early were subsequently identified, clearly indicating their involvement in oral carcinogenesis. Hierarchical clustering also showed that cytokine-mediated inflammation was possibly linked with Mapk6. Cox2 exhibited the greatest extent (9-18 fold) of induction in the microarray data, and its early induction was observed in a 2h painting experiment by RT-PCR. MetaCore analysis showed that overexpressed Cox2 may interact with p53 and transcriptionally inhibit expression of several downstream genes. A painting experiment in transgenic mice also demonstrated that NF-κB activates early independently of Cox2 induction. MetaCore analysis revealed the most striking metabolic alterations in tumor tissues, especially in lipid metabolism resulting from the reduction of Pparα and Rxrg. Reduced expression of Mapk12 was noted, and MetaCore analysis established its relationship with decreased efficiency of Pparα phosphorylation. In conclusion, in addition to cytokines/cytokine receptors, the early induction of Cox2 and NF-κB activation is involved in murine oral carcinogenesis.
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Affiliation(s)
- Yu-Ching Liu
- Department of Medical Research, China Medical University Hospital, Taichung 404, Taiwan
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S-Allylcysteine modulates the expression of E-cadherin and inhibits the malignant progression of human oral cancer. J Nutr Biochem 2009; 20:1013-20. [DOI: 10.1016/j.jnutbio.2008.09.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2008] [Revised: 09/24/2008] [Accepted: 09/30/2008] [Indexed: 01/11/2023]
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11
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Mallick S, Patil R, Gyanchandani R, Pawar S, Palve V, Kannan S, Pathak KA, Choudhary M, Teni TR. Human oral cancers have altered expression of Bcl-2 family members and increased expression of the anti-apoptotic splice variant ofMcl-1. J Pathol 2009; 217:398-407. [DOI: 10.1002/path.2459] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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12
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Merkerova M, Bruchova H, Brdicka R. Expression analysis of PCNA gene in chronic myelogenous leukemia--combined application of siRNA silencing and expression arrays. Leuk Res 2006; 31:661-72. [PMID: 17070905 DOI: 10.1016/j.leukres.2006.10.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2006] [Revised: 09/30/2006] [Accepted: 10/02/2006] [Indexed: 10/24/2022]
Abstract
Imatinib metylase is the first choice treatment for BCR/ABL positive chronic myelogenous leukemia (CML). However, as some CML patients develop resistance to imatinib therapy, there is a significant interest in development of alternative treatment strategies, such as identifying targets other than BCR/ABL that may participate in CML. Previously, we demonstrated strong PCNA up-regulation in CML patients. To further study its role in CML pathogenesis, we performed silencing of PCNA expression followed by array experiments. PCNA inhibition led to down-regulation of CDK1, CDK4, PLK1, ERK3, JNK1, STAT5, and several inhibitors of apoptosis (DAXX, Mdm2, survivin). The following genes were up-regulated: CDK inhibitors p21 and p19-INK4D, pro-apoptotic FAST kinase, fibronectin, etc. However, as PCNA affects cell growth in naturally proliferating cells as well as in cancerous cells, it seems to act a secondary role relating to proliferation activity of leukemic cells.
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MESH Headings
- Apoptosis
- Benzamides
- Biomarkers, Tumor/genetics
- Cell Proliferation
- Drug Resistance, Neoplasm
- Fusion Proteins, bcr-abl/metabolism
- Gene Expression Profiling
- Gene Expression Regulation, Leukemic
- Gene Silencing
- Humans
- Imatinib Mesylate
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/drug therapy
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/genetics
- Oligonucleotide Array Sequence Analysis
- Piperazines/therapeutic use
- Proliferating Cell Nuclear Antigen/genetics
- Pyrimidines/therapeutic use
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- RNA, Neoplasm/genetics
- RNA, Neoplasm/metabolism
- RNA, Small Interfering/pharmacology
- Reverse Transcriptase Polymerase Chain Reaction
- Tumor Cells, Cultured
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Affiliation(s)
- Michaela Merkerova
- Institute of Hematology and Blood Transfusion, Department of Molecular Genetics, U nemocnice 1, 12820 Prague 2, Czech Republic.
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