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Zhu L, Wang J, Hu J. High expression of IL4I1 is correlated with poor prognosis and immune infiltration in thyroid cancer. BMC Endocr Disord 2023; 23:148. [PMID: 37434155 DOI: 10.1186/s12902-023-01407-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 07/06/2023] [Indexed: 07/13/2023] Open
Abstract
BACKGROUND Thyroid cancer-related deaths mostly result from metastasis. It was reported that the immunometabolism associated enzyme interleukin-4-induced-1 (IL4I1) was related to tumor metastasis. The present study was intended to investigate the effects of IL4I1 on thyroid cancer metastasis and its relationship with the prognosis. METHODS Data from Cancer Genome Atlas (TCGA) and Gene Expression Omnibus (GEO) were analyzed to find out the different mRNA expressions of IL4I1 between thyroid cancer and normal tissues. And Human Protein Atlas (HPA) was used to assess IL4I1 protein expression. To further differentiate thyroid cancer from normal tissues and estimate the impact of IL4I1 on the prognosis, the receiver operating characteristic curve (ROC) and Kaplan-Meier (KM) method was performed. The protein-protein interaction (PPI) network was established using STRING, and functional enrichment analyses were conducted by "clusterProfiler" package. Then, we assayed the correlation between IL4I1 and some related molecules. The relationship between IL4I1 and immune infiltration was performed using "Gene Set Variation Analysis (GSVA)" package in TCGA and tumor-immune system interaction database (TISIDB). Finally, we did in vitro experiments in order to further prove the bioeffects of IL4I1 on metastasis. RESULTS The expression of IL4I1 mRNA and IL4I1 protein was significantly upregulated in thyroid cancer tissues. The increment of IL4I1 mRNA expression was related to high-grade malignancy, lymph node metastases and extrathyroidal extension. The ROC curve displayed the cutoff value of 0.782, with the sensitivity of 77.5% and the specificity of 77.8%. KM survival analysis showed that there was a worse PFS in patients with high IL4I1 expression than those with low IL4I1 expression (p = 0.013). Further study indicated that IL4I1 was associated with lactate, body fluid secretion, positive regulation of T cell differentiation, and cellular response to nutrients in Gene Ontology (GO) analysis. Moreover, IL4I1 was found correlated with immune infiltration. Finally, the in vitro experiments revealed the promotion of IL4I1 on cancer cell proliferation, migration and invasion. CONCLUSIONS The increased IL4I1 expression is markedly correlated with the immune imbalance in the tumor microenvironment (TME) and predicts poor survival in thyroid cancer. This study reveals the potential clinical biomarker of poor prognosis and the target of immune therapy in thyroid cancer.
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Affiliation(s)
- Liying Zhu
- Department of Geratology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No.197 Ruijin 2nd Road, Shanghai, 200025, China
| | - Jun Wang
- Department of Otolaryngology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jia'an Hu
- Department of Geratology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No.197 Ruijin 2nd Road, Shanghai, 200025, China.
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2
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Robinson R, Youngblood H, Iyer H, Bloom J, Lee TJ, Chang L, Lukowski Z, Zhi W, Sharma A, Sharma S. Diabetes Induced Alterations in Murine Vitreous Proteome Are Mitigated by IL-6 Trans-Signaling Inhibition. Invest Ophthalmol Vis Sci 2021; 61:2. [PMID: 32870245 PMCID: PMC7476668 DOI: 10.1167/iovs.61.11.2] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Purpose Diabetic retinopathy (DR) is a microvascular complication caused by prolonged hyperglycemia and characterized by leaky retinal vasculature and ischemia-induced angiogenesis. Vitreous humor is a gel-like biofluid in the posterior segment of the eye between the lens and the retina. Disease-related changes are observed in the biochemical constituents of the vitreous, including proteins and macromolecules. Recently, we found that IL-6 trans-signaling plays a significant role in the vascular leakage and retinal pathology associated with DR. Therefore, in this study, comprehensive proteomic profiling of the murine vitreous was performed to identify diabetes-induced alterations and to determine effects of IL-6 trans-signaling inhibition on these changes. Methods Vitreous samples from mice were collected by evisceration, and proteomic analyses were performed using liquid chromatography–tandem mass spectrometry (LC-MS/MS). Results A total of 154 proteins were identified with high confidence in control mice and were considered to be characteristic of healthy murine vitreous fluid. The levels of 72 vitreous proteins were significantly altered in diabetic mice, including several members of heat shock proteins, 14-3-3 proteins, and tubulins. Alterations in 52 out of 72 proteins in diabetic mice were mitigated by IL-6 trans-signaling inhibition. Conclusions Proteomic analysis of murine vitreous fluid performed in this study provides important information about the changes caused by diabetes in the ocular microenvironment. These diabetes-induced alterations in the murine vitreous proteome were mitigated by IL-6 trans-signaling inhibition. These findings further support that IL-6 trans-signaling may be an important therapeutic target for the treatment of DR.
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Affiliation(s)
- Rebekah Robinson
- Center for Biotechnology and Genomic Medicine, Augusta University, Augusta, Georgia, United States
| | - Hannah Youngblood
- Department of Cellular Biology and Anatomy, Augusta University, Augusta, Georgia, United States
| | - Hersha Iyer
- Center for Biotechnology and Genomic Medicine, Augusta University, Augusta, Georgia, United States
| | - Justin Bloom
- Center for Biotechnology and Genomic Medicine, Augusta University, Augusta, Georgia, United States
| | - Tae Jin Lee
- Center for Biotechnology and Genomic Medicine, Augusta University, Augusta, Georgia, United States
| | - Luke Chang
- Department of Ophthalmology, Augusta University, Augusta, Georgia, United States
| | - Zachary Lukowski
- Department of Ophthalmology, Augusta University, Augusta, Georgia, United States
| | - Wenbo Zhi
- Center for Biotechnology and Genomic Medicine, Augusta University, Augusta, Georgia, United States
| | - Ashok Sharma
- Center for Biotechnology and Genomic Medicine, Augusta University, Augusta, Georgia, United States.,Department of Ophthalmology, Augusta University, Augusta, Georgia, United States.,Department of Population Health Sciences, Augusta University, Augusta, Georgia, United States.,Culver Vision Discovery Institute, Augusta University, Augusta, Georgia, United States
| | - Shruti Sharma
- Center for Biotechnology and Genomic Medicine, Augusta University, Augusta, Georgia, United States.,Department of Ophthalmology, Augusta University, Augusta, Georgia, United States.,Culver Vision Discovery Institute, Augusta University, Augusta, Georgia, United States
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An Overview of l-Amino Acid Oxidase Functions from Bacteria to Mammals: Focus on the Immunoregulatory Phenylalanine Oxidase IL4I1. Molecules 2017; 22:molecules22122151. [PMID: 29206151 PMCID: PMC6149928 DOI: 10.3390/molecules22122151] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 11/23/2017] [Accepted: 11/29/2017] [Indexed: 01/04/2023] Open
Abstract
l-amino acid oxidases are flavin adenine dinucleotide-dependent enzymes present in all major kingdom of life, from bacteria to mammals. They participate in defense mechanisms by limiting the growth of most bacteria and parasites. A few mammalian LAAOs have been described, of which the enzyme “interleukin-4 induced gene 1” (IL4I1) is the best characterized. IL4I1 mainly oxidizes l-phenylalanine. It is a secreted enzyme physiologically produced by antigen presenting cells of the myeloid and B cell lineages and T helper type (Th) 17 cells. Important roles of IL4I1 in the fine control of the adaptive immune response in mice and humans have emerged during the last few years. Indeed, IL4I1 inhibits T cell proliferation and cytokine production and facilitates naïve CD4+ T-cell differentiation into regulatory T cells in vitro by limiting the capacity of T lymphocytes to respond to clonal receptor stimulation. It may also play a role in controlling the germinal center reaction for antibody production and limiting Th1 and Th17 responses. IL4I1 is expressed in tumor-associated macrophages of most human cancers and in some tumor cell types. Such expression, associated with its capacity to facilitate tumor growth by inhibiting the anti-tumor T-cell response, makes IL4I1 a new potential druggable target in the field of immunomodulation in cancer.
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Annunziato F, Cosmi L, Liotta F, Maggi E, Romagnani S. Human Th1 dichotomy: origin, phenotype and biologic activities. Immunology 2014; 144:343-351. [PMID: 25284714 PMCID: PMC4557671 DOI: 10.1111/imm.12399] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Revised: 09/30/2014] [Accepted: 09/30/2014] [Indexed: 12/14/2022] Open
Abstract
The great variety of pathogens present in the environment has obliged the immune system to evolve different mechanisms for tailored and maximally protective responses. Initially, two major types of CD4+ T helper (Th) effector cells were identified, and named as type 1 (Th1) and type (Th2) cells because of the different cytokines they produce. More recently, a third type of CD4+ Th effectors has been identified and named as Th17 cells. Th17 cells, however, have been found to exhibit high plasticity because they rapidly shift into the Th1 phenotype in the inflammatory sites. Therefore, in these sites usually there is a dichotomic mixture of classic and non classic (Th17-derived) Th1 cells. In humans, non classic Th1 cells express CD161, as well as the retinoic acid orphan receptor C, IL-17 receptor E, IL-1RI, CCR6, and IL-4-induced gene 1 and Tob-1, which are all virtually absent from classic Th1 cells. The possibility to distinguish these two cell subsets may allow the opportunity to better establish their respective pathogenic role in different chronic inflammatory disorders. In this review, we discuss the different origin, the distinctive phenotypic features and the major biologic activities of classic and non classic Th1 cells. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Francesco Annunziato
- Department of Experimental and Clinical Medicine and DENOTHE Centre, University of FlorenceFlorence, Italy
- Regenerative Medicine Unit and Immunology and Cellular Therapy Unit, Azienda Ospedaliera CareggiFlorence, Italy
| | - Lorenzo Cosmi
- Department of Experimental and Clinical Medicine and DENOTHE Centre, University of FlorenceFlorence, Italy
- Regenerative Medicine Unit and Immunology and Cellular Therapy Unit, Azienda Ospedaliera CareggiFlorence, Italy
| | - Francesco Liotta
- Department of Experimental and Clinical Medicine and DENOTHE Centre, University of FlorenceFlorence, Italy
- Regenerative Medicine Unit and Immunology and Cellular Therapy Unit, Azienda Ospedaliera CareggiFlorence, Italy
| | - Enrico Maggi
- Department of Experimental and Clinical Medicine and DENOTHE Centre, University of FlorenceFlorence, Italy
- Regenerative Medicine Unit and Immunology and Cellular Therapy Unit, Azienda Ospedaliera CareggiFlorence, Italy
| | - Sergio Romagnani
- Department of Experimental and Clinical Medicine and DENOTHE Centre, University of FlorenceFlorence, Italy
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Annunziato F, Santarlasci V, Maggi L, Cosmi L, Liotta F, Romagnani S. Reasons for rarity of Th17 cells in inflammatory sites of human disorders. Semin Immunol 2013; 25:299-304. [PMID: 24211040 DOI: 10.1016/j.smim.2013.10.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
T helper 17 (Th17) cells have been reported to be responsible for several chronic inflammatory diseases. However, a peculiar feature of human Th17 cells is that they are very rare in the inflammatory sites in comparison with Th1 cells. The first reason for this rarity is the existence of some self-regulatory mechanisms that limit their expansion. The limited expansion of human Th17 cells is related to the retinoic acid orphan (ROR)C-dependent up-regulation of the interleukin (IL)-4 induced gene 1 (IL4I1), which encodes for a l-phenylalanine oxidase, that has been shown to down-regulate CD3ζ expression in T cells. This results in abnormalities of the molecular pathway which is responsible for the impairment of IL-2 production and therefore for the lack of cell proliferation in response to T-cell receptor (TCR) signalling. IL4I1 up-regulation also associates with the increased expression of Tob1, a member of the Tob/BTG anti-proliferative protein family, which is involved in cell cycle arrest. A second reason for the rarity of human Th17 cells in the inflammatory sites is their rapid shifting into the Th1 phenotype, which is mainly related to the activity of IL-12 and TNF-α. We have named these Th17-derived Th1 cells as non-classic because they differ from classic Th1 cells for the expression of molecules specific for Th17 cells, such as RORC, CD161, CCR6, IL4I1, and IL-17 receptor E. This distinction may be important for defining the respective pathogenic role of Th17, non-classic Th1 and classic Th1 cells in many human inflammatory disorders.
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Affiliation(s)
- Francesco Annunziato
- Department of Experimental and Clinical Medicine and DENOTHE Center, University of Florence, Florence 50134, Italy; Regenerative Medicine Unit and Immunology and Cellular Therapy Unit of Azienda Ospedaliera Careggi, Florence 50134, Italy.
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6
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Annunziato F, Cosmi L, Liotta F, Maggi E, Romagnani S. Main features of human T helper 17 cells. Ann N Y Acad Sci 2013; 1284:66-70. [DOI: 10.1111/nyas.12075] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Francesco Annunziato
- Laboratory of Immunology; Allergology and Cellular Therapies; Department of Internal Medicine and Denothe Center; University of Florence; Italy
| | - Lorenzo Cosmi
- Laboratory of Immunology; Allergology and Cellular Therapies; Department of Internal Medicine and Denothe Center; University of Florence; Italy
| | - Francesco Liotta
- Laboratory of Immunology; Allergology and Cellular Therapies; Department of Internal Medicine and Denothe Center; University of Florence; Italy
| | - Enrico Maggi
- Laboratory of Immunology; Allergology and Cellular Therapies; Department of Internal Medicine and Denothe Center; University of Florence; Italy
| | - Sergio Romagnani
- Laboratory of Immunology; Allergology and Cellular Therapies; Department of Internal Medicine and Denothe Center; University of Florence; Italy
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7
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Defining the human T helper 17 cell phenotype. Trends Immunol 2012; 33:505-12. [PMID: 22682163 DOI: 10.1016/j.it.2012.05.004] [Citation(s) in RCA: 128] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Revised: 05/08/2012] [Accepted: 05/10/2012] [Indexed: 01/01/2023]
Abstract
T helper (Th) 17 cells represent a third effector arm of CD4 T cells and complement the function of the Th1 and Th2 cell lineages. Here, we provide an overview of the transcription factors, cytokines, chemokines, and cytokine and chemokine receptors that characterize the Th17 cell phenotype. Data relevant for human Th17 cells are emphasized, with a focus on the function of two markers that have recently been associated with human Th17 cells, CD161 and interleukin-4-induced gene 1 (IL4I1). Also considered is the basis of Th17 cell plasticity towards the Th1 lineage, and we suggest that this plasticity together with the limited expansion of Th17 cells in response to T cell receptor (TCR) triggering accounts for the rarity of human Th17 cells in inflamed tissues.
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8
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Beach JA, Nary LJ, Hirakawa Y, Holland E, Hovanessian R, Medh RD. E4BP4 facilitates glucocorticoid-evoked apoptosis of human leukemic CEM cells via upregulation of Bim. J Mol Signal 2011; 6:13. [PMID: 21975218 PMCID: PMC3197565 DOI: 10.1186/1750-2187-6-13] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2011] [Accepted: 10/05/2011] [Indexed: 12/02/2022] Open
Abstract
Background Synthetic GCs serve as therapeutic agents for some lymphoid leukemias because of their ability to induce transcriptional changes via the GC receptor (GR) and trigger apoptosis. Upregulation of the BH3-only member of Bcl-2 family proteins, Bim, has been shown to be essential for GC-evoked apoptosis of leukemic lymphoblasts. Using human T cell leukemic sister clones CEM-C7-14 and CEM-C1-15, we have previously shown that the bZIP transcriptional repressor, E4BP4, is preferentially upregulated by GCs in CEM-C7-14 cells that are susceptible to GC-evoked apoptosis, but not in refractory CEM-C1-15 cells. E4BP4 is an evolutionarily conserved member of the PAR family of bZIP transcription factors related to the C. elegans death specification gene ces2. Results Mouse E4BP4 was ectopically expressed in CEM-C1-15 cells, resulting in sensitization to GC-evoked apoptosis in correlation with restoration of E4BP4 and Bim upregulation. shRNA mediated modest knockdown of E4BP4 in CEM-C7-14 cells resulted in concomitant reduction in Bim expression, although GC-evoked fold-induction and sensitivity to apoptosis was similar to parental cells. Conclusion Data presented here suggest that GC-mediated upregulation of E4BP4 facilitates Bim upregulation and apoptosis of CEM cells. Since the Bim promoter does not contain any consensus GRE or EBPRE sequences, induction of Bim may be a secondary response.
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Affiliation(s)
- Jessica A Beach
- Department of Biology, California State University Northridge, Northridge, CA 91330-8303, USA.
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9
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Kashiwada M, Cassel SL, Colgan JD, Rothman PB. NFIL3/E4BP4 controls type 2 T helper cell cytokine expression. EMBO J 2011; 30:2071-82. [PMID: 21499227 DOI: 10.1038/emboj.2011.111] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2010] [Accepted: 03/17/2011] [Indexed: 12/21/2022] Open
Abstract
Type 2 T helper (T(H)2) cells are critical for the development of allergic immune responses; however, the molecular mechanism controlling their effector function is still largely unclear. Here, we report that the transcription factor NFIL3/E4BP4 regulates cytokine production and effector function by T(H)2 cells. NFIL3 is highly expressed in T(H)2 cells but much less in T(H)1 cells. Production of interleukin (IL)-13 and IL-5 is significantly increased in Nfil3(-/-) T(H)2 cells and is decreased by expression of NFIL3 in wild-type T(H)2 cells. NFIL3 directly binds to and negatively regulates the Il13 gene. In contrast, IL-4 production is decreased in Nfil3(-/-) T(H)2 cells. Increased IL-13 and IL-5 together with decreased IL-4 production by antigen-stimulated splenocytes from the immunized Nfil3(-/-) mice was also observed. The ability of NFIL3 to alter T(H)2 cytokine production is a T-cell intrinsic effect. Taken together, these data indicate that NFIL3 is a key regulator of T(H)2 responses.
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Affiliation(s)
- Masaki Kashiwada
- Department of Internal Medicine, University of Iowa, Iowa City, IA, USA
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10
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IL-4-induced transcription factor NFIL3/E4BP4 controls IgE class switching. Proc Natl Acad Sci U S A 2009; 107:821-6. [PMID: 20080759 DOI: 10.1073/pnas.0909235107] [Citation(s) in RCA: 128] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
IL-4 signaling promotes IgE class switching through STAT6 activation and the induction of Ig germ-line epsilon (GLepsilon) transcription. Previously, we and others identified a transcription factor, Nfil3, as a gene induced by IL-4 stimulation in B cells. However, the precise roles of nuclear factor, IL-3-regulated (NFIL3) in IL-4 signaling are unknown. Here, we report that NFIL3 is important for IgE class switching. NFIL3-deficient mice show impaired IgE class switching, and this defect is B-cell intrinsic. The induction of GLepsilon transcripts after LPS and IL-4 stimulation is significantly reduced in NFIL3-deficient B cells. Expression of NFIL3 in NFIL3-deficient B cells restores the impairment of IgE production, and overexpression of NFIL3 in the presence of cycloheximide induces GLepsilon transcripts. Moreover, NFIL3 binds to Iepsilon promoter in vivo. Together, these results identify NFIL3 as a key regulator of IL-4-induced GLepsilon transcription in response to IL-4 and subsequent IgE class switching.
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Hwang IK, Yoo KY, Kim DW, Kim SY, Park JH, Ryoo ZY, Kim J, Choi SY, Won MH. Ischemia-induced ribosomal protein S3 expressional changes and the neuroprotective effect against experimental cerebral ischemic damage. J Neurosci Res 2008; 86:1823-35. [DOI: 10.1002/jnr.21621] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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12
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Lee JA, Sinkovits RS, Mock D, Rab EL, Cai J, Yang P, Saunders B, Hsueh RC, Choi S, Subramaniam S, Scheuermann RH. Components of the antigen processing and presentation pathway revealed by gene expression microarray analysis following B cell antigen receptor (BCR) stimulation. BMC Bioinformatics 2006; 7:237. [PMID: 16670020 PMCID: PMC1479375 DOI: 10.1186/1471-2105-7-237] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2005] [Accepted: 05/02/2006] [Indexed: 12/28/2022] Open
Abstract
Background Activation of naïve B lymphocytes by extracellular ligands, e.g. antigen, lipopolysaccharide (LPS) and CD40 ligand, induces a combination of common and ligand-specific phenotypic changes through complex signal transduction pathways. For example, although all three of these ligands induce proliferation, only stimulation through the B cell antigen receptor (BCR) induces apoptosis in resting splenic B cells. In order to define the common and unique biological responses to ligand stimulation, we compared the gene expression changes induced in normal primary B cells by a panel of ligands using cDNA microarrays and a statistical approach, CLASSIFI (Cluster Assignment for Biological Inference), which identifies significant co-clustering of genes with similar Gene Ontology™ annotation. Results CLASSIFI analysis revealed an overrepresentation of genes involved in ion and vesicle transport, including multiple components of the proton pump, in the BCR-specific gene cluster, suggesting that activation of antigen processing and presentation pathways is a major biological response to antigen receptor stimulation. Proton pump components that were not included in the initial microarray data set were also upregulated in response to BCR stimulation in follow up experiments. MHC Class II expression was found to be maintained specifically in response to BCR stimulation. Furthermore, ligand-specific internalization of the BCR, a first step in B cell antigen processing and presentation, was demonstrated. Conclusion These observations provide experimental validation of the computational approach implemented in CLASSIFI, demonstrating that CLASSIFI-based gene expression cluster analysis is an effective data mining tool to identify biological processes that correlate with the experimental conditional variables. Furthermore, this analysis has identified at least thirty-eight candidate components of the B cell antigen processing and presentation pathway and sets the stage for future studies focused on a better understanding of the components involved in and unique to B cell antigen processing and presentation.
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Affiliation(s)
- Jamie A Lee
- Department of Pathology, Laboratory of Molecular Pathology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Robert S Sinkovits
- San Diego Supercomputer Center, University of California, San Diego, California 92122, USA
| | - Dennis Mock
- San Diego Supercomputer Center, University of California, San Diego, California 92122, USA
| | - Eva L Rab
- Department of Pathology, Laboratory of Molecular Pathology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Jennifer Cai
- Department of Pathology, Laboratory of Molecular Pathology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Peng Yang
- Department of Pathology, Laboratory of Molecular Pathology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Brian Saunders
- San Diego Supercomputer Center, University of California, San Diego, California 92122, USA
| | - Robert C Hsueh
- Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Sangdun Choi
- Division of Biology, California Institute of Technology, Pasadena, CA, USA
| | - Shankar Subramaniam
- San Diego Supercomputer Center, University of California, San Diego, California 92122, USA
- Department of Bioengineering, University of California, San Diego, California 92122, USA
| | - Richard H Scheuermann
- Department of Pathology, Laboratory of Molecular Pathology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
- San Diego Supercomputer Center, University of California, San Diego, California 92122, USA
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Wiemann S, Kolb-Kokocinski A, Poustka A. Alternative pre-mRNA processing regulates cell-type specific expression of the IL4l1 and NUP62 genes. BMC Biol 2005; 3:16. [PMID: 16029492 PMCID: PMC1198218 DOI: 10.1186/1741-7007-3-16] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2005] [Accepted: 07/19/2005] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Given the complexity of higher organisms, the number of genes encoded by their genomes is surprisingly small. Tissue specific regulation of expression and splicing are major factors enhancing the number of the encoded products. Commonly these mechanisms are intragenic and affect only one gene. RESULTS Here we provide evidence that the IL4I1 gene is specifically transcribed from the apparent promoter of the upstream NUP62 gene, and that the first two exons of NUP62 are also contained in the novel IL4I1_2 variant. While expression of IL4I1 driven from its previously described promoter is found mostly in B cells, the expression driven by the NUP62 promoter is restricted to cells in testis (Sertoli cells) and in the brain (e.g., Purkinje cells). Since NUP62 is itself ubiquitously expressed, the IL4I1_2 variant likely derives from cell type specific alternative pre-mRNA processing. CONCLUSION Comparative genomics suggest that the promoter upstream of the NUP62 gene originally belonged to the IL4I1 gene and was later acquired by NUP62 via insertion of a retroposon. Since both genes are apparently essential, the promoter had to serve two genes afterwards. Expression of the IL4I1 gene from the "NUP62" promoter and the tissue specific involvement of the pre-mRNA processing machinery to regulate expression of two unrelated proteins indicate a novel mechanism of gene regulation.
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Affiliation(s)
- Stefan Wiemann
- Molecular Genome Analysis, German Cancer Research Center, Im Neuenheimer Feld 580, Heidelberg, 69120, Germany
| | - Anja Kolb-Kokocinski
- Molecular Genome Analysis, German Cancer Research Center, Im Neuenheimer Feld 580, Heidelberg, 69120, Germany
| | - Annemarie Poustka
- Molecular Genome Analysis, German Cancer Research Center, Im Neuenheimer Feld 580, Heidelberg, 69120, Germany
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McDonald C, Vanscoy S, Hearing P, Reich NC. Induction of genes involved in cell cycle progression by interleukin-4. J Interferon Cytokine Res 2005; 24:729-38. [PMID: 15684740 DOI: 10.1089/jir.2004.24.729] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Interleukin-4 (IL-4) can elicit diverse cellular responses, including differentiation, fusion, and proliferation, and these are all critical to establishment of an effective immune response. In this report, we provide evidence that IL-4 induces the proliferation of T lymphocytes with the coordinate transcriptional induction of the cell cycle regulatory genes encoding Cdc25A and the minichromosome maintenance (MCM) family. This specific gene induction appears to be due to activation of the signal transducer and activator of transcription, Stat6, and in part to phosphatidylinositol 3-kinase (PI3K). The function of another family of transcription factors, E2F, is known to induce cell cycle-regulated gene expression by binding to specific DNA target sites. We demonstrate that IL-4-activated Stat6 dimers can bind to a subset of E2F target sites and stimulate gene expression by binding to these DNA elements. Our results support a role for the Stat6 signal pathway in regulating a subset of E2F-responsive genes. In addition, activation of PI3K may play a complementary role in the induction of cell cycle-regulated genes in response to IL-4.
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Affiliation(s)
- Christine McDonald
- Department of Pathology, Stony Brook University, Stony Brook, NY 11794, USA
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15
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Zhu LJ, Jiang YG. Isolation of human transcripts expressed in 16HBE cells related to chlorophyllin antitransforming activity against anti-BPDE by cDNA representational difference analysis. Chin J Cancer Res 2005. [DOI: 10.1007/s11670-005-0002-9] [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] Open
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Desai A, Victor-Vega C, Gadangi S, Montesinos MC, Chu CC, Cronstein BN. Adenosine A2A receptor stimulation increases angiogenesis by down-regulating production of the antiangiogenic matrix protein thrombospondin 1. Mol Pharmacol 2005; 67:1406-13. [PMID: 15673602 DOI: 10.1124/mol.104.007807] [Citation(s) in RCA: 92] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Topical adenosine A2A receptor agonists promote wound healing by, among other effects, increasing microvessel formation. Results of representational display analysis of human umbilical vein endothelial cells suggested that A2A receptor occupancy modulates expression of the antiangiogenic matrix protein thrombospondin 1 (TSP1). We therefore determined whether A2A receptor occupation stimulates angiogenesis by modulating TSP1 secretion. Human microvascular endothelial cells (HMVEC) were treated with medium alone, 2-p-[2-carboxyethyl] phenethyl-amino-5'-N-ethylcarboxamido-adenosine (CGS-21680), or 2-[2-(4-chlorophenyl)ethoxy]adenosine (MRE0094), selective A2A receptor agonists. TSP1 protein secretion was down-regulated after treatment with the A2A agonists CGS-21680 or MRE0094 in a dose-dependent manner (EC50 = 6.65 nM and 0.23 microM respectively). The selective A2A receptor antagonist 4-[2-[7-amino-2-(2-furyl)[1,2,4]triazolo-[2,3-a][1,3,5]triazin-5-ylamino]ethyl]phenol (ZM241385) but not the A1 and A2B receptor antagonists diphenylcyclopentylxanthine, enprofylline, and N-(4-acetylphenyl)-2-[4-(2,3,6,7-tetrahydro-2,6-dioxo-1,3-dipropyl-1H-purin-8-yl)phenoxy]acetamide (MRS1706) completely abrogated the A2A receptor agonist-mediated effect on TSP1. Vascular tube formation by HMVEC was increased by adenosine A2A receptor agonists in a dose-dependent fashion (EC50 = 0.1 microM for both), and this effect was reversed by the A2A antagonist. Moreover, in the presence of antibodies to TSP1 and CD36, the receptor for TSP1, the adenosine A2A receptor agonists stimulated no increase in vascular tube formation. These results indicate that the angiogenic effects of adenosine A2A receptor activation are, at least in part, caused by the suppression of TSP1 secretion.
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Affiliation(s)
- Avani Desai
- Department of Medicine, New York University School of Medicine, New York, New York 10016, USA
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17
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Mason JM, Naidu MD, Barcia M, Porti D, Chavan SS, Chu CC. IL-4-Induced Gene-1 Is a Leukocyte l-Amino Acid Oxidase with an Unusual Acidic pH Preference and Lysosomal Localization. THE JOURNAL OF IMMUNOLOGY 2004; 173:4561-7. [PMID: 15383589 DOI: 10.4049/jimmunol.173.7.4561] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
IL-4-induced gene-1 (Il4i1 or Fig1) initially isolated as a gene of unknown function from mouse B lymphocytes, is limited in expression to primarily immune tissues and genetically maps to a region of susceptibility to autoimmune disease. The predicted Il4i1 protein (IL4I1) sequence is most similar to apoptosis-inducing protein and Apoxin I, both l-amino acid oxidases (LAAO; Enzyme Commission 1.4.3.2). We demonstrate that IL4I1 has unique LAAO properties. IL4I1 has preference for aromatic amino acid substrates, having highest specific activity with phenylalanine. In support of this selectivity, IL4I1 is inhibited by aromatic competitors (benzoic acid and para-aminobenzoic acid), but not by nonaromatic LAAO inhibitors. Il4i1 protein and enzyme activity is found in the insoluble fraction of transient transfections, implying an association with cell membrane and possibly intracellular organelles. Indeed, IL4I1 has the unique property of being most active at acidic pH (pH 4), suggesting it may reside preferentially in lysosomes. IL4I1 is N-linked glycosylated, a requirement for lysosomal localization. Confocal microscopy of cells expressing IL4I1 translationally fused to red fluorescent protein demonstrated that IL4I1 colocalized with GFP targeted to lysosomes and with acriflavine, a green fluorescent dye that is taken up into lysosomes. Thus, IL4I1 is a unique mammalian LAAO targeted to lysosomes, an important subcellular compartment involved in Ag processing.
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Affiliation(s)
- James M Mason
- Gene Therapy Vector Laboratory, North Shore-Long Island Jewish Research Institute, Department of Medicine, North Shore University Hospital and New York University School of Medicine, Manhasset, NY 11030, USA
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18
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Lu B, Zagouras P, Fischer JE, Lu J, Li B, Flavell RA. Kinetic analysis of genomewide gene expression reveals molecule circuitries that control T cell activation and Th1/2 differentiation. Proc Natl Acad Sci U S A 2004; 101:3023-8. [PMID: 14978277 PMCID: PMC365738 DOI: 10.1073/pnas.0307743100] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
The global gene expression profiling of early T helper (Th) 1 and Th2 differentiation reveals that this process can be divided into two stages, activation and differentiation. The activation stage is manifested in coordinated mobilization of the replication machinery, a process that we hypothesize may be responsible for establishing genomewide opening of transcription loci. The molecular programs underlying the differentiation stage consist of highly regulated expression of functional groups of genes that are important for the biological properties of Th1/2 cells and transcription factors that are likely important in establishing terminal differentiation of these cells. The kinetics of expression pattern of a number of transcription factors shed new light on the molecular events that shape the outcome of Th1/2 differentiation.
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Affiliation(s)
- Binfeng Lu
- Howard Hughes Medical Institute, Section of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA.
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19
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Lin SJ, Shu PY, Chang C, Ng AK, Hu CP. IL-4 suppresses the expression and the replication of hepatitis B virus in the hepatocellular carcinoma cell line Hep3B. THE JOURNAL OF IMMUNOLOGY 2004; 171:4708-16. [PMID: 14568946 DOI: 10.4049/jimmunol.171.9.4708] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
IL-4 has been known as a Th2 cytokine and can act on B cells, T cells, and monocytes. In this study we demonstrate that IL-4Rs are expressed on human hepatocellular carcinoma (HCC) cells. We found that IL-4 suppresses hepatitis B surface Ag (HBsAg) mRNA and HBsAg production in the Hep3B cell line, which contains an integrated hepatitis B virus (HBV) genome and constitutively secretes HBsAg. When Hep3B cells are further transfected with the plasmid pHBV3.6 that contains >1 U of HBV genome, IL-4 could suppress the production of all HBV RNA and secreted HBsAg and hepatitis B virus e Ag. Furthermore, an endogenous DNA polymerase activity assay shows a decrease in HBV DNA after IL-4 treatment. Using luciferase reporter assays we have demonstrated that IL-4 could suppress the activity of the surface promoter II and the core promotor (CP). To delineate how IL-4 suppressed the transcription of HBV genes, we have examined the effect of IL-4 on the expression of transcription factors that are known to bind to the core upstream regulatory sequence, which colocalizes with enhancer II of the HBV genome. Our results demonstrate that IL-4 suppresses the expression of C/EBPalpha. Furthermore, overexpression of C/EBPalpha blocked 43 and 30% of the IL-4-mediated suppression of CP activity and IL-4-induced suppression of pregenomic RNA, respectively. Finally, we have demonstrated that mutations affecting the C/EBPalpha-binding sites on core upstream regulatory sequence/enhancer II completely abolish the IL-4-mediated suppression of CP activity. Thus, down-regulation of C/EBPalpha may be involved in the anti-HBV effect of IL-4 in Hep3B cells.
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MESH Headings
- Antiviral Agents/metabolism
- Antiviral Agents/pharmacology
- Binding Sites/genetics
- Binding Sites/immunology
- CCAAT-Enhancer-Binding Protein-alpha/biosynthesis
- CCAAT-Enhancer-Binding Protein-alpha/genetics
- CCAAT-Enhancer-Binding Protein-alpha/physiology
- CCAAT-Enhancer-Binding Protein-beta/biosynthesis
- CCAAT-Enhancer-Binding Protein-beta/genetics
- Carcinoma, Hepatocellular/immunology
- Carcinoma, Hepatocellular/virology
- Cell Line, Transformed
- Cell Line, Tumor
- DNA-Binding Proteins/biosynthesis
- DNA-Binding Proteins/genetics
- DNA-Binding Proteins/physiology
- G-Box Binding Factors
- Gene Expression Regulation, Viral/immunology
- Hepatitis B Surface Antigens/biosynthesis
- Hepatitis B Surface Antigens/genetics
- Hepatitis B e Antigens/biosynthesis
- Hepatitis B e Antigens/genetics
- Hepatitis B virus/genetics
- Hepatitis B virus/immunology
- Hepatitis B virus/physiology
- Humans
- Interleukin-4/metabolism
- Interleukin-4/pharmacology
- Liver Neoplasms/immunology
- Liver Neoplasms/virology
- Promoter Regions, Genetic/immunology
- Protein Subunits/biosynthesis
- Protein Subunits/genetics
- RNA Stability/immunology
- RNA, Viral/biosynthesis
- Receptors, Interleukin-4/biosynthesis
- Receptors, Interleukin-4/genetics
- Transcription Factors/biosynthesis
- Transcription Factors/genetics
- Transcription Factors/physiology
- Transcription, Genetic/immunology
- Transfection
- Viral Proteins/biosynthesis
- Viral Proteins/genetics
- Virus Replication/genetics
- Virus Replication/immunology
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Affiliation(s)
- Sue-Jane Lin
- Institute of Microbiology and Immunology, National Yang-Ming University, Taipei, Taiwan, Republic of China
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20
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Chen Z, Lund R, Aittokallio T, Kosonen M, Nevalainen O, Lahesmaa R. Identification of novel IL-4/Stat6-regulated genes in T lymphocytes. THE JOURNAL OF IMMUNOLOGY 2004; 171:3627-35. [PMID: 14500660 DOI: 10.4049/jimmunol.171.7.3627] [Citation(s) in RCA: 78] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
IL-4, primarily produced by T cells, mast cells, and basophiles, is a cytokine which has pleiotropic effects on the immune system. IL-4 induces T cells to differentiate to Th2 cells and activated B lymphocytes to proliferate and to synthesize IgE and IgG1. IL-4 is particularly important for the development and perpetuation of asthma and allergy. Stat6 is the protein activated by signal transduction through the IL-4R, and studies with knockout mice demonstrate that Stat6 is critical for a number of IL-4-mediated functions including Th2 development and production of IgE. In the present study, novel IL-4- and Stat6-regulated genes were discovered by using Stat6(-/-) mice and Affymetrix oligonucleotide arrays. Genes regulated by IL-4 were identified by comparing the gene expression profile of the wild-type T cells induced to polarize to the Th2 direction (CD3/CD28 activation + IL-4) to gene expression profile of the cells induced to proliferate (CD3/CD28 activation alone). Stat6-regulated genes were identified by comparing the cells isolated from the wild-type and Stat6(-/-) mice; in this experiment the cells were induced to differentiate to the Th2 direction (CD3/CD28 activation + IL-4). Our study demonstrates that a number a novel genes are regulated by IL-4 through Stat6-dependent and -independent pathways. Moreover, elucidation of kinetics of gene expression at early stages of cell differentiation reveals several genes regulated rapidly during the process, suggesting their importance for the differentiation process.
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Affiliation(s)
- Zhi Chen
- Turku Centre for Biotechnology, Drug Discovery Graduate School, University of Turku, Turku, Finland.
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21
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Ozkurt IC, Tetradis S. Parathyroid hormone-induced E4BP4/NFIL3 down-regulates transcription in osteoblasts. J Biol Chem 2003; 278:26803-9. [PMID: 12743120 DOI: 10.1074/jbc.m212652200] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Parathyroid hormone (PTH), a major regulator of bone metabolism, activates the PTHR1 receptor on the osteoblast plasma membrane to initiate signaling and induce transcription of primary response genes. Subsequently, primary genes with transcriptional activity regulate expression of downstream PTH targets. We have identified the adenovirus E4 promoter-binding protein/nuclear factor regulated by IL-3 (E4bp4) as a PTH-induced primary gene in osteoblasts. E4BP4 is a basic leucine zipper (bZIP) transcription factor that represses or activates transcription in non-osteoblastic cells. We report here that PTH rapidly and transiently induced E4bp4 mRNA in osteoblastic cells and that this induction did not require protein synthesis. PTH also induced E4BP4 protein synthesis and E4BP4 binding to a consensus but not to a mutant E4BP4 response element (EBPRE). E4BP4 overexpression inhibited an EBPRE-containing promoter-reporter construct, whereas PTH treatment attenuated activity of the same construct in primary mouse osteoblasts. Finally, E4BP4 overexpression inhibited PTH-induced activity of a cyclooxygenase-2 promoter-reporter construct. Our data suggest a role for E4BP4 in attenuation of PTH target gene transcription in osteoblasts.
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Affiliation(s)
- Ibrahim C Ozkurt
- Division of Diagnostic and Surgical Sciences, UCLA School of Dentistry, Los Angeles, California 90095-1668, USA
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22
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Yu YL, Chiang YJ, Yen JJY. GATA factors are essential for transcription of the survival gene E4bp4 and the viability response of interleukin-3 in Ba/F3 hematopoietic cells. J Biol Chem 2002; 277:27144-53. [PMID: 12023274 DOI: 10.1074/jbc.m200924200] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
E4bp4, a member of the basic region/leucine zipper transcription factor superfamily, is up-regulated by the interleukin-3 (IL-3) signaling pathway and plays an important role in the anti-apoptotic response of IL-3. In this study, we demonstrated that E4bp4 is regulated by IL-3 mainly at the transcriptional level. Promoter analysis revealed that a GATA motif downstream of a major transcription initiation site is essential for E4bp4 expression in the IL-3-dependent Ba/F3 cell line. Gel shift assays demonstrated that both GATA-1 and GATA-2 proteins bind to the E4bp4 GATA site in vitro, and the chromatin immunoprecipitation assay further confirmed the in vivo binding of GATA-1 to the E4bp4 promoter. Overexpression of GATA-1 alone transactivates the E4bp4 reporter, whereas transactivation of the E4bp4 reporter by GATA-2 is dependent on the stimulation of IL-3. Last, we demonstrated that alteration of GATA-1 binding to the GATA site by stably overexpressing GATA-1 or a GATA-1 mutant containing only the DNA-binding domain not only modulates the expression of the E4bp4 gene but also influences apoptosis induced by IL-3 removal. Taken together, our results suggest that the GATA factors play an important role in transducing the survival signal of IL-3, and one of their cellular targets is E4bp4.
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Affiliation(s)
- Yung-Luen Yu
- Graduate Institute of Life Sciences, National Defense Medical Center, Academia Sinica, No. 128, Sec. 2, Yen-Jiou-Yuan Road, Taipei, 115 Taiwan
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23
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ILG1: A New Integrase-like Gene that is a Marker of Bacterial Contamination by the Laboratory Escherichia coli Strain TOP10F′. Mol Med 2002. [DOI: 10.1007/bf03402021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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24
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Schroder AJ, Pavlidis P, Arimura A, Capece D, Rothman PB. Cutting edge: STAT6 serves as a positive and negative regulator of gene expression in IL-4-stimulated B lymphocytes. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2002; 168:996-1000. [PMID: 11801631 DOI: 10.4049/jimmunol.168.3.996] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
STAT6 plays an important role in IL-4-mediated B cell activation and differentiation. To identify primary and secondary target genes of STAT6, gene expression profiles of IL-4-stimulated B cells from STAT6+/+ vs STAT6-/- mice were compared. Statistical analysis revealed that 106 distinct probe sets including 70 known genes were differentially expressed between the 2 genotypes. These genes include transcription factors, kinases, and other enzymes, cell surface receptors, and Ig H chains. Surprisingly, although 31 genes were expressed at higher levels in STAT6+/+ B cells, 39 genes were expressed at higher abundance in STAT6-/- B cells. This result implies both positive and negative regulatory functions of STAT6 in IL-4-mediated gene expression. Furthermore, IL-4 induces expression of the transcription factor Krox20, which is required for maximal IL-4-induced transcription.
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Affiliation(s)
- Andreas J Schroder
- Department of Medicine, College of Physicians and Surgeons, Columbia University, 630 West 168th Street, New York, NY 10032, USA
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25
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Nakayama Y, Iwamoto Y, Maher SE, Tanaka Y, Bothwell AL. Altered gene expression upon BCR cross-linking in Burkitt's lymphoma B cell line. Biochem Biophys Res Commun 2000; 277:124-7. [PMID: 11027651 DOI: 10.1006/bbrc.2000.3639] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Burkitt's lymphoma cell line, BL2 was stimulated by surface BCR cross-linking and altered gene expression was analyzed by RDA methodology. Consistent with previous reports, we detected up-regulated MDC, IL6R and adhesion molecule LFA1. We also detected gene expression of SIRPalpha, anti-apoptotic A-20, signal regulatory SLP76 and BCAR3, DNA binding proteins EGR2 and DEC1 in addition to some new genes.
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Affiliation(s)
- Y Nakayama
- Section of Immunobiology, Yale University School of Medicine, New Haven, Connecticut, 06520, USA.
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26
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Agoff SN, Brentnall TA, Crispin DA, Taylor SL, Raaka S, Haggitt RC, Reed MW, Afonina IA, Rabinovitch PS, Stevens AC, Feng Z, Bronner MP. The role of cyclooxygenase 2 in ulcerative colitis-associated neoplasia. THE AMERICAN JOURNAL OF PATHOLOGY 2000; 157:737-45. [PMID: 10980113 PMCID: PMC1885705 DOI: 10.1016/s0002-9440(10)64587-7] [Citation(s) in RCA: 125] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 05/23/2000] [Indexed: 02/07/2023]
Abstract
Cyclooxygenase 2 (COX-2) overexpression has been described in sporadic colonic neoplasia, but its role in ulcerative colitis (UC) neoplastic progression remains unexplored. Although the specific role of cyclooxygenase in colonic neoplasia is uncertain, its inhibition by nonsteroidal anti-inflammatory drugs decreases the risk of sporadic colonic adenocarcinoma and causes regression of adenomas in familial adenomatous polyposis. To investigate the role of COX-2 in UC-associated neoplasia, we assessed COX-2 protein and mRNA expression throughout the spectrum of UC-associated neoplastic lesions in four total colectomy specimens, using immunocytochemistry and a novel TaqMan reverse transcriptase-polymerase chain reaction assay. The findings were correlated with DNA ploidy and inflammatory activity. We found COX-2 overexpression throughout the neoplastic spectrum in UC (P: < 0.0001, R:(2)=0.53), even in diploid samples that were negative for dysplasia. Overall, neoplastic change explained 53% of the variation in COX-2 expression, whereas inflammatory activity explained only 11%. COX-2 was overexpressed in all aneuploid samples and in 38% of diploid samples (P: = 0.0074). cDNA representational difference analysis was also performed and revealed that COX-2 mRNA was an up-regulated cDNA representational difference analysis difference product. COX-2 overexpression occurs early in UC-associated neoplasia, and the increase cannot be explained by inflammatory activity alone. The data suggest that COX-2-specific inhibitors may have a chemopreventative role in UC but the possibility that they could exacerbate UC inflammatory activity needs to be tested.
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Affiliation(s)
- S N Agoff
- Department of Pathology and the Division of Gastroenterology, University of Washington, Seattle, Washington, USA
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27
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Robinson BW, Erle DJ, Jones DA, Shapiro S, Metzger WJ, Albelda SM, Parks WC, Boylan A. Recent advances in molecular biological techniques and their relevance to pulmonary research. Thorax 2000; 55:329-39. [PMID: 10722774 PMCID: PMC1745722 DOI: 10.1136/thorax.55.4.329] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- B W Robinson
- Department of Medicine, University of Western Australia, Queen Elizabeth II Medical Centre, Nedlands, Western Australia 6009
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28
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Wenderfer SE, Slack JP, McCluskey TS, Monaco JJ. Identification of 40 genes on a 1-Mb contig around the IL-4 cytokine family gene cluster on mouse chromosome 11. Genomics 2000; 63:354-73. [PMID: 10704283 DOI: 10.1006/geno.1999.6100] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Five related cytokine genes, interleukin 3 (Il3), interleukin 4 (Il4), interleukin 5 (Il5), interleukin 13 (Il13), and granulocyte-macrophage colony-stimulating factor (Csfgm or Csf2), are tightly linked on mouse chromosome 11. We now describe a 1-Mb transcript map of this cytokine cluster. Genomic clones obtained by screening mouse bacterial artificial chromosome (BAC) and P1-derived artificial chromosome (PAC) libraries were subcloned into the pSPL3 expression vector and transfected into COS7 cells for exon trapping. In total, 118 distinct, putative exons were sequenced and characterized, mapping up to 29 distinct genes to the mouse cluster, including Il4 and Csf2. Northern blot and RT-PCR analyses indicate that all of these genes are expressed. Analysis of 1 Mb of published sequence from the region of conserved synteny on human chromosome 5q31-q33 identified 45 gene candidates, including 35 expressed genes in the human IL-4 cytokine gene cluster. Probes for 20 human genes were tested for cross-hybridization to murine BAC and PAC clones, thereby mapping 11 additional genes to the mouse complex. Thus, a total of 40 genes including 6 cytokine genes have been physically mapped within 1 Mb of mouse chromosome 11. Gene order in this complex is similar, but not identical, between human and mouse. The integrated physical and transcript maps should prove valuable as a complement to genomic sequencing and expression-dependent transcript maps of this segment of the genome.
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Affiliation(s)
- S E Wenderfer
- Department of Molecular Genetics, Biochemistry, and Microbiology, University of Cincinnati, Cincinnati, Ohio 45267-0524, USA
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29
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Affiliation(s)
- L M Staudt
- Metabolism Branch, Division of Clinical Sciences, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA.
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