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Das JK, Banskota N, Candia J, Griswold ME, Orenduff M, de Cabo R, Corcoran DL, Das SK, De S, Huffman KM, Kraus VB, Kraus WE, Martin C, Racette SB, Redman LM, Schilling B, Belsky D, Ferrucci L. Calorie restriction modulates the transcription of genes related to stress response and longevity in human muscle: The CALERIE study. Aging Cell 2023; 22:e13963. [PMID: 37823711 PMCID: PMC10726900 DOI: 10.1111/acel.13963] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 07/28/2023] [Accepted: 08/01/2023] [Indexed: 10/13/2023] Open
Abstract
The lifespan extension induced by 40% caloric restriction (CR) in rodents is accompanied by postponement of disease, preservation of function, and increased stress resistance. Whether CR elicits the same physiological and molecular responses in humans remains mostly unexplored. In the CALERIE study, 12% CR for 2 years in healthy humans induced minor losses of muscle mass (leg lean mass) without changes of muscle strength, but mechanisms for muscle quality preservation remained unclear. We performed high-depth RNA-Seq (387-618 million paired reads) on human vastus lateralis muscle biopsies collected from the CALERIE participants at baseline, 12- and 24-month follow-up from the 90 CALERIE participants randomized to CR and "ad libitum" control. Using linear mixed effect model, we identified protein-coding genes and splicing variants whose expression was significantly changed in the CR group compared to controls, including genes related to proteostasis, circadian rhythm regulation, DNA repair, mitochondrial biogenesis, mRNA processing/splicing, FOXO3 metabolism, apoptosis, and inflammation. Changes in some of these biological pathways mediated part of the positive effect of CR on muscle quality. Differentially expressed splicing variants were associated with change in pathways shown to be affected by CR in model organisms. Two years of sustained CR in humans positively affected skeletal muscle quality, and impacted gene expression and splicing profiles of biological pathways affected by CR in model organisms, suggesting that attainable levels of CR in a lifestyle intervention can benefit muscle health in humans.
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Affiliation(s)
- Jayanta Kumar Das
- Longitudinal Studies Section, Translation Gerontology BranchNational Institute on Aging, National Institutes of HealthBaltimoreMarylandUSA
| | - Nirad Banskota
- Computational Biology and Genomics CoreNational Institute on Aging, National Institutes of HealthBaltimoreMarylandUSA
| | - Julián Candia
- Longitudinal Studies Section, Translation Gerontology BranchNational Institute on Aging, National Institutes of HealthBaltimoreMarylandUSA
| | | | - Melissa Orenduff
- Duke Molecular Physiology Institute and Department of MedicineDuke University School of MedicineDurhamNorth CarolinaUSA
| | - Rafael de Cabo
- Translation Gerontology Branch, National Institute on AgingNational Institutes of HealthBaltimoreMarylandUSA
| | - David L. Corcoran
- Department of GeneticsUniversity of North Carolina at Chapel HillChapel HillNorth CarolinaUSA
| | - Sai Krupa Das
- Energy Metabolism, Jean Mayer USDA Human Nutrition Research Center on AgingTufts UniversityBostonMassachusettsUSA
| | - Supriyo De
- Computational Biology and Genomics CoreNational Institute on Aging, National Institutes of HealthBaltimoreMarylandUSA
| | - Kim Marie Huffman
- Duke Molecular Physiology Institute and Department of MedicineDuke University School of MedicineDurhamNorth CarolinaUSA
| | - Virginia B. Kraus
- Duke Molecular Physiology Institute and Department of MedicineDuke University School of MedicineDurhamNorth CarolinaUSA
| | - William E. Kraus
- Duke Molecular Physiology Institute and Department of MedicineDuke University School of MedicineDurhamNorth CarolinaUSA
| | - Corby K. Martin
- Pennington Biomedical Research CenterLouisiana State UniversityBaton RougeLouisianaUSA
| | - Susan B. Racette
- College of Health SolutionsArizona State UniversityPhoenixArizonaUSA
| | - Leanne M. Redman
- Pennington Biomedical Research CenterLouisiana State UniversityBaton RougeLouisianaUSA
| | | | - Daniel W. Belsky
- Department of Epidemiology & Butler Columbia Aging CenterColumbia University Mailman School of Public HealthNew York CityNew YorkUSA
| | - Luigi Ferrucci
- Longitudinal Studies Section, Translation Gerontology BranchNational Institute on Aging, National Institutes of HealthBaltimoreMarylandUSA
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Tian L, He M, Fan H, Zhang H, Dong X, Qiao M, Tang C, Yu Y, Chen T, Zhou N. COVID-19 of differing severity: from bulk to single-cell expression data analysis. Cell Cycle 2023; 22:1777-1797. [PMID: 37486005 PMCID: PMC10446813 DOI: 10.1080/15384101.2023.2239620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 04/03/2023] [Accepted: 06/24/2023] [Indexed: 07/25/2023] Open
Abstract
Coronavirus disease 2019 (COVID-19) is raging worldwide and causes an immense disease burden. Despite this, the biomarkers and targeting drugs of COVID-19 of differing severity remain largely unknown. Based on the GSE164805 dataset, we identified modules most critical for mild COVID-19 (mCOVID-19) and severe COVID-19 (sCOVID-19) through WGCNA, respectively. We subsequently constructed a protein-protein interaction network, and detected 16 hub genes for mCOVID-19 and 10 hub genes for sCOVID-19, followed by the prediction of upstream transcription factors (TFs) and kinases. The enrichment analysis then showed downregulation of TNFA signaling via NFKB for mCOVID-19, as well as downregulation of MYC targets V1 for sCOVID-19. Infiltration degrees of many immune cells, such as macrophages, were also sharply different between mCOVID-19 and sCOVID-19 samples. Predicted protein targeting drugs with the highest scores nearly all belong to naturally derived or synthetic glucocorticoids. For the two single-cell RNA-seq datasets, we explored the expression distribution of hub genes for mCOVID-19/sCOVID-19 in each cell type. The expression levels of PRKCA, MCM5, TYMS, RBBP4, BCL6, FLOT1, KDM6B, and TLR2 were found to be cell-type-specific. Furthermore, the expression levels of 10 hub genes for mCOVID-19 were significantly upregulated in PBMCs between eight healthy controls and eight mCOVID-19 patients at our institution. Collectively, we detected critical modules, pathways, TFs, kinases, immune cells, targeting drugs, hub genes, and their expression distributions in different cell types that may involve the pathogenesis of COVID-19 of differing severity, which may propel earlier diagnosis and more effective treatment of this intractable disease in the future.
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Affiliation(s)
- Linlin Tian
- Nanjing Municipal Center for Disease Control and Prevention, Nanjing, Jiangsu, P.R. China
| | - Min He
- Nanjing Municipal Center for Disease Control and Prevention, Nanjing, Jiangsu, P.R. China
| | - Huafeng Fan
- Nanjing Municipal Center for Disease Control and Prevention, Nanjing, Jiangsu, P.R. China
| | - Hongying Zhang
- Nanjing Municipal Center for Disease Control and Prevention, Nanjing, Jiangsu, P.R. China
| | - Xiaoxiao Dong
- Nanjing Municipal Center for Disease Control and Prevention, Nanjing, Jiangsu, P.R. China
| | - Mengkai Qiao
- Nanjing Municipal Center for Disease Control and Prevention, Nanjing, Jiangsu, P.R. China
| | - Chenyu Tang
- Nanjing Municipal Center for Disease Control and Prevention, Nanjing, Jiangsu, P.R. China
| | - Yan Yu
- Nanjing Municipal Center for Disease Control and Prevention, Nanjing, Jiangsu, P.R. China
| | - Tong Chen
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, P.R. China
| | - Nan Zhou
- Nanjing Municipal Center for Disease Control and Prevention, Nanjing, Jiangsu, P.R. China
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Tanner L, Bergwik J, Bhongir RKV, Pan L, Dong C, Wallner O, Kalderén C, Helleday T, Boldogh I, Adner M, Egesten A. Pharmacological OGG1 inhibition decreases murine allergic airway inflammation. Front Pharmacol 2022; 13:999180. [PMID: 36324676 PMCID: PMC9619105 DOI: 10.3389/fphar.2022.999180] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 10/05/2022] [Indexed: 12/01/2022] Open
Abstract
Background and aim: Allergic asthma is a complex inflammatory disease involving type 2 innate lymphoid cells, type 2 T helper cells, macrophages, and eosinophils. The disease is characterized by wheezing, dyspnea, coughing, chest tightness and variable airflow limitation for which there is no cure and is symptomatically treated with inhaled corticosteroids and β2-agonists. Molecular mechanisms underlying its complex pathogenesis are not fully understood. However, 8-oxoguanine DNA glycosylase-1 (OGG1), a DNA repair protein may play a central role, as OGG1 deficiency decreases both innate and allergic inflammation. Methods: Using a murine ovalbumin (OVA) model of allergic airway inflammation we assessed the utility of an inhibitor of OGG1 (TH5487) in this disease context. Cytokines and chemokines, promoting immune cell recruitment were measured using a 23-multiplex assay and Western blotting. Additionally, immune cell recruitment to bronchi was measured using flow cytometry. Histological analyses and immunofluorescent staining were used to confirm immune cell influx and goblet cell hyperplasia of the airways. A PCR array was used to assess asthma-related genes in murine lung tissue following TH5487 treatment. Finally, airway hyperresponsiveness was determined using in vivo lung function measurement. Results: In this study, administration of TH5487 to mice with OVA-induced allergic airway inflammation significantly decreased goblet cell hyperplasia and mucus production. TH5487 treatment also decreased levels of activated NF-κB and expression of proinflammatory cytokines and chemokines resulting in significantly lower recruitment of eosinophils and other immune cells to the lungs. Gene expression profiling of asthma and allergy-related proteins after TH5487 treatment revealed differences in several important regulators, including down regulation of Tnfrsf4, Arg1, Ccl12 and Ccl11, and upregulation of the negative regulator of type 2 inflammation, Bcl6. Furthermore, the gene Clca1 was upregulated following TH5487 treatment, which should be explored further due to its ambiguous role in allergic asthma. In addition, the OVA-induced airway hyperresponsiveness was significantly reduced by TH5487 treatment. Conclusion: Taken together, the data presented in this study suggest OGG1 as a clinically relevant pharmacological target for the treatment of allergic inflammation.
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Affiliation(s)
- Lloyd Tanner
- Department of Clinical Sciences Lund, Respiratory Medicine, Allergology, and Palliative Medicine, Lund University and Skåne University Hospital, Lund, Sweden
- *Correspondence: Lloyd Tanner,
| | - Jesper Bergwik
- Department of Clinical Sciences Lund, Respiratory Medicine, Allergology, and Palliative Medicine, Lund University and Skåne University Hospital, Lund, Sweden
| | - Ravi K. V. Bhongir
- Department of Clinical Sciences Lund, Respiratory Medicine, Allergology, and Palliative Medicine, Lund University and Skåne University Hospital, Lund, Sweden
| | - Lang Pan
- Department of Microbiology and Immunology, University of Texas Medical Branch at Galveston, Galveston, United States
| | - Caijuan Dong
- Unit of Experimental Asthma and Allergy Research, Institute of Environmental Medicine (IMM), Karolinska Institutet, Stockholm, Sweden
| | - Olov Wallner
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden
| | - Christina Kalderén
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden
- Oxcia AB, Stockholm, Sweden
| | - Thomas Helleday
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden
- Oxcia AB, Stockholm, Sweden
- Weston Park Cancer Centre, Department of Oncology and Metabolism, University of Sheffield, Sheffield, United Kingdom
| | - Istvan Boldogh
- Department of Microbiology and Immunology, University of Texas Medical Branch at Galveston, Galveston, United States
| | - Mikael Adner
- Unit of Experimental Asthma and Allergy Research, Institute of Environmental Medicine (IMM), Karolinska Institutet, Stockholm, Sweden
| | - Arne Egesten
- Department of Clinical Sciences Lund, Respiratory Medicine, Allergology, and Palliative Medicine, Lund University and Skåne University Hospital, Lund, Sweden
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4
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Kwak-Kim J, AlSubki L, Luu T, Ganieva U, Thees A, Dambaeva S, Gilman-Sachs A. The role of immunologic tests for subfertility in the clinical environment. Fertil Steril 2022; 117:1132-1143. [DOI: 10.1016/j.fertnstert.2022.04.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Revised: 03/17/2022] [Accepted: 04/06/2022] [Indexed: 11/04/2022]
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Naidu SR, Capitano M, Ropa J, Cooper S, Huang X, Broxmeyer HE. Chromatin remodeling subunit BRM and valine regulate hematopoietic stem/progenitor cell function and self-renewal via intrinsic and extrinsic effects. Leukemia 2022; 36:821-833. [PMID: 34599272 PMCID: PMC9212754 DOI: 10.1038/s41375-021-01426-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 09/07/2021] [Accepted: 09/14/2021] [Indexed: 02/08/2023]
Abstract
Little is known of hematopoietic stem (HSC) and progenitor (HPC) cell self-renewal. The role of Brahma (BRM), a chromatin remodeler, in HSC function is unknown. Bone marrow (BM) from Brm-/- mice manifested increased numbers of long- and short-term HSCs, GMPs, and increased numbers and cycling of functional HPCs. However, increased Brm-/- BM HSC numbers had decreased secondary and tertiary engraftment, suggesting BRM enhances HSC self-renewal. Valine was elevated in lineage negative Brm-/- BM cells, linking intracellular valine with Brm expression. Valine enhanced HPC colony formation, replating of human cord blood (CB) HPC-derived colonies, mouse BM and human CB HPC survival in vitro, and ex vivo expansion of normal mouse BM HSCs and HPCs. Valine increased oxygen consumption rates of WT cells. BRM through CD98 was linked to regulated import of branched chain amino acids, such as valine, in HPCs. Brm-/- LSK cells exhibited upregulated interferon response/cell cycle gene programs. Effects of BRM depletion are less apparent on isolated HSCs compared to HSCs in the presence of HPCs, suggesting cell extrinsic effects on HSCs. Thus, intracellular valine is regulated by BRM expression in HPCs, and the BRM/valine axis regulates HSC and HPC self-renewal, proliferation, and possibly differentiation fate decisions.
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Affiliation(s)
- Samisubbu R. Naidu
- Medicine, Indiana University School of Medicine,Indiana University School of Medicine, Department of Microbiology/Immunology, 950 West Walnut Street, Bldg. R2, Room 302, Indianapolis, IN 46202, Indiana University School of Medicine, Department of Medicine, 950 West Walnut Street, Bldg. R2, Room E435,These authors contributed equally to this work
| | - Maegan Capitano
- Departments of Microbiology and Immunology, Indiana University School of Medicine,These authors contributed equally to this work
| | - James Ropa
- Departments of Microbiology and Immunology, Indiana University School of Medicine,These authors contributed equally to this work
| | - Scott Cooper
- Departments of Microbiology and Immunology, Indiana University School of Medicine
| | - Xinxin Huang
- Departments of Microbiology and Immunology, Indiana University School of Medicine
| | - Hal E. Broxmeyer
- Departments of Microbiology and Immunology, Indiana University School of Medicine,Indiana University School of Medicine, Department of Microbiology/Immunology, 950 West Walnut Street, Bldg. R2, Room 302, Indianapolis, IN 46202, Indiana University School of Medicine, Department of Medicine, 950 West Walnut Street, Bldg. R2, Room E435
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6
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Utrero-Rico A, González-Cuadrado C, Chivite-Lacaba M, Cabrera-Marante O, Laguna-Goya R, Almendro-Vazquez P, Díaz-Pedroche C, Ruiz-Ruigómez M, Lalueza A, Folgueira MD, Vázquez E, Quintas A, Berges-Buxeda MJ, Martín-Rodriguez M, Dopazo A, Serrano-Hernández A, Aguado JM, Paz-Artal E. Alterations in Circulating Monocytes Predict COVID-19 Severity and Include Chromatin Modifications Still Detectable Six Months after Recovery. Biomedicines 2021; 9:1253. [PMID: 34572439 PMCID: PMC8471575 DOI: 10.3390/biomedicines9091253] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 09/09/2021] [Accepted: 09/10/2021] [Indexed: 01/08/2023] Open
Abstract
An early analysis of circulating monocytes may be critical for predicting COVID-19 course and its sequelae. In 131 untreated, acute COVID-19 patients at emergency room arrival, monocytes showed decreased surface molecule expression, including low HLA-DR, in association with an inflammatory cytokine status and limited anti-SARS-CoV-2-specific T cell response. Most of these alterations had normalized in post-COVID-19 patients 6 months after discharge. Acute COVID-19 monocytes transcriptome showed upregulation of anti-inflammatory tissue repair genes such as BCL6, AREG and IL-10 and increased accessibility of chromatin. Some of these transcriptomic and epigenetic features still remained in post-COVID-19 monocytes. Importantly, a poorer expression of surface molecules and low IRF1 gene transcription in circulating monocytes at admission defined a COVID-19 patient group with impaired SARS-CoV-2-specific T cell response and increased risk of requiring intensive care or dying. An early analysis of monocytes may be useful for COVID-19 patient stratification and for designing innate immunity-focused therapies.
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Affiliation(s)
- Alberto Utrero-Rico
- Instituto de Investigación Sanitaria 12 de Octubre (imas12), 28041 Madrid, Spain; (C.G.-C.); (M.C.-L.); (O.C.-M.); (R.L.-G.); (P.A.-V.); (C.D.-P.); (M.R.-R.); (A.L.); (M.D.F.); (M.J.B.-B.); (M.M.-R.); (A.S.-H.); (J.M.A.); (E.P.-A.)
| | - Cecilia González-Cuadrado
- Instituto de Investigación Sanitaria 12 de Octubre (imas12), 28041 Madrid, Spain; (C.G.-C.); (M.C.-L.); (O.C.-M.); (R.L.-G.); (P.A.-V.); (C.D.-P.); (M.R.-R.); (A.L.); (M.D.F.); (M.J.B.-B.); (M.M.-R.); (A.S.-H.); (J.M.A.); (E.P.-A.)
| | - Marta Chivite-Lacaba
- Instituto de Investigación Sanitaria 12 de Octubre (imas12), 28041 Madrid, Spain; (C.G.-C.); (M.C.-L.); (O.C.-M.); (R.L.-G.); (P.A.-V.); (C.D.-P.); (M.R.-R.); (A.L.); (M.D.F.); (M.J.B.-B.); (M.M.-R.); (A.S.-H.); (J.M.A.); (E.P.-A.)
| | - Oscar Cabrera-Marante
- Instituto de Investigación Sanitaria 12 de Octubre (imas12), 28041 Madrid, Spain; (C.G.-C.); (M.C.-L.); (O.C.-M.); (R.L.-G.); (P.A.-V.); (C.D.-P.); (M.R.-R.); (A.L.); (M.D.F.); (M.J.B.-B.); (M.M.-R.); (A.S.-H.); (J.M.A.); (E.P.-A.)
- Department of Immunology, Hospital Universitario 12 de Octubre, 28041 Madrid, Spain
| | - Rocío Laguna-Goya
- Instituto de Investigación Sanitaria 12 de Octubre (imas12), 28041 Madrid, Spain; (C.G.-C.); (M.C.-L.); (O.C.-M.); (R.L.-G.); (P.A.-V.); (C.D.-P.); (M.R.-R.); (A.L.); (M.D.F.); (M.J.B.-B.); (M.M.-R.); (A.S.-H.); (J.M.A.); (E.P.-A.)
- Department of Immunology, Hospital Universitario 12 de Octubre, 28041 Madrid, Spain
| | - Patricia Almendro-Vazquez
- Instituto de Investigación Sanitaria 12 de Octubre (imas12), 28041 Madrid, Spain; (C.G.-C.); (M.C.-L.); (O.C.-M.); (R.L.-G.); (P.A.-V.); (C.D.-P.); (M.R.-R.); (A.L.); (M.D.F.); (M.J.B.-B.); (M.M.-R.); (A.S.-H.); (J.M.A.); (E.P.-A.)
| | - Carmen Díaz-Pedroche
- Instituto de Investigación Sanitaria 12 de Octubre (imas12), 28041 Madrid, Spain; (C.G.-C.); (M.C.-L.); (O.C.-M.); (R.L.-G.); (P.A.-V.); (C.D.-P.); (M.R.-R.); (A.L.); (M.D.F.); (M.J.B.-B.); (M.M.-R.); (A.S.-H.); (J.M.A.); (E.P.-A.)
- Department of Internal Medicine, Hospital Universitario 12 de Octubre, 28041 Madrid, Spain
| | - María Ruiz-Ruigómez
- Instituto de Investigación Sanitaria 12 de Octubre (imas12), 28041 Madrid, Spain; (C.G.-C.); (M.C.-L.); (O.C.-M.); (R.L.-G.); (P.A.-V.); (C.D.-P.); (M.R.-R.); (A.L.); (M.D.F.); (M.J.B.-B.); (M.M.-R.); (A.S.-H.); (J.M.A.); (E.P.-A.)
- Department of Internal Medicine, Hospital Universitario 12 de Octubre, 28041 Madrid, Spain
| | - Antonio Lalueza
- Instituto de Investigación Sanitaria 12 de Octubre (imas12), 28041 Madrid, Spain; (C.G.-C.); (M.C.-L.); (O.C.-M.); (R.L.-G.); (P.A.-V.); (C.D.-P.); (M.R.-R.); (A.L.); (M.D.F.); (M.J.B.-B.); (M.M.-R.); (A.S.-H.); (J.M.A.); (E.P.-A.)
- Department of Internal Medicine, Hospital Universitario 12 de Octubre, 28041 Madrid, Spain
| | - María Dolores Folgueira
- Instituto de Investigación Sanitaria 12 de Octubre (imas12), 28041 Madrid, Spain; (C.G.-C.); (M.C.-L.); (O.C.-M.); (R.L.-G.); (P.A.-V.); (C.D.-P.); (M.R.-R.); (A.L.); (M.D.F.); (M.J.B.-B.); (M.M.-R.); (A.S.-H.); (J.M.A.); (E.P.-A.)
- Department of Microbiology, Hospital Universitario 12 de Octubre, 28041 Madrid, Spain
| | - Enrique Vázquez
- Genomics Unit, Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain; (E.V.); (A.Q.); (A.D.)
| | - Ana Quintas
- Genomics Unit, Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain; (E.V.); (A.Q.); (A.D.)
| | - Marcos J. Berges-Buxeda
- Instituto de Investigación Sanitaria 12 de Octubre (imas12), 28041 Madrid, Spain; (C.G.-C.); (M.C.-L.); (O.C.-M.); (R.L.-G.); (P.A.-V.); (C.D.-P.); (M.R.-R.); (A.L.); (M.D.F.); (M.J.B.-B.); (M.M.-R.); (A.S.-H.); (J.M.A.); (E.P.-A.)
| | - Moisés Martín-Rodriguez
- Instituto de Investigación Sanitaria 12 de Octubre (imas12), 28041 Madrid, Spain; (C.G.-C.); (M.C.-L.); (O.C.-M.); (R.L.-G.); (P.A.-V.); (C.D.-P.); (M.R.-R.); (A.L.); (M.D.F.); (M.J.B.-B.); (M.M.-R.); (A.S.-H.); (J.M.A.); (E.P.-A.)
| | - Ana Dopazo
- Genomics Unit, Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain; (E.V.); (A.Q.); (A.D.)
| | - Antonio Serrano-Hernández
- Instituto de Investigación Sanitaria 12 de Octubre (imas12), 28041 Madrid, Spain; (C.G.-C.); (M.C.-L.); (O.C.-M.); (R.L.-G.); (P.A.-V.); (C.D.-P.); (M.R.-R.); (A.L.); (M.D.F.); (M.J.B.-B.); (M.M.-R.); (A.S.-H.); (J.M.A.); (E.P.-A.)
- Department of Immunology, Hospital Universitario 12 de Octubre, 28041 Madrid, Spain
| | - José María Aguado
- Instituto de Investigación Sanitaria 12 de Octubre (imas12), 28041 Madrid, Spain; (C.G.-C.); (M.C.-L.); (O.C.-M.); (R.L.-G.); (P.A.-V.); (C.D.-P.); (M.R.-R.); (A.L.); (M.D.F.); (M.J.B.-B.); (M.M.-R.); (A.S.-H.); (J.M.A.); (E.P.-A.)
- Unit of Infectious Diseases, Hospital Universitario 12 de Octubre, 28041 Madrid, Spain
| | - Estela Paz-Artal
- Instituto de Investigación Sanitaria 12 de Octubre (imas12), 28041 Madrid, Spain; (C.G.-C.); (M.C.-L.); (O.C.-M.); (R.L.-G.); (P.A.-V.); (C.D.-P.); (M.R.-R.); (A.L.); (M.D.F.); (M.J.B.-B.); (M.M.-R.); (A.S.-H.); (J.M.A.); (E.P.-A.)
- Department of Immunology, Hospital Universitario 12 de Octubre, 28041 Madrid, Spain
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7
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Vázquez-Jiménez A, Avila-Ponce De León UE, Matadamas-Guzman M, Muciño-Olmos EA, Martínez-López YE, Escobedo-Tapia T, Resendis-Antonio O. On Deep Landscape Exploration of COVID-19 Patients Cells and Severity Markers. Front Immunol 2021; 12:705646. [PMID: 34603282 PMCID: PMC8481922 DOI: 10.3389/fimmu.2021.705646] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 08/23/2021] [Indexed: 12/12/2022] Open
Abstract
COVID-19 is a disease with a spectrum of clinical responses ranging from moderate to critical. To study and control its effects, a large number of researchers are focused on two substantial aims. On the one hand, the discovery of diverse biomarkers to classify and potentially anticipate the disease severity of patients. These biomarkers could serve as a medical criterion to prioritize attention to those patients with higher prone to severe responses. On the other hand, understanding how the immune system orchestrates its responses in this spectrum of disease severities is a fundamental issue required to design new and optimized therapeutic strategies. In this work, using single-cell RNAseq of bronchoalveolar lavage fluid of nine patients with COVID-19 and three healthy controls, we contribute to both aspects. First, we presented computational supervised machine-learning models with high accuracy in classifying the disease severity (moderate and severe) in patients with COVID-19 starting from single-cell data from bronchoalveolar lavage fluid. Second, we identified regulatory mechanisms from the heterogeneous cell populations in the lungs microenvironment that correlated with different clinical responses. Given the results, patients with moderate COVID-19 symptoms showed an activation/inactivation profile for their analyzed cells leading to a sequential and innocuous immune response. In comparison, severe patients might be promoting cytotoxic and pro-inflammatory responses in a systemic fashion involving epithelial and immune cells without the possibility to develop viral clearance and immune memory. Consequently, we present an in-depth landscape analysis of how transcriptional factors and pathways from these heterogeneous populations can regulate their expression to promote or restrain an effective immune response directly linked to the patients prognosis.
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Affiliation(s)
- Aarón Vázquez-Jiménez
- Human Systems Biology Laboratory, Instituto Nacional de Medicina Genómica (INMEGEN), Mexico City, Mexico
| | - Ugo Enrique Avila-Ponce De León
- Human Systems Biology Laboratory, Instituto Nacional de Medicina Genómica (INMEGEN), Mexico City, Mexico
- Programa de Doctorado en Ciencias Biológicas, UNAM, Mexico City, Mexico
| | - Meztli Matadamas-Guzman
- Human Systems Biology Laboratory, Instituto Nacional de Medicina Genómica (INMEGEN), Mexico City, Mexico
- Programa de Doctorado en Ciencias Biomédicas, UNAM, Mexico City, Mexico
| | - Erick Andrés Muciño-Olmos
- Human Systems Biology Laboratory, Instituto Nacional de Medicina Genómica (INMEGEN), Mexico City, Mexico
- Programa de Doctorado en Ciencias Biomédicas, UNAM, Mexico City, Mexico
| | - Yoscelina E. Martínez-López
- Human Systems Biology Laboratory, Instituto Nacional de Medicina Genómica (INMEGEN), Mexico City, Mexico
- Programa de Doctorado en Ciencias Médicas y de la Salud, UNAM, Mexico City, Mexico
| | - Thelma Escobedo-Tapia
- Human Systems Biology Laboratory, Instituto Nacional de Medicina Genómica (INMEGEN), Mexico City, Mexico
- Programa de Maestría y Doctorado en Ciencias Bioquímicas, UNAM, Mexico City, Mexico
| | - Osbaldo Resendis-Antonio
- Human Systems Biology Laboratory, Instituto Nacional de Medicina Genómica (INMEGEN), Mexico City, Mexico
- Coordinación de la Investigación Científica - Red de Apoyo a la Investigación, UNAM, Mexico City, Mexico
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Inhibition of inflammatory signaling in Pax5 mutant cells mitigates B-cell leukemogenesis. Sci Rep 2020; 10:19189. [PMID: 33154497 PMCID: PMC7644722 DOI: 10.1038/s41598-020-76206-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 10/22/2020] [Indexed: 12/11/2022] Open
Abstract
PAX5 is one of the most frequently mutated genes in B-cell acute lymphoblastic leukemia (B-ALL), and children with inherited preleukemic PAX5 mutations are at a higher risk of developing the disease. Abnormal profiles of inflammatory markers have been detected in neonatal blood spot samples of children who later developed B-ALL. However, how inflammatory signals contribute to B-ALL development is unclear. Here, we demonstrate that Pax5 heterozygosis, in the presence of infections, results in the enhanced production of the inflammatory cytokine interleukin-6 (IL-6), which appears to act in an autocrine fashion to promote leukemia growth. Furthermore, in vivo genetic downregulation of IL-6 in these Pax5 heterozygous mice retards B-cell leukemogenesis, and in vivo pharmacologic inhibition of IL-6 with a neutralizing antibody in Pax5 mutant mice with B-ALL clears leukemic cells. Additionally, this novel IL–6 signaling paradigm identified in mice was also substantiated in humans. Altogether, our studies establish aberrant IL6 expression caused by Pax5 loss as a hallmark of Pax5-dependent B-ALL and the IL6 as a therapeutic vulnerability for B-ALL characterized by PAX5 loss.
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9
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Du L, Sun J, Zhang W, Wang Y, Zhu H, Liu T, Gao M, Zheng C, Zhang Y, Liu Y, Liu Y, Shao S, Zhang X, Leng Q, Auwerx J, Duan S. Macrophage NCOR1 Deficiency Ameliorates Myocardial Infarction and Neointimal Hyperplasia in Mice. J Am Heart Assoc 2020; 9:e015862. [PMID: 32720575 PMCID: PMC7792266 DOI: 10.1161/jaha.120.015862] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Background NCOR1 (nuclear receptor corepressor 1) is an essential coregulator of gene transcription. It has been shown that NCOR1 in macrophages plays important roles in metabolic regulation. However, the function of macrophage NCOR1 in response to myocardial infarction (MI) or vascular wire injury has not been elucidated. Methods and Results Here, using macrophage Ncor1 knockout mouse in combination with a mouse model of MI, we demonstrated that macrophage NCOR1 deficiency significantly reduced infarct size and improved cardiac function after MI. In addition, macrophage NCOR1 deficiency markedly inhibited neointimal hyperplasia and vascular remodeling in a mouse model of arterial wire injury. Inflammation and macrophage proliferation were substantially attenuated in hearts and arteries of macrophage Ncor1 knockout mice after MI and arterial wire injury, respectively. Cultured primary macrophages from macrophage Ncor1 knockout mice manifested lower expression of inflammatory genes upon stimulation by interleukin‐1β, interleukin‐6, or lipopolysaccharide, together with much less activation of inflammatory signaling cascades including signal transducer and activator of transcription 1 and nuclear factor‐κB. Furthermore, macrophage Ncor1 knockout macrophages were much less proliferative in culture, with inhibited cell cycle progression compared with control cells. Conclusions Collectively, our data have demonstrated that NCOR1 is a critical regulator of macrophage inflammation and proliferation and that deficiency of NCOR1 in macrophages attenuates MI and neointimal hyperplasia. Therefore, macrophage NCOR1 may serve as a potential therapeutic target for MI and restenosis.
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Affiliation(s)
- Lin‐Juan Du
- Laboratory of Oral Microbiota and Systemic DiseasesShanghai Ninth People's HospitalCollege of StomatologyShanghai Jiao Tong University School of MedicineShanghaiChina
- National Clinical Research Center for Oral DiseasesShanghai Key Laboratory of Stomatology & Shanghai Research Institute of StomatologyShanghaiChina
| | - Jian‐Yong Sun
- Laboratory of Oral Microbiota and Systemic DiseasesShanghai Ninth People's HospitalCollege of StomatologyShanghai Jiao Tong University School of MedicineShanghaiChina
- National Clinical Research Center for Oral DiseasesShanghai Key Laboratory of Stomatology & Shanghai Research Institute of StomatologyShanghaiChina
| | - Wu‐Chang Zhang
- Laboratory of Oral Microbiota and Systemic DiseasesShanghai Ninth People's HospitalCollege of StomatologyShanghai Jiao Tong University School of MedicineShanghaiChina
- National Clinical Research Center for Oral DiseasesShanghai Key Laboratory of Stomatology & Shanghai Research Institute of StomatologyShanghaiChina
| | - Yong‐Li Wang
- Laboratory of Oral Microbiota and Systemic DiseasesShanghai Ninth People's HospitalCollege of StomatologyShanghai Jiao Tong University School of MedicineShanghaiChina
- National Clinical Research Center for Oral DiseasesShanghai Key Laboratory of Stomatology & Shanghai Research Institute of StomatologyShanghaiChina
| | - Hong Zhu
- Laboratory of Oral Microbiota and Systemic DiseasesShanghai Ninth People's HospitalCollege of StomatologyShanghai Jiao Tong University School of MedicineShanghaiChina
- National Clinical Research Center for Oral DiseasesShanghai Key Laboratory of Stomatology & Shanghai Research Institute of StomatologyShanghaiChina
| | - Ting Liu
- Laboratory of Oral Microbiota and Systemic DiseasesShanghai Ninth People's HospitalCollege of StomatologyShanghai Jiao Tong University School of MedicineShanghaiChina
- National Clinical Research Center for Oral DiseasesShanghai Key Laboratory of Stomatology & Shanghai Research Institute of StomatologyShanghaiChina
| | - Ming‐Zhu Gao
- Engineering Research Center of Cell & Therapeutic AntibodyMinistry of Education, and School of PharmacyShanghai Jiao Tong UniversityShanghaiChina
| | - Chen Zheng
- Department of StomatologyThe Children's HospitalZhejiang University School of MedicineHangzhouChina
| | - Yu‐Yao Zhang
- Laboratory of Oral Microbiota and Systemic DiseasesShanghai Ninth People's HospitalCollege of StomatologyShanghai Jiao Tong University School of MedicineShanghaiChina
- National Clinical Research Center for Oral DiseasesShanghai Key Laboratory of Stomatology & Shanghai Research Institute of StomatologyShanghaiChina
| | - Yuan Liu
- Laboratory of Oral Microbiota and Systemic DiseasesShanghai Ninth People's HospitalCollege of StomatologyShanghai Jiao Tong University School of MedicineShanghaiChina
- National Clinical Research Center for Oral DiseasesShanghai Key Laboratory of Stomatology & Shanghai Research Institute of StomatologyShanghaiChina
| | - Yan Liu
- Laboratory of Oral Microbiota and Systemic DiseasesShanghai Ninth People's HospitalCollege of StomatologyShanghai Jiao Tong University School of MedicineShanghaiChina
- National Clinical Research Center for Oral DiseasesShanghai Key Laboratory of Stomatology & Shanghai Research Institute of StomatologyShanghaiChina
| | - Shuai Shao
- Department of NeurosurgeryRen Ji HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Xue‐Qing Zhang
- Engineering Research Center of Cell & Therapeutic AntibodyMinistry of Education, and School of PharmacyShanghai Jiao Tong UniversityShanghaiChina
| | - Qibin Leng
- Key Laboratory of Molecular Virology and ImmunologyInstitut Pasteur of ShanghaiShanghai Institutes for Biological SciencesChinese Academy of SciencesUniversity of the Chinese Academy of SciencesShanghaiChina
| | - Johan Auwerx
- Laboratory of Integrative and Systems PhysiologyInstitute of BioengineeringÉcole Polytechnique Fédérale de Lausanne (EPFL)LausanneSwitzerland
| | - Sheng‐Zhong Duan
- Laboratory of Oral Microbiota and Systemic DiseasesShanghai Ninth People's HospitalCollege of StomatologyShanghai Jiao Tong University School of MedicineShanghaiChina
- National Clinical Research Center for Oral DiseasesShanghai Key Laboratory of Stomatology & Shanghai Research Institute of StomatologyShanghaiChina
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10
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Bcl6 and Blimp1 reciprocally regulate ST2 + Treg-cell development in the context of allergic airway inflammation. J Allergy Clin Immunol 2020; 146:1121-1136.e9. [PMID: 32179158 DOI: 10.1016/j.jaci.2020.03.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 02/12/2020] [Accepted: 03/03/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND Bcl6 is required for the development of T follicular helper cells and T follicular regulatory (Tfr) cells that regulate germinal center responses. Bcl6 also affects the function of regulatory T (Treg) cells. OBJECTIVE The goal of this study was to define the functions of Bcl6 in Treg cells, including Tfr cells, in the context of allergic airway inflammation. METHODS We used a model of house dust mite sensitization to challenge wild-type, Bcl6fl/fl Foxp3-Cre, and Prdm1 (Blimp1)fl/fl Foxp3-Cre mice to study the reciprocal roles of Bcl6 and Blimp1 in allergic airway inflammation. RESULTS In the house dust mite model, Tfr cells repress the production of IgE and Bcl6+ Treg cells suppress the generation of type 2 cytokine-producing cells in the lungs. In mice with Bcl6-deficient Treg cells, twice as many ST2+ (IL-33R+) Treg cells develop as are observed in wild-type mice. ST2+ Treg cells in the context of allergic airway inflammation are Blimp1 dependent, express type 2 cytokines, and share features of visceral adipose tissue Treg cells. Bcl6-deficient Treg cells are more susceptible, and Blimp1-deficient Treg cells are resistant, to acquiring the ST2+ Treg-cell phenotype in vitro and in vivo in response to IL-33. Bcl6-deficient ST2+ Treg cells, but not Bcl6-deficient ST2+ conventional T cells, strongly promote allergic airway inflammation when transferred into recipient mice. Lastly, ST2 is required for the exacerbated allergic airway inflammation in Bcl6fl/fl Foxp3-Cre mice. CONCLUSIONS During allergic airway inflammation, Bcl6 and Blimp1 play dual roles in regulating Tfr-cell activity in the germinal center and in the development of ST2+ Treg cells that promote type 2 cytokine responses.
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11
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Li Q, Zhou L, Wang L, Li S, Xu G, Gu H, Li D, Liu M, Fang L, Wang Z, Han S, Zheng B. Bcl6 modulates innate immunity by controlling macrophage activity and plays critical role in experimental autoimmune encephalomyelitis. Eur J Immunol 2020; 50:525-536. [DOI: 10.1002/eji.201948299] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 12/04/2019] [Accepted: 01/16/2020] [Indexed: 11/10/2022]
Affiliation(s)
- Qing Li
- Institute of Biomedical Science East China Normal University Shanghai China
| | - Lei Zhou
- Institute of Biomedical Science East China Normal University Shanghai China
| | - Ling Wang
- Institute of Biomedical Science East China Normal University Shanghai China
| | - Shiqiang Li
- Institute of Biomedical Science East China Normal University Shanghai China
| | - Guiliang Xu
- Institute of Biomedical Science East China Normal University Shanghai China
| | - Haijuan Gu
- Institute of Biomedical Science East China Normal University Shanghai China
| | - Dali Li
- Institute of Biomedical Science East China Normal University Shanghai China
| | - Mingyao Liu
- Institute of Biomedical Science East China Normal University Shanghai China
| | - Lei Fang
- Department of Pathology & Immunology Baylor College of Medicine Houston TX USA
| | - Zhengyi Wang
- Department of Pathology & Immunology Baylor College of Medicine Houston TX USA
| | - Shuhua Han
- Department of Pathology & Immunology Baylor College of Medicine Houston TX USA
| | - Biao Zheng
- Institute of Biomedical Science East China Normal University Shanghai China
- Department of Pathology & Immunology Baylor College of Medicine Houston TX USA
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12
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Wu CJ, Cho S, Huang HY, Lu CH, Russ J, Cruz LO, da Cunha FF, Chen MC, Lin LL, Warner LM, Liao HK, Utzschneider DT, Quon S, Berner J, Camara NOS, Zehn D, Belmonte JCI, Chen LC, Huang SF, Kuo ML, Lu LF. MiR-23~27~24-mediated control of humoral immunity reveals a TOX-driven regulatory circuit in follicular helper T cell differentiation. SCIENCE ADVANCES 2019; 5:eaaw1715. [PMID: 31844658 PMCID: PMC6905868 DOI: 10.1126/sciadv.aaw1715] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 09/23/2019] [Indexed: 05/08/2023]
Abstract
Follicular helper T (TFH) cells are essential for generating protective humoral immunity. To date, microRNAs (miRNAs) have emerged as important players in regulating TFH cell biology. Here, we show that loss of miR-23~27~24 clusters in T cells resulted in elevated TFH cell frequencies upon different immune challenges, whereas overexpression of this miRNA family led to reduced TFH cell responses. Mechanistically, miR-23~27~24 clusters coordinately control TFH cells through targeting a network of genes that are crucial for TFH cell biology. Among them, thymocyte selection-associated HMG-box protein (TOX) was identified as a central transcription regulator in TFH cell development. TOX is highly up-regulated in both mouse and human TFH cells in a BCL6-dependent manner. In turn, TOX promotes the expression of multiple molecules that play critical roles in TFH cell differentiation and function. Collectively, our results establish a key miRNA regulon that maintains optimal TFH cell responses for resultant humoral immunity.
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Affiliation(s)
- Cheng-Jang Wu
- Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093, USA
| | - Sunglim Cho
- Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093, USA
| | - Hsi-Yuan Huang
- Department of Laboratory Medicine, China Medical University Hospital, China Medical University, Taichung, Taiwan
- School of Life and Health Sciences and Warshel Institute for Computational Biology, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, P. R. China
| | - Chun-Hao Lu
- Department of Microbiology and Immunology, Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Tao-Yuan, Taiwan
| | - Jasmin Russ
- Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093, USA
| | - Leilani O. Cruz
- Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093, USA
| | - Flavia Franco da Cunha
- Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093, USA
- Department of Nephrology, Federal University of Sao Paulo, Sao Paulo, Brazil
| | - Mei-Chi Chen
- Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093, USA
| | - Ling-Li Lin
- Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093, USA
| | - Lindsey M. Warner
- Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093, USA
| | - Hsin-Kai Liao
- Gene Expression Laboratory, Salk Institute for Biological Studies, La Jolla, CA 92037, USA
- Universidad Catolica San Antonio de Murcia, Guadalupe 30107, Spain
| | - Daniel T. Utzschneider
- Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093, USA
- Cellular and Molecular Medicine, UC San Diego, La Jolla, CA 92093, USA
| | - Sara Quon
- Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093, USA
| | - Jacqueline Berner
- Division of Animal Physiology and Immunology, School of Life Sciences Weihenstephan, Technical University of Munich, 85354 Freising, Germany
| | - Niels Olsen Saraiva Camara
- Department of Nephrology, Federal University of Sao Paulo, Sao Paulo, Brazil
- Department of Immunology, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - Dietmar Zehn
- Division of Animal Physiology and Immunology, School of Life Sciences Weihenstephan, Technical University of Munich, 85354 Freising, Germany
| | | | - Li-Chen Chen
- Division of Allergy, Asthma, and Rheumatology, Department of Pediatrics, Chang Gung Memorial Hospital, Tao-Yuan, Taiwan
| | - Shiang-Fu Huang
- Department of Otolaryngology, Head and Neck Surgery, Chang Gung Memorial Hospital and Department of Public Health, Chang Gung University, Tao-Yuan, Taiwan
| | - Ming-Ling Kuo
- Department of Microbiology and Immunology, Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Tao-Yuan, Taiwan
- Division of Allergy, Asthma, and Rheumatology, Department of Pediatrics, Chang Gung Memorial Hospital, Tao-Yuan, Taiwan
- Chang Gung Immunology Consortium, Chang Gung Memorial Hospital and Chang Gung University, Tao-Yuan, Taiwan
| | - Li-Fan Lu
- Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093, USA
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA
- Center for Microbiome Innovation, University of California, San Diego, La Jolla, CA 92093, USA
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13
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Transcriptional Modulation of the Host Immunity Mediated by Cytokines and Transcriptional Factors in Plasmodium falciparum-Infected Patients of North-East India. Biomolecules 2019; 9:biom9100600. [PMID: 31614626 PMCID: PMC6843480 DOI: 10.3390/biom9100600] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 09/20/2019] [Accepted: 09/21/2019] [Indexed: 11/17/2022] Open
Abstract
Complications due to malaria are caused mostly by host immunological responses. Plasmodium falciparum subverts host immunity by various strategies, including modulation in the host immune responses by regulating cytokines. The transcriptional alterations of major cytokines and immunoregulators were analyzed in this study through gene expression profiling in clinically defined subgroups of P. falciparum patients. Malaria patients were included from Dhalai district hospital of Tripura with uncomplicated malaria (UC) and severe malaria (SM) and healthy controls from endemic and non-endemic areas of India. qPCR gene expression analysis was performed for all factors and they were grouped into three clusters based on their altered expressions. The first cluster was downregulated with an increased parasitic burden which included T-BET, GATA3, EOMES, TGF-β, STAT4, STAT6 and cytokines IFN-γ, IL-12, IL-4, IL-5, and IL-13. RANTES, IL-8, CCR8, and CXCR3 were decreased in the SM group. The second cluster was upregulated with severity and included TNF-α, IL-10, IL-1β and IL-7. PD-1 and BCL6 were increased in the SM group. The third cluster comprised of NF-κB and was not altered. The level of perforin was suppressed while GrB expression was elevated in SM. P. falciparum malaria burden is characterized by the modulation of host immunity via compromization of T cell-mediated responses and suppression of innate immune-regulators.
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14
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Deciphering the Dynamic Transcriptional and Post-transcriptional Networks of Macrophages in the Healthy Heart and after Myocardial Injury. Cell Rep 2019; 23:622-636. [PMID: 29642017 DOI: 10.1016/j.celrep.2018.03.029] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 02/05/2018] [Accepted: 03/07/2018] [Indexed: 12/30/2022] Open
Abstract
Macrophage plasticity has been studied in vitro, but transcriptional regulation upon injury is poorly understood. We generated a valuable dataset that captures transcriptional changes in the healthy heart and after myocardial injury, revealing a dynamic transcriptional landscape of macrophage activation. Partial deconvolution suggested that post-injury macrophages exhibit overlapping activation of pro-inflammatory and anti-inflammatory programs rather than aligning to canonical M1/M2 programs. Furthermore, simulated dynamics and experimental validation of a regulatory core of the underlying gene-regulatory network revealed a negative-feedback loop that limits initial inflammation via hypoxia-mediated upregulation of Il10. Our results also highlight the prominence of post-transcriptional regulation (miRNAs, mRNA decay, and lincRNAs) in attenuating the myocardial injury-induced inflammatory response. We also identified a cardiac-macrophage-specific gene signature (e.g., Egfr and Lifr) and time-specific markers for macrophage populations (e.g., Lyve1, Cd40, and Mrc1). Altogether, these data provide a core resource for deciphering the transcriptional network in cardiac macrophages in vivo.
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15
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A partial agonist for retinoid X receptor mitigates experimental colitis. Int Immunol 2018; 31:251-262. [DOI: 10.1093/intimm/dxy089] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Accepted: 12/24/2018] [Indexed: 12/14/2022] Open
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16
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Vargas JE, Kubesch N, Hernandéz-Ferrer C, Carrasco-Turigas G, Bustamante M, Nieuwenhuijsen M, González JR. A systemic approach to identify signaling pathways activated during short-term exposure to traffic-related urban air pollution from human blood. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:29572-29583. [PMID: 30141164 DOI: 10.1007/s11356-018-3009-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 08/17/2018] [Indexed: 06/08/2023]
Abstract
The molecular mechanisms that promote pathologic alterations in human physiology mediated by short-term exposure to traffic pollutants remains not well understood. This work was to develop mechanistic networks to determine which specific pathways are activated by real-world exposures of traffic-related air pollution (TRAP) during rest and moderate physical activity (PA). A controlled crossover study to compare whole blood gene expression pre and post short-term exposure to high and low of TRAP was performed together with systems biology analysis. Twenty-eight healthy volunteers aged between 21 and 53 years were recruited. These subjects were exposed during 2 h to different pollution levels (high and low TRAP levels), while either cycling or resting. Global transcriptome profile of each condition was performed from human whole blood samples. Microarrays analysis was performed to obtain differential expressed genes (DEG) to be used as initial input for GeneMANIA software to obtain protein-protein (PPI) networks. Two networks were found reflecting high or low TRAP levels, which shared only 5.6 and 15.5% of its nodes, suggesting specific cell signaling pathways being activated in each environmental condition. However, gene ontology analysis of each PPI network suggests that each level of TRAP regulate common members of NF-κB signaling pathway. Our work provides the first approach describing mechanistic networks to understand TRAP effects on a system level.
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Affiliation(s)
- José Eduardo Vargas
- Passo Fundo University (UPF), Passo Fundo, Rio Grande do Sul, Brazil.
- Infant Center, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil.
| | - Nadine Kubesch
- ISGlobal, Center for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- Centre for Epidemiology and Screening, University of Copenhagen, Copenhagen, Denmark
| | - Carles Hernandéz-Ferrer
- ISGlobal, Center for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- Boston Children's Hospital, Boston, USA
| | - Glória Carrasco-Turigas
- ISGlobal, Center for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
| | - Mariona Bustamante
- ISGlobal, Center for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
| | - Mark Nieuwenhuijsen
- ISGlobal, Center for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- Centro de Investigación Biomédica en Red de Epidemiología y Salud, Pública (CIBERESP), Barcelona, Spain
| | - Juan R González
- ISGlobal, Center for Research in Environmental Epidemiology (CREAL), Barcelona, Spain.
- Universitat Pompeu Fabra (UPF), Barcelona, Spain.
- Centro de Investigación Biomédica en Red de Epidemiología y Salud, Pública (CIBERESP), Barcelona, Spain.
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17
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Baptista D, Mach F, Brandt KJ. Follicular regulatory T cell in atherosclerosis. J Leukoc Biol 2018; 104:925-930. [PMID: 30134501 DOI: 10.1002/jlb.mr1117-469r] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 06/25/2018] [Accepted: 06/26/2018] [Indexed: 12/24/2022] Open
Abstract
Atherosclerosis is a chronic inflammatory disease involving the infiltration of immune cells, such as monocytes/macrophages, neutrophils, T cells, and B cells, into the inner layer of vessel walls. T and B cell functions in the process of atherogenesis, as well as their mutual regulation, have been investigated but several aspects remain to be clarified. In the present review, we give a brief overview of the functions of follicular regulatory T cell (Tfr) on follicular T (Tfh) and B cell regulation related to atherosclerosis pathogenesis, including their influence on lymphangiogenesis and lipoprotein metabolism. We will also discuss their potential therapeutics properties in the resolution of established atherosclerotic lesions.
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Affiliation(s)
- Daniela Baptista
- Division of Cardiology, Foundation for Medical Researches, Department of Medicine Specialties, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - François Mach
- Division of Cardiology, Foundation for Medical Researches, Department of Medicine Specialties, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Karim J Brandt
- Division of Cardiology, Foundation for Medical Researches, Department of Medicine Specialties, Faculty of Medicine, University of Geneva, Geneva, Switzerland
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18
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Juszczak GR, Stankiewicz AM. Glucocorticoids, genes and brain function. Prog Neuropsychopharmacol Biol Psychiatry 2018; 82:136-168. [PMID: 29180230 DOI: 10.1016/j.pnpbp.2017.11.020] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 10/18/2017] [Accepted: 11/23/2017] [Indexed: 01/02/2023]
Abstract
The identification of key genes in transcriptomic data constitutes a huge challenge. Our review of microarray reports revealed 88 genes whose transcription is consistently regulated by glucocorticoids (GCs), such as cortisol, corticosterone and dexamethasone, in the brain. Replicable transcriptomic data were combined with biochemical and physiological data to create an integrated view of the effects induced by GCs. The most frequently reported genes were Errfi1 and Ddit4. Their up-regulation was associated with the altered transcription of genes regulating growth factor and mTORC1 signaling (Gab1, Tsc22d3, Dusp1, Ndrg2, Ppp5c and Sesn1) and progression of the cell cycle (Ccnd1, Cdkn1a and Cables1). The GC-induced reprogramming of cell function involves changes in the mRNA level of genes responsible for the regulation of transcription (Klf9, Bcl6, Klf15, Tle3, Cxxc5, Litaf, Tle4, Jun, Sox4, Sox2, Sox9, Irf1, Sall2, Nfkbia and Id1) and the selective degradation of mRNA (Tob2). Other genes are involved in the regulation of metabolism (Gpd1, Aldoc and Pdk4), actin cytoskeleton (Myh2, Nedd9, Mical2, Rhou, Arl4d, Osbpl3, Arhgef3, Sdc4, Rdx, Wipf3, Chst1 and Hepacam), autophagy (Eva1a and Plekhf1), vesicular transport (Rhob, Ehd3, Vps37b and Scamp2), gap junctions (Gjb6), immune response (Tiparp, Mertk, Lyve1 and Il6r), signaling mediated by thyroid hormones (Thra and Sult1a1), calcium (Calm2), adrenaline/noradrenaline (Adcy9 and Adra1d), neuropeptide Y (Npy1r) and histamine (Hdc). GCs also affected genes involved in the synthesis of polyamines (Azin1) and taurine (Cdo1). The actions of GCs are restrained by feedback mechanisms depending on the transcription of Sgk1, Fkbp5 and Nr3c1. A side effect induced by GCs is increased production of reactive oxygen species. Available data show that the brain's response to GCs is part of an emergency mode characterized by inactivation of non-core activities, restrained inflammation, restriction of investments (growth), improved efficiency of energy production and the removal of unnecessary or malfunctioning cellular components to conserve energy and maintain nutrient supply during the stress response.
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Affiliation(s)
- Grzegorz R Juszczak
- Department of Animal Behavior, Institute of Genetics and Animal Breeding, Jastrzebiec, ul. Postepu 36A, 05-552 Magdalenka, Poland.
| | - Adrian M Stankiewicz
- Department of Molecular Biology, Institute of Genetics and Animal Breeding, Jastrzebiec, ul. Postepu 36A, 05-552 Magdalenka, Poland
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Slone WL, Moses BS, Hare I, Evans R, Piktel D, Gibson LF. BCL6 modulation of acute lymphoblastic leukemia response to chemotherapy. Oncotarget 2018; 7:23439-53. [PMID: 27015556 PMCID: PMC5029638 DOI: 10.18632/oncotarget.8273] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Accepted: 02/28/2016] [Indexed: 01/26/2023] Open
Abstract
The bone marrow niche has a significant impact on acute lymphoblastic leukemia (ALL) cell phenotype. Of clinical relevance is the frequency with which quiescent leukemic cells, in this niche, survive treatment and contribute to relapse. This study suggests that marrow microenvironment regulation of BCL6 in ALL is one factor that may be involved in the transition between proliferative and quiescent states of ALL cells. Utilizing ALL cell lines, and primary patient tumor cells we observed that tumor cell BCL6 protein abundance is decreased in the presence of primary human bone marrow stromal cells (BMSC) and osteoblasts (HOB). Chemical inhibition, or shRNA knockdown, of BCL6 in ALL cells resulted in diminished ALL proliferation. As many chemotherapy regimens require tumor cell proliferation for optimal efficacy, we investigated the consequences of constitutive BCL6 expression in leukemic cells during co-culture with BMSC or HOB. Forced chronic expression of BCL6 during co-culture with BMSC or HOB sensitized the tumor to chemotherapy induced cell death. Combination treatment of caffeine, which increases BCL6 expression in ALL cells, with chemotherapy extended the event free survival of mice. These data suggest that BCL6 is one factor, modulated by microenvironment derived cues that may contribute to regulation of ALL therapeutic response.
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Affiliation(s)
- William L Slone
- Alexander B. Osborn Hematopoietic Malignancy and Transplantation Program of The WVU Cancer Institute, Robert C. Byrd Health Sciences Center, West Virginia University School of Medicine, Morgantown, WV, USA
| | - Blake S Moses
- Alexander B. Osborn Hematopoietic Malignancy and Transplantation Program of The WVU Cancer Institute, Robert C. Byrd Health Sciences Center, West Virginia University School of Medicine, Morgantown, WV, USA
| | - Ian Hare
- Alexander B. Osborn Hematopoietic Malignancy and Transplantation Program of The WVU Cancer Institute, Robert C. Byrd Health Sciences Center, West Virginia University School of Medicine, Morgantown, WV, USA.,Department of Microbiology, Immunology and Cell Biology, Robert C. Byrd Health Sciences Center, West Virginia University School of Medicine, Morgantown, WV, USA
| | - Rebecca Evans
- Alexander B. Osborn Hematopoietic Malignancy and Transplantation Program of The WVU Cancer Institute, Robert C. Byrd Health Sciences Center, West Virginia University School of Medicine, Morgantown, WV, USA
| | - Debbie Piktel
- Alexander B. Osborn Hematopoietic Malignancy and Transplantation Program of The WVU Cancer Institute, Robert C. Byrd Health Sciences Center, West Virginia University School of Medicine, Morgantown, WV, USA
| | - Laura F Gibson
- Alexander B. Osborn Hematopoietic Malignancy and Transplantation Program of The WVU Cancer Institute, Robert C. Byrd Health Sciences Center, West Virginia University School of Medicine, Morgantown, WV, USA.,Department of Microbiology, Immunology and Cell Biology, Robert C. Byrd Health Sciences Center, West Virginia University School of Medicine, Morgantown, WV, USA
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20
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Le Sommer S, Morrice N, Pesaresi M, Thompson D, Vickers MA, Murray GI, Mody N, Neel BG, Bence KK, Wilson HM, Delibegović M. Deficiency in Protein Tyrosine Phosphatase PTP1B Shortens Lifespan and Leads to Development of Acute Leukemia. Cancer Res 2018; 78:75-87. [PMID: 29122767 PMCID: PMC5756472 DOI: 10.1158/0008-5472.can-17-0946] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 06/29/2017] [Accepted: 10/25/2017] [Indexed: 01/05/2023]
Abstract
Protein tyrosine phosphatase PTP1B is a critical regulator of signaling pathways controlling metabolic homeostasis, cell proliferation, and immunity. In this study, we report that global or myeloid-specific deficiency of PTP1B in mice decreases lifespan. We demonstrate that myeloid-specific deficiency of PTP1B is sufficient to promote the development of acute myeloid leukemia. LysM-PTP1B-/- mice lacking PTP1B in the innate myeloid cell lineage displayed a dysregulation of bone marrow cells with a rapid decline in population at midlife and a concomitant increase in peripheral blood blast cells. This phenotype manifested further with extramedullary tumors, hepatic macrophage infiltration, and metabolic reprogramming, suggesting increased hepatic lipid metabolism prior to overt tumor development. Mechanistic investigations revealed an increase in anti-inflammatory M2 macrophage responses in liver and spleen, as associated with increased expression of arginase I and the cytokines IL10 and IL4. We also documented STAT3 hypersphosphorylation and signaling along with JAK-dependent upregulation of antiapoptotic proteins Bcl2 and BclXL. Our results establish a tumor suppressor role for PTP1B in the myeloid lineage cells, with evidence that its genetic inactivation in mice is sufficient to drive acute myeloid leukemia.Significance: This study defines a tumor suppressor function for the protein tyrosine phosphatase PTP1B in myeloid lineage cells, with evidence that its genetic inactivation in mice is sufficient to drive acute myeloid leukemia. Cancer Res; 78(1); 75-87. ©2017 AACR.
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Affiliation(s)
| | - Nicola Morrice
- Institute of Medical Sciences, University of Aberdeen, United Kingdom
| | - Martina Pesaresi
- Institute of Medical Sciences, University of Aberdeen, United Kingdom
| | - Dawn Thompson
- Institute of Medical Sciences, University of Aberdeen, United Kingdom
| | - Mark A Vickers
- Institute of Medical Sciences, University of Aberdeen, United Kingdom
| | - Graeme I Murray
- Institute of Medical Sciences, University of Aberdeen, United Kingdom
| | - Nimesh Mody
- Institute of Medical Sciences, University of Aberdeen, United Kingdom
| | - Benjamin G Neel
- Laura and Isaac Perlmutter Cancer Center, New York University Langone Medical Center, New York University, New York, New York
| | - Kendra K Bence
- Department of Biomedical Sciences, University of Pennsylvania School of Veterinary Medicine, Philadelphia
| | - Heather M Wilson
- Institute of Medical Sciences, University of Aberdeen, United Kingdom.
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21
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Almquist LD, Likes CE, Stone B, Brown KR, Savaris R, Forstein DA, Miller PB, Lessey BA. Endometrial BCL6 testing for the prediction of in vitro fertilization outcomes: a cohort study. Fertil Steril 2017; 108:1063-1069. [PMID: 29126613 PMCID: PMC5726554 DOI: 10.1016/j.fertnstert.2017.09.017] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 08/25/2017] [Accepted: 09/14/2017] [Indexed: 01/23/2023]
Abstract
OBJECTIVE To evaluate endometrial BCL6 expression as a prognostic biomarker for IVF outcome in women with unexplained infertility (UI) before ET. DESIGN Prospective cohort study. SETTING University-associated infertility clinic. PATIENT(S) Women with UI for >1 year. INTERVENTION(S) We studied women with UI who underwent testing for endometrial BCL6, in an LH-timed midluteal phase biopsy and completed an IVF cycle and ET. MAIN OUTCOME MEASURE(S) Clinical pregnancy rate (PR) and live birth rate per transfer was compared for women positive or negative for BCL6 expression. An abnormal BCL6 result was defined by an histologic score (>1.4). RESULT(S) Women with normal and abnormal BCL6 and those who conceived or not had similar characteristics. Women with low levels of BCL6 expression had a significantly higher clinical PR (11/17; 64.7%; 95% confidence interval [CI] 41.3-82.6) compared with women with abnormal (high) BCL6 expression (9/52; 17.3%; 95% CI 9.3-30.8). These results yield a relative risk of 0.267 (95% CI 0.13-0.53; P=.0004) for those with normal BCL6 expression, an absolute benefit of 47.4% (95% CI 22.5-72.0). Live birth rate was also significantly higher in women with low BCL6 expression (10/17; 58.8%; 95% CI 36.0-78.4) compared with women with abnormal BCL6 expression (6/52; 11.5%; 95% CI 5.4-23.0). The relative risk was 0.19 (95% CI 0.08-0.45; P=.0002), yielding an absolute benefit of 47.3% (95% CI 21.8-67.8). CONCLUSION(S) Aberrant BCL6 expression (histologic score, >1.4) was strongly associated with poor reproductive outcomes in IVF cycles in women with UI.
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Affiliation(s)
- Laura D Almquist
- Department of Obstetrics and Gynecology, Greenville Health System, Greenville, South Carolina
| | - Creighton E Likes
- Department of Obstetrics and Gynecology, Greenville Health System, Greenville, South Carolina
| | - Benjamin Stone
- Department of Biology, Bowdoin College, Brunswick, Maine
| | - Kaitlin R Brown
- Obstetrics and Gynecology, University of South Carolina SOM-Greenville, Greenville, South Carolina
| | - Ricardo Savaris
- Departamento de Ginecologia e Obstetrícia, Universidade Federal do Rio Grande do Sul, Rio Grande do Sul, Brazil
| | - David A Forstein
- Department of Obstetrics and Gynecology, Greenville Health System, Greenville, South Carolina
| | - Paul B Miller
- Department of Obstetrics and Gynecology, Greenville Health System, Greenville, South Carolina
| | - Bruce A Lessey
- Department of Obstetrics and Gynecology, Greenville Health System, Greenville, South Carolina.
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22
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O'Brien W, Fissel BM, Maeda Y, Yan J, Ge X, Gravallese EM, Aliprantis AO, Charles JF. RANK-Independent Osteoclast Formation and Bone Erosion in Inflammatory Arthritis. Arthritis Rheumatol 2017; 68:2889-2900. [PMID: 27563728 DOI: 10.1002/art.39837] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Accepted: 08/02/2016] [Indexed: 01/20/2023]
Abstract
OBJECTIVE Proinflammatory molecules promote osteoclast-mediated bone erosion by up-regulating local RANKL production. However, recent evidence suggests that combinations of cytokines, such as tumor necrosis factor (TNF) plus interleukin-6 (IL-6), induce RANKL-independent osteoclastogenesis. The purpose of this study was to better understand TNF/IL-6-induced osteoclast formation and to determine whether RANK is absolutely required for osteoclastogenesis and bone erosion in murine inflammatory arthritis. METHODS Myeloid precursors from wild-type (WT) mice or mice with either germline or conditional deletion of Rank, Nfatc1, Dap12, or Fcrg were treated with either RANKL or TNF plus IL-6. Osteoprotegerin, anti-IL-6 receptor (anti-IL-6R), and hydroxyurea were used to block RANKL, the IL-6R, and cell proliferation, respectively. Clinical scoring, histologic assessment, micro-computed tomography, and quantitative polymerase chain reaction (qPCR) were used to evaluate K/BxN serum-transfer arthritis in WT and RANK-deleted mice. Loss of Rank was verified by qPCR and by osteoclast cultures. RESULTS TNF/IL-6 generated osteoclasts in vitro that resorbed mineralized tissue through a pathway dependent on IL-6R, NFATc1, DNAX-activation protein 12, and cell proliferation, but independent of RANKL or RANK. Bone erosion and osteoclast formation were reduced, but not absent, in arthritic mice with inducible deficiency of RANK. TNF/IL-6, but not RANKL, induced osteoclast formation in bone marrow and synovial cultures from animals deficient in Rank. Multiple IL-6 family members (IL-6, leukemia inhibitory factor, oncostatin M) were up-regulated in the synovium of arthritic mice. CONCLUSION The persistence of bone erosion and synovial osteoclasts in Rank-deficient mice, and the ability of TNF/IL-6 to induce osteoclastogenesis, suggest that more than one cytokine pathway exists to generate these bone-resorbing cells in inflamed joints.
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Affiliation(s)
- William O'Brien
- Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | - Brian M Fissel
- Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | - Yukiko Maeda
- University of Massachusetts Medical School, Worcester
| | - Jing Yan
- Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | - Xianpeng Ge
- Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | | | | | - Julia F Charles
- Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
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23
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Abstract
ZBTB transcription factors orchestrate gene transcription during tissue development. However, their roles in glioblastoma (GBM) remain unexplored. Here, through a functional screening of ZBTB genes, we identify that BCL6 is required for GBM cell viability and that BCL6 overexpression is associated with worse prognosis. In a somatic transgenic mouse model, depletion of Bcl6 inhibits the progression of KrasG12V-driven high-grade glioma. Transcriptome analysis demonstrates the involvement of BCL6 in tumor protein p53 (TP53), erythroblastic leukemia viral oncogene homolog (ErbB), and MAPK signaling pathways. Indeed, BCL6 represses the expression of wild-type p53 and its target genes in GBM cells. Knockdown of BCL6 augments the activation of TP53 pathway in response to radiation. Importantly, we discover that receptor tyrosine kinase AXL is a transcriptional target of BCL6 in GBM and mediates partially the regulatory effects of BCL6 on both MEK-ERK (mitogen-activated protein/extracellular signal-regulated kinase kinase-extracellular signal-regulated kinase) and S6K-RPS6 (ribosomal protein S6 kinase-ribosomal protein S6) axes. Similar to BCL6 silencing, depletion of AXL profoundly attenuates GBM proliferation both in vitro and in vivo. Moreover, targeted inhibition of BCL6/nuclear receptor corepressor 1 (NCoR) complex by peptidomimetic inhibitor not only significantly decreases AXL expression and the activity of MEK-ERK and S6K-RPS6 cascades but also displays a potent antiproliferative effect against GBM cells. Together, these findings uncover a glioma-promoting role of BCL6 and provide the rationale of targeting BCL6 as a potential therapeutic approach.
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24
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Beck D, Zobel J, Barber R, Evans S, Lezina L, Allchin RL, Blades M, Elliott R, Lord CJ, Ashworth A, Porter ACG, Wagner SD. Synthetic Lethal Screen Demonstrates That a JAK2 Inhibitor Suppresses a BCL6-dependent IL10RA/JAK2/STAT3 Pathway in High Grade B-cell Lymphoma. J Biol Chem 2016; 291:16686-98. [PMID: 27268052 PMCID: PMC4974382 DOI: 10.1074/jbc.m116.736868] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Revised: 06/05/2016] [Indexed: 11/06/2022] Open
Abstract
We demonstrate the usefulness of synthetic lethal screening of a conditionally BCL6-deficient Burkitt lymphoma cell line, DG75-AB7, with a library of small molecules to determine survival pathways suppressed by BCL6 and suggest mechanism-based treatments for lymphoma. Lestaurtinib, a JAK2 inhibitor and one of the hits from the screen, repressed survival of BCL6-deficient cells in vitro and reduced growth and proliferation of xenografts in vivo BCL6 deficiency in DG75-AB7 induced JAK2 mRNA and protein expression and STAT3 phosphorylation. Surface IL10RA was elevated by BCL6 deficiency, and blockade of IL10RA repressed STAT3 phosphorylation. Therefore, we define an IL10RA/JAK2/STAT3 pathway each component of which is repressed by BCL6. We also show for the first time that JAK2 is a direct BCL6 target gene; BCL6 bound to the JAK2 promoter in vitro and was enriched by ChIP-seq. The place of JAK2 inhibitors in the treatment of diffuse large B-cell lymphoma has not been defined; we suggest that JAK2 inhibitors might be most effective in poor prognosis ABC-DLBCL, which shows higher levels of IL10RA, JAK2, and STAT3 but lower levels of BCL6 than GC-DLBCL and might be usefully combined with novel approaches such as inhibition of IL10RA.
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Affiliation(s)
- Daniel Beck
- From the Department of Cancer Studies, Ernest and Helen Scott Haematology Research Institute, and
| | - Jenny Zobel
- Department of Haematology, Imperial College London, Hammersmith Campus, Du Cane Road, London W12 0NN
| | - Ruth Barber
- From the Department of Cancer Studies, Ernest and Helen Scott Haematology Research Institute, and Leicester Diagnostic and Drug Development (LD3) Centre, University of Leicester, Lancaster Road, Leicester LE1 7HB
| | - Sian Evans
- From the Department of Cancer Studies, Ernest and Helen Scott Haematology Research Institute, and
| | - Larissa Lezina
- From the Department of Cancer Studies, Ernest and Helen Scott Haematology Research Institute, and
| | - Rebecca L Allchin
- From the Department of Cancer Studies, Ernest and Helen Scott Haematology Research Institute, and
| | - Matthew Blades
- Bioinformatics and Biostatistics Analysis Support Hub (B/BASH), University of Leicester, Lancaster Road, Leicester LE1 9HN, and
| | - Richard Elliott
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, 237 Fulham Road, London SW3 6JB, United Kingdom
| | - Christopher J Lord
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, 237 Fulham Road, London SW3 6JB, United Kingdom
| | - Alan Ashworth
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, 237 Fulham Road, London SW3 6JB, United Kingdom
| | - Andrew C G Porter
- Department of Haematology, Imperial College London, Hammersmith Campus, Du Cane Road, London W12 0NN
| | - Simon D Wagner
- From the Department of Cancer Studies, Ernest and Helen Scott Haematology Research Institute, and
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25
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Maeda T. Regulation of hematopoietic development by ZBTB transcription factors. Int J Hematol 2016; 104:310-23. [PMID: 27250345 DOI: 10.1007/s12185-016-2035-x] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 05/26/2016] [Accepted: 05/26/2016] [Indexed: 12/19/2022]
Abstract
Hematopoietic development is governed by the coordinated expression of lineage- and differentiation stage-specific genes. Transcription factors play major roles in this process and their perturbation may underlie hematologic and immunologic disorders. Nearly 1900 transcription factors are encoded in the human genome: of these, 49 BTB (for broad-complex, tram-track and bric à brac)-zinc finger transcription factors referred to as ZBTB or POK proteins have been identified. ZBTB proteins, including BCL6, PLZF, ThPOK and LRF, exhibit a broad spectrum of functions in normal and malignant hematopoiesis. This review summarizes developmental and molecular functions of ZBTB proteins relevant to hematology.
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Affiliation(s)
- Takahiro Maeda
- Division of Hematology, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, One Blackfan Circle, Boston, MA, 02115, USA.
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26
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Athanasiadou S, Russell KM, Kaiser P, Kanellos T, Burgess STG, Mitchell M, Clutton E, Naylor SW, Low CJ, Hutchings MR, Sparks N. Genome wide transcriptomic analysis identifies pathways affected by the infusion of Clostridium perfringens culture supernatant in the duodenum of broilers in situ. J Anim Sci 2016; 93:3152-63. [PMID: 26115301 DOI: 10.2527/jas.2014-8597] [Citation(s) in RCA: 4] [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
Clostridium perfringens type A is the main etiological factor for necrotic enteritis, a multifactorial enteric disease that penalizes performance, health, and welfare of poultry. Lack of knowledge of host responses and disease pathogenesis is slowing down progress on developing therapies for disease control. A combined genomewide and targeted gene approach was used to investigate pathways and biological functions affected by the infusion of C. perfringens culture supernatant in the duodenum of broilers in 2 experiments. An in situ isolated loop of duodenum was prepared in anesthetized broilers of 3 wk of age (Exp. 1) and was infused either with crude C. perfringens culture supernatant (n = 7; treated), positive for necrotic enteritis B-like toxin (NetB) as determined by a cytotoxicity assay, or with a control preparation (n = 6; control). Birds were maintained alive for 1 h and then euthanized for tissue recovery. The use of the Affymetrix chicken genome array on RNA samples from loop tissue showed top biological functions affected by culture supernatant infusion included cell morphology, immune cell trafficking, and cell death; pathways affected included death receptor signaling, inflammatory response, and nuclear factor (NF)-κB signaling. In a second in situ study (Exp. 2), broilers were maintained alive for 4 h to monitor temporal expression patterns of targeted genes. Duodenal tissue was removed at 0.5, 1, 2, and 4 h post-infusion with culture supernatant (n = 9) or a control preparation (n = 5) for histology and gene expression analysis. Genes encoding proinflammatory cytokines, such as interferon γ (IFNγ), cell trafficking, such as neuroblastoma 1 (NBL1) and B cell CLL/Lymphoma 6 (BCL6), and cell death, such as Fas cell surface death receptor (FAS) and GTPase IMAP family member 8 (GIMAP8), were differentially expressed in the duodenum of treated and control broilers (P < 0.05). We have demonstrated that C. perfringens culture supernatant (NetB positive) infusion resulted in histological and gene expression changes consistent with necrotic enteritis in the duodenum of broilers. In the absence of live bacteria, crude culture supernatant resulted in early immunomodulation, inflammation, and cell death in the duodenum. The pathways identified here can be targeted for the development of new drugs, vaccines, and novel therapies for necrotic enteritis in broilers.
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27
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Busch R, Murti K, Liu J, Patra AK, Muhammad K, Knobeloch KP, Lichtinger M, Bonifer C, Wörtge S, Waisman A, Reifenberg K, Ellenrieder V, Serfling E, Avots A. NFATc1 releases BCL6-dependent repression of CCR2 agonist expression in peritoneal macrophages from Saccharomyces cerevisiae infected mice. Eur J Immunol 2016; 46:634-46. [PMID: 26631626 DOI: 10.1002/eji.201545925] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Revised: 11/04/2015] [Accepted: 11/25/2015] [Indexed: 12/31/2022]
Abstract
The link between the extensive usage of calcineurin (CN) inhibitors cyclosporin A and tacrolimus (FK506) in transplantation medicine and the increasing rate of opportunistic infections within this segment of patients is alarming. Currently, how peritoneal infections are favored by these drugs, which impair the activity of several signaling pathways including the Ca(++) /CN/NFAT, Ca(++) /CN/cofilin, Ca(++) /CN/BAD, and NF-κB networks, is unknown. Here, we show that Saccharomyces cerevisiae infection of peritoneal resident macrophages triggers the transient nuclear translocation of NFATc1β isoforms, resulting in a coordinated, CN-dependent induction of the Ccl2, Ccl7, and Ccl12 genes, all encoding CCR2 agonists. CN inhibitors block the CCR2-dependent recruitment of inflammatory monocytes (IM) to the peritoneal cavities of S. cerevisiae infected mice. In myeloid cells, NFATc1/β proteins represent the most prominent NFATc1 isoforms. NFATc1/β ablation leads to a decrease of CCR2 chemokines, impaired mobilization of IMs, and delayed clearance of infection. We show that, upon binding to a composite NFAT/BCL6 regulatory element within the Ccl2 promoter, NFATc1/β proteins release the BCL6-dependent repression of Ccl2 gene in macrophages. These findings suggest a novel CN-dependent cross-talk between NFAT and BCL6 transcription factors, which may affect the outcome of opportunistic fungal infections in immunocompromised patients.
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Affiliation(s)
- Rhoda Busch
- Department of Molecular Pathology, Institute of Pathology, Julius Maximilians University of Wuerzburg, Wuerzburg, Germany.,Comprehensive Cancer Center Mainfranken, Julius Maximilians University of Wuerzburg, Wuerzburg, Germany
| | - Krisna Murti
- Department of Molecular Pathology, Institute of Pathology, Julius Maximilians University of Wuerzburg, Wuerzburg, Germany.,Comprehensive Cancer Center Mainfranken, Julius Maximilians University of Wuerzburg, Wuerzburg, Germany
| | - Jiming Liu
- Department of Molecular Pathology, Institute of Pathology, Julius Maximilians University of Wuerzburg, Wuerzburg, Germany.,Comprehensive Cancer Center Mainfranken, Julius Maximilians University of Wuerzburg, Wuerzburg, Germany
| | - Amiya K Patra
- Department of Molecular Pathology, Institute of Pathology, Julius Maximilians University of Wuerzburg, Wuerzburg, Germany.,Comprehensive Cancer Center Mainfranken, Julius Maximilians University of Wuerzburg, Wuerzburg, Germany
| | - Khalid Muhammad
- Department of Molecular Pathology, Institute of Pathology, Julius Maximilians University of Wuerzburg, Wuerzburg, Germany.,Comprehensive Cancer Center Mainfranken, Julius Maximilians University of Wuerzburg, Wuerzburg, Germany
| | | | - Monika Lichtinger
- School of Cancer Sciences, Institute of Biomedical Research, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - Constanze Bonifer
- School of Cancer Sciences, Institute of Biomedical Research, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - Simone Wörtge
- Institute of Molecular Medicine, University Medical Center of the Johannes Gutenberg University of Mainz, Mainz, Germany
| | - Ari Waisman
- Institute of Molecular Medicine, University Medical Center of the Johannes Gutenberg University of Mainz, Mainz, Germany
| | | | - Volker Ellenrieder
- Clinic of Gastroenterology and Gastrointestinal Oncology, University of Goettingen, Goettingen, Germany
| | - Edgar Serfling
- Department of Molecular Pathology, Institute of Pathology, Julius Maximilians University of Wuerzburg, Wuerzburg, Germany.,Comprehensive Cancer Center Mainfranken, Julius Maximilians University of Wuerzburg, Wuerzburg, Germany
| | - Andris Avots
- Department of Molecular Pathology, Institute of Pathology, Julius Maximilians University of Wuerzburg, Wuerzburg, Germany.,Comprehensive Cancer Center Mainfranken, Julius Maximilians University of Wuerzburg, Wuerzburg, Germany
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28
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Zhang R, Wang Y, Li R, Chen G. Transcriptional Factors Mediating Retinoic Acid Signals in the Control of Energy Metabolism. Int J Mol Sci 2015; 16:14210-44. [PMID: 26110391 PMCID: PMC4490549 DOI: 10.3390/ijms160614210] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 06/10/2015] [Accepted: 06/11/2015] [Indexed: 02/07/2023] Open
Abstract
Retinoic acid (RA), an active metabolite of vitamin A (VA), is important for many physiological processes including energy metabolism. This is mainly achieved through RA-regulated gene expression in metabolically active cells. RA regulates gene expression mainly through the activation of two subfamilies in the nuclear receptor superfamily, retinoic acid receptors (RARs) and retinoid X receptors (RXRs). RAR/RXR heterodimers or RXR/RXR homodimers bind to RA response element in the promoters of RA target genes and regulate their expressions upon ligand binding. The development of metabolic diseases such as obesity and type 2 diabetes is often associated with profound changes in the expressions of genes involved in glucose and lipid metabolism in metabolically active cells. RA regulates some of these gene expressions. Recently, in vivo and in vitro studies have demonstrated that status and metabolism of VA regulate macronutrient metabolism. Some studies have shown that, in addition to RARs and RXRs, hepatocyte nuclear factor 4α, chicken ovalbumin upstream promoter-transcription factor II, and peroxisome proliferator activated receptor β/δ may function as transcriptional factors mediating RA response. Herein, we summarize current progresses regarding the VA metabolism and the role of nuclear receptors in mediating RA signals, with an emphasis on their implication in energy metabolism.
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Affiliation(s)
- Rui Zhang
- State Food and Drug Administration Hubei Center for Medical Equipment Quality Supervision and Testing, 666 High-Tech Avenue, Wuhan 430000, China.
| | - Yueqiao Wang
- Department of Nutrition and Food Hygiene, Wuhan University, 185 East Lake Road, Wuhan 430071, China.
| | - Rui Li
- Department of Nutrition and Food Hygiene, Wuhan University, 185 East Lake Road, Wuhan 430071, China.
| | - Guoxun Chen
- Department of Nutrition, University of Tennessee at Knoxville, 1215 West Cumberland Avenue, Knoxville, TN 37996, USA.
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29
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Park YS, Kang JW, Lee DH, Kim MS, Bak Y, Yang Y, Lee HG, Hong J, Yoon DY. Interleukin-32α downregulates the activity of the B-cell CLL/lymphoma 6 protein by inhibiting protein kinase Cε-dependent SUMO-2 modification. Oncotarget 2014; 5:8765-77. [PMID: 25245533 PMCID: PMC4226720 DOI: 10.18632/oncotarget.2364] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Accepted: 08/14/2014] [Indexed: 11/25/2022] Open
Abstract
A proinflammatory cytokine IL-32 acts as an intracellular mediator. IL-32α interacts with many intracellular molecules, but there are no reports of interaction with a transcriptional repressor BCL6. In this study, we showed that PMA induces an interaction between IL-32α, PKCε, and BCL6, forming a trimer. To identify the mechanism of the interaction, we treated cells with various inhibitors. In HEK293 and THP-1 cell lines, treatment with a pan-PKC inhibitor, PKCε inhibitor, and PKCδ inhibitor decreased BCL6 and IL-32α protein expression. MAPK inhibitors and classical PKC inhibitor did not decrease PMA-induced BCL6 and IL-32α protein expression. Further, the pan-PKC inhibitor and PKCε inhibitor disrupted PMA-induced interaction between IL-32α and BCL6. These data demonstrate that the intracellular interaction between IL-32α and BCL6 is induced by PMA-activated PKCε. PMA induces post-translational modification of BCL6 by conjugation to SUMO-2, while IL-32α inhibits. PKCε inhibition eliminated PMA-induced SUMOylation of BCL6. Inhibition of BCL6 SUMOylation by IL-32α affected the cellular function and activity of the transcriptional repressor BCL6 in THP-1 cells. Thus, we showed that IL-32α is a negative regulator of the transcriptional repressor BCL6. IL-32α inhibits BCL6 SUMOylation by activating PKCε, resulting in the modulation of BCL6 target genes and cellular functions of BCL6.
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Affiliation(s)
- Yun Sun Park
- Department of Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University, Seoul, South Korea
| | - Jeong-Woo Kang
- Department of Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University, Seoul, South Korea
| | - Dong Hun Lee
- Department of Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University, Seoul, South Korea
| | - Man Sub Kim
- Department of Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University, Seoul, South Korea
| | - Yesol Bak
- Department of Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University, Seoul, South Korea
| | - Young Yang
- Research Center for Women's Disease, Department of Life Systems, Sookmyung Women's University, Seoul, South Korea
| | - Hee Gu Lee
- Medical Genomics Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, South Korea
| | - JinTae Hong
- College of Pharmacy and Medical Research Center, Chungbuk National University, Cheongju, South Korea
| | - Do-Young Yoon
- Department of Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University, Seoul, South Korea
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Ohtsuji M, Lin Q, Nishikawa K, Ohtsuji N, Okazaki H, Tsurui H, Amano H, Shirai T, Nishimoto N, Nishimura H, Hirose S. IL-6 signal blockade ameliorates the enhanced osteoclastogenesis and the associated joint destruction in a novel FcγRIIB-deficient rheumatoid arthritis mouse model. Mod Rheumatol 2014; 25:270-7. [PMID: 25159156 DOI: 10.3109/14397595.2014.950035] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE We earlier found that TNFα but not interleukin (IL)-17 is indispensable in the pathogenesis of spontaneously occurring rheumatoid arthritis (RA)-like disease in our newly established FcγRIIB-deficient C57BL/6 (B6) mouse model, designated KO1. Here, we examined the role of IL-6 in the pathogenesis of RA features in KO1, with particular reference to cartilage and bone destruction in arthritic joints. METHODS To evaluate the preventive effect of MR16-1, a rat anti-mouse IL-6 receptor (IL-6R) mAb, 4-month-old preclinical KO1 mice were divided into three groups: the first treated with MR16-1 for 6 months, the second treated with normal rat IgG, as a control, and the third left untreated. The incidence and severity of arthritis, immunological abnormalities, and transcription levels of receptor activator of NF-κB ligand (RANKL), osteoprotegerin (OPG), and inflammatory cytokines/chemokines in ankle joint tissues were compared among the three groups. The therapeutic effect of MR16-1 was examined by treating 7-month-old KO1 mice in the early stages of arthritis for 2 months. RESULTS Compared with the findings in the KO1 mice left untreated or treated with normal rat IgG, the development of arthritis was markedly suppressed in mice with MR16-1 treatment started from preclinical stages. The suppression was associated with the decrease in production of autoantibodies, rheumatoid factors (RF), and anti-cyclic citrullinated peptide (CCP). Histologically, marked synovitis, pannus formation, and cartilage and bone destruction associated with the increase in tartrate-resistant acid phosphatase (TRAP)-positive osteoclast generation were evident in the two control groups; however, these findings were virtually absent in MR16-1-treated mice. Real-time PCR analysis revealed that the up-regulated expression levels of MCP-1, IL-6, and TNFα, and the aberrantly high RANKL/OPG expression ratio in synovial joint tissues from the two control groups of mice with overt arthritis were significantly suppressed in MR16-1-treated mice. In mice with therapeutic MR16-1 treatment, there was no progression in arthritis score and the RANKL/OPG ratio in joint tissues was significantly suppressed. CONCLUSIONS Administration of an anti-IL-6R mAb ameliorated spontaneously occurring RA-like disease features, indicating that IL-6, as well as TNFα, plays a pivotal role in the pathogenesis of RA in KO1 mice. Current studies showed that, in addition to the role in enhancing autoantibody production, IL-6 promotes synovial tissue inflammation and osteoclastogenesis, leading to the severe synovitis with pannus formation and the progressive cartilage and bone destruction in multiple joints.
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Affiliation(s)
- Mareki Ohtsuji
- Department of Biomedical Engineering, Toin Human Science and Technology Center, Toin University of Yokohama , Yokohama , Japan
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31
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Rüder C, Haase T, Krost A, Langwieser N, Peter J, Kamann S, Zohlnhöfer D. Combinatorial G-CSF/AMD3100 treatment in cardiac repair after myocardial infarction. PLoS One 2014; 9:e104644. [PMID: 25121738 PMCID: PMC4133256 DOI: 10.1371/journal.pone.0104644] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2013] [Accepted: 07/15/2014] [Indexed: 11/18/2022] Open
Abstract
AIMS Several studies suggest that circulating bone marrow derived stem cells promote the regeneration of ischemic tissues. For hematopoietic stem cell transplantation combinatorial granulocyte-colony stimulating factor (G-CSF)/Plerixafor (AMD3100) administration was shown to enhance mobilization of bone marrow derived stem cells compared to G-CSF monotherapy. Here we tested the hypothesis whether combinatorial G-CSF/AMD3100 therapy has beneficial effects in cardiac recovery in a mouse model of myocardial infarction. METHODS We analyzed the effect of single G-CSF (250 µg/kg/day) and combinatorial G-CSF/AMD3100 (100 µg/kg/day) treatment on cardiac morphology, vascularization, and hemodynamics 28 days after permanent ligation of the left anterior descending artery (LAD). G-CSF treatment started directly after induction of myocardial infarction (MI) for 3 consecutive days followed by a single AMD3100 application on day three after MI in the G-CSF/AMD3100 group. Cell mobilization was assessed by flow cytometry of blood samples drawn from tail vein on day 0, 7, and 14. RESULTS Peripheral blood analysis 7 days after MI showed enhanced mobilization of white blood cells (WBC) and endothelial progenitor cells (EPC) upon G-CSF and combinatorial G-CSF/AMD3100 treatment. However, single or combinatorial treatment showed no improvement in survival, left ventricular function, and infarction size compared to the saline treated control group 28 days after MI. Furthermore, no differences in histology and vascularization of infarcted hearts could be observed. CONCLUSION Although the implemented treatment regimen caused no adverse effects, our data show that combinatorial G-CSF/AMD therapy does not promote myocardial regeneration after permanent LAD occlusion.
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Affiliation(s)
- Constantin Rüder
- Berlin Brandenburg Center for Regenerative Therapies (BCRT), Berlin, Germany
- Department of Cardiology, Campus Virchow Klinikum, Charité Berlin, Germany
| | - Tobias Haase
- Berlin Brandenburg Center for Regenerative Therapies (BCRT), Berlin, Germany
- Department of Cardiology, Campus Virchow Klinikum, Charité Berlin, Germany
| | - Annalena Krost
- Berlin Brandenburg Center for Regenerative Therapies (BCRT), Berlin, Germany
| | - Nicole Langwieser
- Berlin Brandenburg Center for Regenerative Therapies (BCRT), Berlin, Germany
| | - Jan Peter
- Berlin Brandenburg Center for Regenerative Therapies (BCRT), Berlin, Germany
| | - Stefanie Kamann
- Berlin Brandenburg Center for Regenerative Therapies (BCRT), Berlin, Germany
| | - Dietlind Zohlnhöfer
- Berlin Brandenburg Center for Regenerative Therapies (BCRT), Berlin, Germany
- Department of Cardiology, Campus Virchow Klinikum, Charité Berlin, Germany
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32
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Bassil R, Orent W, Olah M, Kurdi AT, Frangieh M, Buttrick T, Khoury SJ, Elyaman W. BCL6 controls Th9 cell development by repressing Il9 transcription. THE JOURNAL OF IMMUNOLOGY 2014; 193:198-207. [PMID: 24879792 DOI: 10.4049/jimmunol.1303184] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The transcriptional repressor B cell lymphoma 6 (BCL6) is required for the development of Th follicular cells, and it has been shown to suppress Th2 cell differentiation. We demonstrate that BCL6 is a key regulator of Th9 cell development. BCL6 expression is transiently downregulated in polarized Th9 cells, and forced expression of BCL6 in Th9 cells impairs Th9 cell differentiation. In contrast, BCL6 knockdown upregulated IL-9 production in Th9 cells. The function of BCL6 in Th9 cells is under the control of IL-2/JAK3/STAT5 signaling pathway. Using chromatin immunoprecipitation, we show that, in Th9 cells, BCL6 and STAT5 bind to adjacent motifs in the Il9 promoter. Furthermore, we found that STAT5 binding was associated with the abundance of a permissive histone mark at the Il9 promoter, whereas under conditions in which BCL6 binding was predominant, a repressive histone mark was prevalent. The effects of STAT5 and BCL6 on IL-9 transcription were further demonstrated using an IL-9 luciferase reporter assay in which BCL6 repressed STAT5-mediated Il9 transactivation. In experimental autoimmune encephalomyelitis, forced expression of BCL6 in myelin oligodendrocyte glycoprotein35-55-specific Th9 cells resulted in decreased IL-9 production and induction of IFN-γ, causing an exacerbation of the clinical disease. Our findings demonstrate a novel role of BCL6 in the regulation of Th9 cell development and their encephalitogenicity.
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Affiliation(s)
- Ribal Bassil
- Center for Neurologic Diseases, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115; and
| | - William Orent
- Center for Neurologic Diseases, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115; and
| | - Marta Olah
- Center for Neurologic Diseases, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115; and
| | - Ahmed T Kurdi
- Center for Neurologic Diseases, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115; and
| | - Michael Frangieh
- Center for Neurologic Diseases, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115; and
| | - Thomas Buttrick
- Center for Neurologic Diseases, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115; and
| | - Samia J Khoury
- Center for Neurologic Diseases, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115; and Abu Haidar Neuroscience Institute, American University of Beirut, Beirut 1107-2020, Lebanon
| | - Wassim Elyaman
- Center for Neurologic Diseases, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115; and
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Zhang X, Weissman SM, Newburger PE. Long intergenic non-coding RNA HOTAIRM1 regulates cell cycle progression during myeloid maturation in NB4 human promyelocytic leukemia cells. RNA Biol 2014; 11:777-87. [PMID: 24824789 DOI: 10.4161/rna.28828] [Citation(s) in RCA: 132] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
HOTAIRM1 is a long intergenic non-coding RNA encoded in the human HOXA gene cluster, with gene expression highly specific for maturing myeloid cells. Knockdown of HOTAIRM1 in the NB4 acute promyelocytic leukemia cell line retarded all-trans retinoid acid (ATRA)-induced granulocytic differentiation, resulting in a significantly larger population of immature and proliferating cells that maintained cell cycle progression from G1 to S phases. Correspondingly, HOTAIRM1 knockdown resulted in retained expression of many otherwise ATRA-suppressed cell cycle and DNA replication genes, and abated ATRA induction of cell surface leukocyte activation, defense response, and other maturation-related genes. Resistance to ATRA-induced cell cycle arrest at the G1/S phase transition in knockdown cells was accompanied by retained expression of ITGA4 (CD49d) and decreased induction of ITGAX (CD11c). The coupling of cell cycle progression with temporal dynamics in the expression patterns of these integrin genes suggests a regulated switch to control the transit from the proliferative phase to granulocytic maturation. Furthermore, ITGAX was among a small number of genes showing perturbation in transcript levels upon HOTAIRM1 knockdown even without ATRA treatment, suggesting a direct pathway of regulation. These results indicate that HOTAIRM1 provides a regulatory link in myeloid maturation by modulating integrin-controlled cell cycle progression at the gene expression level.
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Affiliation(s)
- Xueqing Zhang
- Department of Pediatrics; University of Massachusetts Medical School; Worcester, MA USA
| | | | - Peter E Newburger
- Department of Pediatrics; University of Massachusetts Medical School; Worcester, MA USA; Department of Cancer Biology; University of Massachusetts Medical School; Worcester, MA USA
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34
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Mackenzie LS, Lione L. Harnessing the benefits of PPARβ/δ agonists. Life Sci 2013; 93:963-7. [DOI: 10.1016/j.lfs.2013.10.022] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2013] [Revised: 10/04/2013] [Accepted: 10/21/2013] [Indexed: 01/03/2023]
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35
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Lineage-specific functions of Bcl-6 in immunity and inflammation are mediated by distinct biochemical mechanisms. Nat Immunol 2013; 14:380-8. [PMID: 23455674 PMCID: PMC3604075 DOI: 10.1038/ni.2543] [Citation(s) in RCA: 100] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Accepted: 01/10/2013] [Indexed: 01/08/2023]
Abstract
The transcription factor Bcl-6 orchestrates germinal center (GC) reactions through its actions in B cells and T cells and regulates inflammatory signaling in macrophages. Here we found that genetic replacement with mutated Bcl6 encoding Bcl-6 that cannot bind corepressors to its BTB domain resulted in disruption of the formation of GCs and affinity maturation of immunoglobulins due to a defect in the proliferation and survival of B cells. In contrast, loss of function of the BTB domain had no effect on the differentiation and function of follicular helper T cells or that of other helper T cell subsets. Bcl6-null mice had a lethal inflammatory phenotype, whereas mice with a mutant BTB domain had normal healthy lives with no inflammation. The repression of inflammatory responses by Bcl-6 in macrophages was accordingly independent of the repressor function of the BTB domain. Bcl-6 thus mediates its actions through lineage-specific biochemical functions.
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36
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Abstract
Various molecules participate in different phases of allergic reactions. This means that many genes are encoding molecules related to allergic reactions, such as cytokines, chemokines, and their receptors as effect or molecules. The transcriptional repressor BCL6 has emerged as a multifunctional regulator of lymphocyte differentiation and immune responses. BCL6-deficient (BCL6) mice display T helper type 2 (Th2)-type inflammation, which is caused by abnormality of both lymphoid cells and nonlymphoid cells. Thus, BCL6 apparently contributes to negative regulation of various central molecules such as cytokines, in particular Th2 cytokines, CC chemokines, and immunoglobulin E in allergic diseases. Therefore, BCL6 may be a molecular target for Th2-type allergic diseases.
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37
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miR-155 targets histone deacetylase 4 (HDAC4) and impairs transcriptional activity of B-cell lymphoma 6 (BCL6) in the Eμ-miR-155 transgenic mouse model. Proc Natl Acad Sci U S A 2012; 109:20047-52. [PMID: 23169640 DOI: 10.1073/pnas.1213764109] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Multiple studies have established that microRNAs (miRNAs) are involved in the initiation and progression of cancer. Notably, miR-155 is one of the most overexpressed miRNAs in several solid and hematological malignancies. Ectopic miR-155 expression in mice B cells (Eμ-miR-155 transgenic mice) has been shown to induce pre-B-cell proliferation followed by high-grade lymphoma/leukemia. Loss of miR-155 in mice resulted in impaired immunity due to defective T-cell-mediated immune response. Here we provide a mechanistic insight into miR-155-induced leukemogenesis in the Eμ-miR-155 mouse model through genome-wide transcriptome analysis of naïve B cells and target studies. We found that a key transcriptional repressor and proto-oncogene, Bcl6 is significantly down-regulated in Eμ-miR-155 mice. The reduction of Bcl6 subsequently leads to de-repression of some of the known Bcl6 targets like inhibitor of differentiation (Id2), interleukin-6 (IL6), cMyc, Cyclin D1, and Mip1α/ccl3, all of which promote cell survival and proliferation. We show that Bcl6 is indirectly regulated by miR-155 through Mxd1/Mad1 up-regulation. Interestingly, we found that miR-155 directly targets HDAC4, a corepressor partner of BCL6. Furthermore, ectopic expression of HDAC4 in human-activated B-cell-type diffuse large B-cell lymphoma (DLBCL) cells results in reduced miR-155-induced proliferation, clonogenic potential, and increased apoptosis. Meta-analysis of the diffuse large B-cell lymphoma patient microarray data showed that miR-155 expression is inversely correlated with Bcl6 and Hdac4. Hence this study provides a better understanding of how miR-155 causes disruption of the BCL6 transcriptional machinery that leads to up-regulation of the survival and proliferation genes in miR-155-induced leukemias.
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38
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Altieri P, Spallarossa P, Barisione C, Garibaldi S, Garuti A, Fabbi P, Ghigliotti G, Brunelli C. Inhibition of doxorubicin-induced senescence by PPARδ activation agonists in cardiac muscle cells: cooperation between PPARδ and Bcl6. PLoS One 2012; 7:e46126. [PMID: 23049957 PMCID: PMC3458009 DOI: 10.1371/journal.pone.0046126] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Accepted: 08/28/2012] [Indexed: 01/29/2023] Open
Abstract
Senescence and apoptosis are two distinct cellular programs that are activated in response to a variety of stresses. Low or high doses of the same stressor, i.e., the anticancer drug doxorubicin, may either induce apoptosis or senescence, respectively, in cardiac muscle cells. We have demonstrated that PPARδ, a ligand-activated transcriptional factor that controls lipid metabolism, insulin sensitivity and inflammation, is also involved in the doxorubicin-induced senescence program. This occurs through its interference with the transcriptional repressor protein B cell lymphoma-6 (Bcl6). Low doses of doxorubicin increase the expression of PPARδ that sequesters Bcl6, thus preventing it from exerting its anti-senescent effects. We also found that L-165041, a specific PPARδ activator, is highly effective in protecting cardiomyocytes from doxorubicin-induced senescence through a Bcl6 related mechanism. In fact, L-165041 increases Bcl6 expression via p38, JNK and Akt activation, and at the same time it induces the release of Bcl6 from PPARδ, thereby enabling Bcl6 to bind to its target genes. L-165041 also prevented apoptosis induced by higher doses of doxorubicin. However, while experiments performed with siRNA analysis techniques very clearly showed the weight of Bcl6 in the cellular senescence program, no role was found for Bcl6 in the anti-apoptotic effects of L-165041, thus confirming that senescence and apoptosis are two very distinct stress response cellular programs. This study increases our understanding of the molecular mechanism of anthracycline cardiotoxicity and suggests a potential role for PPARδ agonists as cardioprotective agents.
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Affiliation(s)
- Paola Altieri
- Research Centre of Cardiovascular Biology, University of Genova, Genova, Italy.
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39
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He K, Pan X, Zhou HR, Pestka JJ. Modulation of inflammatory gene expression by the ribotoxin deoxynivalenol involves coordinate regulation of the transcriptome and translatome. Toxicol Sci 2012; 131:153-63. [PMID: 22968694 DOI: 10.1093/toxsci/kfs266] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
The trichothecene deoxynivalenol (DON), a common contaminant of cereal-based foods, is a ribotoxic mycotoxin known to activate innate immune cells in vivo and in vitro. Although it is recognized that DON induces transcription and mRNA stabilization of inflammation-associated mRNAs in mononuclear phagocytes, it is not known if this toxin affects translation of selected mRNA species in the cellular pool. To address this question, we employed a focused inflammation/autoimmunity PCR array to compare DON-induced changes in profiles of polysome-associated mRNA transcripts (translatome) to total cellular mRNA transcripts (transcriptome) in the RAW 264.7 murine macrophage model. Exposure to DON at 250 ng/ml (0.84 µM) for 6 h induced robust expression changes in inflammatory response genes including cytokines, cytokine receptors, chemokines, chemokine receptors, and transcription factors, with 73% of the changes being highly comparable within transcriptome and translatome populations. When expression changes of selected representative inflammatory response genes in the polysome and cellular mRNA pools were quantified in a follow-up study by real-time PCR, closely coordinated regulation of the translatome and transcriptome was confirmed; however, modest but significant differences in the relative expression of some genes within the two pools were also detectable. Taken together, DON's capacity to alter translation expression of inflammation-associated genes appears to be driven predominantly by selective transcription and mRNA stabilization that have been reported previously; however, a small subset of these genes appear to be further regulated at the translational level.
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Affiliation(s)
- Kaiyu He
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, Michigan 48824, USA
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40
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Abstract
The BTB-ZF (broad-complex, tramtrack and bric-à-brac--zinc finger) proteins are encoded by at least 49 genes in mouse and man and commonly serve as sequence-specific silencers of gene expression. This review will focus on the known physiological functions of mammalian BTB-ZF proteins, which include essential roles in the development of the immune system. We discuss their function in terminally differentiated lymphocytes and the progenitors that give rise to them, their action in hematopoietic malignancy and roles beyond the immune system.
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Affiliation(s)
- Owen M Siggs
- Department of Genetics, The Scripps Research Institute, La Jolla, CA, USA.
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41
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Ortega MT, Lu N, Chapes SK. Evaluation of in vitro macrophage differentiation during space flight. ADVANCES IN SPACE RESEARCH : THE OFFICIAL JOURNAL OF THE COMMITTEE ON SPACE RESEARCH (COSPAR) 2012; 49:1441-1455. [PMID: 23420085 PMCID: PMC3570223 DOI: 10.1016/j.asr.2012.02.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We differentiated mouse bone marrow cells in the presence of recombinant macrophage colony stimulating (rM-CSF) factor for 14 days during the flight of space shuttle Space Transportation System (STS)-126. We tested the hypothesis that the receptor expression for M-CSF, c-Fms was reduced. We used flow cytometry to assess molecules on cells that were preserved during flight to define the differentiation state of the developing bone marrow macrophages; including CD11b, CD31, CD44, Ly6C, Ly6G, F4/80, Mac2, c-Fos as well as c-Fms. In addition, RNA was preserved during the flight and was used to perform a gene microarray. We found that there were significant differences in the number of macrophages that developed in space compared to controls maintained on Earth. We found that there were significant changes in the distribution of cells that expressed CD11b, CD31, F4/80, Mac2, Ly6C and c-Fos. However, there were no changes in c-Fms expression and no consistent pattern of advanced or retarded differentiation during space flight. We also found a pattern of transcript levels that would be consistent with a relatively normal differentiation outcome but increased proliferation by the bone marrow macrophages that were assayed after 14 days of space flight. There also was a surprising pattern of space flight influence on genes of the coagulation pathway. These data confirm that a space flight can have an impact on the in vitro development of macrophages from mouse bone marrow cells.
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Affiliation(s)
| | | | - Stephen K. Chapes
- Corresponding author. Address: 116 Ackert Hall, Kansas State University, Manhattan, KS 66506-4901, USA. Tel.: +1 785 532 6795; fax: +1 785 532 6653.
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42
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Barish GD, Yu RT, Karunasiri MS, Becerra D, Kim J, Tseng TW, Tai LJ, Leblanc M, Diehl C, Cerchietti L, Miller YI, Witztum JL, Melnick AM, Dent AL, Tangirala RK, Evans RM. The Bcl6-SMRT/NCoR cistrome represses inflammation to attenuate atherosclerosis. Cell Metab 2012; 15:554-62. [PMID: 22465074 PMCID: PMC3367511 DOI: 10.1016/j.cmet.2012.02.012] [Citation(s) in RCA: 100] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2011] [Revised: 12/13/2011] [Accepted: 02/08/2012] [Indexed: 10/28/2022]
Abstract
Chronic inflammation is a hallmark of atherosclerosis, but its transcriptional underpinnings are poorly understood. We show that the transcriptional repressor Bcl6 is an anti-inflammatory regulator whose loss in bone marrow of Ldlr(-/-) mice results in severe atherosclerosis and xanthomatous tendonitis, a virtually pathognomonic complication in patients with familial hypercholesterolemia. Disruption of the interaction between Bcl6 and SMRT or NCoR with a peptide inhibitor in vitro recapitulated atherogenic gene changes in mice transplanted with Bcl6-deficient bone marrow, pointing to these cofactors as key mediators of Bcl6 inflammatory suppression. Using ChIP-seq, we reveal the SMRT and NCoR corepressor cistromes, each consisting of over 30,000 binding sites with a nearly 50% overlap. While the complete cistromes identify a diversity of signaling pathways, the Bcl6-bound subcistromes for each corepressor are highly enriched for NF-κB-driven inflammatory and tissue remodeling genes. These results reveal that Bcl6-SMRT/NCoR complexes constrain immune responses and contribute to the prevention of atherosclerosis.
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Affiliation(s)
- Grant D Barish
- Howard Hughes Medical Institute, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA
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Reynaud D, Pietras E, Barry-Holson K, Mir A, Binnewies M, Jeanne M, Sala-Torra O, Radich JP, Passegué E. IL-6 controls leukemic multipotent progenitor cell fate and contributes to chronic myelogenous leukemia development. Cancer Cell 2011; 20:661-73. [PMID: 22094259 PMCID: PMC3220886 DOI: 10.1016/j.ccr.2011.10.012] [Citation(s) in RCA: 242] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2011] [Revised: 08/09/2011] [Accepted: 10/13/2011] [Indexed: 11/24/2022]
Abstract
Using a mouse model recapitulating the main features of human chronic myelogenous leukemia (CML), we uncover the hierarchy of leukemic stem and progenitor cells contributing to disease pathogenesis. We refine the characterization of CML leukemic stem cells (LSCs) to the most immature long-term hematopoietic stem cells (LT-HSCs) and identify some important molecular deregulations underlying their aberrant behavior. We find that CML multipotent progenitors (MPPs) exhibit an aberrant B-lymphoid potential but are redirected toward the myeloid lineage by the action of the proinflammatory cytokine IL-6. We show that BCR/ABL activity controls Il-6 expression thereby establishing a paracrine feedback loop that sustains CML development. These results describe how proinflammatory tumor environment affects leukemic progenitor cell fate and contributes to CML pathogenesis.
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MESH Headings
- Animals
- Feedback, Physiological
- Fusion Proteins, bcr-abl/metabolism
- Fusion Proteins, bcr-abl/physiology
- Interleukin-6/genetics
- Interleukin-6/metabolism
- Interleukin-6/physiology
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/genetics
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/metabolism
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/pathology
- Mice
- Multipotent Stem Cells/pathology
- Precursor Cells, B-Lymphoid/metabolism
- Precursor Cells, B-Lymphoid/pathology
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Affiliation(s)
- Damien Reynaud
- The Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, Department of Medicine, Division of Hematology/Oncology, University of California San Francisco, San Francisco, California, 94143, USA
- Co-corresponding authors: Emmanuelle Passegué, PhD () Damien Reynaud, PhD () University of California San Francisco 35 Medical Way, Regeneration Medicine Building (RMB), Rm. 1017, Box 0667 San Francisco, CA 94143, USA Phone: 415-476-2426 Fax: 415-476-9273
| | - Eric Pietras
- The Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, Department of Medicine, Division of Hematology/Oncology, University of California San Francisco, San Francisco, California, 94143, USA
| | - Keegan Barry-Holson
- The Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, Department of Medicine, Division of Hematology/Oncology, University of California San Francisco, San Francisco, California, 94143, USA
| | - Alain Mir
- Fluidigm Corporation, South San Francisco, California, 94080, USA
| | - Mikhail Binnewies
- The Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, Department of Medicine, Division of Hematology/Oncology, University of California San Francisco, San Francisco, California, 94143, USA
| | - Marion Jeanne
- The Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, Department of Medicine, Division of Hematology/Oncology, University of California San Francisco, San Francisco, California, 94143, USA
| | - Olga Sala-Torra
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington 98109, USA
| | - Jerald P. Radich
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington 98109, USA
| | - Emmanuelle Passegué
- The Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, Department of Medicine, Division of Hematology/Oncology, University of California San Francisco, San Francisco, California, 94143, USA
- Co-corresponding authors: Emmanuelle Passegué, PhD () Damien Reynaud, PhD () University of California San Francisco 35 Medical Way, Regeneration Medicine Building (RMB), Rm. 1017, Box 0667 San Francisco, CA 94143, USA Phone: 415-476-2426 Fax: 415-476-9273
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44
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Jin X, Yin J, Kim SH, Sohn YW, Beck S, Lim YC, Nam DH, Choi YJ, Kim H. EGFR-AKT-Smad signaling promotes formation of glioma stem-like cells and tumor angiogenesis by ID3-driven cytokine induction. Cancer Res 2011; 71:7125-34. [PMID: 21975932 DOI: 10.1158/0008-5472.can-11-1330] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Aberrant activation of receptor tyrosine kinases (RTK) is causally linked to the pathobiological traits of glioblastoma and genesis of glioma stem-like cells (GSC), but the underlying mechanism is still unknown. Here, we show that epidermal growth factor receptor (EGFR) signaling regulates the proliferation, angiogenesis, and acquisition of GSC characteristics by inducing inhibitor of differentiation 3 (ID3) and ID3-regulated cytokines [GRO1 and interleukins (IL)-6 and 8] induction. We found that EGFR-mediated ID3 expression was regulated by Smad5, which was directly phosphorylated by AKT. Furthermore, ID3 alone imparted GSC features to primary astrocytes derived from Ink4a/Arf-deficient mouse, and EGFR-ID3-IL-6 signaling axis gave rise to tumor cell heterogeneity. Conversely, EGFR inhibitors suppressed EGFR-AKT-Smad5-driven induction of ID3, which led to a decrease in the tumorsphere forming ability of GSCs and U87MG cells that possess an active mutant EGFR, EGFRvIII, without obvious cytotoxic effects. However, these cells seemed to regain colonogenic ability after removal of the EGFR inhibitors. Together, the results delineate a novel integrative molecular mechanism in which the RTK-ID signaling pathway governs genesis and maintenance of GBM histopathologic features, such as GSCs-based tumor initiation, progression, and angiogenesis.
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Affiliation(s)
- Xun Jin
- School of Life Sciences and Biotechnology, Korea University, Seoul, Republic of Korea.
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45
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Ohtsuka H, Sakamoto A, Pan J, Inage S, Horigome S, Ichii H, Arima M, Hatano M, Okada S, Tokuhisa T. Bcl6 is required for the development of mouse CD4+ and CD8α+ dendritic cells. THE JOURNAL OF IMMUNOLOGY 2010; 186:255-63. [PMID: 21131418 DOI: 10.4049/jimmunol.0903714] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Th2-type inflammation spontaneously shown in Bcl6-knockout (KO) mice is mainly caused by bone marrow (BM)-derived nonlymphoid cells. However, the function of dendritic cells (DCs) in Bcl6-KO mice has not been reported. We show in this article that the numbers of CD4(+) conventional DCs (cDCs) and CD8α(+) cDCs, but not of plasmacytoid DCs, were markedly reduced in the spleen of Bcl6-KO mice. Generation of cDCs from DC progenitors in BM cells was perturbed in the spleen of irradiated wild-type (WT) mice transferred with Bcl6-KO BM cells, indicating an intrinsic effect of Bcl6 in cDC precursors. Although cDC precursors were developed in a Bcl6-KO BM culture with Fms-like tyrosine kinase 3 ligand, the cDC precursors were more apoptotic than WT ones. Also p53, one of the molecular targets of Bcl6, was overexpressed in the precursors. The addition of a p53 inhibitor to Bcl6-KO BM culture protected apoptosis, suggesting that Bcl6 is required by cDC precursors for survival by controlling p53 expression. Furthermore, large numbers of T1/ST2(+) Th2 cells were naturally developed in the spleen of Bcl6-KO mice. Th2 skewing was accelerated in the culture of WT CD4 T cells stimulated with Ags and LPS-activated Bcl6-KO BM-derived DCs, which produced more IL-6 and less IL-12 than did WT DCs; the addition of anti-IL-6 Abs to the culture partially abrogated the Th2 skewing. These results suggest that Bcl6 is required in cDC precursors for survival and in activated DCs for modulating the cytokine profile.
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Affiliation(s)
- Hiromi Ohtsuka
- Department of Developmental Genetics, Graduate School of Medicine, Chiba University, Chiba, Japan
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Barish GD, Yu RT, Karunasiri M, Ocampo CB, Dixon J, Benner C, Dent AL, Tangirala RK, Evans RM. Bcl-6 and NF-kappaB cistromes mediate opposing regulation of the innate immune response. Genes Dev 2010; 24:2760-5. [PMID: 21106671 DOI: 10.1101/gad.1998010] [Citation(s) in RCA: 204] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
In the macrophage, toll-like receptors (TLRs) are key sensors that trigger signaling cascades to activate inflammatory programs via the NF-κB gene network. However, the genomic network targeted by TLR/NF-κB activation and the molecular basis by which it is restrained to terminate activation and re-establish quiescence is poorly understood. Here, using chromatin immunoprecipitation sequencing (ChIP-seq), we define the NF-κB cistrome, which is comprised of 31,070 cis-acting binding sites responsive to lipopolysaccharide (LPS)-induced signaling. In addition, we demonstrate that the transcriptional repressor B-cell lymphoma 6 (Bcl-6) regulates nearly a third of the Tlr4-regulated transcriptome, and that 90% of the Bcl-6 cistrome is collapsed following Tlr4 activation. Bcl-6-deficient macrophages are acutely hypersensitive to LPS and, using comparative ChIP-seq analyses, we found that the Bcl-6 and NF-κB cistromes intersect, within nucleosomal distance, at nearly half of Bcl-6-binding sites in stimulated macrophages to promote opposing epigenetic modifications of the local chromatin. These results reveal a genomic strategy for controlling the innate immune response in which repressive and inductive cistromes establish a dynamic balance between macrophage quiescence and activation via epigenetically marked cis-regulatory elements.
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Affiliation(s)
- Grant D Barish
- Gene Expression Laboratory, Howard Hughes Medical Institute, The Salk Institute for Biological Studies, La Jolla, California 92037, USA
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47
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Peled JU, Yu JJ, Venkatesh J, Bi E, Ding BB, Krupski-Downs M, Shaknovich R, Sicinski P, Diamond B, Scharff MD, Ye BH. Requirement for cyclin D3 in germinal center formation and function. Cell Res 2010; 20:631-46. [PMID: 20404856 DOI: 10.1038/cr.2010.55] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Germinal centers (GC) of secondary lymphoid tissues are critical to mounting a high-affinity humoral immune response. B cells within the GC undergo rapid clonal expansion and selection while diversifying their antibody genes. Although it is generally believed that GC B cells employ a unique proliferative program to accommodate these processes, little is known about how the GC-associated cell cycle is orchestrated. The D-type cyclins constitute an important component of the cell cycle engine that enables the cells to respond to physiological changes. Cell type- and developmental stage-specific roles of D-type cyclins have been described but the cyclin D requirement during GC reaction has not been addressed. In this study, we report that cyclin D3 is largely dispensable for proliferation and Ig class switching of in vitro activated B cells. In contrast, GC development in Ccnd3(-/-) mice is markedly impaired, as is the T cell-dependent antibody response. Within the GC, although both switched and unswitched B cells are affected by cyclin D3 inactivation, the IgM(-) pool is more severely reduced. Interestingly, despite a compensatory increase in cyclin D2 expression, a significant number of Ccnd3(-/-) GC B cells accumulate in quiescent G0 state. Lastly, although cyclin D3 inactivation did not disrupt BCL6 expression in GC B cells, it completely blocked the GC promoting effect of BCL6 overexpression, suggesting that cyclin D3 acts downstream of BCL6 to regulate GC formation. This is the first demonstration that cyclin D3 plays an important and unique role at the GC stage of B cell development.
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Affiliation(s)
- Jonathan U Peled
- Department of Cell Biology, Albert Einstein College of Medicine, Bronx, NY 10461, USA
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48
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Mondal A, Sawant D, Dent AL. Transcriptional repressor BCL6 controls Th17 responses by controlling gene expression in both T cells and macrophages. THE JOURNAL OF IMMUNOLOGY 2010; 184:4123-32. [PMID: 20212093 DOI: 10.4049/jimmunol.0901242] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The transcriptional repressor protein BCL6 regulates T cell differentiation by repressing Th2 responses and promoting follicular Th cell responses. However, little is known about the role of BCL6 in Th17 responses. We found that memory T cells from BCL6-deficient mice had increased IL-17 production. Additionally, BCL6 expression is upregulated in CD4 T cells cultured under Th17 conditions. T cells from BCL6-deficient mice showed defective Th17 differentiation and enhanced IL-4 production in vitro; however, normal Th17 differentiation was obtained with BCL6-deficient T cells under culture conditions when highly pure naive CD4 T cells were used, when IL-4 production was inhibited, or when TGF-beta levels were increased. Retrovirus-mediated expression of BCL6 in CD4 T cells repressed IL-4 and augmented basal IL-17 mRNA expression. These data support the idea that BCL6 promotes Th17 differentiation through suppression of Th2 differentiation. BCL6-deficient T cells transplanted into Rag1(-/-) mice produced wild-type levels of IL-17, indicating that, in vivo, BCL6-deficient T cells develop relatively normal Th17 responses. Macrophages from BCL6-deficient mice showed strikingly increased expression of the Th17-promoting cytokines IL-6, IL-23, and TGF-beta, and conditioned media from BCL6-deficient macrophages promoted augmented IL-17 expression by T cells. We propose that the increased Th17 activity in BCL6-deficient mice is due, in part, to BCL6-deficient macrophages promoting increased Th17 differentiation in vivo. T cells may require BCL6 for optimal Th17 differentiation; however, BCL6 function in macrophages critically regulates Th17 differentiation in vivo. We hypothesize that increased Th17 differentiation aggravates the severe Th2-type inflammatory disease in BCL6-deficient mice.
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Affiliation(s)
- Arpita Mondal
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
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49
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Mrugala D, Dossat N, Ringe J, Delorme B, Coffy A, Bony C, Charbord P, Häupl T, Daures JP, Noël D, Jorgensen C. Gene expression profile of multipotent mesenchymal stromal cells: Identification of pathways common to TGFbeta3/BMP2-induced chondrogenesis. CLONING AND STEM CELLS 2009; 11:61-76. [PMID: 19196040 DOI: 10.1089/clo.2008.0070] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Multipotent mesenchymal stromal cells (MSC) display a high potential for the development of novel treatment strategies for cartilage repair. However, the pathways involved in their differentiation to functional non hypertrophic chondrocytes remain largely unknown, despite the work on embryologic development and the identification of key growth factors including TGFbeta, Hh, Wnt and FGF. In this study, we asked if we could identify specific biological networks common to the growth factors used (TGFbeta3 or BMP-2). To address this question, we used DNA microarrays and performed large-scale expression profiling of MSC at different time points during their chondrogenic differentiation. By comparing these data with those obtained during the differentiation of MSC into osteoblasts and adipocytes, we identified 318 genes specific for chondrogenesis and developed a new algorithm to classify the genes according to their kinetic profile. We distributed the selected genes in five classes according to their kinetic of expression. We could reconstruct three phases characterized by functional pathways. The first phase corresponds to cell attachment and apoptosis induction; the second phase is characterized by a proliferation/differentiation step, and the third phase is characterized by a differentiation/hypertrophy pathway. Indeed, these data propose new pathways to understand the complexity of MSC differentiation to chondrocytes.
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50
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Lee W, Narang V, Xu H, Lin F, Chin K, Sung W. DREAM2 Challenge. Ann N Y Acad Sci 2009; 1158:196-204. [DOI: 10.1111/j.1749-6632.2008.03755.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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