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Brandao-Rangel MAR, Moraes-Ferreira R, Silva-Reis A, Souza-Palmeira VH, Almeida FM, da Silva Olimpio FR, Oliveira CR, Damaceno-Rodrigues NR, Pesquero JB, Martin L, Aimbire F, Albertini R, Faria SS, Vieira RP. Aerobic physical training reduces severe asthma phenotype involving kinins pathway. Mol Biol Rep 2024; 51:499. [PMID: 38598121 DOI: 10.1007/s11033-024-09474-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Accepted: 03/25/2024] [Indexed: 04/11/2024]
Abstract
INTRODUCTION Aerobic physical training (APT) reduces eosinophilic airway inflammation, but its effects and mechanisms in severe asthma remain unknown. METHODS An in vitro study employing key cells involved in the pathogenesis of severe asthma, such as freshly isolated human eosinophils, neutrophils, and bronchial epithelial cell lineage (BEAS-2B) and lung fibroblasts (MRC-5 cells), was conducted. Additionally, an in vivo study using male C57Bl/6 mice, including Control (Co; n = 10), Trained (Exe; n = 10), house dust mite (HDM; n = 10), and HDM + Trained (HDM + Exe; n = 10) groups, was carried out, with APT performed at moderate intensity, 5x/week, for 4 weeks. RESULTS HDM and bradykinin, either alone or in combination, induced hyperactivation in human neutrophils, eosinophils, BEAS-2B, and MRC-5 cells. In contrast, IL-10, the primary anti-inflammatory molecule released during APT, inhibited these inflammatory effects, as evidenced by the suppression of numerous cytokines and reduced mRNA expression of the B1 receptor and ACE-2. The in vivo study demonstrated that APT decreased bronchoalveolar lavage levels of bradykinin, IL-1β, IL-4, IL-5, IL-17, IL-33, TNF-α, and IL-13, while increasing levels of IL-10, klotho, and IL-1RA. APT reduced the accumulation of polymorphonuclear cells, lymphocytes, and macrophages in the peribronchial space, as well as collagen fiber accumulation, epithelial thickness, and mucus accumulation. Furthermore, APT lowered the expression of the B1 receptor and ACE-2 in lung tissue and reduced bradykinin levels in the lung tissue homogenate compared to the HDM group. It also improved airway resistance, tissue resistance, and tissue damping. On a systemic level, APT reduced total leukocytes, eosinophils, neutrophils, basophils, lymphocytes, and monocytes in the blood, as well as plasma levels of IL-1β, IL-4, IL-5, IL-17, TNF-α, and IL-33, while elevating the levels of IL-10 and IL-1RA. CONCLUSION These findings indicate that APT inhibits the severe asthma phenotype by targeting kinin signaling.
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Affiliation(s)
- Maysa Alves Rodrigues Brandao-Rangel
- Post-graduate Program in Sciences of Human Movement and Rehabilitation, Federal University of São Paulo (UNIFESP), Avenida Ana Costa 95, Santos, SP, 11060-001, Brazil
| | - Renilson Moraes-Ferreira
- Post-graduate Program in Sciences of Human Movement and Rehabilitation, Federal University of São Paulo (UNIFESP), Avenida Ana Costa 95, Santos, SP, 11060-001, Brazil
| | - Anamei Silva-Reis
- Post-graduate Program in Sciences of Human Movement and Rehabilitation, Federal University of São Paulo (UNIFESP), Avenida Ana Costa 95, Santos, SP, 11060-001, Brazil
| | - Victor Hugo Souza-Palmeira
- Post-graduate Program in Sciences of Human Movement and Rehabilitation, Federal University of São Paulo (UNIFESP), Avenida Ana Costa 95, Santos, SP, 11060-001, Brazil
| | - Francine Maria Almeida
- Laboratory of Experimental Therapeutic (LIM 20), School of Medicine, University of São Paulo, Avenida Doutor Arnaldo 455, São Paulo, SP, 01246-903, Brazil
| | - Fabiana Regina da Silva Olimpio
- Post-graduate Program in Translational Medicine, Department of Medicine, Federal University of São Paulo (UNIFESP), Rua Pedro De Toledo 720, 2º Andar, São Paulo, SP, 04039-002, Brazil
| | - Carlos Rocha Oliveira
- School of Medicine, Anhembi Morumbi University, Avenida Deputado Benedito Matarazzo 6070, São José dos Campos, SP, 12230-002, Brazil
- Post-graduate Program in Biomedical Enginnering, Federal University of São Paulo (UNIFESP), Rua Talim 330, São José dos Campos, SP, 12231-280, Brazil
- GAP Biotech, Rua Comendador Remo Cesaroni 223, São José dos Campos, SP, 12243-020, Brazil
| | - Nilsa Regina Damaceno-Rodrigues
- Laboratory of Cellular Biology (LIM 59 HCFMUSP), School of Medicine, University of São Paulo, Avenida Doutor Arnaldo 455, São Paulo, SP, 01246-903, Brazil
| | - João Bosco Pesquero
- Department of Biophysics, Federal University of São Paulo (UNIFESP), Rua Botucatu 740, São Paulo, SP, 04023-062, Brazil
| | - Leonardo Martin
- Department of Biophysics, Federal University of São Paulo (UNIFESP), Rua Botucatu 740, São Paulo, SP, 04023-062, Brazil
- Division of Medical Sciences, Laboratory of Transcriptional Regulation, Institute of Medical Biology of Polish, Academy of Sciences (IMB-PAS), Lodowa 106, Lodz, 93-232, Poland
- Laboratory of Physiopharmacology, University of Antwerp, Antwerp, Belgium
| | - Flavio Aimbire
- Post-graduate Program in Translational Medicine, Department of Medicine, Federal University of São Paulo (UNIFESP), Rua Pedro De Toledo 720, 2º Andar, São Paulo, SP, 04039-002, Brazil
| | - Regiane Albertini
- Post-graduate Program in Sciences of Human Movement and Rehabilitation, Federal University of São Paulo (UNIFESP), Avenida Ana Costa 95, Santos, SP, 11060-001, Brazil
| | - Sara Socorro Faria
- Post-graduate Programs in Humam Movement and Rehabilitation and in Pharmaceutical Sciences, Evangelical University of Goias (UniEvavngelica), Avenida Universitária Km3,5, Anápolis, GO, 75083-515, Brazil
| | - Rodolfo P Vieira
- Post-graduate Program in Sciences of Human Movement and Rehabilitation, Federal University of São Paulo (UNIFESP), Avenida Ana Costa 95, Santos, SP, 11060-001, Brazil.
- Post-graduate Programs in Humam Movement and Rehabilitation and in Pharmaceutical Sciences, Evangelical University of Goias (UniEvavngelica), Avenida Universitária Km3,5, Anápolis, GO, 75083-515, Brazil.
- Brazilian Institute of Teaching and Research in Pulmonary and Exercise Immunology (IBEPIPE), Rua Pedro Ernesto 240, São José dos Campos, SP, 12245-520, Brazil.
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Vasconcelos JA, Mota AS, Olímpio F, Rosa PC, Damaceno-Rodrigues N, de Paula Vieira R, Taddei CR, Aimbire F. Lactobacillus rhamnosus Modulates Lung Inflammation and Mitigates Gut Dysbiosis in a Murine Model of Asthma-COPD Overlap Syndrome. Probiotics Antimicrob Proteins 2023:10.1007/s12602-023-10167-2. [PMID: 37837484 DOI: 10.1007/s12602-023-10167-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/18/2023] [Indexed: 10/16/2023]
Abstract
The asthma-COPD overlap syndrome (ACOS) presents lung inflammation similar to both asthma and chronic obstructive pulmonary disease (COPD). Due to the immune response between the lung and gut, it is possible that ACOS individuals present gut dysbiosis. Due to therapeutic limitations in ACOS, Lactobacillus rhamnosus (Lr) have received attention once Lr has been effective in asthma and COPD. However, there is no data about the Lr effect on both lung inflammation and gut dysbiosis in ACOS. Thus, our study investigated the Lr effect on lung inflammation, bronchoconstriction, airway remodeling, and gut dysbiosis in the murine ACOS model. Treated mice with Lr were exposed to HDM and cigarette smoke to induce ACOS. Sixty days after ACOS induction, mice were euthanized. Lung inflammation was evaluated in leukocytes in bronchoalveolar lavage fluid (BALF), airway remodeling, cytokine secretion, and transcription factor expression in the lung. The gut microbiota was assayed by 16S mRNA sequencing from a fecal sample. Leukocyte population, bronchial hyperreactivity, pro-inflammatory cytokines, and airway remodeling were attenuated in Lr-treated ACOS mice. Likewise, IL-4, IL-5, and IL-13, STAT6 and GATA3, as well as IL-17, IL-21, IL-22, STAT3, and RORɣt were reduced after Lr. In addition, IL-2, IL-12, IFN-γ, STAT1, and T-bet as well as IL-10, TGF-β, STAT5, and Foxp3 were restored after the Lr. Firmicutes was reduced, while Deferribacteres was increased after Lr. Likewise, Lr decreased Staphylococcus and increased Mucispirillum in ACOS mice. Lr improves fecal bacterial β-diversity. Our findings show for the first time the Lr effect on lung inflammation and gut dysbiosis in murine ACOS.
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Affiliation(s)
- Jéssica Aparecida Vasconcelos
- Department of Medicine, Postgraduate Program in Translational Medicine, Federal University of São Paulo (UNIFESP), Rua Pedro De Toledo, 720 - 2° Andar, Vila Clementino, 04039-002, Sao Paulo, SP, Brazil
- Lab. Immunopharmacology, Department of Science and Technology, Federal University of São Paulo (UNIFESP), Rua Talim, 330, Vila Nair, 12231-280, Sao Jose dos Campos, SP, Brazil
| | - Amanda Sodre Mota
- Department of Clinical and Toxicological Analyses - São Paulo, School of Pharmaceutical Sciences, University of São Paulo (USP), Avenida Professor Lineu Prestes, 580, Cidade Universitária, 05508-000, São Paulo, SP, Brazil
| | - Fabiana Olímpio
- Department of Medicine, Postgraduate Program in Translational Medicine, Federal University of São Paulo (UNIFESP), Rua Pedro De Toledo, 720 - 2° Andar, Vila Clementino, 04039-002, Sao Paulo, SP, Brazil
- Lab. Immunopharmacology, Department of Science and Technology, Federal University of São Paulo (UNIFESP), Rua Talim, 330, Vila Nair, 12231-280, Sao Jose dos Campos, SP, Brazil
| | - Paloma Cristina Rosa
- Department of Medicine, Postgraduate Program in Translational Medicine, Federal University of São Paulo (UNIFESP), Rua Pedro De Toledo, 720 - 2° Andar, Vila Clementino, 04039-002, Sao Paulo, SP, Brazil
- Lab. Immunopharmacology, Department of Science and Technology, Federal University of São Paulo (UNIFESP), Rua Talim, 330, Vila Nair, 12231-280, Sao Jose dos Campos, SP, Brazil
| | - Nilsa Damaceno-Rodrigues
- Laboratory of Cell Biology, Department of Pathology, School of Medicine, University of São Paulo (USP), São Paulo, São Paulo, Brazil
| | - Rodolfo de Paula Vieira
- Post-graduate Program in Human Movement and Rehabilitation and in Pharmaceutical Sciences, UniEvangelica, Avenida Universitária Km 3,5, Anapolis, GP, 75083-515, Brazil
| | - Carla Romano Taddei
- Department of Clinical and Toxicological Analyses - São Paulo, School of Pharmaceutical Sciences, University of São Paulo (USP), Avenida Professor Lineu Prestes, 580, Cidade Universitária, 05508-000, São Paulo, SP, Brazil
| | - Flavio Aimbire
- Department of Medicine, Postgraduate Program in Translational Medicine, Federal University of São Paulo (UNIFESP), Rua Pedro De Toledo, 720 - 2° Andar, Vila Clementino, 04039-002, Sao Paulo, SP, Brazil.
- Lab. Immunopharmacology, Department of Science and Technology, Federal University of São Paulo (UNIFESP), Rua Talim, 330, Vila Nair, 12231-280, Sao Jose dos Campos, SP, Brazil.
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Remling L, Gregus A, Wirths O, Meyer T, Staab J. A novel interface between the N-terminal and coiled-coil domain of STAT1 functions in an auto-inhibitory manner. Cell Commun Signal 2023; 21:170. [PMID: 37430250 DOI: 10.1186/s12964-023-01124-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 04/05/2023] [Indexed: 07/12/2023] Open
Abstract
BACKGROUND STAT1 is an intracellular signaling molecule that is crucially involved in the regulation of the innate immune system by activation of defense mechanisms against microbial pathogens. Phosphorylation-dependent activation of the STAT1 transcription factor is associated with a conversion from an antiparallel to parallel dimer configuration, which after nuclear import binds to DNA. However, not much is known about the specific intermolecular interactions that stabilize unphosphorylated, antiparallel STAT1 complexes prior to activation. RESULTS In this study, we identified a previously unknown interdimeric interaction site, which is involved in the termination of STAT1 signaling. Introduction of the glutamic acid-to-alanine point mutation E169A in the coiled-coil domain (CCD) by site-directed mutagenesis led to increased tyrosine phosphorylation as well as accelerated and prolonged nuclear accumulation in transiently transfected cells. In addition, DNA-binding affinity and transcriptional activity were strongly enhanced in the substitution mutant compared to the wild-type (WT) protein. Furthermore, we have demonstrated that the E169 residue in the CCD mediates the release of the dimer from the DNA in an auto-inhibitory manner. CONCLUSION Based on these findings, we propose a novel mechanism for the inactivation of the STAT1 signaling pathway, assigning the interface with the glutamic acid residue 169 in the CCD a crucial role in this process. Video Abstract.
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Affiliation(s)
- Linus Remling
- Department of Psychosomatic Medicine and Psychotherapy, University Medical Center Göttingen, Göttingen, Germany
| | - Anke Gregus
- Department of Psychosomatic Medicine and Psychotherapy, University Medical Center Göttingen, Göttingen, Germany
| | - Oliver Wirths
- Department of Psychiatry and Psychotherapy, University Medical Center Göttingen, Göttingen, Germany
| | - Thomas Meyer
- Department of Psychosomatic Medicine and Psychotherapy, University Medical Center Göttingen, Göttingen, Germany
- German Centre for Cardiovascular Research (DZHK), Partner Site Göttingen, Göttingen, Germany
| | - Julia Staab
- Department of Psychosomatic Medicine and Psychotherapy, University Medical Center Göttingen, Göttingen, Germany.
- German Centre for Cardiovascular Research (DZHK), Partner Site Göttingen, Göttingen, Germany.
- Department of Psychosomatic Medicine and Psychotherapy, Laboratory of Molecular Psychocardiology, University of Göttingen, Waldweg 33, 37073, Göttingen, Germany.
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Roškar Z, Dreisinger M, Tič P, Homšak E, Bevc S, Goropevšek A. New Flow Cytometric Methods for Monitoring STAT5 Signaling Reveal Responses to SARS-CoV-2 Antigen-Specific Stimulation in FOXP3+ Regulatory T Cells also in Patients with Advanced Chronic Lymphocytic Leukemia. Biosensors (Basel) 2023; 13:bios13050539. [PMID: 37232900 DOI: 10.3390/bios13050539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 05/04/2023] [Accepted: 05/08/2023] [Indexed: 05/27/2023]
Abstract
Increased frequency of CD4+CD25+ regulatory T-cells (Treg) has been associated with disease progression in chronic lymphocytic leukemia (CLL). Flow cytometric methods, which allow for the simultaneous analysis of their specific transcription factor Foxp3 and activated STAT proteins, together with proliferation can help to elucidate the signaling mechanisms driving Treg expansion and suppression of FOXP3- conventional CD4+T-cells (Tcon). Herein, we first report a novel approach in which STAT5 phosphorylation (pSTAT5) and proliferation (BrdU-FITC incorporation) could be analyzed specifically in FOXP3+ and FOXP3- responding cells after CD3/CD28 stimulation. The addition of magnetically purified CD4+CD25+ T-cells from healthy donors to cocultured autologous CD4+CD25- T-cells resulted in suppression of Tcon cell cycle progression accompanied by a decrease in pSTAT5. Next, a method using imaging flow cytometry is presented for the detection of cytokine-dependent pSTAT5 nuclear translocation in FOXP3-expressing cells. Finally, we discuss our experimental data obtained by combining Treg pSTAT5 analysis and antigen-specific stimulation with SARS-CoV-2 antigens. Applying these methods on samples from patients revealed Treg responses to antigen-specific stimulation and significantly higher basal pSTAT5 in CLL patients treated with immunochemotherapy. Thus, we speculate that through the use of this pharmacodynamic tool, the efficacy of immunosuppressive drugs and their possible off-target effects can be assessed.
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Affiliation(s)
- Zlatko Roškar
- Department of Haematology, University Medical Centre Maribor, 2000 Maribor, Slovenia
| | - Mojca Dreisinger
- Department of Haematology, University Medical Centre Maribor, 2000 Maribor, Slovenia
| | - Primož Tič
- Department of Laboratory Diagnostics, University Medical Centre Maribor, 2000 Maribor, Slovenia
| | - Evgenija Homšak
- Department of Laboratory Diagnostics, University Medical Centre Maribor, 2000 Maribor, Slovenia
| | - Sebastjan Bevc
- Faculty of Medicine, University of Maribor, 2000 Maribor, Slovenia
- Department of Nephrology, University Medical Center Maribor, 2000 Maribor, Slovenia
| | - Aleš Goropevšek
- Department of Laboratory Diagnostics, University Medical Centre Maribor, 2000 Maribor, Slovenia
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Russ E, Mikhalkevich N, Iordanskiy S. Expression of Human Endogenous Retrovirus Group K (HERV-K) HML-2 Correlates with Immune Activation of Macrophages and Type I Interferon Response. Microbiol Spectr 2023; 11:e0443822. [PMID: 36861980 PMCID: PMC10100713 DOI: 10.1128/spectrum.04438-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 01/30/2023] [Indexed: 03/03/2023] Open
Abstract
Human endogenous retroviruses (HERVs) comprise about 8.3% of the human genome and are capable of producing RNA molecules that can be sensed by pattern recognition receptors, leading to the activation of innate immune response pathways. The HERV-K (HML-2) subgroup is the youngest HERV clade with the highest degree of coding competence. Its expression is associated with inflammation-related diseases. However, the precise HML-2 loci, stimuli, and signaling pathways involved in these associations are not well understood or defined. To elucidate HML-2 expression on a locus-specific level, we used the retroelement sequencing tools TEcount and Telescope to analyze publicly available transcriptome sequencing (RNA-seq) and chromatin immunoprecipitation (ChIP) sequencing data sets of macrophages treated with a wide range of agonists. We found that macrophage polarization significantly correlates with modulation of the expression of specific HML-2 proviral loci. Further analysis demonstrated that the provirus HERV-K102, located in an intergenic region of locus 1q22, constituted the majority of the HML-2 derived transcripts following pro-inflammatory (M1) polarization and was upregulated explicitly in response to interferon gamma (IFN-γ) signaling. We found that signal transducer and activator of transcription 1 and interferon regulatory factor 1 interact with a solo long terminal repeat (LTR) located upstream of HERV-K102, termed LTR12F, following IFN-γ signaling. Using reporter constructs, we demonstrated that LTR12F is critical for HERV-K102 upregulation by IFN-γ. In THP1-derived macrophages, knockdown of HML-2 or knockout of MAVS, an adaptor of RNA-sensing pathways, significantly downregulated genes containing interferon-stimulated response elements (ISREs) in their promoters, suggesting an intermediate role of HERV-K102 in the switch from IFN-γ signaling to the activation of type I interferon expression and, therefore, in a positive feedback loop to enhance pro-inflammatory signaling. IMPORTANCE The human endogenous retrovirus group K subgroup, HML-2, is known to be elevated in a long list of inflammation-associated diseases. However, a clear mechanism for HML-2 upregulation in response to inflammation has not been defined. In this study, we identify a provirus of the HML-2 subgroup, HERV-K102, which is significantly upregulated and constitutes the majority of the HML-2 derived transcripts in response to pro-inflammatory activation of macrophages. Moreover, we identify the mechanism of HERV-K102 upregulation and demonstrate that HML-2 expression enhances interferon-stimulated response element activation. We also demonstrate that this provirus is elevated in vivo and correlates with interferon gamma signaling activity in cutaneous leishmaniasis patients. This study provides key insights into the HML-2 subgroup and suggests that it may participate in enhancing pro-inflammatory signaling in macrophages and probably other immune cells.
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Affiliation(s)
- Eric Russ
- Department of Pharmacology & Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
- The Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, Maryland, USA
- Graduate Program of Cellular and Molecular Biology, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
| | - Natallia Mikhalkevich
- Department of Pharmacology & Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
- The Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, Maryland, USA
| | - Sergey Iordanskiy
- Department of Pharmacology & Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
- Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
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Wilson A, Periandri EM, Sievers M, Petruccelli E. Drosophila Stat92E Signaling Following Pre-exposure to Ethanol. Neurosci Insights 2023; 18:26331055221146755. [PMID: 36643884 PMCID: PMC9834942 DOI: 10.1177/26331055221146755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Accepted: 12/06/2022] [Indexed: 01/11/2023] Open
Abstract
Repeated exposure to alcohol alters neuromolecular signaling that influences acute and long-lasting behaviors underlying Alcohol Use Disorder (AUD). Recent animal model research has implicated changes in the conserved JAK/STAT pathway, a signaling pathway classically associated with development and the innate immune system. How ethanol exposure impacts STAT signaling within neural cells is currently unclear. Here, we investigated the role of Drosophila Stat92E in ethanol-induced locomotion, signaling activity, and downstream transcriptional responses. Findings suggest that expressing Stat92E-RNAi causes enhanced ethanol-induced hyperactivity in flies previously exposed to ethanol. Furthermore, alternative splicing of Stat92E itself was detected after repeated ethanol exposure, although no changes were found in downstream transcriptional activity. This work adds to our growing understanding of altered neuromolecular signaling following ethanol exposure and suggests that STAT signaling may be a relevant target to consider for AUD treatment.
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Affiliation(s)
| | | | | | - Emily Petruccelli
- Emily Petruccelli, Southern Illinois University Edwardsville College of Arts and Sciences, 44 Circle Dr, Edwardsville, IL 62026, USA.
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Macedo AB, Levinger C, Nguyen BN, Richard J, Gupta M, Cruz CRY, Finzi A, Chiappinelli KB, Crandall KA, Bosque A. The HIV Latency Reversal Agent HODHBt Enhances NK Cell Effector and Memory-Like Functions by Increasing Interleukin-15-Mediated STAT Activation. J Virol 2022; 96:e0037222. [PMID: 35867565 PMCID: PMC9364794 DOI: 10.1128/jvi.00372-22] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 06/29/2022] [Indexed: 11/20/2022] Open
Abstract
Elimination of human immunodeficiency virus (HIV) reservoirs is a critical endpoint to eradicate HIV. One therapeutic intervention against latent HIV is "shock and kill." This strategy is based on the transcriptional activation of latent HIV with a latency-reversing agent (LRA) with the consequent killing of the reactivated cell by either the cytopathic effect of HIV or the immune system. We have previously found that the small molecule 3-hydroxy-1,2,3-benzotriazin-4(3H)-one (HODHBt) acts as an LRA by increasing signal transducer and activator of transcription (STAT) factor activation mediated by interleukin-15 (IL-15) in cells isolated from aviremic participants. The IL-15 superagonist N-803 is currently under clinical investigation to eliminate latent reservoirs. IL-15 and N-803 share similar mechanisms of action by promoting the activation of STATs and have shown some promise in preclinical models directed toward HIV eradication. In this work, we evaluated the ability of HODHBt to enhance IL-15 signaling in natural killer (NK) cells and the biological consequences associated with increased STAT activation in NK cell effector and memory-like functions. We showed that HODHBt increased IL-15-mediated STAT phosphorylation in NK cells, resulting in increases in the secretion of CXCL-10 and interferon gamma (IFN-γ) and the expression of cytotoxic proteins, including granzyme B, granzyme A, perforin, granulysin, FASL, and TRAIL. This increased cytotoxic profile results in increased cytotoxicity against HIV-infected cells and different tumor cell lines. HODHBt also improved the generation of cytokine-induced memory-like NK cells. Overall, our data demonstrate that enhancing the magnitude of IL-15 signaling with HODHBt favors NK cell cytotoxicity and memory-like generation, and thus, targeting this pathway could be further explored for HIV cure interventions. IMPORTANCE Several clinical trials targeting the HIV latent reservoir with LRAs have been completed. In spite of a lack of clinical benefit, they have been crucial to elucidate hurdles that "shock and kill" strategies have to overcome to promote an effective reduction of the latent reservoir to lead to a cure. These hurdles include low reactivation potential mediated by LRAs, the negative influence of some LRAs on the activity of natural killer and effector CD8 T cells, an increased resistance to apoptosis of latently infected cells, and an exhausted immune system due to chronic inflammation. To that end, finding therapeutic strategies that can overcome some of these challenges could improve the outcome of shock and kill strategies aimed at HIV eradication. Here, we show that the LRA HODHBt also improves IL-15-mediated NK cell effector and memory-like functions. As such, pharmacological enhancement of IL-15-mediated STAT activation can open new therapeutic avenues toward an HIV cure.
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Affiliation(s)
- Amanda B. Macedo
- Department of Microbiology, Immunology, & Tropical Medicine, The George Washington University, Washington, DC, USA
| | - Callie Levinger
- Department of Microbiology, Immunology, & Tropical Medicine, The George Washington University, Washington, DC, USA
| | - Bryan N. Nguyen
- Computational Biology Institute, Milken Institute School of Public Health, The George Washington University, Washington, DC, USA
- Department of Biostatistics & Bioinformatics, Milken Institute School of Public Health, The George Washington University, Washington, DC, USA
| | - Jonathan Richard
- Centre de Recherche du CHUM, Montreal, Quebec, Canada
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, Quebec, Canada
| | - Mamta Gupta
- Department of Biochemistry & Molecular Medicine, School of Medicine & Health Sciences, The George Washington University, Washington, DC, USA
- GW Cancer Center, Washington, DC, USA
| | - Conrad Russell Y. Cruz
- GW Cancer Center, Washington, DC, USA
- Children’s National Medical Center, Washington, DC, USA
| | - Andrés Finzi
- Centre de Recherche du CHUM, Montreal, Quebec, Canada
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, Quebec, Canada
| | - Katherine B. Chiappinelli
- Department of Microbiology, Immunology, & Tropical Medicine, The George Washington University, Washington, DC, USA
- GW Cancer Center, Washington, DC, USA
| | - Keith A. Crandall
- Computational Biology Institute, Milken Institute School of Public Health, The George Washington University, Washington, DC, USA
- Department of Biostatistics & Bioinformatics, Milken Institute School of Public Health, The George Washington University, Washington, DC, USA
| | - Alberto Bosque
- Department of Microbiology, Immunology, & Tropical Medicine, The George Washington University, Washington, DC, USA
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Eskandarian Boroujeni M, Sekrecka A, Antonczyk A, Hassani S, Sekrecki M, Nowicka H, Lopacinska N, Olya A, Kluzek K, Wesoly J, Bluyssen HAR. Dysregulated Interferon Response and Immune Hyperactivation in Severe COVID-19: Targeting STATs as a Novel Therapeutic Strategy. Front Immunol 2022; 13:888897. [PMID: 35663932 PMCID: PMC9156796 DOI: 10.3389/fimmu.2022.888897] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 04/13/2022] [Indexed: 01/08/2023] Open
Abstract
A disease outbreak in December 2019, caused by a novel coronavirus SARS-CoV-2, was named COVID-19. SARS-CoV-2 infects cells from the upper and lower respiratory tract system and is transmitted by inhalation or contact with infected droplets. Common clinical symptoms include fatigue, fever, and cough, but also shortness of breath and lung abnormalities. Still, some 5% of SARS-CoV-2 infections progress to severe pneumonia and acute respiratory distress syndrome (ARDS), with pulmonary edema, acute kidney injury, and/or multiple organ failure as important consequences, which can lead to death. The innate immune system recognizes viral RNAs and triggers the expression of interferons (IFN). IFNs activate anti-viral effectors and components of the adaptive immune system by activating members of the STAT and IRF families that induce the expression of IFN-stimulated genes (ISG)s. Among other coronaviruses, such as Middle East respiratory syndrome coronavirus (MERS-CoV) and SARS-CoV, common strategies have been identified to antagonize IFN signaling. This typically coincides with hyperactive inflammatory host responses known as the “cytokine storm” that mediate severe lung damage. Likewise, SARS-CoV-2 infection combines a dysregulated IFN response with excessive production of inflammatory cytokines in the lungs. This excessive inflammatory response in the lungs is associated with the local recruitment of immune cells that create a pathogenic inflammatory loop. Together, it causes severe lung pathology, including ARDS, as well as damage to other vulnerable organs, like the heart, spleen, lymph nodes, and kidney, as well as the brain. This can rapidly progress to multiple organ exhaustion and correlates with a poor prognosis in COVID-19 patients. In this review, we focus on the crucial role of different types of IFN that underlies the progression of SARS-CoV-2 infection and leads to immune cell hyper-activation in the lungs, exuberant systemic inflammation, and multiple organ damage. Consequently, to protect from systemic inflammation, it will be critical to interfere with signaling cascades activated by IFNs and other inflammatory cytokines. Targeting members of the STAT family could therefore be proposed as a novel therapeutic strategy in patients with severe COVID-19.
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Affiliation(s)
- Mahdi Eskandarian Boroujeni
- Laboratory of Human Molecular Genetics, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
| | - Agata Sekrecka
- Laboratory of Human Molecular Genetics, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
| | - Aleksandra Antonczyk
- Laboratory of Human Molecular Genetics, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
| | - Sanaz Hassani
- Laboratory of Human Molecular Genetics, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
| | - Michal Sekrecki
- Laboratory of Human Molecular Genetics, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
| | - Hanna Nowicka
- Laboratory of Human Molecular Genetics, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
| | - Natalia Lopacinska
- Laboratory of Human Molecular Genetics, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
| | - Arta Olya
- Laboratory of Human Molecular Genetics, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
| | - Katarzyna Kluzek
- Laboratory of Human Molecular Genetics, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
| | - Joanna Wesoly
- Laboratory of High Throughput Technologies, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
| | - Hans A R Bluyssen
- Laboratory of Human Molecular Genetics, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
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9
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Wang D, Yang F, Shang W, Zhao Z, Shen J, Cai H. Paeoniflorin-loaded pH-sensitive liposomes alleviate synovial inflammation by altering macrophage polarity via STAT signaling. Int Immunopharmacol 2021; 101:108310. [PMID: 34749294 DOI: 10.1016/j.intimp.2021.108310] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 10/08/2021] [Accepted: 10/23/2021] [Indexed: 01/19/2023]
Abstract
Macrophage polarization plays a prominent role in the pathogenesis of rheumatoid arthritis (RA) and could be regulated by natural extracts paeoniflorin (Pae) but with low bioavailability. In the present study, Pae-loaded liposomes (Pae-LS) with co-conjugation of folate and PEG were prepared for the improvement of therapeutic benefits. We evaluated biophysical characterizations of Pae-LS and macrophage uptake of liposomes, as well as gain insight into whether Pae-LS can improve synovial inflammation in CIA rats and how Pae-LS promoted RAW 264.7 macrophages phenotype switch. We found that Pae-LS showed physical stability, sustained release, long circulation, pH-responsive properties, and higher uptake by active macrophages than free Pae. Furthermore, Pae-LS could repress STAT1 phosphorylation to reduce the levels of pro-inflammatory cytokines (IL-1β, IL-6, and TNF-α) and iNOS expression, as well as lead to a marked increase in anti-inflammatory cytokine (IL-10) and CD206 levels via elevated p-STAT6. In contrast to free Pae, Pae-LS treatment was more effective in alleviating synovial inflammation and hyperplasia in the ankle joint of CIA rats. Our study revealed Pae-LS could effectively suppress synovial inflammation of CIA rats by regulating macrophage polarization via STAT signaling and had the potential for RA treatment as liposome delivery carriers systems.
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Affiliation(s)
- Dongyi Wang
- Nanjing University of Chinese Medicine, 210023 Nanjing, China; Department of Integrated Traditional and Western Medicine, Jinling Hospital, School of Medicine, Nanjing University, 210002 Nanjing, China
| | - Fan Yang
- Nanjing University of Chinese Medicine, 210023 Nanjing, China; Department of Integrated Traditional and Western Medicine, Jinling Hospital, School of Medicine, Nanjing University, 210002 Nanjing, China
| | - Wei Shang
- Department of Integrated Traditional and Western Medicine, Jinling Hospital, School of Medicine, Nanjing University, 210002 Nanjing, China
| | - Zhiming Zhao
- Department of Integrated Traditional and Western Medicine, Jinling Hospital, School of Medicine, Nanjing University, 210002 Nanjing, China
| | - Junyi Shen
- Department of Integrated Traditional and Western Medicine, Jinling Hospital, School of Medicine, Nanjing University, 210002 Nanjing, China
| | - Hui Cai
- Nanjing University of Chinese Medicine, 210023 Nanjing, China; Department of Integrated Traditional and Western Medicine, Jinling Hospital, School of Medicine, Nanjing University, 210002 Nanjing, China.
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10
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Tian L, Zhao JL, Kang JQ, Guo SB, Zhang N, Shang L, Zhang YL, Zhang J, Jiang X, Lin Y. Astragaloside IV Alleviates the Experimental DSS-Induced Colitis by Remodeling Macrophage Polarization Through STAT Signaling. Front Immunol 2021; 12:740565. [PMID: 34589089 PMCID: PMC8473681 DOI: 10.3389/fimmu.2021.740565] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 08/26/2021] [Indexed: 12/24/2022] Open
Abstract
Inflammatory bowel disease (IBD) is characterized by chronic and relapsing intestinal inflammation, which currently lacks safe and effective medicine. Some previous studies indicated that Astragaloside IV (AS-IV), a natural saponin extracted from the traditional Chinese medicine herb Ligusticum chuanxiong, alleviates the experimental colitis symptoms in vitro and in vivo. However, the mechanism of AS-IV on IBD remains unclear. Accumulating evidence suggests that M2-polarized intestinal macrophages play a pivotal role in IBD progression. Here, we found that AS-IV attenuated clinical activity of DSS-induced colitis that mimics human IBD and resulted in the phenotypic transition of macrophages from immature pro-inflammatory macrophages to mature pro-resolving macrophages. In vitro, the phenotype changes of macrophages were observed by qRT-PCR after bone marrow-derived macrophages (BMDMs) were induced to M1/M2 and incubated with AS-IV, respectively. In addition, AS-IV was effective in inhibiting pro-inflammatory macrophages and promoting the pro-resolving macrophages to ameliorate experimental colitis via the regulation of the STAT signaling pathway. Hence, we propose that AS-IV can ameliorate experimental colitis partially by modulating macrophage phenotype by remodeling the STAT signaling, which seems to have an essential function in the ability of AS-IV to alleviate the pathological progress of IBD.
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Affiliation(s)
- Lianlian Tian
- Department of Pediatrics, Tangdu Hospital, Air Force Medical University, Xi'an, China
| | - Jun-Long Zhao
- State Key Laboratory of Cancer Biology, Department of Medical Genetics and Developmental Biology, Air Force Medical University, Xi'an, China
| | - Jian-Qin Kang
- Department of Pediatrics, Tangdu Hospital, Air Force Medical University, Xi'an, China
| | - Shi-Bo Guo
- Department of Pediatrics, Tangdu Hospital, Air Force Medical University, Xi'an, China
| | - Nini Zhang
- Department of Pediatrics, Tangdu Hospital, Air Force Medical University, Xi'an, China
| | - Lei Shang
- Department of Health Statistics and Ministry of Education, Key Laboratory of Hazard Assessment and Control in Special Operational Environment, Air Force Medical University, Xi'an, China
| | - Ya-Long Zhang
- Department of Pediatrics, Tangdu Hospital, Air Force Medical University, Xi'an, China
| | - Jian Zhang
- State Key Laboratory of Cancer Biology, Department of Biochemistry and Molecular Biology, Air Force Medical University, Xi'an, China
| | - Xun Jiang
- Department of Pediatrics, Tangdu Hospital, Air Force Medical University, Xi'an, China
| | - Yan Lin
- Department of Pediatrics, Tangdu Hospital, Air Force Medical University, Xi'an, China
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11
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Stolzer I, Dressel A, Chiriac MT, Neurath MF, Günther C. An IFN-STAT Axis Augments Tissue Damage and Inflammation in a Mouse Model of Crohn's Disease. Front Med (Lausanne) 2021; 8:644244. [PMID: 34141714 PMCID: PMC8205542 DOI: 10.3389/fmed.2021.644244] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2020] [Accepted: 04/20/2021] [Indexed: 12/23/2022] Open
Abstract
Blocking interferon-function by therapeutic intervention of the JAK-STAT-axis is a novel promising treatment option for inflammatory bowel disease (IBD). Although JAK inhibitors have proven efficacy in patients with active ulcerative colitis (UC), they failed to induce clinical remission in patients with Crohn's disease (CD). This finding strongly implicates a differential contribution of JAK signaling in both entities. Here, we dissected the contribution of different STAT members downstream of JAK to inflammation and barrier dysfunction in a mouse model of Crohn's disease like ileitis and colitis (Casp8ΔIEC mice). Deletion of STAT1 in Casp8ΔIEC mice was associated with reduced cell death and a partial rescue of Paneth cell function in the small intestine. Likewise, organoids derived from the small intestine of these mice were less sensitive to cell death triggered by IBD-key cytokines such as TNFα or IFNs. Further functional in vitro and in vivo analyses revealed the impairment of MLKL-mediated necrosis as a result of deficient STAT1 function, which was in turn associated with improved cell survival. However, a decrease in inflammatory cell death was still associated with mild inflammation in the small intestine. The impact of STAT1 signaling on gastrointestinal inflammation dependent on the localization of inflammation, as STAT1 is essential for intestinal epithelial cell death regulation in the small intestine, whereas it is not the key factor for intestinal epithelial cell death in the context of colitis. Of note, additional deletion of STAT2 was not sufficient to restore Paneth cell function but strongly ameliorated ileitis. In summary, we provide here compelling molecular evidence that STAT1 and STAT2, both contribute to intestinal homeostasis, but have non-redundant functions. Our results further demonstrate that STATs individually affect the distinct pathophysiology of inflammation in the ileum and colon, respectively, which might explain the diverse outcome of JAK inhibitors on inflammatory bowel diseases.
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Affiliation(s)
- Iris Stolzer
- Medizinische Klinik 1, Universitäts-Klinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Anja Dressel
- Medizinische Klinik 1, Universitäts-Klinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Mircea T Chiriac
- Medizinische Klinik 1, Universitäts-Klinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Markus F Neurath
- Medizinische Klinik 1, Universitäts-Klinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Deutsches Zentrum Immuntherapie, Universitäts-Klinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Claudia Günther
- Medizinische Klinik 1, Universitäts-Klinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
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12
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Abstract
Viruses commonly antagonize the antiviral type I interferon response by targeting signal transducer and activator of transcription 1 (STAT1) and STAT2, key mediators of interferon signaling. Other STAT family members mediate signaling by diverse cytokines important to infection, but their relationship with viruses is more complex. Importantly, virus-STAT interaction can be antagonistic or stimulatory depending on diverse viral and cellular factors. While STAT antagonism can suppress immune pathways, many viruses promote activation of specific STATs to support viral gene expression and/or produce cellular conditions conducive to infection. It is also becoming increasingly clear that viruses can hijack noncanonical STAT functions to benefit infection. For a number of viruses, STAT function is dynamically modulated through infection as requirements for replication change. Given the critical role of STATs in infection by diverse viruses, the virus-STAT interface is an attractive target for the development of antivirals and live-attenuated viral vaccines. Here, we review current understanding of the complex and dynamic virus-STAT interface and discuss how this relationship might be harnessed for medical applications.
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13
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Piber D, Olmstead R, Cho JHJ, Witarama T, Perez C, Dietz N, Seeman TE, Breen EC, Cole SW, Irwin MR. Inflammaging: Age and Systemic, Cellular, and Nuclear Inflammatory Biology in Older Adults. J Gerontol A Biol Sci Med Sci 2020; 74:1716-1724. [PMID: 31107949 DOI: 10.1093/gerona/glz130] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Indexed: 12/31/2022] Open
Abstract
Systemic inflammation is associated with increasing age. Yet, there are limited data about the association between age and systemic inflammation within older adults, and whether older age is also associated with cellular and nuclear signaling markers of inflammation. In community-dwelling older adults (N = 262, 60-88 years), systemic levels of C-reactive protein, interleukin-6, and soluble tumor necrosis factor receptor II; levels of toll-like receptor-4-stimulated monocytic production of interleukin-6 and tumor necrosis factor α; and resting nuclear levels of activated nuclear factor kappa B and signal transducer and activator of transcription (STAT1, STAT3, STAT5) were evaluated. Adjusting for demographic and clinical factors, multivariate linear regression tested the association between age and each inflammatory marker. Age was positively associated with increased levels of interleukin-6 and soluble tumor necrosis factor receptor II (p's < .05) and with increases in STAT1, STAT3, and STAT5 activation (p's < .05). However, no relationship was found between age and C-reactive protein, toll-like receptor-4-stimulated interleukin-6/tumor necrosis factor alpha α production, or nuclear factor kappa B. Within a community-dwelling sample of older adults, older age is associated with increases in STAT activation, along with increases of systemic inflammatory cytokines. In older adults, heterogeneity in age-related increases in inflammatory disease risk may be related to individual variability in inflammation.
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Affiliation(s)
- Dominique Piber
- Cousins Center for Psychoneuroimmunology, Semel Institute for Neuroscience and Human Behavior, Department of Psychiatry and Biobehavioral Sciences, David Geffen School of Medicine, University of California, Los Angeles.,Department of Psychiatry, Charité-Universitätsmedizin Berlin, Germany
| | - Richard Olmstead
- Cousins Center for Psychoneuroimmunology, Semel Institute for Neuroscience and Human Behavior, Department of Psychiatry and Biobehavioral Sciences, David Geffen School of Medicine, University of California, Los Angeles
| | - Joshua Hyong-Jin Cho
- Cousins Center for Psychoneuroimmunology, Semel Institute for Neuroscience and Human Behavior, Department of Psychiatry and Biobehavioral Sciences, David Geffen School of Medicine, University of California, Los Angeles
| | - Tuff Witarama
- Cousins Center for Psychoneuroimmunology, Semel Institute for Neuroscience and Human Behavior, Department of Psychiatry and Biobehavioral Sciences, David Geffen School of Medicine, University of California, Los Angeles
| | - Christian Perez
- Cousins Center for Psychoneuroimmunology, Semel Institute for Neuroscience and Human Behavior, Department of Psychiatry and Biobehavioral Sciences, David Geffen School of Medicine, University of California, Los Angeles
| | - Nicholas Dietz
- Cousins Center for Psychoneuroimmunology, Semel Institute for Neuroscience and Human Behavior, Department of Psychiatry and Biobehavioral Sciences, David Geffen School of Medicine, University of California, Los Angeles
| | - Teresa E Seeman
- Division of Geriatrics, David Geffen School of Medicine, University of California, Los Angeles
| | - Elizabeth C Breen
- Cousins Center for Psychoneuroimmunology, Semel Institute for Neuroscience and Human Behavior, Department of Psychiatry and Biobehavioral Sciences, David Geffen School of Medicine, University of California, Los Angeles
| | - Steve W Cole
- Cousins Center for Psychoneuroimmunology, Semel Institute for Neuroscience and Human Behavior, Department of Psychiatry and Biobehavioral Sciences, David Geffen School of Medicine, University of California, Los Angeles
| | - Michael R Irwin
- Cousins Center for Psychoneuroimmunology, Semel Institute for Neuroscience and Human Behavior, Department of Psychiatry and Biobehavioral Sciences, David Geffen School of Medicine, University of California, Los Angeles
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14
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Scott ML, Woodby BL, Ulicny J, Raikhy G, Orr AW, Songock WK, Bodily JM. Human Papillomavirus 16 E5 Inhibits Interferon Signaling and Supports Episomal Viral Maintenance. J Virol 2020; 94:e01582-19. [PMID: 31666385 DOI: 10.1128/JVI.01582-19] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 10/23/2019] [Indexed: 02/07/2023] Open
Abstract
Human papillomaviruses (HPVs) infect keratinocytes of stratified epithelia. Long-term persistence of infection is a critical risk factor for the development of HPV-induced malignancies. Through the actions of its oncogenes, HPV evades host immune responses to facilitate its productive life cycle. In this work, we discovered a previously unknown function of the HPV16 E5 oncoprotein in the suppression of interferon (IFN) responses. This suppression is focused on keratinocyte-specific IFN-κ and is mediated through E5-induced changes in growth factor signaling pathways, as identified through phosphoproteomics analysis. The loss of E5 in keratinocytes maintaining the complete HPV16 genome results in the derepression of IFNK transcription and subsequent JAK/STAT-dependent upregulation of several IFN-stimulated genes (ISGs) at both the mRNA and protein levels. We also established a link between the loss of E5 and the subsequent loss of genome maintenance and stability, resulting in increased genome integration.IMPORTANCE Persistent human papillomavirus infections can cause a variety of significant cancers. The ability of HPV to persist depends on evasion of the host immune system. In this study, we show that the HPV16 E5 protein can suppress an important aspect of the host immune response. In addition, we find that the E5 protein is important for helping the virus avoid integration into the host genome, which is a frequent step along the pathway to cancer development.
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15
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Zhao M, Xiong X, Ren K, Xu B, Cheng M, Sahu C, Wu K, Nie Y, Huang Z, Blumberg RS, Han X, Ruan HB. Deficiency in intestinal epithelial O-GlcNAcylation predisposes to gut inflammation. EMBO Mol Med 2019; 10:emmm.201708736. [PMID: 29941542 PMCID: PMC6079539 DOI: 10.15252/emmm.201708736] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Post-translational modifications in intestinal epithelial cells (IECs) allow for precise control in intestinal homeostasis, the breakdown of which may precipitate the pathological damage and inflammation in inflammatory bowel disease. The O-linked β-N-acetylglucosamine (O-GlcNAc) modification on intracellular proteins controls diverse biological processes; however, its roles in intestinal homeostasis are still largely unexplored. Here, we found that levels of protein O-GlcNAcylation and the expression of O-GlcNAc transferase (OGT), the enzyme adding the O-GlcNAc moiety, were reduced in IECs in human IBD patients. Deletion of OGT specifically in IECs resulted in disrupted epithelial barrier, microbial dysbiosis, Paneth cell dysfunction, and intestinal inflammation in mice. Using fecal microbiota transplantation in mice, we demonstrated that microbial dysbiosis although was insufficient to induce spontaneous inflammation but exacerbated chemical-induced colitis. Paneth cell-specific deletion of OGT led to Paneth cell dysfunction, which might predispose mice to chemical-induced colitis. On the other hand, the augmentation of O-GlcNAc signaling by inhibiting O-GlcNAcase, the enzyme removing O-GlcNAcylation, alleviated chemical-induced colitis. Our data reveal that protein O-GlcNAcylation in IECs controls key regulatory mechanisms to maintain mucosal homeostasis.
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Affiliation(s)
- Ming Zhao
- School of Forensic Medicine, Xinxiang Medical University, Xinxiang, Henan, China.,Department of Integrative Biology and Physiology, University of Minnesota Medical School, Minneapolis, MN, USA
| | - Xiwen Xiong
- School of Forensic Medicine, Xinxiang Medical University, Xinxiang, Henan, China
| | - Kaiqun Ren
- Department of Integrative Biology and Physiology, University of Minnesota Medical School, Minneapolis, MN, USA.,College of Medicine, Hunan Normal University, Changsha, Hunan, China
| | - Bing Xu
- State Key Laboratory of Cancer Biology & Institute of Digestive Diseases, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Meng Cheng
- Department of Integrative Biology and Physiology, University of Minnesota Medical School, Minneapolis, MN, USA
| | - Chinmayi Sahu
- Department of Integrative Biology and Physiology, University of Minnesota Medical School, Minneapolis, MN, USA
| | - Kaichun Wu
- State Key Laboratory of Cancer Biology & Institute of Digestive Diseases, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Yongzhan Nie
- State Key Laboratory of Cancer Biology & Institute of Digestive Diseases, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Zan Huang
- Department of Integrative Biology and Physiology, University of Minnesota Medical School, Minneapolis, MN, USA.,Laboratory of Gastrointestinal Microbiology, Jiangsu Key Laboratory of Gastrointestinal Nutrition and Animal Health, College of Animal Science and Technology, Nanjing Agriculture University, Nanjing, Jiangsu, China.,National Center for International Research on Animal Gut Nutrition, Nanjing Agriculture University, Nanjing, Jiangsu, China
| | - Richard S Blumberg
- Division of Gastroenterology, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Xiaonan Han
- Division of Gastroenterology, Hepatology, and Nutrition, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.,MOH Key Laboratory of Human Disease Comparative Medicine, Institute of Laboratory Animal Science Chinese Academy of Medical Science (CAMS) and Peking Union Medical College (PUMC), Beijing, China
| | - Hai-Bin Ruan
- School of Forensic Medicine, Xinxiang Medical University, Xinxiang, Henan, China .,Department of Integrative Biology and Physiology, University of Minnesota Medical School, Minneapolis, MN, USA
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16
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Göertz GP, McNally KL, Robertson SJ, Best SM, Pijlman GP, Fros JJ. The Methyltransferase-Like Domain of Chikungunya Virus nsP2 Inhibits the Interferon Response by Promoting the Nuclear Export of STAT1. J Virol 2018; 92:e01008-18. [PMID: 29925658 DOI: 10.1128/JVI.01008-18] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 06/14/2018] [Indexed: 12/15/2022] Open
Abstract
Chikungunya virus (CHIKV) is a mosquito-borne alphavirus that has evolved effective mechanisms to counteract the type I interferon (IFN) response. Upon recognition of the virus, cells secrete IFNs, which signal through transmembrane receptors (IFNAR) to phosphorylate STAT proteins (pSTAT). pSTAT dimers are transported into the nucleus by importin-α5 and activate the transcription of IFN-stimulated genes (ISGs), increasing cellular resistance to infection. Subsequently, STAT proteins are shuttled back into the cytoplasm by the exportin CRM1. CHIKV nonstructural protein 2 (nsP2) reduces ISG expression by inhibiting general host cell transcription and by specifically reducing the levels of nuclear pSTAT1 via an unknown mechanism. To systematically examine where nsP2 acts within the JAK/STAT signaling cascade, we used two well-characterized mutants of nsP2, P718S and KR649AA. Both mutations abrogate nsP2's ability to shut off host transcription, but only the KR649AA mutant localizes exclusively to the cytoplasm and no longer specifically inhibits JAK/STAT signaling. These mutant nsP2 proteins did not differentially affect IFNAR expression levels or STAT1 phosphorylation in response to IFNs. Coimmunoprecipitation experiments showed that in the presence of nsP2, STAT1 still effectively bound importin-α5. Chemically blocking CRM1-mediated nuclear export in the presence of nsP2 additionally showed that nuclear translocation of STAT1 is not affected by nsP2. nsP2 putatively has five domains. Redirecting the nsP2 KR649AA mutant or just nsP2's C-terminal methyltransferase-like domain into the nucleus strongly reduced nuclear pSTAT in response to IFN stimulation. This demonstrates that the C-terminal domain of nuclear nsP2 specifically inhibits the IFN response by promoting the nuclear export of STAT1.IMPORTANCE Chikungunya virus is an emerging pathogen associated with large outbreaks on the African, Asian, European, and both American continents. In most patients, infection results in high fever, rash, and incapacitating (chronic) arthralgia. CHIKV effectively inhibits the first line of defense, the innate immune response. As a result, stimulation of the innate immune response with interferons (IFNs) is ineffective as a treatment for CHIKV disease. The IFN response requires an intact downstream signaling cascade called the JAK/STAT signaling pathway, which is effectively inhibited by CHIKV nonstructural protein 2 (nsP2) via an unknown mechanism. The research described here specifies where in the JAK/STAT signaling cascade the IFN response is inhibited and which protein domain of nsP2 is responsible for IFN inhibition. The results illuminate new aspects of antiviral defense and CHIKV counterdefense strategies and will direct the search for novel antiviral compounds.
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17
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Banerjee P, Malik A, Malhotra SS, Gupta SK. Role of STAT signaling and autocrine action of chemokines during H 2 O 2 induced HTR-8/SVneo trophoblastic cells invasion. J Cell Physiol 2018; 234:1380-1397. [PMID: 30078219 DOI: 10.1002/jcp.26934] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 06/13/2018] [Indexed: 01/20/2023]
Abstract
During pregnancy, regulated generation of reactive oxygen species (ROS) is important for activation of signaling pathways and placentation. In the current study, the effect of H2 O2 on invasion of HTR-8/SVneo cells, a human extravillous trophoblast cell line, is investigated. Treatment of HTR-8/SVneo cells for 24 hr with H 2 O2 (25 µM) leads to a significant increase in invasion without affecting cell proliferation, viability, and apoptosis. Concomitantly, a significant increase in the matrix metalloproteinase-9 (MMP-9)/tissue inhibitor of metalloproteinases-1 (TIMP-1) ratio is observed. Further, significant increase in phosphorylation of signal transducer and activator of transcription 1 (STAT-1) and STAT-3 (both at ser727 residue) is observed on treating HTR-8/SVneo cells with 25 µM of H2 O2 accompanied by an increase in the secretion of interleukin-8 (IL-8) and macrophage inflammatory protein-1β (MIP-1β). A significant decrease in H2 O2 -mediated invasion of HTR-8/SVneo cells and reduced expression of IL-8 and MIP-1β accompanied by decrease in MMP-9/TIMP-1 ratio are observed on inhibiting STAT-1 and STAT-3 by small interfering RNA (siRNA). Inhibition of STAT-1 activity by fludarabine and STAT-3 activity by Stattic also leads to a decrease in H2 O2 -mediated increase in HTR-8/SVneo cell invasion. Inhibition of IL-8 and MIP-1β by siRNA also leads to a significant decrease in both basal and H2 O2 -mediated invasion. Interestingly, inhibition of MIP-1β by siRNA leads to a significant reduction in H2 O2 -mediated increase in IL-8. However, no significant effect of IL-8 silencing on H2 O2 -mediated MIP-1β expression was observed. From the above results, it can be concluded that H2 O2 activates STAT signaling, MIP-1β & IL-8 secretion and increases MMP-9/TIMP-1 ratio leading to an increased invasion of HTR-8/SVneo cells without affecting their viability.
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Affiliation(s)
- Priyanka Banerjee
- Reproductive Cell Biology Laboratory, National Institute of Immunology, New Delhi, India
| | - Ankita Malik
- Reproductive Cell Biology Laboratory, National Institute of Immunology, New Delhi, India
| | - Sudha Saryu Malhotra
- Reproductive Cell Biology Laboratory, National Institute of Immunology, New Delhi, India
| | - Satish Kumar Gupta
- Reproductive Cell Biology Laboratory, National Institute of Immunology, New Delhi, India
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18
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Bruno A, Bassani B, D'Urso DG, Pitaku I, Cassinotti E, Pelosi G, Boni L, Dominioni L, Noonan DM, Mortara L, Albini A. Angiogenin and the MMP9-TIMP2 axis are up-regulated in proangiogenic, decidual NK-like cells from patients with colorectal cancer. FASEB J 2018; 32:5365-5377. [PMID: 29763380 DOI: 10.1096/fj.201701103r] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
NK cells are effector lymphocytes involved in tumor immunosurveillance; however, in patients with solid malignancies, NK cells have compromised functions. We have previously reported that lung tumor-associated NK cells (TANKs; peripheral blood) and tumor-infiltrating NK cells (TINKs) show proangiogenic, decidual NK-like (dNK) phenotype. In this study, we functionally and molecularly investigated TINKs and TANKs from blood and tissue samples of patients with colorectal cancer (CRC), a neoplasm in which inflammation and angiogenesis have clinical relevance, and compared them to NK cells from controls and patients with nononcologic inflammatory bowel disease. CRC TINKs/TANKs showed decreased expression for the activatory marker NKG2D, impaired degranulation activity, a decidual-like NK polarization toward the CD56brightCD16dim/-CD9+CD49+ subset. TINKs and TANKs secreted cytokines with proangiogenic activities, and induce endothelial cell proliferation, migration, adhesion, and the formation of capillary-like structures in vitro. dNK cells release specific proangiogenic factors; among which, angiogenin and invasion-associated enzymes related to the MMP9-TIMP1/2 axis. Here, we describe, for the first time, to our knowledge, the expression of angiogenin, MMP2/9, and TIMP by TANKs in patients with CRC. This phenotype could be relevant to the invasive capabilities and proangiogenic functions of CRC-NK cells and become a novel biomarker. STAT3/STAT5 activation was observed in CRC-TANKs, and treatment with pimozide, a STAT5 inhibitor, reduced endothelial cell capability to form capillary-like networks, inhibiting VEGF and angiogenin production without affecting the levels of TIMP1, TIMP2, and MMP9, indicating that STAT5 is involved in cytokine modulation but not invasion-associated molecules. Combination of Stat5 or MMP inhibitors with immunotherapy could help repolarize CRC TINKs and TANKs to anti-tumor antimetastatic ones.-Bruno, A., Bassani, B., D'Urso, D. G., Pitaku, I., Cassinotti, E., Pelosi, G., Boni, L., Dominioni, L., Noonan, D. M., Mortara, L., Albini, A. Angiogenin and the MMP9-TIMP2 axis are up-regulated in proangiogenic, decidual NK-like cells from patients with colorectal cancer.
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Affiliation(s)
- Antonino Bruno
- Vascular Biology and Angiogenesis Laboratory, Science and Technology Pole (PST), Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) MultiMedica, Milan, Italy
| | - Barbara Bassani
- Vascular Biology and Angiogenesis Laboratory, Science and Technology Pole (PST), Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) MultiMedica, Milan, Italy
| | - Davide Giuseppe D'Urso
- Vascular Biology and Angiogenesis Laboratory, Science and Technology Pole (PST), Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) MultiMedica, Milan, Italy
| | - Ilvana Pitaku
- Department of Surgical and Morphological Sciences, University of Insubria, Varese, Italy
| | - Elisa Cassinotti
- Department of Surgical and Morphological Sciences, University of Insubria, Varese, Italy
| | - Giuseppe Pelosi
- Department of Oncology and Hemato-Oncology, University of Milan, Milan, Italy
| | - Luigi Boni
- Department of Medical-Surgical Physiopathology and Transplantation, University of Milan-Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Ca' Granda, Polyclinic Hospital, Milan, Italy
| | - Lorenzo Dominioni
- Department of Surgical and Morphological Sciences, University of Insubria, Varese, Italy
| | - Douglas M Noonan
- Vascular Biology and Angiogenesis Laboratory, Science and Technology Pole (PST), Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) MultiMedica, Milan, Italy.,Department of Biotechnology and Life Sciences, University of Insubria, Varese, Italy; and
| | - Lorenzo Mortara
- Department of Biotechnology and Life Sciences, University of Insubria, Varese, Italy; and
| | - Adriana Albini
- Vascular Biology and Angiogenesis Laboratory, Science and Technology Pole (PST), Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) MultiMedica, Milan, Italy.,Department of Medicine and Surgery, University Milano-Bicocca, Monza, Italy
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19
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Muraoka D, Seo N, Hayashi T, Hyuga-Amaike C, Okamori K, Tawara I, Harada N, Shiku H. Signal-transducing adaptor protein-2 promotes generation of functional long-term memory CD8+ T cells by preventing terminal effector differentiation. Oncotarget 2018; 8:30766-30780. [PMID: 28430604 PMCID: PMC5458166 DOI: 10.18632/oncotarget.15403] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Accepted: 02/01/2017] [Indexed: 02/06/2023] Open
Abstract
Long-surviving memory CD8+ T cells generated by stimulation with appropriate tumor-associated antigens are the most aggressive and persistent tumoricidal effectors. In this event of memory CD8+ T cell development, the signal transducer and activator of transcription (STAT) proteins function as the crucial intracellular signaling molecules, but the regulatory mechanism of STATs in CD8+ T cells is not fully understood. In this study, we report for the first time, by using murine vaccination models, that signal-transducing adaptor protein-2 (STAP2) maintains the cytotoxicity of long-lived memory CD8+ T cells by controlling a STAT3/suppressor of cytokine signaling 3 (SOCS3) cascade. Following T cell activation, STAP2 expression was transiently reduced but was subsequently recovered and augmented. Analysis using small-interfering RNA (siRNA) demonstrated that restored STAP2 expression was associated with the activation of STAT3/SOCS3 signals and maintenance of cytotoxic T lymphocytes (CTLs) secondary responses by preventing their differentiation into terminal effector cells. Notably, this STAP2-dependent memory differentiation was observed in the spleen, but not in the lymph nodes (LNs). These findings indicate an essential role for STAP2 in the generation of a high-quality memory CD8+ CTLs periphery, and suggest the therapeutic potential of STAP2 in cancer patients.
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Affiliation(s)
- Daisuke Muraoka
- Department of Immuno-Gene Therapy, Mie University Graduate School of Medicine, Mie, Japan.,Center for Drug Discovery, Graduate School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, Japan
| | - Naohiro Seo
- Department of Immuno-Gene Therapy, Mie University Graduate School of Medicine, Mie, Japan
| | - Tae Hayashi
- Department of Immuno-Gene Therapy, Mie University Graduate School of Medicine, Mie, Japan
| | - Chisaki Hyuga-Amaike
- Department of Immuno-Gene Therapy, Mie University Graduate School of Medicine, Mie, Japan
| | - Kana Okamori
- Department of Immuno-Gene Therapy, Mie University Graduate School of Medicine, Mie, Japan
| | - Isao Tawara
- Department of Hematology and Oncology, Mie University Graduate School of Medicine, Mie, Japan
| | - Naozumi Harada
- Department of Immuno-Gene Therapy, Mie University Graduate School of Medicine, Mie, Japan
| | - Hiroshi Shiku
- Department of Immuno-Gene Therapy, Mie University Graduate School of Medicine, Mie, Japan
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20
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Heppler LN, Frank DA. Targeting Oncogenic Transcription Factors: Therapeutic Implications of Endogenous STAT Inhibitors. Trends Cancer 2017; 3:816-827. [PMID: 29198438 DOI: 10.1016/j.trecan.2017.10.004] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Revised: 10/10/2017] [Accepted: 10/11/2017] [Indexed: 02/07/2023]
Abstract
Misregulation of transcription factors, including signal transducer and activator of transcription (STAT) proteins, leads to inappropriate gene expression patterns that can promote tumor initiation and progression. Under physiologic conditions, STAT signaling is stimulus dependent and tightly regulated by endogenous inhibitors, namely, suppressor of cytokine signaling (SOCS) proteins, phosphatases, and protein inhibitor of activated STAT (PIAS) proteins. However, in tumorigenesis, STAT proteins become constitutively active and promote the expression of progrowth and prosurvival genes. Although STAT activation has been widely implicated in cancer, therapeutic STAT inhibitors are still largely absent from the clinic. This review dissects the mechanisms of action of two families of endogenous STAT inhibitors, the SOCS and PIAS families, to potentially inform the development of novel therapeutic inhibitors.
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Affiliation(s)
- Lisa N Heppler
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA; Departments of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - David A Frank
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA; Departments of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA.
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21
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Radhakrishnan H, Ilm K, Walther W, Shirasawa S, Sasazuki T, Daniel PT, Gillissen B, Stein U. MACC1 regulates Fas mediated apoptosis through STAT1/3 - Mcl-1 signaling in solid cancers. Cancer Lett 2017. [PMID: 28649004 DOI: 10.1016/j.canlet.2017.06.020] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
MACC1 was identified as a novel player in cancer progression and metastasis, but its role in death receptor-mediated apoptosis is still unexplored. We show that MACC1 knockdown sensitizes cancer cells to death receptor-mediated apoptosis. For the first time, we provide evidence for STAT signaling as a MACC1 target. MACC1 knockdown drastically reduced STAT1/3 activating phosphorylation, thereby regulating the expression of its apoptosis targets Mcl-1 and Fas. STAT signaling inhibition by the JAK1/2 inhibitor ruxolitinib mimicked MACC1 knockdown-mediated molecular signatures and apoptosis sensitization to Fas activation. Despite the increased Fas expression, the reduced Mcl-1 expression was instrumental in apoptosis sensitization. This reduced Mcl-1-mediated apoptosis sensitization was Bax and Bak dependent. MACC1 knockdown also increased TRAIL-induced apoptosis. MACC1 overexpression enhanced STAT1/3 phosphorylation and increased Mcl-1 expression, which was abrogated by ruxolitinib. The central role of Mcl-1 was strengthened by the resistance of Mcl-1 overexpressing cells to apoptosis induction. The clinical relevance of Mcl-1 regulation by MACC1 was supported by their positive expression correlation in patient-derived tumors. Altogether, we reveal a novel death receptor-mediated apoptosis regulatory mechanism by MACC1 in solid cancers through modulation of the STAT1/3-Mcl-1 axis.
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Affiliation(s)
- Harikrishnan Radhakrishnan
- Translational Oncology of Solid Tumors, Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin, Max-Delbrück-Center for Molecular Medicine, Berlin, Germany; Berlin School of Integrative Oncology, Charité - Universitätsmedizin Berlin, Germany
| | - Katharina Ilm
- Translational Oncology of Solid Tumors, Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin, Max-Delbrück-Center for Molecular Medicine, Berlin, Germany
| | - Wolfgang Walther
- Translational Oncology of Solid Tumors, Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin, Max-Delbrück-Center for Molecular Medicine, Berlin, Germany
| | - Senji Shirasawa
- Department of Cell Biology, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | | | - Peter T Daniel
- Clinical and Molecular Oncology, Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin, Max-Delbrück-Center for Molecular Medicine, Berlin, Germany
| | - Bernhard Gillissen
- Clinical and Molecular Oncology, Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin, Max-Delbrück-Center for Molecular Medicine, Berlin, Germany
| | - Ulrike Stein
- Translational Oncology of Solid Tumors, Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin, Max-Delbrück-Center for Molecular Medicine, Berlin, Germany; German Cancer Consortium (DKTK), Heidelberg, Germany.
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22
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Tanguy M, Véron L, Stempor P, Ahringer J, Sarkies P, Miska EA. An Alternative STAT Signaling Pathway Acts in Viral Immunity in Caenorhabditis elegans. mBio 2017; 8:e00924-17. [PMID: 28874466 PMCID: PMC5587905 DOI: 10.1128/mbio.00924-17] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Accepted: 08/02/2017] [Indexed: 01/01/2023] Open
Abstract
Across metazoans, innate immunity is vital in defending organisms against viral infection. In mammals, antiviral innate immunity is orchestrated by interferon signaling, activating the STAT transcription factors downstream of the JAK kinases to induce expression of antiviral effector genes. In the nematode Caenorhabditis elegans, which lacks the interferon system, the major antiviral response so far described is RNA interference (RNAi), but whether additional gene expression responses are employed is not known. Here we show that, despite the absence of both interferon and JAK, the C. elegans STAT homolog STA-1 orchestrates antiviral immunity. Intriguingly, mutants lacking STA-1 are less permissive to antiviral infection. Using gene expression analysis and chromatin immunoprecipitation, we show that, in contrast to the mammalian pathway, STA-1 acts mostly as a transcriptional repressor. Thus, STA-1 might act to suppress a constitutive antiviral response in the absence of infection. Additionally, using a reverse genetic screen, we identify the kinase SID-3 as a new component of the response to infection, which, along with STA-1, participates in the transcriptional regulatory network of the immune response. Our work uncovers novel physiological roles for two factors in viral infection: a SID protein acting independently of RNAi and a STAT protein acting in C. elegans antiviral immunity. Together, these results illustrate the complex evolutionary trajectory displayed by innate immune signaling pathways across metazoan organisms.IMPORTANCE Since innate immunity was discovered, a diversity of pathways has arisen as powerful first-line defense mechanisms to fight viral infection. RNA interference, reported mostly in invertebrates and plants, as well as the mammalian interferon response and JAK/STAT pathway are key in RNA virus innate immunity. We studied infection by the Orsay virus in Caenorhabditis elegans, where RNAi is known to be a potent antiviral defense. We show that, in addition to its RNAi pathway, C. elegans utilizes an alternative STAT pathway to control the levels of viral infection. We identify the transcription factor STA-1 and the kinase SID-3 as two components of this response. Our study defines C. elegans as a new example of the diversity of antiviral strategies.
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Affiliation(s)
- Mélanie Tanguy
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Cambridge, United Kingdom
- Department of Genetics, University of Cambridge, Cambridge, United Kingdom
| | - Louise Véron
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Cambridge, United Kingdom
- École Normale Supérieure de Cachan, Université Paris-Saclay, Saclay, France
| | - Przemyslaw Stempor
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Cambridge, United Kingdom
- Department of Genetics, University of Cambridge, Cambridge, United Kingdom
| | - Julie Ahringer
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Cambridge, United Kingdom
- Department of Genetics, University of Cambridge, Cambridge, United Kingdom
| | - Peter Sarkies
- MRC London Institute of Medical Sciences, London, United Kingdom
- Institute for Clinical Sciences, Imperial College London, United Kingdom
| | - Eric A Miska
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Cambridge, United Kingdom
- Department of Genetics, University of Cambridge, Cambridge, United Kingdom
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23
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Hato SV, Figdor CG, Takahashi S, Pen AE, Halilovic A, Bol KF, Vasaturo A, Inoue Y, de Haas N, Verweij D, Van Herpen CML, Kaanders JH, van Krieken JHJM, Van Laarhoven HWM, Hooijer GKJ, Punt CJA, Asai A, de Vries IJM, Lesterhuis WJ. Direct inhibition of STAT signaling by platinum drugs contributes to their anti-cancer activity. Oncotarget 2017; 8:54434-54443. [PMID: 28903353 PMCID: PMC5589592 DOI: 10.18632/oncotarget.17661] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Accepted: 04/22/2017] [Indexed: 01/05/2023] Open
Abstract
Platinum-based chemotherapeutics are amongst the most powerful anti-cancer drugs. Although their exact mechanism of action is not well understood, it is thought to be mediated through covalent DNA binding. We investigated the effect of platinum-based chemotherapeutics on signaling through signal transducer and activator of transcription (STAT) proteins, which are involved in many oncogenic signaling pathways. We performed in vitro experiments in various cancer cell lines, investigating the effects of platinum chemotherapeutics on STAT phosphorylation and nuclear translocation, the expression of STAT-modulating proteins and downstream signaling pathways. Direct binding of platinum to STAT proteins was assessed using an AlphaScreen assay. Nuclear STAT3 expression was determined by immunohistochemistry and correlated with disease-free survival in retrospective cohorts of head and neck squamous cell carcinoma (HNSCC) patients treated with cisplatin-based chemoradiotherapy (n= 65) or with radiotherapy alone (n = 32). At clinically relevant concentrations, platinum compounds inhibited STAT phosphorylation, resulting in loss of constitutively activated STAT proteins in multiple distinct cancer cell lines. Platinum drugs specifically inhibited phospho-tyrosine binding to SH2 domains, thereby blocking STAT activation, and subsequently downregulating pro-survival- and anti-apoptotic- target genes. Importantly, we found that active STAT3 in tumors directly correlated with response to cisplatin-based chemoradiotherapy in HNSCC patients (p = 0.006). These findings provide insight into a novel, non-DNA-targeted mechanism of action of platinum drugs, and could be leveraged into the use of STAT expression as predictive biomarker for cisplatin chemotherapy and to potentiate other therapeutic strategies such as immunotherapy.
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Affiliation(s)
- Stanleyson V Hato
- Department of Tumor Immunology, Radboud University Medical Centre and Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
| | - Carl G Figdor
- Department of Tumor Immunology, Radboud University Medical Centre and Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
| | - Susumu Takahashi
- Center for Drug Discovery, Graduate School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, Japan
| | - Anja E Pen
- Department of Tumor Immunology, Radboud University Medical Centre and Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
| | - Altuna Halilovic
- Department of Pathology, Radboud University Medical Centre and Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
| | - Kalijn F Bol
- Department of Tumor Immunology, Radboud University Medical Centre and Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands.,Department of Medical Oncology, Radboud University Medical Centre and Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
| | - Angela Vasaturo
- Department of Tumor Immunology, Radboud University Medical Centre and Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
| | - Yukie Inoue
- Center for Drug Discovery, Graduate School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, Japan
| | - Nienke de Haas
- Department of Tumor Immunology, Radboud University Medical Centre and Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
| | - Dagmar Verweij
- Department of Pathology, Radboud University Medical Centre and Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
| | - Carla M L Van Herpen
- Department of Medical Oncology, Radboud University Medical Centre and Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
| | - Johannes H Kaanders
- Department of Radiation Oncology, Radboud University Medical Centre and Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
| | - Johan H J M van Krieken
- Department of Pathology, Radboud University Medical Centre and Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
| | - Hanneke W M Van Laarhoven
- Department of Medical Oncology, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
| | - Gerrit K J Hooijer
- Department of Medical Oncology, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
| | - Cornelis J A Punt
- Department of Medical Oncology, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
| | - Akira Asai
- Center for Drug Discovery, Graduate School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, Japan
| | - I Jolanda M de Vries
- Department of Tumor Immunology, Radboud University Medical Centre and Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands.,Department of Medical Oncology, Radboud University Medical Centre and Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
| | - W Joost Lesterhuis
- Department of Tumor Immunology, Radboud University Medical Centre and Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands.,Department of Medical Oncology, Radboud University Medical Centre and Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands.,Current address: University of Western Australia, School of Medicine and Pharmacology, Perth, Australia
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24
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de Haas N, de Koning C, Spilgies L, de Vries IJM, Hato SV. Improving cancer immunotherapy by targeting the STATe of MDSCs. Oncoimmunology 2016; 5:e1196312. [PMID: 27622051 PMCID: PMC5006927 DOI: 10.1080/2162402x.2016.1196312] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 05/26/2016] [Accepted: 05/27/2016] [Indexed: 01/01/2023] Open
Abstract
Cancer immunotherapy is a promising therapeutic avenue; however, in practice its efficacy is hampered by an immunosuppressive tumor microenvironment that consists of suppressive cell types like myeloid-derived suppressor cells (MDSCs). Eradication or reprogramming of MDSCs could therefore enhance clinical responses to immunotherapy. Here, we review clinically available drugs that target MDSCs, often through inhibition of STAT signaling, which is essential for MDSC accumulation and suppressive functions. Interestingly, several drugs used for non-cancerous indications and natural compounds similarly inhibit MDSCs by STAT inhibition, but have fewer side effects than anticancer drugs. Therefore, they show great potential for combination strategies with immunotherapy.
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Affiliation(s)
- Nienke de Haas
- Department of Tumor Immunology, Institute for Molecular Life Sciences, Radboud university medical center , Nijmegen, The Netherlands
| | - Coco de Koning
- Department of Tumor Immunology, Institute for Molecular Life Sciences, Radboud university medical center , Nijmegen, The Netherlands
| | - Lisanne Spilgies
- Department of Tumor Immunology, Institute for Molecular Life Sciences, Radboud university medical center , Nijmegen, The Netherlands
| | - I Jolanda M de Vries
- Department of Tumor Immunology, Institute for Molecular Life Sciences, Radboud university medical center , Nijmegen, The Netherlands
| | - Stanleyson V Hato
- Department of Tumor Immunology, Institute for Molecular Life Sciences, Radboud university medical center , Nijmegen, The Netherlands
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25
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Fantetti KN, Gray EL, Ganesan P, Kulkarni A, O'Donnell LA. Interferon gamma protects neonatal neural stem/progenitor cells during measles virus infection of the brain. J Neuroinflammation 2016; 13:107. [PMID: 27178303 PMCID: PMC4867982 DOI: 10.1186/s12974-016-0571-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Accepted: 05/06/2016] [Indexed: 01/04/2023] Open
Abstract
Background In the developing brain, self-renewing neural stem/progenitor cells (NSPC) give rise to neuronal and glial lineages. NSPC survival and differentiation can be altered by neurotropic viruses and by the anti-viral immune response. Several neurotropic viruses specifically target and infect NSPCs, in addition to inducing neuronal loss, which makes it difficult to distinguish between effects on NSPCs that are due to direct viral infection or due to the anti-viral immune response. Methods We have investigated the impact of anti-viral immunity on NSPCs in measles virus (MV)-infected neonates. A neuron-restricted viral infection model was used, where NSPCs remain uninfected. Thus, an anti-viral immune response was induced without the confounding issue of NSPC infection. Two-transgenic mouse lines were used: CD46+ mice express the human isoform of CD46, the MV entry receptor, under the control of the neuron-specific enolase promoter; CD46+/IFNγ-KO mice lack the key anti-viral cytokine IFNγ. Multi-color flow cytometry and Western Blot analysis were used to quantify effects on NSPC, neuronal, and glial cell number, and quantify effects on IFNγ-mediated signaling and cell markers, respectively. Results Flow cytometric analysis revealed that NSPCs were reduced in CD46+/IFNγ-KO mice at 3, 7, and 10 days post-infection (dpi), but were unaffected in CD46+ mice. Early neurons showed the greatest cell loss at 7 dpi in both genotypes, with no effect on mature neurons and glial cells. Thus, IFNγ protected against NSPC loss, but did not protect young neurons. Western Blot analyses on hippocampal explants showed reduced nestin expression in the absence of IFNγ, and reduced doublecortin and βIII-tubulin in both genotypes. Phosphorylation of STAT1 and STAT2 occurred independently of IFNγ in the hippocampus, albeit with distinct regulation of activation. Conclusions This is the first study to demonstrate bystander effects of anti-viral immunity on NSPC function. Our results show IFNγ protects the NSPC population during a neonatal viral CNS infection. Significant loss of NSPCs in CD46+/IFNγ-KO neonates suggests that the adaptive immune response is detrimental to NSPCs in the absence of IFNγ. These results reveal the importance and contribution of the anti-viral immune response to neuropathology and may be relevant to other neuroinflammatory conditions. Electronic supplementary material The online version of this article (doi:10.1186/s12974-016-0571-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Kristen N Fantetti
- Division of Pharmaceutical Sciences, Mylan School of Pharmacy, Duquesne University, 600 Forbes Ave, Pittsburgh, PA, 15282, USA
| | - Erica L Gray
- Division of Pharmaceutical Sciences, Mylan School of Pharmacy, Duquesne University, 600 Forbes Ave, Pittsburgh, PA, 15282, USA
| | - Priya Ganesan
- Division of Pharmaceutical Sciences, Mylan School of Pharmacy, Duquesne University, 600 Forbes Ave, Pittsburgh, PA, 15282, USA
| | - Apurva Kulkarni
- Division of Pharmaceutical Sciences, Mylan School of Pharmacy, Duquesne University, 600 Forbes Ave, Pittsburgh, PA, 15282, USA
| | - Lauren A O'Donnell
- Division of Pharmaceutical Sciences, Mylan School of Pharmacy, Duquesne University, 600 Forbes Ave, Pittsburgh, PA, 15282, USA.
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Villarino A, Laurence A, Robinson GW, Bonelli M, Dema B, Afzali B, Shih HY, Sun HW, Brooks SR, Hennighausen L, Kanno Y, O'Shea JJ. Signal transducer and activator of transcription 5 (STAT5) paralog dose governs T cell effector and regulatory functions. eLife 2016; 5. [PMID: 26999798 PMCID: PMC4856466 DOI: 10.7554/elife.08384] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Accepted: 03/18/2016] [Indexed: 12/13/2022] Open
Abstract
The transcription factor STAT5 is fundamental to the mammalian immune system. However, the relationship between its two paralogs, STAT5A and STAT5B, and the extent to which they are functionally distinct, remain uncertain. Using mouse models of paralog deficiency, we demonstrate that they are not equivalent for CD4+ 'helper' T cells, the principal orchestrators of adaptive immunity. Instead, we find that STAT5B is dominant for both effector and regulatory (Treg) responses and, therefore, uniquely necessary for immunological tolerance. Comparative analysis of genomic distribution and transcriptomic output confirm that STAT5B has fargreater impact but, surprisingly, the data point towards asymmetric expression (i.e. paralog dose), rather than distinct functional properties, as the key distinguishing feature. Thus, we propose a quantitative model of STAT5 paralog activity whereby relative abundance imposes functional specificity (or dominance) in the face of widespread structural homology. DOI:http://dx.doi.org/10.7554/eLife.08384.001 The immune system in mammals is one of the most complex networks in the animal kingdom. One way that its many components communicate is via proteins called cytokines, which are released by cells and detected by receptors on the surface of other cells. This leads to the activation of signals inside the responding cells that alter the activity of genes and, ultimately, direct how they behave. STAT5 is a signal protein that is activated when certain cytokines bind to receptors on the cell surface. Consequently, it is an attractive target for drug therapies that seek to alter immune responses and there is keen interest in understanding how it works. It is an unusual protein in that there are two versions – termed STAT5A and STAT5B – that are produced by two separate genes. Together, STAT5A and STAT5B are fundamental to the immune system but there is considerable debate about whether they perform the same job or have distinct roles. Villarino et al. used a combination of genetic and genomic approaches to investigate how both versions of STAT5 work in mice. The experiments show that STAT5B plays a much bigger role in immune cells than STAT5A. Unexpectedly, the experiments indicate that the disparity is not due to differences in protein activity, but is caused by differences in the amount of these proteins in cells. Villarino et al.’s findings resolve longstanding questions about the relationship between STAT5A and STAT5B within the immune system. A logical next step is to find the molecular mechanisms responsible for causing different amounts of STAT5A and STAT5B to be produced in immune cells. Future work will also compare the roles of STAT5A and STAT5B in non-immune cells and explore whether it might be possible to develop therapies that specifically target one version and not the other. DOI:http://dx.doi.org/10.7554/eLife.08384.002
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Affiliation(s)
- Alejandro Villarino
- Molecular Immunology and Inflammation Branch, National Institute of Arthritis, Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, United States
| | - Arian Laurence
- Molecular Immunology and Inflammation Branch, National Institute of Arthritis, Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, United States
| | - Gertraud W Robinson
- Laboratory of Genetics and Physiology, National Institute of Diabetes, Digestive and Kidney Diseases, National Institutes of Health, Bethesda, United States
| | - Michael Bonelli
- Molecular Immunology and Inflammation Branch, National Institute of Arthritis, Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, United States
| | - Barbara Dema
- Molecular Immunology and Inflammation Branch, National Institute of Arthritis, Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, United States
| | - Behdad Afzali
- Molecular Immunology and Inflammation Branch, National Institute of Arthritis, Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, United States
| | - Han-Yu Shih
- Molecular Immunology and Inflammation Branch, National Institute of Arthritis, Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, United States
| | - Hong-Wei Sun
- Molecular Immunology and Inflammation Branch, National Institute of Arthritis, Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, United States
| | - Stephen R Brooks
- Molecular Immunology and Inflammation Branch, National Institute of Arthritis, Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, United States
| | - Lothar Hennighausen
- Laboratory of Genetics and Physiology, National Institute of Diabetes, Digestive and Kidney Diseases, National Institutes of Health, Bethesda, United States
| | - Yuka Kanno
- Molecular Immunology and Inflammation Branch, National Institute of Arthritis, Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, United States
| | - John J O'Shea
- Molecular Immunology and Inflammation Branch, National Institute of Arthritis, Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, United States
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Park JW, Zhao L, Cheng SY. Inhibition of estrogen-dependent tumorigenesis by the thyroid hormone receptor β in xenograft models. Am J Cancer Res 2013; 3:302-311. [PMID: 23841029 PMCID: PMC3696536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Accepted: 05/20/2013] [Indexed: 06/02/2023] Open
Abstract
Association studies suggest that thyroid hormone receptor β (TRβ) could function as a tumor suppressor in breast cancer development, but unequivocal evidence is still lacking. To understand the role of TRβ in breast tumor development, we adopted the gain-of-function approach by stably expressing the THRB gene in a human breast cancer cell line, MCF-7 (MCF-7-TRβ). Parental MCF-7 cells express the estrogen receptor, but not TRs. MCF-7 cells, stably expressing only the selectable marker, the Neo gene, were also generated as control for comparison (MCF-7-Neo cells). Cell-based studies indicate that the estrogen (E2)-dependent growth of MCF-7 cells was inhibited by the expression of TRβ in the presence of the thyroid hormone (T3). In a xenograft mouse model, large tumors rapidly developed after inoculation of MCF-7-Neo cells in athymic mice. In contrast, markedly smaller tumors (98% smaller) were found when MCF-7-TRβ cells were inoculated in athymic mice, indicating that TRβ inhibited the E2-dependent tumor growth of MCF-7 cells. Further detailed molecular analysis showed that TRβ acted to activate apoptosis and decrease proliferation of tumor cells, resulting in inhibition of tumor growth. The TRβ-mediated inhibition of tumor growth was elucidated via down-regulation of the JAK-STAT-cyclin D pathways. This in vivo evidence shows that TRβ could act as a tumor suppressor in breast tumorigenesis. The present study provides new insights into the role of TR in breast cancer.
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Affiliation(s)
- Jeong Won Park
- Laboratory of Molecular Biology, Center for Cancer Research, National Cancer Institute Bethesda, MD, USA
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