151
|
Mao X, Su Z, Mookhtiar AK. Long non-coding RNA: a versatile regulator of the nuclear factor-κB signalling circuit. Immunology 2017; 150:379-388. [PMID: 27936492 DOI: 10.1111/imm.12698] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 11/27/2016] [Accepted: 12/01/2016] [Indexed: 12/16/2022] Open
Abstract
The nuclear factor-κB (NF-κB) family of transcription factors play an essential role for the regulation of inflammatory responses, immune function and malignant transformation. Aberrant activity of this signalling pathway may lead to inflammation, autoimmune diseases and oncogenesis. Over the last two decades great progress has been made in the understanding of NF-κB activation and how the response is counteracted for maintaining tissue homeostasis. Therapeutic targeting of this pathway has largely remained ineffective due to the widespread role of this vital pathway and the lack of specificity of the therapies currently available. Besides regulatory proteins and microRNAs, long non-coding RNA (lncRNA) is emerging as another critical layer of the intricate modulatory architecture for the control of the NF-κB signalling circuit. In this paper we focus on recent progress concerning lncRNA-mediated modulation of the NF-κB pathway, and evaluate the potential therapeutic uses and challenges of using lncRNAs that regulate NF-κB activity.
Collapse
Affiliation(s)
- Xiaohua Mao
- Department of Biochemistry, Key Laboratory of Ministry of Education for Developmental Genes and Human Diseases, School of Medicine, Southeast University, Nanjing, Jiangsu, China
| | - Zhenyi Su
- Department of Biochemistry, Key Laboratory of Ministry of Education for Developmental Genes and Human Diseases, School of Medicine, Southeast University, Nanjing, Jiangsu, China
| | | |
Collapse
|
152
|
Durand JK, Baldwin AS. Targeting IKK and NF-κB for Therapy. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2017; 107:77-115. [PMID: 28215229 DOI: 10.1016/bs.apcsb.2016.11.006] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
In addition to regulating immune responses, the NF-κB family of transcription factors also promotes cellular proliferation and survival. NF-κB and its activating kinase, IKK, have become appealing therapeutic targets because of their critical roles in the progression of many diseases including chronic inflammation and cancer. Here, we discuss the conditions that lead to pathway activation, the effects of constitutive activation, and some of the strategies used to inhibit NF-κB signaling.
Collapse
Affiliation(s)
- J K Durand
- Curriculum in Genetics and Molecular Biology, University of North Carolina, Chapel Hill, NC, United States; Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, United States
| | - A S Baldwin
- Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, United States.
| |
Collapse
|
153
|
Smole A, Lainšček D, Bezeljak U, Horvat S, Jerala R. A Synthetic Mammalian Therapeutic Gene Circuit for Sensing and Suppressing Inflammation. Mol Ther 2017; 25:102-119. [PMID: 28129106 DOI: 10.1016/j.ymthe.2016.10.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 10/20/2016] [Accepted: 10/21/2016] [Indexed: 12/20/2022] Open
Abstract
Inflammation, which is a highly regulated host response against danger signals, may be harmful if it is excessive and deregulated. Ideally, anti-inflammatory therapy should autonomously commence as soon as possible after the onset of inflammation, should be controllable by a physician, and should not systemically block beneficial immune response in the long term. We describe a genetically encoded anti-inflammatory mammalian cell device based on a modular engineered genetic circuit comprising a sensor, an amplifier, a "thresholder" to restrict activation of a positive-feedback loop, a combination of advanced clinically used biopharmaceutical proteins, and orthogonal regulatory elements that linked modules into the functional device. This genetic circuit was autonomously activated by inflammatory signals, including endogenous cecal ligation and puncture (CLP)-induced inflammation in mice and serum from a systemic juvenile idiopathic arthritis (sIJA) patient, and could be reset externally by a chemical signal. The microencapsulated anti-inflammatory device significantly reduced the pathology in dextran sodium sulfate (DSS)-induced acute murine colitis, demonstrating a synthetic immunological approach for autonomous anti-inflammatory therapy.
Collapse
Affiliation(s)
- Anže Smole
- Department of Synthetic Biology and Immunology, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
| | - Duško Lainšček
- Department of Synthetic Biology and Immunology, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
| | - Urban Bezeljak
- Department of Synthetic Biology and Immunology, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia; Faculty of Chemistry and Chemical Technology, University of Ljubljana, 1000 Ljubljana, Slovenia
| | - Simon Horvat
- Department of Synthetic Biology and Immunology, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia; EN-FIST Centre of Excellence, 1000 Ljubljana, Slovenia; Biotechnical Faculty, University of Ljubljana, 1000 Ljubljana, Slovenia
| | - Roman Jerala
- Department of Synthetic Biology and Immunology, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia; EN-FIST Centre of Excellence, 1000 Ljubljana, Slovenia.
| |
Collapse
|
154
|
Armstrong CL, Galisteo R, Brown SA, Winkles JA. TWEAK activation of the non-canonical NF-κB signaling pathway differentially regulates melanoma and prostate cancer cell invasion. Oncotarget 2016; 7:81474-81492. [PMID: 27821799 PMCID: PMC5348407 DOI: 10.18632/oncotarget.13034] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 10/14/2016] [Indexed: 12/22/2022] Open
Abstract
Tumor necrosis factor-like weak inducer of apoptosis (TWEAK) is a multifunctional cytokine that binds with high affinity to a plasma membrane-anchored receptor named Fn14. Both TWEAK and Fn14 expression has been detected in human cancer tissue, and studies have shown that TWEAK/Fn14 signaling can promote either "pro-cancer" or "anti-cancer" cellular effects in vitro, depending on the cancer cell line under investigation. In this study, we engineered murine B16 melanoma cells to secrete high levels of soluble TWEAK and examined their properties. TWEAK production by B16 cells preferentially activated the non-canonical NF-κB signaling pathway and increased the expression of several previously described TWEAK-inducible genes, including Fn14. TWEAK overexpression in B16 cells inhibited both cell growth and invasion in vitro. The TWEAK-mediated reduction in B16 cell invasive capacity was dependent on activation of the non-canonical NF-κB signaling pathway. Finally, we found that this same signaling pathway was also important for TWEAK-stimulated human DU145 prostate cancer cell invasion. Therefore, even though TWEAK:Fn14 binding activates non-canonical NF-κB signaling in both melanoma and prostate cancer cells, this shared cellular response can trigger a very different downstream outcome (inhibition or stimulation of cell invasiveness, respectively).
Collapse
Affiliation(s)
- Cheryl L. Armstrong
- Department of Surgery, University of Maryland School of Medicine, Baltimore, MD, USA
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine, Baltimore, MD, USA
- Marlene and Stewart Greenebaum Comprehensive Cancer Center, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Rebeca Galisteo
- Department of Surgery, University of Maryland School of Medicine, Baltimore, MD, USA
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine, Baltimore, MD, USA
- Marlene and Stewart Greenebaum Comprehensive Cancer Center, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Sharron A.N. Brown
- Department of Surgery, University of Maryland School of Medicine, Baltimore, MD, USA
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine, Baltimore, MD, USA
- Marlene and Stewart Greenebaum Comprehensive Cancer Center, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Jeffrey A. Winkles
- Department of Surgery, University of Maryland School of Medicine, Baltimore, MD, USA
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine, Baltimore, MD, USA
- Marlene and Stewart Greenebaum Comprehensive Cancer Center, University of Maryland School of Medicine, Baltimore, MD, USA
| |
Collapse
|
155
|
The Extrusion Process as an Alternative for Improving the Biological Potential of Sorghum Bran: Phenolic Compounds and Antiradical and Anti-Inflammatory Capacity. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2016; 2016:8387975. [PMID: 27738445 PMCID: PMC5055914 DOI: 10.1155/2016/8387975] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 08/01/2016] [Accepted: 08/14/2016] [Indexed: 11/17/2022]
Abstract
Approximately 80% of sorghum phenolic compounds are linked to arabinoxylans by ester bonds, which are capable of resisting the digestion process in the upper gastrointestinal tract, compromising their bioaccessibility and biological potential. The aim of this study was to evaluate the effect of the extrusion process on the content of phenolic compounds in sorghum bran and its impact on phenolic compounds and antiradical and anti-inflammatory capacity. Results revealed that the extrusion process increased total phenol content in sorghum bran compared to nonextruded sorghum, particularly for extrusion at 180°C with 20% moisture content (2.0222 ± 0.0157 versus 3.0729 ± 0.0187 mg GAE/g +52%), which positively affected antiradical capacity measured by the DPPH and TEAC assays. The percentage of inhibition of nitric oxide (NO) production by RAW cells due to the presence of extruded sorghum bran extract was significantly higher than that of nonextruded sorghum bran extract (90.2 ± 1.9% versus 76.2 ± 1.3%). The results suggest that extruded sorghum bran could be used as a functional ingredient and provide advantages to consumers by reducing diseases related to oxidative stress and inflammation.
Collapse
|
156
|
Kang K, Won M, Yuk JM, Park CY, Byun HS, Park KA, Lee SR, Kang YG, Shen HM, Lee IY, Hur GM. IinQ attenuates systemic inflammatory responses via selectively impairing the Myddosome complex formation upon TLR4 ligation. Biochem Pharmacol 2016; 121:52-66. [PMID: 27664853 DOI: 10.1016/j.bcp.2016.09.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Accepted: 09/19/2016] [Indexed: 01/21/2023]
Abstract
A specific small-molecule inhibitor of the TLR4 signaling complex upstream of the IKK would likely provide therapeutic benefit for NF-κB-mediated inflammatory disease. We previously identified brazilin as a selective upstream IKK inhibitor targeting the Myddosome complex. In this study, using a cell-based ubiquitination assay for IRAK1 and a chemical library comprising a series of structural analogues of brazilin, a novel small molecule, 2-hydroxy-5,6-dihydroisoindolo[1,2-a]isoquinoline-3,8-dione (IinQ), was identified as a selective and potent inhibitor of IRAK1-dependent NF-κB activation upon TLR4 ligation. In RAW264.7 macrophages, IinQ drastically suppressed activation of upstream IKK signaling events including membrane-bound IRAK1 ubiquitination and IKK phosphorylation by the TLR4 ligand, resulting in reduced expression of proinflammatory mediators including IL-6, TNF-α, and nitric oxide. Interestingly, IinQ did not suppress NF-κB activation via the TLR3 ligand, DNA damaging agents, or a protein kinase C activator, indicating IinQ is specific for TLR4 signaling. Analysis of upstream signaling events further confirmed that IinQ disrupts the MyD88-IRAK1-TRAF6 complex formation induced by LPS treatment, without affecting TLR4 oligomerization. Moreover, intravenous administration of IinQ significantly reduced lethality and attenuated systemic inflammatory responses in an in vivo mouse model of endotoxin shock following LPS challenge. Thus, IinQ represents a novel class of brazilin analogues with improved potency and specificity toward disruption of Myddosome complex formation in TLR4 signaling, indicating that IinQ may be a promising therapeutic candidate for the treatment of systemic inflammatory diseases.
Collapse
Affiliation(s)
- Kidong Kang
- Department of Pharmacology, College of Medicine, Chungnam National University, 266 Munhwa-ro, Daejeon 35015, Republic of Korea; Department of Medical Science, College of Medicine, Chungnam National University, 266 Munhwa-ro, Daejeon 35015, Republic of Korea
| | - Minho Won
- Department of Pharmacology, College of Medicine, Chungnam National University, 266 Munhwa-ro, Daejeon 35015, Republic of Korea
| | - Jae-Min Yuk
- Department of Medical Science, College of Medicine, Chungnam National University, 266 Munhwa-ro, Daejeon 35015, Republic of Korea; Department of Infection Biology, College of Medicine, Chungnam National University, 266 Munhwa-ro, Daejeon 35015, Republic of Korea
| | - Chan-Yong Park
- Eco-Friendly New Materials Research Center, Korea Research Institute of Chemical Technology, 141 Gajeong-ro, Yusung-gu, Daejeon 34114, Republic of Korea
| | - Hee Sun Byun
- Department of Pharmacology, College of Medicine, Chungnam National University, 266 Munhwa-ro, Daejeon 35015, Republic of Korea
| | - Kyeong Ah Park
- Department of Pharmacology, College of Medicine, Chungnam National University, 266 Munhwa-ro, Daejeon 35015, Republic of Korea
| | - So-Ra Lee
- Department of Pharmacology, College of Medicine, Chungnam National University, 266 Munhwa-ro, Daejeon 35015, Republic of Korea; Department of Medical Science, College of Medicine, Chungnam National University, 266 Munhwa-ro, Daejeon 35015, Republic of Korea
| | - Young-Goo Kang
- Eco-Friendly New Materials Research Center, Korea Research Institute of Chemical Technology, 141 Gajeong-ro, Yusung-gu, Daejeon 34114, Republic of Korea
| | - Han-Ming Shen
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Ill Young Lee
- Eco-Friendly New Materials Research Center, Korea Research Institute of Chemical Technology, 141 Gajeong-ro, Yusung-gu, Daejeon 34114, Republic of Korea.
| | - Gang Min Hur
- Department of Pharmacology, College of Medicine, Chungnam National University, 266 Munhwa-ro, Daejeon 35015, Republic of Korea; Department of Medical Science, College of Medicine, Chungnam National University, 266 Munhwa-ro, Daejeon 35015, Republic of Korea.
| |
Collapse
|
157
|
Matthews GM, de Matos Simoes R, Dhimolea E, Sheffer M, Gandolfi S, Dashevsky O, Sorrell JD, Mitsiades CS. NF-κB dysregulation in multiple myeloma. Semin Cancer Biol 2016; 39:68-76. [PMID: 27544796 DOI: 10.1016/j.semcancer.2016.08.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 08/16/2016] [Indexed: 12/29/2022]
Abstract
The nuclear factor-κB (NF-κB) transcription factor family plays critical roles in the pathophysiology of hematologic neoplasias, including multiple myeloma. The current review examines the roles that this transcription factor system plays in multiple myeloma cells and the nonmalignant accessory cells of the local microenvironment; as well as the evidence indicating that a large proportion of myeloma patients harbor genomic lesions which perturb diverse genes regulating the activity of NF-κB. This article also discusses the therapeutic targeting of the NF-κB pathway using proteasome inhibitors, a pharmacological class that has become a cornerstone in the therapeutic management of myeloma; and reviews some of the future challenges and opportunities for NF-κB-related research in myeloma.
Collapse
Affiliation(s)
- Geoffrey M Matthews
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, United States
| | - Ricardo de Matos Simoes
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, United States
| | - Eugen Dhimolea
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, United States
| | - Michal Sheffer
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, United States
| | - Sara Gandolfi
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, United States
| | - Olga Dashevsky
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, United States
| | - Jeffrey D Sorrell
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, United States
| | - Constantine S Mitsiades
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, United States.
| |
Collapse
|
158
|
Zhao G, Su Z, Song D, Mao Y, Mao X. The long noncoding RNA MALAT1 regulates the lipopolysaccharide-induced inflammatory response through its interaction with NF-κB. FEBS Lett 2016; 590:2884-95. [PMID: 27434861 DOI: 10.1002/1873-3468.12315] [Citation(s) in RCA: 174] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Revised: 06/28/2016] [Accepted: 07/11/2016] [Indexed: 12/14/2022]
Abstract
MALAT1 is a conserved long noncoding RNA whose expression correlates with many human cancers. However, its significance in immunity remains largely unknown. Here, we observe that MALAT1 is upregulated in lipopolysaccharide (LPS)-activated macrophages. Knockdown of MALAT1 increases LPS-induced expression of TNFα and IL-6. Mechanistically, MALAT1 was found to interact with NF-κB in the nucleus, thus inhibiting its DNA binding activity and consequently decreasing the production of inflammatory cytokines. Additionally, abnormal expression of MALAT1 was found to be NF-κB-dependent. These findings suggest that MALAT1 may function as an autonegative feedback regulator of NF-κB to help fine-tune innate immune responses.
Collapse
Affiliation(s)
- Gui Zhao
- Department of Biochemistry, School of Medicine & Key Laboratory of Ministry of Education for Developmental Genes and Human Diseases, Southeast University, Nanjing, China
| | - Zhenyi Su
- Department of Biochemistry, School of Medicine & Key Laboratory of Ministry of Education for Developmental Genes and Human Diseases, Southeast University, Nanjing, China
| | - Dan Song
- Department of Biochemistry, School of Medicine & Key Laboratory of Ministry of Education for Developmental Genes and Human Diseases, Southeast University, Nanjing, China
| | - Yimin Mao
- Department of Biochemistry, School of Medicine & Key Laboratory of Ministry of Education for Developmental Genes and Human Diseases, Southeast University, Nanjing, China.,School of Life Science and Technology, China Pharmaceutical University, Nanjing, China
| | - Xiaohua Mao
- Department of Biochemistry, School of Medicine & Key Laboratory of Ministry of Education for Developmental Genes and Human Diseases, Southeast University, Nanjing, China
| |
Collapse
|
159
|
HMBA Enhances Prostratin-Induced Activation of Latent HIV-1 via Suppressing the Expression of Negative Feedback Regulator A20/TNFAIP3 in NF-κB Signaling. BIOMED RESEARCH INTERNATIONAL 2016; 2016:5173205. [PMID: 27529070 PMCID: PMC4978819 DOI: 10.1155/2016/5173205] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Accepted: 06/21/2016] [Indexed: 01/05/2023]
Abstract
In the past decade, much emphasis has been put on the transcriptional activation of HIV-1, which is proposed as a promised strategy for eradicating latent HIV-1 provirus. Two drugs, prostratin and hexamethylene bisacetamide (HMBA), have shown potent effects as inducers for releasing HIV-1 latency when used alone or in combination, although their cellular target(s) are currently not well understood, especially under drug combination. Here, we have shown that HMBA and prostratin synergistically release HIV-1 latency via different mechanisms. While prostratin strongly stimulates HMBA-induced HIV-1 transcription via improved P-TEFb activation, HMBA is capable of boosting NF-κB-dependent transcription initiation by suppressing prostratin-induced expression of the deubiquitinase A20, a negative feedback regulator in the NF-κB signaling pathway. In addition, HMBA was able to increase prostratin-induced phosphorylation and degradation of NF-κB inhibitor IκBα, thereby enhancing and prolonging prostratin-induced nuclear translocation of NF-κB, a prerequisite for stimulation of transcription initiation. Thus, by blocking the negative feedback circuit, HMBA functions as a signaling enhancer of the NF-κB signaling pathway.
Collapse
|
160
|
Amrouche L, Desbuissons G, Rabant M, Sauvaget V, Nguyen C, Benon A, Barre P, Rabaté C, Lebreton X, Gallazzini M, Legendre C, Terzi F, Anglicheau D. MicroRNA-146a in Human and Experimental Ischemic AKI: CXCL8-Dependent Mechanism of Action. J Am Soc Nephrol 2016; 28:479-493. [PMID: 27444565 DOI: 10.1681/asn.2016010045] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 05/31/2016] [Indexed: 12/19/2022] Open
Abstract
AKI leads to tubular injury and interstitial inflammation that must be controlled to avoid the development of fibrosis. We hypothesized that microRNAs are involved in the regulation of the balance between lesion formation and adaptive repair. We found that, under proinflammatory conditions, microRNA-146a (miR-146a) is transcriptionally upregulated by ligands of IL-1 receptor/Toll-like receptor family members via the activation of NF-κB in cultured renal proximal tubular cells. In vivo, more severe renal ischemia-reperfusion injury (IRI) associated with increased expression of miR-146a in both allografts and urine of human kidney transplant recipients, and unilateral IRI in mice induced miR-146a expression in injured kidneys. After unilateral IRI, miR-146a-/- mice exhibited more extensive tubular injury, inflammatory infiltrates, and fibrosis than wild-type mice. In vitro, overexpression or downregulation of miR-146a diminished or enhanced, respectively, IL-1 receptor-associated kinase 1 expression and induced similar effects on C-X-C motif ligand 8 (CXCL8)/CXCL1 expression by injured tubular cells. Moreover, inhibition of CXCL8/CXCL1 signaling prevented the development of inflammation and fibrosis after IRI in miR-146a-/- mice. In conclusion, these results indicate that miR-146a is a key mediator of the renal tubular response to IRI that limits the consequences of inflammation, a key process in the development of AKI and CKD.
Collapse
Affiliation(s)
- Lucile Amrouche
- Necker-Enfants Malades Institute, French National Institute of Health and Medical Research U1151, Paris, France.,Paris Descartes, Sorbonne Paris Cité University, Paris, France.,Department of Nephrology and Kidney Transplantation
| | - Geoffroy Desbuissons
- Necker-Enfants Malades Institute, French National Institute of Health and Medical Research U1151, Paris, France
| | - Marion Rabant
- Paris Descartes, Sorbonne Paris Cité University, Paris, France.,Department of Pathology, and
| | - Virginia Sauvaget
- Necker-Enfants Malades Institute, French National Institute of Health and Medical Research U1151, Paris, France
| | - Clément Nguyen
- Necker-Enfants Malades Institute, French National Institute of Health and Medical Research U1151, Paris, France
| | - Aurélien Benon
- Necker-Enfants Malades Institute, French National Institute of Health and Medical Research U1151, Paris, France
| | - Pauline Barre
- Necker-Enfants Malades Institute, French National Institute of Health and Medical Research U1151, Paris, France
| | - Clémentine Rabaté
- Paris Descartes, Sorbonne Paris Cité University, Paris, France.,Department of Nephrology and Kidney Transplantation
| | | | - Morgan Gallazzini
- Necker-Enfants Malades Institute, French National Institute of Health and Medical Research U1151, Paris, France
| | - Christophe Legendre
- Necker-Enfants Malades Institute, French National Institute of Health and Medical Research U1151, Paris, France.,Paris Descartes, Sorbonne Paris Cité University, Paris, France.,Department of Nephrology and Kidney Transplantation.,Réseau Thématique de Recherche et de Soins Centaure, Labex Transplantex, Necker Hospital, Paris, France
| | - Fabiola Terzi
- Necker-Enfants Malades Institute, French National Institute of Health and Medical Research U1151, Paris, France
| | - Dany Anglicheau
- Necker-Enfants Malades Institute, French National Institute of Health and Medical Research U1151, Paris, France; .,Paris Descartes, Sorbonne Paris Cité University, Paris, France.,Department of Nephrology and Kidney Transplantation.,Réseau Thématique de Recherche et de Soins Centaure, Labex Transplantex, Necker Hospital, Paris, France
| |
Collapse
|
161
|
Liu B, Sun L, Song E. Pinched by RNA "fingers": Long noncoding RNAs hitting signal transduction pathways. Mol Cell Oncol 2016; 3:e1046582. [PMID: 27314086 PMCID: PMC4909457 DOI: 10.1080/23723556.2015.1046582] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Revised: 04/24/2015] [Accepted: 04/25/2015] [Indexed: 11/30/2022]
Abstract
We have recently reported a long noncoding RNA that interacts with nuclear factor κB (NFκB) and represses NFκB activation by physically masking the phosphorylation site of inhibitor of NFκB (IκB). Our findings have revealed a new class of long noncoding RNAs (lncRNAs) that directly interact with proteins involved in signal transduction pathways and interfere with cell signaling. This implicates a potential strategy for the design of RNA-based targeted drugs.
Collapse
Affiliation(s)
- Bodu Liu
- Breast Tumor Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China; Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China; Key Laboratory of Gene Engineering of Ministry of Education, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, China
| | - Lijuan Sun
- Breast Tumor Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China; Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Erwei Song
- Breast Tumor Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China; Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China; Key Laboratory of Gene Engineering of Ministry of Education, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, China
| |
Collapse
|
162
|
Tiedje C, Diaz-Muñoz MD, Trulley P, Ahlfors H, Laaß K, Blackshear PJ, Turner M, Gaestel M. The RNA-binding protein TTP is a global post-transcriptional regulator of feedback control in inflammation. Nucleic Acids Res 2016; 44:7418-40. [PMID: 27220464 PMCID: PMC5009735 DOI: 10.1093/nar/gkw474] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Accepted: 05/16/2016] [Indexed: 12/28/2022] Open
Abstract
RNA-binding proteins (RBPs) facilitate post-transcriptional control of eukaryotic gene expression at multiple levels. The RBP tristetraprolin (TTP/Zfp36) is a signal-induced phosphorylated anti-inflammatory protein guiding unstable mRNAs of pro-inflammatory proteins for degradation and preventing translation. Using iCLIP, we have identified numerous mRNA targets bound by wild-type TTP and by a non-MK2-phosphorylatable TTP mutant (TTP-AA) in 1 h LPS-stimulated macrophages and correlated their interaction with TTP to changes at the level of mRNA abundance and translation in a transcriptome-wide manner. The close similarity of the transcriptomes of TTP-deficient and TTP-expressing macrophages upon short LPS stimulation suggested an effective inactivation of TTP by MK2, whereas retained RNA-binding capacity of TTP-AA to 3′UTRs caused profound changes in the transcriptome and translatome, altered NF-κB-activation and induced cell death. Increased TTP binding to the 3′UTR of feedback inhibitor mRNAs, such as Ier3, Dusp1 or Tnfaip3, in the absence of MK2-dependent TTP neutralization resulted in a strong reduction of their protein synthesis contributing to the deregulation of the NF-κB-signaling pathway. Taken together, our study uncovers a role of TTP as a suppressor of feedback inhibitors of inflammation and highlights the importance of fine-tuned TTP activity-regulation by MK2 in order to control the pro-inflammatory response.
Collapse
Affiliation(s)
- Christopher Tiedje
- Institute of Physiological Chemistry, Medical School Hannover (MHH), 30625 Hannover, Germany
| | - Manuel D Diaz-Muñoz
- Lymphocyte Signalling and Development, The Babraham Institute, Cambridge CB22 3AT, UK
| | - Philipp Trulley
- Institute of Physiological Chemistry, Medical School Hannover (MHH), 30625 Hannover, Germany
| | - Helena Ahlfors
- Lymphocyte Signalling and Development, The Babraham Institute, Cambridge CB22 3AT, UK
| | - Kathrin Laaß
- Institute of Physiological Chemistry, Medical School Hannover (MHH), 30625 Hannover, Germany
| | - Perry J Blackshear
- Laboratory of Signal Transduction, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, USA; and Departments of Medicine and Biochemistry, Duke University Medical Center, Durham, NC 27710, USA
| | - Martin Turner
- Lymphocyte Signalling and Development, The Babraham Institute, Cambridge CB22 3AT, UK
| | - Matthias Gaestel
- Institute of Physiological Chemistry, Medical School Hannover (MHH), 30625 Hannover, Germany
| |
Collapse
|
163
|
Ankers JM, Awais R, Jones NA, Boyd J, Ryan S, Adamson AD, Harper CV, Bridge L, Spiller DG, Jackson DA, Paszek P, Sée V, White MR. Dynamic NF-κB and E2F interactions control the priority and timing of inflammatory signalling and cell proliferation. eLife 2016; 5. [PMID: 27185527 PMCID: PMC4869934 DOI: 10.7554/elife.10473] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Accepted: 04/13/2016] [Indexed: 01/07/2023] Open
Abstract
Dynamic cellular systems reprogram gene expression to ensure appropriate cellular fate responses to specific extracellular cues. Here we demonstrate that the dynamics of Nuclear Factor kappa B (NF-κB) signalling and the cell cycle are prioritised differently depending on the timing of an inflammatory signal. Using iterative experimental and computational analyses, we show physical and functional interactions between NF-κB and the E2 Factor 1 (E2F-1) and E2 Factor 4 (E2F-4) cell cycle regulators. These interactions modulate the NF-κB response. In S-phase, the NF-κB response was delayed or repressed, while cell cycle progression was unimpeded. By contrast, activation of NF-κB at the G1/S boundary resulted in a longer cell cycle and more synchronous initial NF-κB responses between cells. These data identify new mechanisms by which the cellular response to stress is differentially controlled at different stages of the cell cycle. DOI:http://dx.doi.org/10.7554/eLife.10473.001 Investigating how cells adapt to the constantly changing environment inside the body is vitally important for understanding how the body responds to an injury or infection. One of the ways in which human cells adapt is by dividing to produce new cells. This takes place in a repeating pattern of events, known as the cell cycle, through which a cell copies its DNA (in a stage known as S-phase) and then divides to make two daughter cells. Each stage of the cell cycle is tightly controlled; for example, a family of proteins called E2 factors control the entry of the cell into S phase. “Inflammatory” signals produced by a wound or during an infection can activate a protein called Nuclear Factor-kappaB (NF-κB), which controls the activity of genes that allow cells to adapt to the situation. Research shows that the activity of NF-κB is also regulated by the cell cycle, but it has not been clear how this works. Here, Ankers et al. investigated whether the stage of the cell cycle might affect how NF-κB responds to inflammatory signals. The experiments show that the NF-κB response was stronger in cells that were just about to enter S-phase than in cells that were already copying their DNA. An E2 factor called E2F-1 –which accumulates in the run up to S-phase – interacts with NF-κB and can alter the activity of certain genes. However, during S-phase, another E2 factor family member called E2F-4 binds to NF-κB and represses its activation. Next, Ankers et al. used a mathematical model to understand how these protein interactions can affect the response of cells to inflammatory signals. These findings suggest that direct interactions between E2 factor proteins and NF-κB enable cells to decide whether to divide or react in different ways to inflammatory signals. The research tools developed in this study, combined with other new experimental techniques, will allow researchers to accurately predict how cells will respond to inflammatory signals at different points in the cell cycle. DOI:http://dx.doi.org/10.7554/eLife.10473.002
Collapse
Affiliation(s)
- John M Ankers
- Centre for Cell Imaging, Institute of Integrative Biology, Liverpool, United Kingdom
| | - Raheela Awais
- Centre for Cell Imaging, Institute of Integrative Biology, Liverpool, United Kingdom.,Systems Microscopy Centre, Faculty of Life Sciences, Manchester, United Kingdom
| | - Nicholas A Jones
- Systems Microscopy Centre, Faculty of Life Sciences, Manchester, United Kingdom
| | - James Boyd
- Systems Microscopy Centre, Faculty of Life Sciences, Manchester, United Kingdom
| | - Sheila Ryan
- Centre for Cell Imaging, Institute of Integrative Biology, Liverpool, United Kingdom.,Systems Microscopy Centre, Faculty of Life Sciences, Manchester, United Kingdom
| | - Antony D Adamson
- Systems Microscopy Centre, Faculty of Life Sciences, Manchester, United Kingdom
| | - Claire V Harper
- Systems Microscopy Centre, Faculty of Life Sciences, Manchester, United Kingdom
| | - Lloyd Bridge
- Systems Microscopy Centre, Faculty of Life Sciences, Manchester, United Kingdom.,Department of Mathematics, University of Swansea, Swansea, United Kingdom
| | - David G Spiller
- Systems Microscopy Centre, Faculty of Life Sciences, Manchester, United Kingdom
| | - Dean A Jackson
- Systems Microscopy Centre, Faculty of Life Sciences, Manchester, United Kingdom
| | - Pawel Paszek
- Systems Microscopy Centre, Faculty of Life Sciences, Manchester, United Kingdom
| | - Violaine Sée
- Centre for Cell Imaging, Institute of Integrative Biology, Liverpool, United Kingdom
| | - Michael Rh White
- Systems Microscopy Centre, Faculty of Life Sciences, Manchester, United Kingdom
| |
Collapse
|
164
|
Furrer A, Hottiger MO, Valaperti A. Absent in Melanoma 2 (AIM2) limits pro-inflammatory cytokine transcription in cardiomyocytes by inhibiting STAT1 phosphorylation. Mol Immunol 2016; 74:47-58. [PMID: 27148820 DOI: 10.1016/j.molimm.2016.04.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Revised: 03/29/2016] [Accepted: 04/14/2016] [Indexed: 01/01/2023]
Abstract
Interferon (IFN)-γ is highly upregulated during heart inflammation and enhances the production of pro-inflammatory cytokines. Absent in Melanoma 2 (AIM2) is an IFN-inducible protein implicated as a component of the inflammasome. Here we seek to determine the role of AIM2 during inflammation in cardiac cells. We found that the presence of AIM2, but not of the other inflammasome components Nod-like receptor (NLR) NLRP3 or NLRC4, specifically limited the transcription of the pro-inflammatory cytokines interleukin (IL)-6, IP-10, and tumor necrosis factor (TNF)-α in HL-1 mouse cardiomyocytes stimulated with IFN-γ and lipopolysaccharides (LPS). Similarly, AIM2 reduced pro-inflammatory cytokine transcription in primary mouse neonatal cardiomyocytes (MNC), but not in primary mouse neonatal cardiac fibroblasts (MNF). Interestingly, AIM2-dependent reduction of pro-inflammatory cytokines in cardiomyocytes was independent of Caspase-1. Mechanistically, AIM2 reduced pro-inflammatory cytokine transcription in cardiomyocytes by interacting with and inhibiting the phosphorylation of STAT1. In AIM2-depleted cardiomyocytes, increased STAT1 phosphorylation enhanced the NF-κB pathway by promoting NF-κB p65 phosphorylation and acetylation. These results show for the first time that AIM2 plays an important anti-inflammatory, yet inflammasome-independent function in cardiomyocytes. Our findings will help to further understand how the various heart cell types differently react to inflammatory stimuli.
Collapse
Affiliation(s)
- Antonia Furrer
- Department of Molecular Mechanisms of Disease, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Michael O Hottiger
- Department of Molecular Mechanisms of Disease, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Alan Valaperti
- Department of Molecular Mechanisms of Disease, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland.
| |
Collapse
|
165
|
Li S, Zhu X, Liu B, Wang G, Ao P. Endogenous molecular network reveals two mechanisms of heterogeneity within gastric cancer. Oncotarget 2016; 6:13607-27. [PMID: 25962957 PMCID: PMC4537037 DOI: 10.18632/oncotarget.3633] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Accepted: 04/10/2015] [Indexed: 12/20/2022] Open
Abstract
Intratumor heterogeneity is a common phenomenon and impedes cancer therapy and research. Gastric cancer (GC) cells have generally been classified into two heterogeneous cellular phenotypes, the gastric and intestinal types, yet the mechanisms of maintaining two phenotypes and controlling phenotypic transition are largely unknown. A qualitative systematic framework, the endogenous molecular network hypothesis, has recently been proposed to understand cancer genesis and progression. Here, a minimal network corresponding to such framework was found for GC and was quantified via a stochastic nonlinear dynamical system. We then further extended the framework to address the important question of intratumor heterogeneity quantitatively. The working network characterized main known features of normal gastric epithelial and GC cell phenotypes. Our results demonstrated that four positive feedback loops in the network are critical for GC cell phenotypes. Moreover, two mechanisms that contribute to GC cell heterogeneity were identified: particular positive feedback loops are responsible for the maintenance of intestinal and gastric phenotypes; GC cell progression routes that were revealed by the dynamical behaviors of individual key components are heterogeneous. In this work, we constructed an endogenous molecular network of GC that can be expanded in the future and would broaden the known mechanisms of intratumor heterogeneity.
Collapse
Affiliation(s)
- Site Li
- Shanghai Center for Systems Biomedicine, Ministry of Education Key Laboratory of Systems Biomedicine, Collaborative Innovation Center of Systems Biomedicine, Shanghai Jiao Tong University, Shanghai 200240, China
| | | | - Bingya Liu
- Shanghai Center for Systems Biomedicine, Ministry of Education Key Laboratory of Systems Biomedicine, Collaborative Innovation Center of Systems Biomedicine, Shanghai Jiao Tong University, Shanghai 200240, China.,Shanghai Key Laboratory of Gastric Neoplasms, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Gaowei Wang
- Shanghai Center for Systems Biomedicine, Ministry of Education Key Laboratory of Systems Biomedicine, Collaborative Innovation Center of Systems Biomedicine, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Ping Ao
- Shanghai Center for Systems Biomedicine, Ministry of Education Key Laboratory of Systems Biomedicine, Collaborative Innovation Center of Systems Biomedicine, Shanghai Jiao Tong University, Shanghai 200240, China.,State Key Laboratory for Oncogenes and Related Genes, Shanghai Cancer Institute, Shanghai Jiao Tong University School of Medicine, Shanghai 200032, China.,Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China
| |
Collapse
|
166
|
Regulation of the Adaptive Immune Response by the IκB Family Protein Bcl-3. Cells 2016; 5:cells5020014. [PMID: 27023613 PMCID: PMC4931663 DOI: 10.3390/cells5020014] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Revised: 03/17/2016] [Accepted: 03/17/2016] [Indexed: 01/14/2023] Open
Abstract
Bcl-3 is a member of the IκB family of proteins and an important regulator of Nuclear Factor (NF)-κB activity. The ability of Bcl-3 to bind and regulate specific NF-κB dimers has been studied in great depth, but its physiological roles in vivo are still not fully understood. It is, however, becoming clear that Bcl-3 is essential for the proper development, survival and activity of adaptive immune cells. Bcl-3 dysregulation can be observed in a number of autoimmune pathologies, and Bcl3-deficient animals are more susceptible to bacterial and parasitic infection. This review will describe our current understanding of the roles played by Bcl-3 in the development and regulation of the adaptive immune response, including lymphoid organogenesis, immune tolerance, lymphocyte function and dendritic cell biology.
Collapse
|
167
|
Tanaka T, Iino M. Nuclear Translocation of p65 is Controlled by Sec6 via the Degradation of IκBα. J Cell Physiol 2016; 231:719-30. [PMID: 26247921 DOI: 10.1002/jcp.25122] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Accepted: 08/04/2015] [Indexed: 12/18/2022]
Abstract
Nuclear factor-κB (NF-κB) is an inducible transcription factor that mediates immune and inflammatory responses. NF-κB pathways are also involved in cell adhesion, differentiation, proliferation, autophagy, senescence, and protection against apoptosis. The deregulation of NF-κB activity is found in a number of disease states, including cancer, arthritis, chronic inflammation, asthma, neurodegenerative diseases, and heart disease. The 90 kDa ribosomal S6 kinase (p90RSK) family, which is serine/threonine kinases, is phosphorylated by extracellular signal-regulated kinase1/2 (ERK1/2) and is related to NF-κB pathways. Our previous studies revealed that Sec6, a component of the exocyst complex, plays specific roles in cell-cell adhesion and cell cycle arrest. However, the mechanism by which Sec6 regulates the NF-κB signaling pathway is unknown. We demonstrated that Sec6 knockdown inhibited the degradation of IκBα and delayed the nucleus-cytoplasm translocation of p65 in HeLa cells transfected with Sec6 siRNAs after treatment with tumor necrosis factor alpha (TNF-α). Furthermore, the binding of p65 and cAMP response element binding protein (CREB) binding protein (CBP) or p300 decreased and NF-κB related genes which were inhibitors of NF-κB alpha (IκBα), A20, B cell lymphoma protein 2 (Bcl-2), and monocyte chemoattractant protein-1 (MCP-1) were low in cells transfected with Sec6 siRNAs in response to TNF-α stimulation. Sec6 knockdown decreased the expression of p90RSKs and the phosphorylation of ERK or p90RSK1 at Ser380 or IκBα at Ser32. The present study suggests that Sec6 regulates NF-κB transcriptional activity via the control of the phosphorylation of IκBα, p90RSK1, and ERK.
Collapse
Affiliation(s)
- Toshiaki Tanaka
- Department of Anatomy and Cell Biology, School of Medicine, Yamagata University, 2-2-2 Iidanishi, Yamagata, Japan.,Department of Dentistry, Oral and Maxillofacial Surgery, Plastic and Reconstructive Surgery, School of Medicine, Yamagata University, 2-2-2 Iidanishi, Yamagata, Japan
| | - Mitsuyoshi Iino
- Department of Dentistry, Oral and Maxillofacial Surgery, Plastic and Reconstructive Surgery, School of Medicine, Yamagata University, 2-2-2 Iidanishi, Yamagata, Japan
| |
Collapse
|
168
|
Wallach D. The cybernetics of TNF: Old views and newer ones. Semin Cell Dev Biol 2016; 50:105-14. [DOI: 10.1016/j.semcdb.2015.10.014] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Accepted: 10/09/2015] [Indexed: 01/08/2023]
|
169
|
Abstract
Atherosclerosis remains a major cause of morbidity and mortality worldwide, and a thorough understanding of the underlying pathophysiological mechanisms is crucial for the development of new therapeutic strategies. Although atherosclerosis is a systemic inflammatory disease, coronary atherosclerotic plaques are not uniformly distributed in the vascular tree. Experimental and clinical data highlight that biomechanical forces, including wall shear stress (WSS) and plaque structural stress (PSS), have an important role in the natural history of coronary atherosclerosis. Endothelial cell function is heavily influenced by changes in WSS, and longitudinal animal and human studies have shown that coronary regions with low WSS undergo increased plaque growth compared with high WSS regions. Local alterations in WSS might also promote transformation of stable to unstable plaque subtypes. Plaque rupture is determined by the balance between PSS and material strength, with plaque composition having a profound effect on PSS. Prospective clinical studies are required to ascertain whether integrating mechanical parameters with medical imaging can improve our ability to identify patients at highest risk of rapid disease progression or sudden cardiac events.
Collapse
|
170
|
Recruitment of A20 by the C-terminal domain of NEMO suppresses NF-κB activation and autoinflammatory disease. Proc Natl Acad Sci U S A 2016; 113:1612-7. [PMID: 26802121 DOI: 10.1073/pnas.1518163113] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Receptor-induced NF-κB activation is controlled by NEMO, the NF-κB essential modulator. Hypomorphic NEMO mutations result in X-linked ectodermal dysplasia with anhidrosis and immunodeficiency, also referred to as NEMO syndrome. Here we describe a distinct group of patients with NEMO C-terminal deletion (ΔCT-NEMO) mutations. Individuals harboring these mutations develop inflammatory skin and intestinal disease in addition to ectodermal dysplasia with anhidrosis and immunodeficiency. Both primary cells from these patients, as well as reconstituted cell lines with this deletion, exhibited increased IκB kinase (IKK) activity and production of proinflammatory cytokines. Unlike previously described loss-of-function mutations, ΔCT-NEMO mutants promoted increased NF-κB activation in response to TNF and Toll-like receptor stimulation. Investigation of the underlying mechanisms revealed impaired interactions with A20, a negative regulator of NF-κB activation, leading to prolonged accumulation of K63-ubiquitinated RIP within the TNFR1 signaling complex. Recruitment of A20 to the C-terminal domain of NEMO represents a novel mechanism limiting NF-κB activation by NEMO, and its absence results in autoinflammatory disease.
Collapse
|
171
|
Liu XF, Jie C, Zhang Z, Yan S, Wang JJ, Wang X, Kurian S, Salomon DR, Abecassis M, Hummel M. Transplant-induced reactivation of murine cytomegalovirus immediate early gene expression is associated with recruitment of NF-κB and AP-1 to the major immediate early promoter. J Gen Virol 2016; 97:941-954. [PMID: 26795571 DOI: 10.1099/jgv.0.000407] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Reactivation of latent human cytomegalovirus is a significant infectious complication of organ transplantation and current therapies target viral replication once reactivation of latent virus has already occurred. The specific molecular pathways that activate viral gene expression in response to transplantation are not well understood. Our studies aim to identify these factors, with the goal of developing novel therapies that prevent transcriptional reactivation in transplant recipients. Murine cytomegalovirus (MCMV) is a valuable model for studying latency and reactivation of CMV in vivo. We previously demonstrated that transplantation of MCMV-latently infected kidneys into allogeneic recipients induces reactivation of immediate early (IE) gene expression and epigenetic reprogramming of the major immediate early promoter (MIEP) within 48 h. We hypothesize that these events are mediated by activation of signalling pathways that lead to binding of transcription factors to the MIEP, including AP-1 and NF-κB. Here we show that transplantation induces rapid activation of several members of the AP-1 and NF-κB transcription factor family and we demonstrate that canonical NF-κB (p65/p50), the junD component of AP-1, and nucleosome remodelling complexes are recruited to the MIEP following transplantation. Proteomic analysis of recipient plasma and transcriptome analysis of kidney RNA identified five extracellular ligands, including TNF, IL-1β, IL-18, CD40L and IL-6, and three intracellular signalling pathways associated with reactivation of IE gene expression. Identification of the factors that mediate activation of these signalling pathways may eventually lead to new therapies to prevent reactivation of CMV and its sequelae.
Collapse
Affiliation(s)
- Xue-Feng Liu
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Chunfa Jie
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Zheng Zhang
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Shixian Yan
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Jiao-Jing Wang
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Xueqiong Wang
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Sunil Kurian
- Department of Molecular and Experimental Medicine, The Scripps Research Institute, LaJolla, CA, USA
| | - Daniel R Salomon
- Department of Molecular and Experimental Medicine, The Scripps Research Institute, LaJolla, CA, USA
| | - Michael Abecassis
- Department of Microbiology and Immunology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Mary Hummel
- Department of Microbiology and Immunology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| |
Collapse
|
172
|
Nicola JP, Peyret V, Nazar M, Romero JM, Lucero AM, Montesinos MDM, Bocco JL, Pellizas CG, Masini-Repiso AM. S-Nitrosylation of NF-κB p65 Inhibits TSH-Induced Na(+)/I(-) Symporter Expression. Endocrinology 2015; 156:4741-54. [PMID: 26587909 DOI: 10.1210/en.2015-1192] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Nitric oxide (NO) is a ubiquitous signaling molecule involved in a wide variety of cellular physiological processes. In thyroid cells, NO-synthase III-endogenously produced NO reduces TSH-stimulated thyroid-specific gene expression, suggesting a potential autocrine role of NO in modulating thyroid function. Further studies indicate that NO induces thyroid dedifferentiation, because NO donors repress TSH-stimulated iodide (I(-)) uptake. Here, we investigated the molecular mechanism underlying the NO-inhibited Na(+)/I(-) symporter (NIS)-mediated I(-) uptake in thyroid cells. We showed that NO donors reduce I(-) uptake in a concentration-dependent manner, which correlates with decreased NIS protein expression. NO-reduced I(-) uptake results from transcriptional repression of NIS gene rather than posttranslational modifications reducing functional NIS expression at the plasma membrane. We observed that NO donors repress TSH-induced NIS gene expression by reducing the transcriptional activity of the nuclear factor-κB subunit p65. NO-promoted p65 S-nitrosylation reduces p65-mediated transactivation of the NIS promoter in response to TSH stimulation. Overall, our data are consistent with the notion that NO plays a role as an inhibitory signal to counterbalance TSH-stimulated nuclear factor-κB activation, thus modulating thyroid hormone biosynthesis.
Collapse
Affiliation(s)
- Juan Pablo Nicola
- Centro de Investigaciones en Bioquímica Clínica e Inmunología (J.P.N., V.P., M.N., A.M.L., M.d.M.M., J.L.B., C.G.P., A.M.M.-R.) and Centro de Investigaciones en Química Biológica (J.M.R.), Consejo Nacional de Investigaciones Científicas y Técnicas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba 5000, Argentina
| | - Victoria Peyret
- Centro de Investigaciones en Bioquímica Clínica e Inmunología (J.P.N., V.P., M.N., A.M.L., M.d.M.M., J.L.B., C.G.P., A.M.M.-R.) and Centro de Investigaciones en Química Biológica (J.M.R.), Consejo Nacional de Investigaciones Científicas y Técnicas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba 5000, Argentina
| | - Magalí Nazar
- Centro de Investigaciones en Bioquímica Clínica e Inmunología (J.P.N., V.P., M.N., A.M.L., M.d.M.M., J.L.B., C.G.P., A.M.M.-R.) and Centro de Investigaciones en Química Biológica (J.M.R.), Consejo Nacional de Investigaciones Científicas y Técnicas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba 5000, Argentina
| | - Jorge Miguel Romero
- Centro de Investigaciones en Bioquímica Clínica e Inmunología (J.P.N., V.P., M.N., A.M.L., M.d.M.M., J.L.B., C.G.P., A.M.M.-R.) and Centro de Investigaciones en Química Biológica (J.M.R.), Consejo Nacional de Investigaciones Científicas y Técnicas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba 5000, Argentina
| | - Ariel Maximiliano Lucero
- Centro de Investigaciones en Bioquímica Clínica e Inmunología (J.P.N., V.P., M.N., A.M.L., M.d.M.M., J.L.B., C.G.P., A.M.M.-R.) and Centro de Investigaciones en Química Biológica (J.M.R.), Consejo Nacional de Investigaciones Científicas y Técnicas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba 5000, Argentina
| | - María del Mar Montesinos
- Centro de Investigaciones en Bioquímica Clínica e Inmunología (J.P.N., V.P., M.N., A.M.L., M.d.M.M., J.L.B., C.G.P., A.M.M.-R.) and Centro de Investigaciones en Química Biológica (J.M.R.), Consejo Nacional de Investigaciones Científicas y Técnicas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba 5000, Argentina
| | - José Luis Bocco
- Centro de Investigaciones en Bioquímica Clínica e Inmunología (J.P.N., V.P., M.N., A.M.L., M.d.M.M., J.L.B., C.G.P., A.M.M.-R.) and Centro de Investigaciones en Química Biológica (J.M.R.), Consejo Nacional de Investigaciones Científicas y Técnicas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba 5000, Argentina
| | - Claudia Gabriela Pellizas
- Centro de Investigaciones en Bioquímica Clínica e Inmunología (J.P.N., V.P., M.N., A.M.L., M.d.M.M., J.L.B., C.G.P., A.M.M.-R.) and Centro de Investigaciones en Química Biológica (J.M.R.), Consejo Nacional de Investigaciones Científicas y Técnicas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba 5000, Argentina
| | - Ana María Masini-Repiso
- Centro de Investigaciones en Bioquímica Clínica e Inmunología (J.P.N., V.P., M.N., A.M.L., M.d.M.M., J.L.B., C.G.P., A.M.M.-R.) and Centro de Investigaciones en Química Biológica (J.M.R.), Consejo Nacional de Investigaciones Científicas y Técnicas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba 5000, Argentina
| |
Collapse
|
173
|
Herrington FD, Carmody RJ, Goodyear CS. Modulation of NF-κB Signaling as a Therapeutic Target in Autoimmunity. ACTA ACUST UNITED AC 2015; 21:223-42. [PMID: 26597958 DOI: 10.1177/1087057115617456] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Accepted: 10/26/2015] [Indexed: 01/04/2023]
Abstract
Autoimmune diseases arise from the loss of tolerance to endogenous self-antigens, resulting in a heterogeneous range of chronic conditions that cause considerable morbidity and mortality worldwide. In Western countries, over 5% of the population is affected by some form of autoimmune disease, with enhanced or inappropriate activation of nuclear factor (NF)-κB implicated in a number of these conditions. Although treatment strategies for autoimmunity have improved significantly in recent years, current therapeutics are still not capable of achieving satisfactory disease management in all patients, and as such, the therapeutic modulation of NF-κB is an attractive target in autoimmunity. To date, no NF-κB inhibitors have progressed to the clinic for the treatment of autoimmunity, but a variety of promising approaches targeting multiple stages of the NF-κB pathway are currently being explored. This review focuses on the current strategies being investigated for the inhibition of the NF-κB pathway in autoimmune diseases and considers potential future strategies for the therapeutic targeting of this crucial transcription factor.
Collapse
Affiliation(s)
- Felicity D Herrington
- University of Glasgow, Institute of Infection, Immunity and Inflammation, Glasgow, UK
| | - Ruaidhrí J Carmody
- University of Glasgow, Institute of Infection, Immunity and Inflammation, Glasgow, UK
| | - Carl S Goodyear
- University of Glasgow, Institute of Infection, Immunity and Inflammation, Glasgow, UK GLAZgo Discovery Centre, University of Glasgow, Institute of Infection, Immunity and Inflammation, Glasgow, UK
| |
Collapse
|
174
|
Cahill KE, Morshed RA, Yamini B. Nuclear factor-κB in glioblastoma: insights into regulators and targeted therapy. Neuro Oncol 2015; 18:329-39. [PMID: 26534766 DOI: 10.1093/neuonc/nov265] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Accepted: 09/24/2015] [Indexed: 12/14/2022] Open
Abstract
Nuclear factor-κB (NF-κB) is a ubiquitous transcription factor that regulates multiple aspects of cancer formation, growth, and treatment response. Glioblastoma (GBM), the most common primary malignant tumor of the central nervous system, is characterized by molecular heterogeneity, resistance to therapy, and high NF-κB activity. In this review, we examine the mechanisms by which oncogenic pathways active in GBM impinge on the NF-κB system, discuss the role of NF-κB signaling in regulating the phenotypic properties that promote GBM and, finally, review the components of the NF-κB pathway that have been targeted for treatment in both preclinical studies and clinical trials. While a direct role for NF-κB in gliomagenesis has not been reported, the importance of this transcription factor in the overall malignant phenotype suggests that more rational and specific targeting of NF-κB-dependent pathways can make a significant contribution to the management of GBM.
Collapse
Affiliation(s)
- Kirk E Cahill
- Section of Neurosurgery, Department of Surgery, University of Chicago, Chicago, Illinois
| | - Ramin A Morshed
- Section of Neurosurgery, Department of Surgery, University of Chicago, Chicago, Illinois
| | - Bakhtiar Yamini
- Section of Neurosurgery, Department of Surgery, University of Chicago, Chicago, Illinois
| |
Collapse
|
175
|
Gudipaty SA, McNamara RP, Morton EL, D'Orso I. PPM1G Binds 7SK RNA and Hexim1 To Block P-TEFb Assembly into the 7SK snRNP and Sustain Transcription Elongation. Mol Cell Biol 2015; 35:3810-28. [PMID: 26324325 PMCID: PMC4609742 DOI: 10.1128/mcb.00226-15] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Revised: 04/11/2015] [Accepted: 08/19/2015] [Indexed: 12/31/2022] Open
Abstract
Transcription elongation programs are vital for the precise regulation of several biological processes. One key regulator of such programs is the P-TEFb kinase, which phosphorylates RNA polymerase II (Pol II) once released from the inhibitory 7SK small nuclear ribonucleoprotein (snRNP) complex. Although mechanisms of P-TEFb release from the snRNP are becoming clearer, how P-TEFb remains in the 7SK-unbound state to sustain transcription elongation programs remains unknown. Here we report that the PPM1G phosphatase (inducibly recruited by nuclear factor κB [NF-κB] to target promoters) directly binds 7SK RNA and the kinase inhibitor Hexim1 once P-TEFb has been released from the 7SK snRNP. This dual binding activity of PPM1G blocks P-TEFb reassembly onto the snRNP to sustain NF-κB-mediated Pol II transcription in response to DNA damage. Notably, the PPM1G-7SK RNA interaction is direct, kinetically follows the recruitment of PPM1G to promoters to activate NF-κB transcription, and is reversible, since the complex disassembles before resolution of the program. Strikingly, we found that the ataxia telangiectasia mutated (ATM) kinase regulates the interaction between PPM1G and the 7SK snRNP through site-specific PPM1G phosphorylation. The precise and temporally regulated interaction of a cellular enzyme and a noncoding RNA provides a new paradigm for simultaneously controlling the activation and maintenance of inducible transcription elongation programs.
Collapse
Affiliation(s)
- Swapna Aravind Gudipaty
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Ryan P McNamara
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Emily L Morton
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Iván D'Orso
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| |
Collapse
|
176
|
Hochrainer K, Pejanovic N, Olaseun VA, Zhang S, Iadecola C, Anrather J. The ubiquitin ligase HERC3 attenuates NF-κB-dependent transcription independently of its enzymatic activity by delivering the RelA subunit for degradation. Nucleic Acids Res 2015; 43:9889-904. [PMID: 26476452 PMCID: PMC4787756 DOI: 10.1093/nar/gkv1064] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 10/06/2015] [Indexed: 11/21/2022] Open
Abstract
Activation of NF-κB-dependent transcription represents an important hallmark of inflammation. While the acute inflammatory response is per se beneficial, it can become deleterious if its spatial and temporal profile is not tightly controlled. Classically, NF-κB activity is limited by cytoplasmic retention of the NF-κB dimer through binding to inhibitory IκB proteins. However, increasing evidence suggests that NF-κB activity can also be efficiently contained by direct ubiquitination of NF-κB subunits. Here, we identify the HECT-domain ubiquitin ligase HERC3 as novel negative regulator of NF-κB activity. We find that HERC3 restricts NF-κB nuclear import and DNA binding without affecting IκBα degradation. Instead HERC3 indirectly binds to the NF-κB RelA subunit after liberation from IκBα inhibitor leading to its ubiquitination and protein destabilization. Remarkably, the regulation of RelA activity by HERC3 is independent of its inherent ubiquitin ligase activity. Rather, we show that HERC3 and RelA are part of a multi-protein complex containing the proteasome as well as the ubiquitin-like protein ubiquilin-1 (UBQLN1). We present evidence that HERC3 and UBQLN1 provide a link between NF-κB RelA and the 26S proteasome, thereby facilitating RelA protein degradation. Our findings establish HERC3 as novel candidate regulating the inflammatory response initiated by NF-κB.
Collapse
Affiliation(s)
- Karin Hochrainer
- Feil Family Brain and Mind Research Institute, Weill Cornell Medical College, New York, NY10065, USA
| | - Nadja Pejanovic
- Feil Family Brain and Mind Research Institute, Weill Cornell Medical College, New York, NY10065, USA Instituto Gulbenkian de Ciência, Apartado 14, Oeiras, Portugal
| | | | - Sheng Zhang
- Institute of Biotechnology and Life Sciences Biotechnologies, Cornell University, Ithaca, NY14853, USA
| | - Costantino Iadecola
- Feil Family Brain and Mind Research Institute, Weill Cornell Medical College, New York, NY10065, USA
| | - Josef Anrather
- Feil Family Brain and Mind Research Institute, Weill Cornell Medical College, New York, NY10065, USA
| |
Collapse
|
177
|
Chen J, Gu J, Feng J, Liu Y, Xue Q, Ni T, Wang Z, Jia L, Mao G, Ji L. TAB3 overexpression promotes cell proliferation in non-small cell lung cancer and mediates chemoresistance to CDDP in A549 cells via the NF-κB pathway. Tumour Biol 2015; 37:3851-61. [DOI: 10.1007/s13277-015-3896-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2015] [Accepted: 08/05/2015] [Indexed: 02/05/2023] Open
|
178
|
Philipson CW, Bassaganya-Riera J, Viladomiu M, Kronsteiner B, Abedi V, Hoops S, Michalak P, Kang L, Girardin SE, Hontecillas R. Modeling the Regulatory Mechanisms by Which NLRX1 Modulates Innate Immune Responses to Helicobacter pylori Infection. PLoS One 2015; 10:e0137839. [PMID: 26367386 PMCID: PMC4569576 DOI: 10.1371/journal.pone.0137839] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Accepted: 08/22/2015] [Indexed: 12/15/2022] Open
Abstract
Helicobacter pylori colonizes half of the world’s population as the dominant member of the gastric microbiota resulting in a lifelong chronic infection. Host responses toward the bacterium can result in asymptomatic, pathogenic or even favorable health outcomes; however, mechanisms underlying the dual role of H. pylori as a commensal versus pathogenic organism are not well characterized. Recent evidence suggests mononuclear phagocytes are largely involved in shaping dominant immunity during infection mediating the balance between host tolerance and succumbing to overt disease. We combined computational modeling, bioinformatics and experimental validation in order to investigate interactions between macrophages and intracellular H. pylori. Global transcriptomic analysis on bone marrow-derived macrophages (BMDM) in a gentamycin protection assay at six time points unveiled the presence of three sequential host response waves: an early transient regulatory gene module followed by sustained and late effector responses. Kinetic behaviors of pattern recognition receptors (PRRs) are linked to differential expression of spatiotemporal response waves and function to induce effector immunity through extracellular and intracellular detection of H. pylori. We report that bacterial interaction with the host intracellular environment caused significant suppression of regulatory NLRC3 and NLRX1 in a pattern inverse to early regulatory responses. To further delineate complex immune responses and pathway crosstalk between effector and regulatory PRRs, we built a computational model calibrated using time-series RNAseq data. Our validated computational hypotheses are that: 1) NLRX1 expression regulates bacterial burden in macrophages; and 2) early host response cytokines down-regulate NLRX1 expression through a negative feedback circuit. This paper applies modeling approaches to characterize the regulatory role of NLRX1 in mechanisms of host tolerance employed by macrophages to respond to and/or to co-exist with intracellular H. pylori.
Collapse
Affiliation(s)
- Casandra W. Philipson
- Center for Modeling Immunity to Enteric Pathogens, Virginia Bioinformatics Institute at Virginia Tech, Blacksburg, VA, United States of America
- Nutritional Immunology and Molecular Medicine Laboratory, Virginia Bioinformatics Institute at Virginia Tech, Blacksburg, VA, United States of America
| | - Josep Bassaganya-Riera
- Center for Modeling Immunity to Enteric Pathogens, Virginia Bioinformatics Institute at Virginia Tech, Blacksburg, VA, United States of America
- Nutritional Immunology and Molecular Medicine Laboratory, Virginia Bioinformatics Institute at Virginia Tech, Blacksburg, VA, United States of America
- Virginia-Maryland Regional College of Veterinary Medicine, Blacksburg, VA, United States of America
| | - Monica Viladomiu
- Center for Modeling Immunity to Enteric Pathogens, Virginia Bioinformatics Institute at Virginia Tech, Blacksburg, VA, United States of America
- Nutritional Immunology and Molecular Medicine Laboratory, Virginia Bioinformatics Institute at Virginia Tech, Blacksburg, VA, United States of America
| | - Barbara Kronsteiner
- Center for Modeling Immunity to Enteric Pathogens, Virginia Bioinformatics Institute at Virginia Tech, Blacksburg, VA, United States of America
- Nutritional Immunology and Molecular Medicine Laboratory, Virginia Bioinformatics Institute at Virginia Tech, Blacksburg, VA, United States of America
| | - Vida Abedi
- Center for Modeling Immunity to Enteric Pathogens, Virginia Bioinformatics Institute at Virginia Tech, Blacksburg, VA, United States of America
- Nutritional Immunology and Molecular Medicine Laboratory, Virginia Bioinformatics Institute at Virginia Tech, Blacksburg, VA, United States of America
| | - Stefan Hoops
- Center for Modeling Immunity to Enteric Pathogens, Virginia Bioinformatics Institute at Virginia Tech, Blacksburg, VA, United States of America
- Nutritional Immunology and Molecular Medicine Laboratory, Virginia Bioinformatics Institute at Virginia Tech, Blacksburg, VA, United States of America
| | - Pawel Michalak
- Center for Modeling Immunity to Enteric Pathogens, Virginia Bioinformatics Institute at Virginia Tech, Blacksburg, VA, United States of America
| | - Lin Kang
- Center for Modeling Immunity to Enteric Pathogens, Virginia Bioinformatics Institute at Virginia Tech, Blacksburg, VA, United States of America
| | - Stephen E. Girardin
- Laboratory of Medicine & Pathobiology, University of Toronto, Toronto, Ontario, Canada
| | - Raquel Hontecillas
- Center for Modeling Immunity to Enteric Pathogens, Virginia Bioinformatics Institute at Virginia Tech, Blacksburg, VA, United States of America
- Nutritional Immunology and Molecular Medicine Laboratory, Virginia Bioinformatics Institute at Virginia Tech, Blacksburg, VA, United States of America
- * E-mail:
| |
Collapse
|
179
|
Baig MS, Zaichick SV, Mao M, de Abreu AL, Bakhshi FR, Hart PC, Saqib U, Deng J, Chatterjee S, Block ML, Vogel SM, Malik AB, Consolaro MEL, Christman JW, Minshall RD, Gantner BN, Bonini MG. NOS1-derived nitric oxide promotes NF-κB transcriptional activity through inhibition of suppressor of cytokine signaling-1. ACTA ACUST UNITED AC 2015; 212:1725-38. [PMID: 26324446 PMCID: PMC4577833 DOI: 10.1084/jem.20140654] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Accepted: 08/06/2015] [Indexed: 11/04/2022]
Abstract
The NF-κB pathway is central to the regulation of inflammation. Here, we demonstrate that the low-output nitric oxide (NO) synthase 1 (NOS1 or nNOS) plays a critical role in the inflammatory response by promoting the activity of NF-κB. Specifically, NOS1-derived NO production in macrophages leads to proteolysis of suppressor of cytokine signaling 1 (SOCS1), alleviating its repression of NF-κB transcriptional activity. As a result, NOS1(-/-) mice demonstrate reduced cytokine production, lung injury, and mortality when subjected to two different models of sepsis. Isolated NOS1(-/-) macrophages demonstrate similar defects in proinflammatory transcription on challenge with Gram-negative bacterial LPS. Consistently, we found that activated NOS1(-/-) macrophages contain increased SOCS1 protein and decreased levels of p65 protein compared with wild-type cells. NOS1-dependent S-nitrosation of SOCS1 impairs its binding to p65 and targets SOCS1 for proteolysis. Treatment of NOS1(-/-) cells with exogenous NO rescues both SOCS1 degradation and stabilization of p65 protein. Point mutation analysis demonstrated that both Cys147 and Cys179 on SOCS1 are required for its NO-dependent degradation. These findings demonstrate a fundamental role for NOS1-derived NO in regulating TLR4-mediated inflammatory gene transcription, as well as the intensity and duration of the resulting host immune response.
Collapse
Affiliation(s)
- Mirza Saqib Baig
- Department of Medicine, Department of Pharmacology, Department of Anesthesiology, and Department of Pathology, University of Illinois College of Medicine, Chicago, IL 60607 Department of Medicine, Department of Pharmacology, Department of Anesthesiology, and Department of Pathology, University of Illinois College of Medicine, Chicago, IL 60607
| | - Sofia V Zaichick
- Department of Medicine, Department of Pharmacology, Department of Anesthesiology, and Department of Pathology, University of Illinois College of Medicine, Chicago, IL 60607 Department of Medicine, Department of Pharmacology, Department of Anesthesiology, and Department of Pathology, University of Illinois College of Medicine, Chicago, IL 60607
| | - Mao Mao
- Department of Medicine, Department of Pharmacology, Department of Anesthesiology, and Department of Pathology, University of Illinois College of Medicine, Chicago, IL 60607 Department of Medicine, Department of Pharmacology, Department of Anesthesiology, and Department of Pathology, University of Illinois College of Medicine, Chicago, IL 60607
| | - Andre L de Abreu
- Department of Medicine, Department of Pharmacology, Department of Anesthesiology, and Department of Pathology, University of Illinois College of Medicine, Chicago, IL 60607 Department of Medicine, Department of Pharmacology, Department of Anesthesiology, and Department of Pathology, University of Illinois College of Medicine, Chicago, IL 60607 Programa de Biociencias Aplicadas a Farmacia (PBF), Universidade Estadual de Maringa, Maringa 87020-900, Brazil
| | - Farnaz R Bakhshi
- Department of Medicine, Department of Pharmacology, Department of Anesthesiology, and Department of Pathology, University of Illinois College of Medicine, Chicago, IL 60607
| | - Peter C Hart
- Department of Medicine, Department of Pharmacology, Department of Anesthesiology, and Department of Pathology, University of Illinois College of Medicine, Chicago, IL 60607 Department of Anatomy and Cell Biology, Stark Neurosciences Research Institute, Indiana University, Indianapolis, IN 46202
| | - Uzma Saqib
- Department of Medicine, Department of Pharmacology, Department of Anesthesiology, and Department of Pathology, University of Illinois College of Medicine, Chicago, IL 60607
| | - Jing Deng
- Department of Medicine, Department of Pharmacology, Department of Anesthesiology, and Department of Pathology, University of Illinois College of Medicine, Chicago, IL 60607
| | - Saurabh Chatterjee
- Department of Medicine, Department of Pharmacology, Department of Anesthesiology, and Department of Pathology, University of Illinois College of Medicine, Chicago, IL 60607
| | - Michelle L Block
- Department of Medicine, Department of Pharmacology, Department of Anesthesiology, and Department of Pathology, University of Illinois College of Medicine, Chicago, IL 60607
| | - Stephen M Vogel
- Department of Medicine, Department of Pharmacology, Department of Anesthesiology, and Department of Pathology, University of Illinois College of Medicine, Chicago, IL 60607
| | - Asrar B Malik
- Department of Medicine, Department of Pharmacology, Department of Anesthesiology, and Department of Pathology, University of Illinois College of Medicine, Chicago, IL 60607
| | - Marcia E L Consolaro
- Programa de Biociencias Aplicadas a Farmacia (PBF), Universidade Estadual de Maringa, Maringa 87020-900, Brazil
| | - John W Christman
- Department of Medicine, Department of Pharmacology, Department of Anesthesiology, and Department of Pathology, University of Illinois College of Medicine, Chicago, IL 60607
| | - Richard D Minshall
- Department of Medicine, Department of Pharmacology, Department of Anesthesiology, and Department of Pathology, University of Illinois College of Medicine, Chicago, IL 60607 Department of Environmental Health Sciences, University of South Carolina, Columbia, SC 29208
| | - Benjamin N Gantner
- Department of Medicine, Department of Pharmacology, Department of Anesthesiology, and Department of Pathology, University of Illinois College of Medicine, Chicago, IL 60607
| | - Marcelo G Bonini
- Department of Medicine, Department of Pharmacology, Department of Anesthesiology, and Department of Pathology, University of Illinois College of Medicine, Chicago, IL 60607 Department of Medicine, Department of Pharmacology, Department of Anesthesiology, and Department of Pathology, University of Illinois College of Medicine, Chicago, IL 60607 Department of Anatomy and Cell Biology, Stark Neurosciences Research Institute, Indiana University, Indianapolis, IN 46202
| |
Collapse
|
180
|
Lee SU, Sung MH, Ryu HW, Lee J, Kim HS, In HJ, Ahn KS, Lee HJ, Lee HK, Shin DH, Lee Y, Hong ST, Oh SR. Verproside inhibits TNF-α-induced MUC5AC expression through suppression of the TNF-α/NF-κB pathway in human airway epithelial cells. Cytokine 2015; 77:168-75. [PMID: 26318254 DOI: 10.1016/j.cyto.2015.08.262] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 08/21/2015] [Accepted: 08/24/2015] [Indexed: 11/16/2022]
Abstract
Airway mucus secretion is an essential innate immune response for host protection. However, overproduction and hypersecretion of mucus, mainly composed of MUC5AC, are significant risk factors in asthma and chronic obstructive pulmonary disease (COPD) patients. Previously, we reported that verproside, a catalpol derivative iridoid glycoside isolated from Pseudolysimachion rotundum var. subintegrum, is a potent anti-asthmatic candidate drug in vivo. However, the molecular mechanisms underlying the pharmacological actions of verproside remain unknown. Here, we found that verproside significantly reduces the expression levels of tumor necrosis factor alpha (TNF-α)-induced MUC5AC mRNA and protein by inhibiting both nuclear factor kappa B (NF-κB) transcriptional activity and the phosphorylation of its upstream effectors such as IκB kinase (IKK)β, IκBα, and TGF-β-activated kinase 1 (TAK1) in NCI-H292 cells. Moreover, verproside attenuated TNF-α-induced MUC5AC transcription more effectively when combined with an IKK (BAY11-7082) or a TAK1 (5z-7-oxozeaenol) inhibitor than when administered alone. Importantly, we demonstrated that verproside negatively modulates the formation of the TNF-α-receptor (TNFR) 1 signaling complex [TNF-RSC; TNFR1-recruited TNFR1-associated death domain protein (TRADD), TNFR-associated factor 2 (TRAF2), receptor-interacting protein kinase 1 (RIP1), and TAK1], the most upstream signaling factor of NF-κB signaling. In silico molecular docking studies show that verproside binds between TRADD and TRAF2 subunits. Altogether, these results suggest that verproside could be a good therapeutic candidate for treatment of inflammatory airway diseases such as asthma and COPD by blocking the TNF-α/NF-κB signaling pathway.
Collapse
Affiliation(s)
- Su Ui Lee
- Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, 30 Yeongudanji-ro, Ochang-eup, Cheongwon-gu, Cheongju-si, Chungbuk 363-883, Republic of Korea
| | - Min Hee Sung
- Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, 30 Yeongudanji-ro, Ochang-eup, Cheongwon-gu, Cheongju-si, Chungbuk 363-883, Republic of Korea
| | - Hyung Won Ryu
- Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, 30 Yeongudanji-ro, Ochang-eup, Cheongwon-gu, Cheongju-si, Chungbuk 363-883, Republic of Korea
| | - Jinhyuk Lee
- Korean Bioinformation Center (KOBIC), Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 305-806, Republic of Korea
| | - Hui-Seong Kim
- Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, 30 Yeongudanji-ro, Ochang-eup, Cheongwon-gu, Cheongju-si, Chungbuk 363-883, Republic of Korea
| | - Hyun Ju In
- Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, 30 Yeongudanji-ro, Ochang-eup, Cheongwon-gu, Cheongju-si, Chungbuk 363-883, Republic of Korea
| | - Kyung-Seop Ahn
- Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, 30 Yeongudanji-ro, Ochang-eup, Cheongwon-gu, Cheongju-si, Chungbuk 363-883, Republic of Korea
| | - Hyun-Jun Lee
- Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, 30 Yeongudanji-ro, Ochang-eup, Cheongwon-gu, Cheongju-si, Chungbuk 363-883, Republic of Korea
| | - Hyeong-Kyu Lee
- Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, 30 Yeongudanji-ro, Ochang-eup, Cheongwon-gu, Cheongju-si, Chungbuk 363-883, Republic of Korea
| | - Dae-Hee Shin
- Central R&D Institute, Yungjin Pharm. Co., Ltd., Suwon 443-270, Republic of Korea
| | - Yongnam Lee
- Central R&D Institute, Yungjin Pharm. Co., Ltd., Suwon 443-270, Republic of Korea
| | - Sung-Tae Hong
- Department of Biological Sciences, Korea Advanced Institute of Science & Technology, Guseong-Dong, Yusong-Gu, Daejeon 305-701, Republic of Korea.
| | - Sei-Ryang Oh
- Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, 30 Yeongudanji-ro, Ochang-eup, Cheongwon-gu, Cheongju-si, Chungbuk 363-883, Republic of Korea.
| |
Collapse
|
181
|
Zhao XD, Lu YY, Guo H, Xie HH, He LJ, Shen GF, Zhou JF, Li T, Hu SJ, Zhou L, Han YN, Liang SL, Wang X, Wu KC, Shi YQ, Nie YZ, Fan DM. MicroRNA-7/NF-κB signaling regulatory feedback circuit regulates gastric carcinogenesis. J Cell Biol 2015; 210:613-27. [PMID: 26261179 PMCID: PMC4539989 DOI: 10.1083/jcb.201501073] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Accepted: 06/30/2015] [Indexed: 01/27/2023] Open
Abstract
RELA and FOS are targets of miR-7 in gastric cancer cells and the miR-7/IKKε/RELA reciprocal feedback loop is important for gastric cancer induced by H. pylori infection. MicroRNAs play essential roles in gene expression regulation during carcinogenesis. Here, we investigated the role of miR-7 and the mechanism by which it is dysregulated in gastric cancer (GC). We used genome-wide screenings and identified RELA and FOS as novel targets of miR-7. Overexpression of miR-7 repressed RELA and FOS expression and prevented GC cell proliferation and tumorigenesis. These effects were clinically relevant, as low miR-7 expression was correlated with high RELA and FOS expression and poor survival in GC patients. Intriguingly, we found that miR-7 indirectly regulated RELA activation by targeting the IκB kinase IKKε. Furthermore, IKKε and RELA can repress miR-7 transcription, which forms a feedback circuit between miR-7 and nuclear factor κB (NF-κB) signaling. Additionally, we demonstrate that down-regulation of miR-7 may occur as a result of the aberrant activation of NF-κB signaling by Helicobacter pylori infection. These findings suggest that miR-7 may serve as an important regulator in GC development and progression.
Collapse
Affiliation(s)
- Xiao-Di Zhao
- State Key Laboratory of Cancer Biology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Yuan-Yuan Lu
- State Key Laboratory of Cancer Biology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Hao Guo
- State Key Laboratory of Cancer Biology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Hua-Hong Xie
- State Key Laboratory of Cancer Biology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Li-Jie He
- State Key Laboratory of Cancer Biology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China Department of Nephrology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Gao-Fei Shen
- State Key Laboratory of Cancer Biology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Jin-Feng Zhou
- State Key Laboratory of Cancer Biology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Ting Li
- State Key Laboratory of Cancer Biology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Si-Jun Hu
- State Key Laboratory of Cancer Biology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Lin Zhou
- State Key Laboratory of Cancer Biology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Ya-Nan Han
- State Key Laboratory of Cancer Biology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Shu-Li Liang
- State Key Laboratory of Cancer Biology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Xin Wang
- State Key Laboratory of Cancer Biology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Kai-Chun Wu
- State Key Laboratory of Cancer Biology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Yong-Quan Shi
- State Key Laboratory of Cancer Biology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Yong-Zhan Nie
- State Key Laboratory of Cancer Biology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Dai-Ming Fan
- State Key Laboratory of Cancer Biology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| |
Collapse
|
182
|
Wang Y, Park NY, Jang Y, Ma A, Jiang Q. Vitamin E γ-Tocotrienol Inhibits Cytokine-Stimulated NF-κB Activation by Induction of Anti-Inflammatory A20 via Stress Adaptive Response Due to Modulation of Sphingolipids. THE JOURNAL OF IMMUNOLOGY 2015; 195:126-33. [PMID: 26002975 DOI: 10.4049/jimmunol.1403149] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Accepted: 04/27/2015] [Indexed: 12/16/2022]
Abstract
NF-κB plays a central role in pathogenesis of inflammation and cancer. Many phytochemicals, including γ-tocotrienol (γTE), a natural form of vitamin E, have been shown to inhibit NF-κB activation, but the underlying mechanism has not been identified. In this study, we show that γTE inhibited cytokine-triggered activation of NF-κB and its upstream regulator TGF-β-activated kinase-1 in murine RAW 264.7 macrophages and primary bone marrow-derived macrophages. In these cells, γTE induced upregulation of A20, an inhibitor of NF-κB. Knockout of A20 partially diminished γTE's anti-NF-κB effect, but γTE increased another NF-κB inhibitor, Cezanne, in A20(-/-) cells. In search of the reason for A20 upregulation, we found that γTE treatment increased phosphorylation of translation initiation factor 2, IκBα, and JNK, indicating induction of endoplasmic reticulum stress. Liquid chromatography-tandem mass spectrometry analyses revealed that γTE modulated sphingolipids, including enhancement of intracellular dihydroceramides, sphingoid bases in de novo synthesis of the sphingolipid pathway. Chemical inhibition of de novo sphingolipid synthesis partially reversed γTE's induction of A20 and the anti-NF-κB effect. The importance of dihydroceramide increase is further supported by the observation that C8-dihydroceramide mimicked γTE in upregulating A20, enhancing endoplasmic reticulum stress, and attenuating TNF-triggered NF-κB activation. Our study identifies a novel anti-NF-κB mechanism where A20 is induced by stress-induced adaptive response as a result of modulation of sphingolipids, and it demonstrates an immunomodulatory role of dihydrocermides.
Collapse
Affiliation(s)
- Yun Wang
- Department of Nutrition Science, Purdue University, West Lafayette, IN 47907; and
| | - Na-Young Park
- Department of Nutrition Science, Purdue University, West Lafayette, IN 47907; and
| | - Yumi Jang
- Department of Nutrition Science, Purdue University, West Lafayette, IN 47907; and
| | - Averil Ma
- Department of Medicine, University of California at San Francisco, San Francisco, CA 94143
| | - Qing Jiang
- Department of Nutrition Science, Purdue University, West Lafayette, IN 47907; and
| |
Collapse
|
183
|
Phloretin ameliorates chemokines and ICAM-1 expression via blocking of the NF-κB pathway in the TNF-α-induced HaCaT human keratinocytes. Int Immunopharmacol 2015; 27:32-7. [PMID: 25929446 DOI: 10.1016/j.intimp.2015.04.024] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Revised: 04/11/2015] [Accepted: 04/13/2015] [Indexed: 11/20/2022]
Abstract
Previous studies found that phloretin had anti-oxidant, anti-inflammatory, and anti-tumor properties. In this study, we investigated whether phloretin could suppress the production of the intercellular adhesion molecule (ICAM)-1 and chemokines through downregulation of the nuclear transcription factor kappa-B (NF-κB) and mitogen-activated protein kinase (MAPK) signaling pathways in TNF-α-stimulated HaCaT human keratinocytes. HaCaT cells were treated with phloretin and then the cells were stimulated by TNF-α. Phloretin treatment decreased the production of IL-6, IL-8, CCL5, MDC, and TARC. Phloretin decreased ICAM-1 protein and mRNA expression, and also suppressed the adhesion of monocyte THP-1 cells to inflammatory HaCaT cells. Phloretin inhibited NF-κB translocation into the nucleus and also suppressed the phosphorylation of Akt and MAPK signal. In addition, phloretin increased heme oxygenase-1 production in a concentration-dependent manner. These results demonstrated that phloretin has anti-inflammatory effects to inhibit chemokines and ICAM-1 expressions through suppression of the NF-κB and MAPK pathways in human keratinocytes.
Collapse
|
184
|
Leviton A, Gressens P, Wolkenhauer O, Dammann O. Systems approach to the study of brain damage in the very preterm newborn. Front Syst Neurosci 2015; 9:58. [PMID: 25926780 PMCID: PMC4396381 DOI: 10.3389/fnsys.2015.00058] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Accepted: 03/26/2015] [Indexed: 12/11/2022] Open
Abstract
Background: A systems approach to the study of brain damage in very preterm newborns has been lacking. Methods: In this perspective piece, we offer encephalopathy of prematurity as an example of the complexity and interrelatedness of brain-damaging molecular processes that can be initiated inflammatory phenomena. Results: Using three transcription factors, nuclear factor-kappa B (NF-κB), Notch-1, and nuclear factor erythroid 2 related factor 2 (NRF2), we show the inter-connectedness of signaling pathways activated by some antecedents of encephalopathy of prematurity. Conclusions: We hope that as biomarkers of exposures and processes leading to brain damage in the most immature newborns become more readily available, those who apply a systems approach to the study of neuroscience can be persuaded to study the pathogenesis of brain disorders in the very preterm newborn.
Collapse
Affiliation(s)
- Alan Leviton
- Neuroepidemiology Unit, Boston Children's Hospital Boston, MA, USA ; Department of Neurology, Harvard Medical School Boston, MA, USA
| | - Pierre Gressens
- Inserm, U1141 Paris, France ; Department of Perinatal Imaging and Health, Department of Division of Imaging Sciences and Biomedical Engineering, King's College London, King's Health Partners, St. Thomas' Hospital London, UK
| | - Olaf Wolkenhauer
- Department of Systems Biology and Bioinformatics, University of Rostock Rostock, Germany ; Stellenbosch Institute for Advanced Study (STIAS) Stellenbosch, South Africa
| | - Olaf Dammann
- Department of Public Health and Community Medicine, Tufts University School of Medicine Boston, MA, USA ; Perinatal Epidemiology Unit, Department of Gynecology and Obstetrics, Hannover Medical School Hannover, Germany
| |
Collapse
|
185
|
Wang W, Huang X, Xin HB, Fu M, Xue A, Wu ZH. TRAF Family Member-associated NF-κB Activator (TANK) Inhibits Genotoxic Nuclear Factor κB Activation by Facilitating Deubiquitinase USP10-dependent Deubiquitination of TRAF6 Ligase. J Biol Chem 2015; 290:13372-85. [PMID: 25861989 DOI: 10.1074/jbc.m115.643767] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Indexed: 01/26/2023] Open
Abstract
DNA damage-induced NF-κB activation plays a critical role in regulating cellular response to genotoxic stress. However, the molecular mechanisms controlling the magnitude and duration of this genotoxic NF-κB signaling cascade are poorly understood. We recently demonstrated that genotoxic NF-κB activation is regulated by reversible ubiquitination of several essential mediators involved in this signaling pathway. Here we show that TRAF family member-associated NF-κB activator (TANK) negatively regulates NF-κB activation by DNA damage via inhibiting ubiquitination of TRAF6. Despite the lack of a deubiquitination enzyme domain, TANK has been shown to negatively regulate the ubiquitination of TRAF proteins. We found TANK formed a complex with MCPIP1 (also known as ZC3H12A) and a deubiquitinase, USP10, which was essential for the USP10-dependent deubiquitination of TRAF6 and the resolution of genotoxic NF-κB activation upon DNA damage. Clustered regularly interspaced short palindromic repeats (CRISPR)/Cas9-mediated deletion of TANK in human cells significantly enhanced NF-κB activation by genotoxic treatment, resulting in enhanced cell survival and increased inflammatory cytokine production. Furthermore, we found that the TANK-MCPIP1-USP10 complex also decreased TRAF6 ubiquitination in cells treated with IL-1β or LPS. In accordance, depletion of USP10 enhanced NF-κB activation induced by IL-1β or LPS. Collectively, our data demonstrate that TANK serves as an important negative regulator of NF-κB signaling cascades induced by genotoxic stress and IL-1R/Toll-like receptor stimulation in a manner dependent on MCPIP1/USP10-mediated TRAF6 deubiquitination.
Collapse
Affiliation(s)
- Wei Wang
- From the Department of Pathology and Laboratory Medicine and Center for Cancer Research, University of Tennessee Health Science Center, Memphis, Tennessee 38163
| | - Xuan Huang
- the Institute of Translational Medicine, Nanchang University, Nanchang 330031, China
| | - Hong-Bo Xin
- the Institute of Translational Medicine, Nanchang University, Nanchang 330031, China
| | - Mingui Fu
- the Department of Basic Medical Science, University of Missouri Kansas City, Kansas City, Missouri 64108, and
| | - Aimin Xue
- the Department of Forensic Medicine, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Zhao-Hui Wu
- From the Department of Pathology and Laboratory Medicine and Center for Cancer Research, University of Tennessee Health Science Center, Memphis, Tennessee 38163,
| |
Collapse
|
186
|
Xu X, Bi DC, Li C, Fang WS, Zhou R, Li SM, Chi LL, Wan M, Shen LM. Morphological and proteomic analyses reveal that unsaturated guluronate oligosaccharide modulates multiple functional pathways in murine macrophage RAW264.7 cells. Mar Drugs 2015; 13:1798-818. [PMID: 25830683 PMCID: PMC4413188 DOI: 10.3390/md13041798] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Revised: 03/15/2015] [Accepted: 03/20/2015] [Indexed: 01/19/2023] Open
Abstract
Alginate is a natural polysaccharide extracted from various species of marine brown algae. Alginate-derived guluronate oligosaccharide (GOS) obtained by enzymatic depolymerization has various pharmacological functions. Previous studies have demonstrated that GOS can trigger the production of inducible nitric oxide synthase (iNOS)/nitric oxide (NO), reactive oxygen species (ROS) and tumor necrosis factor (TNF)-α by macrophages and that it is involved in the nuclear factor (NF)-κB and mitogen-activated protein (MAP) kinase signaling pathways. To expand upon the current knowledge regarding the molecular mechanisms associated with the GOS-induced immune response in macrophages, comparative proteomic analysis was employed together with two-dimensional electrophoresis (2-DE), matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF/TOF MS) and Western blot verification. Proteins showing significant differences in expression in GOS-treated cells were categorized into multiple functional pathways, including the NF-κB signaling pathway and pathways involved in inflammation, antioxidant activity, glycolysis, cytoskeletal processes and translational elongation. Moreover, GOS-stimulated changes in the morphologies and actin cytoskeleton organization of RAW264.7 cells were also investigated as possible adaptations to GOS. This study is the first to reveal GOS as a promising agent that can modulate the proper balance between the pro- and anti-inflammatory immune responses, and it provides new insights into pharmaceutical applications of polysaccharides.
Collapse
Affiliation(s)
- Xu Xu
- College of Life Science, Shenzhen Key Laboratory of Marine Bioresources and Ecology, Shenzhen University, Shenzhen 518060, China.
| | - De-Cheng Bi
- College of Life Science, Shenzhen Key Laboratory of Marine Bioresources and Ecology, Shenzhen University, Shenzhen 518060, China.
| | - Chao Li
- College of Life Science, Shenzhen Key Laboratory of Marine Bioresources and Ecology, Shenzhen University, Shenzhen 518060, China.
| | - Wei-Shan Fang
- College of Life Science, Shenzhen Key Laboratory of Marine Bioresources and Ecology, Shenzhen University, Shenzhen 518060, China.
| | - Rui Zhou
- College of Life Science, Shenzhen Key Laboratory of Marine Bioresources and Ecology, Shenzhen University, Shenzhen 518060, China.
| | - Shui-Ming Li
- College of Life Science, Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen University, Shenzhen 518060, China.
| | - Lian-Li Chi
- National Glycoengineering Research Center, Shandong University, Jinan 250100, China.
| | - Min Wan
- Division of Physiological Chemistry 2, Department of Medical Biochemistry and Biophysics, Karolinska Institute, Stockholm 17177, Sweden.
| | - Li-Ming Shen
- College of Life Science, Shenzhen Key Laboratory of Marine Bioresources and Ecology, Shenzhen University, Shenzhen 518060, China.
| |
Collapse
|
187
|
Liu B, Sun L, Liu Q, Gong C, Yao Y, Lv X, Lin L, Yao H, Su F, Li D, Zeng M, Song E. A cytoplasmic NF-κB interacting long noncoding RNA blocks IκB phosphorylation and suppresses breast cancer metastasis. Cancer Cell 2015; 27:370-81. [PMID: 25759022 DOI: 10.1016/j.ccell.2015.02.004] [Citation(s) in RCA: 703] [Impact Index Per Article: 78.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Revised: 12/19/2014] [Accepted: 02/10/2015] [Indexed: 02/05/2023]
Abstract
NF-κB is a critical link between inflammation and cancer, but whether long non-coding RNAs (lncRNAs) regulate its activation remains unknown. Here, we identify an NF-KappaB Interacting LncRNA (NKILA), which is upregulated by NF-κB, binds to NF-κB/IκB, and directly masks phosphorylation motifs of IκB, thereby inhibiting IKK-induced IκB phosphorylation and NF-κB activation. Unlike DNA that is dissociated from NF-κB by IκB, NKILA interacts with NF-κB/IκB to form a stable complex. Importantly, NKILA is essential to prevent over-activation of NF-κB pathway in inflammation-stimulated breast epithelial cells. Furthermore, low NKILA expression is associated with breast cancer metastasis and poor patient prognosis. Therefore, lncRNAs can directly interact with functional domains of signaling proteins, serving as a class of NF-κB modulators to suppress cancer metastasis.
Collapse
Affiliation(s)
- Bodu Liu
- Breast Tumor Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China; Key Laboratory of Malignant Tumor Gene Regulation and Target Therapy of Guangdong Higher Education Institutes, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China; Key Laboratory of Gene Engineering of Ministry of Education, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
| | - Lijuan Sun
- Breast Tumor Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China; Key Laboratory of Malignant Tumor Gene Regulation and Target Therapy of Guangdong Higher Education Institutes, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China; Key Laboratory of Gene Engineering of Ministry of Education, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
| | - Qiang Liu
- Breast Tumor Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China; Key Laboratory of Malignant Tumor Gene Regulation and Target Therapy of Guangdong Higher Education Institutes, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Chang Gong
- Breast Tumor Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China; Key Laboratory of Malignant Tumor Gene Regulation and Target Therapy of Guangdong Higher Education Institutes, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Yandan Yao
- Breast Tumor Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China; Key Laboratory of Malignant Tumor Gene Regulation and Target Therapy of Guangdong Higher Education Institutes, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Xiaobin Lv
- Breast Tumor Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China; Key Laboratory of Malignant Tumor Gene Regulation and Target Therapy of Guangdong Higher Education Institutes, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Ling Lin
- Department of Internal Medicine, The First Affiliated Hospital, Shantou University Medical College, Shantou 515041, China
| | - Herui Yao
- Breast Tumor Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China; Key Laboratory of Malignant Tumor Gene Regulation and Target Therapy of Guangdong Higher Education Institutes, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Fengxi Su
- Breast Tumor Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China; Key Laboratory of Malignant Tumor Gene Regulation and Target Therapy of Guangdong Higher Education Institutes, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Dangsheng Li
- Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 320 Yueyang Road, Shanghai 200031, China
| | - Musheng Zeng
- State Key Laboratory of Oncology in Southern China, Cancer Center, Sun Yat-sen University, Guangzhou 510060, China
| | - Erwei Song
- Breast Tumor Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China; Key Laboratory of Malignant Tumor Gene Regulation and Target Therapy of Guangdong Higher Education Institutes, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China; Key Laboratory of Gene Engineering of Ministry of Education, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China.
| |
Collapse
|
188
|
Makino A, Fujino K, Parrish NF, Honda T, Tomonaga K. Borna disease virus possesses an NF-ĸB inhibitory sequence in the nucleoprotein gene. Sci Rep 2015; 5:8696. [PMID: 25733193 PMCID: PMC4649702 DOI: 10.1038/srep08696] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Accepted: 02/02/2015] [Indexed: 02/06/2023] Open
Abstract
Borna disease virus (BDV) has a non-segmented, negative-stranded RNA genome and causes persistent infection in many animal species. Previous study has shown that the activation of the IκB kinase (IKK)/NF-κB pathway is reduced by BDV infection even in cells expressing constitutively active mutant IKK. This result suggests that BDV directly interferes with the IKK/NF-κB pathway. To elucidate the mechanism for the inhibition of NF-κB activation by BDV infection, we evaluated the cross-talk between BDV infection and the NF-κB pathway. Using Multiple EM for Motif Elicitation analysis, we found that the nucleoproteins of BDV (BDV-N) and NF-κB1 share a common ankyrin-like motif. When THP1-CD14 cells were pre-treated with the identified peptide, NF-κB activation by Toll-like receptor ligands was suppressed. The 20S proteasome assay showed that BDV-N and BDV-N-derived peptide inhibited the processing of NF-κB1 p105 into p50. Furthermore, immunoprecipitation assays showed that BDV-N interacted with NF-κB1 but not with NF-κB2, which shares no common motif with BDV-N. These results suggest BDV-N inhibits NF-κB1 processing by the 20S proteasome through its ankyrin-like peptide sequence, resulting in the suppression of IKK/NF-κB pathway activation. This inhibitory effect of BDV on the induction of the host innate immunity might provide benefits against persistent BDV infection.
Collapse
Affiliation(s)
- Akiko Makino
- 1] Department of Viral Oncology, Kyoto University, Kyoto 606-8507, Japan [2] Center for Emerging Virus Research, Institute for Virus Research, Kyoto University, Kyoto 606-8507, Japan
| | - Kan Fujino
- Department of Viral Oncology, Kyoto University, Kyoto 606-8507, Japan
| | | | - Tomoyuki Honda
- 1] Department of Viral Oncology, Kyoto University, Kyoto 606-8507, Japan [2] Department of Tumor Viruses, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
| | - Keizo Tomonaga
- 1] Department of Viral Oncology, Kyoto University, Kyoto 606-8507, Japan [2] Department of Tumor Viruses, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan [3] Department of Mammalian Regulatory Network, Graduate School of Biostudies, Kyoto University, Kyoto 606-8507, Japan
| |
Collapse
|
189
|
Uwagawa T, Yanaga K. Effect of NF-κB inhibition on chemoresistance in biliary-pancreatic cancer. Surg Today 2015; 45:1481-8. [PMID: 25673034 DOI: 10.1007/s00595-015-1129-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Accepted: 01/26/2015] [Indexed: 12/13/2022]
Abstract
Biliary cancer and pancreatic cancer are considered to be difficult diseases to cure. Although complete resection provides the only means of curing these cancers, the rate of resectability is not high. Therefore, chemotherapy is often selected in patients with advanced unresectable biliary-pancreatic cancer. Many combination chemotherapy regimens have been applied in clinical trials. However, the survival time is not satisfactory. On the other hand, most chemotherapeutic agents induce anti-apoptotic transcriptional factor nuclear factor kappa b (NF-κB) activation, and agent-induced NF-κB activation is deeply involved in the onset of chemoresistance. Recently, novel approaches to potentiating chemosensitivity in cases of biliary-pancreatic cancer using NF-κB inhibitors with cytotoxic agents have been reported, most of which comprise translational research, although some clinical trials have also been conducted. Nevertheless, to date, there is no breakthrough chemotherapy regimen for these diseases. As some reports show promising data, combination chemotherapy consisting of a NF-κB inhibitor with chemotherapeutic agents seems to improve chemosensitivity and prolong the survival time of biliary-pancreatic cancer patients.
Collapse
Affiliation(s)
- Tadashi Uwagawa
- Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan.
| | - Katsuhiko Yanaga
- Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan
| |
Collapse
|
190
|
Mothes J, Busse D, Kofahl B, Wolf J. Sources of dynamic variability in NF-κB signal transduction: a mechanistic model. Bioessays 2015; 37:452-62. [PMID: 25640005 PMCID: PMC4409097 DOI: 10.1002/bies.201400113] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The transcription factor NF-κB (p65/p50) plays a central role in the coordination of cellular responses by activating the transcription of numerous target genes. The precise role of the dynamics of NF-κB signalling in regulating gene expression is still an open question. Here, we show that besides external stimulation intracellular parameters can influence the dynamics of NF-κB. By applying mathematical modelling and bifurcation analyses, we show that NF-κB is capable of exhibiting different types of dynamics in response to the same stimulus. We identified the total NF-κB concentration and the IκBα transcription rate constant as two critical parameters that modulate the dynamics and the fold change of NF-κB. Both parameters might vary as a result of cell-to-cell variability. The regulation of the IκBα transcription rate constant, e.g. by co-factors, provides the possibility of regulating the NF-κB dynamics by crosstalk.
Collapse
Affiliation(s)
- Janina Mothes
- Max Delbrück Center for Molecular Medicine, Berlin, Germany
| | | | | | | |
Collapse
|
191
|
Igarashi H, Ohno K, Fujiwara-Igarashi A, Kanemoto H, Fukushima K, Goto-Koshino Y, Uchida K, Tsujimoto H. Functional analysis of pattern recognition receptors in miniature dachshunds with inflammatory colorectal polyps. J Vet Med Sci 2014; 77:439-47. [PMID: 25650150 PMCID: PMC4427745 DOI: 10.1292/jvms.14-0505] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Inflammatory colorectal polyps (ICRPs) frequently occur in miniature dachshunds (MDs) in
Japan. MDs with ICRPs develop multiple polyps with severe neutrophil infiltration that
respond to immunosuppressive therapy. Therefore, ICRPs are thought to constitute a novel,
breed-specific form of canine inflammatory bowel disease (IBD). Pattern recognition
receptors (PRRs) play a key role in the distinction of pathogens from commensal bacteria
and food antigens. Dysfunction resulting from genetic disorders of PRRs have been linked
to human and canine IBD. Therefore, we analyzed the reactivity of PRRs in MDs with ICRPs.
Twenty-six MDs with ICRPs and 16 control MDs were recruited. Peripheral blood-derived
monocytes were obtained from each dog and then stimulated with PRR ligands for 6 and 24
hr; subsequently, messenger RNA (mRNA) expression levels and protein secretion of IL-1β
were quantified using quantitative real-time PCR and ELISA, respectively. The levels of
IL-1β mRNA and protein secretion after stimulation with a nucleotide-binding
oligomerization domain 2 (NOD2) ligand were significantly greater in monocytes from
ICRP-affected MDs than in those from control MDs. In addition, IL-1β protein secretion
induced by toll-like receptor (TLR) 1/2, TLR2 and TLR2/6 stimulation was also
significantly greater in ICRP-affected MDs. These results suggest that reactivity against
NOD2, TLR1/2, TLR2 and TLR2/6 signals is enhanced in ICRP-affected MDs and may play a role
in the pathogenesis of ICRPs in MDs. Additional studies of the genetic background of these
PRRs should be performed.
Collapse
Affiliation(s)
- Hirotaka Igarashi
- Department of Veterinary Internal Medicine, Graduate School of Agricultural and Life Science, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | | | | | | | | | | | | | | |
Collapse
|
192
|
Lin CY, Lee CH, Chang YW, Wang HM, Chen CY, Chen YH. Pheophytin a inhibits inflammation via suppression of LPS-induced nitric oxide synthase-2, prostaglandin E2, and interleukin-1β of macrophages. Int J Mol Sci 2014; 15:22819-34. [PMID: 25501336 PMCID: PMC4284740 DOI: 10.3390/ijms151222819] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Revised: 11/26/2014] [Accepted: 11/27/2014] [Indexed: 12/20/2022] Open
Abstract
Inflammation is a serious health issue worldwide that induces many diseases such as sepsis. There has been a vast search for potentially effective drugs to decrease mortality from sepsis. Pheophytin a is a chlorophyll-related compound derived from green tea. We found that pre-treatment with pheophytin a suppressed lipopolysaccharide (LPS)-induced nitric oxide (NO), prostaglandin E2 (PGE2), and interleukin-1β in RAW 264.7 macrophages. NO synthase-2 (NOS2) and cyclooxygenase-2 (COX-2) expression levels were repressed by pre-treatment with pheophytin a at both the transcriptional and translational levels. Pheophytin a inhibited NOS2 promoter activity, but not its mRNA stability, through extracellular signal-regulated kinase (ERK1/2). This suppression was reversed by ERK1/2 inhibitor (U0126). Pheophytin a reduced signal transducers and activators of transcription 1 (STAT-1) activation, without an obvious influence on activator protein-1 (AP-1) and nuclear factor κB (NF-κB). These results suggest that pheophytin a functions by down-regulating the transcriptional levels of inflammatory mediators and blocking the ERK and STAT-1 pathways.
Collapse
Affiliation(s)
- Chun-Yu Lin
- Division of Infectious Diseases, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan.
| | - Chien-Hsing Lee
- Department of Nursing, Min-Hwei Junior College of Health Care Management, Tainan 736, Taiwan.
| | - Yu-Wei Chang
- School of Medicine, Graduate Institute of Medicine, Sepsis Research Center, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan.
| | - Hui-Min Wang
- Department of Fragrance and Cosmetic Science, Kaohsiung Medical University, Kaohsiung 807, Taiwan.
| | - Chung-Yi Chen
- School of Medical and Health Sciences, Fooyin University, Kaohsiung 831, Taiwan.
| | - Yen-Hsu Chen
- Division of Infectious Diseases, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan.
| |
Collapse
|
193
|
Overexpression of circadian clock protein cryptochrome (CRY) 1 alleviates sleep deprivation-induced vascular inflammation in a mouse model. Immunol Lett 2014; 163:76-83. [PMID: 25435215 DOI: 10.1016/j.imlet.2014.11.014] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2014] [Revised: 11/20/2014] [Accepted: 11/22/2014] [Indexed: 12/11/2022]
Abstract
Disturbance of the circadian clock by sleep deprivation has been proposed to be involved in the regulation of inflammation. However, the underlying mechanism of circadian oscillator components in regulating the pro-inflammatory process during sleep deprivation remains poorly understood. Using a sleep deprivation mouse model, we showed here that sleep deprivation increased the expression of pro-inflammatory cytokines expression and decreased the expression of cryptochrome 1 (CRY1) in vascular endothelial cells. Furthermore, the adhesion molecules including intercellular adhesion molecule-1, vascular cell adhesion molecule-1 and E-selectin were elevated in vascular endothelial cells and the monocytes binding to vascular endothelial cells were also increased by sleep deprivation. Interestingly, overexpression of CRY1 in a mouse model by adenovirus vector significantly inhibited the expression of inflammatory cytokines and adhesion molecules, and NF-κB signal pathway activation, as well as the binding of monocytes to vascular endothelial cells. Using a luciferase reporter assay, we found that CRY1 could repress the transcriptional activity of nuclear factor (NF)-κB in vitro. Subsequently, we demonstrated that overexpression of CRY1 inhibited the basal concentration of cyclic adenosine monophosphate (cAMP), leading to decreased protein kinase A activity, which resulted in decreased phosphorylation of p65. Taken together, these results suggested that the overexpression of CRY1 inhibited sleep deprivation-induced vascular inflammation that might be associated with NF-κB and cAMP/PKA pathways.
Collapse
|
194
|
Cao M, Wang Q, Lingel A, Zhang L. Nuclear factor κB represses the expression of latent membrane protein 1 in Epstein-Barr virus transformed cells. World J Virol 2014; 3:22-29. [PMID: 25396119 PMCID: PMC4229812 DOI: 10.5501/wjv.v3.i4.22] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Revised: 07/14/2014] [Accepted: 09/19/2014] [Indexed: 02/05/2023] Open
Abstract
AIM: To investigate the role of nuclear factor κB (NF-κB) in the regulation of Epstein-Barr virus (EBV) latent membrane protein 1 (LMP1) in EBV transformed cells.
METHODS: LMP1 expression was examined in EBV transformed human B lymphocytes with modulation of NF-κB activity.
RESULTS: EBV infection is associated with several human cancers. EBV LMP1 is required for efficient transformation of adult primary B cells in vitro, and is expressed in several pathogenic stages of EBV-associated cancers. Regulation of EBV LMP1 involves both viral and cellular factors. LMP1 activates NF-κB signaling pathway that is a part of the EBV transformation program. However, the relation between NF-κB and LMP1 expression is not well established yet. In this report, we found that blocking the NF-κB activity by Inhibitor of κB stimulated LMP1 expression, while the overexpression of NF-κB repressed LMP1 expression in EBV-transformed IB4 cells. In addition, LMP1 repressed its own promoter activities in reporter assays, and the repression was associated with the activation of NF-κB. Moreover, NF-κB alone is sufficient to repress LMP1 promoter activities.
CONCLUSION: Our data suggest LMP1 may repress its own expression through NF-κB in EBV transformed cells and shed a light on LMP1 regulation during EBV transformation.
Collapse
|
195
|
Sha F, Wu S, Zhang H, Guo X. miR-183 potentially inhibits NF-κB1 expression by directly targeting its 3'-untranslated region. Acta Biochim Biophys Sin (Shanghai) 2014; 46:991-6. [PMID: 25274328 DOI: 10.1093/abbs/gmu088] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Nuclear factor-κB (NF-κB) is an important transcription factor. While the NF-κB signaling pathway is modulated by many microRNAs (miRNAs), very few have been reported to target NF-κB1 gene directly. In this study, we used multiple miRNA target prediction programs to predict miRNAs with putative NF-κB1 3'-untranslated region (UTR) binding sites. miR-183 was strongly implicated and experimentally validated by reporter assays. The results showed a reduced expression of the NF-κB1 3'UTR containing luciferase vector by ∼30%, which was comparable to the reduction by miR-9 (the only known miRNA targeting the NF-κB1 3'UTR). Mutagenesis of the miR-183 seed region binding sequence in the NF-κB1 3'UTR abolished the inhibitory effect of miR-183, as noted by the NF-κB1 3'UTR-containing reporter. Moreover, similar to miR-9, miR-183 could down-regulate the expression of the reporter driven by NF-κB promoter to some degree, suggesting that miR-183 might negatively regulate the endogenous NF-κB1. Overall, our data provide computational and experimental evidence that NF-κB1 is a potential target of miR-183.
Collapse
Affiliation(s)
- Fushen Sha
- Zhongshan School of Medicine, Institute of Human Virology, Sun Yat-Sen University, Guangzhou 510080, China Key Laboratory of Tropical Disease Control, Sun Yat-Sen University, Ministry of Education, Guangzhou 510080, China
| | - Shuangxing Wu
- Zhongshan School of Medicine, Institute of Human Virology, Sun Yat-Sen University, Guangzhou 510080, China Key Laboratory of Tropical Disease Control, Sun Yat-Sen University, Ministry of Education, Guangzhou 510080, China
| | - Hui Zhang
- Zhongshan School of Medicine, Institute of Human Virology, Sun Yat-Sen University, Guangzhou 510080, China Key Laboratory of Tropical Disease Control, Sun Yat-Sen University, Ministry of Education, Guangzhou 510080, China
| | - Xuemin Guo
- Zhongshan School of Medicine, Institute of Human Virology, Sun Yat-Sen University, Guangzhou 510080, China Key Laboratory of Tropical Disease Control, Sun Yat-Sen University, Ministry of Education, Guangzhou 510080, China Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China
| |
Collapse
|
196
|
Song W, Yang Z, He B. Bestrophin 3 ameliorates TNFα-induced inflammation by inhibiting NF-κB activation in endothelial cells. PLoS One 2014; 9:e111093. [PMID: 25329324 PMCID: PMC4203846 DOI: 10.1371/journal.pone.0111093] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Accepted: 09/22/2014] [Indexed: 01/20/2023] Open
Abstract
Increasing evidences have suggested vascular endothelial inflammatory processes are the initiator of atherosclerosis. Bestrophin 3 (Best-3) is involved in the regulation of cell proliferation, apoptosis and differentiation of a variety of physiological functions, but its function in cardiovascular system remains unclear. In this study, we investigated the effect of Best-3 on endothelial inflammation. We first demonstrated that Best-3 is expressed in endothelial cells and decreased after tumor necrosis factor-α (TNFα) challenge. Overexpression of Best-3 significantly attenuated TNFα-induced expression of adhesion molecules and chemokines, and subsequently inhibited the adhesion of monocytes to human umbilical vein endothelial cells (HUVECs). Conversely, knockdown of Best-3 with siRNA resulted in an enhancement on TNFα-induced expression of adhesion molecules and chemokines and adhesion of monocytes to HUVECs. Furthermore, overexpression of Best-3 with adenovirus dramatically ameliorated inflammatory response in TNFα-injected mice. Mechanistically, we found up-regulation of Best-3 inhibited TNFα-induced IKKβ and IκBα phosphorylation, IκBα degradation and NF-κB translocation. Our results demonstrated that Best-3 is an endogenous inhibitor of NF-κB signaling pathway in endothelial cells, suggesting that forced Best-3 expression may be a novel approach for the treatment of vascular inflammatory diseases.
Collapse
Affiliation(s)
- Wei Song
- Department of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Zhen Yang
- Department of Hypertension and Vascular Disease, the First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Ben He
- Department of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
- * E-mail:
| |
Collapse
|
197
|
Lager S, Aye ILMH, Gaccioli F, Ramirez VI, Jansson T, Powell TL. Labor inhibits placental mechanistic target of rapamycin complex 1 signaling. Placenta 2014; 35:1007-12. [PMID: 25454472 DOI: 10.1016/j.placenta.2014.10.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Revised: 10/08/2014] [Accepted: 10/10/2014] [Indexed: 11/24/2022]
Abstract
INTRODUCTION Labor induces a myriad of changes in placental gene expression. These changes may represent a physiological adaptation inhibiting placental cellular processes associated with a high demand for oxygen and energy (e.g., protein synthesis and active transport) thereby promoting oxygen and glucose transfer to the fetus. We hypothesized that mechanistic target of rapamycin complex 1 (mTORC1) signaling, a positive regulator of trophoblast protein synthesis and amino acid transport, is inhibited by labor. METHODS Placental tissue was collected from healthy, term pregnancies (n = 15 no-labor; n = 12 labor). Activation of Caspase-1, IRS1/Akt, STAT, mTOR, and inflammatory signaling pathways was determined by Western blot. NFĸB p65 and PPARγ DNA binding activity was measured in isolated nuclei. RESULTS Labor increased Caspase-1 activation and mTOR complex 2 signaling, as measured by phosphorylation of Akt (S473). However, mTORC1 signaling was inhibited in response to labor as evidenced by decreased phosphorylation of mTOR (S2448) and 4EBP1 (T37/46 and T70). Labor also decreased NFĸB and PPARγ DNA binding activity, while having no effect on IRS1 or STAT signaling pathway. DISCUSSION AND CONCLUSION Several placental signaling pathways are affected by labor, which has implications for experimental design in studies of placental signaling. Inhibition of placental mTORC1 signaling in response to labor may serve to down-regulate protein synthesis and amino acid transport, processes that account for a large share of placental oxygen and glucose consumption. We speculate that this response preserves glucose and oxygen for transfer to the fetus during the stressful events of labor.
Collapse
Affiliation(s)
- S Lager
- Center for Pregnancy and Newborn Research, Department of Obstetrics and Gynecology, University of Texas Health Science Center, San Antonio, TX 78229, USA.
| | - I L M H Aye
- Center for Pregnancy and Newborn Research, Department of Obstetrics and Gynecology, University of Texas Health Science Center, San Antonio, TX 78229, USA
| | - F Gaccioli
- Center for Pregnancy and Newborn Research, Department of Obstetrics and Gynecology, University of Texas Health Science Center, San Antonio, TX 78229, USA
| | - V I Ramirez
- Center for Pregnancy and Newborn Research, Department of Obstetrics and Gynecology, University of Texas Health Science Center, San Antonio, TX 78229, USA
| | - T Jansson
- Center for Pregnancy and Newborn Research, Department of Obstetrics and Gynecology, University of Texas Health Science Center, San Antonio, TX 78229, USA
| | - T L Powell
- Center for Pregnancy and Newborn Research, Department of Obstetrics and Gynecology, University of Texas Health Science Center, San Antonio, TX 78229, USA
| |
Collapse
|
198
|
Lu X, Yarbrough WG. Negative regulation of RelA phosphorylation: emerging players and their roles in cancer. Cytokine Growth Factor Rev 2014; 26:7-13. [PMID: 25438737 DOI: 10.1016/j.cytogfr.2014.09.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2014] [Accepted: 09/03/2014] [Indexed: 01/25/2023]
Abstract
NF-κB signaling contributes to human disease processes, notably inflammatory diseases and cancer. Many advances have been made in understanding mechanisms responsible for abnormal NF-κB activation with RelA post-translational modification, particularly phosphorylation, proven to be critical for RelA function. While the majority of studies have focused on identifying kinases responsible for NF-κB phosphorylation and pathway activation, recently progress has also been made in understanding the negative regulators important for restraining RelA activity. Here we summarize negative regulators of RelA phosphorylation, their targeting sites in RelA and biological functions through negative regulation of RelA activation. Finally, we emphasize the tumor suppressor-like roles that these negative regulators can assume in human cancers.
Collapse
Affiliation(s)
- Xinyuan Lu
- Department of Cancer Biology, Vanderbilt University, Nashville, TN, USA; Department of Medicine, University of California at San Francisco, San Francisco, CA, USA
| | - Wendell G Yarbrough
- Division of Otolaryngology, Department of Surgery, Yale University, New Haven, CT, USA; Department of Pathology, Yale University, New Haven, CT, USA; Yale Cancer Center, New Haven, CT, USA.
| |
Collapse
|
199
|
Comparison of the molecular topologies of stress-activated transcription factors HSF1, AP-1, NRF2, and NF-κB in their induction kinetics of HMOX1. Biosystems 2014; 124:75-85. [DOI: 10.1016/j.biosystems.2014.09.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2014] [Revised: 08/30/2014] [Accepted: 09/04/2014] [Indexed: 12/13/2022]
|
200
|
Banerjee A, Mifsud NA, Bird R, Forsyth C, Szer J, Tam C, Kellner S, Grigg A, Motum P, Bentley M, Opat S, Grigoriadis G. The oral iron chelator deferasirox inhibits NF-κB mediated gene expression without impacting on proximal activation: implications for myelodysplasia and aplastic anaemia. Br J Haematol 2014; 168:576-82. [PMID: 25271366 DOI: 10.1111/bjh.13151] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Accepted: 08/08/2014] [Indexed: 12/22/2022]
Abstract
The myelodysplastic syndromes (MDS) are a group of disorders characterized by ineffective haematopoiesis, bone marrow dysplasia and cytopenias. Failure of red cell production often results in transfusion dependency with subsequent iron loading requiring iron chelation in lower risk patients. Consistent with previous reports, we have observed haematopoietic improvement in a cohort of patients treated with the oral iron chelator deferasirox (DFX). It has been postulated that MDS patients have a pro-inflammatory bone marrow environment with increased numbers of activated T cells producing elevated levels of tumour necrosis factor (TNF), which is detrimental to normal haematopoiesis. We demonstrate that DFX inhibits nuclear factor (NF)-κB dependent transcription without affecting its proximal activation, resulting in reduced TNF production from T cells stimulated in vitro. These results suggest that the haematopoietic improvement observed in DFX-treated patients may reflect an anti-inflammatory effect, mediated through inhibition of the transcription factor NF-κB and support the therapeutic targeting of this pathway, which is aberrantly activated in a large proportion of haematological malignancies.
Collapse
Affiliation(s)
- Ashish Banerjee
- Centre for Cancer Research, MIMR-PHI Institute of Medical Research, Clayton, Vic., Australia; Centre for Inflammatory Diseases, Monash University, Clayton, Vic., Australia
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|