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Stolle M, Schulze J, Roemer A, Lenarz T, Durisin M, Warnecke A. Human Plasma Rich in Growth Factors Improves Survival and Neurite Outgrowth of Spiral Ganglion Neurons In Vitro. Tissue Eng Part A 2017; 24:493-501. [PMID: 28610547 DOI: 10.1089/ten.tea.2017.0120] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Platelet-rich and platelet-poor plasma (PRP and PPP) are autologous preparations from peripheral blood and contain several growth factors and cytokines involved in tissue repair. Although their neuroprotective and neuroregenerative properties have been already described, little is known about their effects in the inner ear. We, therefore, examined the effects of PRP and PPP on spiral ganglion neurons (SGN) in vitro. RESULTS For all experiments, spiral ganglia were isolated from neonatal rats and were cultured in serum-free medium. PRP from human venous blood was added to dissociated SGN. Treatment with PRP (1:10, 1:50) significantly increased the neuronal survival and the neuronal outgrowth of SGN. This effect was completely reversed by the addition of Bay 11 (nuclear factor kappa B-inhibitor) and SB203580 (p38 mitogen-activated protein kinase [p38MAPK]-inhibitor). Furthermore, PPP was used as a cell-free matrix for the attachment of spiral ganglion explants. Coating with activated PPP improved the adhesion and neurite outgrowth of spiral ganglia explants. Therefore, activated PPP is a promising alternative for poly d/l-ornithine and laminin coating due to the gelatinous composition through the activation of PPP with calcium gluconate. PRP promotes neuroprotective and neuroregenerative effects on SGN when administered in adequate concentrations. These beneficial effects seem to be depending on NF-κB and the p38MAPK pathways. CONCLUSION Preparations from autologous whole blood (PRP and PPP, respectively) present an interesting alternative for pharmacological intervention to the inner ear since they contain a balanced and natural composition of trophic factors.
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Affiliation(s)
- Michael Stolle
- 1 Department of Otolaryngology, Hannover Medical School , Hannover, Germany
| | - Jennifer Schulze
- 1 Department of Otolaryngology, Hannover Medical School , Hannover, Germany .,2 Cluster of Excellence of the German Research Foundation (DFG; "Deutsche Forschungsgemeinschaft") "Hearing4all", Hannover, Germany
| | - Ariane Roemer
- 1 Department of Otolaryngology, Hannover Medical School , Hannover, Germany
| | - Thomas Lenarz
- 1 Department of Otolaryngology, Hannover Medical School , Hannover, Germany .,2 Cluster of Excellence of the German Research Foundation (DFG; "Deutsche Forschungsgemeinschaft") "Hearing4all", Hannover, Germany
| | - Martin Durisin
- 1 Department of Otolaryngology, Hannover Medical School , Hannover, Germany
| | - Athanasia Warnecke
- 1 Department of Otolaryngology, Hannover Medical School , Hannover, Germany .,2 Cluster of Excellence of the German Research Foundation (DFG; "Deutsche Forschungsgemeinschaft") "Hearing4all", Hannover, Germany
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102
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Abdallah BM. Marrow adipocytes inhibit the differentiation of mesenchymal stem cells into osteoblasts via suppressing BMP-signaling. J Biomed Sci 2017; 24:11. [PMID: 28173811 PMCID: PMC5296965 DOI: 10.1186/s12929-017-0321-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 01/31/2017] [Indexed: 01/24/2023] Open
Abstract
Background Reduced bone formation is associated with increased bone marrow fat in many bone-loss related diseases including aging, post-menopause, and anorexia nervosa. Several lines of evidence suggested the regulation of osteogenesis and adipogenesis of the bone marrow-derived mesenchymal (skeletal) stem cells (BMSCs) by paracrine mediators. This study aimed to investigate the impact of adipocytes-secreted factors on the cell proliferation and osteoblast differentiation of BMSCs. Methods Serum free conditioned medium (CM-Adipo) was collected from stromal ST2 cells-derived adipocytes. Cell viability, quantitative alkaline phosphatase (ALP) activity assay, Alizarin red staining for matrix mineralization and osteogenic gene array expression were performed to determine the effect of CM-Adipo on cell proliferation and osteoblast differentiation of primary murine BMSCs (mBMSCs). Regulation of BMPs and NF-κB signaling pathways by CM-Adipo were detected by Western blot analysis and gene reporter assay. Results CM-Adipo showed no effect on cell viability/proliferation of primary mBMSCs as compared to CM-control. On the other hand, CM-Adipo significantly inhibited the commitment of mBMSCs into osteoblastic cell lineage in dose-dependent manner. CM-Adipo was found to dramatically inhibit the BMP2-induced osteoblast differentiation and to activate the inflammatory NF-κB signaling in mBMSCs. Interestingly, treatment of mBMSCs with the selective inhibitor of NF-κB pathway, BAY11-770682, showed to retrieve the inhibitory effect of CM-Adipo on BMP2-induced osteoblast differentiation in mBMSCs. Conclusions Our data demonstrated that the marrow adipocytes exert paracrine inhibitory effect on the osteoblast differentiation of mBMSCs by blocking BMPs signaling in a mechanism mediated by adipokines-induced NF-κB pathway activation. Electronic supplementary material The online version of this article (doi:10.1186/s12929-017-0321-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Basem M Abdallah
- Molecular Endocrinology Laboratory (KMEB), Department of Endocrinology, Odense University Hospital and University of Southern Denmark, Odense, Denmark. .,Department of Biological Sciences, College of Science, King Faisal University, Hofuf, Saudi Arabia. .,Faculty of Science, Helwan University, Cairo, Egypt.
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103
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BAY 11-7082 inhibits the NF-κB and NLRP3 inflammasome pathways and protects against IMQ-induced psoriasis. Clin Sci (Lond) 2017; 131:487-498. [PMID: 28096316 DOI: 10.1042/cs20160645] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2016] [Revised: 01/16/2017] [Accepted: 01/17/2017] [Indexed: 11/17/2022]
Abstract
BAY 11-7082 antagonizes I-κB kinase-β preventing nuclear translocation of nuclear factor-κB (NF-κB); it also inhibits NOD-like receptor family, pyrin domain containing 3 (NLRP3) inflammasome activation. NF-κB is involved in psoriasis, whereas the role of NLRP3 is controversial. We investigated BAY 11-7082 effects in an experimental model of psoriasis-like dermatitis. Psoriasis-like lesions were induced by a topical application of imiquimod (IMQ) cream (62.5 mg/day) on the shaved back skin of C57BL/6 and NLRP3 knockout (KO) mice for 7 consecutive days. Sham psoriasis animals were challenged with Vaseline cream. Sham and IMQ animals were randomized to receive BAY 11-7082 (20 mg/kg/i.p.) or its vehicle (100 μl/i.p of 0.9% NaCl). Skin of IMQ animals developed erythema, scales, thickening and epidermal acanthosis. IMQ skin samples showed increased expression of pNF-κB and NLRP3 activation. BAY 11-7082 blunted epidermal thickness, acanthosis and inflammatory infiltrate. BAY 11-7082 reduced pNF-κB, NLRP3, tumour necrosis factor-α (TNF-α), interleukin (IL)-6 and IL-1β expression, blunted the phosphorylation of signal transducer and activators of transcription 3 (STAT3) and decreased IL-23 levels. In addition, BAY 11-7082 reawakened the apoptotic machinery. NLRP3 KO animals showed a reduced total histological score but persistent mild acanthosis, dermal thickness and expression of pNF-κB and pSTAT3, following IMQ application. Our data suggest that BAY 11-7082 might represent an interesting approach for the management of psoriasis-like dermatitis depending on the dual inhibition of NF-κB and NLRP3.
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104
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Felley LE, Sharma A, Theisen E, Romero-Masters JC, Sauer JD, Gumperz JE. Human Invariant NKT Cells Induce IL-1β Secretion by Peripheral Blood Monocytes via a P2X7-Independent Pathway. THE JOURNAL OF IMMUNOLOGY 2016; 197:2455-64. [PMID: 27534556 DOI: 10.4049/jimmunol.1600790] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Accepted: 07/19/2016] [Indexed: 01/02/2023]
Abstract
The cytokine IL-1β plays a central role in inflammatory responses that are initiated by microbial challenges, as well as in those that are due to endogenous processes (often called sterile inflammation). IL-1β secretion that occurs independently of microbial stimulation is typically associated with the presence of endogenous alarmins, such as extracellular ATP (an indicator of cytopathic damage). In this study, we show that IL-2-activated human invariant NKT (iNKT) cells stimulate the secretion of IL-1β protein by human peripheral blood monocytes in a manner that requires neither the presence of microbial compounds nor signaling through the extracellular ATP receptor P2X7 Monocyte IL-1β production was specifically induced by iNKT cells, because similarly activated polyclonal autologous T cells did not have this effect. Secretion of IL-1β protein occurred rapidly (within 3-4 h) and required cell contact between the iNKT cells and monocytes. Similar to IL-1β production induced by TLR stimulation, the iNKT-induced pathway appeared to entail a two-step process involving NF-κB signaling and IL1B gene transcription, as well as assembly of the NLRP3 inflammasome and activation of caspase-1. However, in contrast to the classical inflammasome-mediated pathway of IL-1β production, activation of monocytes via P2X7 was dispensable for iNKT-induced IL-1β secretion, and potassium efflux was not required. Moreover, the iNKT-induced effect involved caspase-8 activity, yet it induced little monocyte death. These results suggest that IL-2-activated human iNKT cells induce monocytes to produce IL-1β through a distinctive pathway that does not require the presence of microbial danger signals or alarmins associated with cytopathic damage.
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Affiliation(s)
- Laura E Felley
- Department of Medical Microbiology and Immunology, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706; and
| | - Akshat Sharma
- Department of Medical Microbiology and Immunology, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706; and
| | - Erin Theisen
- Department of Medical Microbiology and Immunology, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706; and
| | - James C Romero-Masters
- Department of Oncology, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706
| | - John-Demian Sauer
- Department of Medical Microbiology and Immunology, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706; and
| | - Jenny E Gumperz
- Department of Medical Microbiology and Immunology, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706; and
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105
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Ghashghaeinia M, Giustarini D, Koralkova P, Köberle M, Alzoubi K, Bissinger R, Hosseinzadeh Z, Dreischer P, Bernhardt I, Lang F, Toulany M, Wieder T, Mojzikova R, Rossi R, Mrowietz U. Pharmacological targeting of glucose-6-phosphate dehydrogenase in human erythrocytes by Bay 11-7082, parthenolide and dimethyl fumarate. Sci Rep 2016; 6:28754. [PMID: 27353740 PMCID: PMC4926109 DOI: 10.1038/srep28754] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 06/08/2016] [Indexed: 12/19/2022] Open
Abstract
In mature erythrocytes, glucose-6-phosphate dehydrogenase (G6PDH) and 6-phosphogluconate dehydrogenase (6PGDH) yield NADPH, a crucial cofactor of the enzyme glutathione reductase (GR) converting glutathione disulfide (GSSG) into its reduced state (GSH). GSH is essential for detoxification processes in and survival of erythrocytes. We explored whether the anti-inflammatory compounds Bay 11–7082, parthenolide and dimethyl fumarate (DMF) were able to completely deplete a common target (GSH), and to impair the function of upstream enzymes of GSH recycling and replenishment. Treatment of erythrocytes with Bay 11–7082, parthenolide or DMF led to concentration-dependent eryptosis resulting from complete depletion of GSH. GSH depletion was due to strong inhibition of G6PDH activity. Bay 11–7082 and DMF, but not parthenolide, were able to inhibit the GR activity. This approach “Inhibitors, Detection of their common target that is completely depleted or inactivated when pharmacologically relevant concentrations of each single inhibitor are applied, Subsequent functional analysis of upstream enzymes for this target” (IDS), can be applied to a broad range of inhibitors and cell types according to the selected target. The specific G6PDH inhibitory effect of these compounds may be exploited for the treatment of human diseases with high NADPH and GSH consumption rates, including malaria, trypanosomiasis, cancer or obesity.
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Affiliation(s)
- Mehrdad Ghashghaeinia
- Psoriasis-Center, Department of Dermatology, University Medical Center Schleswig-Holstein, Campus Kiel, Schittenhelmstr. 7, Kiel, 24105, Germany
| | - Daniela Giustarini
- Department of Life Sciences, Laboratory of Pharmacology and Toxicology, University of Siena, Via A Moro 2, 53100, Siena, Italy
| | - Pavla Koralkova
- Department of Biology, Faculty of Medicine and Dentistry Palacky University, Hnevotinska 3, 77515 Olomouc, Czech Republic
| | - Martin Köberle
- Department of Dermatology and Allergy, Biedersteinerstr. 29, Technische Universität München, 80802 München, Germany
| | - Kousi Alzoubi
- Department of Cardiology, Vascular Medicine and Physiology, University of Tübingen, Gmelinstr. 5, 72076, Tübingen, Germany
| | - Rosi Bissinger
- Department of Cardiology, Vascular Medicine and Physiology, University of Tübingen, Gmelinstr. 5, 72076, Tübingen, Germany
| | - Zohreh Hosseinzadeh
- Centre for Ophthalmology, Institute for Ophthalmic Research, Eberhard-Karls-University Tübingen, Frondsbergstr. 23, 72076 Tübingen, Germany
| | - Peter Dreischer
- Institute of Physiology II, Keplerstr. 15, Eberhard Karls University of Tübingen, 72074 Tübingen, Germany
| | - Ingolf Bernhardt
- Laboratory of Biophysics, Saarland University, Campus A2.4, 66123 Saarbrücken, Germany
| | - Florian Lang
- Department of Cardiology, Vascular Medicine and Physiology, University of Tübingen, Gmelinstr. 5, 72076, Tübingen, Germany
| | - Mahmoud Toulany
- Division of Radiobiology and Molecular Environmental Research, Department of Radiation Oncology, Roentgenweg 11, Eberhard Karls University Tübingen, 72076 Tübingen, Germany
| | - Thomas Wieder
- Department of Dermatology; Eberhard Karls University, Tübingen, Germany
| | - Renata Mojzikova
- Department of Biology, Faculty of Medicine and Dentistry Palacky University, Hnevotinska 3, 77515 Olomouc, Czech Republic
| | - Ranieri Rossi
- Department of Life Sciences, Laboratory of Pharmacology and Toxicology, University of Siena, Via A Moro 2, 53100, Siena, Italy
| | - Ulrich Mrowietz
- Psoriasis-Center, Department of Dermatology, University Medical Center Schleswig-Holstein, Campus Kiel, Schittenhelmstr. 7, Kiel, 24105, Germany
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106
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Dáňová K, Klapetková A, Kayserová J, Šedivá A, Špíšek R, Jelínková LP. NF-κB, p38 MAPK, ERK1/2, mTOR, STAT3 and increased glycolysis regulate stability of paricalcitol/dexamethasone-generated tolerogenic dendritic cells in the inflammatory environment. Oncotarget 2016; 6:14123-38. [PMID: 26053099 PMCID: PMC4546455 DOI: 10.18632/oncotarget.4234] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Accepted: 05/12/2015] [Indexed: 12/12/2022] Open
Abstract
Tolerogenic dendritic cells (tDCs) may offer an intervention therapy in autoimmune diseases or transplantation. Stable immaturity and tolerogenic function of tDCs after encountering inflammatory environment are prerequisite for positive outcome of immunotherapy. However, the signaling pathways regulating their stable tolerogenic properties are largely unknown. In this study, we demonstrated that human monocyte-derived tDCs established by using paricalcitol (analogue of vitamin D2), dexamethasone and monophosphoryl lipid A exposed for 24h to LPS, cytokine cocktail, polyI:C or CD40L preserved reduced expression of co-stimulatory molecules, increased levels of inhibitory molecules ILT-3, PDL-1 and TIM-3, increased TLR-2, increased secretion of IL-10 and TGF-β, reduced IL-12 and TNF-α secretion and reduced T cell stimulatory capacity. tDCs further induced IL-10-producing T regulatory cells that suppressed the proliferation of responder T cells. In the inflammatory environment, tDCs maintained up-regulated indoleamine 2, 3 dioxygenase but abrogated IκB-α phosphorylation and reduced transcriptional activity of p65/RelA, RelB and c-Rel NF-κB subunits except p50. Mechanistically, p38 MAPK, ERK1/2, mTOR, STAT3 and mTOR-dependent glycolysis regulated expression of ILT-3, PDL-1 and CD86, secretion of IL-10 and T cell stimulatory capacity of tDCs in the inflammatory environment. Stability of tDCs in the inflammatory environment is thus regulated by multiple signaling pathways.
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Affiliation(s)
- Klára Dáňová
- Sotio a.s., Prague, Czech Republic.,Department of Immunology, Charles University, 2nd Medical School, Prague, Czech Republic
| | - Anna Klapetková
- Sotio a.s., Prague, Czech Republic.,Department of Immunology, Charles University, 2nd Medical School, Prague, Czech Republic
| | - Jana Kayserová
- Department of Immunology, Charles University, 2nd Medical School, Prague, Czech Republic
| | - Anna Šedivá
- Department of Immunology, Charles University, 2nd Medical School, Prague, Czech Republic
| | - Radek Špíšek
- Sotio a.s., Prague, Czech Republic.,Department of Immunology, Charles University, 2nd Medical School, Prague, Czech Republic
| | - Lenka Palová Jelínková
- Sotio a.s., Prague, Czech Republic.,Department of Immunology, Charles University, 2nd Medical School, Prague, Czech Republic
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107
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Chiazza F, Couturier-Maillard A, Benetti E, Mastrocola R, Nigro D, Cutrin JC, Serpe L, Aragno M, Fantozzi R, Ryffel B, Thiemermann C, Collino M. Targeting the NLRP3 Inflammasome to Reduce Diet-Induced Metabolic Abnormalities in Mice. Mol Med 2016; 21:1025-1037. [PMID: 26623925 DOI: 10.2119/molmed.2015.00104] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Accepted: 11/23/2015] [Indexed: 01/17/2023] Open
Abstract
Although the molecular links underlying the causative relationship between chronic low-grade inflammation and insulin resistance are not completely understood, compelling evidence suggests a pivotal role of the nucleotide-binding oligomerization domain (NOD)-like receptor pyrin domain containing 3 (NLRP3) inflammasome. Here we tested the hypothesis that either a selective pharmacological inhibition or a genetic downregulation of the NLRP3 inflammasome results in reduction of the diet-induced metabolic alterations. Male C57/BL6 wild-type mice and NLRP3-/- littermates were fed control diet or high-fat, high-fructose diet (HD). A subgroup of HD-fed wild-type mice was treated with the NLRP3 inflammasome inhibitor BAY 11-7082 (3 mg/kg intraperitoneally [IP]). HD feeding increased plasma and hepatic lipids and impaired glucose homeostasis and renal function. Renal and hepatic injury was associated with robust increases in profibrogenic markers, while only minimal fibrosis was recorded. None of these metabolic abnormalities were detected in HD-fed NLRP3-/- mice, and they were dramatically reduced in HD-mice treated with the NLRP3 inflammasome inhibitor. BAY 11-7082 also attenuated the diet-induced increase in NLRP3 inflammasome expression, resulting in inhibition of caspase-1 activation and interleukin (IL)-1β and IL-18 production (in liver and kidney). Interestingly, BAY 11-7082, but not gene silencing, inhibited nuclear factor (NF)-κB nuclear translocation. Overall, these results demonstrate that the selective pharmacological modulation of the NLRP3 inflammasome attenuates the metabolic abnormalities and the related organ injury/dysfunction caused by chronic exposure to HD, with effects similar to those obtained by NLRP3 gene silencing.
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Affiliation(s)
- Fausto Chiazza
- Dipartimento di Scienza e Tecnologia del Farmaco, Università di Torino, Turin, Italy
| | - Aurélie Couturier-Maillard
- CNRS, UMR7355 INEM, Immunologie et Neurogénétique Expérimentales et Moléculaires, University of Orléans, Orléans, France
| | - Elisa Benetti
- Dipartimento di Scienza e Tecnologia del Farmaco, Università di Torino, Turin, Italy
| | - Raffaella Mastrocola
- Dipartimento di Scienze Cliniche e Biologiche, Università di Torino, Turin, Italy
| | - Debora Nigro
- Dipartimento di Scienze Cliniche e Biologiche, Università di Torino, Turin, Italy
| | - Juan C Cutrin
- Dipartimento di Biotecnologie Molecolari e Scienze per la Salute, Università di Torino, Turin, Italy.,ININCA-CONICET, Buenos Aires, Argentina
| | - Loredana Serpe
- Dipartimento di Scienza e Tecnologia del Farmaco, Universià di Torino, Turin, Italy
| | - Manuela Aragno
- Dipartimento di Scienze Cliniche e Biologiche, Università di Torino, Turin, Italy
| | - Roberto Fantozzi
- Dipartimento di Scienza e Tecnologia del Farmaco, Università di Torino, Turin, Italy
| | - Bernard Ryffel
- CNRS, UMR7355 INEM, Immunologie et Neurogénétique Expérimentales et Moléculaires, University of Orléans, Orléans, France
| | - Christoph Thiemermann
- Queen Mary University of London, Centre for Translational Medicine and Therapeutics, William Harvey Research Institute, Barts, and the London School of Medicine and Dentistry, London, United Kingdom
| | - Massimo Collino
- Dipartimento di Scienza e Tecnologia del Farmaco, Università di Torino, Turin, Italy
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108
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Van Avondt K, van der Linden M, Naccache PH, Egan DA, Meyaard L. Signal Inhibitory Receptor on Leukocytes-1 Limits the Formation of Neutrophil Extracellular Traps, but Preserves Intracellular Bacterial Killing. THE JOURNAL OF IMMUNOLOGY 2016; 196:3686-94. [DOI: 10.4049/jimmunol.1501650] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 03/03/2016] [Indexed: 11/19/2022]
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109
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Castiñeiras-Landeira MI, Rodiño-Janeiro BK, Paradela-Dobarro B, Batista-Oliveira AL, Raposeiras-Roubín S, González-Peteiro M, González-Juanatey JR, Álvarez E. Change of concept about the regulation of angiotensin II-induced monocyte chemoattractant protein-1 production in human endothelial cells. Vascul Pharmacol 2015; 80:20-34. [PMID: 26746853 DOI: 10.1016/j.vph.2015.12.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Revised: 12/11/2015] [Accepted: 12/12/2015] [Indexed: 10/22/2022]
Abstract
AIMS Some intriguing clinical observations about the anti-inflammatory effects of angiotensin type 1 (AT1) receptor blockers and angiotensin converting enzyme inhibitors in cardiovascular patients brought us to study the signalling pathways which lead to angiotensin II (ANG)-induced monocyte chemoattractant protein-1 (MCP-1) production in human endothelial cells. METHODS MCP-1 production in human umbilical vein endothelial cells (HUVECs) under treatments with ANG, AT1 and angiotensin type 2 (AT2) receptor blockers and pravastatin was measured by ELISA. The expression of AT1 and AT2 receptors and NADPH oxidase catalytic subunits (NOX 1-5) was analysed at mRNA and protein levels. Nuclear factor-kappa B (NF-κB) activation was studied by p65 subunit translocation to the cellular nucleus. Cell viability was tested by the MTT method. Nox4 subcellular distribution was analysed by subcellular protein fractionation and by immunoprecipitation followed by matrix-assisted laser desorption/ionization mass spectrometry analysis. RESULTS ANG-induced MCP-1 production was mediated by AT2 receptor, but not AT1 receptor in HUVECs in culture, which in turn activated NF-κB, promoting p65 subunit translocation to the nucleus. Reactive oxygen species produced by NADPH oxidase participated in this activation, mainly by the Nox4 subunit, ubiquitously expressed in all the compartments of HUVECs. Pravastatin inhibited ANG-induced MCP-1 production. CONCLUSIONS Our results support that ANG-induced MCP-1 production in HUVECs is mediated by AT2 instead AT1 receptor activation, which in turn activates NF-κB involving reactive oxygen species produced by the NADPH oxidase complex. Statins can also block ANG-induced MCP-1 production, probably by their inhibitory effects on NADPH oxidase activity.
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Affiliation(s)
- M I Castiñeiras-Landeira
- Servicio de Cardiología, Complejo Hospitalario Universitario de Santiago de Compostela and Instituto de Investigación Sanitaria de Santiago (IDIS), Santiago de Compostela 15706, Spain
| | - B K Rodiño-Janeiro
- Servicio de Cardiología, Complejo Hospitalario Universitario de Santiago de Compostela and Instituto de Investigación Sanitaria de Santiago (IDIS), Santiago de Compostela 15706, Spain
| | - B Paradela-Dobarro
- Servicio de Cardiología, Complejo Hospitalario Universitario de Santiago de Compostela and Instituto de Investigación Sanitaria de Santiago (IDIS), Santiago de Compostela 15706, Spain
| | - A L Batista-Oliveira
- Servicio de Cardiología, Complejo Hospitalario Universitario de Santiago de Compostela and Instituto de Investigación Sanitaria de Santiago (IDIS), Santiago de Compostela 15706, Spain
| | - S Raposeiras-Roubín
- Servicio de Cardiología, Complejo Hospitalario Universitario de Santiago de Compostela and Instituto de Investigación Sanitaria de Santiago (IDIS), Santiago de Compostela 15706, Spain
| | - M González-Peteiro
- Departamento de Enfermería, Universidad de Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - J R González-Juanatey
- Servicio de Cardiología, Complejo Hospitalario Universitario de Santiago de Compostela and Instituto de Investigación Sanitaria de Santiago (IDIS), Santiago de Compostela 15706, Spain; Departamento de Medicina, Universidad de Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - E Álvarez
- Servicio de Cardiología, Complejo Hospitalario Universitario de Santiago de Compostela and Instituto de Investigación Sanitaria de Santiago (IDIS), Santiago de Compostela 15706, Spain.
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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.
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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
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111
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Sharma V, Jordan JJ, Ciribilli Y, Resnick MA, Bisio A, Inga A. Quantitative Analysis of NF-κB Transactivation Specificity Using a Yeast-Based Functional Assay. PLoS One 2015; 10:e0130170. [PMID: 26147604 PMCID: PMC4493129 DOI: 10.1371/journal.pone.0130170] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2014] [Accepted: 05/18/2015] [Indexed: 11/18/2022] Open
Abstract
The NF-κB transcription factor family plays a central role in innate immunity and inflammation processes and is frequently dysregulated in cancer. We developed an NF-κB functional assay in yeast to investigate the following issues: transactivation specificity of NF-κB proteins acting as homodimers or heterodimers; correlation between transactivation capacity and in vitro DNA binding measurements; impact of co-expressed interacting proteins or of small molecule inhibitors on NF-κB-dependent transactivation. Full-length p65 and p50 cDNAs were cloned into centromeric expression vectors under inducible GAL1 promoter in order to vary their expression levels. Since p50 lacks a transactivation domain (TAD), a chimeric construct containing the TAD derived from p65 was also generated (p50TAD) to address its binding and transactivation potential. The p50TAD and p65 had distinct transactivation specificities towards seventeen different κB response elements (κB-REs) where single nucleotide changes could greatly impact transactivation. For four κB-REs, results in yeast were predictive of transactivation potential measured in the human MCF7 cell lines treated with the NF-κB activator TNFα. Transactivation results in yeast correlated only partially with in vitro measured DNA binding affinities, suggesting that features other than strength of interaction with naked DNA affect transactivation, although factors such as chromatin context are kept constant in our isogenic yeast assay. The small molecules BAY11-7082 and ethyl-pyruvate as well as expressed IkBα protein acted as NF-κB inhibitors in yeast, more strongly towards p65. Thus, the yeast-based system can recapitulate NF-κB features found in human cells, thereby providing opportunities to address various NF-κB functions, interactions and chemical modulators.
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Affiliation(s)
- Vasundhara Sharma
- Laboratory of Transcriptional Networks, Centre for Integrative Biology (CIBIO), University of Trento, Trento, Italy
| | - Jennifer J. Jordan
- Laboratory of Transcriptional Networks, Centre for Integrative Biology (CIBIO), University of Trento, Trento, Italy
| | - Yari Ciribilli
- Laboratory of Transcriptional Networks, Centre for Integrative Biology (CIBIO), University of Trento, Trento, Italy
| | - Michael A. Resnick
- Chromosome Stability Group; National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, United States of America
| | - Alessandra Bisio
- Laboratory of Transcriptional Networks, Centre for Integrative Biology (CIBIO), University of Trento, Trento, Italy
| | - Alberto Inga
- Laboratory of Transcriptional Networks, Centre for Integrative Biology (CIBIO), University of Trento, Trento, Italy
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Wang M, Gorasiya S, Antoine DJ, Sitapara RA, Wu W, Sharma L, Yang H, Ashby CR, Vasudevan D, Zur M, Thomas DD, Mantell LL. The compromise of macrophage functions by hyperoxia is attenuated by ethacrynic acid via inhibition of NF-κB-mediated release of high-mobility group box-1. Am J Respir Cell Mol Biol 2015; 52:171-82. [PMID: 24992505 DOI: 10.1165/rcmb.2013-0544oc] [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] [Indexed: 11/24/2022] Open
Abstract
The prolonged exposure to hyperoxia can compromise macrophage functions and contribute to the development of ventilator-associated pneumonia. High levels of extracellular high-mobility group box-1 (HMGB1) in the airways of mice exposed to hyperoxia can directly cause macrophage dysfunction. Hence, inhibition of the release of nuclear HMGB1 into the extracellular milieu may help to maintain macrophage functions under hyperoxic conditions. The present study investigates whether ethacrynic acid (EA) affects hyperoxia-induced HMGB1 release from macrophages and improves their functions. Macrophage-like RAW 264.7 cells and bone marrow-derived macrophages were exposed to different concentrations of EA for 24 hours in the presence of 95% O2. EA significantly decreased the accumulation of extracellular HMGB1 in cultured media. Importantly, the phagocytic activity and migration capability of macrophages were significantly enhanced in EA-treated cells. Interestingly, hyperoxia-induced NF-κB activation was also inhibited in these cells. To determine whether NF-κB plays a role in hyperoxia-induced HMGB1 release, BAY 11-7082, an inhibitor of NF-κB activation, was used. Similar to EA, BAY 11-7082 significantly inhibited the accumulation of extracellular HMGB1 and improved hyperoxia-compromised macrophage migration and phagocytic activity. Furthermore, 24-hour hyperoxic exposure of macrophages caused hyperacetylation of HMGB1 and its subsequent cytoplasmic translocation and release, which were inhibited by EA and BAY 11-7082. Together, these results suggest that EA enhances hyperoxia-compromised macrophage functions by inhibiting HMGB1 hyperacetylation and its release from macrophages, possibly through attenuation of the NF-κB activation. Therefore, the activation of NF-κB could be one of the underlying mechanisms that mediate hyperoxia-compromised macrophage functions.
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Affiliation(s)
- Mao Wang
- 1 Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, New York
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113
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Dilwali S, Briët MC, Kao SY, Fujita T, Landegger LD, Platt MP, Stankovic KM. Preclinical validation of anti-nuclear factor-kappa B therapy to inhibit human vestibular schwannoma growth. Mol Oncol 2015; 9:1359-70. [PMID: 25891780 DOI: 10.1016/j.molonc.2015.03.009] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Revised: 02/22/2015] [Accepted: 03/23/2015] [Indexed: 01/25/2023] Open
Abstract
Vestibular schwannomas (VSs), the most common tumors of the cerebellopontine angle, arise from Schwann cells lining the vestibular nerve. Pharmacotherapies against VS are almost non-existent. Although the therapeutic inhibition of inflammatory modulators has been established for other neoplasms, it has not been explored in VS. A bioinformatic network analysis of all genes reported to be differentially expressed in human VS revealed a pro-inflammatory transcription factor nuclear factor-kappa B (NF-κB) as a central molecule in VS pathobiology. Assessed at the transcriptional and translational level, canonical NF-κB complex was aberrantly activated in human VS and derived VS cultures in comparison to control nerves and Schwann cells, respectively. Cultured primary VS cells and VS-derived human cell line HEI-193 were treated with specific NF-κB siRNAs, experimental NF-κB inhibitor BAY11-7082 (BAY11) and clinically relevant NF-κB inhibitor curcumin. Healthy human control Schwann cells from the great auricular nerve were also treated with BAY11 and curcumin to assess toxicity. All three treatments significantly reduced proliferation in primary VS cultures and HEI-193 cells, with siRNA, 5 μM BAY11 and 50 μM curcumin reducing average proliferation (±standard error of mean) to 62.33% ± 10.59%, 14.3 ± 9.7%, and 23.0 ± 20.9% of control primary VS cells, respectively. These treatments also induced substantial cell death. Curcumin, unlike BAY11, also affected primary Schwann cells. This work highlights NF-κB as a key modulator in VS cell proliferation and survival and demonstrates therapeutic efficacy of directly targeting NF-κB in VS.
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Affiliation(s)
- Sonam Dilwali
- Eaton Peabody Laboratories, Department of Otolaryngology, 243 Charles Street, Massachusetts Eye and Ear Infirmary, Boston, MA 02114, USA; Harvard-MIT Program in Speech and Hearing Bioscience and Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA.
| | - Martijn C Briët
- Eaton Peabody Laboratories, Department of Otolaryngology, 243 Charles Street, Massachusetts Eye and Ear Infirmary, Boston, MA 02114, USA; Department of Otorhinolaryngology, Leiden University Medical Centre, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands.
| | - Shyan-Yuan Kao
- Eaton Peabody Laboratories, Department of Otolaryngology, 243 Charles Street, Massachusetts Eye and Ear Infirmary, Boston, MA 02114, USA.
| | - Takeshi Fujita
- Eaton Peabody Laboratories, Department of Otolaryngology, 243 Charles Street, Massachusetts Eye and Ear Infirmary, Boston, MA 02114, USA; Department of Otology and Laryngology, Harvard Medical School, 25 Shattuck Street, Boston, MA 02115, USA.
| | - Lukas D Landegger
- Eaton Peabody Laboratories, Department of Otolaryngology, 243 Charles Street, Massachusetts Eye and Ear Infirmary, Boston, MA 02114, USA; Department of Otology and Laryngology, Harvard Medical School, 25 Shattuck Street, Boston, MA 02115, USA.
| | - Michael P Platt
- Department of Otology and Laryngology, Harvard Medical School, 25 Shattuck Street, Boston, MA 02115, USA; Department of Otolaryngology-Head and Neck Surgery, Boston University, 72 E Concord Street, Boston, MA 02118, USA.
| | - Konstantina M Stankovic
- Eaton Peabody Laboratories, Department of Otolaryngology, 243 Charles Street, Massachusetts Eye and Ear Infirmary, Boston, MA 02114, USA; Harvard-MIT Program in Speech and Hearing Bioscience and Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA; Department of Otology and Laryngology, Harvard Medical School, 25 Shattuck Street, Boston, MA 02115, USA.
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Kolati SR, Kasala ER, Bodduluru LN, Mahareddy JR, Uppulapu SK, Gogoi R, Barua CC, Lahkar M. BAY 11-7082 ameliorates diabetic nephropathy by attenuating hyperglycemia-mediated oxidative stress and renal inflammation via NF-κB pathway. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2015; 39:690-699. [PMID: 25704036 DOI: 10.1016/j.etap.2015.01.019] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2014] [Revised: 01/22/2015] [Accepted: 01/28/2015] [Indexed: 06/04/2023]
Abstract
Diabetic nephropathy is a serious microvascular complication for patients associated with diabetes mellitus. Recent studies have suggested that NF-κB is the main transcription factor for the inflammatory response mediated progression of diabetic nephropathy. Hence, the present study is hypothesized to explore the renoprotective nature of BAY 11-7082 an IκB phosphorylation inhibitor on Streptozotocin (STZ) induced diabetic nephropathy in Sprague-Dawley (SD) rats. Male SD rats were divided into five groups, group I sham control, group II drug control, group III diabetic control (STZ 50mg/kg), group IV and V are test drug groups to which a single dose of STZ 50mg/kg was injected initially and later received BAY 11-7082 1mg/kg and 3mg/kg, respectively from 5th to 8th week. Eight weeks after STZ injection, diabetic rats exhibited significant renal dysfunction, as evidenced by reduced creatinine clearance, increased blood glucose, urea nitrogen and creatinine, which were reversed to near normal by BAY 11-7082. BAY 11-7082 treated rats showed significant improvement in the decreased enzymatic antioxidant SOD, non-enzymatic antioxidant GSH levels, and elevated lipid peroxidation and nitric oxide levels as observed in the diabetic rats. BAY 11-7082 treatment was found to significantly recover kidney histological architecture in the diabetic rats. Altered levels of inflammatory cytokines like TNF-α, IL-1β, IL-6 and nuclear transcriptional factor subunit NF-κB p65 were reverted to the normal level upon treatment with BAY 11-7082. Our results suggest that by limiting the activation of NF-κB, thereby reducing the expression of inflammatory cytokines and by inhibiting the oxidative damage BAY 11-7082 protect the rats against diabetic nephropathy.
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Affiliation(s)
- Sambasiva Rao Kolati
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research-Guwahati, Bhangagarh 781032, Assam, India
| | - Eshvendar Reddy Kasala
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research-Guwahati, Bhangagarh 781032, Assam, India.
| | - Lakshmi Narendra Bodduluru
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research-Guwahati, Bhangagarh 781032, Assam, India
| | - Jalandhar Reddy Mahareddy
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research-Guwahati, Bhangagarh 781032, Assam, India
| | - Shravan Kumar Uppulapu
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research-Guwahati, Bhangagarh 781032, Assam, India
| | - Ranadeep Gogoi
- Department of Biotechnology, National Institute of Pharmaceutical Education and Research-Guwahati, Bhangagarh 781032, Assam, India
| | - Chandana C Barua
- Department of Pharmacology and Toxicology, College of Veterinary Sciences, Khanapara 781022, Assam, India
| | - Mangala Lahkar
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research-Guwahati, Bhangagarh 781032, Assam, India; Department of Pharmacology, Gauhati Medical College and Hospital, Bhangagarh 781032, Assam, India
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115
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Liu RT, Wang A, To E, Gao J, Cao S, Cui JZ, Matsubara JA. Vinpocetine inhibits amyloid-beta induced activation of NF-κB, NLRP3 inflammasome and cytokine production in retinal pigment epithelial cells. Exp Eye Res 2014; 127:49-58. [PMID: 25041941 DOI: 10.1016/j.exer.2014.07.003] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Revised: 06/13/2014] [Accepted: 07/07/2014] [Indexed: 10/25/2022]
Abstract
Chronic inflammation is a key pathogenic process in age-related macular degeneration (AMD). Amyloid-beta (Aβ) is a constituent of AMD drusen and promotes the activation of NLRP3 inflammasome which facilitates the production of cytokines. We investigated the role of transcription factor NF-κB in the activation of inflammasome in the RPE and the effect of vinpocetine, a dietary supplement with inhibitory effect on NF-κΒ. ARPE19/NF-κB-luciferase reporter cells treated with Aβ demonstrated enhanced NF-κB activation that was significantly suppressed by vinpocetine. Intraperitoneal injection of vinpocetine (15 mg/kg) inhibited NF-κB nuclear translocation and reduced the expression and activation of NLRP3, caspase-1, IL-1β, IL-18, and TNF-α in the RPE of adult rats that received intraocular Αβ, as measured by retinal immunohistochemistry and Western blot. Cytokine level in the vitreous was assayed using multiplex suspension arrays and revealed significantly lower concentration of MIP-3α, IL-6, IL-1α, IL-1β, IL-18, and TNF-α in vinpocetine treated animals. These results suggest that the NF-κB pathway is activated by Aβ in the RPE and signals the priming of NLRP3 inflammasome and the expression of pro-inflammatory cytokines including the inflammasome substrates IL-1β and IL-18. NF-κB inhibition may be an effective approach to stem the chronic inflammatory milieu that underlies the development of AMD. Vinpocetine is a potentially useful anti-inflammatory agent that is well-tolerated in long term use.
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Affiliation(s)
- Ruozhou Tom Liu
- Department of Ophthalmology and Visual Sciences, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Aikun Wang
- Department of Ophthalmology and Visual Sciences, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Eleanor To
- Department of Ophthalmology and Visual Sciences, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Jiangyuan Gao
- Department of Ophthalmology and Visual Sciences, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Sijia Cao
- Department of Ophthalmology and Visual Sciences, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Jing Z Cui
- Department of Ophthalmology and Visual Sciences, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Joanne A Matsubara
- Department of Ophthalmology and Visual Sciences, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada.
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116
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Wang X, Wang H, Li G, Song Y, Wang S, Zhu F, Guo C, Zhang L, Shi Y. Activated macrophages down-regulate expression of E-cadherin in hepatocellular carcinoma cells via NF-κB/Slug pathway. Tumour Biol 2014; 35:8893-901. [PMID: 24894673 DOI: 10.1007/s13277-014-2159-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Accepted: 05/27/2014] [Indexed: 12/12/2022] Open
Abstract
Hepatocellular carcinomas are an aggressive malignancy mainly due to metastasis or postsurgical recurrence. Expression of E-cadherin is strongly reduced in Hepatocellular carcinoma (HCC) tissues, and its downregulation is connected to invasiveness and metastasis in hepatocellular carcinomas. The previous study showed that the supernatant from activated macrophages can downregulate the expression of E-cadherin in HCC cells. The partial known molecular mechanism is that tyrosine kinases c-Src- and EGFR phosphorylate β-catenin and E-cadherin leading to destabilization of E-cadherin/β-catenin complex. The aim of this study is to clarify other mechanism by which activated macrophages downregulate the expression of E-cadherin. We detect the expression of E-cadherin and macrophage infiltration in hepatocellular carcinoma tissues by double-staining immunohistochemistry and evaluate the relationship between macrophages and E-cadherin expression in hepatocellular carcinoma cells in vitro experiments. We found that reduced expression of E-cadherin was associated with macrophage infiltration along the border between the tumor nest and stroma in hepatocellular carcinoma tissues. Besides, protein expression of E-cadherin was significantly decreased in hepatocellular carcinoma cells co-cultured with macrophages derived from THP-1 cells. Consistently, mRNA expression of E-cadherin was also decreased in cancer cells co-cultured with THP-1-differentiated macrophages. Moreover, the downregulation of E-cadherin expression was companied by upregulation of Slug expression in cancer cells with conditional medium from THP-1-differentiated macrophage culture. The change in expression of E-cadherin and Slug was abrogated when NF-κB signaling pathway was blocked. All the findings suggested that macrophages contributed to the decreased expression of E-cadherin by NF-κB/Slug pathway in hepatocellular carcinomas.
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Affiliation(s)
- Xianteng Wang
- Institute of Immunology, Shandong University School of Medicine, #44 Wenhua Xi Road, Jinan, 250012, China
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Amaya M, Voss K, Sampey G, Senina S, de la Fuente C, Mueller C, Calvert V, Kehn-Hall K, Carpenter C, Kashanchi F, Bailey C, Mogelsvang S, Petricoin E, Narayanan A. The role of IKKβ in Venezuelan equine encephalitis virus infection. PLoS One 2014; 9:e86745. [PMID: 24586253 PMCID: PMC3929299 DOI: 10.1371/journal.pone.0086745] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2013] [Accepted: 12/13/2013] [Indexed: 01/13/2023] Open
Abstract
Venezuelan equine encephalitis virus (VEEV) belongs to the genus Alphavirus, family Togaviridae. VEEV infection is characterized by extensive inflammation and studies from other laboratories implicated an involvement of the NF-κB cascade in the in vivo pathology. Initial studies indicated that at early time points of VEEV infection, the NF-κB complex was activated in cells infected with the TC-83 strain of VEEV. One upstream kinase that contributes to the phosphorylation of p65 is the IKKβ component of the IKK complex. Our previous studies with Rift valley fever virus, which exhibited early activation of the NF-κB cascade in infected cells, had indicated that the IKKβ component underwent macromolecular reorganization to form a novel low molecular weight form unique to infected cells. This prompted us to investigate if the IKK complex undergoes a comparable macromolecular reorganization in VEEV infection. Size-fractionated VEEV infected cell extracts indicated a macromolecular reorganization of IKKβ in VEEV infected cells that resulted in formation of lower molecular weight complexes. Well-documented inhibitors of IKKβ function, BAY-11-7082, BAY-11-7085 and IKK2 compound IV, were employed to determine whether IKKβ function was required for the production of infectious progeny virus. A decrease in infectious viral particles and viral RNA copies was observed with inhibitor treatment in the attenuated and virulent strains of VEEV infection. In order to further validate the requirement of IKKβ for VEEV replication, we over-expressed IKKβ in cells and observed an increase in viral titers. In contrast, studies carried out using IKKβ(-/-) cells demonstrated a decrease in VEEV replication. In vivo studies demonstrated that inhibitor treatment of TC-83 infected mice increased their survival. Finally, proteomics studies have revealed that IKKβ may interact with the viral protein nsP3. In conclusion, our studies have revealed that the host IKKβ protein may be critically involved in VEEV replication.
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Affiliation(s)
- Moushimi Amaya
- National Center for Biodefense and Infectious Diseases, George Mason University, Manassas, Virginia, United States of America
| | - Kelsey Voss
- National Center for Biodefense and Infectious Diseases, George Mason University, Manassas, Virginia, United States of America
| | - Gavin Sampey
- National Center for Biodefense and Infectious Diseases, George Mason University, Manassas, Virginia, United States of America
| | - Svetlana Senina
- National Center for Biodefense and Infectious Diseases, George Mason University, Manassas, Virginia, United States of America
| | - Cynthia de la Fuente
- National Center for Biodefense and Infectious Diseases, George Mason University, Manassas, Virginia, United States of America
| | - Claudius Mueller
- Center for Applied Proteomics and Personalized Medicine, George Mason University, Manassas, Virginia, United States of America
| | - Valerie Calvert
- Center for Applied Proteomics and Personalized Medicine, George Mason University, Manassas, Virginia, United States of America
| | - Kylene Kehn-Hall
- National Center for Biodefense and Infectious Diseases, George Mason University, Manassas, Virginia, United States of America
| | - Calvin Carpenter
- National Center for Biodefense and Infectious Diseases, George Mason University, Manassas, Virginia, United States of America
| | - Fatah Kashanchi
- National Center for Biodefense and Infectious Diseases, George Mason University, Manassas, Virginia, United States of America
| | - Charles Bailey
- National Center for Biodefense and Infectious Diseases, George Mason University, Manassas, Virginia, United States of America
| | | | - Emanuel Petricoin
- Center for Applied Proteomics and Personalized Medicine, George Mason University, Manassas, Virginia, United States of America
| | - Aarthi Narayanan
- National Center for Biodefense and Infectious Diseases, George Mason University, Manassas, Virginia, United States of America
- * E-mail:
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118
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Histone deacetylase inhibitors potentiate vesicular stomatitis virus oncolysis in prostate cancer cells by modulating NF-κB-dependent autophagy. J Virol 2013; 88:2927-40. [PMID: 24371063 DOI: 10.1128/jvi.03406-13] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Vesicular stomatitis virus (VSV) is an oncolytic virus that induces cancer cell death through activation of the apoptotic pathway. Intrinsic resistance to oncolysis is found in some cell lines and many primary tumors as a consequence of residual innate immunity to VSV. In resistant-tumor models, VSV oncolytic potential can be reversibly stimulated by combination with epigenetic modulators, such as the histone deacetylase inhibitor vorinostat. Based on this reversible effect of vorinostat, we reasoned that critical host genes involved in oncolysis may likewise be reversibly regulated by vorinostat. A transcriptome analysis in prostate cancer PC3 cells identified a subset of NF-κB target genes reversibly regulated by vorinostat, as well as a group of interferon (IFN)-stimulated genes (ISGs). Consistent with the induction of NF-κB target genes, vorinostat-mediated enhancement of VSV oncolysis increased hyperacetylation of NF-κB RELA/p65. Additional bioinformatics analysis revealed that NF-κB signaling also increased the expression of several autophagy-related genes. Kinetically, autophagy preceded apoptosis, and apoptosis was observed only when cells were treated with both VSV and vorinostat. VSV replication and cell killing were suppressed when NF-κB signaling was inhibited using pharmacological or genetic approaches. Inhibition of autophagy by 3-methyladenine (3-MA) enhanced expression of ISGs, and either 3-MA treatment or genetic ablation of the autophagic marker Atg5 decreased VSV replication and oncolysis. Together, these data demonstrate that vorinostat stimulates NF-κB activity in a reversible manner via modulation of RELA/p65 signaling, leading to induction of autophagy, suppression of the IFN-mediated response, and subsequent enhancement of VSV replication and apoptosis.
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120
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Manna S, Singha B, Phyo SA, Gatla HR, Chang TP, Sanacora S, Ramaswami S, Vancurova I. Proteasome inhibition by bortezomib increases IL-8 expression in androgen-independent prostate cancer cells: the role of IKKα. THE JOURNAL OF IMMUNOLOGY 2013; 191:2837-46. [PMID: 23894194 DOI: 10.4049/jimmunol.1300895] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Expression of the proinflammatory and proangiogenic chemokine IL-8, which is regulated at the transcriptional level by NF-κB, is constitutively increased in androgen-independent metastatic prostate cancer and correlates with poor prognosis. Inhibition of NF-κB-dependent transcription was used as an anticancer strategy for the development of the first clinically approved 26S proteasome inhibitor, bortezomib (BZ). Even though BZ has shown remarkable antitumor activity in hematological malignancies, it has been less effective in prostate cancer and other solid tumors; however, the mechanisms have not been fully understood. In this article, we report that proteasome inhibition by BZ unexpectedly increases IL-8 expression in androgen-independent prostate cancer PC3 and DU145 cells, whereas expression of other NF-κB-regulated genes is inhibited or unchanged. The BZ-increased IL-8 expression is associated with increased in vitro p65 NF-κB DNA binding activity and p65 recruitment to the endogenous IL-8 promoter. In addition, proteasome inhibition induces a nuclear accumulation of IκB kinase (IKK)α, and inhibition of IKKα enzymatic activity significantly attenuates the BZ-induced p65 recruitment to IL-8 promoter and IL-8 expression, demonstrating that the induced IL-8 expression is mediated, at least partly, by IKKα. Together, these data provide the first evidence, to our knowledge, for the gene-specific increase of IL-8 expression by proteasome inhibition in prostate cancer cells and suggest that targeting both IKKα and the proteasome may increase BZ effectiveness in treatment of androgen-independent prostate cancer.
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Affiliation(s)
- Subrata Manna
- Department of Biological Sciences, St. John's University, New York, NY 11439, USA
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121
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Parveen N, Varman R, Nair S, Das G, Ghosh S, Mukhopadhyay S. Endocytosis of Mycobacterium tuberculosis heat shock protein 60 is required to induce interleukin-10 production in macrophages. J Biol Chem 2013; 288:24956-71. [PMID: 23846686 DOI: 10.1074/jbc.m113.461004] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Understanding the signaling pathways involved in the regulation of anti-inflammatory and pro-inflammatory responses in tuberculosis is extremely important in tailoring a macrophage innate response to promote anti-tuberculosis immunity in the host. Although the role of toll-like receptors (TLRs) in the regulation of anti-inflammatory and pro-inflammatory responses is known, the detailed molecular mechanisms by which the Mycobacterium tuberculosis bacteria modulate these innate responses are not clearly understood. In this study, we demonstrate that M. tuberculosis heat shock protein 60 (Mtbhsp60, Cpn60.1, and Rv3417c) interacts with both TLR2 and TLR4 receptors, but its interaction with TLR2 leads to clathrin-dependent endocytosis resulting in an increased production of interleukin (IL)-10 and activated p38 MAPK. Blockage of TLR2-mediated endocytosis inhibited IL-10 production but induced production of tumor necrosis factor (TNF)-α and activated ERK1/2. In contrast, upon interaction with TLR4, Mtbhsp60 remained predominantly localized on the cell surface due to poorer endocytosis of the protein that led to decreased IL-10 production and p38 MAPK activation. The Escherichia coli homologue of hsp60 was found to be retained mainly on the macrophage surface upon interaction with either TLR2 or TLR4 that triggered predominantly a pro-inflammatory-type immune response. Our data suggest that cellular localization of Mtbhsp60 upon interaction with TLRs dictates the type of polarization in the innate immune responses in macrophages. This information is likely to help us in tailoring the host protective immune responses against M. tuberculosis.
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Affiliation(s)
- Nazia Parveen
- Molecular Cell Biology, Centre for DNA Fingerprinting and Diagnostics, Nampally, Hyderabad 500001 India
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122
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Krishnan N, Bencze G, Cohen P, Tonks NK. The anti-inflammatory compound BAY-11-7082 is a potent inhibitor of protein tyrosine phosphatases. FEBS J 2013; 280:2830-41. [PMID: 23578302 DOI: 10.1111/febs.12283] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Revised: 04/06/2013] [Accepted: 04/08/2013] [Indexed: 02/07/2023]
Abstract
The families of protein tyrosine phosphatases (PTPs) and protein tyrosine kinases (PTKs) function in a coordinated manner to regulate signal transduction events that are critical for cellular homeostasis. Aberrant tyrosine phosphorylation, resulting from disruption of either PTP or PTK function, has been shown to be the cause of major human diseases, including cancer and diabetes. Consequently, the characterization of small-molecule inhibitors of these kinases and phosphatases may not only provide molecular probes with which to define the significance of particular signaling events, but also may have therapeutic implications. BAY-11-7082 is an anti-inflammatory compound that has been reported to inhibit IκB kinase activity. The compound has an α,β-unsaturated electrophilic center, which confers the property of being a Michael acceptor; this suggests that it may react with nucleophilic cysteine-containing proteins, such as PTPs. In this study, we demonstrated that BAY-11-7082 was a potent, irreversible inhibitor of PTPs. Using mass spectrometry, we have shown that BAY-11-7082 inactivated PTPs by forming a covalent adduct with the active-site cysteine. Administration of the compound caused an increase in protein tyrosine phosphorylation in RAW 264 macrophages, similar to the effects of the generic PTP inhibitor sodium orthovanadate. These data illustrate that BAY-11-7082 is an effective pan-PTP inhibitor with cell permeability, revealing its potential as a new probe for chemical biology approaches to the study of PTP function. Furthermore, the data suggest that inhibition of PTP function may contribute to the many biological effects of BAY-11-7082 that have been reported to date.
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Affiliation(s)
- Navasona Krishnan
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724-2208, USA
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Mihajlovic D, Rajkovic I, Chinou I, Colic M. Dose-dependent immunomodulatory effects of 10-hydroxy-2-decenoic acid on human monocyte-derived dendritic cells. J Funct Foods 2013. [DOI: 10.1016/j.jff.2013.01.031] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Rauert-Wunderlich H, Siegmund D, Maier E, Giner T, Bargou RC, Wajant H, Stühmer T. The IKK inhibitor Bay 11-7082 induces cell death independent from inhibition of activation of NFκB transcription factors. PLoS One 2013; 8:e59292. [PMID: 23527154 PMCID: PMC3603909 DOI: 10.1371/journal.pone.0059292] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Accepted: 02/13/2013] [Indexed: 01/01/2023] Open
Abstract
Multiple myeloma (MM) displays an NFκB activity-related gene expression signature and about 20% of primary MM samples harbor genetic alterations conducive to intrinsic NFκB signaling activation. The relevance of blocking the classical versus the alternative NFκB signaling pathway and the molecular execution mechanisms involved, however, are still poorly understood. Here, we comparatively tested NFκB activity abrogation through TPCA-1 (an IKK2 inhibitor), BAY 11-7082 (an IKK inhibitor poorly selective for IKK1 and IKK2), and MLN4924 (an NEDD8 activating enzyme (NAE)-inhibitor), and analyzed their anti-MM activity. Whereas TPCA-1 interfered selectively with activation of the classical NFκB pathway, the other two compounds inhibited classical and alternative NFκB signaling without significant discrimination. Noteworthy, whereas TPCA-1 and MLN4924 elicited rather mild anti-MM effects with slight to moderate cell death induction after 1 day BAY 11-7082 was uniformly highly toxic to MM cell lines and primary MM cells. Treatment with BAY 11-7082 induced rapid cell swelling and its initial effects were blocked by necrostatin-1 or the ROS scavenger BHA, but a lasting protective effect was not achieved even with additional blockade of caspases. Because MLN4924 inhibits the alternative NFκB pathway downstream of IKK1 at the level of p100 processing, the quite discordant effects between MLN4924 and BAY 11-7082 must thus be due to blockade of IKK1-mediated NFκB-independent necrosis-inhibitory functions or represent an off-target effect of BAY 11-7082. In accordance with the latter, we further observed that concomitant knockdown of IKK1 and IKK2 did not have any major short-term adverse effect on the viability of MM cells.
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Affiliation(s)
- Hilka Rauert-Wunderlich
- Division of Molecular Internal Medicine, Department of Internal Medicine II, University of Würzburg, Würzburg, Germany
| | - Daniela Siegmund
- Division of Molecular Internal Medicine, Department of Internal Medicine II, University of Würzburg, Würzburg, Germany
| | - Eduard Maier
- Department of Internal Medicine II, Comprehensive Cancer Center Mainfranken, University of Würzburg, Würzburg, Germany
| | - Tina Giner
- Department of Dermatology, University of Würzburg, Würzburg, Germany
| | - Ralf C. Bargou
- Department of Internal Medicine II, Comprehensive Cancer Center Mainfranken, University of Würzburg, Würzburg, Germany
| | - Harald Wajant
- Division of Molecular Internal Medicine, Department of Internal Medicine II, University of Würzburg, Würzburg, Germany
- * E-mail:
| | - Thorsten Stühmer
- Department of Internal Medicine II, Comprehensive Cancer Center Mainfranken, University of Würzburg, Würzburg, Germany
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