318 results on '"Nf κb activation"'
Search Results
2. Implication of NF-κB Activation on Ozone-Induced HO-1 Activation
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Satoshi Nagashima, Misa Togi, Tadashi Matsuda, Ryuta Muromoto, Yuichi Kitai, Jun-ichi Kashiwakura, Sumihito Togi, and Toshiaki Miura
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Ozone ,Nrf2 signaling ,Ozone therapy ,medicine.disease_cause ,Cell biology ,Nf κb signaling ,chemistry.chemical_compound ,chemistry ,NF-κB signaling ,medicine ,oxidative stress ,General Agricultural and Biological Sciences ,Nf κb activation ,Oxidative stress ,ozone therapy - Abstract
The controlled and moderate oxidative stress such as ozone induces both inflammatory and anti-inflammatory response. This balance is important for homeostasis of living organisms. Furthermore, it has been shown that this conflict response is mainly regulated by two transcriptional factors, nuclear transcriptional factor κB (NF-κB) and nuclear factor erythroid 2-related factor 2 (Nrf2). NF-κB is involved in inflammatory responses by regulating expression of cyclooxygenase-2 (COX-2) and various inflammatory cytokines while Nrf2 is involved in anti-inflammatory responses by controlling expression of numerous antioxidant enzymes such as heme oxygenase-1 (HO-1). We here demonstrate the molecular mechanisms of the crosstalk between NF-κB and Nrf2 activation during the moderate oxidative stress induced by ozone. We first confirmed the activation of NF-κB and Nrf2 signaling during the moderate oxidative stress in HeLa cells. Induction of NF-κB-mediated COX-2 mRNA expression was observed at the early phase after stimulation (30-60 min after ozone treatment). However, induction of HO-1 mRNA expression was observed at the late phase of stimulation (6 h after stimulation). To reveal the crosstalk between NF-κB and Nrf2, we tested whether reduction of NF-κB expression affects ozone-induced Nrf2 activation by knocking down of NF-κB in HeLa cells. Importantly, the HO-1 induction by ozone was remarkably decreased by a reduction in NF-κB expression. These results suggest that the moderate oxidative stress by ozone initially induces NF-κB activation, and this NF-κB activation is required for HO-1 induction at the late phase of the moderate stress.
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- 2021
3. Cuttlebone Shows Anti-inflammatory Activity Via Suppression of NF-κB Activation in LPS-induced RAW 264.7 Macrophages
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Tae Jin Kang and Geum Seon Lee
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education.field_of_study ,Chemistry ,medicine.drug_class ,Inflammation ,NF-κB ,General Medicine ,Anti-inflammatory ,chemistry.chemical_compound ,Cuttlebone ,medicine ,Cancer research ,medicine.symptom ,education ,Nf κb activation - Published
- 2021
4. Friedelin Protects Against Alveolar Epithelial Cells Apoptosis in Lps-Induced Acute Pneumonia in Neonatal Rats by Suppressing NF-κB Activation
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Tao Han, Juan Tian, and Minjuan Pan
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chemistry.chemical_compound ,Nutrition and Dietetics ,Apoptosis ,Chemistry ,Friedelin ,Cancer research ,Medicine (miscellaneous) ,Acute pneumonia ,Nf κb activation - Abstract
Neonatal pneumonia is caused by inflammation mediated by lipopolysaccharide from gram negative bacteria. This type of pneumonia is characterized by inflammatory and apoptotic responses. In this study, we have examined the effect of friedelin on lipopolysaccharide-induced pneumonia and the role of nuclear factor kappa B in this process. Also, using the human pulmonary alveolar epithelial cells as a model we examined the effect of lipopolysaccharide on the cell apoptosis and its protection by friedelin. The results show that friedelin prevented lipopolysaccharide-induced acute pneumonia in neonatal rats and cellular apoptosis by suppressing the nuclear factor kappa B signaling pathway. In summary, this study shows that the friedelin exhibits a remarkable protective effect on lung tissues exposed to lipopolysaccharides.
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- 2020
5. Essential Oils of Cedrus deodara Leaves Exerting Anti-inflammation on TPA-induced Ear Edema by Inhibiting COX-2/TNF-α/NF-κB Activation
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Peng Xu, Yaohui Shi, Xiaoxin Liang, Lanyue Zhang, Lejing Chi, Tongyun Wu, Han Ping, Zhiyun Du, Li Lin, Yu Chen, and Mao Ye
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biology ,010405 organic chemistry ,business.industry ,Organic Chemistry ,Cedrus deodara ,Anti inflammation ,Pharmacology ,biology.organism_classification ,01 natural sciences ,Biochemistry ,Cedrus ,0104 chemical sciences ,Analytical Chemistry ,law.invention ,010404 medicinal & biomolecular chemistry ,law ,Medicine ,Nf κb activation ,business ,Essential oil ,Ear edema - Abstract
Cedrus deodara is a cedar plant from the Pinaceae family. Because Cedrus is widely used in health care products, cosmetics, medicine, and insecticides, the essential oils of Cedrus deodara (CDEOs) ...
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- 2020
6. RETRACTED ARTICLE: A New Coordination Polymer Based on Two Dual-Functional Ligands: Structural Insights and Treatment Effect Against Inflammatory Metrorrhagia by Inhibiting NF-κb Activation and IL-1β Release
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H. Y. Ren, L. Fu, and Yuan Li
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Coordination polymer ,Metrorrhagia ,Nanoparticle ,010402 general chemistry ,010403 inorganic & nuclear chemistry ,01 natural sciences ,Medicinal chemistry ,Chemical formula ,Signal pathway ,0104 chemical sciences ,Inorganic Chemistry ,chemistry.chemical_compound ,chemistry ,Materials Chemistry ,medicine ,Antiinflammatory Effect ,Treatment effect ,Physical and Theoretical Chemistry ,medicine.symptom ,Nf κb activation - Abstract
By the mixed-ligand approach, a new coordination polymer with the chemical formula [Cd(bpydb)(bimb)(H2O)](H2O)3(1, H2bpydb = 4,4′-([2,4′-bipyridine]-2′,6′-diyl)dibenzoic acid, bimb = 5,5′-bis(1H-benzo[d]imidazol-2-yl)-2,2′-bipyridine) is successfully prepared via a hydrothermal reaction of Cd(NO3)4H2O, H2bpydb, and bimb in the presence of NaOH as the pH modulator. Furthermore, we use an ultrasonic method to obtain nanoparticles of 1 with an average thickness of 126 nm. To evaluate the antiinflammatory effect of the compound against inflammatory metrorrhagia, the activation of NF-κb signal pathway is measured by RT-PCR. Furthermore, ELSA is used in this research to detect the IL-1β and IL-18 content.
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- 2020
7. Long Noncoding RNA DRAIC Inhibits Prostate Cancer Progression by Interacting with IKK to Inhibit NF-κB Activation
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Anindya Dutta, Marty W. Mayo, Manjari Kiran, Ajay Chatrath, David Wotton, Shekhar Saha, and Canan Kuscu
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Male ,Cancer Research ,Urology ,Down-Regulation ,IκB kinase ,Article ,Mice ,Prostate cancer ,Downregulation and upregulation ,Cell Line, Tumor ,medicine ,Animals ,Humans ,Phosphorylation ,Transcription factor ,Regulation of gene expression ,business.industry ,Chemistry ,Kinase ,Prostate ,NF-kappa B ,Prostatic Neoplasms ,RNA ,NFKB1 ,medicine.disease ,Xenograft Model Antitumor Assays ,Long non-coding RNA ,I-kappa B Kinase ,Gene Expression Regulation, Neoplastic ,IκBα ,Oncology ,Disease Progression ,Cancer research ,RNA, Long Noncoding ,Signal transduction ,Nf κb activation ,business ,Signal Transduction - Abstract
DRAIC is a 1.7 kb spliced long noncoding RNA downregulated in castration-resistant advanced prostate cancer. Decreased DRAIC expression predicts poor patient outcome in prostate and seven other cancers, while increased DRAIC represses growth of xenografted tumors. Here, we show that cancers with decreased DRAIC expression have increased NF-κB target gene expression. DRAIC downregulation increased cell invasion and soft agar colony formation; this was dependent on NF-κB activation. DRAIC interacted with subunits of the IκB kinase (IKK) complex to inhibit their interaction with each other, the phosphorylation of IκBα, and the activation of NF-κB. These functions of DRAIC mapped to the same fragment containing bases 701–905. Thus, DRAIC lncRNA inhibits prostate cancer progression through suppression of NF-κB activation by interfering with IKK activity. Significance: A cytoplasmic tumor-suppressive lncRNA interacts with and inhibits a major kinase that activates an oncogenic transcription factor in prostate cancer.
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- 2020
8. Green chicory leaf extract exerts anti-inflammatory effects through suppressing LPS-induced MAPK/NF-κB activation and hepatoprotective activity in vitro
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Seo Hyun Park, Jae Gon Kim, Beong Ou Lim, and Al Borhan Bayazid
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lcsh:Immunologic diseases. Allergy ,MAPK/ERK pathway ,medicine.drug_class ,Immunology ,Inflammation ,Pharmacology ,chicory leaf ,01 natural sciences ,Anti-inflammatory ,chemistry.chemical_compound ,0404 agricultural biotechnology ,hep g2 cell ,Cichorium ,medicine ,Gallic acid ,lcsh:Agriculture (General) ,biology ,Chemistry ,010401 analytical chemistry ,04 agricultural and veterinary sciences ,biology.organism_classification ,lcsh:S1-972 ,040401 food science ,In vitro ,macrophages ,0104 chemical sciences ,inflammation ,mapk/nf-κb ,gallic acid ,medicine.symptom ,lcsh:RC581-607 ,Nf κb activation ,Agronomy and Crop Science ,Food Science - Abstract
Green chicory (Cichorium intybus) leaf is consumed worldwide that has tremendous bio-functional activities. This study was designed to elucidate the bio-functional activities of the green chicory leaf extract (CLE). Trolox equivalent antioxidant activities were carried out against DPPH, ABTS radical scavenging and ferric reducing activities. CLE showed remarkable hepatoprotective activity against oxidative damages and reactive oxygen species reducing effect in RAW 264.7 and Hep G2 cells. The anti-inflammatory effects performed on LPS-induced RAW 264.7 cells and primary spleen cells. In RAW 264.7 cells, Chicory leaf extract significantly restored the iNOS, COX-2, IL-6, TNF-α and other pro-inflammatory cytokines in mRNA expression. Meanwhile, it restored NF-κB (P-65) and MAPK pathways activation in immunoblot assay dose-dependently and repressed the P-65 translocation in the nucleus. Moreover, it showed notable anti-proliferative activities and downregulated NF-κB (P-65) and MAPK activation in LPS-stimulated splenocytes. Our findings suggest that CLE could be used as a natural anti-inflammatory agent.
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- 2020
9. RIPK1 expression associates with inflammation in early atherosclerosis in humans and can be therapeutically silenced to reduce NF-κB activation and atherogenesis in mice
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Liang Guo, Zachary Lister, Renu Virmani, Katey J. Rayner, Francis J. Alenghat, Ana Mompeon, Calvin Pan, Dianne Vreeken, Hailey Wyatt, Emma Gordon, Adil Rasheed, Nicola Otte, Joshua W. Kandiah, Ulf Hedin, Patricia Essebier, Denuja Karunakaran, My-Anh Nguyen, Frank D. Kolodgie, Ljubica Perisic Matic, Jason E. Fish, Richard G. Lee, Peter Liu, Henry S. Cheng, Aldons J. Lusis, Richard G. Jung, Michele Geoffrion, and Janine M. van Gils
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0303 health sciences ,Innate immune system ,business.industry ,Inflammation ,030204 cardiovascular system & hematology ,NFKB1 ,03 medical and health sciences ,RIPK1 ,0302 clinical medicine ,Physiology (medical) ,Cancer research ,Medicine ,medicine.symptom ,Cardiology and Cardiovascular Medicine ,Nf κb activation ,business ,030304 developmental biology - Abstract
Background: Chronic activation of the innate immune system drives inflammation and contributes directly to atherosclerosis. We previously showed that macrophages in the atherogenic plaque undergo RIPK3 (receptor-interacting serine/threonine-protein kinase 3)-MLKL (mixed lineage kinase domain-like protein)–dependent programmed necroptosis in response to sterile ligands such as oxidized low-density lipoprotein and damage-associated molecular patterns and that necroptosis is active in advanced atherosclerotic plaques. Upstream of the RIPK3-MLKL necroptotic machinery lies RIPK1 (receptor-interacting serine/threonine-protein kinase 1), which acts as a master switch that controls whether the cell undergoes NF-κB (nuclear factor κ-light-chain-enhancer of activated B cells)–dependent inflammation, caspase-dependent apoptosis, or necroptosis in response to extracellular stimuli. We therefore set out to investigate the role of RIPK1 in the development of atherosclerosis, which is driven largely by NF-κB–dependent inflammation at early stages. We hypothesize that, unlike RIPK3 and MLKL, RIPK1 primarily drives NF-κB–dependent inflammation in early atherogenic lesions, and knocking down RIPK1 will reduce inflammatory cell activation and protect against the progression of atherosclerosis. Methods: We examined expression of RIPK1 protein and mRNA in both human and mouse atherosclerotic lesions, and used loss-of-function approaches in vitro in macrophages and endothelial cells to measure inflammatory responses. We administered weekly injections of RIPK1 antisense oligonucleotides to Apoe −/− mice fed a cholesterol-rich (Western) diet for 8 weeks. Results: We find that RIPK1 expression is abundant in early-stage atherosclerotic lesions in both humans and mice. Treatment with RIPK1 antisense oligonucleotides led to a reduction in aortic sinus and en face lesion areas (47.2% or 58.8% decrease relative to control, P P RIPK1 knockdown in macrophages decreased inflammatory genes (NF-κB, TNFα [tumor necrosis factor α], IL-1α) and in vivo lipopolysaccharide- and atherogenic diet–induced NF-κB activation. In endothelial cells, knockdown of RIPK1 prevented NF-κB translocation to the nucleus in response to TNFα, where accordingly there was a reduction in gene expression of IL1B , E-selectin , and monocyte attachment. Conclusions: We identify RIPK1 as a central driver of inflammation in atherosclerosis by its ability to activate the NF-κB pathway and promote inflammatory cytokine release. Given the high levels of RIPK1 expression in human atherosclerotic lesions, our study suggests RIPK1 as a future therapeutic target to reduce residual inflammation in patients at high risk of coronary artery disease.
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- 2021
10. Regulation of inflammation in canine species: a role for macrophages and Hsp70
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Qingkang Lyu, Eden, W. van, Broere, F., Sijts, E.J.A.M., and University Utrecht
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Chemistry ,Macrophage polarization ,medicine ,Inflammation ,Canine Species ,medicine.symptom ,Nf κb activation ,Leucinostatin ,health care economics and organizations ,humanities ,Hsp70 ,Cell biology ,leucinostatin ,canine retinal pigment epithelial cells ,NF-κB activation ,canine macrophage ,M1 and M2 macrophages ,macrophage polarization ,030D monocyte-like cell line - Abstract
Summary This thesis can be roughly divided into two parts. In the first three chapters, we discussed and studied the role of Hsp70 in retinal pigment epithelial (RPE) cells, and the innate and adaptive immune response. We reviewed the relationship of T cell-mediated diseases and HSPs, and pointed out that the induction of Hsp70 may contribute to therapeutic tolerance (chapter 2). Then, we explored a new Hsp70 co-inducer, leucinostatin, and its role in canine RPE cells (chapter 3). Further, we studied the anti-inflammatory effects of Hsp70 in canine macrophages (chapter 4). In the last two chapters, we focus on various differently activated canine macrophage subsets originating from both primary monocytes and a monocyte-like cell line (030D cell) (chapter 5 and 6). We successfully polarized canine monocyte-derived macrophages (MDMs) into M1 and M2 cells and thoroughly characterized their features (chapter 5). Meanwhile, we demonstrated that 030D cells can be differentiated into M1 and M2 macrophages and that each subset shares the characteristics of the corresponding canine monocyte-derived macrophage subset.
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- 2021
11. Computer vision reveals hidden variables underlying NF-κB activation in single cells
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Nir Drayman, Mustafa Bilgic, Savaş Tay, Parthiv Patel, and Ping Liu
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Multidisciplinary ,Systems Biology ,Hidden variable theory ,SciAdv r-articles ,Biomedicine and Life Sciences ,Cell Biology ,Biology ,Nf κb activation ,Gene ,Sensory cue ,Signal ,Neuroscience ,Research Article - Abstract
Description, An image-based machine learning approach finds mechanisms underlying variable activation of NF-κB pathway in single cells., Individual cells are heterogeneous when responding to environmental cues. Under an external signal, certain cells activate gene regulatory pathways, while others completely ignore that signal. Mechanisms underlying cellular heterogeneity are often inaccessible because experiments needed to study molecular states destroy the very states that we need to examine. Here, we developed an image-based support vector machine learning model to uncover variables controlling activation of the immune pathway nuclear factor κB (NF-κB). Computer vision analysis predicts the identity of cells that will respond to cytokine stimulation and shows that activation is predetermined by minute amounts of “leaky” NF-κB (p65:p50) localization to the nucleus. Mechanistic modeling revealed that the ratio of NF-κB to inhibitor of NF-κB predetermines leakiness and activation probability of cells. While cells transition between molecular states, they maintain their overall probabilities for NF-κB activation. Our results demonstrate how computer vision can find mechanisms behind heterogeneous single-cell activation under proinflammatory stimuli.
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- 2021
12. NF-κB activation in cardiac fibroblasts results in the recruitment of inflammatory Ly6C hi monocytes in pressure-overloaded hearts
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Ajay M. Shah, Jumpei Ito, Shigemiki Omiya, Tomokazu Murakawa, Simon J. Conway, Masahiro Ono, Kinya Otsu, Mihai-Nicolae Podaru, Yohei Tanada, and Hajime Abe
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Pressure overload ,business.industry ,Inflammation ,Cell Biology ,medicine.disease ,Biochemistry ,Pathogenesis ,Heart failure ,Immunology ,Medicine ,medicine.symptom ,business ,Nf κb activation ,Molecular Biology - Abstract
Heart failure is a major public health problem, and inflammation is involved in its pathogenesis. Inflammatory Ly6Chi monocytes accumulate in mouse hearts after pressure overload and are detrimenta...
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- 2021
13. Corrigendum: ZDHHC11 Positively Regulates NF-κB Activation by Enhancing TRAF6 Oligomerization
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Enping Liu, Jiawei Sun, Jing Yang, Lin Li, Qili Yang, Jiuqin Zeng, Jiayu Zhang, Dahua Chen, and Qinmiao Sun
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QH301-705.5 ,NF-κB ,Inflammation ,Cell Biology ,Cell biology ,oligomerization ,chemistry.chemical_compound ,chemistry ,ZDHHC11 ,inflammation ,medicine ,medicine.symptom ,Biology (General) ,Nf κb activation ,TRAF6 ,Developmental Biology - Published
- 2021
14. Noncanonical Nf-κB Activation by Icariin-Triggered CEBP-β/G-CSF Axis Confers Neuroprotection in Ischemic Optic Neuropathy
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Yao-Tseng Wen, Tushar Dnyaneshwar Desai, Jayasimha Daddam Rayalu, and Rong-Kung Tsai
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chemistry.chemical_compound ,genetic structures ,chemistry ,business.industry ,Cancer research ,Medicine ,sense organs ,Ischemic optic neuropathy ,business ,medicine.disease ,Nf κb activation ,Icariin ,Neuroprotection - Abstract
BackgroundAn ischemic insult at the optic nerve is followed by detrimental neuroinflammation that results in the loss of the retinal ganglion cells (RGCs) and vision. NF-κB is the key transcription factor of inflammatory cytokines in response to neuroinflammatory events. Icariin, an anti-inflammatory drug, is involved in the regulation of NF-κB activation. However, the protective mechanisms of icariin-induced NF-κB activation remain little known. Here, the protective mechanisms of icariin-induced NF-κB activation were investigated in experimental optic nerve ischemia. MethodsThe GOLD bio-informatics tool was used to select target drug based on CEBP-β binding affinity. The neuroprotective effects of target drug, Icariin, were assessed by measuring the flash visual electrode potentials, density of fluorogold-labeled cells, and TUNEL-positive cells in ganglion cell layer. The processes affecting RGC death were probed using optical coherence tomography, immunohistochemistry and immunoblotting techniques. ResultsThe simulation analysis and in vivo test demonstrated that the binding complex of icariin and CEBP-β significantly induced endogenous G-CSF expression. A single intravitreal injection of poly(lactic-co-glycolic acid) (PLGA)-icariin preserved visual function and RGC density after optic nerve infarct. The optic nerve edema, RGC apoptosis, and macrophage infiltration were inhibited by treatment with PLGA-icariin. The endogenous G-CSF expression switched the canonical NF-kB activation to the noncanonical NF-kB activation by promoting an alternative phosphorylation reaction of IKK-β. The noncanonical NF-κB activation further promoted the M2 microglia/macrophage polarization and AKT1 activation, which prevented the neuroinflammation and RGC apoptosis Granulocyte colony-stimulating factor. ConclusionOur study concluded that the protective mechanism of icariin is a G-CSF-induced non-canonical NF-kB activation, which may provide a potential therapeutic strategy for a patient with neuroinflammation diseases.
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- 2021
15. IL-33 / ST2 Signaling Promotes TF Expression by Regulating NF-κB Activation in Coronary Artery Endothelial Microparticles
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Jing Tao, Yujuan Yuan, Muyesai Nijiati, and Hui Cheng
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Interleukin 33 ,medicine.anatomical_structure ,business.industry ,medicine ,Cancer research ,General Medicine ,Nf κb activation ,business ,Artery - Abstract
IntroductionInterleukin (IL)-33 was previously shown to induce angiogenesis and inflammatory activation of endothelial Microparticles(EMPs). Tissue factor (TF) plays a central role in hemostasis and thrombosis.Material and methodsThe study analyzed the coronary blood of level of CD31+EMPs, TF protein and IL-33 protein in Acute Myocardial Infarction (AMI) and stable coronary artery disease (SCAD) patients. Human coronary artery endothelial cells (HCAECs) were treated with IL-33 to obtain EMPs. The TF activity of EMPs was tested by Thermo Fisher by adding the TF antibody. Furthermore, TF and Tissue Factor Pathway Inhibitor (TFPI) protein were tested by ELISA. Finally, NF-κB inhibitor dimethyl fumarate (DMF) and soluble extracellular domain of ST2 coupled to the Fc fragment of human IgG1 (sST2) were added to HCAECs which were treated with IL-33, and the TF protein level was also tested by ELISA.ResultsThe AMI patients had higher level of CD31+EMPs, TF protein and IL-33 protein than the SCAD patients in coronary artery. In AMI patients (N=27), the IL-33 protein positively correlated with CD31+EMPs (r=0.794, pConclusionsActivated endothelial cells and EMPs they released simultaneously express TF, which is a risk factor for cardiovascular disease.
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- 2021
16. PPARγ and PGC-1α activators protect against diabetic nephropathy by suppressing the inflammation and NF-κB activation
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Nan Chen, Ying Zhou, Weiming Wang, Yuanmeng Jin, and Liwen Zhang
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Diabetic nephropathy ,business.industry ,Cancer research ,medicine ,Inflammation ,medicine.symptom ,medicine.disease ,business ,Nf κb activation - Abstract
Background: Inflammation played critical roles in the progression of various kidney diseases and leaded to irreversible kidney fibrosis. Peroxisome proliferator-activated receptor gamma (PPARγ) and its coactivator PPARγ coactivator-1 alpha (PGC-1α) negatively regulated mitochondrial biogenesis, cellular energy metabolism, and inflammation. But the cooperative molecular mechanism of them in kidney remained unclear. The aim of present study was to investigate this issue.Methods: Human proximal tubular HK-2 cell line was stimulated by inflammatory factors, and the expression of PPARγ and its coregulators were determined via reverse transcription-quantitative polymerase chain reaction and western blotting, and DNA binding capacity was measured by EMSA. Furthermore, db/db mice were used to establish a diabetic nephropathy model and administrated with PPARγ and PGC-1α activator. Kidney injury was evaluated microscopically, and inflammatory mechanism was assessed by western blotting.Results: Our results revealed that either TNF-α or IL-1b could significantly decreased PPARγ and PGC-1 expression in vitro. Cytokines also obviously inhibited PPARγ DNA binding activities. Meanwhile, we detected rapid activation of NF-κB pathway under the same experimental conditions. PPARγ and PGC-1α activators effectively protect against diabetic nephropathy and suppress NF-κB expression in db/db mice.Conclusions: PPARγ and its coactivator PGC-1α actively participated in the protection against renal inflammation through regulating NF-κB pathway, which highlighted a potential therapeutic target for renal diseases.
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- 2021
17. A Peptide Derived from IKK-Interacting Protein Attenuates NF-κB Activation and Inflammation
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Yunpeng Zhao, Honghai Zhang, Lei Zhang, Hansen Liu, Zhenzhen Yan, Xiaoyuan Ma, Wanxin Zhuang, Xueer Wang, Chengjiang Gao, Yi Zheng, and Bingyu Liu
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Lipopolysaccharides ,Immunology ,Inflammation ,Peptide ,IκB kinase ,Mice ,Cell Line, Tumor ,Gene expression ,medicine ,Immunology and Allergy ,IKK-INTERACTING PROTEIN ,Animals ,Humans ,chemistry.chemical_classification ,Mice, Knockout ,Intracellular Signaling Peptides and Proteins ,NF-kappa B ,Zymosan ,Arthritis, Experimental ,I-kappa B Kinase ,Enzyme Activation ,HEK293 Cells ,chemistry ,Gene Expression Regulation ,IKK complex ,Cancer research ,Phosphorylation ,medicine.symptom ,Nf κb activation ,Peptides ,Protein Binding ,Signal Transduction - Abstract
The IκB kinase (IKK) complex plays a vital role in regulating the NF-κB activation. Aberrant NF-κB activation is involved in various inflammatory diseases. Thus, targeting IKK activation is an ideal therapeutic strategy to cure and prevent inflammatory diseases related to NF-κB activation. In a previous study, we demonstrated that IKK-interacting protein (IKIP) inhibits the phosphorylation of IKKα/β and the activation of NF-κB through disruption of the formation of IKK complex. In this study, we identified a 15-aa peptide derived from mouse IKIP (46–60 aa of IKIP), which specifically suppressed IKK activation and NF-κB targeted gene expression via disrupting the association of IKKβ and NEMO. Importantly, administration of the peptide reduced LPS-induced acute inflammation and attenuated Zymosan-induced acute arthritis in mice. These findings suggest that this IKIP peptide may be a promising therapeutic reagent in the prevention and treatment of inflammatory diseases.
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- 2021
18. Calycosin Ameliorates Inflammatory Paw Edema in Mice via Inhibiting NF-κB Activation
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Yukui Ma, Likun Cui, and Yumei Han
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Pharmacology ,chemistry.chemical_compound ,Calycosin ,chemistry ,Nf κb activation ,Paw edema - Published
- 2019
19. Acupuncture attenuates cognitive impairment, oxidative stress and NF-κB activation in cerebral multi-infarct rats
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Si-Ming Ma, Cun-Zhi Liu, Jing-Wen Yang, Xue-Rui Wang, Qian-Qian Li, and Na-Na Yang
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Male ,Oncology ,medicine.medical_specialty ,Acupuncture Therapy ,Disease ,medicine.disease_cause ,Nuclear factor kappa b ,Internal medicine ,medicine ,Acupuncture ,Animals ,Humans ,Dementia ,Cognitive Dysfunction ,Rats, Wistar ,Cognitive impairment ,Stroke ,business.industry ,NF-kappa B ,Cerebral Infarction ,General Medicine ,medicine.disease ,Rats ,Disease Models, Animal ,Oxidative Stress ,Complementary and alternative medicine ,Calcium ,Neurology (clinical) ,Tumor Suppressor Protein p53 ,Reactive Oxygen Species ,Nf κb activation ,business ,Oxidative stress - Abstract
Backgroud: Patients with multiple infarct dementia (MID) have subtle deficits that commonly go unnoticed, and are at risk of developing Alzheimer’s disease. Oxidative stress induced by ischaemic injury results in intracellular calcium accumulation and neuronal apoptosis, leading to cognitive impairment by triggering various cellular signal transduction pathways. Several studies have suggested that NF-κB in the presence of p53 has a pro-apoptotic function in various models, but the mechanism is unclear. Aims: The aim of this study was to investigate whether acupuncture could protect cognitive function against cerebral multi-infarction (CMi) induced oxidative stress by inhibiting the activation of NF-κB and its target gene p53. Methods: An animal model of CMi was established by injecting homologous blood emboli into the right internal carotid artery of male Wistar rats. After 2 weeks of acupuncture treatment, cognitive function was detected by novel object recognition. Electron spin resonance and Fluo-3 fuorescence imaging were used to test the generation of ROS and intracellular calcium accumulation, respectively. Expression of NF-κB and p53 was examined by Western blot analysis and immunofluorescence. Results: CMi induced spatial learning and memory impairment, overproduction of intracellular hydroxyl radicals, and elevations of Ca2+, which were ameliorated by verum acupuncture treatment. Acupuncture inhibited activation of NF-κB and its downstream target gene p53. Conclusion: These findings suggest that acupuncture could protect cognitive function against oxidative stress induced by CMi, which is partially associated with suppression of NF-κB-p53 activation.
- Published
- 2019
20. The molluscum contagiosum virus protein MC163 inhibits TNF-α-induced NF-κB activation
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Jessica Cottrell, Joachim Jakob Bugert, Daniel Brian Nichols, Timothy Iversen, William De Martini, and Jesse Coutu
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Molluscum contagiosum virus ,Virology ,Biology ,Nf κb activation ,biology.organism_classification ,Molecular biology - Abstract
Aim: The molluscum contagiosum virus (MCV) expresses several immune evasion molecules that inhibit activation of NF-κB. Presumably, inhibition of inflammatory responses mediated by NF-κB allows MCV to cause persistent infections. Materials & methods: MC163-IKK-α interactions were detected by immunoprecipitations. Results: Here, we identify a novel MCV inhibitor of NF-κB. Ectopic expression of the MC163 protein resulted in a significant decrease in TNF-α-induced NF-κB activation. However, MC163 had no detectable effect on mitochondrial antiviral-signaling protein-induced activation of the IFN-β-promoter. MC163 dampened NF-κB activation induced via the overexpression of either IKK-α or IKK-β suggesting MC163 targets the IKK complex. Conclusion: Our data highlight a previously unknown function for the MC163 protein and may represent an additional strategy used by MCV to subvert host immune responses.
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- 2019
21. Rapamycin Inhibits Nf-ΚB Activation by Autophagy to Reduce Catabolism in Human Chondrocytes
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Aunhua Jin, Yibin Liu, and Xiaojun Li
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Cartilage, Articular ,Inflammation ,Osteoarthritis ,Autophagy-Related Protein 5 ,Mice ,03 medical and health sciences ,Chondrocytes ,0302 clinical medicine ,Cell Line, Tumor ,Autophagy ,medicine ,Animals ,Humans ,RNA, Small Interfering ,Inhibitory effect ,Feedback, Physiological ,Sirolimus ,Catabolism ,Activator (genetics) ,business.industry ,Cartilage ,NF-kappa B ,medicine.disease ,Arthritis, Experimental ,medicine.anatomical_structure ,030220 oncology & carcinogenesis ,Cancer research ,030211 gastroenterology & hepatology ,Surgery ,medicine.symptom ,Nf κb activation ,business ,Signal Transduction - Abstract
Background and Aim: Osteoarthritis is a disease that is accompanied by inflammation and catabolic disorders in the cartilage. Rapamycin is a good autophagy activator and has an inhibitory effect on...
- Published
- 2019
22. Roflumilast, a phosphodiesterase 4 inhibitor, attenuates cadmium-induced renal toxicity via modulation of NF-κB activation and induction of NQO1 in rats
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R I Aloliet, Majid Ahmad Ganaie, Tajdar Husain Khan, Najeeb-Ur-Rehman, Mohammad Nazam Ansari, Faisal Imam, and Abubaker M. Hamad
- Subjects
Cyclopropanes ,Male ,0301 basic medicine ,Health, Toxicology and Mutagenesis ,Aminopyridines ,chemistry.chemical_element ,Pharmacology ,Kidney ,Toxicology ,Nephrotoxicity ,Superoxide dismutase ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Cadmium Chloride ,NAD(P)H Dehydrogenase (Quinone) ,medicine ,Animals ,Urea ,Rats, Wistar ,Roflumilast ,Cadmium ,biology ,Superoxide Dismutase ,NF-kappa B ,Phosphodiesterase ,NF-κB ,General Medicine ,Catalase ,Glutathione ,030104 developmental biology ,chemistry ,Creatinine ,030220 oncology & carcinogenesis ,Benzamides ,Toxicity ,biology.protein ,Kidney Diseases ,Phosphodiesterase 4 Inhibitors ,Nf κb activation ,medicine.drug - Abstract
Objective:In the present study, the protective effect of Roflumilast (ROF, a selective phosphodiesterase (PDE-4) inhibitor) was investigated against cadmium (Cd)-induced nephrotoxicity in rats.Methods:A total of 24 rats were selected and randomly divided into four groups ( n = 6). Group 1 served as the control; groups 2–4 administered with CdCl2(3 mg/kg, i.p.) for 7 days; groups 3 and 4 were co-administered with ROF in doses of 0.5 and 1.5 mg/kg, orally for 7 consecutive days. Nephrotoxicity was evaluated by measuring urine volume, urea and creatinine levels in urine and serum. Oxidative stress was confirmed by measuring malondialdehyde (MDA), glutathione (GSH), superoxide dismutase (SOD), and catalase (CAT) levels in kidney tissue followed by histopathological studies.Results:CdCl2administration results in a significant ( p < 0.01) decrease in urine volume, urea, and creatinine levels in urine, as well as GSH, SOD, and CAT levels in renal tissue. In addition, Cd also produced significantly increased ( p < 0.01) urea and creatinine levels in serum and TBARS levels in renal tissues. Rats treated with ROF significantly ( p < 0.01) restore the altered levels of kidney injury markers, nonenzymatic antioxidant, as well as depleted enzymes in dose-dependent manner. An increased expression of NF-κB p65 and decreased expression of GST and NQO1 in the Cd only treated group were significantly reversed by high dose of ROF (1.5 mg/kg). Histopathological changes were also ameliorated by ROF administration in Cd-treated groups.Conclusion:In conclusion, ROF treatment showed protective effect against renal damage and increased oxidative stress induced by Cd administration.
- Published
- 2019
23. Dietary (−)-epicatechin affects NF-κB activation and NADPH oxidases in the kidney cortex of high-fructose-fed rats
- Author
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Paula D. Prince, Cesar G. Fraga, Monica Galleano, and Cecilia Rodriguez Lanzi
- Subjects
Male ,0301 basic medicine ,medicine.medical_specialty ,Kidney cortex ,Kidney Cortex ,Inflammation ,Fructose ,Catechin ,Rats, Sprague-Dawley ,Ciencias Biológicas ,03 medical and health sciences ,POLYPHENOLS ,INFLAMMATION ,Internal medicine ,NADPH OXIDASE ,medicine ,Animals ,Transcription factor ,030109 nutrition & dietetics ,NADPH oxidase ,biology ,Chemistry ,NF-kappa B ,FLAVONOIDS ,NOX4 ,NOX ,purl.org/becyt/ford/3.1 [https] ,General Medicine ,Bioquímica y Biología Molecular ,FLAVANOL ,Rats ,Toll-Like Receptor 4 ,030104 developmental biology ,Endocrinology ,NADPH Oxidase 4 ,Polyphenol ,NADPH Oxidase 2 ,NADPH Oxidase 1 ,biology.protein ,purl.org/becyt/ford/3 [https] ,NFkappaB ,medicine.symptom ,Signal transduction ,Nf κb activation ,CIENCIAS NATURALES Y EXACTAS ,Signal Transduction ,Food Science - Abstract
Inflammation involves the activation of redox-sensitive transcription factors, e.g., nuclear factor κB (NF-κB). Administration of (−)-epicatechin to high-fructose-fed rats prevented NF-κB activation and up-regulation of the NADPH oxidase 4 (NOX4) in the kidney cortex. These results add mechanistic insights into the action of (−)-epicatechin diminishing inflammatory responses. Fil: Prince, Paula Denise. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Bioquímica y Medicina Molecular. Universidad de Buenos Aires. Facultad Medicina. Instituto de Bioquímica y Medicina Molecular; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Departamento de Química Analítica y Fisicoquímica; Argentina Fil: Rodriguez Lanzi, Maria Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Medicina y Biología Experimental de Cuyo; Argentina. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Departamento de Patología; Argentina Fil: Fraga, César Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Bioquímica y Medicina Molecular. Universidad de Buenos Aires. Facultad Medicina. Instituto de Bioquímica y Medicina Molecular; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Departamento de Química Analítica y Fisicoquímica; Argentina Fil: Galleano, Mónica Liliana. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Bioquímica y Medicina Molecular. Universidad de Buenos Aires. Facultad Medicina. Instituto de Bioquímica y Medicina Molecular; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Departamento de Química Analítica y Fisicoquímica; Argentina
- Published
- 2019
24. Theophylline inhibits cigarette smoke-induced inflammation in skeletal muscle by upregulating HDAC2 expression and decreasing NF-κB activation
- Author
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Qiuli Liang, Jianquan Zhang, Zhiyi He, Yi Liang, Wenlu Zhang, Jing Bai, Ying Xiao, Dongmei Huang, Xiaoning Zhong, Zhiying Ma, and Yan-Fei Bin
- Subjects
Male ,0301 basic medicine ,Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Physiology ,Histone Deacetylase 2 ,Inflammation ,Gene Expression Regulation, Enzymologic ,Cell Line ,Mice ,Pulmonary Disease, Chronic Obstructive ,03 medical and health sciences ,0302 clinical medicine ,Atrophy ,Theophylline ,Physiology (medical) ,Internal medicine ,medicine ,Animals ,Cigarette smoke ,Muscle, Skeletal ,COPD ,Histone deacetylase 2 ,business.industry ,Smoking ,Transcription Factor RelA ,Skeletal muscle ,Cell Biology ,medicine.disease ,Up-Regulation ,030104 developmental biology ,Endocrinology ,medicine.anatomical_structure ,030228 respiratory system ,medicine.symptom ,Nf κb activation ,business ,medicine.drug - Abstract
Inflammation is associated with skeletal muscle dysfunction and atrophy in patients with chronic obstructive pulmonary disease (COPD). Theophylline has an anti-inflammatory role in COPD. However, the effects of theophylline on inflammation in skeletal muscle in COPD have rarely been reported. The aims of this study were to explore whether theophylline has an anti-inflammatory effect on skeletal muscle in a mouse model of emphysema and to investigate the molecular mechanism underlying this effect. In mice, cigarette smoke (CS) exposure for 28 wk resulted in atrophy of the gastrocnemius muscle. Histone deacetylase 2 (HDAC2) and nuclear factor-κBp65 (NF-κBp65) mRNA and protein levels were significantly decreased and increased, respectively, in gastrocnemius muscle. This effect was revered by aminophylline. The exposure of murine skeletal muscle C2C12 cells to CS extract (CSE) significantly increased IL-8 and TNF-α levels as well as NF-κBp65 mRNA and protein levels and NF-κBp65 activity. This effect was reversed by theophylline. HDAC2 knockdown enhanced the activity of NF-κBp65 and increased IL-8 and TNF-α levels in C2C12 cells. CSE significantly increased the interaction of HDAC2 with NF-κBp65 in C2C12 cells. These data suggest that theophylline has an anti-inflammatory effect on skeletal muscle in a mouse model of emphysema by upregulating HDAC2 expression and decreasing NF-κBp65 activation.
- Published
- 2019
25. Galectin-3 is involved in HIV-1 expression through NF-κB activation and associated with Tat in latently infected cells
- Author
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Akemi Hidaka, Mika Okamoto, Masaaki Toyama, and Masanori Baba
- Subjects
Cancer Research ,Galectin 3 ,Galectins ,Biology ,Virus Replication ,Cell Line ,Pathogenesis ,03 medical and health sciences ,chemistry.chemical_compound ,Virology ,Humans ,030304 developmental biology ,0303 health sciences ,Gene knockdown ,030306 microbiology ,NF-kappa B ,Colocalization ,NF-κB ,Blood Proteins ,Molecular biology ,Infectious Diseases ,chemistry ,Galectin-3 ,Host-Pathogen Interactions ,HIV-1 ,Phorbol ,tat Gene Products, Human Immunodeficiency Virus ,Tumor necrosis factor alpha ,Nf κb activation - Abstract
Galectin-3 (Gal-3) is involved in many biological processes and pathogenesis of diseases in part through nuclear factor (NF)-κB activation. We demonstrated that Gal-3 expression was significantly induced by tumor necrosis factor (TNF)-α or phorbol 12-myristate 13-acetate in OM-10.1 and ACH-2 cells, which are considered as a model of HIV-1 latently infected cells. The expression of Gal-3 was also associated with their viral production. However, the induction of Gal-3 by TNF-α was not observed in their uninfected parental cells. Knockdown of Gal-3 resulted in the suppression of NF-κB activation and HIV-1 replication in the latently infected cells. The expression level of Gal-3 was highly correlated with that of HIV-1 Tat in the latently infected cells stimulated with TNF-α. Furthermore, colocalization and possible interaction of Gal-3 and Tat were observed in the stimulated cells. These results suggent that Gal-3 expression is closely correlated with HIV-1 expression in latently infected cells through NF-κB activation and the interaction with Tat.
- Published
- 2019
26. Carnosine Suppresses Human Colorectal Cell Migration and Intravasation by Regulating EMT and MMP Expression
- Author
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Chien-Chun Li, Chih-Chung Wu, Po-Yu Lai, Shu-Ling Hsieh, Shuchen Hsieh, and Jyh-Jye Wang
- Subjects
0301 basic medicine ,Epithelial-Mesenchymal Transition ,Gene Expression ,Carnosine ,Endogeny ,Matrix metalloproteinase ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Antigens, CD ,Cell Movement ,Humans ,Neoplasm Invasiveness ,RNA, Messenger ,Epithelial–mesenchymal transition ,Dipeptide ,Twist-Related Protein 1 ,NF-kappa B ,Intravasation ,Nuclear Proteins ,Cell migration ,General Medicine ,Cadherins ,HCT116 Cells ,Matrix Metalloproteinases ,Cell biology ,030104 developmental biology ,Complementary and alternative medicine ,chemistry ,Depression, Chemical ,030220 oncology & carcinogenesis ,Colorectal Neoplasms ,Nf κb activation - Abstract
Carnosine is an endogenous dipeptide found in the vertebrate skeletal muscles that is usually obtained through the diet. To investigate the mechanism by which carnosine regulates the migration and intravasation of human colorectal cancer (CRC) cells, we used cultured HCT-116 cells as an experimental model in this study. We examined HCT-116 cell migratory and intravasive abilities and expression of epithelial-mesenchymal transition (EMT)-associated molecules and matrix metalloproteinases (MMPs) after carnosine treatment. The results showed that both migration and invasion were inhibited in cells treated with carnosine. We found significant decreases in Twist-1 protein levels and increases in E-cadherin protein levels in HCT-116 cells after carnosine exposure. Although plasminogen activator (uPA) and MMP-9 mRNA and protein levels were decreased, TIMP-1 mRNA and protein levels were increased. Furthermore, the cytosolic levels of phosphorylated I[Formula: see text]B (p-I[Formula: see text]B) and NF-[Formula: see text]B DNA-binding activity were reduced after carnosine treatment. These results indicate that carnosine inhibits the migration and intravasation of human CRC cells. The regulatory mechanism may occur by suppressing NF-[Formula: see text]B activity and modulating MMP and EMT-related gene expression in HCT-116 cells.
- Published
- 2019
27. Inhibition of nuclear thioredoxin aggregation attenuates PM2.5-induced NF-κB activation and pro-inflammatory responses
- Author
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Jingping Sun, Lin Tian, Yan Wang, Zhonghui Zhu, Siling Li, Ximeng Lian, Qiuyue Li, and Xiaowei Chen
- Subjects
0301 basic medicine ,Antioxidant ,medicine.medical_treatment ,Inflammation ,NF-κB ,medicine.disease_cause ,complex mixtures ,Biochemistry ,Proinflammatory cytokine ,Cell biology ,03 medical and health sciences ,chemistry.chemical_compound ,030104 developmental biology ,0302 clinical medicine ,chemistry ,Downregulation and upregulation ,Physiology (medical) ,medicine ,medicine.symptom ,Thioredoxin ,Nf κb activation ,030217 neurology & neurosurgery ,Oxidative stress - Abstract
Exposure to fine particulate matter (PM2.5) can induce oxidative stress and proinflammatory cytokine production, which are central for the induction of PM2.5-mediated adverse effects on public health. Nuclear factor kappa B (NF-κB) signaling is essential for inflammation. The subcellular distribution of thioredoxin (Trx) is related to the activation of NF-κB, but the mechanism involved is unclear. In the current study, we focused on the relationship between the antioxidant Trx and NF-κB in human bronchial epithelial cells (BEAS-2B) after PM2.5 exposure. We inhibited the nuclear translocation of Trx by cHCEU (4-cyclohexyl-[3-(2-chloroethyl)ureido]benzene) and subsequently increased the transcriptional activity of Nrf2 to upregulate the expression of Trx by t-BHQ. Our data suggest that PM2.5 exposure induces the activation of NF-κB and the expression of the downstream proinflammatory cytokines IL-1, IL-6, IL-8 and TNF-α in BEAS-2B cells. CHCEU alleviates inflammatory cytokines by blocking Trx nuclear translocation and inhibits the DNA binding activity of NF-κB. T-BHQ could promote the transcriptional activity of Nrf2 but failed to alleviate the production of inflammatory cytokines. Furthermore, the synergistic effect of t-BHQ and cHCEU on alleviating PM2.5-induced inflammation is more effective than the use of cHCEU alone. Our findings characterize the underlying molecular mechanisms of proinflammatory responses induced by PM2.5 and show that the nuclear translocation and accumulation of Trx in nuclei play important roles in PM2.5-induced NF-κB activation and proinflammatory responses.
- Published
- 2019
28. Involvement of Rho-kinase/IκB-α/NF-κB activation in IL-1β-induced inflammatory response and oxidative stress in human chondrocytes
- Author
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Rukiye Nalan Tiftik, Demet Sinem Guden, İsmail Ün, Meryem Temiz-Resitoglu, Şakir Necat Yılmaz, Gülsen Bayrak, and Seyhan Sahan-Firat
- Subjects
0301 basic medicine ,Physiology ,Inflammatory response ,Interleukin-1beta ,Osteoarthritis ,medicine.disease_cause ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Degenerative disease ,Chondrocytes ,NF-KappaB Inhibitor alpha ,Physiology (medical) ,medicine ,Humans ,Rho-associated protein kinase ,Pharmacology ,rho-Associated Kinases ,Chemistry ,NF-kappa B ,NF-κB ,General Medicine ,medicine.disease ,030104 developmental biology ,030220 oncology & carcinogenesis ,Cancer research ,Nf κb activation ,Oxidative stress - Abstract
It has been clearly indicated that osteoarthritis (OA) is an inflammatory and degenerative disease that could be promoted by Rho-kinase (ROCK); however, little is known about the role of ROCK/inhibitor κB alpha (IκB-α)/nuclear factor-κB (NF-κB) p65 pathway activation in interleukin-1β (IL-1β) induced inflammatory response and oxidative stress in primary human chondrocytes. To test this hypothesis, we focused on determining ROCK-II, IκB-α, p-IκB-α, NF-κB p65, p-NF-κB p65, IL-6, tumor necrosis factor alpha (TNF-α), cyclooxygenase-2 (COX-2), p22phox, and nicotinamide adenine dinucleotide phosphate (NADPH) oxidase subtype 4 (NOX4) protein expression, ROCK-II activity, NADPH oxidase levels, and total antioxidant capacity (TAC) in the presence and absence of ROCK-inhibitor fasudil. IL-1β (2 ng·mL–1, 24 h) increased the expression of ROCK-II, p-IκB-α, NF-κB p65, p-NF-κB p65, IL-6, TNF-α, COX-2, and p22phox proteins, and decreased the expression of IκB-α, and the NOX4 protein level did not alter. ROCK activity and NADPH oxidase levels were increased, whereas the TAC was decreased by IL-1β. Fasudil (10−5–10−7 M) reversed all these changes induced by IL-1β. These results demonstrate that ROCK/IκB-α/NF-κB p65 pathway activation contributes to the IL-1β-induced inflammatory response and oxidative stress, and thus, ROCK inhibition might be a beneficial treatment option for OA patients mainly based on its anti-inflammatory and antioxidant effects.
- Published
- 2021
29. Review for 'Trim14 promotes osteoclastogenesis and noncanonical NF‐κB activation by targeting p100/p52 in chronic periodontitis'
- Author
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Rolando Vernal
- Subjects
business.industry ,medicine ,Cancer research ,medicine.disease ,Nf κb activation ,business ,Chronic periodontitis - Published
- 2021
30. Author response for 'Trim14 promotes osteoclastogenesis and noncanonical NF‐κB activation by targeting p100/p52 in chronic periodontitis'
- Author
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Jiankun Wu, Jianming Wei, Jian Zhang, Yang Sun, and Xiuya Lin
- Subjects
business.industry ,medicine ,Cancer research ,medicine.disease ,business ,Nf κb activation ,Chronic periodontitis - Published
- 2021
31. Mathematical Simulation of Linear Ubiquitination in T Cell Receptor-Mediated NF-κB Activation Pathway
- Author
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Fuminori Tokunaga, Takashi Suzuki, Naoya Hatanaka, and Daisuke Oikawa
- Subjects
CBM complex ,Ubiquitin ,biology ,Chemistry ,T-cell receptor ,Allosteric regulation ,biology.protein ,IκB kinase ,Nf κb activation ,Mathematical simulation ,Cell biology ,Deubiquitinating enzyme - Abstract
The linear ubiquitin chain assembly complex (LUBAC), composed of the HOIP, HOIL-1L, and SHARPIN subunits, activates the canonical nuclear factor-κB (NF-κB) pathway through the Met1 (M1)-linked linear ubiquitination activity. On the course of the T cell receptor (TCR)-mediated NF-κB activation pathway, LUBAC transiently associates with and linearly ubiquitinates the CARMA1-BCL10-MALT1 (CBM) complex. In contrast, the linear ubiquitination of NEMO, a substrate of the TNF-α-induced NF-κB activation pathway, was limited in the TCR pathway. A linear ubiquitin-specific deubiquitinase (DUB), OTULIN, plays a major role in downregulating LUBAC-mediated TCR signaling. Mathematical modeling indicated that linear ubiquitination of the CBM complex accelerates the activation of IκB kinase (IKK), as compared with the activity induced by linear ubiquitination of NEMO alone. Moreover, simulations of the sequential linear ubiquitination of the CBM complex suggested that the allosteric regulation of linear (de)ubiquitination of CBM subunits is controlled by the ubiquitin-linkage lengths. Thus, unlike the TNF-α-induced NF-κB activation pathway, the TCR-mediated NF-κB activation in T cells has a characteristic mechanism to induce LUBAC-mediated NF-κB activation.
- Published
- 2021
32. Etidronate down-regulates Toll-like receptor 2 ligand-induced chemokine production by inhibiting MyD88 expression and NF-κB activation
- Author
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Naohito Yambe, Riyoko Tamai, Izumi Mashima, and Yusuke Kiyoura
- Subjects
0301 basic medicine ,Chemokine ,medicine.medical_treatment ,Immunology ,Down-Regulation ,Gene Expression ,Toxicology ,Ligands ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,medicine ,Immunology and Allergy ,Humans ,Receptor ,Pharmacology ,Toll-like receptor ,biology ,Bone Density Conservation Agents ,Dose-Response Relationship, Drug ,NF-kappa B ,NF-κB ,Etidronic Acid ,General Medicine ,U937 Cells ,Bisphosphonate ,Ligand (biochemistry) ,Toll-Like Receptor 2 ,030104 developmental biology ,chemistry ,030220 oncology & carcinogenesis ,Myeloid Differentiation Factor 88 ,Cancer research ,biology.protein ,Chemokines ,Nf κb activation - Abstract
Pretreatment of J774.1 cells with etidronate, a non-nitrogen-containing bisphosphonate (non-NBP) used as an antibone resorptive drug, was previously reported to inhibit Toll-like receptor (TLR) 2 agonist-induced proinflammatory cytokine production. The present study aimed to examine the effects of etidronate on chemokine production by human monocytic U937 cells incubated with PamU937 cells were pretreated with or without etidronate, and then incubated with or without PamEtidronate down-regulated IL-8 and MCP-1 production and NF-κB p65 activation induced by PamEtidronate down-regulates IL-8 and MCP-1 production in U937 cells by inhibiting both the expression of MyD88 and activation of NF-κB p65 in the TLR2, but not TLR4, pathway.
- Published
- 2020
33. MYC Targeted Rad50 Drives Progression of High-Grade Serous Ovarian Cancer via NF-κB Activation
- Author
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Yinuo Li, Xiyu Zhang, Liu Zhaojian, Yingwei Li, Peng Li, Shourong Wang, Haiya Fang, Beihua Kong, and Yao Liu
- Subjects
enzymes and coenzymes (carbohydrates) ,Text mining ,business.industry ,Rad50 ,Cancer research ,Serous ovarian cancer ,Medicine ,biological phenomena, cell phenomena, and immunity ,Nf κb activation ,business - Abstract
BackgroundRad50 is a component of MRN complex, which consists of Mre11-Rad50-Nbs1. The MRN complex participates in DNA double-strand break repair and DNA-damage checkpoint activation. We sought to investigate the clinical and functional significance of Rad50 in high-grade serous ovarian cancer. MethodsChromatin immunoprecipitation and luciferase assays were performed to evaluate the regulatory roles of MYC on Rad50 expression. Association between Rad50 expression and clinical outcome in HGSOCs was evaluated by Kaplan-Meier analysis. Invasion, clonogenic assay and xenograft mice model were conducted to determine to functional role of Rad50 in ovarian cancer. Protein immunoprecipitation and immunofluorescence were used to explore the underlying mechanisms. ResultsMYC proto-oncogene transcriptionally activated Rad50 expression in high-grade serous ovarian cancer. Next, we provided evidences that Rad50 was frequently upregulated in HGSOCs and enhanced Rad50 expression inversely correlated with patient’s survival. In addition, ectopic expression of Rad50 promoted proliferation/invasion and induced EMT of ovarian cancer cells, whereas knockdown of Rad50 led to decreased aggressive behaviors. Mechanistic investigations revealed that Rad50 induced aggressiveness in HGSOC via activation NF-κB signaling pathway. Moreover, we identified CARD9 as an interacting protein of Rad50 in ovarian cancer cells and activation of NF-κB pathway by Rad50 is CARD9 dependent. ConclusionsOur findings provide evidence that MYC targeted Rad50 exhibits oncogenic property via NF-κB activation in high-grade serous ovarian cancer.
- Published
- 2020
34. IL-33 / ST2 Signaling Promotes TF Expression by Regulating NF-κB Activation in Coronary Artery Endothelial Microparticles of Acute Myocardial Infarction
- Author
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Jing Tao, Hui Cheng, Yujuan Yuan, and Nijiati Muyesai
- Subjects
Interleukin 33 ,medicine.anatomical_structure ,business.industry ,Cancer research ,Medicine ,Myocardial infarction ,business ,medicine.disease ,Nf κb activation ,Artery - Abstract
Background: Interleukin (IL)-33 was previously shown to induce angiogenesis and inflammatory activation of endothelial cells derived Microparticles(EMPs). Tissue factor (TF) plays a central role in hemostasis and thrombosis. Objective: The aim of this study was to investigate the effect of IL-33 on TF release of EMPs, which may be a new link between inflammation and coagulation. Methods: The study analyzed the coronary blood of level of CD31+EMPs, TF protein and IL-33 protein in acute myocardial infarction(AMI) and stable coronary artery disease(SCAD) patients. Human coronary artery endothelial cells (HCAECs) were treated with IL-33 to obtain MPs. The TF activity of EMPs was tested by thermo fisher by adding the TF antibody. Furthermore, TF and TFPI protein were tested by ELISA. Finally, NF-κB inhibitor dimethyl fumarate (DMF) and soluble extracellular domain of ST2 coupled to the Fc fragment of human IgG1 (sST2) were added HCAECs, which were treated with IL-33, then the TF protein level also was tested by ELISA. Results: The AMI patients have higher level of CD31+EMPs, TF protein and IL-33 protein than the SCAD patients in coronary blood. In AMI patients (N=27) , the IL-33 protein positively correlated with CD31+EMPs (r = 0.794, p < 0.01). According to the ROC curve analysis, the areas under the curve (AUC) of CD31+EMPs, TF protein and IL-33 protein were 0.888, 0.962 and 0.778. In the cell culture, the TF activity and TF protein in ECs-derived MPs increased gradually with time of intervention by the treatment of IL-33. IL-33 binding to the ST2 receptor promoted TF expression by regulating NF-κB activation in ECs-derived MPs of HCAECs. Conclusion: Activated endothelial cells and their released MPs simultaneously express TF, which is a risk factor for cardiovascular disease.
- Published
- 2020
35. Andrographolide sulfate inhibited NF-κB activation and alleviated pneumonia induced by poly I:C in mice
- Author
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Jian Cui, Yang Sun, Qiang Xu, Jiao Qu, Ting Fan, Yan Li, Jian Gao, Wenjie Guo, and Wen Liu
- Subjects
0301 basic medicine ,Poly I:C ,Male ,Andrographolide ,medicine.medical_treatment ,Pharmacology ,Mucin 5AC ,NF-κB ,chemistry.chemical_compound ,0302 clinical medicine ,Full Paper ,NF-kappa B ,Mucin-5B ,medicine.anatomical_structure ,Andro-S, andrographolide sulfonate ,Viral pneumonia ,Molecular Medicine ,Cytokines ,TNF-α, Tumor Necrosis Factor-α ,Diterpenes ,Inflammation Mediators ,Nf κb activation ,Injections, Intraperitoneal ,Intraperitoneal injection ,Pneumonia, Viral ,NF-κB, nuclear factor-κB ,03 medical and health sciences ,medicine ,Animals ,IL-6, Interleukin-6 ,I²C ,ARDS, acute respiratory distress syndrome ,Lung ,Sulfonate ,ALI, Acute lung injury ,H&E, hematoxylin & eosin ,Pneumonia ,medicine.disease ,TNBS, trinitro-benzene-sulfonic acid ,respiratory tract diseases ,Mice, Inbred C57BL ,030104 developmental biology ,Poly I-C ,chemistry ,BALF, bron-choalveolar fluid ,030217 neurology & neurosurgery ,Phytotherapy - Abstract
Pneumonia is a common illness that continues to be the major killer of remaining to be a significant source of morbidity and mortality in the patient population. Many microorganisms cause pneumonia, and now concern is turning to the importance of the cause the new therapies for viral pneumonia. In the current study, we report the effect of andrographolide sulfonate, a water-soluble form of andrographolide (trade name: Xi-Yan-Ping Injection), on poly I: C-induced pneumonia. Andrographolide sulfonate was administrated through intraperitoneal injection to mice with poly I: C-induced pneumonia. Recruitment of airway inflammatory cells, alteration of lung histological induced by Poly I: C were significantly ameliorated by andrographolide sulfonate. The protein levels of pro-inflammatory cytokines in bronchoalveolar fluid (BALF) and serum were reduced by andrographolide sulfonate treatment. The levels of MUC5AC and MUC5B in lung tissue were also suppressed. These results reveal that andrographolide sulfate remarkably alleviated pneumonia induced by poly I:C in mice. Moreover, andrographolide sulfonate markedly inhibited the activation of nuclear factor-κB (NF-κB). Taken together, we demonstrated that andrographolide sulfonate ameliorated poly I: C-induced pneumonia in mice, suggesting the possible use of andrographolide sulfonate for virus-induced pneumonia in clinical.
- Published
- 2020
36. Antiviral activity of portulaca oleracea L. extracts against porcine epidemic diarrhea virus by partial suppression on myd88/NF-κb activation in vitro
- Author
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Yang Shifa, Lin Shuqian, Huijun Guo, Jiaqiang Wu, Lu Zhao, Li Guiming, Xie Yunhui, Bin Yin, Zhi Chen, and Liu Yueyue
- Subjects
0301 basic medicine ,Swine ,medicine.medical_treatment ,030106 microbiology ,Portulaca ,Microbiology ,Antiviral Agents ,03 medical and health sciences ,Western blot ,Chlorocebus aethiops ,medicine ,Animals ,Vero Cells ,biology ,medicine.diagnostic_test ,Porcine epidemic diarrhea virus ,NF-kappa B ,biology.organism_classification ,In vitro ,030104 developmental biology ,Infectious Diseases ,Cytokine ,Myeloid Differentiation Factor 88 ,Vero cell ,Signal transduction ,Nf κb activation ,Coronavirus Infections ,Signal Transduction - Abstract
Porcine epidemic diarrhea virus (PEDV), especially variants, causes a highly contagious enteric disease which could give rise to huge economic losses in the swine industry worldwide. Portulaca oleracea L. has been reported to regulate intestine disease and involved in viral infections. However, the underlying mechanisms of Portulaca oleracea L. extracts against PEDV have not been fully elucidated. In this study, the antiviral effects and potential mechanisms of Portulaca oleracea L. extracts against PEDV were investigated in vitro. We first examined the inhibitory effects of different Portulaca oleracea L. extracts on the PEDV(JX-16 strain) in vitro and found that the water extract of Portulaca oleracea L.(PO)could significantly inhibit PEDV replication by 92.73% on VH cells and 63.07% on Vero cells. Furthermore, time-course analysis showed PO inhibited PEDV replication during the adsorption period of infectious cycle. Western blot and indirect immunofluorescence assay indicated that PO down-regulated the S protein expression in a dose-dependent manner. In addition, our results demonstrated the ability of PO to inhibit PEDV replication in VH cells by down-regulating the cytokine levels (TNF-α,IL-22 and IFN-α) and inhibiting the NF-κB signaling pathway activated by PEDV. Thus, Portulaca oleracea L extracts have potential utility in the preventive and therapeutic strategies for PEDV infection.
- Published
- 2020
37. Review for 'Tripartite motif 8 (TRIM8) plays a protective role in a cell model of Parkinson's disease via modulation of NF‐κB activation through targeting of IκBα ubiquitination'
- Author
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Changiz Taghibiglou
- Subjects
IκBα ,Parkinson's disease ,Ubiquitin ,biology ,Tripartite Motif ,Chemistry ,Cell model ,biology.protein ,medicine ,Nf κb activation ,medicine.disease ,Cell biology - Published
- 2020
38. Noxa Mitigates the Development of Emphysema by Inhibiting Cigarette Smoke-Induced NF-κB Activation in Airway Epithelia
- Author
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J.T. Jones, Yohannes Tesfaigzi, Hans Petersen, Dereje D. Tassew, Yohannes A. Mebratu, and S. Fort
- Subjects
business.industry ,Cancer research ,Medicine ,Cigarette smoke ,business ,Airway ,Nf κb activation - Published
- 2020
39. Author response for 'Tripartite motif 8 (TRIM8) plays a protective role in a cell model of Parkinson's disease via modulation of NF‐κB activation through targeting of IκBα ubiquitination'
- Author
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Shaozhi Zhu, Haitao Pei, Yanfei Rong, and Yingqiao Pang
- Subjects
IκBα ,Parkinson's disease ,Tripartite Motif ,Ubiquitin ,biology ,Chemistry ,Cell model ,biology.protein ,medicine ,Nf κb activation ,medicine.disease ,Cell biology - Published
- 2020
40. Bamboo leave extract ameliorated 12-O-tetradecanoylphorbol-13-acetate (TPA) induced ear inflammation by reducing MAP kinase levels and NF-κB activation in mice model
- Author
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Debasish Kumar Dey, Imran Khan, Jai-Heon Lee, and Sun Chul Kang
- Subjects
Male ,Bamboo ,Inflammation ,Plant Science ,Pharmacology ,Acetates ,12-O-Tetradecanoylphorbol-13-acetate ,01 natural sciences ,Biochemistry ,Analytical Chemistry ,chemistry.chemical_compound ,Mice ,Sasa ,medicine ,Animals ,Edema ,Otitis ,Mice, Inbred ICR ,biology ,010405 organic chemistry ,Plant Extracts ,Organic Chemistry ,NF-kappa B ,Coreana ,biology.organism_classification ,0104 chemical sciences ,010404 medicinal & biomolecular chemistry ,chemistry ,Cyclooxygenase 2 ,Mitogen-activated protein kinase ,biology.protein ,Tetradecanoylphorbol Acetate ,sense organs ,medicine.symptom ,Nf κb activation ,Ear edema - Abstract
Sasa coreana Nakai (SCN) is a medicinal plant commonly used against inflammation. However, the underlined mechanisms against skin inflammation is poorly understood. The present study investigated the effects of SCN leave extract on ear inflammation. To this aim, six-week-old male ICR mice was subjected to 12-O-tetradecanoyl-phorbol-13-acetate induce ear edema, which were then topically treated with the leave extract of SCN. Ear thickness, weight, and morphological changes were recorded to ensure the induction of ear edema. Further, histological analysis and protein expression for inflammatory markers were also recorded to validate the study. Topical treatment with SCN repressed TPA-induced ear edema in a dose-dependent manner. Further, SCN treatment significantly antagonized the protein expression of MAP kinase signaling pathway and reduced the effect of TPA-induced NF-κB activation, sequentially, deactivated its transcriptional targets in a dose-dependent manner. Collectively, the study suggested that SCN could be a useful therapeutic agent against skin inflammation.
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- 2020
- Full Text
- View/download PDF
41. NF-κB activation triggers NK-cell stimulation by monocyte-derived dendritic cells
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Naomi C. Bosch, Niels Schaft, Jan Dörrie, Reinhard E. Voll, Barbara Seliger, Gerold Schuler, Stefanie Gross, and Caroline J. Voskens
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interleukin-12 ,lcsh:RC254-282 ,NF-κB ,chemistry.chemical_compound ,Medizinische Fakultät ,Medicine ,Cell stimulation ,adoptive cellular immunotherapy ,dendritic cells ,ddc:610 ,Original Research ,natural killer cells ,Innate immune system ,business.industry ,Monocyte derived ,Cancer ,medicine.disease ,lcsh:Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,Vaccination ,Oncology ,chemistry ,Cancer research ,Interleukin 12 ,business ,Nf κb activation - Abstract
Background: In therapeutic cancer vaccination, monocyte-derived dendritic cells (moDCs) efficiently activate specific T-cell responses; however, optimizing the activation of innate immune cells could support and improve the antitumor effects. A major disadvantage of moDCs matured with the standard cytokine cocktail (consisting of IL-1β, IL-6, TNFα, and PGE2) is their inability to secrete IL-12p70. IL-12 prominently activates natural killer (NK) cells, which are crucial in innate antitumor immunity, as they act as helper cells for the induction of a cytotoxic T lymphocyte (CTL) response and are also able to directly kill the tumor. Methods: Previously we have shown that triggering the NF-κB pathway in moDCs by transfection of mRNA encoding constitutively active IKKβ (caIKKβ) led to IL-12p70 secretion and improved the dendritic cells’ capability to activate and expand CTLs with a memory-like phenotype. In this study, we examined whether such dendritic cells could activate autologous NK cells. Results: moDCs matured with the standard cytokine cocktail followed by transfection with the caIKKβ-RNA were able to activate autologous NK cells, detected by the upregulation of CD54, CD69, and CD25 on the NK cells, their ability to secrete IFNγ, and their high lytic activity. Moreover, the ability of NK-cell activation was not diminished by simultaneous T-cell activation. Conclusion: The capacity of caIKKβ-DCs to activate both the adaptive and innate immune response indicates an enhanced potential for clinical efficacy.
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- 2019
42. Peptidoglycan-dependent NF-κB activation in a small subset of brain octopaminergic neurons controls female oviposition
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Annelise Viallat-Lieutaud, C. Léopold Kurz, Gérard Manière, Émilie Avazeri, Olivier Zugasti, Ambra Masuzzo, Julien Royet, Yael Grosjean, Centre de Recherche des Cordeliers (CRC), Université Paris Diderot - Paris 7 (UPD7)-École pratique des hautes études (EPHE)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre des Sciences du Goût et de l'Alimentation [Dijon] (CSGA), Institut National de la Recherche Agronomique (INRA)-Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Centre National de la Recherche Scientifique (CNRS), Institut de Neurosciences de la Timone (INT), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU), Institut de Biologie du Développement de Marseille (IBDM), Aix Marseille Université (AMU)-Collège de France (CdF)-Centre National de la Recherche Scientifique (CNRS), Centre d'Immunologie de Marseille - Luminy (CIML), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU), Université Pierre et Marie Curie - Paris 6 (UPMC)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Centre National de la Recherche Scientifique (CNRS), 11-LABX-0054/Agence Nationale de la Recherche, Université Pierre et Marie Curie - Paris 6 (UPMC)-École Pratique des Hautes Études (EPHE), Aix Marseille Université (AMU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Kurz, C. Léopold, and Royet, Julien
- Subjects
Oviposition ,[SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology ,barrière comportementale ,peptidoglycan ,neuroscience ,chemistry.chemical_compound ,0302 clinical medicine ,octopamine ,immunologie ,NF-kB ,Biology (General) ,bacteria ,Animal biology ,bactérie ,Neurons ,0303 health sciences ,D. melanogaster ,General Neuroscience ,neurologie ,NF-kappa B ,Brain ,General Medicine ,3. Good health ,Cell biology ,Medicine ,[SDV.IMM]Life Sciences [q-bio]/Immunology ,Drosophila ,Female ,Octopamine (neurotransmitter) ,Nf κb activation ,QH301-705.5 ,Science ,Biology ,drosophila melanogaster ,General Biochemistry, Genetics and Molecular Biology ,03 medical and health sciences ,Calcium imaging ,Biologie animale ,Animals ,030304 developmental biology ,[SDV.GEN]Life Sciences [q-bio]/Genetics ,General Immunology and Microbiology ,Female receptivity ,Neurosciences ,peptidoglycane ,behavioral immunology ,chemistry ,Neurons and Cognition ,Ventral nerve cord ,Peptidoglycan ,Research Advance ,030217 neurology & neurosurgery - Abstract
Indexation en cours. PMCID: PMC6819134; International audience; When facing microbes, animals engage in behaviors that lower the impact of the infection. We previously demonstrated that internal sensing of bacterial peptidoglycan reduces Drosophila female oviposition via NF-kB pathway activation in some neurons (Kurz et al., 2017). Although we showed that the neuromodulator octopamine is implicated, the identity of the involved neurons, as well as the physiological mechanism blocking egg-laying, remained unknown. In this study, we identified few ventral nerve cord and brain octopaminergic neurons expressing an NF-kB pathway component. We functionally demonstrated that NF-kB pathway activation in the brain, but not in the ventral nerve cord octopaminergic neurons, triggers an egg-laying drop in response to infection. Furthermore, we demonstrated via calcium imaging that the activity of these neurons can be directly modulated by peptidoglycan and that these cells do not control other octopamine-dependent behaviors such as female receptivity. This study shows that by sensing peptidoglycan and hence activating NF-kB cascade, a couple of brain neurons modulate a specific octopamine-dependent behavior to adapt female physiology status to their infectious state.
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- 2019
43. Sodium Tanshinone IIA Silate Alleviates High Glucose Induced Barrier Impairment of Human Retinal Pigment Epithelium through the Reduction of NF-κB Activation via the AMPK/p300 Pathway
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Wen-Yu Wu, Ze-Li Guo, Xiang-Chao Yao, Miao-Yan Wu, Qi Guo, Yu Li, Yan-Dong Wang, and Xiao-Wen Liu
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Cell Membrane Permeability ,Sodium ,Blotting, Western ,chemistry.chemical_element ,Retinal Pigment Epithelium ,Pharmacology ,AMP-Activated Protein Kinases ,Cell Line ,Pathogenesis ,03 medical and health sciences ,Cellular and Molecular Neuroscience ,chemistry.chemical_compound ,0302 clinical medicine ,medicine ,Electric Impedance ,Humans ,Phosphorylation ,Fluorescent Antibody Technique, Indirect ,Retinal pigment epithelium ,Cell Membrane ,AMPK ,NF-kappa B p50 Subunit ,NF-κB ,Diabetic retinopathy ,medicine.disease ,Sensory Systems ,Ophthalmology ,medicine.anatomical_structure ,Glucose ,Pyrimidines ,chemistry ,Hyperglycemia ,High glucose ,Abietanes ,030221 ophthalmology & optometry ,Pyrazoles ,sense organs ,Nf κb activation ,E1A-Associated p300 Protein ,030217 neurology & neurosurgery ,Fluorescein-5-isothiocyanate ,Immunosuppressive Agents ,Signal Transduction - Abstract
Purpose: The disruption of retinal pigment epithelium (RPE) barrier may perform a crucial role in the pathogenesis of diabetic retinopathy (DR). AMPK exerts several salutary effects on photorecepto...
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- 2019
44. MALAT1 modulates miR-146’s protection of microvascular endothelial cells against LPS-induced NF-κB activation and inflammatory injury
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Wei-Na Xin, Lin-Lin Feng, and Xiu-Li Tian
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Lipopolysaccharides ,0301 basic medicine ,lcsh:Immunologic diseases. Allergy ,Cell Survival ,Immunology ,inflammatory injury ,Down-Regulation ,Vascular Cell Adhesion Molecule-1 ,Inflammation ,Microbiology ,NF-κB ,Cell Line ,microvascular endothelial cells ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,medicine ,Humans ,MALAT1 ,Molecular Biology ,Interleukin-6 ,Tumor Necrosis Factor-alpha ,Chemistry ,NF-kappa B ,Endothelial Cells ,Original Articles ,Cell Biology ,Intercellular Adhesion Molecule-1 ,miR-146 ,Up-Regulation ,MicroRNAs ,030104 developmental biology ,Infectious Diseases ,030220 oncology & carcinogenesis ,Cancer research ,RNA, Long Noncoding ,Inflammation Mediators ,medicine.symptom ,E-Selectin ,Nf κb activation ,lcsh:RC581-607 ,Signal Transduction - Abstract
To investigate the role of miR-146 and its possible relationship with MALAT1 in LPS-induced inflammation in human microvascular endothelial cells (HMECs), HMEC-1 cells were treated with LPS to construct an inflammatory injury cell model, and the cell viability, TNF-α and IL-6 secretion and the expression levels of VCAM-1, SELE and ICAM-1 were analysed as markers of inflammatory injury. The regulation mechanisms of miR-146 interacted with MALAT1 and the downstream NF-κB signalling were also verified by dual-luciferase assay and knockdown technology. LPS significantly decreased the cell viability, increased levels of VCAM-1, SELE and ICAM-1 and also up-regulated miR-146a/b, TNF-α and IL-6 in a dose-dependent manner. Over-expression of miR-146a resulted in down-regulation of TNF-α and IL-6, as well as VCAM-1, SELE and ICAM-1, while inhibition of miR-146a led to opposite results. The dual-luciferase reporter assay showed both miR-146a and miR-146b directly targeted and negatively regulated the expression of MALAT1. Silencing of MALAT1 suppressed LPS-induced NF-κB activation and TNF-α and IL-6 secretion, reducing the cell inflammatory injury, but these changes were reversed after combined treatment with miR-146a inhibitor. Taken together, we demonstrate that miR-146 protects HMECs against inflammatory injury by inhibiting NF-κB activation. This process is modulated by MALAT1.
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- 2019
45. Taurochenodeoxycholic Acid Suppresses NF-κB Activation and Related Cytokines Expression in Peritoneal Macrophages from Adjuvant Arthritis Rat
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Wei Mao, Jinshan Cao, Mingqiang Liu, Guan Hong, Bo Liu, Li Peifeng, Caiyun Wang, and He Xiuling
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0301 basic medicine ,Pharmacology ,Taurochenodeoxycholic acid ,Chemistry ,nuclear factor-kappa B ,Organic Chemistry ,Plant Science ,cytokines ,adjuvant arthritis ,lcsh:QK1-989 ,lcsh:Chemistry ,lcsh:QD241-441 ,03 medical and health sciences ,chemistry.chemical_compound ,030104 developmental biology ,lcsh:QD1-999 ,lcsh:Organic chemistry ,lcsh:Botany ,Drug Discovery ,Cancer research ,peritoneal macrophages ,Adjuvant arthritis ,Nf κb activation - Abstract
Taurochenodeoxycholic acid (TCDCA) is one of main bioactive substances of animals’ bile acid and confers good anti-inflammatory activity. This study aimed to investigate the mechanism of the anti-adjuvant arthritis activity of TCDCA, the actions were observed in vitro on the protein and mRNA expression of cytokines, the activity of nuclear factor-kappa B (NF-κB) and its inhibitory IκBα protein level of peritoneal macrophages (PMs) in adjuvant arthritis (AA) rats. In a definite concentration ranging from 150 μg/mL to 200 μg/mL, the over protein and mRNA expression of TNF-α, IL-1β and IL-6 were remarkably suppressed in the supernatant of PMs treatment with TCDCA. Positive correlations were found between changes of NF-κB activity and expression of TNF-α, IL-1β and IL-6 influenced by TCDCA. The activity of NF-κB was markedly inhibited and IκBα protein level was increased by TCDCA (150 μg/mL,180 μg/mL and 200 μg/mL). TCDCA suppresses the protein and mRNA expression of TNF-α, IL-1β, and IL-6 by inhibiting the NF-κB binding activity, which is mediated through up-regulating the IκBα expression of PMs in AA rats.
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- 2018
46. Phosphatidylcholine regulates NF-κB activation in attenuation of LPS-induced inflammation: evidence from in vitro study
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Meijuan Chen, Mingshan Wang, Yicheng Huang, Hongying Pan, Yongxi Tong, Yining Dai, Hai-Jun Huang, and Jia-Jie Zhang
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0301 basic medicine ,Antioxidant ,p65 nuclear translocation ,medicine.medical_treatment ,Inflammation ,Pharmacology ,Inflammatory bowel disease ,General Biochemistry, Genetics and Molecular Biology ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Phosphatidylcholine ,medicine ,In vitro study ,lcsh:QH301-705.5 ,lcsh:R5-920 ,tTNF-ɑ secretion and activation ,Chemistry ,LPS-induced injury ,medicine.disease ,030104 developmental biology ,MAPKs signal pathway ,lcsh:Biology (General) ,030220 oncology & carcinogenesis ,Animal Science and Zoology ,medicine.symptom ,Nf κb activation ,lcsh:Medicine (General) - Abstract
Phosphatidylcholine (PC) has been demonstrated as anti-inflammatory and antioxidant/pro-oxidant molecules. In this study, we investigated the protective effects of PC on inflammatory bowel disease (IBD) caused by lipopolysaccharide (LPS)-induced injury in intestinal epithelia cells. The IEC-6 cells (intestinal epithelia cells) were stimulated with LPS (1 μg/mL) for 24 h with or without PC pretreatment, in the next steps: (1) the level of the inflammatory cytokine tumor necrosis factor (TNF)-α was measured with ELISA; (2) the nuclear translocation and phosphorylation of NF-κB was investigated with Western blot, EMSA, immunofluorence assay; (3) the protein phosporylation levels in MAPK signaling pathway were detected with Western blot method. The results showed: (1) compared with the normal group, 10 and 20 μg/mL of PC significantly inhibited the production and activation of TNF-α, (P
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- 2018
47. Lactobacillus plantarum C29 alleviates NF-κB activation and Th17/Treg imbalance in mice with TNBS-induced colitis
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Myung Joo Han, Hae-Ji Lee, Se-Eun Jang, Dong-Hyun Kim, and Jin-Ju Jeong
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0301 basic medicine ,Th17 treg ,colitis ,Agriculture (General) ,Immunology ,chemical and pharmacologic phenomena ,S1-972 ,03 medical and health sciences ,medicine ,Colitis ,Tnbs colitis ,biology ,Chemistry ,food and beverages ,hemic and immune systems ,RC581-607 ,biology.organism_classification ,medicine.disease ,lactobacillus plantarum ,t cell differentiation ,030104 developmental biology ,T cell differentiation ,Cancer research ,Immunologic diseases. Allergy ,Nf κb activation ,Agronomy and Crop Science ,Lactobacillus plantarum ,Food Science - Abstract
In this study, we examined whether Lactobacillus plantarum C29 could restore 2,4,6-trinitrobenzenesulfonic acid (TNBS)-induced T helper 17 (Th17)/regulatory T cells (Tregs) imbalance in mice. Treatment with C29 inhibited the differentiation of splenic T cells into Th17 cells and the expression of retinoic acid receptor-related orphan receptor gamma t (RORγt) and IL-17 in vitro, whereas promoting the differentiation into Tregs. Oral administration of Lactobacillus plantarum C29 in mice attenuated TNBS-induced colon shortening, myeloperoxidase (MPO) activity, inducible Nitric oxide (NO) synthase, and cyclooxygenase-2 expression, and activation of NF-κB in the colon of mice. C29 treatment downregulated TNF-α, IL-17, and IL-1β expression, while increasing IL-10 expression. C29 treatment suppressed TNBS-induced Th17 cell differentiation and reduced IL-17 and RORγt expression, while promoting the TNBS-suppressed Tregs differentiation and IL-10 and forkhead box P3 expression. These findings suggest that C29 can alleviate colitis by modulating NF-κB activation as well as Th17/Treg balance.
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- 2018
48. COVID-19 and Metabolic Syndrome: NF-κB Activation. Crossroads
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Margarita Rodríguez-López, Daniel Carnevali-Ruiz, Iris Mercedes de-Luna-Boquera, Pablo Guisado-Vasco, and Marta Cano-Megías
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arterial hypertension ,2019-20 coronavirus outbreak ,Letter ,Coronavirus disease 2019 (COVID-19) ,Endocrinology, Diabetes and Metabolism ,Pneumonia, Viral ,Diabetes Complications ,Endocrinology ,Insulin resistance ,severe pneumonia ,Diabetes mellitus ,Humans ,Medicine ,Obesity ,Pandemics ,Inflammation ,Metabolic Syndrome ,business.industry ,hyperinflammation state ,NF-kappa B ,COVID-19 ,medicine.disease ,NF-κB activation ,diabetes mellitus ,Immunology ,Insulin Resistance ,Signal transduction ,Metabolic syndrome ,Coronavirus Infections ,business ,Nf κb activation ,Signal Transduction - Published
- 2020
49. Sa450 SODIUM FERULATE AMELIORATES ACETIC ACID-INDUCED ACUTE COLITIS VIA INHIBITING NLRP3 INFLAMMASOME AND NF-κB ACTIVATION IN MICE
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Lei Sha and Juan Zhu
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chemistry.chemical_compound ,Acetic acid ,Hepatology ,Chemistry ,Gastroenterology ,medicine ,Inflammasome ,Pharmacology ,Nf κb activation ,Sodium ferulate ,Acute colitis ,medicine.drug - Published
- 2021
50. Monoterpene derivatives from the flowers of the Hemerocallis minor Mill
- Author
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Wei-Dong Zhang, Yu Zhang, Yigong Guo, Hui-Zi Jin, Shi-Kai Yan, Xin-Cai Zhao, and Yang-Guo Xie
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biology ,010405 organic chemistry ,Chemistry ,Stereochemistry ,Monoterpene ,Plant Science ,biology.organism_classification ,01 natural sciences ,Biochemistry ,0104 chemical sciences ,HeLa ,010404 medicinal & biomolecular chemistry ,Phenol derivative ,Nf κb activation ,Agronomy and Crop Science ,IC50 ,Two-dimensional nuclear magnetic resonance spectroscopy ,Biotechnology - Abstract
Three new monoterpene derivatives, named hemerolides A–C (1–3), one new phenol derivative hemeratrol A (4), along with thirteen known compounds (5–17) were isolated from the flowers of Hemerocallis minor Mill. The structures of the isolated compounds were determined by a combination of 1D and 2D NMR, HRESIMS, and CD spectroscopic data. All the isolates were evaluated their inhibitory activity against NF-κB activation in HeLa cells. Among them, compound 4 displayed a moderate inhibition of NF-κB activation with IC50 value of 41.7 μM.
- Published
- 2017
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