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Nuclear Factor Kappa B

Restituto Tocmo, Kirk Parkin
The Allium vegetable-derived metabolite, S-alk(en)ylmercaptocysteine (CySSR), has been reported to modulate oxidative stress and inflammatory responses. However, the underlying mechanisms of action and structure-activity relationships are not completely understood. We investigated the mechanistic basis of the protective effects of CySSR on pro-inflammatory responses involving redox/oxidative stress induced by E. coli lipopolysaccharide (LPS) using RAW 264.7 cells. CySSR (R = allyl, "A" or 1-propenyl, "Pe") pre-treatments conferred concentration-dependent reductions in cytokines (TNF-α, IL-1β and IL-6), NO production and iNOS (inducible nitric synthase) overexpression, and attenuated oxidant production in LPS-stimulated RAW 264...
October 17, 2018: Free Radical Biology & Medicine
Zheng-Shun Wen, Zhen Tang, Li-Xia Gu, Xing-Wei Xiang, You-Le Qu
Low molecular-weight seleno-aminopolysaccharides (LSA) have been shown to possess a variety of biological activities in vitro. In the present study, we further investigated the immunomodulatory effect of LSA on immunosuppressive mice induced by cyclophosphamide (CPA) and its molecular mechanism. The results demonstrated that LSA could significantly increase spleen and thymus indices, proliferation of splenic lymphocyte, the secretion of cytokines (IL-2, IL-4, IL-10 and INF-γ) of serum and ileum, and secretory immunoglobulin A (sIgA) content of small intestine...
October 17, 2018: International Journal of Biological Macromolecules
Dandan Wang, Lingling Lao, Xiaohong Pang, Qian Qiao, Lijun Pang, Zhongwen Feng, Facheng Bai, Xuemei Sun, Xing Lin, Jinbin Wei
Endoplasmic reticulum stress (ERS) is induced by accumulation of misfolded proteins, playing a pivotal role during the processes of non-alcoholic fatty liver disease (NAFLD). The present study was to investigate the effect of Asiatic acid from Potentilla chinensis (AAPC) on liver cell lipid metabolism, exploring the underlying mechanism of AAPC against NAFLD. In vivo, the animal NAFLD model was induced by feeding rats with high fat diet (HFD) for 18 weeks, and meanwhile the rats were treated with AAPC from weeks 8 to 18; In vitro experiment, the effect of AAPC on dyslipidemia induced by oleic acid (OA) in hepatic cells (HepG2) was evaluated...
October 16, 2018: International Immunopharmacology
Chen Huang, Lin Feng, Wei-Dan Jiang, Pei Wu, Yang Liu, Yun-Yun Zeng, Jun Jiang, Sheng-Yao Kuang, Ling Tang, Xiao-Qiu Zhou
Deoxynivalenol (DON) is one of the most common mycotoxins in animal feed worldwide and causes significant threats to the animal production. The intestine is an important mucosal immune organ in teleost, and it is also the first target for feed-borne toxicants in animal. However, studies concerning the effect of DON on fish intestine are scarce. This study explored the effects of DON on intestinal immune function in juvenile grass carp (Ctenopharyngodon idella). A total of 1440 juvenile grass carp (12.17 ± 0...
October 16, 2018: Fish & Shellfish Immunology
Mythily Srinivasan, Niloy Lahiri, Anish Thyagarajan, Emily Witek, Debra Hickman, Debomoy K Lahiri
Introduction: Glucocorticoid-induced leucine zipper is a regulatory protein that sequesters activated nuclear factor-kappa B p65. Previously, we showed that rationally designed analogs of the p65-binding domain of glucocorticoid-induced leucine zipper, referred to as glucocorticoid-induced leucine zipper analogs (GAs), inhibited amyloid β-induced metabolic activity and inflammatory cytokines in mixed brain cell cultures. Here, we investigate the therapeutic efficacy of GA in an Alzheimer's disease model...
2018: Alzheimer's & Dementia: Translational Research & Clinical Interventions
Luyao Xu, Benson O A Botchway, Songou Zhang, Jingying Zhou, Xuehong Liu
Spinal cord injury (SCI) can have a significant impact on an individual's life. Herein, we discuss how resveratrol improves SCI by inhibiting nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) signaling pathway. Evidences show resveratrol suppresses NF-κB signaling pathway to exert its beneficial effects on various diseases. NF-κB signaling pathway plays a significant role in the pathophysiological mechanisms of SCI including increase in inflammation, augmentation of damage caused by free radicals and lipid peroxidation as well as facilitation of apoptosis and axonal demyelination...
2018: Frontiers in Neuroscience
Hiroshi Sugano, Yoshihiro Shirai, Takashi Horiuchi, Nobuhiro Saito, Yohta Shimada, Ken Eto, Tadashi Uwagawa, Toya Ohashi, Katsuhiko Yanaga
Neoadjuvant chemoradiotherapy followed by radical surgery is the standard treatment for patients with locally advanced low rectal cancer. However, several studies have reported that ionizing radiation (IR) activates nuclear factor kappa B (NF-κB) that causes radioresistance and induces matrix metalloproteinase (MMP)-2/-9, which promote tumor migration and invasion. Nafamostat mesilate (FUT175), a synthetic serine protease inhibitor, enhances the chemosensitivity to cytotoxic agents in digestive system cancer cells by inhibiting NF-κB activation...
October 17, 2018: Cancers
Larissa Staurengo-Ferrari, Kenji W Ruiz-Miyazawa, Felipe A Pinho-Ribeiro, Victor Fattori, Tiago H Zaninelli, Stephanie Badaro-Garcia, Sergio M Borghi, Thacyana T Carvalho, Jose C Alves-Filho, Thiago M Cunha, Fernando Q Cunha, Rubia Casagrande, Waldiceu A Verri
Gouty arthritis is characterized by an intense inflammatory response to monosodium urate crystals (MSU), which induces severe pain and reduction in the life quality of patients. Trans -Chalcone (1,3-diphenyl-2-propen-1-one) is a flavonoid precursor presenting biological activities such as anti-inflammatory and antioxidant proprieties. Thus, the aim of this work was to evaluate the protective effects of trans -Chalcone in experimental gout arthritis in mice. Mice were treated with trans -Chalcone (3, 10, or 30 mg/kg, per oral) or vehicle (Tween 80 20% plus saline) 30 min before intra-articular injection of MSU (100 μg/knee joint, intra-articular)...
2018: Frontiers in Pharmacology
Hiroki Yoshioka, Tsunemasa Nonogaki, Hiroyuki Ohnishi, Nobuyuki Fukuishi, Masae Yoshikawa, Ming-Yu Gui, Yong-Ri Jin, Xu-Wen Li, Yoshiyuki Adachi, Naohito Ohno, Koichi Takeya, Yukio Hitotsuyanagi, Nobuhiko Miura, Yutaka Aoyagi
The present study aimed to investigate the protective effects of kamebakaurin (KA) and 1O, 20O-diacetyl kamebakaurin (Ac2 KA) on acetaminophen (APAP)-induced hepatotoxicity and compare the hepatoprotective mechanisms of the two chemicals. Seven-week-old male C57BL/6J mice were orally administered KA, Ac2 KA, or an ethanol/olive oil emulsion once per day for 7-days. Twenty-four hours after the final administration, the mice were fasted and then intraperitoneally injected with 450 mg/kg APAP or saline. At 16 h after injection, the mice were euthanized and blood samples were collected for plasma analysis...
2018: Biomedical Research
Yan-Ping Huang, Tao-Bin He, Xian-Dan Cuan, Xuan-Jun Wang, Jiang-Miao Hu, Jun Sheng
2,3- O -acetylated-1,4- β -d-glucomannan (DOP-1-1) is a polysaccharide isolated from the stem of Dendrobium officinale . DOP-1-1 has been demonstrated to have remarkable immunomodulatory properties, but little is known about the influence of its structural diversity on bioactivity (and even less about the exact mechanism underlying its immune responses). First, DOP-1-1 was stabilized at different temperatures and pH conditions based on differential scanning calorimetry and size exclusion-chromatography⁻high-performance liquid chromatography...
October 16, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Rafaella Almeida Lima Nunes, Mirian Galliote Morale, Gabriela Ávila Fernandes Silva, Luisa Lina Villa, Lara Termini
Most human papillomavirus infections are readily cleared by the host immune response. However, in some individuals, human papillomavirus can establish a persistent infection. The persistence of high-risk human papillomavirus infection is the major risk factor for cervical cancer development. These viruses have developed mechanisms to evade the host immune system, which is an important step in persistence and, ultimately, in tumor development. Several cell types, receptors, transcription factors and inflammatory mediators involved in the antiviral immune response are viral targets and contribute to tumorigenesis...
October 11, 2018: Clinics
Yan-hui Bai, Yong Lv, Wei-qun Wang, Guang-li Sun, Hao-hao Zhang
Human corneal fibroblasts (HCFs) are implicated in corneal neovascularization (CRNV). The mechanisms underlying the inflammatory response in HCFs and the development of CRNV were explored in this study. Alkali burns were applied to the corneas of rats to establish a CRNV model. The expression of long noncoding RNA (lncRNA) nuclear enriched abundant transcript 1 (NEAT1) and mRNA and protein levels of nuclear factor kappa B (NF-κB)- activating protein (NKAP) were examined by quantitative real-time (qRT-PCR) and Western blot methods, respectively...
October 15, 2018: Journal of Molecular Endocrinology
Aran Son, Namju Kang, Ki Woo Kim, Yu-Mi Yang, Dong Min Shin
Mechanical stress plays an important role in the regulation of bone turnover. However, the mechanism underlying hypo-osmotic stress-induced cellular response in osteoblasts remains poorly understood. In this study, we investigated the effect of hypotonic stress on the expression of bone remodeling factors, including the receptor activator of nuclear factor-kappa B ligand (RANKL) and the nuclear factor of activated T cells type c1 (NFATc1) in primary mouse osteoblasts and MC3T3-E1 cells. Hypo-osmotic stress induced significant increases in RANKL mRNA expression and intracellular Ca2+ concentration ([Ca2+]i) from the extracellular space...
October 15, 2018: Journal of Molecular Endocrinology
Yang Yang, Ling Li, Qiyun Hang, Yuan Fang, Xiaoliang Dong, Peng Cao, Zhimin Yin, Lan Luo
Sepsis is a life-threatening organ dysfunction caused by dysregulated host response to infection and characterized by redox imbalance and severe oxidative stress. Glutathione (GSH) serves several vital functions, including scavenging free radicals and maintaining intracellular redox balance. Extracellular GSH is unable to be taken into the majority of human cells, and the GSH prodrug N-acetyl-l-cysteine (NAC) does not exhibit promising clinical effects. γ-glutamylcysteine (γ-GC), an intermediate dipeptide of the GSH-synthesis pathway and harboring anti-inflammatory properties, represents a relatively unexplored option for sepsis treatment...
September 26, 2018: Redox Biology
Junyoung Park, Sun-Hyung Ha, Fukushi Abekura, Hakseong Lim, Young-Chae Chang, Moon-Jo Lee, Miri Lee, Young-Choon Lee, Cheorl-Ho Kim
In our previous studies, structurally similar compounds of ascochlorin and ascofuranone exhibited anti-inflammatory activity. Neural inflammation plays a significant role in the commence and advancement of neurodegenerative diseases. It is not known whether 4-O-carboxymethylascochlorin (AS-6) regulates the initial stage of inflammatory responses at the cellular level in BV2 microglia cells. We here investigated the anti-inflammatory effects of AS-6 treatment in microglia cells with the microglial protection in neurons...
October 15, 2018: Journal of Cellular Biochemistry
Tawfik Addi, Stéphane Poitevin, Nathalie McKay, Kamel Eddine El Mecherfi, Omar Kheroua, Noémie Jourde-Chiche, Alix de Macedo, Bertrand Gondouin, Claire Cerini, Philippe Brunet, Françoise Dignat-George, Stéphane Burtey, Laetitia Dou
Chronic kidney disease (CKD) is associated with high risk of thrombosis. Indole-3 acetic acid (IAA), an indolic uremic toxin, induces the expression of tissue factor (TF) in human umbilical vein endothelial cells (HUVEC) via the transcription factor aryl hydrocarbon receptor (AhR). This study aimed to understand the signaling pathways involved in AhR-mediated TF induction by IAA. We incubated human endothelial cells with IAA at 50 µM, the maximal concentration found in patients with CKD. IAA induced TF expression in different types of human endothelial cells: umbilical vein (HUVEC), aortic (HAoEC), and cardiac-derived microvascular (HMVEC-C)...
October 15, 2018: Archives of Toxicology
Jing Shen, Xin Sun, Bo Pan, Shoubo Cao, Jingyan Cao, Dehai Che, Fang Liu, Shuai Zhang, Yan Yu
Background: Tumor-associated macrophage (TAM) is emerging as one of the important complications in cancer promotion. Interleukin-17 (IL-17), a potent pro-inflammatory cytokine, plays an active role in promoting M2 macrophage differentiation (TAMs are M2-like phenotypes). In this study, we aimed to evaluate that IL-17 stimulates key phenotypic and functional signatures of M2 macrophages associated with cancer progression in non-small-cell lung cancer (NSCLC) patients. Patients and methods: The markers and cytokines of M2 macrophages were detected in THP-1-derived macrophages and mouse peritoneal macrophages treated with IL-17...
2018: Cancer Management and Research
Hiroki Yoshioka, Tsunemasa Nonogaki, Shiori Fukaya, Yoshimi Ichimaru, Akito Nagatsu, Masae Yoshikawa, Hirohisa Fujii, Makoto Nakao
BACKGROUND: The current study aimed to investigate the hepatoprotective effects of Sasa veitchii extract (SE) on carbon tetrachloride (CCl4 )-induced liver fibrosis in mice. METHODS: Male C57BL/6J mice were intraperitoneally injected with CCl4 dissolved in olive oil (1 g/kg) twice per week for 8 weeks. SE (0.1 mL) was administered orally once per day throughout the study, and body weight was measured weekly. Seventy-two hours after the final CCl4 injection, mice were euthanized and plasma samples were collected...
October 15, 2018: Environmental Health and Preventive Medicine
Li Wang, Xinyuan Qiao, Sijia Zhang, Yue Qin, Tiantian Guo, Zhenye Hao, Li Sun, Xiaona Wang, Yanan Wang, Yanping Jiang, Lijie Tang, Yigang Xu, Yijing Li
Transmissible gastroenteritis virus (TGEV) infection causes acute enteritis in swine of all ages, and especially in suckling piglets. Small intestinal inflammation is considered a central event in the pathogenesis of TGEV infections, and nuclear factor-kappa B (NF-κB) is a key transcription factor in the inflammatory response. However, it is unclear whether NF-κB is crucial for inducing inflammation during a TGEV infection. Our results show that NF-κB was activated in swine testicular (ST) cells and intestinal epithelial cell lines J2 (IPEC-J2) cells infected with TGEV, which is consistent with the up-regulation of pro-inflammatory cytokines...
October 15, 2018: Virulence
Can Zhao, Jing Jiang, Yong-Liang Wang, Yong-Quan Wu
Ischemic heart disease is widely considered as a major health threat, which causes a high number of deaths every year worldwide. Much evidence has shown that oxidative stress (OS) is implicated in the pathogenesis of ischemia-reperfusion injury (IRI). This study aims to evaluate the effect of miR-590-3p on the OS of IRI mice through the nuclear factor kappa-B (NF-κB) signaling pathway by targeting receptor-interacting protein kinase 1 (RIPK1). IRI mouse models were established for extracting myocardial tissues and isolating myocardial cells...
October 15, 2018: Journal of Cellular Biochemistry
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