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https://www.readbyqxmd.com/read/29667734/celastrol-reverses-palmitic-acid-pa-caused-tlr4-md2-activation-dependent-insulin-resistance-via-disrupting-md2-related-cellular-binding-to-pa
#1
Xue Zhang, Ying Wang, Hui-Ya Ge, Yi-Jun Gu, Fan-Fan Cao, Chun-Xin Yang, Georges Uzan, Bin Peng, Deng-Hai Zhang
Elevated plasma statured fatty acids (FFAs) cause TLR4/MD2 activation-dependent inflammation and insulin tolerance, which account for the occurrence and development of obesity. It has been confirmed that statured palmitic acid (PA) (the most abundant FFA) could bind MD2 to cause cellular inflammation. The natural compound celastrol could improve obesity, which is suggested via inhibiting inflammation, yet the detailed mechanism for celastrol is still unclear. As celastrol is reported to directly target MD2, we thought disrupting the binding between FFAs and MD2 might be one of the ways for celastrol to inhibit FFAs-caused inflammation and insulin resistance...
April 18, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29667667/%C3%AE-cyperone-inhibits-lps-induced-inflammation-in-bv-2-cells-through-activation-of-akt-nrf2-ho-1-and-suppression-of-the-nf-%C3%AE%C2%BAb-pathway
#2
Bingxu Huang, Dewei He, Guangxin Chen, Xin Ran, Wenjin Guo, Xingchi Kan, Wei Wang, Dianfeng Liu, Shoupeng Fu, Juxiong Liu
Accumulating evidence has shown that activated microglia cause inflammatory immune response, which could lead to neurodegenerative diseases such as Parkinson's disease and Alzheimer's disease. α-Cyperone, one of the main ingredients of Cyperus rotundus oil, has been reported to possess anti-inflammatory activity in activated macrophages. In this study, we found that α-cyperone markedly decreased the production of tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6) and interleukin-1β (IL-1β) in LPS-induced BV-2 cells...
April 18, 2018: Food & Function
https://www.readbyqxmd.com/read/29667579/intracellular-antibody-signalling-is-regulated-by-phosphorylation-of-the-fc-receptor-trim21
#3
Claire Dickson, Adam J Fletcher, Marina Vaysburd, Ji-Chun Yang, Donna L Mallery, Jingwei Zeng, Christopher M Johnson, Stephen H McLaughlin, Mark Skehel, Sarah Maslen, James Cruickshank, Nicolas Huguenin-Dezot, Jason W Chin, David Neuhaus, Leo C James
Cell surface Fc receptors activate inflammation and are tightly controlled to prevent autoimmunity. Antibodies also simulate potent immune signalling from inside the cell via the cytosolic antibody receptor TRIM21, but how this is regulated is unknown. Here we show that TRIM21 signalling is constitutively repressed by its B-Box domain and activated by phosphorylation. The B-Box occupies an E2 binding site on the catalytic RING domain by mimicking E2-E3 interactions, inhibiting TRIM21 ubiquitination and preventing immune activation...
April 18, 2018: ELife
https://www.readbyqxmd.com/read/29667303/mir-146a-regulates-pm-1-induced-inflammation-via-nf-%C3%AE%C2%BAb-signaling-pathway-in-beas-2b-cells
#4
Limin Liu, Chong Wan, Wei Zhang, Longfei Guan, Guoxiong Tian, Fang Zhang, Wenjun Ding
Exposure to particulate matter (PM) leads to kinds of cardiopulmonary diseases, such as asthma, COPD, arrhythmias, lung cancer, etc., which are related to PM-induced inflammation. We have found that PM2.5 (aerodynamics diameter <2.5 µm) exposure induces inflammatory response both in vivo and in vitro. Since the toxicity of PM is tightly associated with its size and components, PM1 (aerodynamics diameter <1.0 µm) is supposed to be more toxic than PM2.5 . However, the mechanism of PM1 -induced inflammation is not clear...
April 18, 2018: Environmental Toxicology
https://www.readbyqxmd.com/read/29666854/casein-glycomacropeptide-hydrolysates-inhibit-pge2-production-and-cox2-expression-in-lps-stimulated-raw-264-7-macrophage-cells-via-akt-mediated-nf-%C3%AE%C2%BAb-and-mapk-pathways
#5
Tiange Li, Dongxiao Gao, Min Du, Xue Cheng, Xueying Mao
A casein glycomacropeptide hydrolysate (GMPH) was found to possess inhibitory activity against lipopolysaccharide (LPS)-induced inflammatory response in our previous study. In the current study, the inhibitory effect and the underlying molecular mechanism of GMPH on inflammatory response in LPS-stimulated RAW264.7 macrophages were further investigated. Results showed that GMPH significantly suppressed LPS-induced intracellular reactive oxygen species (ROS) and malondialdehyde (MDA) production. GMPH reduced the production of prostaglandin E2 (PEG2) and the expression of cyclooxygenase-2 (COX-2) and cytosolic phospholipase A2 (cPLA2) in LPS-stimulated macrophages...
April 18, 2018: Food & Function
https://www.readbyqxmd.com/read/29666475/lincrna-cox2-regulates-nlrp3-inflammasome-and-autophagy-mediated-neuroinflammation
#6
Zhenyi Xue, Zimu Zhang, Hongkun Liu, Wen Li, Xiangdong Guo, Zhihui Zhang, Ying Liu, Long Jia, Yan Li, Yinghui Ren, Hongwei Yang, Lijuan Zhang, Qi Zhang, Yurong Da, Junwei Hao, Zhi Yao, Rongxin Zhang
Inflammasome activation plays key roles in host defense, but also contributes to the pathogenesis of auto-inflammatory, and neurodegenerative diseases. As autophagy is connected with both the innate and adaptive immune systems, autophagic dysfunction is also closely related to inflammation, infection, and neurodegeneration. Here we identify that lincRNA-Cox2, previously known as a mediator of both the activation and repression of immune genes expression in innate immune cells, could bind NF-κB p65 and promote its nuclear translocation and transcription, modulating the expression of inflammasome sensor NLRP3 and adaptor ASC...
April 17, 2018: Cell Death and Differentiation
https://www.readbyqxmd.com/read/29666445/p52-expression-enhances-lung-cancer-progression
#7
Jamie A Saxon, Hui Yu, Vasiliy V Polosukhin, Georgios T Stathopoulos, Linda A Gleaves, Allyson G McLoed, Pierre P Massion, Fiona E Yull, Zhongming Zhao, Timothy S Blackwell
While many studies have demonstrated that canonical NF-κB signaling is a central pathway in lung tumorigenesis, the role of non-canonical NF-κB signaling in lung cancer remains undefined. We observed frequent nuclear accumulation of the non-canonical NF-κB component p100/p52 in human lung adenocarcinoma. To investigate the impact of non-canonical NF-κB signaling on lung carcinogenesis, we employed transgenic mice with doxycycline-inducible expression of p52 in airway epithelial cells. p52 over-expression led to increased tumor number and progression after injection of the carcinogen urethane...
April 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29666362/cooperative-stat-nf-%C3%AE%C2%BAb-signaling-regulates-lymphoma-metabolic-reprogramming-and-aberrant-got2-expression
#8
Maren Feist, Philipp Schwarzfischer, Paul Heinrich, Xueni Sun, Judith Kemper, Frederike von Bonin, Paula Perez-Rubio, Franziska Taruttis, Thorsten Rehberg, Katja Dettmer, Wolfram Gronwald, Jörg Reinders, Julia C Engelmann, Jan Dudek, Wolfram Klapper, Lorenz Trümper, Rainer Spang, Peter J Oefner, Dieter Kube
Knowledge of stromal factors that have a role in the transcriptional regulation of metabolic pathways aside from c-Myc is fundamental to improvements in lymphoma therapy. Using a MYC-inducible human B-cell line, we observed the cooperative activation of STAT3 and NF-κB by IL10 and CpG stimulation. We show that IL10 + CpG-mediated cell proliferation of MYClow cells depends on glutaminolysis. By 13 C- and 15 N-tracing of glutamine metabolism and metabolite rescue experiments, we demonstrate that GOT2 provides aspartate and nucleotides to cells with activated or aberrant Jak/STAT and NF-κB signaling...
April 17, 2018: Nature Communications
https://www.readbyqxmd.com/read/29666186/a-malaria-protein-factor-induces-il-4-production-by-dendritic-cells-via-pi3k-akt-nf-%C3%AE%C2%BAb-signaling-independent-of-myd88-trif-and-promotes-th2-response
#9
Xianzhu Wu, Nagaraj M Gowda, Yuka I Kawasawa, D Channe Gowda
Dendritic cells (DC) and cytokines produced by DC play crucial roles in inducing and regulating pro-/anti-inflammatory and Th1/Th2 responses. DC are known to produce Th1-promoting cytokine, IL-12, in response to malaria and other pathogenic infections, but it is thought that DC do not produce Th2-promoting cytokine, IL-4. Here, we show that a protein factor of malaria parasites induces IL-4 responses by CD11chi MHCIIhi CD3&epsilon;- CD49b- CD19- Fc&epsilon;RI- DC via PI3K-Akt-NF-κB signaling independent of TLR-MyD88/TRIF...
April 17, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29665857/the-htlv-1-oncoprotein-tax-is-modified-by-the-ubiquitin-related-modifier-1-urm1
#10
Rita Hleihel, Behzad Khoshnood, Ingrid Dacklin, Hayssam Omran, Carine Mouawad, Zeina Dassouki, Marwan El-Sabban, Margret Shirinian, Caroline Grabbe, Ali Bazarbachi
BACKGROUND: Adult T-cell leukemia/lymphoma (ATL) is an aggressive malignancy secondary to chronic human T-cell lymphotropic virus 1 infection, triggered by the virally encoded oncoprotein Tax. The transforming activity and subcellular localization of Tax is strongly influenced by posttranslational modifications, among which ubiquitylation and SUMOylation have been identified as key regulators of the nuclear/cytoplasmic shuttling of Tax, as well as its ability to activate NF-κB signaling...
April 17, 2018: Retrovirology
https://www.readbyqxmd.com/read/29665734/in-vivo-antitumor-effects-of-mk615-led-by-pd-l1-downregulation
#11
Masashi Yanaki, Masayuki Kobayashi, Atsushi Aruga, Minoru Nomura, Makoto Ozaki
BACKGROUND/AIM: MK615 extracted from Prunus mume was reported to have anti-inflammatory effects. In this article, we examined the in vivo antitumor effect of MK615 (an extract from Japanese apricot) using mouse tumor xenografts and focusing on the downregulation of PD-L1 (programmed death-ligand 1), a ligand of programmed cell death-1, a surface protein of activated T cells. MATERIALS AND METHODS: B16/BL6 melanoma cells were injected into C57BL/6 or BALB/c-nu/nu mice to establish lung metastasis...
April 1, 2018: Integrative Cancer Therapies
https://www.readbyqxmd.com/read/29665646/mir-29b-aggravates-lipopolysaccharide-induced-endothelial-cells-inflammatory-damage-by-regulation-of-nf-%C3%AE%C2%BAb-and-jnk-signaling-pathways
#12
Huifeng Yuan, Ji Ma, Tengfei Li, Xinwei Han
MicroRNAs (miRNAs) have been reported to involve in variety of biological progresses. The present study aimed to explore the functional roles of miR-29b in endothelial cells inflammatory damage, as well as the underlying mechanisms. Lipopolysaccharide (LPS) was used to induce endothelial cell inflammation, and the role of miR-29b in endothelial cells inflammatory damage was detected by testing cell viability, cell apoptosis, and the expression of inflammation factors after the suppression or overexpression of miR-29b...
March 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29665498/glabridin-an-isoflavan-from-licorice-root-ameliorates-imiquimod-induced-psoriasis-like-inflammation-of-balb-c-mice
#13
Penghui Li, Yonglian Li, Hong Jiang, Yuting Xu, Xiaoying Liu, Biao Che, Jian Tang, Guangrong Liu, Yadong Tang, Wei Zhou, Langyue Zhang, Changzhi Dong, Huixiong Chen, Kun Zhang, Zhiyun Du
In this paper, we investigate the effect of glabridin (Glab) on psoriasis. We observed that Glab significantly suppressed the levels of nitric oxide (NO), NF-κB subunit p65, interleukin (IL)-6, and IL-1β in lipopolysaccharide (LPS)-stimulated HaCaT cells. In addition, Glab treatment reduced the expression of IL-17A, IL-22, and IL-23 in TNF-α-stimulated-HaCaT cells. These findings prompted us to test whether Glab could be used to treat psoriasis in vivo. The effects of Glab on PASI scores, histopathological changes, oxidative/anti-oxidative indexes and pro-inflammatory cytokines in IMQ-induced mice were investigated...
April 14, 2018: International Immunopharmacology
https://www.readbyqxmd.com/read/29665476/bioactive-norditerpenoids-from-cephalotaxus-fortunei-var-alpina-and-c-lanceolata
#14
Ling Ni, Xiu-Hong Zhong, Xiao-Jiao Chen, Bing-Jie Zhang, Mei-Fen Bao, Xiang-Hai Cai
Twenty-eight naturally occurring Cephalotaxus tropone analogues, including 19 previously undescribed ones, were identified from Cephalotaxus fortunei Hook. var. alpina H. L. Li and C. lanceolata K. M. Feng. The presence of the C20 cephinoids A-E revealed that these tropones were assigned to the norditerpenoids and were perhaps derived from labdane-type diterpenoids. These norditerpenoids showed excellent cytotoxicity against human cancer cells (IC50 , 20-0.1 μM) in vitro. The SAR (structure-activity relationship) analysis disclosed that the tropone moiety and the lactone ring were crucial structural features for the observed activities...
April 14, 2018: Phytochemistry
https://www.readbyqxmd.com/read/29665364/casticin-inhibits-pdgf-induced-proliferation-and-migration-of-airway-smooth-muscle-cells
#15
Ying Dai, Ruiduo Cheng, Jie Gao, Ying Li, Chunyan Lou, Yanyang Li
Casticin (3', 5-dihydroxy-3, 4', 6, 7-tetramethoxyflavone), one of the main components from Vitex rotundifolia L., was reported to possess several pharmacological properties, including anti-inflammatory, hepatoprotective, anticancer, anti-asthma activities. However, the effects of casticin on airway smooth muscle cells (ASMCs) proliferation and migration have not been explored. This study aimed to evaluate the effects of casticin on the proliferation and migration of ASMCs, and study the possible molecular mechanism...
April 14, 2018: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29665074/parkin-deficiency-modulates-nlrp3-inflammasome-activation-by-attenuating-an-a20-dependent-negative-feedback-loop
#16
François Mouton-Liger, Thibault Rosazza, Julia Sepulveda-Diaz, Amélie Ieang, Sidi-Mohamed Hassoun, Emilie Claire, Graziella Mangone, Alexis Brice, Patrick P Michel, Jean-Christophe Corvol, Olga Corti
Neuroinflammation and mitochondrial dysfunction, key mechanisms in the pathogenesis of Parkinson's disease (PD), are usually explored independently. Loss-of-function mutations of PARK2 and PARK6, encoding the E3 ubiquitin protein ligase Parkin and the mitochondrial serine/threonine kinase PINK1, account for a large proportion of cases of autosomal recessive early-onset PD. PINK1 and Parkin regulate mitochondrial quality control and have been linked to the modulation of innate immunity pathways. We report here an exacerbation of NLRP3 inflammasome activation by specific inducers in microglia and bone marrow-derived macrophages from Park2-/- and Pink1-/- mice...
April 17, 2018: Glia
https://www.readbyqxmd.com/read/29665049/protective-effects-of-progranulin-against-focal-cerebral-ischemia-reperfusion-injury-in-rats-by-suppressing-endoplasmic-reticulum-stress-and-nf-%C3%AE%C2%BAb-activation-in-reactive-astrocytes
#17
Qing Shu, Hua Fan, Shi-Jun Li, Dan Zhou, Wei Ma, Xiao-Yan Zhao, Jun-Qiang Yan, Gang Wu
The aim of this study is to explore the effect progranulin (PGRN) has on endoplasmic reticulum (ER) stress and the NF-κB activation in reactive astrocytes found in rat models with focal cerebral ischemia-reperfusion (I/R) injury. Sprague-Dawley (SD) rats were grouped into the sham, I/R, PGRN-high dose, PGRN-low dose, and negative control (NC) groups. TTC staining was applied in order to detect the cerebral infarction volume, a TUNEL assay to detect the apoptosis rate of neurons, an ELISA to measure MDA, SOD, iNOS, LDH, TNF-α, IL-1β, IL-6, and IL-10 levels, and both RT-qPCR and western blotting methods in order to detect PGRN, GFAP, GRP78, CHOP, and NF-κB p65 expressions...
April 17, 2018: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29664496/stability-and-anti-inflammatory-activity-of-the-reduction-resistant-curcumin-analog-2-6-dimethyl-curcumin
#18
Akil I Joseph, Rebecca L Edwards, Paula B Luis, Sai Han Presley, Ned A Porter, Claus Schneider
The efficacy of the curry spice compound curcumin as a natural anti-inflammatory agent is limited by its rapid reductive metabolism in vivo. A recent report described a novel synthetic derivative, 2,6-dimethyl-curcumin, with increased stability against reduction in vitro and in vivo. It is also known that curcumin is unstable at physiological pH in vitro and undergoes rapid autoxidative transformation. Since the oxidation products may contribute to the biological effects of curcumin, we tested oxidative stability of 2,6-dimethyl-curcumin in buffer (pH 7...
April 17, 2018: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/29664292/alkaloids-from-pleiocarpa-pycnantha-pleiocarinine-a-bisindoline-alkaloid-formed-by-connecting-two-aspidofractinine-moieties-via-a-methylene-unit
#19
Joseph T Ndongo, Joséphine N Mbing, Aymeric Monteillier, Michel F Tala, Michael Rütten, Daniel Mombers, Muriel Cuendet, Dieudonné E Pegnyemb, Birger Dittrich, Hartmut Laatsch
Three new alkaloids, janetinine (1a), pleiocarinine (2), and huncaniterine B (3a), and 13 known compounds, pleiomutinine (3b), huncaniterine A (3c), 1-carbomethoxy-β-carboline (4), evoxanthine (5), deformyltalbotine acid lactone (6), pleiocarpamine (7), N4 -methyl-10-hydroxygeissoschizol (8), spegatrine (9), neosarpagine (10), aspidofractinine (11), N1 -methylkopsinin (12), pleiocarpine (13), and N1 -methylkopsinin- N4 -oxide (14), were isolated from the stem bark of Pleiocarpa pycnantha. Janetinine (1a) is a carbazole alkaloid; in pleiocarinine (2), two aspidofractinine-type alkaloids are bridged by a methylene unit in an unprecedented way, and huncaniterine B (3a) is a pleiocarpamine-aspidofractinine-type dimer...
April 17, 2018: Journal of Natural Products
https://www.readbyqxmd.com/read/29663988/-unfractionated-heparin-inhibits-the-activation-of-endothelial-cells-by-decreasing-the-degree-of-hoxa9-reduced-expression
#20
Rui Yang, Xiaojuan Zhang, Yingjian Liang, Xiaochun Ma
OBJECTIVE: To study unfractionated heparin (UFH) effect on the expression of HOXA9 in activation of human umbilical vein endothelial cells (HUVECs) induced by lipopolysaccharide (LPS). METHODS: HUVECs were cultured and they were randomly divided into four groups (n = 5) for the challenge respectively: (1) control group (with an equal volume of phosphate buffer saline); (2) LPS group (LPS 10 mg/L); (3) UFH group (UFH 10 kU/L); (4) UFH+LPS group (10 kU/L UFH 30 minutes + LPS 10 mg/L)...
April 2018: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
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