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https://www.readbyqxmd.com/read/29789500/human-metapneumovirus-small-hydrophobic-protein-inhibits-interferon-induction-in-plasmacytoid-dendritic-cells
#1
Xiaoyong Bao, Deepthi Kolli, Dana Esham, Thangam S Velayutham, Antonella Casola
Human metapneumovirus (hMPV), a leading cause of respiratory tract infections in infants, encodes a small hydrophobic (SH) protein of unknown function. Here we show that infection of plasmacytoid dendritic cells (pDCs) with a recombinant virus lacking SH expression (rhMPV-ΔSH) enhanced the secretion of type I interferons (IFNs), which required TLR7 and MyD88 expression. HMPV SH protein inhibited TLR7/MyD88/TRAF6 signaling leading to IFN gene transcription, identifying a novel mechanism by which paramyxovirus SH proteins modulate innate immune responses...
May 23, 2018: Viruses
https://www.readbyqxmd.com/read/29772244/gender-difference-in-the-effect-of-progesterone-on-neonatal-hypoxic-ischemic-brain-injury-in-mouse
#2
Shuyu Dong, Qian Zhang, Delian Kong, Chao Zhou, Jie Zhou, Jingjing Han, Yan Zhou, Guoliang Jin, Xiaodong Hua, Jun Wang, Fang Hua
This study was to investigate the effects of progesterone (PROG) on neonatal hypoxic/ischemic (NHI) brain injury, the differences in effects between genders, and the underlying mechanisms. NHI brain injury was established in both male and female neonatal mice induced by occlusion of the left common carotid artery followed by hypoxia. The mice were treated with PROG or vehicle. Fluoro-Jade B staining (F-JB), long term behavior testing, and brain magnetic resonance image (MRI) were applied to evaluate neuronal death, neurological function, and brain damage...
May 14, 2018: Experimental Neurology
https://www.readbyqxmd.com/read/29763384/the-effects-of-dihydroartemisinin-on-inflammatory-bowel-disease-related-bone-loss-in-a-rat-model
#3
Xingtao Ge, Zhijian Chen, Zhenjie Xu, Fang Lv, Kewei Zhang, Yu Yang
Bone loss is one of the important extra-intestinal manifestations in patients with inflammatory bowel diseases (IBDs). Compounds derived from natural products have been used to treat IBDs. However, the role of natural products on IBD-induced bone loss is not completely clarified. In the present study, we observed the effects of dihydroartemisinin (DHA), an antimalaria drug, on IBD and IBD-induced bone loss in a rat model. Chronic IBD model was established in Sprague-Dawley rats by giving them 2.5% dextran sodium sulfate in drinking water...
May 2018: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/29758494/uncovering-potential-anti-neuroinflammatory-components-of-modified-wuziyanzong-prescription-through-a-target-directed-molecular-docking-fingerprint-strategy
#4
Jinfeng Chen, Jinlong Wang, Yingyuan Lu, Shaoyang Zhao, Qian Yu, Xuemei Wang, Pengfei Tu, Kewu Zeng, Yong Jiang
Neuroinflammation is a main factor in the pathogenesis of neurodegenerative diseases, such as Alzheimer disease. Our previous studies indicated that the modified Wuziyanzong Prescription (MWP) can suppress neuroinflammatory responses via nuclear factor-kappa B (NF-κB) and mitogen-activated protein kinases (MAPKs) signaling pathways. However, the anti-neuroinflammatory components of MWP remain unclear. Herein, a target-directed molecular docking fingerprint (TMDF) strategy, via integrating the chemical profiling and molecular docking approaches, was developed to identify the potential anti-neuroinflammatory components of MWP...
May 1, 2018: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29749442/an-active-component-containing-pterodontic-acid-and-pterodondiol-isolated-from-laggera-pterodonta-inhibits-influenza-a-virus-infection-through-the-tlr7-myd88-traf6-nf%C3%A2-%C3%AE%C2%BAb-signaling-pathway
#5
Yutao Wang, Jing Li, Wen Yan, Qiaolian Chen, Zhihong Jiang, Rongping Zhang, Xiping Pan, Xinhua Wang
The influenza virus is a pathogen that can cause pandemic and epidemic outbreaks, and therefore represents a severe threat to human health. Antiviral drugs have an important role in the prevention and treatment of influenza, although the increasing emergence of drug resistance has given rise to a requirement for the development of novel antiviral drugs. In the present study, an active component (C8) isolated from Laggera pterodonta was evaluated. The nuclear magnetic resonance spectroscopy and mass spectrometry analysis results revealed that two eudesmane‑type sesquiterpene compounds were identified in C8; pterodontic acid and pterodondiol...
May 2, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29746822/tabersonine-attenuates-lipopolysaccharide-induced-acute-lung-injury-via-suppressing-traf6-ubiquitination
#6
Depeng Zhang, Xiaozong Li, Yudong Hu, Hongchao Jiang, Yaxian Wu, Yunhe Ding, Kaikai Yu, Huiqiong He, Jingsong Xu, Lei Sun, Feng Qian
Sepsis caused by Gram-negative bacteria is one of major causes for the progression of acute lung injury (ALI) with limited treatment and effective medicines. Tabersonine is an indole alkaloid mainly isolated from Catharanthus roseus, and a potential drug candidate for treatment of cancer and Alzheimer's disease (AD), however, its anti-inflammatory effect has not been revealed. In this study, we reported that tabersonine ameliorated lipopolysaccharides (LPS)-induced ALI in vivo and inhibited LPS-mediated macrophage activation in vitro...
May 7, 2018: Biochemical Pharmacology
https://www.readbyqxmd.com/read/29745371/microrna-194-inhibits-lipopolysaccharide-induced-inflammatory-response-in-nucleus-pulposus-cells-of-the-intervertebral-disc-by-targeting-tnf-receptor-associated-factor-6-traf6
#7
Lili Kong, Mingxiao Sun, Zhaofu Jiang, Liming Li, Bing Lu
BACKGROUND The dramatic increase of intervertebral disc degeneration (IDD) is considered to be a major cause of discogenic low back pain. The current study focused on the regulatory function of microRNA-194 (miR-194) on lipopolysaccharide (LPS)-induced inflammatory response in nucleus pulposus (NP) cells. MATERIAL AND METHODS LPS was used to treat NP cells to induce inflammatory responses. MiRNA and gene expression were detected by quantitative PCR. Proteins and protein expression levels were detected by Western blot and ELISA kit...
May 10, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29734366/induction-of-otud1-by-rna-viruses-potently-inhibits-innate-immune-responses-by-promoting-degradation-of-the-mavs-traf3-traf6-signalosome
#8
Liting Zhang, Jin Liu, Liping Qian, Qian Feng, Xiaofang Wang, Yukang Yuan, Yibo Zuo, Qiao Cheng, Ying Miao, Tingting Guo, Xiaofeng Zheng, Hui Zheng
During RNA virus infection, the adaptor protein MAVS recruits TRAF3 and TRAF6 to form a signalosome, which is critical to induce the production of type I interferons (IFNs) and proinflammatory cytokines. While activation of the MAVS/TRAF3/TRAF6 signalosome is well studied, the negative regulation of the signalosome remains largely unknown. Here we report that RNA viruses specifically promote the deubiquitinase OTUD1 expression by NF-κB-dependent mechanisms at the early stage of viral infection. Furthermore, OTUD1 upregulates protein levels of intracellular Smurf1 by removing Smurf1 ubiquitination...
May 7, 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29733298/snasp-inhibits-tlr-signaling-to-regulate-immune-response-in-sepsis
#9
Feng-Ming Yang, Yong Zuo, Wei Zhou, Chuan Xia, Bumsuk Hahm, Mark Sullivan, Jinke Cheng, Hui-Ming Chang, Edward Th Yeh
Many Toll-like receptors (TLRs) signal through TNF receptor-associated factor 6 (TRAF6) to activate innate immune responses. Here, we show that somatic nuclear autoantigenic sperm protein (sNASP) binds to TRAF6 to prevent TRAF6 autoubiquitination in unstimulated macrophages. Following LPS stimulation, a complex consisting of sNASP, TRAF6, IRAK4, and casein kinase 2 (CK2) is formed. CK2 phosphorylates sNASP at serine 158, allowing sNASP to dissociate from TRAF6. Free TRAF6 is then autoubiquitinated, followed by activation of downstream signaling pathways...
May 7, 2018: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29725271/the-protective-mechanism-of-cay10683-on-intestinal-mucosal-barrier-in-acute-liver-failure-through-lps-tlr4-myd88-pathway
#10
Yao Wang, Hui Chen, Qian Chen, Fang-Zhou Jiao, Wen-Bin Zhang, Zuo-Jiong Gong
The purpose of this study was to investigate the protective mechanism of HDAC2 inhibitor CAY10683 on intestinal mucosal barrier in acute liver failure (ALF). In order to establish ALF-induced intestinal epithelial barrier disruption models, D-galactosamine/LPS and LPS were, respectively, used with rats and NCM460 cell and then administrated with CAY10683. Transepithelial electrical resistance (TEER) was measured to detect the permeability of cells. Real-time PCR and Western blotting were employed to detect the key mRNA and protein levels...
2018: Mediators of Inflammation
https://www.readbyqxmd.com/read/29720226/increased-a20-e3-ubiquitin-ligase-interactions-in-bid-deficient-glia-attenuate-tlr3-and-tlr4-induced-inflammation
#11
Sinéad Kinsella, Michael Fichtner, Orla Watters, Hans-Georg König, Jochen H M Prehn
BACKGROUND: Chronic pro-inflammatory signaling propagates damage to neural tissue and affects the rate of disease progression. Increased activation of Toll-like receptors (TLRs), master regulators of the innate immune response, is implicated in the etiology of several neuropathologies including amyotrophic lateral sclerosis, Alzheimer's disease, and Parkinson's disease. Previously, we identified that the Bcl-2 family protein BH3-interacting domain death agonist (Bid) potentiates the TLR4-NF-κB pro-inflammatory response in glia, and specifically characterized an interaction between Bid and TNF receptor associated factor 6 (TRAF6) in microglia in response to TLR4 activation...
May 2, 2018: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29717214/nanoimmunotherapy-targeting-cd40-traf6-signalling-to-reduce-atherosclerosis
#12
Gregory B Lim
No abstract text is available yet for this article.
May 1, 2018: Nature Reviews. Cardiology
https://www.readbyqxmd.com/read/29712904/the-senescence-associated-secretory-phenotype-is-potentiated-by-feedforward-regulatory-mechanisms-involving-zscan4-and-tak1
#13
Boyi Zhang, Da Fu, Qixia Xu, Xianling Cong, Chunyan Wu, Xiaoming Zhong, Yushui Ma, Zhongwei Lv, Fei Chen, Liu Han, Min Qian, Y Eugene Chin, Eric W-F Lam, Paul Chiao, Yu Sun
The senescence-associated secretory phenotype (SASP) can be provoked by side effects of therapeutic agents, fueling advanced complications including cancer resistance. However, the intracellular signal network supporting initiation and development of the SASP driven by treatment-induced damage remains unclear. Here we report that the transcription factor Zscan4 is elevated for expression by an ATM-TRAF6-TAK1 axis during the acute DNA damage response and enables a long term SASP in human stromal cells. Further, TAK1 activates p38 and PI3K/Akt/mTOR to support the persistent SASP signaling...
April 30, 2018: Nature Communications
https://www.readbyqxmd.com/read/29710534/antiviral-effects-of-ma-huang-tang-against-h1n1-influenza-virus-infection-in-vitro-and-in-an-icr-pneumonia-mouse-model
#14
Wenyang Wei, Haitong Wan, Xueqian Peng, Huifen Zhou, Yiyu Lu, Yu He
Ma Huang Tang (MHT), a classical Chinese herbal decoction which has been used in clinic for thousands of years, was very effective in treating the upper respiratory tract infection. But its activity against influenza virus A, the anti-inflammatory effect and the underlying mechanisms have been poorly investigated in previous researches. In this study, the antiviral efficacy of MHT directly inhibiting influenza virus A was investigated in vitro in MDCK cells. In an ICR pneumonia mouse model infected with influenza virus A PR/8/34, MHT (8, 4 and 2 g/kg) were oral administrated for 7 days after viral challenge, to evaluate the effect of MHT on ameliorating viral pneumonia and decipher the underlying mechanisms...
April 5, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29708513/dna-methyltransferase-expression-in-triple-negative-breast-cancer-predicts-sensitivity-to-decitabine
#15
Jia Yu, Bo Qin, Ann M Moyer, Somaira Nowsheen, Tongzheng Liu, Sisi Qin, Yongxian Zhuang, Duan Liu, Shijia W Lu, Krishna R Kalari, Daniel W Visscher, John A Copland, Sarah A McLaughlin, Alvaro Moreno-Aspitia, Donald W Northfelt, Richard J Gray, Zhenkun Lou, Vera J Suman, Richard Weinshilboum, Judy C Boughey, Matthew P Goetz, Liewei Wang
Triple-negative breast cancer (TNBC) is a heterogeneous disease with poor prognosis that lacks targeted therapies, especially in patients with chemotherapy-resistant disease. Since DNA methylation-induced silencing of tumor suppressors is common in cancer, reversal of promoter DNA hypermethylation by 5-aza-2'-deoxycytidine (decitabine), an FDA-approved DNA methyltransferase (DNMT) inhibitor, has proven effective in treating hematological neoplasms. However, its antitumor effect varies in solid tumors, stressing the importance of identifying biomarkers predictive of therapeutic response...
April 30, 2018: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29705949/a-network-map-of-il-33-signaling-pathway
#16
Sneha M Pinto, Yashwanth Subbannayya, D A B Rex, Rajesh Raju, Oishi Chatterjee, Jayshree Advani, Aneesha Radhakrishnan, T S Keshava Prasad, Mohan R Wani, Akhilesh Pandey
Interleukin-33 (IL-33) is a member of the IL-1 family of cytokines that play a central role in the regulation of immune responses. Its release from epithelial and endothelial cells is mediated by pro-inflammatory cytokines, cell damage and by recognition of pathogen-associated molecular patterns (PAMPs). The activity of IL-33 is mediated by binding to the IL-33 receptor complex (IL-33R) and activation of NF-κB signaling via the classical MyD88/IRAK/TRAF6 module. IL-33 also induces the phosphorylation and activation of ERK1/2, JNK, p38 and PI3K/AKT signaling modules resulting in the production and release of pro-inflammatory cytokines...
April 28, 2018: Journal of Cell Communication and Signaling
https://www.readbyqxmd.com/read/29703234/bortezomib-enhances-radiosensitivity-in-oral-cancer-through-inducing-autophagy-mediated-traf6-oncoprotein-degradation
#17
Yuan-Hua Wu, Wun-Syuan Wu, Li-Ching Lin, Chiang-Shin Liu, Sheng-Yow Ho, Bour-Jr Wang, Bu-Miin Huang, Ya-Ling Yeh, Hui-Wen Chiu, Wei-Lei Yang, Ying-Jan Wang
BACKGROUND: Oral squamous cell carcinoma (OSCC) is a malignant tumor that may occur anywhere within the oral cavity. The survival rate of OSCC patients has not improved over the past decades due to its heterogeneous etiology, genetic aberrations, and treatment outcomes. We investigated the role of tumor necrosis factor receptor-associated factor 6 (TRAF6) in OSCC cells treated with bortezomib (a proteasome inhibitor) combined with irradiation (IR) treatment. METHODS: The effects of combined treatment in OSCC cells were investigated using assays of cell viability, autophagy, apoptosis, western blotting, and immunofluorescence staining...
April 27, 2018: Journal of Experimental & Clinical Cancer Research: CR
https://www.readbyqxmd.com/read/29693168/mir-146a-promotes-cervical-cancer-cell-viability-via-targeting-irak1-and-traf6
#18
Qiming Hu, Jiacheng Song, Bo Ding, Yugui Cui, Jiale Liang, Suping Han
Cervical cancer is the third most common type of cancer in women, and microRNAs play an important role in this type of cancer. The elevated expression of miR-146a is involved in the pathogenesis of cancers generally, but its role in cervical cancer has not been fully elucidated. In the present study, we assessed the expression of miR-146a in G>C polymorphisms and confirmed that the overexpression of miR-146a promoted cervical cancer cell viability. The recombinant expression plasmids pre-miR-146a-G or pre-miR-146a-C including single nucleotide polymorphisms (SNP) were successfully constructed...
April 23, 2018: Oncology Reports
https://www.readbyqxmd.com/read/29689277/butyrate-ameliorated-nlrc3-protects-the-intestinal-barrier-in-a-gpr43-dependent-manner
#19
Di Cheng, Ji-Hao Xu, Jie-Yao Li, Si-Yi Wang, Ting-Feng Wu, Qi-Kui Chen, Tao Yu
BACKGROUND: Intestinal barrier dysfunctions are related to dysbacteriosis and chronic gut inflammation in type 2 diabetes. Although there is emerging evidence that the chronic gut inflammatory response is stimulated by nucleotide-binding oligomerization domain-like receptors (NLRs), the relationship and precise mechanism between NLRC3 and the colonic epithelial barrier remains largely elusive. METHODS: We investigated the function and mechanism of NLRC3 in the colonic tissues of diabetic mice and colonic epithelial cell lines...
April 21, 2018: Experimental Cell Research
https://www.readbyqxmd.com/read/29678844/patients-with-unexplained-recurrent-spontaneous-abortion-show-decreased-levels-of-microrna-146a-5p-in-the-deciduae
#20
Liwei Zhao, Jian Li, Shiyun Huang
BACKGROUND: Immune intolerance of the fetal-placental unit may be a contributing cause of unexplained recurrent spontaneous abortion (URSA). OBJECTIVES: This study is to investigate the relevance of the miR-146a-5p/IFN-γ pathway to URSA. MATERIAL AND METHODS: Quantitative real-time RT-PCR and western blot were performed to compare the levels of miR-146a-5p, IFN-γ, IRAK1, and TRAF6 in the deciduae of URSA (n=29) and healthy women (n=35) after an elective abortion...
March 2018: Annals of Clinical and Laboratory Science
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