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https://www.readbyqxmd.com/read/29793105/copd-rat-model-is-more-susceptible-to-cold-stress-and-pm-2-5-exposure-and-the-underlying-mechanism
#1
Kai Zhang, Lei Guo, Qiaozhen Wei, Quanquan Song, Jiangtao Liu, Jingping Niu, Li Zhang, Ye Ruan, Bin Luo
The purpose of this study is to verify the hypothesis that chronic obstructive pulmonary disease (COPD) model rat is more susceptible to cold stress and fine particulate matter (PM2.5 ) exposure than the healthy rat, and explore the related mechanism. COPD rat model, established with cigarette smoke and lipopolysaccharide intratracheal instillation, were exposed to cold stress (0 °C) and PM2.5 (0, 3.2, 12.8 mg/ml). After that, the levels of superoxide dismutase, inducible nitric oxide synthase (iNOS), tumor necrosis factor alpha (TNF-α), monocyte chemotactic protein 1 (MCP-1) and angiotensin Ⅱ (Ang-Ⅱ) in lung were measured, as well as the expression levels of lung 8-hydroxy-2-deoxyguanosine (8-OHdG), nuclear factor kappa B (NF-κB), heme-oxygenase-1 (HO-1) and nuclear factor erythroid-2-related factor 2 (Nrf2)...
May 21, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29792195/histamine-activates-inflammatory-response-and-depresses-casein-synthesis-in-mammary-gland-of-dairy-cows-during-sara
#2
Guangjun Chang, Lailai Wang, Nana Ma, Wenwen Zhang, Huanmin Zhang, Hongyu Dai, Xiangzhen Shen
BACKGROUND: Mounting evidences observed that subacute ruminal acidosis (SARA) induced by high concentration (HC) diet increases the translocation of histamine from digestive tract into circulation causing a diverse of diseases in dairy cows. However, it is largely unknown how it does affect the function of mammary gland and milk quality. Hence, this study aims to observe the effects of histamine derived from the digestive tract on the inflammatory response and casein synthesis in the mammary glands during SARA...
May 23, 2018: BMC Veterinary Research
https://www.readbyqxmd.com/read/29791585/protective-effect-and-mechanism-of-lactobacillus-on-cerebral-ischemia-reperfusion-injury-in-rats
#3
Shi Wanchao, Ma Chen, Su Zhiguo, Xie Futang, Shi Mengmeng
The present study was designed to investigate the protective effects and mechanism of inactivated lactobacillus (ILA) on cerebral ischemia reperfusion injury (CIRI) in rats. In this experiment, 30 male Sprague Dawley rats were randomly divided into control group, IRI groups, and ILA group. A middle cerebral artery occlusion and reperfusion model was prepared. The rats were killed after 24 hours of recovery of blood flow of cerebral ischemia resulting from 60-min occlusion. The cerebral infarction volume and neurological scores were assayed by staining and behavioral observation...
2018: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/29790527/protective-activity-of-tovophyllin-a-a-xanthone-isolated-from-garcinia-mangostana-pericarps-against-acetaminophen-induced-liver-damage-role-of-nrf2-activation
#4
Sabrin R M Ibrahim, Dina S El-Agamy, Hossam M Abdallah, Nishat Ahmed, Mohamed A Elkablawy, Gamal A Mohamed
Garcinia mangostana L. (GM, family Guttiferae) is one of the most widely recognized tropical fruits. GM is a wealthy pool of xanthones that exhibit a wide range of bioactivities. Tovophyllin A (TA) separated from GM pericarps was tested for its efficacy to ameliorate acetaminophen (APAP)-induced liver injury. Mice were injected with a single dose of APAP with or without TA pretreatment. The protective effects of TA against APAP-induced liver damage were evident through amelioration of serum indices of hepatotoxicity and improvement of hepatic histopathologic lesions...
May 23, 2018: Food & Function
https://www.readbyqxmd.com/read/29789597/enhancer-of-zeste-homolog-2-catalysed-h3k27-trimethylation-plays-a-key-role-in-acute-on-chronic-liver-failure-via-tnf-mediated-pathway
#5
Tianhui Zhou, Ye Sun, Ming Li, Yongsen Ding, Rongkun Yin, Ziqiang Li, Qing Xie, Shisan Bao, Wei Cai
Acute-on-chronic liver failure is mainly due to host immunity self-destruction. The histone H3 lysine 27 (H3K27) trimethylating enzyme, enhancer of zeste homolog 2 (EZH2) mediates epigenetic silencing of gene expression and regulates immunity, also involves pathogenesis of several liver diseases. The current study was to determine the role of methyltransferase EZH2 and its catalysed H3K27 trimethylation (H3K27me3) in liver failure, and to further investigate the potential target for liver failure treatment...
May 22, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29789522/a20-critically-controls-microglia-activation-and-inhibits-inflammasome-dependent-neuroinflammation
#6
Sofie Voet, Conor Mc Guire, Nora Hagemeyer, Arne Martens, Anna Schroeder, Peter Wieghofer, Carmen Daems, Ori Staszewski, Lieselotte Vande Walle, Marta Joana Costa Jordao, Mozes Sze, Hanna-Kaisa Vikkula, Delphine Demeestere, Griet Van Imschoot, Charlotte L Scott, Esther Hoste, Amanda Gonçalves, Martin Guilliams, Saskia Lippens, Claude Libert, Roos E Vandenbroucke, Ki-Wook Kim, Steffen Jung, Zsuzsanna Callaerts-Vegh, Patrick Callaerts, Joris de Wit, Mohamed Lamkanfi, Marco Prinz, Geert van Loo
Microglia, the mononuclear phagocytes of the central nervous system (CNS), are important for the maintenance of CNS homeostasis, but also critically contribute to CNS pathology. Here we demonstrate that the nuclear factor kappa B (NF-κB) regulatory protein A20 is crucial in regulating microglia activation during CNS homeostasis and pathology. In mice, deletion of A20 in microglia increases microglial cell number and affects microglial regulation of neuronal synaptic function. Administration of a sublethal dose of lipopolysaccharide induces massive microglia activation, neuroinflammation, and lethality in mice with microglia-confined A20 deficiency...
May 23, 2018: Nature Communications
https://www.readbyqxmd.com/read/29786670/deubiquitinylase-usp47-promotes-rela-phosphorylation-and-survival-in-gastric-cancer-cells
#7
Lara Naghavi, Martin Schwalbe, Ahmed Ghanem, Michael Naumann
Every year, gastric cancer causes around 819,000 deaths worldwide. The incidence of gastric cancer in the western world is slowly declining, but the prognosis is unpromising. In Germany, the 5-year-survival rate is around 32%, and the average life span after diagnosis is 6 to 9 months. Therapy of gastric cancer patients comprises a gastrectomy and perioperative or adjuvant chemotherapy. However, resistance of gastric cancer cells to these agents is widespread; thus, improved chemotherapeutic approaches are required...
May 22, 2018: Biomedicines
https://www.readbyqxmd.com/read/29785588/sam68-promotes-invasion-migration-and-proliferation-of-fibroblast-like-synoviocytes-by-enhancing-the-nf-%C3%AE%C2%BAb-p65-pathway-in-rheumatoid-arthritis
#8
Weiwei Sun, Rongqin Qin, Rui Wang, Dazhi Ding, Zhaohui Yu, Yuxi Liu, Ruilong Hong, Zhen Cheng, Youhua Wang
Src-associated substrate during mitosis of 68 KDa (Sam68), also known as KH domain containing, RNA binding, signal transduction associated 1 (KHDRBS1), is the prototypic member of the signal transduction activator of RNA (STAR) family of RNA-binding proteins. Previous studies have indicated that Sam68 regulates nuclear transcription factor kappa B (NF-κB) to mediate inflammation. In this study, we analyzed the effect and possible mechanisms of Sam68 in rheumatoid arthritis (RA). By western blot analysis and immunohistochemistry, we found that the expression of Sam68 in synovial tissue of RA patients was increased compared with the control group...
May 21, 2018: Inflammation
https://www.readbyqxmd.com/read/29785400/previous-exercise-training-reduces-markers-of-renal-oxidative-stress-and-inflammation-in-streptozotocin-induced-diabetic-female-rats
#9
Liliany Souza de Brito Amaral, Cláudia Silva Souza, Rildo Aparecido Volpini, Maria Heloisa Massola Shimizu, Ana Carolina de Bragança, Daniele Canale, Antonio Carlos Seguro, Terezila Machado Coimbra, Amélia Cristina Mendes de Magalhães, Telma de Jesus Soares
The aim of this study is to evaluate the effects of regular moderate exercise training initiated previously or after induction of diabetes mellitus on renal oxidative stress and inflammation in STZ-induced diabetic female rats. For this purpose, Wistar rats were divided into five groups: sedentary control (SC), trained control (TC), sedentary diabetic (SD), trained diabetic (TD), and previously trained diabetic (PTD). Only the PTD group was submitted to treadmill running for 4 weeks previously to DM induction with streptozotocin (40 mg/kg, i...
2018: Journal of Diabetes Research
https://www.readbyqxmd.com/read/29785049/involvement-of-inhibitor-kappa-b-kinase-2-ikk2-in-the-regulation-of-vascular-tone
#10
Youngin Kwon, Soo-Kyoung Choi, Seonhee Byeon, Young-Ho Lee
Inhibitor kappa B kinase 2 (IKK2) plays an essential role in the activation of nuclear factor kappa B (NF-kB). Recently, it has been suggested that IKK2 acts as a myosin light chain kinase (MLCK) and contributes to vasoconstriction in mouse aorta. However, the underlying mechanisms are still unknown. Therefore, we investigated whether IKK2 acts as a MLCK or regulates the activity of myosin light chain phosphatase (MLCP). Pressure myograph was used to measure vascular tone in rat mesenteric arteries. Immunofluorescence staining was performed to identify phosphorylation levels of MLC (ser19), MYPT1 (thr853 and thr696) and CPI-17 (thr38)...
May 21, 2018: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/29785022/novel-peptide-gx1-inhibits-angiogenesis-by-specifically-binding-to-transglutaminase-2-in-the-tumorous-endothelial-cells-of-gastric-cancer
#11
Zhijie Lei, Na Chai, Miaomiao Tian, Ying Zhang, Guodong Wang, Jian Liu, Zuhong Tian, Xiaofang Yi, Di Chen, Xiaowei Li, Pengfei Yu, Hao Hu, Bing Xu, Chao Jian, Zhenyuan Bian, Hao Guo, Jinpeng Wang, Shiming Peng, Yongzhan Nie, Niu Huang, Sijun Hu, Kaichun Wu
The clinical application of GX1, an optimal gastric cancer (GC) targeting peptide, is greatly limited because its receptor in the GC vasculature is unknown. In this study, we screened the candidate receptor of GX1, transglutaminase-2(TGM2), by co-immunoprecipitation (co-IP) combined with mass spectrometry. We found that TGM2 was up-regulated in GC vascular endothelial cells and that GX1 receptor expression was suppressed correspondingly after TGM2 downregulation. A highly consistent co-localization of GX1 receptor and TGM2 was detected at both the cellular and tissue levels...
May 21, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29784900/irak-inhibitor-protects-the-intestinal-tract-of-necrotizing-enterocolitis-by-inhibiting-the-toll-like-receptor-tlr-inflammatory-signaling-pathway-in-rats
#12
Yu Hou, Xin Lu, Yueju Zhang
BACKGROUND The aim of this study was to assess the effects of interleukin-1 (IL-1) receptor associated kinase (IRAK) inhibitors on intestinal injury induced by necrotizing enterocolitis (NEC) in neonatal rats and its regulation on the intestinal Toll-like receptor (TLR) inflammatory signaling pathway. MATERIAL AND METHODS The neonatal rat models of NEC were established though hypoxia-cold stimulation. All rats were divided into 3 groups: an NEC model group (NEC group), an IRAK inhibitor group (IRAKI group), and a normal control group (NC group)...
May 22, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29784863/the-gpi-transamidase-complex-subunit-pbgpi16-of-plasmodium-berghei-is-important-for-inducing-experimental-cerebral-malaria
#13
Qingyang Liu, Yan Zhao, Li Zheng, Xiaotong Zhu, Liwang Cui, Yaming Cao
In animal models of experimental cerebral malaria (ECM), the glycosylphosphatidylinositols (GPIs) and GPI anchors are the major factors that induce nuclear factor kappa B (NF-κB) activation and proinflammatory responses, which contribute to malaria pathogenesis. GPIs and GPI anchors are transported to the cell surface via a process called GPI transamidation, which involves the GPI transamidase (GPI-T) complex. In this study, we showed that GPI16, one of the GPI-T subunits, is highly conserved among Plasmodium species...
May 21, 2018: Infection and Immunity
https://www.readbyqxmd.com/read/29782911/estrogen-deficiency-exacerbates-a%C3%AE-induced-memory-impairment-through-enhancement-of-neuroinflammation-amylodogenesis-and-nf-%C3%A4-b-activation-in-ovariectomized-mice
#14
Jaesuk Yun, In Jun Yeo, Chul Ju Hwang, Dong-Young Choi, Hyung-Sik Im, Ji Youg Kim, Won Rak Choi, Myung Hee Jung, Sang-Bae Han, Jin Tae Hong
Estrogen is well known to have a preventative effect in Alzheimer's disease (AD) pathology. Several studies have demonstrated that nuclear factor kappa-B (NF-ĸB) can contribute to the effects of estrogen on the development of AD. We investigated whether NF-ĸB affects amyloid-beta (Aβ)-induced memory impairment in an estrogen-lacking condition. In the present study, nine-week-old Institute cancer research (ICR) mice were ovariectomized to block estrogen stimulation. Ten weeks after the ovariectomization, mice were administered with Aβ (300 pmol) via intracerebroventricular (ICV) infusion for 2 weeks...
May 18, 2018: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/29782821/licoricidin-enhances-gemcitabine-induced-cytotoxicity-in-osteosarcoma-cells-by-suppressing-the-akt-and-nf-%C3%AE%C2%BAb-signal-pathways
#15
Yifei Wang, Shengli Wang, Jianhua Liu, Yanxiao Lu, Donghui Li
Osteosarcoma (OS) is the most common bone malignancy in children and adolescents. Combined treatments of anti-cancer drugs can remarkably improve chemotherapeutic outcomes. Gemcitabine and licoricidin both have potential anti-tumor activity in several cancers. However, the combined therapeutic efficiency of gemcitabine and licoricidin for OS has not been explored. Here, we found that licoricidin or gemcitabine inhibited OS cell viability in a dose-dependent manner. Cotreatment with licoricidin and gemcitabine enhanced gemcitabine-induced cytotoxicity in OS cells...
May 18, 2018: Chemico-biological Interactions
https://www.readbyqxmd.com/read/29782621/darpp-32-and-t-darpp-promote-non-small-cell-lung-cancer-growth-through-regulation-of-ikk%C3%AE-dependent-cell-migration
#16
Sk Kayum Alam, Matteo Astone, Ping Liu, Stephanie R Hall, Abbygail M Coyle, Erin N Dankert, Dane K Hoffman, Wei Zhang, Rui Kuang, Anja C Roden, Aaron S Mansfield, Luke H Hoeppner
Lung cancer is the leading cause of cancer-related death worldwide. Here we demonstrate that elevated expression of dopamine and cyclic adenosine monophosphate-regulated phosphoprotein, Mr 32000 (DARPP-32) and its truncated splice variant t-DARPP promote lung tumor growth, while abrogation of DARPP-32 expression in human non-small cell lung cancer (NSCLC) cells reduces tumor growth in orthotopic mouse models. We observe a novel physical interaction between DARPP-32 and inhibitory kappa B kinase-α (IKKα) that promotes NSCLC cell migration through non-canonical nuclear factor kappa-light-chain-enhancer of activated B cells 2 (NF-κB2) signaling...
2018: Communications biology
https://www.readbyqxmd.com/read/29780898/sumoylation-and-phosphorylation-cross-talk-in-hepatocellular-carcinoma
#17
REVIEW
Maria Lauda Tomasi, Komal Ramani
Hepatocellular carcinoma (HCC) is a primary malignancy of the liver and occurs predominantly in patients with underlying chronic liver disease and cirrhosis. The large spectrum of protein post-translational modification (PTM) includes numerous critical signaling events that occur during neoplastic transformation. PTMs occur to nearly all proteins and increase the functional diversity of proteins. We have reviewed the role of two major PTMs, SUMOylation and phosphorylation, in the altered signaling of key players in HCC...
2018: Translational Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/29779861/hopq-impacts-the-integrin-%C3%AE-5%C3%AE-1-independent-nf-%C3%AE%C2%BAb-activation-by-helicobacter-pylori-in-ceacam-expressing-cells
#18
Michael Hartmut Feige, Olga Sokolova, Anna Pickenhahn, Gunter Maubach, Michael Naumann
Helicobacter pylori infection persists in more than half of the world's population and represents a risk factor for peptic ulcer disease and gastric cancer. Virulent strains of H. pylori carry a cag pathogenicity island (cagPAI), which encodes a type IV secretion system (T4SS) with the capability to inject the effector protein cytotoxin-associated gene A (CagA) into eukaryotic cells. Colonisation of the gastric epithelium by H. pylori provokes direct activation of the proinflammatory and survival factor nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB)...
May 14, 2018: International Journal of Medical Microbiology: IJMM
https://www.readbyqxmd.com/read/29779214/cyanidin-3-glucoside-inhibits-inflammatory-activities-in-human-fibroblast-like-synoviocytes-and-in-mice-with-collagen-induced-arthritis
#19
Yan Sun, Lingling Li
Rheumatoid arthritis (RA) is a chronic autoimmune disease characterized by joint tissue inflammation. Cyanidin-3-glucoside (C3G) is a major component in the flavonoid family and has shown anti-inflammatory, anti-oxidant and anti-tumor activity. In this study, we investigated the effects of C3G on lipopolysaccharides (LPS)-induced inflammation on human rheumatoid fibroblast-like synoviocytes (FLS) and on collagen-induced arthritis (CIA) mice model. We treated FLS with C3G followed by LPS induction, the expressions of tumor necrosis factor alpha (TNF-α), interleukin 1 beta (IL-1β) and IL-6 and the activation of nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) and mitogen-activated protein kinase (MAPK) signaling pathway were analyzed...
May 19, 2018: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29778672/defective-myd88-and-irak4-but-not-tlr-2-expression-in-hiv-individuals-with-latent-tuberculosis-infection
#20
Kamakshi Prudhula Devalraju, Venkata Sanjeev Kumar Neela, Ramulu Gaddam, Arunabala Chaudhury, Abhinav Van, Siva Sai Krovvidi, Ramakrishna Vankayalapati, Vijaya Lakshmi Valluri
HIV infection markedly increases the likelihood of latent tuberculosis infection progressing to active TB. Information on expression of TLR-2, myeloid differentiation factor (MyD88), IL-1R- associated kinase-4 (IRAK4) and nuclear factor kappa B (NF-kB) in HIV+LTBI+ and HIV+ patients with active TB disease is limited. We found significantly higher percentages of CD14+TLR2+ cells in PBMCs of HIV+LTBI+ patients compared to HIV-LTBI+ individuals. γ-irradiated Mtb was unable to induce MyD88, IRAK4 expression and IL-1β, MCP-1, IP-10 production in HIV+LTBI+ patients...
May 17, 2018: Cytokine
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