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https://www.readbyqxmd.com/read/28731516/mir-181d-regulates-human-dendritic-cell-maturation-through-nf-%C3%AE%C2%BAb-pathway
#1
Xian Wei Su, Gang Lu, Chi Kwan Leung, Qiang Liu, Yi Li, Kam Sze Tsang, Shi Dou Zhao, Danny Tat Ming Chan, Hsiang Fu Kung, Wai Sang Poon
OBJECTIVES: MicroRNAs (miRNAs) are considered as the cellular regulators which post-transcriptionally modulate gene expression in diverse biological processes including cell development and immunity. In this study, we investigated functions of miR-181d in dendritic cells (DCs) maturation, and the underlying mechanisms were also explored. MATERIALS AND METHODS: Here we did the miRNA screening in human DCs in response to lipopolysaccharides (LPS) by quantitative real-time PCR (qRT-PCR)...
July 21, 2017: Cell Proliferation
https://www.readbyqxmd.com/read/28710013/murine-bone-marrow-derived-dcs-activated-by-porcine-rotavirus-stimulate-the-th1-subtype-response-in%C3%A2-vitro
#2
Liping Ye, Yanlong Jiang, Guilian Yang, Wentao Yang, Jingtao Hu, Yulin Cui, Chunwei Shi, Jing Liu, Chunfeng Wang
Rotavirus (RV) infection causes acute, watery dehydrating diarrhea and even death in infants and other young animals, resulting in a severe economic burden; however, little is known about the innate immune mechanisms associated with RV infection. Dendritic cells (DCs), which are professional antigen-presenting cells (APCs), serve as a bridge connecting the innate and adaptive immune system. In this study, the interaction between murine bone marrow-derived DCs (BMDCs) and porcine rotavirus (PRV) was investigated in vitro...
July 12, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28708582/tumor-specific-hepatic-stellate-cells-thscs-induces-digr2-expression-in-dendritic-cells-to-inhibit-t-cells
#3
Yun-Hong Xia, Zhen Lu, Min Zhao, Wen-Ting Dai, Lu Ding, Li-Xia Hu, Guo-Lin Jiang
Tumor-specific hepatic stellate cells (tHSCs) contributes to tumorigenesis and progression of hepatocellular carcinoma (HCC). The potential function of tHSCs on dendritic cells (DCs) was studied here. We discovered that tHSCs co-culture induced upregulation of DIgR2 (dendritic cell-derived immunoglobulin receptor 2) in bone marrow-derived DCs (mDCs). Activation of MEK-ERK is required for DIgR2 expression in mDCs. MEK-ERK inhibitors or shRNA-mediated silence of MEK1/2 in mDCs inhibited tHSCs-induced DIgR2 expression...
July 5, 2017: Oncotarget
https://www.readbyqxmd.com/read/28707376/immunosenescence-induced-by-plasma-from-individuals-with-obesity-caused-cell-signaling-dysfunction-and-inflammation
#4
Mariana Migliorini Parisi, Lucas Kich Grun, Patrícia Lavandoski, Letícia Biscaino Alves, Ivi Juliana Bristot, Rita Mattiello, Cláudio Corá Mottin, Fábio Klamt, Marcus Herbert Jones, Alexandre Vontobel Padoin, Fátima Costa Rodrigues Guma, Florencia María Barbé-Tuana
OBJECTIVE: To evaluate the consequences of plasma from individuals with obesity on parameters associated with immunosenescence in unrelated healthy peripheral blood mononuclear cells (PBMC). METHODS: Freshly isolated PBMC were incubated in media supplemented with 10% of plasma from individuals with obesity or control subjects for the first 4 hours of 24 to 120 hours of culture. RESULTS: Plasma from individuals with obesity modulated the phenotype of healthy PBMC, leading to a higher rate of apoptosis, lower amounts of phospho-γH2AX and -p53, and mitochondrial dysfunction...
July 14, 2017: Obesity
https://www.readbyqxmd.com/read/28706113/pd-l1-programmed-death-ligand-1-protects-against-experimental-intracerebral-hemorrhage-induced-brain-injury
#5
Ranran Han, Jiaying Luo, Yanchao Shi, Yang Yao, Junwei Hao
BACKGROUND AND PURPOSE: Intracerebral hemorrhage (ICH) is a neurologically destructive stroke, for which no valid treatment is available. This preclinical study examined the therapeutic effect of PD-L1 (programmed death ligand 1), a B7 family member and a ligand for both PD-1 (programmed death 1) and B7-1 (CD80), in a murine ICH model. METHODS: ICH was induced by injecting autologous blood into 252 male C57BL/6 and Rag1(-/-) mice. One hour later, ICH mice were randomly assigned to receive an intraperitoneal injection of vehicle, PD-L1, or anti-PD-L1 antibody...
July 13, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28701870/nuclear-factor-kappa-b-and-activator-protein-1-mediated-immunostimulatory-activity-of-compound-k-in-monocytes-and-macrophages
#6
Woo Seok Yang, Young-Su Yi, Donghyun Kim, Min Ho Kim, Jae Gwang Park, Eunji Kim, Sang Yeol Lee, Keejung Yoon, Jong-Hoon Kim, Junseong Park, Jae Youl Cho
BACKGROUND: Compound K (CK) is a bioactive derivative of ginsenoside Rb1 in Panax ginseng (Korean ginseng). Its biological and pharmacological activities have been studied in various disease conditions, although its immunomodulatory role in innate immunity mediated by monocytes/macrophages has been poorly understood. In this study, we aimed to elucidate the regulatory role of CK on cellular events mediated by monocytes and macrophages in innate immune responses. METHODS: The immunomodulatory role of CK was explored by various immunoassays including cell-cell adhesion, fibronectin adhesion, cell migration, phagocytic uptake, costimulatory molecules, reactive oxygen species production, luciferase activity, and by the measurement of mRNA levels of proinflammatory genes...
July 2017: Journal of Ginseng Research
https://www.readbyqxmd.com/read/28701589/dlgr2-knockdown-boosts-dendritic-cell-activity-and-inhibits-hepatocellular-carcinoma-tumor-in-situ-growth
#7
Zhen Lu, Yun-Hong Xia, Min Zhao, Bing Zhang, Wen-Ting Dai, Lu Ding, Li-Xia Hu, Jin-Ling Bi, Guo-Lin Jiang
Tumor-specific hepatic stellate cells (tHSCs) positively participate in human hepatocellular carcinoma (HCC) tumorigenesis and progression. Our previous studies have shown that tHSCs co-culture with dendritic cells (DCs) induced DIgR2 (dendritic cell-derived immunoglobulin receptor 2) expression. The latter is a member of IgSF inhibitory receptor suppressing DCs-initiated antigen-specific T-cell responses. In the current study, we show that hepatic artery injection of DlgR2 siRNA significantly inhibited in-situ HCC xenograft growth in rat livers...
July 5, 2017: Oncotarget
https://www.readbyqxmd.com/read/28693553/interaction-between-saliva-s-adenosine-and-tick-parasitism-effects-on-feeding-and-reproduction
#8
Elen Anatriello, Carlo José Freire Oliveira, Nathália Baptista Oliveira, Andressa Fisch, Cristiane Maria Milanezi, João Santana da Silva, Isabel Kinney Ferreira de Miranda-Santos, Beatriz Rossetti Ferreira
BACKGROUND: It has recently been demonstrated that saliva from Rhipicephalus sanguineus ticks contains adenosine (ADO) and prostaglandin E2 (PGE2), two non-protein molecules that have significant immunomodulatory properties. These molecules can inhibit cytokine production by dendritic cells (DCs), while also reducing the expression of CD40 in these cells. However, more studies are needed for a better understanding of their participation in the feeding of ticks in vivo. This work, therefore, evaluated the importance of ADO during tick infestations...
July 10, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28687069/%C3%AE-%C3%AE-tfh-cells-promote-b-cell-maturation-and-antibody-production-in-neuroblastoma
#9
Wenjun Mou, Wei Han, Xiaoli Ma, Xiaolin Wang, Hong Qin, Wen Zhao, Xiaoya Ren, Xi Chen, Wei Yang, Haiyan Cheng, Xisi Wang, Hui Zhang, Xin Ni, Huanmin Wang, Jingang Gui
BACKGROUND: Previous studies have shown that γδ TFH cells are capable of modulating antibody production in immunized and infected mouse model. In recent studies, human γδ TFH cells are shown to contribute to the activation of humoral immunity and promote the maturation of B cells. However, little information is available on their involvement in neuroblastoma (NB) pathogenesis. RESULTS: In the present study, the frequency of γδ TFH cells in 74 NB patients was significantly higher compared with that in 60 healthy controls...
July 7, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28680379/diclofenac-inhibits-27-hydroxycholesterol-induced-differentiation-of-monocytic-cells-into-mature-dendritic-cells
#10
Yonghae Son, Bo-Young Kim, Young Chul Park, Koanhoi Kim
We investigated whether diclofenac could influence the development of antigen-presenting cells in an oxygenated cholesterol-rich environment by determining its effects on the 27-hydroxycholesterol (27OHChol)-induced differentiation of monocytic cells into mature dendritic cells (mDCs). Treatment of human THP-1 monocytic cells with diclofenac antagonized the effects of 27OHChol by attenuating dendrite formation and cell attachment and promoting endocytic function. Diclofenac inhibited the transcription and surface expression of the mDC markers of CD80, CD83, and CD88, and reduced the 27OHChol-induced elevation of surface levels of MHC class I and II molecules to the basal levels in a dose-dependent manner...
June 2017: Immune Network
https://www.readbyqxmd.com/read/28670908/effects-of-lactobacillus-rhamnosus-gg-on-the-maturation-and-differentiation-of-dendritic-cells-in-rotavirus-infected-mice
#11
Y Jiang, L Ye, Y Cui, G Yang, W Yang, J Wang, J Hu, W Gu, C Shi, H Huang, C Wang
Rotavirus-related diarrhoea is considered one of the most important diseases in field animal production. In addition to the classic vaccine strategy, a number of studies have utilised probiotics, such as Lactobacillus rhamnosus GG (LGG), to prevent rotavirus-induced diarrhoea. Although it has been partially revealed that Toll-like receptors (TLRs) are involved in the LGG-mediated protection against rotavirus infection, the details of the underlying immunologic mechanisms remain largely unknown. In this study, three-to-four-week-old female BALB/c mice were divided into three groups and orally administered phosphate buffered saline (PBS), PBS plus rotavirus or LGG plus rotavirus, respectively...
July 3, 2017: Beneficial Microbes
https://www.readbyqxmd.com/read/28648868/immune-modulating-effects-in-mouse-dendritic-cells-of-lactobacilli-and-bifidobacteria-isolated-from-individuals-following-omnivorous-vegetarian-and-vegan-diets
#12
Diomira Luongo, Lucia Treppiccione, Alida Sorrentino, Ilario Ferrocino, Silvia Turroni, Monica Gatti, Raffaella Di Cagno, Yolanda Sanz, Mauro Rossi
Lactobacilli and bifidobacteria play a primary role in modulation of gut immunity. By considering that microbiota composition depends on various factors, including diet, we asked whether functional differences could characterize faecal populations of lactobacilli and bifidobacteria isolated from individuals with different dietary habits. 155 healthy volunteers who followed omnivorous, ovo-lacto-vegetarian or vegan diets were recruited at four Italian centres (Turin, Parma, Bologna and Bari). Faecal samples were collected; lactobacilli and bifidobacteria were isolated on selective media and their immunomodulatory activity was tested in mouse dendritic cells (DCs)...
September 2017: Cytokine
https://www.readbyqxmd.com/read/28646573/interferon-%C3%AE-regulates-dendritic-cell-activation-and-migration-in-experimental-autoimmune-encephalomyelitis
#13
Leesa M Pennell, Eleanor N Fish
CD11c+ dendritic cells (DCs) exert a critical role as antigen-presenting cells in regulating pathogenic T cells in multiple sclerosis (MS). To determine whether the therapeutic benefit of interferon (IFN)-β treatment for MS is in part influenced by IFN regulation of DC function, we examined the immunophenotype of DCs derived from IFN-β(+/+) and IFN-β(-/-) mice using a myelin oligodendrocyte glycoprotein (MOG) peptide-induced mouse model of MS, experimental autoimmune encephalomyelitis (EAE). Our earlier work identified that IFN-β(-/-) mice exhibit earlier onset and more rapid progression of neurologic impairment compared with IFN-β(+/+) mice...
June 24, 2017: Immunology
https://www.readbyqxmd.com/read/28643244/durvalumab-first-global-approval
#14
Yahiya Y Syed
Intravenous durvalumab (Imfinzi™; AstraZeneca) is a fully human monoclonal antibody that blocks programmed cell death ligand-1 binding to its receptors (PD-1 and CD80), resulting in enhanced T-cell responses against cancer cells. The US FDA has granted durvalumab accelerated approval for the treatment of patients with locally advanced or metastatic urothelial carcinoma who have disease progression during or following platinum-containing chemotherapy, or within 12 months of neoadjuvant or adjuvant platinum-containing chemotherapy...
June 22, 2017: Drugs
https://www.readbyqxmd.com/read/28640790/microrna-155-deficiency-in-kupffer-cells-ameliorates-liver-ischemia-reperfusion-injury-in-mice
#15
Yakun Li, Dongxia Ma, Zhimin Wang, Jun Yang
BACKGROUND: MicroRNA-155 (miR-155) is known to be involved in autoimmune diseases, inflammation, and transplantation. However, its role in a warm hepatic ischemia-reperfusion (IR) model has not been fully elucidated. METHODS: Partial hepatic IR was performed in wild-type and miR-155-deficient mice treated with or without GdCl3, and then the serum transaminase concentration and histology were analyzed. Kupffer cells (KCs) were isolated from the liver after IR, and immunohistochemistry was used to evaluate activation and polarization...
July 2017: Transplantation
https://www.readbyqxmd.com/read/28640516/damp-molecular-il-33-augments-monocytic-inflammatory-storm-in-hepatitis-b-precipitated-acute-on-chronic-liver-failure
#16
Xiaoxing Du, Yu Shi, Ying Yang, Ye Yu, Guohua Lou, Fangfang Lv, Zhi Chen, Qiao Yang
BACKGROUND & AIMS: Patients with acute-on-chronic liver failure (ACLF) usually exhibit defective monocyte function and excessive systemic inflammatory response. Interleukin-33 (IL-33) acts as a danger-associated molecular pattern (DAMP) to modulate immune response. However, the role of IL-33 in regulating monocyte function during hepatitis B-precipitated ACLF (HB-ACLF) in response to lipopolisaccharide (LPS) has not been clear. METHODS: In the present study, the levels of IL-33/ST2 in blood and liver samples collected from patients with HB-ACLF, chronic hepatitis B (CHB) and normal controls and the associated of those findings with disease severity were analyzed...
June 22, 2017: Liver International: Official Journal of the International Association for the Study of the Liver
https://www.readbyqxmd.com/read/28638736/transcriptional-factor-eb-regulates-macrophage-polarization-in-the-tumor-microenvironment
#17
Liang Fang, Johnie Hodge, Fatma Saaoud, Junfeng Wang, Stephen Iwanowycz, Yuzhen Wang, Yvonne Hui, Trent D Evans, Babak Razani, Daping Fan
Tumor microenvironment (TME) contains a variety of infiltrating immune cells. Among them, tumor-associated macrophages (TAMs) and their alternative activation contribute greatly to the progression of tumors. The mechanisms governing macrophage polarization in the TME are unclear. Here, we show that in TAMs or macrophages under tumor-conditioned medium treatment, the expression of transcription factor EB (TFEB) is reduced and more of the TFEB protein is in an inactive cytosolic form. Transforming growth factor (TGF)-β is identified as a main driving force for the reduced TFEB expression and activity in TAMs via activating ERK signaling...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28634588/antitumor-effect-of-kml-b-treated-dendritic-cells-via-induction-of-lymphocyte-activation
#18
Jong-Jin Kim, Yun-Ho Hwang, Kyung-Yun Kang, Sung-Ju Lee, Jong-Bae Kim, Jina Choi, Sung-Tae Yee
Lectins are carbohydrate-binding proteins with various biological activities, such as antitumor and immunomodulatory effects. Although lectins have various biological activities, they are still limited by cytotoxicity in normal cells. To overcome this problem, we used the noncytotoxic part of Korean mistletoe lectin B-chain (KML-B) to induce maturation of dendritic cells (DCs). A previous study reported that KML-B induces DC maturation by triggering TLR-4, including expression of costimulatory molecules (CD40, CD80, and CD86), MHC II, and secretion of cytokines in DCs...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28634420/characterization-of-the-proinflammatory-profile-of-synovial-fluid-derived-exosomes-of-patients-with-osteoarthritis
#19
Rossana Domenis, Rossella Zanutel, Federica Caponnetto, Barbara Toffoletto, Adriana Cifù, Cinzia Pistis, Paolo Di Benedetto, Araldo Causero, Massimo Pozzi, Fabrizio Bassini, Martina Fabris, Kayvan R Niazi, Patrick Soon-Shiong, Francesco Curcio
The purpose of this study is to characterize synovial fluid- (SF-) derived exosomes of patients with gonarthrosis comparing two methods of isolation and to investigate their immune regulatory properties. Extracellular vesicles (EVs) have been isolated from inflamed SF by polymer precipitation method and quantified by Exocet kit and by nanoparticle tracking analysis. Vesicles expressed all the specific exosomal markers by immunoblot and FACS. After isolation with Exoquick, a relevant contamination by immune complexes was detected, which required further magnetic bead-based purification to remove...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/28631301/prevention-of-lupus-nephritis-development-in-nzb-nzw-mice-by-selective-blockade-of-cd28
#20
Laetitia Laurent, Awena Lefur, Rozenn Le Bloas, Mélanie Néel, Caroline Mary, Anne Moreau, Nicolas Poirier, Bernard Vanhove, Fadi Fakhouri
Systemic Lupus Erythematosus (SLE) is a chronic systemic inflammatory disease. Autoantibodies (autoAbs) against double-stranded DNA (ds DNA), the hallmark of lupus, are produced and maintained by the interaction between auto-reactive B cells and CD4(+) T cells. This interplay is controlled by the CD28/CD80-86/CTLA-4 axis. Here we investigated whether selective blockade of CD28-CD80/86 co-stimulatory interactions abrogates lupus nephritis development in a murine model of SLE. To this aim, NZB/NZW F1 mice were treated for 3 months, either with an anti-CD28 Fab' fragment or a control Fab'-IgG...
June 20, 2017: European Journal of Immunology
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