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https://www.readbyqxmd.com/read/28630103/up-regulation-of-ep2-and-ep3-receptors-in-human-tolerogenic-dendritic-cells-boost-the-immunosuppressive-activity-of-pge2
#1
Georgina Flórez-Grau, Raquel Cabezón, Kyra J E Borgman, Carolina España, Juan Jose Lozano, Maria F Garcia-Parajo, Daniel Benítez-Ribas
Dendritic cells (DCs) are APCs essential in regulating the immune response. PGE2, produced during inflammation, has a pivotal role in the maturation of DCs and, therefore, is vital for the immune response. The large variety of biologic functions governed by PGE2 is mediated by its signaling through 4 distinct E-type prostanoid (EP) receptors. Immunogenic DCs express EP2 and EP4, which mediate the PGE2 signaling. However, the expression and function of EP receptors in human tolerogenic DCs (tol-DCs), which present an inhibitory phenotype, have not yet, to our knowledge, been assessed...
June 19, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28603864/ediii-denv3-nanospheres-drive-immature-dendritic-cells-into-a-mature-phenotype-in-an-in-vitro-model
#2
Nattika Nantachit, Panya Sunintaboon, Sukathida Ubol
Domain III of E protein of DENV is one of the targets for vaccine development. Unfortunately, this protein-based platform has generally low immunogenicity. To circumvent this problem, we investigated the use of an adjuvant-nanoparticle delivery system to facilitate immunogenicity of soluble DENV-EDIII protein. One of the key features of this delivery system is its ability to simultaneously deliver antigens and exert adjuvanticity to specialized immune cells. In this study, we generated N-trimethyl chitosan (TMC) nanoparticles (NPs) to be used as adjuvant and carrier for the soluble E-domain III of dengue virus serotype 3 (sEDIII-D3)...
June 12, 2017: Microbiology and Immunology
https://www.readbyqxmd.com/read/28597963/mir-181a-and-mir-150-regulate-dendritic-cell-immune-inflammatory-responses-and-cardiomyocyte-apoptosis-via-targeting-jak1-stat1-c-fos-pathway
#3
Jianbing Zhu, Kang Yao, Junjie Guo, Hongtao Shi, Leilei Ma, Qian Wang, Haibo Liu, Wei Gao, Aijun Sun, Yunzeng Zou, Junbo Ge
The immune inflammatory response plays a crucial role in many cardiac pathophysiological processes, including ischaemic cardiac injury and the post-infarction repair process. MicroRNAs (miRNAs) regulate the development and function of dendritic cells (DCs), which are key players in the initiation and regulation of immune responses; however, the underlying regulatory mechanisms remain unclear. Here, we used the supernatants of necrotic primary cardiomyocytes (Necrotic-S) to mimic the myocardial infarction (MI) microenvironment to investigate the role of miRNAs in the regulation of DC-mediated inflammatory responses...
June 9, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28589429/influence-of-ovarian-cancer-type-i-and-type-ii-microenvironment-on-the-phenotype-and-function-of-monocyte-derived-dendritic-cells
#4
J Surówka, I Wertel, K Okła, W Bednarek, R Tarkowski, J Kotarski
PURPOSE: The aim of this study was to evaluate the influence of ovarian cancer cell lysates isolated from type I or type II ovarian cancer (OC) on the phenotype of monocyte-derived dendritic cells (Mo-DCs) and the cytokine profile. We also determined whether the Mo-DCs and tumor microenvironment, reflected by peritoneal fluid (PF) from type I or II ovarian cancer, could promote regulatory T cell (Tregs) differentiation from naive CD4(+) lymphocytes in vitro. RESULTS: Our results show a significant role of the ovarian cancer microenvironment reflected by PF from type I or II OC in the inhibition of the DC differentiation process...
June 6, 2017: Clinical & Translational Oncology
https://www.readbyqxmd.com/read/28586072/treatment-of-colon-cancer-cells-with-5-fluorouracil-can-improve-the-effectiveness-of-rna-transfected-antitumor-dendritic-cell-vaccine
#5
Carolina V De Almeida, Jofer A Zamame, Graziela G Romagnoli, Cecilia P Rodrigues, Marianna B Magalhães, Amedeo Amedei, Ramon Kaneno
Non-cytotoxic concentrations of selected chemotherapeutic agents amplify the antigen presentation capacity of dendritic cells (DCs) and are able to increase the immunogenicity of the colon cancer cell lineage HCT‑116, as previously demonstrated by our group. Since this functional alteration was associated with changes in gene expression, we aimed to evaluate whether transcriptional changes of tumor cells can be transferred to DCs, increasing their ability to induce a specific antitumor response. Therefore, HCT‑116 cells were treated with two different concentrations of 5-fluorouracil (5-FU), and their total RNA was transfected into human monocyte-derived DC, which function was evaluated through their ability to stimulate the proliferation of normal allogeneic T lymphocytes (MLR), and to generate cytolytic T cells...
June 1, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28585308/immunosurveillance-profile-of-oral-squamous-cell-carcinoma-and-oral-epithelial-dysplasia-through-dendritic-and-t-cells-analysis
#6
Ana Carolina Amorim Pellicioli, Lynne Bingle, Paula Farthing, Márcio Ajudarte Lopes, Manoela Domingues Martins, Pablo Agustin Vargas
Oral squamous cell carcinomas (OSCC) can arise from potentially malignant disorders, such as leukoplakia. The immune system plays an important role recognizing tumour precursor cells. However, due to immunoediting mechanisms cancer cells are able to escape immune system surveillance. OBJECTIVE: Evaluate the profile of dendritic (Langerhans and plasmacytoid) and T cells in OSCC and oral epithelial dysplasia (OED) and correlate these findings with clinical data. MATERIALS AND METHODS: Fifty cases of OSCC and 48 of OED were immunostained for CD1a and CD83 dendritic Langerhans cells (DLC), plasmacytoid dendritic cells (pDC) CD303 and CD8 followed by quantitative analysis...
June 5, 2017: Journal of Oral Pathology & Medicine
https://www.readbyqxmd.com/read/28579524/characterization-and-expression-analysis-of-grouper-epinephelus-coioides-co-stimulatory-molecules-cd83-and-cd80-86-post-cryptocaryon-irritans-infection
#7
Ze-Quan Mo, Jiu-Le Wang, Man Yang, Lu-Yun Ni, Hai-Qing Wang, Guo-Feng Lao, Yan-Wei Li, An-Xing Li, Xiao-Chun Luo, Xue-Ming Dan
Co-stimulatory molecules (CD83, CD80 and CD86), belong to immunoglobulin superfamily, are type I membrane glycoprotein, which express on antigen presenting cells and provide the second signal for the activation of T lymphocytes. In the present study, we cloned the grouper's CD83 (675 bp) and CD80/86 (876 bp). Homology analysis showed that both EcCD83 and EcCD80/86 shares the highest amino acid similarity (51% and 47%) for the overall sequence with puffer fish (Takifugu rubripes). Some conserved features and important functional residues in mammalian CD83, CD80 and CD86 were also identified from these molecules of teleosts including grouper, suggesting the function of both molecules may be conserved among vertebrates...
June 1, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28554713/different-capacity-of-in-vitro-generated-myeloid-dendritic-cells-of-newborns-of-healthy-and-allergic-mothers-to-respond-to-probiotic-strain-e-coli-o83-k24-h31
#8
Lenka Súkeníková, Viktor Černý, Olga Novotná, Petra Petrásková, Kristýna Boráková, Libuše Kolářová, Ludmila Prokešová, Jiří Hrdý
Allergic diseases belong to one of the most common diseases with steadily increasing incidence even among young children. There is an urgent need to identify a prognostic marker pointing to increased risk of allergy development enabling early preventive measures introduction. It has been shown that administration of selected probiotic strains or mixtures could prevent allergy development. In our study, we have tested the capacity of probiotic strain Escherichia coli O83:K24:H31 (E. coli O83) to promote dendritic cell (DC) maturation and polarisation of immune responses...
May 26, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28534275/sex-bias-in-pathogenesis-of-autoimmune-neuroinflammation-relevance-for-dimethyl-fumarate-immunomodulatory-anti-oxidant-action
#9
Zorica Stojić-Vukanić, Jelena Kotur-Stevuljević, Mirjana Nacka-Aleksić, Duško Kosec, Ivana Vujnović, Ivan Pilipović, Mirjana Dimitrijević, Gordana Leposavić
In the present study, upon showing sexual dimorphism in dimethyl fumarate (DMF) efficacy to moderate the clinical severity of experimental autoimmune encephalomyelitis (EAE) in Dark Agouti rats, cellular and molecular substrate of this dimorphism was explored. In rats of both sexes, DMF administration from the day of immunization attenuated EAE severity, but this effect was more prominent in males leading to loss of the sexual dimorphism observed in vehicle-administered controls. Consistently, in male rats, DMF was more efficient in diminishing the number of CD4+ T lymphocytes infiltrating spinal cord (SC) and their reactivation, the number of IL-17+ T lymphocytes and particularly cellularity of their highly pathogenic IFN-γ+GM-CSF+IL-17+ subset...
May 22, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28526573/transcriptomic-variation-of-locally-infected-skin-of-epinephelus-coioides-reveals-the-mucosal-immune-mechanism-against-cryptocaryon-irritans
#10
Yazhou Hu, Anxing Li, Yang Xu, Biao Jiang, Geling Lu, Xiaochun Luo
Fish skin is the largest immunologically active mucosal organ, providing first-line defense against external pathogens. However, the skin-associated immune mechanisms of fish are still unclear. Cryptocaryon irritans is an obligate ectoparasitic ciliated protozoan that infects almost all marine fish, and is believed to be an excellent pathogen model to study fish mucosal immunity. In this study, a de novo transcriptome assembly of Epinephelus coioides skin post C. irritans tail-infection was performed for the first time using the Illumina HiSeq™ 2500 system...
May 17, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28515281/cxcl4-exposure-potentiates-tlr-driven-polarization-of-human-monocyte-derived-dendritic-cells-and-increases-stimulation-of-t-cells
#11
Sandra C Silva-Cardoso, Alsya J Affandi, Lotte Spel, Marta Cossu, Joel A G van Roon, Marianne Boes, Timothy R D J Radstake
Chemokines have been shown to play immune-modulatory functions unrelated to steering cell migration. CXCL4 is a chemokine abundantly produced by activated platelets and immune cells. Increased levels of circulating CXCL4 are associated with immune-mediated conditions, including systemic sclerosis. Considering the central role of dendritic cells (DCs) in immune activation, in this article we addressed the effect of CXCL4 on the phenotype and function of monocyte-derived DCs (moDCs). To this end, we compared innate and adaptive immune responses of moDCs with those that were differentiated in the presence of CXCL4...
May 17, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28507543/long-term-monocyte-dysfunction-after-sepsis-in-humanized-mice-is-related-to-persisted-activation-of-macrophage-colony-stimulation-factor-m-csf-and-demethylation-of-pu-1-and-it-can-be-reversed-by-blocking-m-csf-in-vitro-or-by-transplanting-na%C3%A3-ve-autologous
#12
Natalia Lapko, Mateusz Zawadka, Jacek Polosak, George S Worthen, Gwenn Danet-Desnoyers, Monika Puzianowska-Kuźnicka, Krzysztof Laudanski
The duration of post-sepsis long-term immune suppression is poorly understood. Here, we focused on the role of monocytes (MO) as the pivotal cells for long-term regulation of post-sepsis milieu. Lost ability of MO to adapt is seen in several acute conditions, but it is unclear for how long MO aberrancy post-sepsis can persist. Interestingly, the positive feedback loop sustaining secretion of macrophage-colony stimulation factor (M-CSF) can persist even after resolution of sepsis and significantly alters performance of MO...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28503991/platelet-concentrates-modulate-myeloid-dendritic-cell-immune-responses
#13
Katrina K Ki, Helen M Faddy, Robert L Flower, Melinda M Dean
Platelet transfusion has been reported to modulate the recipients' immune system. To date, the precise mechanism(s) driving poor patient outcomes (e.g., increased rate of mortality, morbidity, infectious complications and prolonged hospital stays) following platelet transfusion are largely undefined. To determine the potential for platelet concentrates (PC) to modulate responses of crucial immune regulatory cells, a human in vitro whole blood model of transfusion was established. Maturation and activation of human myeloid dendritic cells (mDC) and the specialized subset blood DC antigen (BDCA)3(+) DC were assessed following exposure to buffy-coat derived PC at day (D)2 (fresh) and D5 (date-of-expiry)...
May 15, 2017: Platelets
https://www.readbyqxmd.com/read/28491062/a-kinetic-study-of-cd83-reveals-an-upregulation-and-higher-production-of-scd83-in-lymphocytes-from-pregnant-mice
#14
Katrin Regina Helene Packhäuser, Gleyder Roman-Sosa, Jens Ehrhardt, Diana Krüger, Marek Zygmunt, Damián Oscar Muzzio
For the normal development of pregnancy, a balance between immune tolerance and defense is crucial. However, the mechanisms mediating such a balance are not fully understood. CD83 is a transmembrane protein whose expression has been linked to anti-inflammatory functions of T and B cells. The soluble form of CD83, released by cleavage of the membrane-bound protein, has strong anti-inflammatory properties and was successfully tested in different mouse models. It is assumed that this molecule contributes to the establishment of immune tolerance...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28463985/palmitic-acid-is-a-toll-like-receptor-4-ligand-that-induces-human-dendritic-cell-secretion-of-il-1%C3%AE
#15
Dequina A Nicholas, Kangling Zhang, Christopher Hung, Shane Glasgow, Aruni Wilson Aruni, Juli Unternaehrer, Kimberly J Payne, William H R Langridge, Marino De Leon
Palmitic acid (PA) and other saturated fatty acids are known to stimulate pro-inflammatory responses in human immune cells via Toll-like receptor 4 (TLR4). However, the molecular mechanism responsible for fatty acid stimulation of TLR4 remains unknown. Here, we demonstrate that PA functions as a ligand for TLR4 on human monocyte derived dendritic cells (MoDCs). Hydrophobicity protein modeling indicated PA can associate with the hydrophobic binding pocket of TLR4 adaptor protein MD-2. Isothermal titration calorimetry quantified heat absorption that occurred during PA titration into TLR4/MD2, indicating that PA binds to TLR4/MD2...
2017: PloS One
https://www.readbyqxmd.com/read/28461772/pi3k-and-erk-signaling-pathways-are-involved-in-differentiation-of-monocytic-cells-induced-by-27-hydroxycholesterol
#16
Yonghae Son, Bo-Young Kim, Young Chul Park, Seong-Kug Eo, Hyok-Rae Cho, Koanhoi Kim
27-Hydroxycholesterol induces differentiation of monocytic cells into mature dendritic cells, mDCs. In the current study we sought to determine roles of the PI3K and the ERK pathways in the 27OHChol-induced differentiation. Up-regulation of mDC-specific markers like CD80, CD83 and CD88 induced by stimulation with 27OHChol was significantly reduced in the presence of LY294002, an inhibitor of PI3K, and U0126, an inhibitor of ERK. Surface expression of MHC class I and II molecules elevated by 27OHChol was decreased to basal levels in the presence of the inhibitors...
May 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28456624/fusion-proteins-of-flagellin-and-the-major-birch-pollen-allergen-bet-v-1-show-enhanced-immunogenicity-reduced-allergenicity-and-intrinsic-adjuvanticity
#17
Claudia Kitzmüller, Julia Kalser, Sonja Mutschlechner, Michael Hauser, Gerhard J Zlabinger, Fatima Ferreira, Barbara Bohle
BACKGROUND: Recombinant fusion proteins of flagellin and antigens have been demonstrated to induce strong innate and adaptive immune responses. Such fusion proteins may enhance the efficacy of allergen-specific immunotherapy (AIT). OBJECTIVE: To characterize different fusion proteins of flagellin and the major birch pollen allergen Bet v 1 for suitability as allergy vaccines. METHODS: A truncated version of flagellin (NtCFlg) was genetically fused to the N- or C-terminus of Bet v 1...
April 26, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28454394/variation-and-significance-of-secretory-immunoglobulin-a-interleukin-6-and-dendritic-cells-in-oral-cancer
#18
Suxin Zhang, Xin Zhang, Ke Yin, Tianke Li, Yang Bao, Zhong Chen
The present study aimed to determine changes in the concentration of secretory immunoglobulin A (SIgA) and interleukin 6 (IL-6) in the saliva of patients with oral cancer, to evaluate the abnormal expression of cluster of differentiation (CD) 1a, CD83, CD80 and CD86 on dendritic cells (DCs) of oral cancer tissues and to discuss the interaction between SIgA, IL-6 and DCs in oral cancer. A total of 40 patients between 27 and 70 years of age, median age 52 years, with primary oral cancer were enrolled in the present study, and a group of 20 healthy male and female volunteers was used as the control group...
April 2017: Oncology Letters
https://www.readbyqxmd.com/read/28451557/efficacy-and-safety-of-g2013-as-a-novel-immunosuppressive-agent-on-differentiation-maturation-and-function-of-human-dendritic-cells
#19
Nazanin Arjomand Fard, Nakisa Tabrizian, Reza Mirzaei, Jamshid Hadjati, Farzaneh Tofighi Zavareh, Ali Reza Salehi Nodeh, Abbas Mirshafiey
BACKGROUND: The expanse of dendritic cells (DC) differentiation plays an important role in determining immune response. DC-based immunosuppressive drugs have notable side effects in increasing the risk of infectious diseases and cancers. G2013, as a novel anti-inflammatory and immunosuppressive agent, has been tested in experimental model of multiple sclerosis. The aim of this study was to conduct the safety property of G2013 on dendritic cells biology. METHODS: The effect of G2013 on differentiation, maturation, and function of dendritic cells was examined at Tehran University in 2014...
February 2017: Iranian Journal of Public Health
https://www.readbyqxmd.com/read/28445638/antigenic-gm3-lactone-mimetic-molecule-integrated-mannosylated-glycopeptide-nanofibers-for-the-activation-and-maturation-of-dendritic-cells
#20
Gokhan Gunay, Melis Sardan Ekiz, Xhenti Ferhati, Barbara Richichi, Cristina Nativi, Ayse B Tekinay, Mustafa O Guler
The ability of dendritic cells to coordinate innate and adaptive immune responses makes them essential targets for vaccination strategies. Presentation of specific antigens by dendritic cells is required for the activation of the immune system against many pathogens and tumors, and nanoscale materials can be functionalized for active targeting of dendritic cells. In this work, we integrated an immunogenic, carbohydrate melanoma-associated antigen-mimetic GM3-lactone molecule into mannosylated peptide amphiphile nanofibers to target dendritic cells through DC-SIGN receptor...
May 3, 2017: ACS Applied Materials & Interfaces
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