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https://www.readbyqxmd.com/read/28526573/transcriptomic-variation-of-locally-infected-skin-of-epinephelus-coioides-reveals-the-mucosal-immune-mechanism-against-cryptocaryon-irritans
#1
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 16, 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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
https://www.readbyqxmd.com/read/28424693/human-melanoma-derived-extracellular-vesicles-regulate-dendritic-cell-maturation
#12
Rachel L G Maus, James W Jakub, Wendy K Nevala, Trace A Christensen, Klara Noble-Orcutt, Zohar Sachs, Tina J Hieken, Svetomir N Markovic
Evolution of melanoma from a primary tumor to widespread metastasis is crucially dependent on lymphatic spread. The mechanisms regulating the initial step in metastatic dissemination via regional lymph nodes remain largely unknown; however, evidence supporting the establishment of a pre-metastatic niche is evolving. We have previously described a dysfunctional immune profile including reduced expression of dendritic cell (DC) maturation markers in the first node draining from the primary tumor, the sentinel lymph node (SLN)...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28424285/equine-arteritis-virus-has-specific-tropism-for-stromal-cells-and-cd8-t-and-cd21-b-lymphocytes-but-not-glandular-epithelium-at-the-primary-site-of-persistent-infection-in-the-stallion-reproductive-tract
#13
Mariano Carossino, Alan T Loynachan, Igor F Canisso, R Frank Cook, Juliana R Campos, Bora Nam, Yun Young Go, Edward L Squires, Mats H T Troedsson, Thomas Swerczek, Fabio Del Piero, Ernest Bailey, Peter J Timoney, Udeni B R Balasuriya
Equine arteritis virus (EAV) has a global impact on the equine industry being the causative agent of equine viral arteritis (EVA), a respiratory, systemic, and reproductive disease of equids. A distinctive feature of EAV infection is that it establishes long-term persistent infection in 10 to 70% of infected stallions (carriers). In these stallions, EAV is only detectable in the reproductive tract and viral persistence occurs despite the presence of high serum neutralizing antibodies. Carrier stallions constitute the natural reservoir of the virus as they continuously shed EAV in their semen...
April 19, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28414181/myeloid-but-not-plasmacytoid-blood-dcs-possess-th1-polarizing-and-th1-th17-recruiting-capacity-in-psoriasis
#14
Ahmad Khasawneh, Sándor Baráth, Barbara Medgyesi, Gabriella Béke, Zsolt Dajnoki, Krisztián Gáspár, Adrienn Jenei, Lilla Pogácsás, Kitti Pázmándi, János Gaál, Attila Bácsi, Andrea Szegedi, Anikó Kapitány
Psoriasis is a common inflammatory skin disease and dendritic cells (DCs) play crucial role in the development of skin inflammation. Although the characteristics of skin DCs in psoriasis are well defined, less is known about their peripheral blood precursors. Our aim was to characterize the phenotypic features as well as the cytokine and chemokine production of CD1c(+) myeloid DCs (mDCs) and plasmacytoid DCs (pDCs) in the blood samples of psoriatic patients. Blood DCs were isolated by using a magnetic separation kit, and their intracytoplasmic cytokine production and CD83/CD86 maturation/activation marker expression were investigated by 8-colour flow cytometry...
April 13, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28408901/serine-rich-repeat-adhesins-contribute-to-streptococcus-gordonii-induced-maturation-of-human-dendritic-cells
#15
Eun Byeol Ko, Sun Kyung Kim, Ho Seong Seo, Cheol-Heui Yun, Seung Hyun Han
Dendritic cells (DCs) play a pivotal role in the induction of immunity by recognition, capture, process, and presentation of antigens from infectious microbes. Streptococcus gordonii is able to cause life-threatening systemic diseases such as infective endocarditis. Serine-rich repeat (SRR) glycoproteins of S. gordonii are sialic acid-binding adhesins mediating the bacterial adherence to the host and the development of infective endocarditis. Thus, the SRR adhesins are potentially involved in the bacterial adherence to DCs and the maturation and activation of DCs required for the induction of immunity to S...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28399967/type-1-polarised-dendritic-cells-are-a-potent-immunogen-against-mycobacterium-tuberculosis
#16
Y Satake, Y Nakamura, M Kono, H Hozumi, T Nagata, K Tsujimura, N Enomoto, T Fujisawa, N Inui, T Fujiyama, Y Tokura, T Matsui, K Yokomura, M Shirai, H Hayakawa, T Suda
OBJECTIVE: Application of immunotherapy using dendritic cells (DCs) is considered an effective treatment strategy against persistent Mycobacterium tuberculosis infection. With the goal of developing improved therapeutic vaccination strategies for patients with tuberculosis (TB), we tested the ability of ex vivo-generated DCs to induce an effective TB antigen-specific type-1 immune response. METHODS: Monocyte-derived DCs from TB patients were induced to mature using a 'standard' cytokine cocktail (interleukin [IL] 1β, tumour necrosis factor alpha [TNF-α], IL-6 and prostaglandin E2) or a type 1-polarised DC (DC1) cocktail (IL-1β, TNF-α, interferon [IFN] α, IFN-γ and polyinosinic:polycytidylic acid), and were loaded with the established TB antigen 6-kDa early secretory antigenic target protein (ESAT-6)...
May 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28396662/the-role-of-dendritic-cell-maturation-in-the-induction-of-insulin-dependent-diabetes-mellitus
#17
REVIEW
Jacques C Mbongue, Hector A Nieves, Timothy W Torrez, William H R Langridge
Dendritic cells (DCs) are the dominant class of antigen-presenting cells in humans and are largely responsible for the initiation and guidance of innate and adaptive immune responses involved in maintenance of immunological homeostasis. Immature dendritic cells (iDCs) phagocytize pathogens and toxic proteins and in endosomal vesicles degrade them into small fragments for presentation on major histocompatibility complex (MHC) II receptor molecules to naïve cognate T cells (Th0). In addition to their role in stimulation of immunity, DCs are involved in the induction and maintenance of immune tolerance toward self-antigens...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28395713/-immature-dendritic-cells-phagocytosing-human-spleen-cells-treated-by-puva-present-the-characteristics-of-regulatory-dendritic-cells
#18
Shaozhen Yang, Guosheng Du, Yuxiang Wei, Longlong Suo, Lin Zhou, Likui Feng, Jiyong Song, Zhidong Zhu, Yonggen Zheng
Objective To investigate the effect of psoralen combined with A-band ultraviolet (PUVA)-treated human spleen lymphocytes on the phenotype and function of immature dendritic cells (imDCs). Methods Human peripheral blood mononuclear cells (PBMCs) were isolated and induced to produce DCs by interleukin-4 (IL-4) and recombinant human granulocyte macrophage colony stimulating factor (rhGM-CSF). On the sixth day, the imDCs were obtained and stimulated by lipopolysaccharide (LPS). One day later, mature DCs were harvested...
April 2017: Xi Bao Yu Fen Zi Mian Yi Xue za Zhi, Chinese Journal of Cellular and Molecular Immunology
https://www.readbyqxmd.com/read/28368498/the-antigen-presenting-potential-of-v%C3%AE-9v%C3%AE-2-t-cells-during-plasmodium-falciparum-blood-stage-infection
#19
Jennifer Howard, Séverine Loizon, Christopher J Tyler, Dorothée Duluc, Bernhard Moser, Matthieu Mechain, Alexandre Duvignaud, Denis Malvy, Marita Troye-Blomberg, Jean-Francois Moreau, Matthias Eberl, Odile Mercereau-Puijalon, Julie Déchanet-Merville, Charlotte Behr, Maria Mamani-Matsuda
During Plasmodium falciparum infections, erythrocyte-stage parasites inhibit dendritic cell maturation and function; compromising development of effective anti-malarial adaptive immunity. Human Vγ9Vδ2 T-cells can act in vitro as APCs and induce αβ T-cell activation. However, the relevance of this activity in pathophysiological contexts in vivo has remained elusive. Since Vγ9Vδ2 T-cells are activated during the early immune response against P.falciparum infection, we investigated whether they could contribute to the instruction of adaptive immune responses toward malaria parasites...
March 27, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28341814/the-effect-of-monophosphoryl-lipid-a-on-maturation-of-dcs-from-patients-with-acute-myeloid-leukaemia
#20
COMPARATIVE STUDY
Noha Mohamed El Husseiny, Walaa Abd El Fattah Attya Elkak, Mervat Said El Ansary, Engy Mohamed Abd El Aziz El Khateeb, Mervat Wagih Mattar, Doaa Mohamed El Demerdash
BACKGROUND: Generation of monocyte-derived dendritic cells (MDDC) is induced in the presence of GM-CSF and IL-4, and a maturation stimulus is added to the monocyte culture to obtain mature Dendritic Cells (DCs) suitable for therapy. TNF-α is the most common cytokine used for activating DCs and generating mature MDDC either alone or in combination with other cytokines. OBJECTIVE: To compare effects of traditional cytokine cocktail (TNF-α + IL-1β) versus TLR4-agonist monophosphoryl lipid A on the viability, phenotype, cytokine profile and functionality of MDDC...
March 2017: Iranian Journal of Immunology: IJI
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