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https://www.readbyqxmd.com/read/29908907/modulation-of-human-th17-cell-responses-through-complement-receptor-3-cd11-b-cd18-ligation-on-monocyte-derived-dendritic-cells
#1
Johannes Nowatzky, Olivier Manches, Shaukat Ali Khan, Emmanuelle Godefroy, Nina Bhardwaj
OBJECTIVE: Apoptotic cell receptors contribute to the induction of tolerance by modulating dendritic cell function following the uptake of apoptotic cells or microparticles. Dendritic cells that have bound or ingested apoptotic cells produce only low amounts of pro-inflammatory cytokines and fail to prime effector T cell responses. Specifically, ligation of the apoptotic cell receptor CR3 (CD11 b/CD18) on human monocyte-derived dendritic cells (moDC) down-modates proinflammatory cytokine secretion, but the consequences for human Th17 cell homeostasis and effector responses remain unknown...
June 13, 2018: Journal of Autoimmunity
https://www.readbyqxmd.com/read/29894981/synthesis-characterization-and-applications-of-maghemite-beads-functionalized-with-rabbit-antibodies
#2
Anselmo Rodriguez, Caroline Rocha, Rodolfo Piazza, Caio Santos, Marco Morales, Fernando Faria, Zubair Iqbal, Lucas Barbosa, Yuri Chaves, Luis Mariuba, Miguel Jafelicci, Rodrigo Marques
Magnetic nanoparticles (nps) have attracted great attention owing of their applications in biomedical field. In present work, maghemite nps (γFe2O3) were prepared by sonochemical method and further functionalized with APTS via silanization reaction. Subsequently, amino group in APTS-Fe2O3 beads were converted to carboxylic acid (CARB-Fe2O3) through succinic anhydride reaction, as confirmed by Fourier transform infrared spectroscopy and Zeta potential measurements. The beads have spherical shape with diameter of 7 nm as determined by X-ray powder diffraction and transmission electron microscopy...
June 12, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29861605/impact-of-5-fu-oxaliplatin-on-mouse-dendritic-cells-and-synergetic-effect-with-a-colon-cancer-vaccine
#3
Xinqiang Hong, Tiangeng Dong, Tuo Yi, Jianwei Hu, Zhen Zhang, Shengli Lin, Weixin Niu
Objective: The aim of the present study was to investigate the effects of 5-fluorouracil (5-Fu) and oxaliplatin on the function and activation pathways of mouse dendritic cells (DCs), and to clarify whether 5-Fu/oxaliplatin combined with the CD1d-MC38/α-galactosylceramide (α-GC) tumor vaccine exhibits synergistic effects on the treatment of colon cancer in mice. Methods: The combination of the Toll like receptor (TLR) ligands and/or 5-Fu/oxaliplatin was added into myeloid-derived DCs in vitro culture...
April 2018: Chinese Journal of Cancer Research, Chung-kuo Yen Cheng Yen Chiu
https://www.readbyqxmd.com/read/29608161/isolation-of-dendritic-cells-from-the-human-female-reproductive-tract-for-phenotypical-and-functional-studies
#4
Marta Rodriguez-Garcia, Jared M Fortier, Fiona D Barr, Charles R Wira
The characterization of the human dendritic cells (DCs) resident in mucosal tissues is challenging due to the difficulty in obtaining samples, and the low numbers of DCs present per tissue. Yet, as the phenotype and function of DCs is modified by the tissue environment, it is necessary to analyze tissue resident DC populations, since blood derived DCs incompletely reflect the complexities of DCs in tissues. Here we present a protocol to isolate DCs from the human female reproductive tract (FRT) using hysterectomy specimens that allows both phenotypical and functional analyses...
March 13, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29581197/tumor-necrosis-factor-alpha-antagonism-reveals-a-gut-lung-axis-that-amplifies-regulatory-t-cells-in-a-pulmonary-fungal-infection
#5
Jamie L Tweedle, George S Deepe
Tumor necrosis factor (TNF) antagonists are popular therapies for inflammatory diseases. These agents enhance the numbers and function of regulatory T cells (Tregs), which are important in controlling inflammatory diseases. However, elevated Treg levels increase susceptibility to infections, including histoplasmosis. We determined the mechanism by which Tregs expand in TNF-neutralized mice infected with Histoplasma capsulatum Lung CD11c+ CD11b+ dendritic cells (DCs), but not alveolar macrophages, from H. capsulatum -infected mice treated with anti-TNF induced a higher percentage of Tregs than control DCs in vitro CD11b+ CD103+ DCs, understood to be unique to the intestines, were augmented in lungs with anti-TNF treatment...
June 2018: Infection and Immunity
https://www.readbyqxmd.com/read/29434732/sustained-multiple-organ-ischaemia-after-transarterial-chemoembolization-with-drug-eluting-beads-for-hepatocellular-carcinoma
#6
Young Woon Kim, Jung Hyun Kwon, Soon Woo Nam, Jeong Won Jang, Hyun Suk Jung, Yu Ri Shin, Eun Su Park, Dong Jae Shim
Transarterial chemoembolization (TACE) with drug-eluting beads (DC beads) may enhance drug delivery to tumours and reduce systemic toxicity. TACE with DC beads leads to significantly fewer serious side-effects compared with conventional TACE. A 66-year-old man with hepatocellular carcinoma (HCC) complained of continuous abdominal pain 1 month after TACE with DC beads. At the time of TACE, angiography revealed severe stenosis of both hepatic arteries. The diagnostic work up on admission suggested severe bile duct injury with regional bile duct dilatation, segmental liver and spleen infarction, necrotizing pancreatitis, as well as gastric and duodenal ulcers...
February 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29288585/enhanced-cell-trapping-throughput-using-dc-biased-ac-electric-field-in-a-dielectrophoresis-based-fluidic-device-with-densely-packed-silica-beads
#7
Nuttawut Lewpiriyawong, Guolin Xu, Chun Yang
This paper presents the use of DC-biased AC electric field for enhancing cell trapping throughput in an insulator-based dielectrophoretic (iDEP) fluidic device with densely packed silica beads. Cell suspension is carried through the iDEP device by a pressure-driven flow. Under an applied DC-biased AC electric field, DEP trapping force is produced as a result of non-uniform electric field induced by the gap of electrically insulating silica beads packed between two mesh electrodes that allow both fluid and cells to pass through...
March 2018: Electrophoresis
https://www.readbyqxmd.com/read/29128714/multiplex-immunoassays-using-virus-tethered-gold-microspheres-by-dc-impedance-based-flow-cytometry
#8
Jihun Rho, Woohyuk Jang, Inseong Hwang, Dahye Lee, Chang Heon Lee, Taek Dong Chung
Bead-based multiplex immunoassays for common use require enhanced sensitivity and effective prevention of non-specific adsorption, as well as miniaturization of the detection device. In this work, we have implemented virus-tethered gold microspheres for multiplex immunoassay applications, employing a DC impedance-based flow cytometer as a detection element. The advantages of virus-tethered gold microspheres, including excellent prevention of non-specific adsorption, are extended to signal enhancement arising from the large quantity of antibody loading on each virion, and to flexible movement of filamentous virus...
April 15, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29063780/transarterial-chemoembolization-with-dc-bead-lumi%C3%A2-radiopaque-beads-for-primary-liver-cancer-treatment-preliminary-experience
#9
Camillo Aliberti, Riccardo Carandina, Donatella Sarti, Enrico Pizzirani, Gaetano Ramondo, Umberto Cillo, Stefano Guadagni, Giammaria Fiorentini
AIM: Primary objectives of the study were to assess the safety of transarterial chemoembolization (TACE) using DC Bead LUMI™ for the treatment of hepatocellular carcinoma and beads distribution after TACE. PATIENTS/METHODS: This was a prospective observational cohort study. The study included 44 hepatocellular carcinoma patients who were treated with TACE using DC Bead LUMI. Beads distribution was monitored 1 h after TACE by CT scan. RESULTS: TACE had no intraprocedural complications...
October 24, 2017: Future Oncology
https://www.readbyqxmd.com/read/29044495/urban-particulate-matter-stimulation-of-human-dendritic-cells-enhances-priming-of-naive-cd8-t-lymphocytes
#10
Paul E Pfeffer, Tzer R Ho, Elizabeth H Mann, Frank J Kelly, Maria Sehlstedt, Jamshid Pourazar, Rosamund E Dove, Thomas Sandstrom, Ian S Mudway, Catherine M Hawrylowicz
Epidemiological studies have consistently shown associations between elevated concentrations of urban particulate matter (UPM) air pollution and exacerbations of asthma and chronic obstructive pulmonary disease, which are both associated with viral respiratory infections. The effects of UPM on dendritic cell (DC) -stimulated CD4 T lymphocytes have been investigated previously, but little work has focused on CD8 T-lymphocyte responses despite their importance in anti-viral immunity. To address this, we examined the effects of UPM on DC-stimulated naive CD8 T-cell responses...
April 2018: Immunology
https://www.readbyqxmd.com/read/29027077/optimization-of-dendritic-cell-mediated-cytotoxic-t-cell-activation-by-tracking-of-dendritic-cell-migration-using-reporter-gene-imaging
#11
Hongje Lee, Ho Won Lee, You La Lee, Yong Hyun Jeon, Shin Young Jeong, Sang-Woo Lee, Jaetae Lee, Byeong-Cheol Ahn
PURPOSE: The aim of this study is to optimize the dendritic cell (DC)-mediated T-cell activation using reporter gene imaging and flow cytometric analysis in living mice. PROCEDURES: A murine dendritic cell line (DC2.4) co-expressing effluc and Thy1.1 genes were established by transfection with retroviral vectors. Thy1.1 positive cells were sorted by magnetic bead separation system (DC2.4/effluc). Cell proliferation assay and phenotype analysis to determine the effects of gene transduction on the function of dendritic cells between parental DC2...
June 2018: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/28978449/quantitative-deformability-cytometry-rapid-calibrated-measurements-of-cell-mechanical-properties
#12
Kendra D Nyberg, Kenneth H Hu, Sara H Kleinman, Damir B Khismatullin, Manish J Butte, Amy C Rowat
Advances in methods that determine cell mechanical phenotype, or mechanotype, have demonstrated the utility of biophysical markers in clinical and research applications ranging from cancer diagnosis to stem cell enrichment. Here, we introduce quantitative deformability cytometry (q-DC), a method for rapid, calibrated, single-cell mechanotyping. We track changes in cell shape as cells deform into microfluidic constrictions, and we calibrate the mechanical stresses using gel beads. We observe that time-dependent strain follows power-law rheology, enabling single-cell measurements of apparent elastic modulus, Ea , and power-law exponent, β...
October 3, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28967606/differentiation-of-human-dendritic-cell-subsets-for-immune-tolerance-induction
#13
N Deluce-Kakwata-Nkor, L Lamendour, V Chabot, A Héraud, Z Ivanovic, F Halary, F Dehaut, F Velge-Roussel
OBJECTIVES: Since no further progress was achieved, in order to improve the long-term organ transplantation outcome, the immune tolerance appears as an interesting therapeutic goal. Dendritic cells (DCs) are specialized cells participating in the homeostasis of the immune response. Moreover, subsets of DCs, identified in humans, appear to have their respective competences in immune response modulation. Our objective is to purify from PBMC or to differentiate DC subsets from monocytes using several strategies and evaluate their IL10 secretion...
February 2018: Transfusion Clinique et Biologique: Journal de la Société Française de Transfusion Sanguine
https://www.readbyqxmd.com/read/28923503/in-vivo-confocal-microscopy-detects-bilateral-changes-of-corneal-immune-cells-and-nerves-in-unilateral-herpes-zoster-ophthalmicus
#14
Bernardo M Cavalcanti, Andrea Cruzat, Afsun Sahin, Deborah Pavan-Langston, Eric Samayoa, Pedram Hamrah
PURPOSE: To analyze bilateral corneal immune cell and nerve alterations in patients with unilateral herpes zoster ophthalmicus (HZO) by laser in vivo confocal microscopy (IVCM) and their correlation with corneal sensation and clinical findings. MATERIALS AND METHODS: This is a prospective, cross-sectional, controlled, single-center study. Twenty-four eyes of 24 HZO patients and their contralateral clinically unaffected eyes and normal controls (n = 24) were included...
January 2018: Ocular Surface
https://www.readbyqxmd.com/read/28865229/cytokine-profiles-of-dendritic-cells-dcs-during-infection-with-bovine-leukaemia-virus-blv
#15
E Iwan, M Szczotka, J Kocki
BLV is an agent of enzootic bovine leukaemia (EBL), an infectious disease affecting cattle worldwide. BLV infection has been associated with immune system disorders and discrepancies in the cytokine network. The significance of dendritic cells in the pathogenesis of BLV infection is largely unknown, but considering their fundamental role in immune response it may be crucial. DCs precursors were isolated with the use of immunomagnetic beads from BLV-infected and BLV-free cows. From these precursors cultures of monocyte derived dendritic cells (MoDCs) were generated with the use of a cytokine cocktail (IL-4 and GM-CSF)...
March 1, 2017: Polish Journal of Veterinary Sciences
https://www.readbyqxmd.com/read/28791124/combining-dendritic-cells-and-b-cells-for-presentation-of-oxidised-tumour-antigens-to-cd8-t-cells
#16
Melanie L Grant, Nicholas Shields, Silke Neumann, Katrin Kramer, Andrea Bonato, Christopher Jackson, Margaret A Baird, Sarah L Young
The dendritic cell (DC) is the foremost antigen-presenting cell (APC) for ex vivo expansion of tumour-specific patient T cells. Despite marked responses in some patients following reinfusion of DC-activated autologous or HLA-matched donor T cells, overall response rates remain modest in solid tumours. Furthermore, most studies aim to generate immune responses against defined tumour-associated antigens (TAA), however, meta-analysis reveals that those approaches have less clinical success than those using whole tumour cells or their components...
July 2017: Clinical & Translational Immunology
https://www.readbyqxmd.com/read/28774159/comparison-of-changes-in-the-interstitial-cells-of-cajal-and-neuronal-nitric-oxide-synthase-positive-neuronal-cells-with-aging-between-the-ascending-and-descending-colon-of-f344-rats
#17
Sun Min Lee, Nayoung Kim, Hyun Jin Jo, Ji Hyun Park, Ryoung Hee Nam, Hye Seung Lee, Hyun Jin Kim, Moon Young Lee, Yong Sung Kim, Dong Ho Lee
Background/Aims: Neuronal degeneration and changes in interstitial cells of Cajal (ICCs) are important mechanisms of age-related constipation. This study aims to compare the distribution of ICCs and neuronal nitric oxide synthase (nNOS) with regard to age-related changes between the ascending colon (AC) and descending colon (DC) in 6-, 31-, and 74-week old and 2-year old male Fischer-344 rats. Methods: The amount of fecal pellet and the bead expulsion times were measured...
October 30, 2017: Journal of Neurogastroenterology and Motility
https://www.readbyqxmd.com/read/28733242/dual-centrifugation-a-new-technique-for-nanomilling-of-poorly-soluble-drugs-and-formulation-screening-by-an-doe-approach
#18
Martin Hagedorn, Ansgar Bögershausen, Matthias Rischer, Rolf Schubert, Ulrich Massing
The development of nanosuspensions of poorly soluble APIs takes a lot of time and high amount of active material is needed. In this publication the use of dual centrifugation (DC) for an effective and rapid API-nanomilling is described for the first time. DC differs from normal centrifugation by an additional rotation of the samples during centrifugation, resulting in a very fast and powerful movement of the samples inside the vials, which - in combination with milling beads - result in effective milling. DC-nanomilling was compared to conventional wet ball milling and results in same or even smaller particle sizes...
September 15, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28719632/viscum-album-neutralizes-tumor-induced-immunosuppression-in-a-human-in-vitro-cell-model
#19
Carmen Steinborn, Amy Marisa Klemd, Ann-Sophie Sanchez-Campillo, Sophie Rieger, Marieke Scheffen, Barbara Sauer, Manuel Garcia-Käufer, Konrad Urech, Marie Follo, Annekathrin Ücker, Gunver Sophia Kienle, Roman Huber, Carsten Gründemann
Tumor cells have the capacity to secrete immunosuppressive substances in order to diminish dendritic cell (DC) activity and thereby escape from immune responses. The impact of mistletoe (Viscum album) extracts (VAE), which are frequently used as an additive anti-cancer therapy to stimulate the immune response, is still unknown. Using a human cellular system, the impact of two different VAE (VAEA + VAEI) on the maturation of human dendritic cells and on T cell function has been investigated using flow cytometry, automated fluorescence microscopy and cytokine bead array assays...
2017: PloS One
https://www.readbyqxmd.com/read/28679130/efficacy-of-2-month-treatment-with-cord-blood-serum-eye-drops-in-ocular-surface-disease-an-in-vivo-confocal-microscopy-study
#20
Giuseppe Giannaccare, Marina Buzzi, Michela Fresina, Claudio Velati, Piera Versura
PURPOSE: To investigate the morphological changes of corneal epithelium and subbasal nerves by in vivo confocal microscopy in patients with ocular surface disease (OSD) treated with cord blood serum (CBS) eye drops. METHODS: Twenty patients with OSD (mean age 61.1 ± 12.6 years) were included in this prospective 1-arm study and treated with CBS eye drops for 2 months. Corneal sensitivity, Schirmer test score, breakup time, subjective symptoms [Ocular Surface Disease Index (OSDI) and Visual Analogue Scale (VAS)], and corneal staining were evaluated before (T0) and after (T1) treatment...
August 2017: Cornea
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