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plasmacytoid dendritic cells

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https://www.readbyqxmd.com/read/29019365/blueberry-supplementation-attenuates-oxidative-stress-within-monocytes-and-modulates-immune-cell-levels-in-adults-with-metabolic-syndrome-a-randomized-double-blind-placebo-controlled-trial
#1
Anand R Nair, Nithya Mariappan, April J Stull, Joseph Francis
BACKGROUND: Blueberries (BB) have been shown to improve insulin sensitivity and endothelial function in obese and pre-diabetic humans, and decrease oxidative stress and inflammation, and ameliorate cardio-renal damage in rodents. This indicates that blueberries have a systemic effect and are not limited to a particular organ system. In order for blueberries to exert beneficial effects on the whole body, the mechanism would logically have to operate through modulation of cellular humoral factors...
October 11, 2017: Food & Function
https://www.readbyqxmd.com/read/28988508/immunological-effects-of-everolimus-in-patients-with-metastatic-renal-cell-cancer
#2
Charlotte M Huijts, Saskia J Santegoets, Tamarah D de Jong, Henk M Verheul, Tanja D de Gruijl, Hans J van der Vliet
The mammalian target of rapamycin (mTOR) is a crucial kinase present in all cells. Besides its role in the regulation of cell-growth, proliferation, angiogenesis, and survival of malignant tumors, mTOR additionally plays an important role in immune regulation by controlling the balance between effector T cells and regulatory T cells (Tregs). This critically affects the suppressive state of the immune system. Here, the systemic immunological effects of everolimus treatment were comprehensively investigated in five patients with metastatic renal cell cancer...
October 1, 2017: International Journal of Immunopathology and Pharmacology
https://www.readbyqxmd.com/read/28987803/long-acting-%C3%AE-2-adrenoreceptor-agonists-suppress-type-1-interferon-expression-in-human-plasmacytoid-dendritic-cells-via-epigenetic-regulation
#3
Chang-Hung Kuo, San-Nan Yang, Yi-Giien Tsai, Chong-Chao Hsieh, Wei-Ting Liao, Li-Chen Chen, Min-Sheng Lee, Hsuan-Fu Kuo, Ching-Hsiung Lin, Chih-Hsing Hung
The combination of inhaled long-acting β2-adrenoreceptor (LABA) and inhaled glucocorticoid (ICS) is a major therapy for asthma. However, the increased risk of infection is still a concern. Plasmacytoid dendritic cells (pDCs) are the predominant cells producing type 1 interferon (IFN) against infection. The effect of LABA/ICS on type 1 IFN expression in human pDCs is unknown. Circulating pDCs were isolated from healthy human subjects and were pretreated with glucocorticoid (GCS), LABA or a cAMP analog, and were stimulated with Toll-like receptor (TLR) agonist CpG (TLR9) or imiquimod (TLR7) in the presence of IL-3...
October 4, 2017: Pulmonary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28980314/haematopoietic-cell-transplantation-for-blastic-plasmacytoid-dendritic-cell-neoplasm-a-north-american-multicentre-collaborative-study
#4
Mohamed A Kharfan-Dabaja, Monzr M Al Malki, Uday Deotare, Renju V Raj, Najla El-Jurdi, Navneet Majhail, Mohamad A Cherry, Qaiser Bashir, Justin Darrah, Taiga Nishihori, Hassan Sibai, Mehdi Hamadani, Marcos de Lima, Aaron T Gerds, George Selby, Muzaffar H Qazilbash, Stephen J Forman, Ernesto Ayala, Jeffrey H Lipton, Parameswaran N Hari, Tariq Muzzafar, Ling Zhang, Horatiu Olteanu, Janelle Perkins, Lubomir Sokol, Ambuj Kumar, Sairah Ahmed
Blastic plasmacytoid dendritic cell neoplasm (BPDCN) is incurable with conventional therapies. Limited retrospective data have shown durable remissions after haematopoietic cell transplantation (HCT) [allogeneic (allo) or autologous (auto)]. We conducted a multicentre retrospective study in BPDCN patients treated with allo-HCT and auto-HCT at 8 centres in the United States and Canada. Primary endpoint was overall survival (OS). The population consisted of 45 consecutive patients who received an allo-HCT (n = 37) or an auto-HCT (n = 8) regardless of age, pre-transplant therapies, or remission status at transplantation...
October 4, 2017: British Journal of Haematology
https://www.readbyqxmd.com/read/28966462/blastic-plasmacytoid-dendritic-cell-neoplasm-following-acquired-erythropoietic-protoporphyria
#5
John R Krause, Laura Baugh, Alicia Swink, Micah Burch
A 56-year-old Texas rancher with a prior diagnosis of acquired erythropoietic protoporphyria secondary to an underlying myelodysplastic disorder developed an uncommon tumor, blastic plasmacytoid dendritic cell neoplasm (BPDCN). During his initial disease, analysis revealed a TET2 mutation, which is the most common mutation associated with BPDCN. This article discusses this unusual hematopoietic neoplasm, the possible evolution from erythropoietic protoporphyria, and the underlying myelodysplastic process.
October 2017: Proceedings of the Baylor University Medical Center
https://www.readbyqxmd.com/read/28963621/splenic-rupture-secondary-to-blastic-plasmacytoid-dendritic-cell-neoplasm
#6
Nádia Tenreiro, Cátia Ferreira, Sílvia Silva, Fernando Próspero Luís
No abstract text is available yet for this article.
September 28, 2017: Journal of Gastrointestinal Surgery: Official Journal of the Society for Surgery of the Alimentary Tract
https://www.readbyqxmd.com/read/28963110/development-diversity-and-function-of-dendritic-cells-in-mouse-and-human
#7
David A Anderson, Kenneth M Murphy, Carlos G Briseño
The study of murine dendritic cell (DC) development has been integral to the identification of specialized DC subsets that have unique requirements for their form and function. Advances in the field have also provided a framework for the identification of human DC counterparts, which appear to have conserved mechanisms of development and function. Multiple transcription factors are expressed in unique combinations that direct the development of classical DCs (cDCs), which include two major subsets known as cDC1s and cDC2s, and plasmacytoid DCs (pDCs)...
September 29, 2017: Cold Spring Harbor Perspectives in Biology
https://www.readbyqxmd.com/read/28961902/metagene-projection-characterizes-gen2-2-and-cal-1-as-relevant-human-plasmacytoid-dendritic-cell-models
#8
Pedro Carmona-Sáez, Nieves Varela, María José Luque, Daniel Toro-Domínguez, Jordi Martorell-Marugan, Marta E Alarcón-Riquelme, Concepción Marañón
Motivation: Plasmacytoid dendritic cells (pDC) play a major role in the regulation of adaptive and innate immunity. Human pDC are difficult to isolate from peripheral blood and do not survive in culture making the study of their biology challenging. Recently, two leukemic counterparts of pDC, CAL-1 and GEN2.2, have been proposed as representative models of human pDC. Nevertheless, their relationship with pDC has been established only by means of particular functional and phenotypic similarities...
August 7, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28958808/human-innate-responses-and-adjuvant-activity-of-tlr-ligands-in-vivo-in-mice-reconstituted-with-a-human-immune-system
#9
Liang Cheng, Zheng Zhang, Guangming Li, Feng Li, Li Wang, Liguo Zhang, Sandra M Zurawski, Gerard Zurawski, Yves Levy, Lishan Su
TLR ligands (TLR-Ls) represent a class of novel vaccine adjuvants. However, their immunologic effects in humans remain poorly defined in vivo. Using a humanized mouse model with a functional human immune system, we investigated how different TLR-Ls stimulated human innate immune response in vivo and their applications as vaccine adjuvants for enhancing human cellular immune response. We found that splenocytes from humanized mice showed identical responses to various TLR-Ls as human PBMCs in vitro. To our surprise, various TLR-Ls stimulated human cytokines and chemokines differently in vivo compared to that in vitro...
October 27, 2017: Vaccine
https://www.readbyqxmd.com/read/28954350/-clinical-characteristics-of-6-patients-with-blastic-plasmacytoid-dendritic-cell-neoplasm
#10
X Han, M Q Ouyang, Q Pei, M H Duan, X Y Jiang, D B Zhou
Objective: To explore the clinical characteristics, treatment, and prognosis of patients with blastic plasmacytoid dendritic cell neoplasm. Method: Clinical records of 6 patients diagnosed with blastic plasmacytoid dendritic cell neoplasm in our hospital from January 2008 to May 2016 were collected and retrospectively analyzed. Results: Six patients manifested with initial symptoms of skin lesions, other common symptoms included bone marrow involvement (5/6) , lymphadenectasis (4/6) , splenomegaly (4/6) , and hepatomegaly (3/6) ...
August 14, 2017: Zhonghua Xue Ye Xue za Zhi, Zhonghua Xueyexue Zazhi
https://www.readbyqxmd.com/read/28947612/spatially-restricted-jag1-notch-signaling-in-human-thymus-provides-suitable-dc-developmental-niches
#11
Enrique Martín-Gayo, Sara González-García, María J García-León, Alba Murcia-Ceballos, Juan Alcain, Marina García-Peydró, Luis Allende, Belén de Andrés, María L Gaspar, María L Toribio
A key unsolved question regarding the developmental origin of conventional and plasmacytoid dendritic cells (cDCs and pDCs, respectively) resident in the steady-state thymus is whether early thymic progenitors (ETPs) could escape T cell fate constraints imposed normally by a Notch-inductive microenvironment and undergo DC development. By modeling DC generation in bulk and clonal cultures, we show here that Jagged1 (JAG1)-mediated Notch signaling allows human ETPs to undertake a myeloid transcriptional program, resulting in GATA2-dependent generation of CD34(+) CD123(+) progenitors with restricted pDC, cDC, and monocyte potential, whereas Delta-like1 signaling down-regulates GATA2 and impairs myeloid development...
September 25, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28939412/th1-signatures-are-present-in-the-lower-airways-of-children-with-severe-asthma-regardless-of-allergic-status
#12
Julia A Wisniewski, Lyndsey M Muehling, Jacob D Eccles, Brian J Capaldo, Rachana Agrawal, Debbie-Ann Shirley, James T Patrie, Lisa J Workman, Alexander J Schuyler, Monica G Lawrence, W Gerald Teague, Judith A Woodfolk
BACKGROUND: The pathogenesis of severe asthma in childhood remains poorly understood. OBJECTIVE: To construct the immunological landscape in the airways of children with severe asthma. METHODS: Comprehensive analysis of multiple cell types and mediators was performed by flow cytometry and multiplex assay using bronchoalveolar lavage (BAL) specimens (n=68) from 52 highly characterized allergic and non-allergic children (0.5-17 years) with severe treatment-refractory asthma...
September 19, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28935649/melanoma-sequentially-suppresses-different-dc-subsets-in-the-sentinel-lymph-node-affecting-disease-spread-and-recurrence
#13
Mari F C M van den Hout, Bas D Koster, Berbel J R Sluijter, Barbara G Molenkamp, Rieneke van de Ven, Alfons J M van den Eertwegh, Rik J Scheper, Paul A van Leeuwen, M Petrousjka van den Tol, Tanja D de Gruijl
Melanoma exerts immune suppressive effects to facilitate tumor progression and metastatic spread. We studied these effects on dendritic cell (DC) and T-cell subsets in 36 melanoma sentinel lymph nodes (SLN) from 28 stage I-III melanoma patients and determined their clinical significance. Four conventional DC subsets; plasmacytoid DCs; and CD4+, CD8+, and regulatory T cells (Tregs) were analyzed by flow cytometry. We correlated these data to clinical parameters and determined their effect on local and distant melanoma recurrence, with a median follow-up of 75 months...
September 21, 2017: Cancer Immunology Research
https://www.readbyqxmd.com/read/28935206/tlr7-8-agonists-stimulate-plasmacytoid-dendritic-cells-to-initiate-a-th17-deviated-acute-contact-dermatitis-in-humans
#14
Natalie Garzorz-Stark, Felix Lauffer, Linda Krause, Jenny Thomas, Anne Atenhan, Regina Franz, Sophie Roenneberg, Alexander Boehner, Manja Jargosch, Richa Batra, Nikola S Mueller, Stefan Haak, Christina Groß, Olaf Groß, Claudia Traidl-Hoffmann, Fabian J Theis, Carsten B Schmidt-Weber, Tilo Biedermann, Stefanie Eyerich, Kilian Eyerich
BACKGROUND: A standardized human model to study early pathogenic events in psoriasis is missing. Activation of Toll-like receptor 7/8 by topical application of imiquimod is the most commonly used mouse model of psoriasis. OBJECTIVE: To investigate the potential of a human imiquimod patch test model to resemble human psoriasis. METHODS: Imiquimod (Aldara® 5% cream) was applied twice a week onto the back of volunteers (n=18) and the development of skin lesions was monitored over a time period of four weeks...
September 18, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28912296/exuberant-nodal-proliferation-of-mature-plasmacytoid-dendritic-cells-in-a-patient-with-chronic-myelomonocytic-leukemia
#15
Huan-You Wang, Andrew L Feldman
No abstract text is available yet for this article.
September 14, 2017: Blood
https://www.readbyqxmd.com/read/28906324/pediatric-blastic-plasmacytoid-dendritic-cell-neoplasm-a-systematic-literature-review
#16
Marie Jeong-Min Kim, Ahmed Nasr, Bilaal Kabir, Joseph de Nanassy, Ken Tang, Danielle Menzies-Toman, Donna Johnston, Dina El Demellawy
Blastic plasmacytoid dendritic cell neoplasm (BPDCN) is a rare aggressive hematologic malignancy characterized by frequent skin involvement that most commonly affects older patients. BPDCN is known to have a poor prognosis. Our objective was to assess if outcome and disease prognosis were independently influenced by age when evaluated with clinical presentation, sex, and treatment regimens. We conducted a systematic review to identify BPDCN cases, to compare pediatric BPDCN cases with adult cases. A total of 125 publications were identified detailing 356 cases...
October 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/28900681/regulatory-dendritic-cells
#17
Katsuaki Sato, Tomofumi Uto, Tomohiro Fukaya, Hideaki Takagi
Dendritic cells (DCs) comprise heterogeneous subsets, functionally classified into conventional DCs (cDCs) and plasmacytoid DCs (pDCs). DCs are considered to be essential antigen (Ag)-presenting cells (APCs) that play crucial roles in activation and fine-tuning of innate and adaptive immunity under inflammatory conditions, as well as induction of immune tolerance to maintain immune homeostasis under steady-state conditions. Furthermore, DC functions can be modified and influenced by stimulation with various extrinsic factors, such as ligands for pattern-recognition receptors (PRRs) and cytokines...
September 13, 2017: Current Topics in Microbiology and Immunology
https://www.readbyqxmd.com/read/28890720/porcine-b-cell-subset-responses-to-toll-like-receptor-ligands
#18
Roman Othmar Braun, Sylvie Python, Artur Summerfield
Toll-like receptors (TLR) triggering of B cells are known to promote B cell expansion, differentiation of B cells into antibody-producing and memory cells, but the TLR responses of porcine B cells is poorly characterized. Therefore, this study investigated the response pattern of porcine B cell subsets to a large collection of TLR ligands and demonstrates that the TLR2 ligand Pam3Cys-SK4 and the TLR7/8 ligands gardiquimod and resiquimod are particularly efficient at inducing proliferation, CD25 and CCR7. This activation was also determined in B-cell subpopulations including a CD21(+)IgM(+) subset, an IgG(+) subset and two putative B1-like subsets, defined as CD21(-)IgM(high)CD11R1(+)CD11c(+)CD14(+) and CD21(-)IgM(high) CD11R1(-)CD11c(+)CD14(-) B cells...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28889065/profiling-dendritic-cell-subsets-in-the-patients-with-active-pulmonary-tuberculosis
#19
Yuan-Bin Lu, De-Qian Xiao, Kui-Di Liang, Jun-Ai Zhang, Wan-Dang Wang, Shi-Yan Yu, Bi-Ying Zheng, Yu-Chi Gao, You-Chao Dai, Yan Jia, Chen Chen, Ze-Gang Zhuang, Xin Wang, Xiao-Xia Fu, Yong Zhou, Jixin Zhong, Zheng W Chen, Jun-Fa Xu
Dendritic cell (DC) plays an important role in the immune response against pulmonary tuberculosis. However, the phenotypic profile of DC subsets in peripheral blood in individuals with active pulmonary tuberculosis (APT) is still inconclusive. Here, we demonstrated that the absolute numbers of total DC (tDC), myeloid DC (mDC) and plasmacytoid DC (pDC) in individuals with APT were decreased compared to healthy controls (HCs). The decreased number of DCs, especially of pDC, seems to be a useful diagnostic marker of APT...
September 7, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28879716/concomitant-occurrence-of-blastic-plasmacytoid-dendritic-cell-neoplasm-and-acute-myeloid-leukaemia-after-lenalidomide-treatment-for
#20
Nicola S Fracchiolla, Alessanda Iurlo, Valeria Ferla, Bruno Fattizzo, Alessandra Freyrie, Gianluigi Reda, Agostino Cortelezzi
BACKGROUND: Myelodysplastic syndromes with chromosome 5 long arm deletion (5q-mds) may benefit from lenalidomide treatment. However, unresponsive patients have a high risk for clonal evolution and progression to acute myeloid leukemia. Case: We describe a 5q-patient treated with lenalidomide, who concomitantly developed acute myeloid leukemia and blastic plasmacytoid dendritic cell neoplasm, a rare and highly aggressive lymphoma. CONCLUSIONS: Evolution of 5q- syndrome to acute myeloid leukemia and blastic plasmacytoid dendritic cell neoplasm may have occurred through various mechanisms, including persistence of neoplastic lenalidomide-resistant stem cells and selection of a more aggressive clone via lenalidomide augmentation of the ARPC1B gene, or because of lenalidomide stimulation on dendritic cells...
September 1, 2017: Clinical Laboratory
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