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https://www.readbyqxmd.com/read/27910164/hplc-uv-and-lc-ms-analyses-of-acylquinic-acids-in-geigeria-alata-dc-oliv-hiern-and-their-contribution-to-antioxidant-and-antimicrobial-capacity
#1
Dimitrina Zheleva-Dimitrova, Reneta Gevrenova, Maya M Zaharieva, Hristo Najdenski, Silviya Ruseva, Valentin Lozanov, Vessela Balabanova, Sakina Yagi, Georgi Momekov, Vanio Mitev
INTRODUCTION: Geigeria alata is a traditional plant used in Sudanese folk medicine for treatment of diabetes, cough, epilepsy and intestinal complaints. OBJECTIVE: To analyze phenolic acids in Geigeria alata roots and leaves and to evaluate their antioxidant and antimicrobial activities. METHODOLOGY: Phenolic acids in the aqueous-methanol extracts were identified by LC-MS. Major compounds were isolated using low-pressure liquid chromatography...
December 1, 2016: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/27905296/a-pathogenic-role-for-the-integrin-cd103-in-experimental-allergic-airways-disease
#2
Vanessa S Fear, Siew Ping Lai, Graeme R Zosky, Kara L Perks, Shelley Gorman, Fabian Blank, Christophe von Garnier, Philip A Stumbles, Deborah H Strickland
The integrin CD103 is the αE chain of integrin αEβ7 that is important in the maintenance of intraepithelial lymphocytes and recruitment of T cells and dendritic cells (DC) to mucosal surfaces. The role of CD103 in intestinal immune homeostasis has been well described, however, its role in allergic airway inflammation is less well understood. In this study, we used an ovalbumin (OVA)-induced, CD103-knockout (KO) BALB/c mouse model of experimental allergic airways disease (EAAD) to investigate the role of CD103 in disease expression, CD4(+) T-cell activation and DC activation and function in airways and lymph nodes...
November 2016: Physiological Reports
https://www.readbyqxmd.com/read/27904106/fatal-hemorrhagic-gastrointestinal-angioectasia-after-bone-marrow-transplantation-for-dyskeratosis-congenita
#3
Jin Imai, Takayoshi Suzuki, Marie Yoshikawa, Makiko Dekiden, Hirohiko Nakae, Fumio Nakahara, Shingo Tsuda, Hajime Mizukami, Jun Koike, Muneki Igarashi, Hiromasa Yabe, Tetsuya Mine
Dyskeratosis congenita (DC) is a rare inherited disease in which the telomere complex cannot be maintained. Shortened telomeres can cause a number of clinical conditions. We herein report a case of unrelated bone marrow transplantation due to aplastic anemia associated with DC. The patient died of uncontrollable refractory intestinal bleeding. Three cases of DC with life-threatening hemorrhaging after transplantation have been reported; however, the bleeding origin could not be determined. Our case is the only patient in which a gastrointestinal bleeding point, jejunal multiple angioectasia, was determined...
2016: Internal Medicine
https://www.readbyqxmd.com/read/27898740/kluyveromyces-marxianus-and-saccharomyces-boulardii-induce-distinct-levels-of-dendritic-cell-cytokine-secretion-and-significantly-different-t-cell-responses-in-vitro
#4
Ida M Smith, Adam Baker, Jeffrey E Christensen, Teun Boekhout, Hanne Frøkiær, Nils Arneborg, Lene Jespersen
Interactions between members of the intestinal microbiota and the mucosal immune system can significantly impact human health, and in this context, fungi and food-related yeasts are known to influence intestinal inflammation through direct interactions with specialized immune cells in vivo. The aim of the present study was to characterize the immune modulating properties of the food-related yeast Kluyveromyces marxianus in terms of adaptive immune responses indicating inflammation versus tolerance and to explore the mechanisms behind the observed responses...
2016: PloS One
https://www.readbyqxmd.com/read/27890914/dendritic-cell-migration-in-health-and-disease
#5
Tim Worbs, Swantje I Hammerschmidt, Reinhold Förster
Dendritic cells (DCs) are potent and versatile antigen-presenting cells, and their ability to migrate is key for the initiation of protective pro-inflammatory as well as tolerogenic immune responses. Recent comprehensive studies have highlighted the importance of DC migration in the maintenance of immune surveillance and tissue homeostasis, and also in the pathogenesis of a range of diseases. In this Review, we summarize the anatomical, cellular and molecular factors that regulate the migration of different DC subsets in health and disease...
November 28, 2016: Nature Reviews. Immunology
https://www.readbyqxmd.com/read/27874963/study-on-the-functions-and-mechanism-of-immune-functions-of-human-telomerase-reverse-transcriptase-regulating-dendritic-cells-treating-sepsis
#6
H-M Chen, L-Q Wang, H-P Wan, H-Z Wei, L-C Ke, C-Y Liu, Q-Y Tan
OBJECTIVE: We analyzed the functions and mechanisms of immune functions of human telomerase reverse transcriptase regulating dendritic cells (DC) treating sepsis of mice models. MATERIALS AND METHODS: Eighty clean grade Balb/c animals aged from 6 to 8 weeks, weighted from 18 g to 22 g were selected for this study. The DC cells were harvested from the animals and cultivated to transfect with the recombinant eukaryotic expression plasmid hTERT-IRES2-EGFP construct...
November 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/27861999/forkhead-box-protein-3-foxp3-producing-dendritic-cells-suppress-allergic-response
#7
Xiao-Yu Liu, Ling-Zhi Xu, Xiang-Qian Luo, Xiao-Rui Geng, Zhi-Qiang Liu, Li-Teng Yang, Gui Yang, Si Chen, Zhi-Gang Liu, Hua-Bin Li, Li-Tao Yang, Tian-Gang Luan, Ping-Chang Yang
BACKGROUND: The generation of the tolerogenic dendritic cells (DC) is not fully understood yet. Forkhead box protein-3 (Foxp3) is an important molecule in the immune tolerance. This study tests a hypothesis that DCs express Foxp3, which can be up regulated by Staphylococcal enterotoxin B (SEB). METHODS: The expression of Foxp3 by DCs was evaluated by real time RT-PCR, Western blotting, flow cytometry and chromatin immunoprecipitation assay. RESULTS: We observed that mice treated with SEB at 0...
November 15, 2016: Allergy
https://www.readbyqxmd.com/read/27783947/inflammatory-th1-and-th17-in-the-intestine-are-each-driven-by-functionally-specialized-dendritic-cells-with-distinct-requirements-for-myd88
#8
Jie Liang, Hsin-I Huang, Fernanda P Benzatti, Amelia B Karlsson, Junyi J Zhang, Nourhan Youssef, Averil Ma, Laura P Hale, Gianna E Hammer
Normal dynamics between microbiota and dendritic cells (DCs) support modest numbers of T cells, yet these do not cause inflammation. The DCs that induce inflammatory T cells and the signals that drive this process remain unclear. Here, we demonstrate that small intestine DCs lacking the signaling attenuator A20 induce inflammatory T cells and that the signals perceived and antigen-presenting cell (APC) functions are unique for different DC subsets. Thus, although CD103(+)CD11b(-) DCs exclusively instruct IFNγ(+) T cells, CD103(+)CD11b(+) DCs exclusively instruct IL-17(+) T cells...
October 25, 2016: Cell Reports
https://www.readbyqxmd.com/read/27782111/inflammatory-cues-enhance-tgf%C3%AE-activation-by-distinct-subsets-of-human-intestinal-dendritic-cells-via-integrin-%C3%AE-v%C3%AE-8
#9
T M Fenton, A Kelly, E E Shuttleworth, C Smedley, A Atakilit, F Powrie, S Campbell, S L Nishimura, D Sheppard, S Levison, J J Worthington, M J Lehtinen, M A Travis
Regulation of intestinal T-cell responses is crucial for immune homeostasis and prevention of inflammatory bowel disease (IBD). A vital cytokine in regulating intestinal T cells is transforming growth factor-β (TGFβ), which is secreted by cells as a latent complex that requires activation to function. However, how TGFβ activation is regulated in the human intestine, and how such pathways are altered in IBD is completely unknown. Here we show that a key activator of TGFβ, integrin αvβ8, is highly expressed on human intestinal dendritic cells (DCs), specifically on the CD1c(+) but not the CD141(+) intestinal DC subset...
October 26, 2016: Mucosal Immunology
https://www.readbyqxmd.com/read/27712029/high-serum-lipopolysaccharide-binding-protein-is-associated-with-increased-mortality-in-patients-with-decompensated-cirrhosis
#10
Danai Agiasotelli, Alexandra Alexopoulou, Larisa Vasilieva, Emilia Hadziyannis, Dimitris Goukos, George L Daikos, Spyros P Dourakis
BACKGROUND/AIMS: Lipopolysaccharide-binding-protein (LBP) is an acute-phase-protein produced by hepatocytes. Changes in LBP are associated with the dynamics of bacterial translocation and intestinal permeability in decompensated cirrhosis (DC). We assessed serum and ascitic-fluid (AF) LBP and examined their association with mortality in patients with DC. METHODS: Eighty-eight consecutive patients (73.9% males) underwent thorough diagnostic investigations for infection...
October 6, 2016: Liver International: Official Journal of the International Association for the Study of the Liver
https://www.readbyqxmd.com/read/27671676/modulation-of-immune-checkpoints-and-graft-versus-leukemia-in-allogeneic-transplants-by-antagonizing-vasoactive-intestinal-peptide-signaling
#11
Jian-Ming Li, Christopher T Petersen, Jing-Xia Li, Reema Panjwani, Daniel J Chandra, Cynthia R Giver, Bruce R Blazar, Edmund K Waller
The goal of allogeneic bone marrow transplantation (allo-BMT) is elimination of leukemia cells through the graft-versus-leukemia (GvL) activity of donor cells, while limiting graft-versus-host disease (GvHD). Immune checkpoint pathways regulate GvL and GvHD activities, but blocking antibodies or genetic inactivation of these pathways can cause lethal GVHD. Vasoactive intestinal peptide (VIP) is an immunosuppressive neuropeptide that regulates coinhibitory pathways; its role in allo-BMT has not been studied...
December 1, 2016: Cancer Research
https://www.readbyqxmd.com/read/27600308/intestinal-batf3-dependent-dendritic-cells-are-required-for-optimal-antiviral-t-cell-responses-in-adult-and-neonatal-mice
#12
T Sun, O L Rojas, C Li, L A Ward, D J Philpott, J L Gommerman
Although we know a great deal about which types of dendritic cells (DCs) promote T-cell priming in the periphery, less is known about which DC subset(s) provoke antiviral responses within the gut. Here we report that conventional Zbtb46-dependent DCs were critically required for antiviral CD8(+) T-cell responses against rotavirus (RV), the major cause of childhood gastroenteritis worldwide. Furthermore, we found that in adult mice, Batf3-dependent DCs were required for generating optimal RV-specific CD8(+) T-cell responses...
September 7, 2016: Mucosal Immunology
https://www.readbyqxmd.com/read/27559049/downregulation-of-the-syk-signaling-pathway-in-intestinal-dendritic-cells-is-sufficient-to-induce-dendritic-cells-that-inhibit-colitis
#13
Long Hang, Arthur M Blum, Sangeeta Kumar, Joseph F Urban, Makedonka Mitreva, Timothy G Geary, Armando Jardim, Mary M Stevenson, Clifford A Lowell, Joel V Weinstock
Helminthic infections modulate host immunity and may protect people in less-developed countries from developing immunological diseases. In a murine colitis model, the helminth Heligmosomoides polygyrus bakeri prevents colitis via induction of regulatory dendritic cells (DCs). The mechanism driving the development of these regulatory DCs is unexplored. There is decreased expression of the intracellular signaling pathway spleen tyrosine kinase (Syk) in intestinal DCs from H. polygyrus bakeri-infected mice. To explore the importance of this observation, it was shown that intestinal DCs from DC-specific Syk(-/-) mice were powerful inhibitors of murine colitis, suggesting that loss of Syk was sufficient to convert these cells into their regulatory phenotype...
October 1, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27559003/p2x7-receptor-dependent-tuning-of-gut-epithelial-responses-to-infection
#14
Szu-Wei Huang, Catherine Walker, Joanne Pennock, Kathryn Else, Werner Muller, Michael J D Daniels, Carolina Pellegrini, David Brough, Gloria Lopez-Castejon, Sheena M Cruickshank
Infection and injury of the gut are associated with cell damage and release of molecules such as extracellular ATP which is recognised by the purinergic P2X7 receptor (P2X7R). P2X7R is widely expressed in the gut by antigen presenting cells (APC) and epithelial cells, but the role of the P2X7R on epithelial cells is poorly understood. We investigated P2X7R in intestinal epithelium in vitro and in vivo using two model infections- Toxoplasma gondii and Trichinella spiralis. LPS and ATP treatment of intestinal epithelial cells and infection with T...
August 25, 2016: Immunology and Cell Biology
https://www.readbyqxmd.com/read/27556858/dendritic-cell-derived-nitric-oxide-inhibits-the-differentiation-of-effector-dendritic-cells
#15
Chuanping Si, Ruihua Zhang, Tianshu Wu, Geming Lu, Yuan Hu, Hui Zhang, Feihong Xu, Peter Wei, Kang Chen, Hua Tang, Garabet Yeretssian, Huabao Xiong
Dendritic cells (DCs) play a pivotal role in the development of effective immune defense while avoiding detrimental inflammation and autoimmunity by regulating the balance of adaptive immunity and immune tolerance. However, the mechanisms that govern the effector and regulatory functions of DCs are incompletely understood. Here, we show that DC-derived nitric oxide (NO) controls the balance of effector and regulatory DC differentiation. Mice deficient in the NO-producing enzyme inducible nitric oxide synthase (iNOS) harbored increased effector DCs that produced interleukin-12, tumor necrosis factor (TNF) and IL-6 but normal numbers of regulatory DCs that expressed IL-10 and programmed cell death-1 (PD-1)...
August 18, 2016: Oncotarget
https://www.readbyqxmd.com/read/27547767/effects-of-adoptive-transfer-of-tolerogenic-dendritic-cells-on-allograft-survival-in-organ-transplantation-models-an-overview-of-systematic-reviews
#16
REVIEW
Yanni Zhou, Juan Shan, Yingjia Guo, Shengfu Li, Dan Long, Youping Li, Li Feng
Objective. To dissect the efficacy of Tol-DC therapy with or without IS in multiple animal models of transplantation. Methods and Results. PubMed, Medline, Embase, and the Cochrane Library were searched for reviews published up to April 2015. Six systematic reviews and a total of 61 articles were finally included. Data were grouped by organ transplantation models and applied to meta-analysis. Our meta-analysis shows that Tol-DC therapy successfully prolonged allograft survival to varying extents in all except the islet transplantation models and with IS drugs further prolonged the survival of heart, skin, and islet allografts in mice, but not of heart allografts in rats...
2016: Journal of Immunology Research
https://www.readbyqxmd.com/read/27545506/enhancing-a-wnt-telomere-feedback-loop-restores-intestinal-stem-cell-function-in-a-human-organotypic-model-of-dyskeratosis-congenita
#17
Dong-Hun Woo, Qijun Chen, Ting-Lin B Yang, M Rebecca Glineburg, Carla Hoge, Nicolae A Leu, F Brad Johnson, Christopher J Lengner
Patients with dyskeratosis congenita (DC) suffer from stem cell failure in highly proliferative tissues, including the intestinal epithelium. Few therapeutic options exist for this disorder, and patients are treated primarily with bone marrow transplantation to restore hematopoietic function. Here, we generate isogenic DC patient and disease allele-corrected intestinal tissue using clustered regularly interspaced short palindromic repeats (CRISPR)/Cas9-mediated gene correction in induced pluripotent stem cells and directed differentiation...
September 1, 2016: Cell Stem Cell
https://www.readbyqxmd.com/read/27479657/analysis-and-purification-of-mouse-intestinal-dendritic-cell-and-macrophage-subsets-by-flow-cytometry
#18
Balázs Koscsó, Milena Bogunovic
The unit presents a method for analysis of intestinal dendritic cell (DC) and macrophage subsets by flow cytometry in the single cell suspension prepared from the mouse small and large intestine (Basic Protocol). describes a strategy to enrich the hematopoietic cell fraction in the sample by Percoll gradient centrifugation, and describes preparation of single cell suspensions from specific tissue layers of the small intestine, such as the epithelium, villi mucosa, submucosa, and muscularis externa. Finally, Support Protocol explains how to purify specific intestinal DC and macrophage subsets by flow-cytometry-based cell sorting...
2016: Current Protocols in Immunology
https://www.readbyqxmd.com/read/27457183/escherichia-coli-nissle-1917-protects-gnotobiotic-pigs-against-human-rotavirus-by-modulating-pdc-and-nk-cell-responses
#19
Anastasia N Vlasova, Lulu Shao, Sukumar Kandasamy, David D Fischer, Abdul Rauf, Stephanie N Langel, Kuldeep S Chattha, Anand Kumar, Huang-Chi Huang, Gireesh Rajashekara, Linda J Saif
Lactobacillus rhamnosus GG (LGG), a gram-positive lactic acid bacterium, is one of the most widely used probiotics; while fewer gram-negative probiotics including Escherichia coli Nissle 1917 (EcN) are characterized. A mechanistic understanding of their individual and interactive effects on human rotavirus (HRV) and immunity is lacking. In this study, noncolonized, EcN-, LGG-, and EcN + LGG-colonized neonatal gnotobiotic (Gn) pigs were challenged with HRV. EcN colonization is associated with a greater protection against HRV, and induces the highest frequencies of plasmacytoid dendritic cells (pDCs), significantly increased NK-cell function and decreased frequencies of apoptotic and TLR4(+) mononuclear cells (MNCs)...
October 2016: European Journal of Immunology
https://www.readbyqxmd.com/read/27435376/intestinal-anti-inflammatory-effect-of-the-rhizome-extracts-of-menispermum-dauricum-dc-on-trinitrobenzene-sulfonic-acid-induced-ulcerative-colitis-in-mice
#20
Qi Su, Jiao He, Ziye Wang, Le Lv, Yuan Suo, Jingjing Wang, Zongwei Zheng, Chuanchuan Huo, Jing Li
ETHNOPHARMACOLOGICAL RELEVANCE: Menispermum dauricum DC., commonly known as "Bei Dou Gen" (BDG) in China, has been used extensively in folk medicine to treat inflammatory diseases, especially intestinal inflammations such as enteritis and dysentery, and in pharyngitis, tonsillitis, rheumatism and bronchitis. Although previous studies showed that BDG has anti-inflammatory activities, its effects on ulcerative colitis (UC) have not yet been explored. AIM OF THE STUDY: To investigate the intestinal anti-inflammatory effect of the rhizome extracts of Menispermum dauricum DC...
July 16, 2016: Journal of Ethnopharmacology
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