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https://www.readbyqxmd.com/read/28542882/butyrate-and-retinoic-acid-synergistically-imprint-mucosal-like-dendritic-cell-development-from-bone-marrow-cells
#1
Yetao Qiang, Jie Xu, Cheng Yan, Huimin Jin, Tengfei Xiao, Nannan Yan, Liping Zhou, Huazhang An, Xiaoming Zhou, Qixiang Shao, Sheng Xia
Accumulating data show that the phenotypes and functions of distinctive mucosal dendritic cells (DCs) in the gut are regulated by retinoic acid (RA). Unfortunately, the exact role of butyrate in RA mediated mucosal DC differentiation has not been thoroughly elucidated to date. Mucosal like dendritic cell differentiation was completed in vitro by culturing bone marrow cells with growth factors (GM-CSF/IL-4), RA and/or butyrate. The phenotypes, cytokine secretion, immune functions and levels of retinal dehydrogenase of different DCs were detected using qPCR, ELISA and flow cytometry, respectively...
May 24, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28539429/bolstering-the-number-and-function-of-hsv-1-specific-cd8-effector-memory-t-cells-and-tissue-resident-memory-t-cells-in-latently-infected-trigeminal-ganglia-reduces-recurrent-ocular-herpes-infection-and-disease
#2
Arif A Khan, Ruchi Srivastava, Aziz A Chentoufi, Elizabeth Kritzer, Sravya Chilukuri, Sumit Garg, David C Yu, Hawa Vahed, Lei Huang, Sabrina A Syed, Julie N Furness, Tien T Tran, Nesburn B Anthony, Christine E McLaren, John Sidney, Alessandro Sette, Randolph J Noelle, Lbachir BenMohamed
HSV type 1 (HSV-1) is a prevalent human pathogen that infects >3.72 billion individuals worldwide and can cause potentially blinding recurrent corneal herpetic disease. HSV-1 establishes latency within sensory neurons of trigeminal ganglia (TG), and TG-resident CD8(+) T cells play a critical role in preventing its reactivation. The repertoire, phenotype, and function of protective CD8(+) T cells are unknown. Bolstering the apparent feeble numbers of CD8(+) T cells in TG remains a challenge for immunotherapeutic strategies...
May 24, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28537249/airway-t-cells-protect-against-rsv-infection-in-the-absence-of-antibody
#3
E Kinnear, L Lambert, J U McDonald, H M Cheeseman, L J Caproni, J S Tregoning
Tissue resident memory T (Trm) cells act as sentinels and early responders to infection. Respiratory syncytial virus (RSV)-specific Trm cells have been detected in the lungs after human RSV infection, but whether they have a protective role is unknown. To dissect the protective function of Trm cells, BALB/c mice were infected with RSV; infected mice developed antigen-specific CD8(+) Trm cells (CD103(+)/CD69(+)) in the lungs and airways. Intranasally transferring cells from the airways of previously infected animals to naïve animals reduced weight loss on infection in the recipient mice...
May 24, 2017: Mucosal Immunology
https://www.readbyqxmd.com/read/28533445/lung-cd4-tissue-resident-memory-t-cells-mediate-adaptive-immunity-induced-by-previous-infection-of-mice-with-bordetella-pertussis
#4
Mieszko M Wilk, Alicja Misiak, Róisín M McManus, Aideen C Allen, Marina A Lynch, Kingston H G Mills
Th1 and Th17 cells have an established role in protective immunity to Bordetella pertussis, but this evidence is based largely on peripheral T cells. There is emerging evidence that local tissue-resident memory T (TRM) cells that accumulate in tissue following mucosal infection may be crucial for long-term immunity. In this study, we examined the role of respiratory CD4 TRM cells in immunity to B. pertussis Natural immunity to B. pertussis induced by infection is considered long lasting and effective at preventing reinfection...
May 22, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28530714/cd8%C3%AE-%C3%AE-intraepithelial-lymphocytes-arise-from-two-main-thymic-precursors
#5
Roland Ruscher, Rebecca L Kummer, You Jeong Lee, Stephen C Jameson, Kristin A Hogquist
TCRαβ(+)CD4(-)CD8α(+)CD8β(-) intestinal intraepithelial lymphocytes (CD8αα IELs) are an abundant population of thymus-derived T cells that protect the gut barrier surface. We sought to better define the thymic IEL precursor (IELp) through analysis of its maturation, localization and emigration. We defined two precursor populations among TCRβ(+)CD4(-)CD8(-) thymocytes by dependence on the kinase TAK1 and rigorous lineage-exclusion criteria. Those IELp populations included a nascent PD-1(+) population and a T-bet(+) population that accumulated with age...
May 22, 2017: Nature Immunology
https://www.readbyqxmd.com/read/28526759/il-2-high-tissue-resident-t-cells-in-the-human-liver-sentinels-for-hepatotropic-infection
#6
Laura J Pallett, Jessica Davies, Emily J Colbeck, Francis Robertson, Navjyot Hansi, Nicholas J W Easom, Alice R Burton, Kerstin A Stegmann, Anna Schurich, Leo Swadling, Upkar S Gill, Victoria Male, TuVinh Luong, Amir Gander, Brian R Davidson, Patrick T F Kennedy, Mala K Maini
The liver provides a tolerogenic immune niche exploited by several highly prevalent pathogens as well as by primary and metastatic tumors. We have sampled healthy and hepatitis B virus (HBV)-infected human livers to probe for a subset of T cells specialized to overcome local constraints and mediate immunity. We characterize a population of T-bet(lo)Eomes(lo)Blimp-1(hi)Hobit(lo) T cells found within the intrahepatic but not the circulating memory CD8 T cell pool expressing liver-homing/retention markers (CD69(+)CD103(+) CXCR6(+)CXCR3(+))...
May 19, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28515363/lung-cd103-dendritic-cells-restrain-allergic-airway-inflammation-through-il-12-production
#7
Laura Conejero, Sofía C Khouili, Sarai Martínez-Cano, Helena M Izquierdo, Paola Brandi, David Sancho
DCs are necessary and sufficient for induction of allergic airway inflammation. CD11b+ DCs direct the underlying Th2 immunity, but debate surrounds the function of CD103+ DCs in lung immunity and asthma after an allergic challenge. We challenged Batf3-/- mice, which lacked lung CD103+ DCs, with the relevant allergen house dust mite (HDM) as a model to ascertain their role in asthma. We show that acute and chronic HDM exposure leads to defective Th1 immunity in Batf3-deficient mice. In addition, chronic HDM challenge in Batf3-/- mice results in increased Th2 and Th17 immune responses and exacerbated airway inflammation...
May 18, 2017: JCI Insight
https://www.readbyqxmd.com/read/28514662/a-murine-intestinal-intraepithelial-nkp46-negative-innate-lymphoid-cell-population-characterized-by-group-1-properties
#8
Aline Van Acker, Konrad Gronke, Aindrila Biswas, Liesbet Martens, Yvan Saeys, Jessica Filtjens, Sylvie Taveirne, Els Van Ammel, Tessa Kerre, Patrick Matthys, Tom Taghon, Bart Vandekerckhove, Jean Plum, Ildiko Rita Dunay, Andreas Diefenbach, Georges Leclercq
The Ly49E receptor is preferentially expressed on murine innate-like lymphocytes, such as epidermal Vγ3 T cells, intestinal intraepithelial CD8αα(+) T lymphocytes, and CD49a(+) liver natural killer (NK) cells. As the latter have recently been shown to be distinct from conventional NK cells and have innate lymphoid cell type 1 (ILC1) properties, we investigated Ly49E expression on intestinal ILC populations. Here, we show that Ly49E expression is very low on known ILC populations, but it can be used to define a previously unrecognized intraepithelial innate lymphoid population...
May 16, 2017: Cell Reports
https://www.readbyqxmd.com/read/28500076/stat5-is-required-for-cd103-dendritic-cell-and-alveolar-macrophage-development-and-protection-from-lung-injury
#9
William E Eddy, Ke-Qin Gong, Bryan Bell, William C Parks, Steven F Ziegler, Anne M Manicone
We tested the role of Stat5 in dendritic cell and alveolar macrophage (AM) homeostasis in the lung using CD11c-cre mediated deletion (Cre(+)5(f/f)). We show that Stat5 is required for CD103(+) dendritic cell and AM development. We found that fetal monocyte maturation into AMs was impaired in Cre(+)5(f/f) mice, and we also confirmed impaired AM development of progenitor cells using mixed chimera experiments. In the absence of Stat5 signaling in AMs, mice developed alveolar proteinosis with altered lipid homeostasis...
May 12, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28495789/dietary-nondigestible-oligosaccharides-and-bifidobacterium-breve-m-16v-suppress-allergic-inflammation-in-intestine-via-targeting-dendritic-cell-maturation
#10
Sander de Kivit, Atanaska I Kostadinova, JoAnn Kerperien, Mary E Morgan, Veronica Ayechu Muruzabal, Gerard A Hofman, Leon M J Knippels, Aletta D Kraneveld, Johan Garssen, Linette E M Willemsen
Dietary intervention with short-chain galacto-oligosaccharides (scGOS), long-chain fructo-oligosaccharides (lcFOS) and Bifidobacterium breve M-16V (Bb) (GF/Bb) suppresses food allergic symptoms in mice, potentially via intestinal epithelial cell (IEC)-derived galectin-9. Furthermore, in vitro studies showed galacto- and fructo-oligosaccharides (GF) to enhance the immunomodulatory capacity of a TLR9 ligand representing bacterial CpG DNA when exposed to IEC. In this study, we investigated whether GF/Bb modulates dendritic cells (DCs) and subsequent Th2 and regulatory T cell (Treg) frequency in the small intestinal lamina propria (SI-LP)...
May 11, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28486109/tumor-residing-batf3-dendritic-cells-are-required-for-effector-t-cell-trafficking-and-adoptive-t-cell-therapy
#11
Stefani Spranger, Daisy Dai, Brendan Horton, Thomas F Gajewski
Effector T cells have the capability of recognizing and killing cancer cells. However, whether tumors can become immune resistant through exclusion of effector T cells from the tumor microenvironment is not known. By using a tumor model resembling non-T cell-inflamed human tumors, we assessed whether adoptive T cell transfer might overcome failed spontaneous priming. Flow cytometric assays combined with intra-vital imaging indicated failed trafficking of effector T cells into tumors. Mechanistically, this was due to the absence of CXCL9/10, which we found to be produced by CD103(+) dendritic cells (DCs) in T cell-inflamed tumors...
May 8, 2017: Cancer Cell
https://www.readbyqxmd.com/read/28479331/forkhead-box-protein-3-foxp3-demethylation-is-associated-with-tolerance-induction-in-peanut-induced-intestinal-allergy
#12
Meiqin Wang, Ivana V Yang, Elizabeth J Davidson, Anthony Joetham, Katsuyuki Takeda, Brian P O'Connor, Erwin W Gelfand
BACKGROUND: Regulatory T cells (Tregs) play an essential role in the maintenance of immune homeostasis in allergic diseases. OBJECTIVES: To define the mechanisms underlying induction of tolerance to peanut protein and prevention of the development of peanut allergy. METHODS: High or low doses of peanut extract (PE) were administered to pups every day for 2 weeks prior to peanut sensitization and challenge. Following challenge, symptoms, Treg numbers, FoxP3, Th2, Th17 cytokine and TGFβ expression in mesenteric lymph node (MLN) CD4(+) T cells and in jejunum were monitored...
May 4, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28458670/gut-microbiota-species-can-provoke-both-inflammatory-and-tolerogenic-immune-responses-in-human-dendritic-cells-mediated-by-retinoic-acid-receptor-alpha-ligation
#13
Krisztian Bene, Zsofia Varga, Viktor O Petrov, Nadiya Boyko, Eva Rajnavolgyi
Dendritic cells are considered as the main coordinators of both mucosal and systemic immune responses, thus playing a determining role in shaping the outcome of effector cell responses. However, it is still uncovered how primary human monocyte-derived DC (moDC) populations drive the polarization of helper T (Th) cells in the presence of commensal bacteria harboring unique immunomodulatory properties. Furthermore, the individual members of the gut microbiota have the potential to modulate the outcome of immune responses and shape the immunogenicity of differentiating moDCs via the activation of retinoic acid receptor alpha (RARα)...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28438184/microbiota-activated-cd103-dcs-stemming-from-microbiota-adaptation-specifically-drive-%C3%AE-%C3%AE-t17-proliferation-and-activation
#14
Chris Fleming, Yihua Cai, Xuan Sun, Venkatakrishna R Jala, Feng Xue, Samantha Morrissey, Yu-Ling Wei, Yueh-Hsiu Chien, Huang-Ge Zhang, Bodduluri Haribabu, Jian Huang, Jun Yan
BACKGROUND: IL-17-producing γδT cells (γδT17) promote autoinflammatory diseases and cancers. Yet, γδT17 peripheral regulation has not been thoroughly explored especially in the context of microbiota-host interaction. The potent antigen-presenting CD103(+) dendritic cell (DC) is a key immune player in close contact with both γδT17 cells and microbiota. This study presents a novel cellular network among microbiota, CD103(+) DCs, and γδT17 cells. METHODS: Immunophenotyping of IL-17r(-/-) mice and IL-17r(-/-) IRF8(-/-) mice were performed by ex vivo immunostaining and flow cytometric analysis...
April 24, 2017: Microbiome
https://www.readbyqxmd.com/read/28436441/erratum-cd40-signalling-abrogates-induction-of-ror%C3%AE-t-treg-cells-by-intestinal-cd103-dcs-and-causes-fatal-colitis
#15
Christian Barthels, Ana Ogrinc, Verena Steyer, Stefanie Meier, Ferdinand Simon, Maria Wimmer, Andreas Blutke, Tobias Straub, Ursula Zimber-Strobl, Esther Lutgens, Peggy Marconi, Caspar Ohnmacht, Debora Garzetti, Bärbel Stecher, Thomas Brocker
No abstract text is available yet for this article.
April 24, 2017: Nature Communications
https://www.readbyqxmd.com/read/28434074/adipose-derived-stem-cells-ameliorate-experimental-murine-colitis-via-tsp-1-dependent-activation-of-latent-tgf-%C3%AE
#16
Hiroshi Takeyama, Tsunekazu Mizushima, Mamoru Uemura, Naotsugu Haraguchi, Junichi Nishimura, Taishi Hata, Chu Matsuda, Ichiro Takemasa, Masakazu Ikenaga, Kohei Murata, Hirofumi Yamamoto, Yuichiro Doki, Masaki Mori
BACKGROUND: Adipose tissue-derived stem cells (ASCs) have been investigated as therapeutic tools for a variety of autoimmune diseases, including inflammatory diseases. However, the mechanisms underlying the immunomodulatory properties of ASCs are not well understood. Here, we investigated the mechanism of regulatory T cell (Treg) induction in ASC therapy in a murine model of inflammatory bowel disease. METHODS: Acute colitis was induced in mice using dextran sulfate sodium and ASCs administered intraperitoneally...
April 22, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28424687/cd103-cd8-t-cells-in-the-toxoplasma-infected-brain-exhibit-a-tissue-resident-memory-transcriptional-profile
#17
Tyler A Landrith, Suhas Sureshchandra, Andrea Rivera, Jessica C Jang, Maham Rais, Meera G Nair, Ilhem Messaoudi, Emma H Wilson
During chronic infection, memory T cells acquire a unique phenotype and become dependent on different survival signals than those needed for memory T cells generated during an acute infection. The distinction between the role of effector and memory T cells in an environment of persistent antigen remains unclear. Here, in the context of chronic Toxoplasma gondii infection, we demonstrate that a population of CD8 T cells exhibiting a tissue-resident memory (TRM) phenotype accumulates within the brain. We show that this population is distributed throughout the brain in both parenchymal and extraparenchymal spaces...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28423340/transforming-growth-factor-%C3%AE-signaling-in-regulatory-t-cells-controls-t-helper-17-cells-and-tissue-specific-immune-responses
#18
Joanne E Konkel, Dunfang Zhang, Peter Zanvit, Cheryl Chia, Tamsin Zangarle-Murray, Wenwen Jin, Songlin Wang, WanJun Chen
Regulatory T cells (Treg cells) perform suppressive functions in disparate tissue environments and against many inflammatory insults, yet the tissue-enriched factor(s) that influence Treg cell phenotype and function remain largely unknown. We have shown a vital role for transforming growth factor-β (TGF-β) signals in safe-guarding specific Treg cell functions. TGF-β signals were dispensable for steady-state Treg cell homeostasis and for Treg cell suppression of T cell proliferation and T helper-1 (Th1) cell differentiation...
April 18, 2017: Immunity
https://www.readbyqxmd.com/read/28423181/mesenteric-lymph-node-cd11b-cd103-pd-l1-high-dendritic-cells-highly-induce-regulatory-t-cells
#19
Aya Shiokawa, Ryutaro Kotaki, Tomohiro Takano, Haruyo Nakajima-Adachi, Satoshi Hachimura
Dendritic cells (DCs) in mesenteric lymph nodes (MLNs) induce Foxp3(+) regulatory T cells to regulate immune responses to beneficial or non-harmful agents in the intestine, such as commensal bacteria and foods. Several studies in MLN DCs have revealed that CD103(+) DC subset highly induces regulatory T cells, and another study has reported that MLN DCs from PD-L1-deficient mice could not induce regulatory T cells. Thus, the present study investigated expression of these molecules on MLN CD11c(+) cells. Four distinct subsets expressing CD103 and/or PD-L1 were identified, namely CD11b(+) CD103(+) PD-L1(High) , CD11b(-) CD103(+) PD-L1(High) , CD11b(-) CD103(+) PD-L1(Low) , and CD11b(+) CD103(-) PD-L1(Int...
April 19, 2017: Immunology
https://www.readbyqxmd.com/read/28418282/immunohistochemical-detection-of-hairy-cell-leukemia-in-paraffin-sections-the-role-of-pax5-and-cd103-double-staining-to-improve-specificity-and-sensitivity
#20
Igor B Rozenvald, Maurice D Richardson, Lenessa Brock, Russell L Maiese
CONTEXT: - In hematopathology practice, abnormal expression of CD103 on B cells is detected by flow cytometry in hairy cell leukemia (HCL) and, in combination with other phenotypic and morphologic findings, provides diagnostic specificity and sensitivity. Immunostaining on paraffin sections makes it possible to perform immunophenotyping in situ. However, normal bone marrow contains CD103-positive cells, which are not B cells, making it difficult to be certain about low-level involvement by HCL...
April 18, 2017: Archives of Pathology & Laboratory Medicine
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