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https://www.readbyqxmd.com/read/28638851/mucosal-biopsy-shows-immunologic-changes-of-the-colon-in-patients-with-early-ms
#1
Adrian Mathias Moser, Walter Spindelboeck, Heimo Strohmaier, Christian Enzinger, Thomas Gattringer, Siegrid Fuchs, Franz Fazekas, Gregor Gorkiewicz, Philipp Wurm, Christoph Högenauer, Michael Khalil
OBJECTIVE: To investigate immune cells of the colonic mucosa and fecal short-chain fatty acids (SCFAs) in treatment-naive patients with a clinically isolated syndrome (CIS) or early relapsing MS. METHODS: In this cross-sectional proof-of-concept study, we obtained mucosal specimens during ileocolonoscopy from 15 untreated patients with CIS/MS and 10 controls. Mucosal immune cells were analyzed by FACS, and gas chromatography-mass spectrometry measurements of stool samples served to determine SCFA...
July 2017: Neurology® Neuroimmunology & Neuroinflammation
https://www.readbyqxmd.com/read/28628641/hypersensitivity-pneumonitis-onset-and-severity-is-regulated-by-cd103-dendritic-cell-expression
#2
Emilie Bernatchez, Anick Langlois, Julyanne Brassard, Nicolas Flamand, David Marsolais, Marie-Renée Blanchet
BACKGROUND: Pulmonary dendritic cells drive lung responses to foreign antigens, including Saccharopolyspora rectivirgula, a causative agent of hypersensitivity pneumonitis. While the airway inflammatory mechanisms involved in hypersensitivity pneumonitis are well described, the mechanisms leading to the break in homeostasis and hypersensitivity pneumonitis onset are not well-described, and could involve CD103+ dendritic cells, which are found at baseline and during inflammatory responses in the lung...
2017: PloS One
https://www.readbyqxmd.com/read/28628092/tissue-resident-memory-features-are-linked-to-the-magnitude-of-cytotoxic-t-cell-responses-in-human-lung-cancer
#3
Anusha-Preethi Ganesan, James Clarke, Oliver Wood, Eva M Garrido-Martin, Serena J Chee, Toby Mellows, Daniela Samaniego-Castruita, Divya Singh, Grégory Seumois, Aiman Alzetani, Edwin Woo, Peter S Friedmann, Emma V King, Gareth J Thomas, Tilman Sanchez-Elsner, Pandurangan Vijayanand, Christian H Ottensmeier
Therapies that boost the anti-tumor responses of cytotoxic T lymphocytes (CTLs) have shown promise; however, clinical responses to the immunotherapeutic agents currently available vary considerably, and the molecular basis of this is unclear. We performed transcriptomic profiling of tumor-infiltrating CTLs from treatment-naive patients with lung cancer to define the molecular features associated with the robustness of anti-tumor immune responses. We observed considerable heterogeneity in the expression of molecules associated with activation of the T cell antigen receptor (TCR) and of immunological-checkpoint molecules such as 4-1BB, PD-1 and TIM-3...
June 19, 2017: Nature Immunology
https://www.readbyqxmd.com/read/28626064/monitoring-c3ar-expression-using-a-floxed-tdtomato-c3ar-reporter-knock-in-mouse
#4
Katharina M Quell, Christian M Karsten, Anna Kordowski, Larissa Nogueira Almeida, Daria Briukhovetska, Anna V Wiese, Jing Sun, Fanny Ender, Konstantina Antoniou, Torsten Schröder, Inken Schmudde, Johann L Berger, Peter König, Tillman Vollbrandt, Yves Laumonnier, Jörg Köhl
C3a exerts multiple biologic functions through activation of its cognate C3a receptor. C3(-/-) and C3aR(-/-) mice have been instrumental in defining important roles of the C3a/C3aR axis in the regulation of acute and chronic inflammatory diseases, including ischemia/reperfusion injury, allergic asthma, autoimmune nephritis, and rheumatoid arthritis. Surprisingly little is known about C3aR expression and function in immune and stromal cells. To close this gap, we generated a floxed tandem-dye Tomato (tdTomato)-C3aR reporter knock-in mouse, which we used to monitor C3aR expression in cells residing in the lung, airways, lamina propria (LP) of the small intestine, brain, visceral adipose tissue, bone marrow (BM), spleen, and the circulation...
June 16, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28615301/irf4-dependent-cd103-cd11b-dendritic-cells-and-the-intestinal-microbiome-regulate-monocyte-and-macrophage-activation-and-intestinal-peristalsis-in-postoperative-ileus
#5
Judith-Mira Pohl, Sebastian Gutweiler, Stephanie Thiebes, Julia K Volke, Ludger Klein-Hitpass, Denise Zwanziger, Matthias Gunzer, Steffen Jung, William W Agace, Daniel Robert Engel, Christian Kurts
OBJECTIVE: Postoperative ileus (POI), the most frequent complication after intestinal surgery, depends on dendritic cells (DCs) and macrophages. Here, we have investigated the mechanism that activates these cells and the contribution of the intestinal microbiota for POI induction. DESIGN: POI was induced by manipulating the intestine of mice, which selectively lack DCs, monocytes or macrophages. The disease severity in the small and large intestine was analysed by determining the distribution of orally applied fluorescein isothiocyanate-dextran and by measuring the excretion time of a retrogradely inserted glass ball...
June 14, 2017: Gut
https://www.readbyqxmd.com/read/28612840/toll-like-receptor-3-in-nasal-cd103-dendritic-cells-is-involved-in-immunoglobulin-a-production
#6
H Takaki, S Kure, H Oshiumi, Y Sakoda, T Suzuki, A Ainai, H Hasegawa, M Matsumoto, T Seya
Intranasal inoculation with influenza hemagglutinin subunit with polyinosine-polycytidylic (polyI:C), a synthetic analog for double-stranded RNA, enhances production of vaccine-specific immunoglobulin (Ig) A, which is superior to IgG in prophylactic immunity. The mechanism whereby polyI:C skews to IgA production in the nasal-associated lymph tissue (NALT) was investigated in mouse models. Nasally instilled polyI:C was endocytosed into CD103(+) dendritic cells (DCs) and induced T-cell activation, including interferon (IFN)-γ production...
June 14, 2017: Mucosal Immunology
https://www.readbyqxmd.com/read/28598427/different-populations-of-cd11b-dendritic-cells-drive-th2-responses-in-the-small-intestine-and-colon
#7
Johannes U Mayer, Mimoza Demiri, William W Agace, Andrew S MacDonald, Marcus Svensson-Frej, Simon W Milling
T-helper 2 (Th2) cell responses defend against parasites. Although dendritic cells (DCs) are vital for the induction of T-cell responses, the DC subpopulations that induce Th2 cells in the intestine are unidentified. Here we show that intestinal Th2 responses against Trichuris muris worms and Schistosoma mansoni eggs do not develop in mice with IRF-4-deficient DCs (IRF-4(f/f) CD11c-cre). Adoptive transfer of conventional DCs, in particular CD11b-expressing DCs from the intestine, is sufficient to prime S. mansoni-specific Th2 responses...
June 9, 2017: Nature Communications
https://www.readbyqxmd.com/read/28575142/flow-cytometric-patterns-of-cd200-and-cd1d-expression-distinguish-cd10-negative-cd5-negative-mature-b-cell-lymphoproliferative-disorders
#8
Emily Mason, Olga Pozdnyakova, Betty Li, Graham Dudley, David M Dorfman
Objectives: The importance of distinguishing mature B-cell lymphoproliferative disorders (B-LPDs) is highlighted by the distinct treatments used for and varying prognoses seen in association with these different diseases. Immunophenotyping allows for accurate and efficient differentiation of many B-LPDs. Recently, we showed that CD200 is highly expressed in hairy cell leukemia (HCL) but not in marginal zone lymphoma (MZL), lymphoplasmacytic lymphoma (LPL), or hairy cell leukemia-variant (HCL-v)...
June 1, 2017: American Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28573184/a-comparative-study-of-replication-incompetent-and-competent-adenoviral-therapy-mediated-immune-response-in-a-murine-glioma-model
#9
Julius W Kim, Jason Miska, Jacob S Young, Aida Rashidi, J Robert Kane, Wojciech K Panek, Deepak Kanojia, Yu Han, Irina V Balyasnikova, Maciej S Lesniak
Oncolytic virotherapy is a treatment approach with increasing clinical relevance, as indicated by the marked survival benefit seen in animal models and its current exploration in human patients with cancer. The use of an adenovirus vector for this therapeutic modality is common, has significant clinical benefit in animals, and its efficacy has recently been linked to an anti-tumor immune response that occurs following tumor antigen presentation. Here, we analyzed the adaptive immune system's response following viral infection by comparing replication-incompetent and replication-competent adenoviral vectors...
June 16, 2017: Molecular Therapy Oncolytics
https://www.readbyqxmd.com/read/28557137/modulation-of-cd11c-lung-dendritic-cells-in-respect-to-tgf-%C3%AE-in-experimental-pulmonary-fibrosis
#10
Kaustav Chakraborty, Soumya Chatterjee, Arindam Bhattacharyya
Idiopathic Pulmonary fibrosis (IPF) is a deadly progressive lung disease with very few treatment options till now. Bleomycin-induced pulmonary fibrosis (BIPF) is a commonly used mice model in IPF research. TGF-β1 has been shown to play a key role in pulmonary fibrosis (PF). Dendritic cell (DC) acts as a bridge between innate and adaptive immune system. The coexistence of chronic inflammation sustained by mature DCs with fibrosis suggests that inflammatory phenomenon has key importance in the pathogenesis of pulmonary fibrosis...
May 30, 2017: Cell Biology International
https://www.readbyqxmd.com/read/28550053/batf3-dendritic-cells-drive-adoptive-effector-t-cell-trafficking
#11
(no author information available yet)
Trafficking of adoptively transferred effector T cells requires CD103(+) dendritic cell-derived CXCL9/10.
May 26, 2017: Cancer Discovery
https://www.readbyqxmd.com/read/28542882/butyrate-and-retinoic-acid-synergistically-imprint-mucosal-like-dendritic-cell-development-from-bone-marrow-cells
#12
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
#13
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
#14
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
#15
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
#16
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...
July 2017: Nature Immunology
https://www.readbyqxmd.com/read/28526759/il-2-high-tissue-resident-t-cells-in-the-human-liver-sentinels-for-hepatotropic-infection
#17
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(+))...
June 5, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28515363/lung-cd103-dendritic-cells-restrain-allergic-airway-inflammation-through-il-12-production
#18
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
#19
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
#20
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...
June 15, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
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