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https://www.readbyqxmd.com/read/29158374/maternal-igg-immune-complexes-induce-food-allergen-specific-tolerance-in-offspring
#1
Asa Ohsaki, Nicholas Venturelli, Tess M Buccigrosso, Stavroula K Osganian, John Lee, Richard S Blumberg, Michiko K Oyoshi
The role of maternal immune responses in tolerance induction is poorly understood. To study whether maternal allergen sensitization affects offspring susceptibility to food allergy, we epicutaneously sensitized female mice with ovalbumin (OVA) followed by epicutaneous sensitization and oral challenge of their offspring with OVA. Maternal OVA sensitization prevented food anaphylaxis, OVA-specific IgE production, and intestinal mast cell expansion in offspring. This protection was mediated by neonatal crystallizable fragment receptor (FcRn)-dependent transfer of maternal IgG and OVA immune complexes (IgG-IC) via breast milk and induction of allergen-specific regulatory T (T reg) cells in offspring...
November 20, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29120583/role-of-lymphocyte-subpopulations-in-the-immunopathogenesis-of-psoriasis-and-the-effect-of-narrow-band-uvb-phototherapy-on-the-immunological-profile-of-psoriasis-patients
#2
Mona Fattouh, Asmaa N El-Din, Mohammed A El-Hamd
Psoriasis is one of the most common chronic, inflammatory, T-cell-mediated autoimmune diseases. Narrow-band UVB (NB-UVB) therapy is widely used in the treatment of psoriasis; however, its mechanism of action is still not well understood. The objective of this study was to investigate the circulating T-lymphocyte subpopulations in psoriasis patients before and after NB-UVB, to get insights into the mechanism of NB-UVB in the treatment of psoriasis. The severity of psoriasis was assessed by means of the Psoriasis Area and Severity Index (PASI-score)...
January 2017: Egyptian Journal of Immunology
https://www.readbyqxmd.com/read/29066577/identification-and-characterization-of-t-reg-like-cells-in-zebrafish
#3
Melissa Kasheta, Corrie A Painter, Finola E Moore, Riadh Lobbardi, Alysia Bryll, Eli Freiman, David Stachura, Arlin B Rogers, Yariv Houvras, David M Langenau, Craig J Ceol
Regulatory T (T reg) cells are a specialized sublineage of T lymphocytes that suppress autoreactive T cells. Functional studies of T reg cells in vitro have defined multiple suppression mechanisms, and studies of T reg-deficient humans and mice have made clear the important role that these cells play in preventing autoimmunity. However, many questions remain about how T reg cells act in vivo. Specifically, it is not clear which suppression mechanisms are most important, where T reg cells act, and how they get there...
October 24, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29038367/a-nonimmune-function-of-t-cells-in-promoting-lung-tumor-progression
#4
Jesse A Green, Nicholas Arpaia, Michail Schizas, Anton Dobrin, Alexander Y Rudensky
The involvement of effector T cells and regulatory T (T reg) cells in opposing and promoting solid organ carcinogenesis, respectively, is viewed as a shifting balance between a breach versus establishment of tolerance to tumor or self-antigens. We considered that tumor-associated T cells might promote malignancy via distinct mechanisms used by T cells in nonlymphoid organs to assist in their maintenance upon injury or stress. Recent studies suggest that T reg cells can participate in tissue repair in a manner separable from their immunosuppressive capacity...
October 16, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29037917/immunomodulation-after-radiofrequency-ablation-of-locally-advanced-pancreatic-cancer-by-monitoring-the-immune-response-in-10-patients
#5
Alessandro Giardino, Giulio Innamorati, Stefano Ugel, Omar Perbellini, Roberto Girelli, Isabella Frigerio, Paolo Regi, Filippo Scopelliti, Giovanni Butturini, Salvatore Paiella, Matilde Bacchion, Claudio Bassi
OBJECTIVE/BACKGROUND: RFA of pancreatic cancer has been demonstrated to be feasible and safe with a positive impact on survival. The aim was to investigate whether an immune reaction is activated after locally advanced pancreatic cancer (LAPC) ablation. METHODS: Peripheral Blood samples were obtained preoperatively and on post-operative days 3-30. Evaluated parameters were: cells [CD4(+), CD8(+) and activated subsets, T-Reg, Monocytes, myeloid and plasmocytoid Dendritic cells (mDC and pDC)] and cytokines [Interleukin (IL)-6, Stromal-cells derived factor (SDF)-1, IL-1β, Tumour-Necrosis Factor (TNF)-α, Interferon (IFN)-γ, Vascular Endothelial Growth Factor (VEGF), chemokine (C-C motif) ligand 5 (CCL-5), Transforming-Growth Factor (TGF)-β]...
September 27, 2017: Pancreatology: Official Journal of the International Association of Pancreatology (IAP) ... [et Al.]
https://www.readbyqxmd.com/read/28975891/local-immune-response-in-cutaneous-basal-cell-carcinoma
#6
Silje Haukali Omland
BCC is an immunogenic tumor highlighted by the increased risk in immunosuppressed individuals and the frequent occurrence of tumor infiltrating lymphocytes (TILs) in the tumor surroundings. Immunotherapy is evolving as a promising treatment strategy for several cancer types where topical immunostimulators are among the possibilities for superficial BCC. The overall aim of this thesis is to characterize the immunologic response upon BCC as well as characterizing the surrounding tumor stroma. The aim was achieved by the use of a variety of laboratory techniques; immunohistochemistry, immunoflourescence, qRT-PCR and NGS...
October 2017: Danish Medical Journal
https://www.readbyqxmd.com/read/28954490/decreased-nk-cell-activity-after-partial-vulvectomy-in-pregnant-patient-with-vulvar-intraepithelial-neoplasia-3-vin3
#7
Malgorzata Jerzak, Andrzej Nowakowski, Monika Ohams, Andrzej Górski, Włodzimierz Baranowsk
INTRODUCTION AND OBJECTIVE: The study presents the problem of immune disturbances in pregnant women with vulvar carcinoma in situ (VIN3). MATERIAL AND METHODS: NK cell and T reg activity in the study patient were analysed using flow cytometry. RESULTS: Decreased NK cell activity and but increased T reg activity were observed after vulvectomy, with subsequent successful pregnancy outcome. CONCLUSIONS: Although vulvar cancer may influence immune cell activity, this issue merits further study...
September 21, 2017: Annals of Agricultural and Environmental Medicine: AAEM
https://www.readbyqxmd.com/read/28954091/beh%C3%A3-et-s-disease-review-with-emphasis-on-dermatological-aspects
#8
REVIEW
Maria Antonieta Rios Scherrer, Vanessa Barreto Rocha, Lucas Campos Garcia
Behçet's disease is a systemic vasculitis characterized by attacks of acute inflammation, which can affect almost every vascularized area of the body. There is a close correlation between the geographical distribution of HLA-B51 and its prevalence. In the etiopathogenesis there are indications of genetic susceptibility associated with environmental influence. Among the involved genes are those that encompass innate and adaptive immunities. Polymorphisms and epistatic interactions in several genes are described, as well as the presence of imbalance lineage between HLA-B51 and A (MICA)...
July 2017: Anais Brasileiros de Dermatologia
https://www.readbyqxmd.com/read/28879170/helicobacter-pylori-caga-is-associated-with-milder-duodenal-histological-changes-in-chilean-celiac-patients
#9
Yalda Lucero, Amaya Oyarzún, Miguel O'Ryan, Rodrigo Quera, Nelly Espinosa, Romina Valenzuela, Daniela Simian, Elisa Alcalde, Claudio Arce, Mauricio J Farfán, Alejandra F Vergara, Iván Gajardo, Jocelyn Mendez, Jorge Carrasco, Germán Errázuriz, Mónica Gonzalez, Juan C Ossa, Eduardo Maiza, Francisco Perez-Bravo, Magdalena Castro, Magdalena Araya
HIGHLIGHTS What is already known about this subject?Celiac disease (CD) has a high clinical and histological diversity and the mechanisms underlying this phenomenon remain elusive.H. pylori is a bacterium that chronically infect gastric and duodenal mucosa activating both a Th1/Th17 and T-reg pathways.The role of H. pylori (and the effect of their virulence factors) in CD have not yet completely elucidated.What are the new findings?cagA+ H. pylori strains are associated to milder histological damage in infected CD patients...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28839507/comparison-of-immune-responses-in-pigs-infected-with-chinese-highly-pathogenic-prrs-virus-strain-hv-and-north-american-strain-nadc-20
#10
X Li, A Galliher-Beckley, L Wang, J Nietfeld, W Feng, J Shi
INTRODUCTION: Chinese HP-PRRSV characterized by high morbidity and mortality of all ages of pigs emerged since 2006 in China. The immune response of HP-PRRSV was never compared with conventional low pathogenic PRRSV strain. OBJECTIVE: In this study, we compared the immune responses elicited by a Chinese HP-PRRSV strain HV and a North American RRSV strain NADC20 infections. RESULT: Pigs infected with NADC-20 showed significantly higher Ab titers than HV-PRRSV infected pigs at 9 DPI...
2017: Open Virology Journal
https://www.readbyqxmd.com/read/28830910/redefining-thymus-medulla-specialization-for-central-tolerance
#11
Emilie J Cosway, Beth Lucas, Kieran D James, Sonia M Parnell, Manuela Carvalho-Gaspar, Andrea J White, Alexei V Tumanov, William E Jenkinson, Graham Anderson
During αβT cell development, the thymus medulla represents an essential microenvironment for T cell tolerance. This functional specialization is attributed to its typical organized topology consisting of a branching structure that contains medullary thymic epithelial cell (mTEC) networks to support negative selection and Foxp3(+) T-regulatory cell (T-reg) development. Here, by performing TEC-specific deletion of the thymus medulla regulator lymphotoxin β receptor (LTβR), we show that thymic tolerance mechanisms operate independently of LTβR-mediated mTEC development and organization...
November 6, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28807036/t-time-a-data-repository-of-t-cell-and-calcium-release-activated-calcium-channel-activation-imagery
#12
Cody Arbuckle, Milton Greenberg, Adrienne Bergh, Rene German, Nick Sirago, Erik Linstead
BACKGROUND: A fundamental understanding of live-cell dynamics is necessary in order to advance scientific techniques and personalized medicine. For this understanding to be possible, image processing techniques, probes, tracking algorithms and many other methodologies must be improved. Currently there are no large open-source datasets containing live-cell imaging to act as a standard for the community. As a result, researchers cannot evaluate their methodologies on an independent benchmark or leverage such a dataset to formulate scientific questions...
August 15, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28765071/ficz-generates-human-tdcs-that-induce-cd4-cd25-high-foxp3-treg-like-cell-differentiation
#13
Brenda B Jurado-Manzano, Daniel Zavala-Reyes, Edgar A Turrubiartes-Martínez, Diana P Portales-Pérez, Roberto González-Amaro, Esther Layseca-Espinosa
Dendritic cells (DCs) play a central role in the maintenance of immune homeostasis, their participation as professional antigen presenting cells is essential to the initiation of the adaptive immune response as well as to the induction of tolerance. The recently described role of the aryl hydrocarbon receptor (AhR) in the immune system, particularly in the modulation of the adaptive immune response has attracted the attention as a potential player in the induction of immune tolerance. However, the effects of AhR activation through endogenous ligands on human DCs have been poorly evaluated...
July 29, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28762907/-subpopulation-composition-of-cd4-t-lymphocytes-as-factor-contributing-to-the-progression-of-atherosclerosis-of-carotid-arteries
#14
A Yu Filatova, E A Pylaeva, A V Potekhina, A K Osokina, O A Pogorelova, M I Tripoten, T V Balakhonova, S I Provatorov, E A Noeva, E A Klesareva, O I Afanasieva, T I Arefieva
AIM: to assess prognostic significance of blood content of regulatory and effector T-lymphocytes for progression of atherosclerosis (AS) of carotid arteries. MATERIAL AND METHODS: We enrolled in this study 33 men with various severity of carotid AS. Carotid artery duplex scan was done at admission and in 1 year after enrollment. AS progression was defined as appearance of novel stenosis in common or internal carotid artery or more or equal 5% increase of preexisting stenosis...
April 2017: Kardiologiia
https://www.readbyqxmd.com/read/28720146/analysis-of-long-term-cd4-cd25highcd127-t-reg-cells-kinetics-in-peripheral-blood-of-lung-transplant-recipients
#15
Davide Piloni, Monica Morosini, Sara Magni, Alice Balderacchi, Luigia Scudeller, Emanuela Cova, Tiberio Oggionni, Giulia Stella, Carmine Tinelli, Filippo Antonacci, Andrea Maria D'Armini, Federica Meloni
BACKGROUND: The role of CD4(+)CD25(high)CD127(-) T-reg cells in solid-organ Transplant (Tx) acceptance has been extensively studied. In previous studies on kidney and liver recipients, peripheral T-reg cell counts were associated to graft survival, while in lung Tx, there is limited evidence for similar findings. This study aims to analyze long term peripheral kinetics of T-reg-cells in a cohort of lung recipients and tests its association to several clinical variables. METHODS: From jan 2009 to dec 2014, 137 lung Tx recipients were submitted to an immunological follow up (median: 105...
July 18, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/28670318/cigarette-smoke-increases-cd8%C3%AE-dendritic-cells-in-an-ovalbumin-induced-airway-inflammation
#16
Thayse Regina Brüggemann, Paula Fernandes, Luana de Mendonça Oliveira, Maria Notomi Sato, Mílton de Arruda Martins, Fernanda Magalhães Arantes-Costa
Asthma is an allergic lung disease and, when associated to cigarette smoke exposition, some patients show controversial signs about lung function and other inflammatory mediators. Epidemiologic and experimental studies have shown both increasing and decreasing inflammation in lungs of subjects with asthma and exposed to cigarette smoke. Therefore, in this study, we analyzed how cigarette smoke affects pro-inflammatory and anti-inflammatory mediators in a murine model of allergic pulmonary inflammation. We sensitized Balb/c mice to ovalbumin (OVA) with two intraperitoneal injections...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28655574/cisplatin-along-with-herbal-drug-treatment-reduces-the-percentage-of-regulatory-t-cells-and-decreased-the-severity-of-experimental-visceral-leishmaniasis
#17
Heena Sachdeva, Sukhbir Kaur
BACKGROUND: Visceral leishmaniasis is the most alarming and devastating amongst the various forms of leishmaniases. It is caused by Leishmania donovani, an obligate intracellular parasite of macrophages that survives through immunosuppression. Absence of T regulatory cells provides complete clearance of the parasite. A few immunoprophylactics have been sought to battle instinctive leishmaniasis, with fluctuating achievement. Our previous studies have shown that treatment of L. donovani infected mice with cisplatin along with herbal drugs resulted in decreased parasite load with heightened delayed type hypersensitivity responses (DTH), increased levels of IgG2a, IFN-γ, IL-2, CD4+ cells, NK 1...
June 8, 2017: Journal of Microbiology, Immunology, and Infection, Wei Mian Yu Gan Ran za Zhi
https://www.readbyqxmd.com/read/28599462/detection-of-tax-specific-ctls-in-lymph-nodes-of-adult-t-cell-leukemia-lymphoma-patients-and-its-association-with-foxp3-positivity-of-regulatory-t-cell-function
#18
Ayako Ichikawa, Hiroaki Miyoshi, Fumiko Arakawa, Junichi Kiyasu, Kensaku Sato, Daisuke Niino, Yoshizo Kimura, Maki Yoshida, Riko Kawano, Hiroko Muta, Yasuo Sugita, Koichi Ohshima
Human T-cell lymphotropic virus type (HTLV)-1 Tax is a viral protein that has been reported to be important in the proliferation of adult T-cell leukemia/lymphoma (ATLL) cells and to be a target of HTLV-1-specific cytotoxic T lymphocytes (CTLs). However, it is not clear how Tax-specific CTLs behave in lymph nodes of ATLL patients. The present study analyzed the immunostaining of Tax-specific CTLs. Furthermore, ATLL tumor cells are known to be positive for forkhead box P3 (Foxp3)and to have a regulatory T (Treg)-cell-like function...
June 2017: Oncology Letters
https://www.readbyqxmd.com/read/28594573/activation-of-the-integrated-stress-response-and-metabolic-dysfunction-in-a-murine-model-of-sleep-apnea
#19
Abdelnaby Khalyfa, Zhuanhong Qiao, Alex Gileles-Hillel, Ahamed A Khalyfa, Mahzad Akbarpour, Brian Popko, David Gozal
Intermittent hypoxia (IH) induces activation of the integrated stress response (ISR), but its role in IH-induced visceral white adipose tissue (vWAT) insulin resistance is unknown. CHOP is activated by chronic ISR, whereas GADD34 dephosphorylates the subunit of translation initiation factor 2 (eIF2α), leading to termination of the ISR. We hypothesized that CHOP/Gadd34 null mice would not manifest evidence of insulin resistance after IH exposures. Eight-week-old CHOP/GADD34(-/-) (double mutant [DM]) and wild-type (WT) littermates were randomly assigned to IH or room air (RA) exposures for 6 weeks...
October 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28590550/osi-027-modulates-acute-graft-versus-host-disease-after-liver-transplantation-in-a-rat-model
#20
Xiao Zhi, Fei Xue, Wei Chen, Chao Liang, Hao Liu, Tao Ma, Xuefeng Xia, Liqiang Hu, Xueli Bai, Tingbo Liang
Despite its rarity (1%-2%), acute graft-versus-host disease after liver transplantation (LT-aGVHD) has a high mortality rate (85%). A gradual decrease in regulatory T cells (Tregs) correlates with disease progression in a rat LT-GVHD model, and treatments which increase Tregs exert therapeutic effects on LT-aGVHD. In this study, LT-aGVHD model rats were treated with rapamycin (RAPA), OSI-027, or an equal quantity of vehicle. Rats treated with OSI-027 survived longer (>100 days) than those in the RAPA (70 ± 8 days) or control (24 ± 3 days) groups...
September 2017: Liver Transplantation
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