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https://www.readbyqxmd.com/read/29676593/icos-costimulation-differentially-affects-t-cells-in-secondary-lymphoid-organs-and-inflamed-tissues
#1
Dana Vu Van, Laura Bauer, Richard A Kroczek, Andreas Hutloff
B cell interaction with follicular helper T cells and their subsequent differentiation into high-affinity antibody producing cells normally takes place in secondary lymphoid organs. The costimulator ICOS plays a key role in this process and is therefore considered as an attractive target to modulate exaggerated B cell responses in autoimmune or allergic diseases. Inflamed tissues were recently recognized as additional sites of active T cell/B cell interaction. To analyze whether ICOS costimulation is also important there, we employed a mouse airway inflammation model which allows to directly compare immune reactions in the lung-draining lymph node and the lung tissue and also to assess the relative importance of dendritic cells versus B cells as antigen-presenting cells...
April 20, 2018: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/29670614/human-v%C3%AE-9v%C3%AE-2-t-cells-synergize-cd4-t-follicular-helper-cells-to-produce-influenza-virus-specific-antibody
#2
Qingyun Chen, Kun Wen, Aizhen Lv, Ming Liu, Ke Ni, Zheng Xiang, Yinping Liu, Wenwei Tu
Human Vγ9Vδ2-T cells recognize nonpeptidic antigens and exert effector functions against microorganisms and tumors, but little is known about their roles in humoral immune response against influenza virus infection. Herein, in the coculture of autologous human B cells, dendritic cells and/or naïve CD4 T cells, and Vγ9Vδ2-T cells, we demonstrated that Vγ9Vδ2-T cells could facilitate H9N2 influenza virus-specific IgG and IgM productions in a CD4 T cell-dependent manner. Vγ9Vδ2-T cells promoted the differentiation of CXCR5+ PD1+ CD4+ T follicular helper (Tfh) cells, CD19+ IgD- CD38++ plasma cells (PCs), and drove B cell proliferation as well as immunoglobulin class switching...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29669192/immunological-behavior-analysis-of-muscle-cells-under-ifn-%C3%AE-stimulation-in-vitro-and-in-vivo
#3
Maochao Ding, Tao Huang, Rong Zhu, Ruicai Gu, Dandan Shi, Jiangwei Xiao, Mengxia Guo, Junhua Li, JiJie Hu, Hua Liao
Muscle cells could serve as antigen-presenting cells, and participate in the activation of immune response. Immunological characteristics of muscle cells, and their capacities to equip themselves with immunorelevant molecules, remain to be elucidated. In this study, we investigated the immunological properties of myoblasts and differentiated myotubes in vitro and in vivo, under the IFN-γ induced inflammatory condition. We found that the fused C2 C12 myotubes are more sensitive to inflammatory stimulation, and significantly up-regulated the expression levels of MHC-I/II and TLR3/7 molecules, than that of proliferated myoblasts...
April 18, 2018: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29662631/overlap-at-the-molecular-and-immunohistochemical-levels-between-angioimmunoblastic-t-cell-lymphoma-and-a-subgroup-of-peripheral-t-cell-lymphomas-without-specific-morphological-features
#4
Rebeca Manso, Julia González-Rincón, Manuel Rodríguez-Justo, Giovanna Roncador, Sagrario Gómez, Margarita Sánchez-Beato, Miguel A Piris, Socorro M Rodríguez-Pinilla
The overlap of morphology and immunophenotype between angioimmunoblastic T-cell lymphoma (AITL) and other nodal peripheral T-cell lymphomas (n-PTCLs) is a matter of current interest whose clinical relevance and pathogenic background have not been fully established. We studied a series of 98 n-PTCL samples (comprising 57 AITL and 41 PTCL-NOS) with five TFH antibodies (CD10, BCL-6, PD-1, CXCL13, ICOS), looked for mutations in five of the genes most frequently mutated in AITL ( TET2 , DNMT3A, IDH2, RHOA and PLCG1 ) using the Next-Generation-Sequencing Ion Torrent platform, and measured the correlations of these characteristics with morphology and clinical features...
March 23, 2018: Oncotarget
https://www.readbyqxmd.com/read/29661826/tumor-tolerance-promoting-function-of-regulatory-t-cells-is-optimized-by-cd28-but-strictly-dependent-on-calcineurin
#5
Francesco Marangoni, Ruan Zhang, Vinidhra Mani, Martin Thelen, Noor J Ali Akbar, Ross D Warner, Tarmo Äijö, Valentina Zappulli, Gustavo J Martinez, Laurence A Turka, Thorsten R Mempel
Regulatory T cells (Treg) restrain immune responses against malignant tumors, but their global depletion in cancer patients will likely be limited by systemic autoimmune toxicity. Instead, approaches to "tune" their activities may allow for preferential targeting of tumor-reactive Treg. Although Ag recognition regulates Treg function, the roles of individual TCR-dependent signaling pathways in enabling Treg to promote tumor tolerance are not well characterized. In this study, we examined in mouse tumor models the role of calcineurin, a key mediator of TCR signaling, and the role of the costimulatory receptor CD28 in the differentiation of resting central Treg into effector Treg endowed with tumor tropism...
April 16, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29660300/the-major-orphan-forms-of-ichthyosis-are-characterized-by-systemic-t-cell-activation-and-th-17-tc-17-th-22-tc22-polarization-in-blood
#6
Tali Czarnowicki, Helen He, Alexandra Leonard, Kunal Malik, Shai Magidi, Stephanie Rangel, Krishna Patel, Kara Ramsey, Morgan Murphrey, Teresa Song, Yeriel Estrada, Hue-Chi Wen, James G Krueger, Emma Guttman-Yassky, Amy S Paller
The ichthyoses are rare skin disorders with immune and barrier aberrations. Identifying blood phenotypes may advance targeted-therapeutics.We aimed to compare frequencies of skin homing/CLA+ vs. systemic/CLA- "polar" CD4+ /CD8+ and activated T-cell subsets in ichthyosis vs. atopic dermatitis/AD, psoriasis and control blood, with appropriate clinical correlations. Flow cytometry was used to measure IFN-γ, IL-13, IL-9, IL-17, and IL-22 cytokines in CD4+ /CD8+ T-cells, with ICOS and HLA-DR defining mid- and long-term T-cell activation, respectively...
April 13, 2018: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/29652652/circulating-follicular-helper-t-cells-cd4-cxcr5-icos-decrease-in-patients-with-rheumatoid-arthritis-treated-with-abatacept
#7
Silvia Piantoni, Francesca Regola, Mirko Scarsi, Angela Tincani, Paolo Airò
No abstract text is available yet for this article.
April 13, 2018: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/29649401/intrahospital-mortality-and-survival-of-patients-with-advanced-chronic-illnesses-in-a-tertiary-hospital-identified-with-the-necpal-ccoms-ico-%C3%A2-tool
#8
Agnès Calsina-Berna, Marisa Martinez-Muñoz, Ignasi Bardés Robles, Elba Beas Alba, Rafael Madariaga Sánchez, Xavier Gómez Batiste Alentorn
BACKGROUND: Between 69% and 82% of patients with advanced chronic illness require palliative care (PC). The NECPAL CCOMS-ICO© tool can identify these individuals. Tools to estimate survival are available, but have limited predictive ability, and therefore we sought to assess if NECPAL could improve survival prediction. OBJECTIVE: To describe hospital mortality, survival rates, and related variables in a sample of inpatients identified with the NECPAL tool. DESIGN: Cross-sectional study with longitudinal cohort follow-up...
March 19, 2018: Journal of Palliative Medicine
https://www.readbyqxmd.com/read/29645300/a-comparison-of-extraction-systems-for-plant-water-stable-isotope-analysis
#9
Cody Millar, Dyan Pratt, Dave Schneider, Jeffrey J McDonnell
RATIONALE: The stable isotope ratios of water (δ2 H and δ18 O values) have been widely used to trace water in plants in a variety of physiological, ecohydrological, biogeochemical and hydrological studies. In such work, the analyte must first be extracted from samples, prior to isotopic analysis. While cryogenic vacuum distillation is currently the most widely used method in the literature, a variety of extraction-collection-analysis methods exist. A formal inter-method comparison on plant tissues has yet to be carried out...
April 12, 2018: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/29617174/prolonged-follicular-helper-t-cell-responses-in-me7-scrapie-infected-mice
#10
Soochan Kim, Sinsuk Han, Taehyun Kim, Jeehoon Nam, Yong-Sun Kim, Eun-Kyoung Choi, Mi-Yeon Kim
We previously reported that mice intracerebrally inoculated with the mouse-adapted scrapie strain ME7 have markedly diminished T zones in the spleen due to the decreased expression of CCL19 and CCL21. In addition, follicular dendritic cell networks in germinal centers were larger in ME7-infected spleens compared to uninfected spleens. As an extension of that study, we set out to determine how ME7 infection affects spleen structure and follicular helper T (Tfh) cell responses in mice. For this study, mice were intraperitoneally inoculated with brain homogenate of the ME7 inoculum and spleens were analyzed 50, 130, and 200 days after inoculation and compared with those from uninfected mice...
April 4, 2018: Prion
https://www.readbyqxmd.com/read/29614981/a-comparison-of-the-local-immune-status-between-the-primary-and-metastatic-tumor-in-colorectal-cancer-a-retrospective-study
#11
Masatsune Shibutani, Kiyoshi Maeda, Hisashi Nagahara, Tatsunari Fukuoka, Shinji Matsutani, Shinichiro Kashiwagi, Hiroaki Tanaka, Kosei Hirakawa, Masaichi Ohira
BACKGROUND: The anticancer immune response has been reported to correlate with cancer progression. Tumor-infiltrating lymphocytes (TILs), which are one of the indicators of host immunity, affect the tumor growth, metastasis and chemoresistance. Both TILs in the primary tumor and those in the metastatic tumor have been reported to be a useful predictor of the survival and therapeutic outcome. However, the correlation between the density of TILs in the primary and metastatic tumor is unclear...
April 3, 2018: BMC Cancer
https://www.readbyqxmd.com/read/29581356/icos-signaling-controls-induction-and-maintenance-of-collagen-induced-arthritis
#12
Vincent Panneton, Sahar Bagherzadeh Yazdchi, Mariko Witalis, Jinsam Chang, Woong-Kyung Suh
ICOS is a key costimulatory receptor facilitating differentiation and function of follicular helper T cells and inflammatory T cells. Rheumatoid arthritis patients were shown to have elevated levels of ICOS+ T cells in the synovial fluid, suggesting a potential role of ICOS-mediated T cell costimulation in autoimmune joint inflammation. In this study, using ICOS knockout and knockin mouse models, we found that ICOS signaling is required for the induction and maintenance of collagen-induced arthritis (CIA), a murine model of rheumatoid arthritis...
March 26, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29580042/associations-of-icos-and-pd-1-gene-variants-with-colon-cancer-risk-in-the-iranian-population
#13
Seyedeh Azra Shamsdin, Mohammad Hossein Karimi, Seyed Vahid Hosseini, Bita Geramizadeh, Mohamad Reza Fattahi, Davood Mehrabani, Ali Moravej
Background: Positive and negative co-stimulatory molecules are important factors determining the outcome of immune responses to the presence of tumors. Since co-stimulatory molecule expression may be affected by gene polymorphisms, we aimed to investigate associations between variants of PD.1 and ICOS and susceptibility to colon cancer. Material and methods: ICOS (-693A/G), ICOS (+1720C/T) and PD.1 (-538G/A) gene polymorphisms were evaluated by the PCR-RFLP method in 76 colon cancer patients and 73 healthy controls...
March 27, 2018: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/29575442/high-temporal-resolution-gastric-emptying-breath-tests-in-mice
#14
K E Miller, Ž Bajzer, S S Hein, J E Phillips, S Syed, A M Wright, G Cipriani, S J Gibbons, J H Szurszewski, G Farrugia, T Ordog, D R Linden
BACKGROUND: Gastric emptying is a complex physiological process regulating the division of a meal into smaller partitions for the small intestine. Disrupted gastric emptying contributes to digestive disease, yet current measures may not reflect different mechanisms by which the process can be altered. METHODS: We have developed high temporal resolution solid and liquid gastric emptying breath tests in mice using [13 C]-octanoic acid and off axis- integrated cavity output spectroscopy (OA-ICOS)...
March 25, 2018: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/29567630/anthracycline-induced-cardiotoxicity-a-multicenter-randomised-trial-comparing-two-strategies-for-guiding-prevention-with-enalapril-the-international-cardiooncology-society-one-trial
#15
Daniela Cardinale, Fabio Ciceri, Roberto Latini, Maria Grazia Franzosi, Maria Teresa Sandri, Maurizio Civelli, GianFranco Cucchi, Elisabetta Menatti, Maurizio Mangiavacchi, Raffaele Cavina, Enrico Barbieri, Stefania Gori, Alessandro Colombo, Giuseppe Curigliano, Michela Salvatici, Antonio Rizzo, Francesco Ghisoni, Alessandra Bianchi, Cristina Falci, Michele Aquilina, Andrea Rocca, Anna Monopoli, Carlo Milandri, Giuseppe Rossetti, Marco Bregni, Marco Sicuro, Alessandra Malossi, Daniele Nassiacos, Claudio Verusio, Monica Giordano, Lidia Staszewsky, Simona Barlera, Enrico B Nicolis, Michela Magnoli, Serge Masson, Carlo M Cipolla
BACKGROUND: Troponin changes over time have been suggested to allow for an early diagnosis of cardiac injury ensuing cancer chemotherapy; cancer patients with troponin elevation may benefit of therapy with enalapril. It is unknown whether a preventive treatment with enalapril may further increase the benefit. METHODS: The International CardioOncology Society-one trial (ICOS-ONE) was a controlled, open-label trial conducted in 21 Italian hospitals. Patients were randomly assigned to two strategies: enalapril in all patients started before chemotherapy (CT; 'prevention' arm), and enalapril started only in patients with an increase in troponin during or after CT ('troponin-triggered' arm)...
May 2018: European Journal of Cancer
https://www.readbyqxmd.com/read/29563292/activation-and-induction-of-antigen-specific-t-follicular-helper-cells-t-fh-play-a-critical-role-in-laiv-induced-human-mucosal-anti-influenza-antibody-response
#16
Abdullah Aljurayyan, Suttida Puksuriwong, Muhammad Ahmed, Ravi Sharma, Madhan Krishnan, Salil Sood, Katherine Davies, Devika Rajashekar, Sam Leong, Paul S McNamara, Stephen Gordon, Qibo Zhang
There is increasing interest recently in developing intranasal vaccines against respiratory tract infections. Antibody response is critical in vaccine-induced protection and TFH is considered important in mediating antibody response. Most data supporting the role for TFH in antibody response are from animal studies, and direct evidence from humans is limited, apart from TFH -like cells in blood. We studied activation and induction of TFH and its role on anti-influenza antibody response by live-attenuated influenza vaccine(LAIV) in human nasopharynx-associated lymphoid tissue(NALT)...
March 21, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29544515/next-generation-of-immune-checkpoint-therapy-in-cancer-new-developments-and-challenges
#17
REVIEW
Julian A Marin-Acevedo, Bhagirathbhai Dholaria, Aixa E Soyano, Keith L Knutson, Saranya Chumsri, Yanyan Lou
Immune checkpoints consist of inhibitory and stimulatory pathways that maintain self-tolerance and assist with immune response. In cancer, immune checkpoint pathways are often activated to inhibit the nascent anti-tumor immune response. Immune checkpoint therapies act by blocking or stimulating these pathways and enhance the body's immunological activity against tumors. Cytotoxic T lymphocyte-associated molecule-4 (CTLA-4), programmed cell death receptor-1 (PD-1), and programmed cell death ligand-1(PD-L1) are the most widely studied and recognized inhibitory checkpoint pathways...
March 15, 2018: Journal of Hematology & Oncology
https://www.readbyqxmd.com/read/29535054/developing-and-validating-a-simple-and-cost-effective-strabismus-surgery-simulator
#18
Temitope Adebayo, Michael Abendroth, Gaytri Gupta Elera, Allen Kunselman, Elizabeth Sinz, Amanda Ely, Amr Elkamshoushy, Ajay Soni
PURPOSE: To demonstrate that a nonbiologic strabismus surgery simulator is not inferior to a biologic wet lab for teaching the key steps of strabismus surgery. METHODS: A total of 41 medical students were randomly assigned to one of two groups: biologic wet lab or nonbiologic simulator. The students trained according to the group's protocol then participated in a recorded final assessment using a realistic strabismus surgery model. Two independent reviewers, masked to training method, graded the video recordings using three scoring systems: the International Council of Ophthalmology Approved-Ophthalmology Surgical Competency Assessment Rubric for Strabismus Surgery (ICO-OSCAR), the Global Rating Scale of Objective Structured Assessment of Technical Skills (OSATS), and the Alphabetic Summary Scale (ASS)...
March 10, 2018: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/29534331/two-independent-studies-show-blood-follicular-t-cell-subsets-allow-the-stratification-of-sj%C3%A3-gren-s-syndrome-patients
#19
Valter R Fonseca, Vasco C Romão, Ana Agua-Doce, João Eurico Fonseca, Luis Graca
We are excited to find that most of our conclusions (1) were replicated in an independent larger primary Sjögren's syndrome (pSS) cohort, as reported by Verstappen et al in their Letter (Verstappen G et al, Arthritis & Rheumatology, in press). Indeed, our colleagues were also able to demonstrate that the ratio of blood T follicular regulatory (Tfr) / T follicular helper (Tfh) cells were increased in pSS patients, and specifically within pSS patients with focus score (FS) ≥ 1, supporting its discriminative value for the diagnosis of pSS...
March 13, 2018: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/29526824/immunohistochemical-and-image-analysis-based-study-demonstrate-that-several-immune-checkpoints-are-co-expressed-in-non-small-cell-lung-carcinoma-tumors
#20
Edwin Roger Parra, Pamela Villalobos, Jiexin Zhang, Carmen Behrens, Barbara Mino, Stephen Swisher, Boris Sepesi, Annika Weissferdt, Neda Kalhor, John Victor Heymach, Cesar Moran, Jianjun Zhang, Jack Lee, Jaime Rodriguez-Canales, Don Gibbons, Ignacio Ivan Wistuba
BACKGROUND: The understanding of immune checkpoint molecules' co-expression in non-small cell lung carcinoma (NSCLC) is important to potentially design combinatorial immunotherapy approaches. MATERIAL AND METHODS: We studied 225 formalin-fixed, paraffin-embedded tumor tissues from stage I-III NSCLCs-142 adenocarcinomas (ADCs) and 83 squamous cell carcinomas (SCCs)-placed in tissue microarrays. Nine immune checkpoint markers were evaluated; 4 (PD-L1, B7-H3, B7-H4, and IDO-1) expressed predominantly in malignant cells (MCs) and 5 (ICOS, VISTA, TIM3, LAG3, and OX40) expressed mostly in stromal tumor-associated inflammatory cells (TAICs)...
March 8, 2018: Journal of Thoracic Oncology
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