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https://www.readbyqxmd.com/read/27919633/greater-activation-of-peripheral-t-follicular-helper-cells-following-high-dose-influenza-vaccine-in-older-adults-forecasts-seroconversion
#1
Mark A Pilkinton, Katherine J Nicholas, Christian M Warren, Rita M Smith, Sandra M Yoder, H Keipp Talbot, Spyros A Kalams
BACKGROUND: Influenza related morbidity and mortality disproportionately impacts older adults. The serologic response to vaccine is diminished in older adults; however, high dose inactivated influenza vaccine (HD IIV) has shown improved rates of seroconversion compared to standard dose (SD IIV). We hypothesize this may be due to the superior ability of high dose vaccine to activate T follicular helper (Tfh) cells and provide B cell dependent T cell help. METHODS: We measured peripheral Tfh (pTfh) activation in 50 community dwelling adults 65years or older who were randomly assigned to receive either the HD IIV or SD IIV...
December 2, 2016: Vaccine
https://www.readbyqxmd.com/read/27896820/ppar%C3%AE-targeted-oral-cancer-treatment-and-additional-utility-of-genomics-analytic-techniques
#2
Nathan Handley, Jacob Eide, Randall Taylor, Beverly Wuertz, Patrick Gaffney, Frank Ondrey
OBJECTIVE: Peroxisome proliferator-activated receptor γ (PPARγ) agonists have been shown to have anti-proliferative, anti-angiogenic, and proapoptotic effects, leading to interest in their use as cancer therapeutics. Pioglitazone, a U.S. Food and Drug Administration-approved type II diabetes medication and PPARγ agonist, may have a role in adjuvant head-and-neck squamous cell carcinoma treatment or prevention. Therefore, the purpose of this study was: 1) to treat oral cavity cancer cells with the PPARγ activator, pioglitazone, to analyze gene expression changes; and 2) to compare those changes with our preexisting genomic data for development of hypothesis-driven additional basic and clinical studies...
November 29, 2016: Laryngoscope
https://www.readbyqxmd.com/read/27895177/ox40-cooperates-with-icos-to-amplify-follicular-th-cell-development-and-germinal-center-reactions-during-infection
#3
Vikas Tahiliani, Tarun E Hutchinson, Georges Abboud, Michael Croft, Shahram Salek-Ardakani
Cognate interactions between T follicular helper (Tfh) cells and B cells are essential for promoting protective Ab responses. Whereas costimulatory receptors such as ICOS are accepted as being important for the induction of Tfh cell fate decision, other molecules may play key roles in amplifying or maintaining the Tfh phenotype. In this study, with vaccinia virus infection in mice, we show that OX40 was expressed on Tfh cells that accumulated at the T/B borders in the white pulp of the spleen and that OX40-dependent signals directly shaped the magnitude and quality of the their response to viral Ags...
November 28, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27878564/the-role-of-b7-family-costimulatory-molecules-and-indoleamine-2-3-dioxygenase-in-primary-sj%C3%A3-gren-s-syndrome-and-systemic-sclerosis
#4
Nóra Legány, László Berta, László Kovács, Attila Balog, Gergely Toldi
B7 costimulatory molecules are present on antigen-presenting cells (APCs) and influence intracellular expression of indoleamine 2,3-dioxygenase (IDO), a molecule with important immunoregulatory functions. We determined the frequency of activated (CD11b+) monocytes expressing B7-1, B7-2, B7-H1, and B7-H2 molecules, and that of CD3+ and CD4+ T cells expressing the corresponding CD28, CTLA-4, PD-1, and ICOS receptors in peripheral blood samples of 20 healthy adults and 9 SSc and 15 pSS patients using flow cytometry...
November 23, 2016: Immunologic Research
https://www.readbyqxmd.com/read/27871606/a-novel-algorithm-for-spectral-interval-combination-optimization
#5
Xiangzhong Song, Yue Huang, Hong Yan, Yanmei Xiong, Shungeng Min
In this study, a new wavelength interval selection algorithm named as interval combination optimization (ICO) was proposed under the framework of model population analysis (MPA). In this method, the full spectra are divided into a fixed number of equal-width intervals firstly. Then the optimal interval combination is searched iteratively under the guide of MPA in a soft shrinkage manner, among which weighted bootstrap sampling (WBS) is employed as random sampling method. Finally, local search is conducted to optimize the widths of selected intervals...
December 15, 2016: Analytica Chimica Acta
https://www.readbyqxmd.com/read/27870546/integrated-care-organizations-medicare-financing-for-care-at-home
#6
Karen Davis, Amber Willink, Cathy Schoen
OBJECTIVES: As the boomer population ages, there is a growing need for integrated care organizations (ICOs) that can integrate both medical care and long-term services and supports in the home. This paper presents a policy proposal to support the creation of ICOs, redesign care, and provide financing for home- and community-based services (HCBS), with the goal of enhancing financial protection for beneficiaries, coordinating care, and preventing costly hospital and nursing home use. METHODS: This study used the 2012 Medicare Current Beneficiary Survey (MCBS) Cost and Use File, inflated to 2016 figures, to describe the characteristics of Medicare beneficiaries and their healthcare utilization and spending...
November 2016: American Journal of Managed Care
https://www.readbyqxmd.com/read/27865860/human-regulatory-b-cells-control-tfh-response
#7
Achouak Achour, Quentin Simon, Audrey Mohr, Jean-François Séité, Pierre Youinou, Boutahar Bendaoud, Ibtissem Ghedira, Jacques-Olivier Pers, Christophe Jamin
BACKGROUND: Follicular helper T (Tfh) cells support the terminal B-cell differentiation. Human regulatory B (Breg) cells modulate cellular responses but their control of Tfh-dependent humoral immune responses is unknown. OBJECTIVE: To assess the role of Breg cells on Tfh development and function. METHODS: Human T cells were polyclonally stimulated in the presence of IL-12 and IL-21 to generate Tfh cells. They were co-cultured with B cells to induce their terminal differentiation...
November 16, 2016: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/27863842/development-of-t-follicular-helper-cells-and-their-role-in-disease-and-immune-system
#8
REVIEW
Sadegh Eivazi, Salman Bagheri, Mohammad Sadegh Hashemzadeh, Majdedin Ghalavand, Elmira Safaie Qamsari, Ruhollah Dorostkar, Maryam Yasemi
The T follicular helper cells (TFH) are a subset of CD4+ T cells specialized to regulate antibody responses. The production of these cells is associated with the dendritic cells (DCs) and B cells. TFH cells help B cells form germinal centers (GC) differentiate into memory and plasma cells (antibody-secreting cells) as humoral responses. In addition, there is strong evidence that TFH cells play a pivotal role in the development of long-lived humoral immunity. Molecular factors such as transcription factors, surface receptors, cytokine and micro RNAs are involved in the formation of TFH cells...
November 15, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27859053/b-cell-intrinsic-function-of-tapp-adaptors-in-controlling-germinal-center-responses-and-autoantibody-production-in-mice
#9
Nipun Jayachandran, Ivan Landego, Sen Hou, Dario R Alessi, Aaron J Marshall
Control of B-cell signal transduction is critical to prevent production of pathological autoantibodies. Tandem PH domain containing proteins (TAPPs) specifically bind PI(3,4)P2, a phosphoinositide product generated by PI 3-kinases and the phosphatase SHIP. TAPP KI mice bearing PH domain-inactivating mutations in both TAPP1 and TAPP2 genes, uncoupling them from PI(3,4)P2, exhibit increased BCR-induced activation of the kinase Akt and develop lupus-like characteristics including anti-DNA antibodies and deposition of immune complexes in kidneys...
November 15, 2016: European Journal of Immunology
https://www.readbyqxmd.com/read/27844022/near-vision-examination-in-presbyopia-patients-do-we-need-good-homologated-near-vision-charts
#10
REVIEW
Wolfgang Radner
Presbyopia correction is mainly concerned with the goal of regaining an uncorrected reading performance. Since historic reading charts do not provide a unique standard that is applicable for the analysis of clinical and scientific reading performance, new standardized reading charts have been developed, in order to provide reading performance analyses analogous to modern single-optotype distance acuity measurements: the Bailey-Lovie Word Reading Chart, the Colenbrander English Continuous Text Near Vision Cards, the MNREAD Charts, and the RADNER Reading Charts...
2016: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/27819282/characterization-of-t-follicular-helper-cells-in-allogeneic-normal-pregnancy-and-pdl1-blockage-induced-abortion
#11
Weihong Zeng, Zhicui Liu, Siming Zhang, Jiabin Ren, Xiaoling Ma, Chuanmei Qin, Fuju Tian, Yan Zhang, Yi Lin
A deeper understanding of the immunological events during pregnancy will provide novel insights into the pathogenesis of pregnancy complications. The fundamental function of T follicular helper (Tfh) cells is to provide cognate help to B cells. Dysregulations of Tfh-cell function and/or development can result in various immunological diseases. However, the role and characteristics of Tfh cells during pregnancy remain unknown. Herein, an allogeneic-normal-pregnant mouse model was used, and we found that the CD4(+) T cells residing at the uterus and placenta (UP) displayed a Tfh-like phenotype; and the UP-derived CD4(+)CXCR5(hi)PD-1(hi) and CD4(+)CXCR5(hi)ICOS(hi) Tfh cells, which showed a memory/activation phenotype, reached their peak at mid-pregnancy...
November 7, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27818202/the-expression-of-bcl-6-in-circulating-follicular-helper-like-t-cells-positively-correlates-with-the-disease-activity-in-systemic-lupus-erythematosus
#12
Xin Huang, Haijing Wu, Hong Qiu, Huilan Yang, Yaxiong Deng, Ming Zhao, Hairong Luo, Xiang Zhou, Yubin Xie, Vera Chan, Chak-Sing Lau, Qianjin Lu
Increased circulating follicular helper-like T cells (cTfh) are reported in systemic lupus erythematosus (SLE) patients. However, whether B-cell lymphoma 6 (Bcl-6) is expressed in cTfh cells remains to be clarified. In this study, we found that the frequencies of CD4(+)CXCR5(hi)PD-1(hi)cTfh, CD4(+)CXCR5(hi)PD-1(hi)ICOS(hi), and CD4(+)CXCR5(hi)PD-1(hi)Bcl-6(+) populations were significantly increased in SLE patients (n=70) when compared with healthy controls (n=48). Surprisingly, only CD4(+)CXCR5(hi)PD-1(hi)Bcl-6(+) cTfh cells, rather than CD4(+)CXCR5(hi)PD-1(hi) population, were positively correlated with SLEDAI and anti-dsDNA antibodies...
November 3, 2016: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/27815556/utility-of-the-necpal-ccoms-ico%C3%A2-tool-and-the-surprise-question-as-screening-tools-for-early-palliative-care-and-to-predict-mortality-in-patients-with-advanced-chronic-conditions-a-cohort-study
#13
Xavier Gómez-Batiste, Marisa Martínez-Muñoz, Carles Blay, Jordi Amblàs, Laura Vila, Xavier Costa, Joan Espaulella, Alicia Villanueva, Ramon Oller, Joan Carles Martori, Carles Constante
BACKGROUND: The Surprise Question (SQ) identifies patients with palliative care needs. The NECPAL CCOMS-ICO(©) (NECPAL) tool combines the Surprise Question with additional clinical parameters for a more comprehensive assessment. The capacity of these screening tools to predict mortality is still unknown. AIM: To explore the predictive validity of the NECPAL and SQ to determine 12- to 24-month mortality. DESIGN: Longitudinal, prospective and observational cohort study...
November 4, 2016: Palliative Medicine
https://www.readbyqxmd.com/read/27812214/ifnar1-signalling-obstructs-icos-mediated-humoral-immunity-during-non-lethal-blood-stage-plasmodium-infection
#14
Ismail Sebina, Kylie R James, Megan S F Soon, Lily G Fogg, Shannon E Best, Fabian de Labastida Rivera, Marcela Montes de Oca, Fiona H Amante, Bryce S Thomas, Lynette Beattie, Fernando Souza-Fonseca-Guimaraes, Mark J Smyth, Paul J Hertzog, Geoffrey R Hill, Andreas Hutloff, Christian R Engwerda, Ashraful Haque
Parasite-specific antibodies protect against blood-stage Plasmodium infection. However, in malaria-endemic regions, it takes many months for naturally-exposed individuals to develop robust humoral immunity. Explanations for this have focused on antigenic variation by Plasmodium, but have considered less whether host production of parasite-specific antibody is sub-optimal. In particular, it is unclear whether host immune factors might limit antibody responses. Here, we explored the effect of Type I Interferon signalling via IFNAR1 on CD4+ T-cell and B-cell responses in two non-lethal murine models of malaria, P...
November 2016: PLoS Pathogens
https://www.readbyqxmd.com/read/27800130/the-association-between-viral-infections-and-co-stimulatory-gene-polymorphisms-in-kidney-transplant-outcomes
#15
Ahmad Niknam, Mohammad Hossein Karimi, Ramin Yaghobi, Bita Geramizadeh, Jamshid Roozbeh, Mehdi Salehipour, Mahdiyar Iravani
BACKGROUND: The surveillance of kidney transplant patients depends on function of different immunologic markers like co-stimulatory molecules. These molecules may also be associated with post kidney transplant viral related outcomes. OBJECTIVES: The aim of this study was to investigate the possible associations between co-stimulatory molecule gene polymorphisms and viral infections in kidney transplant patients. PATIENTS AND METHODS: In total, 172 kidney transplant patients were included in this study...
August 2016: Jundishapur Journal of Microbiology
https://www.readbyqxmd.com/read/27798169/germinal-center-hypoxia-potentiates-immunoglobulin-class-switch-recombination
#16
Robert K Abbott, Molly Thayer, Jasmine Labuda, Murillo Silva, Phaethon Philbrook, Derek W Cain, Hidefumi Kojima, Stephen Hatfield, Shalini Sethumadhavan, Akio Ohta, Ellis L Reinherz, Garnett Kelsoe, Michail Sitkovsky
Germinal centers (GCs) are anatomic sites where B cells undergo secondary diversification to produce high-affinity, class-switched Abs. We hypothesized that proliferating B cells in GCs create a hypoxic microenvironment that governs their further differentiation. Using molecular markers, we found GCs to be predominantly hypoxic. Compared to normoxia (21% O2), hypoxic culture conditions (1% O2) in vitro accelerated class switching and plasma cell formation and enhanced expression of GL-7 on B and CD4(+) T cells...
November 15, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27798154/icos-ligand-triggering-impairs-osteoclast-differentiation-and-function-in-vitro-and-in-vivo
#17
Casimiro L Gigliotti, Elena Boggio, Nausicaa Clemente, Yogesh Shivakumar, Erika Toth, Daniele Sblattero, Patrizia D'Amelio, Giovanni C Isaia, Chiara Dianzani, Junji Yagi, Josè M Rojo, Annalisa Chiocchetti, Renzo Boldorini, Michela Bosetti, Umberto Dianzani
Osteoblasts, osteocytes, and osteoclasts (OCs) are involved in the bone production and resorption, which are crucial in bone homeostasis. OC hyperactivation plays a role in the exaggerated bone resorption of diseases such as osteoporosis, rheumatoid arthritis, and osteolytic tumor metastases. This work stems from the finding that OCs can express B7h (ICOS-Ligand), which is the ligand of the ICOS T cell costimulatory molecule. Because recent reports have shown that, in endothelial, dendritic, and tumor cells, B7h triggering modulates several activities of these cells, we analyzed the effect of B7h triggering by recombinant ICOS-Fc on OC differentiation and function...
October 19, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27797919/%C3%AE-e%C3%AE-7-integrin-identifies-subsets-of-pro-inflammatory-colonic-cd4-t-lymphocytes-in-ulcerative-colitis
#18
Christopher A Lamb, John C Mansfield, Gaik W Tew, Deena Gibbons, Anna K Long, Peter Irving, Lauri Diehl, Jeff Eastham-Anderson, Maria B Price, Graeme O'Boyle, David E J Jones, Sharon O'Byrne, Adrian Hayday, Mary E Keir, Jackson G Egen, John A Kirby
BACKGROUND AND AIMS: The αEβ7 integrin is crucial for retention of T lymphocytes at mucosal surfaces through its interaction with E-cadherin. Pathogenic or protective functions of these cells during human intestinal inflammation, such as ulcerative colitis (UC) have not previously been defined, with understanding largely derived from animal model data. Defining this phenotype in human samples is important for understanding UC pathogenesis and is of translational importance for therapeutic targeting of αEβ7:E-cadherin interactions...
October 20, 2016: Journal of Crohn's & Colitis
https://www.readbyqxmd.com/read/27791955/literature-mining-gene-set-enrichment-and-pathway-analysis-for-target-identification-in-beh%C3%A3-et-s-disease
#19
Paul Wilson, Christopher Larminie, Rona Smith
OBJECTIVES: To use literature mining to catalogue Behçet's associated genes, and advanced computational methods to improve the understanding of the pathways and signalling mechanisms that lead to the typical clinical characteristics of Behçet's patients. To extend this technique to identify potential treatment targets for further experimental validation. METHODS: Text mining methods combined with gene enrichment tools, pathway analysis and causal analysis algorithms...
September 2016: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/27777979/the-head-and-neck-cancer-immune-landscape-and-its-immunotherapeutic-implications
#20
Rajarsi Mandal, Yasin Şenbabaoğlu, Alexis Desrichard, Jonathan J Havel, Martin G Dalin, Nadeem Riaz, Ken-Wing Lee, Ian Ganly, A Ari Hakimi, Timothy A Chan, Luc G T Morris
Recent clinical trials have demonstrated a clear survival advantage in advanced head and neck squamous cell carcinoma (HNSCC) patients treated with immune checkpoint blockade. These emerging results reveal that HNSCC is one of the most promising frontiers for immunotherapy research. However, further progress in head and neck immuno-oncology will require a detailed understanding of the immune infiltrative landscape found in these tumors. We leveraged transcriptome data from 280 tumors profiled by The Cancer Genome Atlas (TCGA) to comprehensively characterize the immune landscape of HNSCC in order to develop a rationale for immunotherapeutic strategies in HNSCC and guide clinical investigation...
October 20, 2016: JCI Insight
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