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T cell immunology

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https://www.readbyqxmd.com/read/29341450/characterization-of-a-novel-papain-inducible-murine-model-of-eosinophilic-rhinosinusitis
#1
Anuj Tharakan, Alex Dobzanski, Nyall R London, Syed M Khalil, Nitya Surya, Andrew P Lane, Murugappan Ramanathan
BACKGROUND: Eosinophilic chronic rhinosinusitis (ECRS) is a disease characterized by eosinophilic inflammatory infiltrate and a local type 2 cytokine milieu. Current animal models fail to recapitulate many of the innate and adaptive immunologic hallmarks of the disease, thus hindering the development of effective therapeutics. In the present study, mice were exposed intranasally to the cysteine protease papain, which shares functional similarities with parasitic proteases and aeroallergens, to generate a rapidly inducible murine model of eosinophilic rhinosinusitis...
January 17, 2018: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/29341423/variable-immune-deficiency-related-to-deletion-size-in-chromosome-22q11-2-deletion-syndrome
#2
Blaine Crowley, Melanie Ruffner, Donna M McDonald McGinn, Kathleen E Sullivan
The clinical features of 22q11.2 deletion syndrome include virtually every organ of the body. This review will focus on the immune system and the differences related to deletion breakpoints. A hypoplastic thymus was one of the first features described in this syndrome and low T cell counts, as a consequence of thymic hypoplasia, are the most commonly described immunologic feature. These are most prominently seen in early childhood and can be associated with increased persistence of viruses. Later in life, evidence of T cell exhaustion may be seen and secondary deficiencies of antibody function have been described...
January 17, 2018: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/29341339/immunomodulation-by-therapeutic-mesenchymal-stromal-cells-msc-is-triggered-through-phagocytosis-of-msc-by-monocytic-cells
#3
Samantha F H de Witte, Franka Luk, Jesus M Sierra Parraga, Madhu Gargesha, Ana Merino, Sander S Korevaar, Anusha S Shankar, Lisa O'Flynn, Steve J Elliman, Debashish Roy, Michiel G H Betjes, Philip N Newsome, Carla C Baan, Martin J Hoogduijn
Mesenchymal stem or stromal cells (MSC) are under investigation as a potential immunotherapy. MSC are usually administered via intravenous infusion, after which they are trapped in the lungs and die and disappear within a day. The fate of MSC after their disappearance from the lungs is unknown and it is unclear how MSC realize their immunomodulatory effects in their short lifespan. We examined immunological mechanisms determining the fate of infused MSC and the immunomodulatory response associated with it. Tracking viable and dead human umbilical cord MSC (ucMSC) in mice using Qtracker beads (contained in viable cells) and Hoechst33342 (staining all cells) revealed that viable ucMSC were present in the lungs immediately after infusion...
January 17, 2018: Stem Cells
https://www.readbyqxmd.com/read/29340006/the-impact-of-the-progressive-efficiency-test-on-a-rowing-ergometer-on-white-blood-cells-distribution-and-clinical-chemistry-changes-in-paralympic-rowers-during-the-preparatory-stage-before-the-paralympic-games-in-rio-2016-a-case-report
#4
Robert Nowak, Rafał Buryta, Krzysztof Krupecki, Tomasz Zając, Marek Zawartka, Patrizia Proia, Dorota Kostrzewa-Nowak
There is a large gap in knowledge regarding research on post-exercise blood changes in disabled athletes. There are relatively few data on adaptive mechanisms to exercise in disabled athletes, including disabled rowers. Two rowers from a Polish adaptive rowing settle TAMix2x that qualified for the Paralympic Games in Rio, 2016 took part in this study. They performed a progressive test on a rowing ergometer until exhaustion. The cardiorespiratory fitness measures, complete blood count, white blood cells' distribution and 30 clinical chemistry variables describing laboratory diagnostic profiles and general health were determined...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29339440/repurposing-tin-mesoporphyrin-as-an-immune-checkpoint-inhibitor-shows-therapeutic-efficacy-in-preclinical-models-of-cancer
#5
Tamara Muliaditan, James W Opzoomer, Jonathan Caron, Mary Okesola, Paris Kosti, Sharanpreet Lall, Mieke Van Hemelrijck, Francesco Dazzi, Andrew Tutt, Anita Grigoriadis, Cheryl Gillett, Stephen F Madden, Joy M Burchell, Shahram Kordasti, Sandra S Diebold, James Spicer, James N Arnold
PURPOSE: Unprecedented clinical outcomes have been achieved in a variety of cancers by targeting immune checkpoint molecules. This preclinical study investigates heme oxygenase-1 (HO-1), an immune suppressive enzyme that is expressed in a wide variety of cancers, as a potential immune checkpoint target in the context of a chemotherapy-elicited anti-tumor immune response. We evaluate repurposing tin mesoporphyrin (SnMP), which has demonstrated safety and efficacy targeting hepatic HO in the clinic for the treatment of hyperbilirubinaemia, as an immune checkpoint blockade therapy for the treatment of cancer...
January 16, 2018: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/29339270/proceedings-from-the-fourth-haploidentical-stem-cell-transplantation-symposium-haplo2016-san-diego-california-december-1-2016
#6
REVIEW
Monzr Al Malki, Richard Jones, Qing Ma, Dean Lee, Yair Reisner, Jeffrey S Miller, Peter Lang, Suradej Hongeng, Parameswaran Hari, Samuel Strober, Jianhua Yu, Richard Maziarz, Domenico Mavilio, Denis-Claude Roy, Chiara Bonini, Richard E Champlin, Ephraim J Fuchs, Stefan O Ciurea
The resurgence of haploidentical stem cell transplantation (HaploSCT) over the last decade is one of the most important advances in the field of hematopoietic stem cell transplantation (HSCT). The modified platforms of T cell depletion either ex vivo (CD34+ selection, 'mega-dose' of purified CD34+ cells, or selective depletion of T-cells) or newer platforms of in vivo depletion of T cells, with either post-transplant high-dose cyclophosphamide (PTCy) or intensified immune suppression, have contributed to better outcomes, with survival that is similar to HLA-match donor transplantation...
January 12, 2018: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/29338031/pre-existing-malignancy-results-in-increased-prevalence-of-distinct-populations-of-cd4-t-cells-during-sepsis
#7
Jianfeng Xie, Jennifer M Robertson, Ching-Wen Chen, Wenxiao Zhang, Craig M Coopersmith, Mandy L Ford
The presence of pre-existing malignancy in murine hosts results in increased immune dysregulation and risk of mortality following a septic insult. Based on the known systemic immunologic changes that occur in cancer hosts, we hypothesized that the presence of pre-existing malignancy would result in phenotypic and functional changes in CD4+ T cell responses following sepsis. In order to conduct a non-biased, unsupervised analysis of phenotypic differences between CD4+ T cell compartments, cohorts of mice were injected with LLC1 tumor cells and tumors were allowed to grow for 3 weeks...
2018: PloS One
https://www.readbyqxmd.com/read/29337067/the-impact-of-growth-factors-on-human-induced-pluripotent-stem-cells-differentiation-into-cardiomyocytes
#8
Marianne E Yassa, Iman A Mansour, Nadia I Sewelam, Hala Hamza, Taghrid Gaafar
Human induced pluripotent stem cells (hiPSCs) act as a promising therapeutic alternative for cardiovascular diseases. They yield a large number of functional cardiomyocytes (CMs) from autologous cell sources without ethical or immunological problems. However, significant limitations still remain in terms of line-to-line variability in CM yield and reproducibility. AIM: To efficiently enhance NP0040 hiPSCs differentiation into CMs. MAIN METHODS: Following a standard cardiac differentiation protocol using small molecules targeting the canonical Wnt signaling, growth factors (BMP4 and FGF2) and ascorbic acid were added further in order to increase the cardiac differentiation efficiency...
January 11, 2018: Life Sciences
https://www.readbyqxmd.com/read/29336054/the-eaaci-ga%C3%A2-len-edf-wao-guideline-for-the-definition-classification-diagnosis-and-management-of-urticaria-the-2017-revision-and-update
#9
T Zuberbier, W Aberer, R Asero, A H Abdul Latiff, D Baker, B Ballmer-Weber, J A Bernstein, C Bindslev-Jensen, Z Brzoza, R Buense Bedrikow, G W Canonica, M K Church, T Craig, I V Danilycheva, C Dressler, L F Ensina, A Giménez-Arnau, K Godse, M Gonçalo, C Grattan, J Hebert, M Hide, A Kaplan, A Kapp, C H Katelaris, E Kocatürk, K Kulthanan, D Larenas-Linnemann, T A Leslie, M Magerl, P Mathelier-Fusade, R Y Meshkova, M Metz, A Nast, E Nettis, H Oude-Elberink, S Rosumeck, S S Saini, M Sánchez-Borges, P Schmid-Grendelmeier, P Staubach, G Sussman, E Toubi, G A Vena, C Vestergaard, B Wedi, R N Werner, Z Zhao, M Maurer
This evidence and consensus-based guideline was developed following the methods recommended by Cochrane and the Grading of Recommendations Assessment, Development and Evaluation (GRADE) working group. The conference was held on December 1st, 2016. It is a joint initiative of the Dermatology Section of the European Academy of Allergology and Clinical Immunology (EAACI), the EU-founded network of excellence, the Global Allergy and Asthma European Network (GA²LEN), the European Dermatology Forum (EDF), and the World Allergy Organization (WAO) with the participation of 48 delegates of 42 national and international societies...
January 15, 2018: Allergy
https://www.readbyqxmd.com/read/29335855/t-cell-responses-to-tumor-how-dominant-assumptions-on-immune-activity-led-to-a-neglect-of-pathological-functions-and-how-evolutionary-considerations-can-help-identify-testable-hypotheses-for-improving-immunotherapy
#10
REVIEW
Marinos Kallikourdis
Cancer immunotherapy is based on the premise that activated, pro-inflammatory T cell responses to tumor will mostly combat tumor growth. Nowadays accepted as largely valid, this hypothesis has been formed as a result of extensive theoretical and experimental argumentation on the inherent function of the immune system and the nature of the immunological self, dating back to the foundations of immunology. These arguments have also been affected by how current working hypotheses were set by researchers, an issue that has been the focus of study by medical anthropologists...
January 15, 2018: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/29334915/monitoring-the-responsiveness-of-t-and-antigen-presenting-cell-compartments-in-breast-cancer-patients-is-useful-to-predict-clinical-tumor-response-to-neoadjuvant-chemotherapy
#11
David A Bernal-Estévez, Oscar García, Ramiro Sánchez, Carlos A Parra-López
BACKGROUND: Vaccination of mice with tumors treated with Doxorubicin promotes a T cell immunity that relies on dendritic cell (DC) activation and is responsible for tumor control in vaccinated animals. Despite Doxorubicin in combination with Cyclophosphamide (A/C) is widely used to treat breast cancer patients, the stimulating effect of A/C on T and APC compartments and its correlation with patient's clinical response remains to be proved. METHODS: In this prospective study, we designed an in vitro system to monitor various immunological readouts in PBMCs obtained from a total of 17 breast cancer patients before, and after neoadjuvant anti-tumor therapy with A/C...
January 15, 2018: BMC Cancer
https://www.readbyqxmd.com/read/29334492/anti-il-10-mediated-enhancement-of-antitumor-efficacy-of-a-dendritic-cell-targeting-mip3%C3%AE-gp100-vaccine-in-the-b16f10-mouse-melanoma-model-is-dependent-on-type-i-interferons
#12
James T Gordy, Kun Luo, Brian Francica, Charles Drake, Richard B Markham
The chemokine MIP3α (CCL20) binds to CCR6 on immature dendritic cells. Vaccines fusing MIP3α to gp100 have been shown to be effective in therapeutically reducing melanoma tumor burden and prolonging survival in a mouse model. Other studies have provided evidence that interleukin-10 (IL-10) neutralizing antibodies (αIL-10) enhance immunologic melanoma therapies by modulating the tolerogenic tumor microenvironment. In the current study, we have utilized the B16F10 syngeneic mouse melanoma model to demonstrate for the first time that a therapy neutralizing IL-10 enhances the antitumor efficacy of a MIP3α-gp100 DNA vaccine, leading to significantly smaller tumors, slower growing tumors, and overall increases in mouse survival...
January 12, 2018: Journal of Immunotherapy
https://www.readbyqxmd.com/read/29334374/transitory-presence-of-myeloid-derived-suppressor-cells-in-neonates-is-critical-for-control-of-inflammation
#13
Yu-Mei He, Xing Li, Michela Perego, Yulia Nefedova, Andrew V Kossenkov, Erik A Jensen, Valerian Kagan, Yu-Feng Liu, Shu-Yu Fu, Qing-Jian Ye, Yan-Hong Zhou, Lai Wei, Dmitry I Gabrilovich, Jie Zhou
Myeloid-derived suppressor cells (MDSCs) are pathologically activated and relatively immature myeloid cells that have been implicated in the immunological regulation of many pathologic conditions. Phenotypically and morphologically, MDSCs are similar to neutrophils (PMN-MDSCs) and monocytes (M-MDSCs). However, they have potent suppressive activity and distinct gene expression profiles and biochemical characteristics. No or very few MDSCs are observed in steady-state physiological conditions. Therefore, until recently, accumulation of MDSCs was considered a consequence of pathological processes or pregnancy...
January 15, 2018: Nature Medicine
https://www.readbyqxmd.com/read/29332705/cutaneous-squamous-cell-carcinoma-management-of-advanced-and-high-stage-tumors
#14
REVIEW
Syril Keena T Que, Fiona O Zwald, Chrysalyne D Schmults
While the majority of cutaneous squamous cell carcinomas (cSCCs) can be treated surgically, the additional work-up and treatments indicated for high-risk cSCC remain undefined. In recent years, improvements in tumor staging systems have allowed for the more accurate stratification of tumors into high- and low-risk categories. This insight, along with the publication of cSCC guidelines, brings us closer to the development of a consensus approach. The second article in this continuing medical education series addresses in question and answer format the most common questions related to advanced and high-stage cSCCs, with a simplified flowchart...
February 2018: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/29331587/il-23-il-17-immune-axis-in-guillain-barr%C3%A3-syndrome-exploring-newer-vistas-for-understanding-pathobiology-and-therapeutic-implications
#15
REVIEW
Monojit Debnath, Madhu Nagappa, Geetanjali Murari, Arun B Taly
Guillain Barré Syndrome (GBS) is a severe disorder of the peripheral nervous system with an inadequately known etiopathology. It is a post infectious immune mediated disorder, characterized by autoantibody production, complement activation as well as T reactivity against gangliosides. However, the precise etiopathogenesis remains poorly understood in a majority of the patients. Th17 cells, a recently identified lineage of Th cells have emerged as a predominant inducer of autoimmunity and inflammation in various immunological disorders...
January 10, 2018: Cytokine
https://www.readbyqxmd.com/read/29331565/saroglitazar-reduces-obesity-and-associated-inflammatory-consequences-in-murine-adipose-tissue
#16
Durgesh Kumar, Umesh Kumar Goand, Sanchita Gupta, Kripa Shankar, Salil Varshney, Sujith Rajan, Ankita Srivastava, Abhishek Gupta, Achchhe Lal Vishwakarma, Anurag Kumar Srivastava, Anil N Gaikwad
Prevailing knowledge links chronic low-grade inflammation in the adipose tissue to obesity and its associated metabolic complications. In this study, we evaluated immunometabolic effects of a recently launched dual peroxisome proliferator-activated receptor (PPAR) α & γ agonist 'Saroglitazar' in a mouse model of diet-induced obesity (DIO). Body composition analysis revealed that saroglitazar treatment promoted hepatic weight gain, while attenuated epididymal white adipose tissue (eWAT) mass in DIO. In the eWAT of saroglitazar treated mice, histological analysis showed reduced adipocyte hypertrophy and matrix deposition (picrosirius red staining)...
January 10, 2018: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29331367/molecular-characterization-and-differential-expression-analysis-of-interleukin-1%C3%AE-from-ovis-aries
#17
Yi-Ming Shui, Shi-Ying Lu, Xing Guo, Xi-Lin Liu, Bao-Quan Fu, Pan Hu, Lin-Lin Qu, Nan-Nan Liu, Yan-Song Li, Lu-Lu Wang, Fei-Fei Zhai, Dan-Di Ju, Zeng-Shan Liu, Yu Zhou, Hong-Lin Ren
The interleukin-1 family is an important component of the innate immune system and plays an important role in regulating immune responses on the invasion of intracellular parasites in the acquired immune system. Interleukin 1β (IL-1β) is one of the members of the IL-1 family that predominantly activates downstream signaling pathways to play immunological functions of stimulating T and B lymphocyte activation and promoting the various syntheses of inflammatory substances in conjunction with other cytokines...
January 10, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29331323/regulation-of-inflammatory-factors-by-double-stranded-rna-receptors-in-breast-cancer-cells
#18
Amritha Venkatesh, Harika Nandigam, Maria Muccioli, Manindra Singh, Tiffany Loftus, Deana Lewis, Michelle Pate, Fabian Benencia
Malignant cells are not the only components of a tumor mass since other cells (e.g., fibroblasts, infiltrating leukocytes and endothelial cells) are also part of it. In combination with the extracellular matrix, all these cells constitute the tumor microenvironment. In the last decade the role of the tumor microenvironment in cancer progression has gained increased attention and prompted efforts directed to abrogate its deleterious effects on anti-cancer therapies. The immune system can detect and attack tumor cells, and tumor-infiltrating lymphocytes (particularly CD8 T cells) have been associated with improved survival or better response to therapies in colorectal, melanoma, breast, prostate and ovarian cancer patients among others...
November 22, 2017: Immunobiology
https://www.readbyqxmd.com/read/29330750/immunologic-and-gene-expression-profiles-of-spontaneous-canine-oligodendrogliomas
#19
Anna Filley, Mario Henriquez, Tanmoy Bhowmik, Brij Nath Tewari, Xi Rao, Jun Wan, Margaret A Miller, Yunlong Liu, R Timothy Bentley, Mahua Dey
Malignant glioma (MG), the most common primary brain tumor in adults, is extremely aggressive and uniformly fatal. Several treatment strategies have shown significant preclinical promise in murine models of glioma; however, none have produced meaningful clinical responses in human patients. We hypothesize that introduction of an additional preclinical animal model better approximating the complexity of human MG, particularly in interactions with host immune responses, will bridge the existing gap between these two stages of testing...
January 12, 2018: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/29329625/immune-development-and-performance-characteristics-of-romney-sheep-selected-for-either-resistance-or-resilience-to-gastrointestinal-nematodes
#20
A W Greer, J L McKenzie, R W McAnulty, J F Huntley, T N McNeilly
Immunological and performance characteristics were explored in Romney sheep from lines selected for either resistance or resilience to parasite infection. At a mean 78 days-of-age, twin lambs from a line selected for resistance (RT) and lambs from a line selected for resilience (RL) were infected with the intestinal nematode Trichostrongylus colubriformis for 100 days (I) while their twin remained as an uninfected control (C). Compared with RL, RT animals had lower levels of circulating CD4+ T-cells (P = 0...
January 30, 2018: Veterinary Parasitology
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