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Immune system modeling

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https://www.readbyqxmd.com/read/28340374/ebola-virus-persistence-as-a-new-focus-in-clinical-research
#1
REVIEW
Katie Caviness, Jens H Kuhn, Gustavo Palacios
Ebola virus (EBOV) causes severe acute human disease with high lethality. Viremia is typical during the acute disease phase. However, EBOV RNA can remain detectable in immune-privileged tissues for prolonged periods of time after clearance from the blood, suggesting EBOV may persist during convalescence and thereafter. Eliminating persistent EBOV is important to ensure full recovery of survivors and decrease the risk of outbreak re-ignition caused by EBOV spread from apparently healthy survivors to naive contacts...
March 21, 2017: Current Opinion in Virology
https://www.readbyqxmd.com/read/28340336/a-dna-based-t-cell-receptor-reveals-a-role-for-receptor-clustering-in-ligand-discrimination
#2
Marcus J Taylor, Kabir Husain, Zev J Gartner, Satyajit Mayor, Ronald D Vale
A T cell mounts an immune response by measuring the binding strength of its T cell receptor (TCR) for peptide-loaded MHCs (pMHC) on an antigen-presenting cell. How T cells convert the lifetime of the extracellular TCR-pMHC interaction into an intracellular signal remains unknown. Here, we developed a synthetic signaling system in which the extracellular domains of the TCR and pMHC were replaced with short hybridizing strands of DNA. Remarkably, T cells can discriminate between DNA ligands differing by a single base pair...
March 23, 2017: Cell
https://www.readbyqxmd.com/read/28339952/value-of-multidisciplinary-reassessment-in-attribution-of-neuropsychiatric-events-to-systemic-lupus-erythematosus-prospective-data-from-the-leiden-npsle-cohort
#3
César Magro-Checa, Els J Zirkzee, Liesbeth J J Beaart-van de Voorde, Huub A Middelkoop, Nic J van der Wee, Menno V Huisman, Jeroen Eikenboom, Nyika D Kruyt, Mark A van Buchem, Tom W J Huizinga, Gerda M Steup-Beekman
Objective.: To determine the contribution of reassessment in the attribution process of neuropsychiatric (NP) events to SLE or other aetiologies in a large, prospective and multidisciplinary assessed NPSLE cohort and to compare these results with other available attribution models for NP events occurring in SLE. Methods.: Three hundred and four consecutive SLE patients presenting NP events were evaluated. All subjects underwent standardized multidisciplinary medical, neuropsychological, laboratory and radiological examination on the inclusion and reassessment dates...
February 28, 2017: Rheumatology
https://www.readbyqxmd.com/read/28339788/intravenous-dendritic-cell-administration-enhances-suppression-of-lung-metastasis-induced-by-carbon-ion-irradiation
#4
Ken Ando, Hidetoshi Fujita, Akihiro Hosoi, Liqiu Ma, Masaru Wakatsuki, Ken-Ichiro Seino, Kazuhiro Kakimi, Takashi Imai, Takashi Shimokawa, Takashi Nakano
Carbon-ion radiotherapy (CIRT) is an advanced radiotherapy and has achieved good local control, even in tumors that are resistant to conventional photon beam radiotherapy (PBRT). However, distant metastasis control is an important issue. Recently, the combination of radiotherapy and immunotherapy has attracted the attention. In immunotherapy, dendritic cells (DCs) play a pivotal role in the anti-tumor immune system. However, the mechanisms underlying the combination therapy of DCs and radiotherapy have been unclear...
February 27, 2017: Journal of Radiation Research
https://www.readbyqxmd.com/read/28339682/the-effects-of-interleukin-2-on-immune-response-regulation
#5
Ryan S Waters, Justin S A Perry, SunPil Han, Bibiana Bielekova, Tomas Gedeon
The immune system has many adaptive and dynamic components that are regulated to ensure appropriate, precise and rapid response to a foreign pathogen. A delayed or inadequate immune response can lead to prolonged disease, while an excessive or under-regulated response can lead to autoimmunity. The cytokine, interleukin-2 (IL-2) and its receptor IL-2R play an important role in maintaining this balance.The IL-2 receptor transduces pSTAT5 signal through both the intermediate and high affinity receptors, which differ from each other by the presence of CD25 chain in IL-2 receptor...
February 20, 2017: Mathematical Medicine and Biology: a Journal of the IMA
https://www.readbyqxmd.com/read/28335444/hiv-education-and-welfare-services-in-primary-care-an-empirical-model-of-integration-in-brazil-s-unified-health-system
#6
Rahbel Rahman, Rogério M Pinto, Melanie M Wall
Integration of health education and welfare services in primary care systems is a key strategy to solve the multiple determinants of chronic diseases, such as Human Immunodeficiency Virus Infection and Acquired Immune Deficiency Syndrome (HIV/AIDS). However, there is a scarcity of conceptual models from which to build integration strategies. We provide a model based on cross-sectional data from 168 Community Health Agents, 62 nurses, and 32 physicians in two municipalities in Brazil's Unified Health System (UHS)...
March 14, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28334641/humanized-mouse-model-for-assessing-the-human-immune-response-to-xenogeneic-and-allogeneic-decellularized-biomaterials
#7
Raymond M Wang, Todd D Johnson, Jingjin He, Zhili Rong, Michelle Wong, Vishal Nigam, Atta Behfar, Yang Xu, Karen L Christman
Current assessment of biomaterial biocompatibility is typically implemented in wild type rodent models. Unfortunately, different characteristics of the immune systems in rodents versus humans limit the capability of these models to mimic the human immune response to naturally derived biomaterials. Here we investigated the utility of humanized mice as an improved model for testing naturally derived biomaterials. Two injectable hydrogels derived from decellularized porcine or human cadaveric myocardium were compared...
March 11, 2017: Biomaterials
https://www.readbyqxmd.com/read/28333959/fnc-efficiently-inhibits-mantle-cell-lymphoma-growth
#8
Yan Zhang, Rong Zhang, Xixi Ding, Bangan Peng, Ning Wang, Fang Ma, Youmei Peng, Qingduan Wang, Junbiao Chang
FNC, 2'-deoxy-2'-β-fluoro-4'-azidocytidine, is a novel cytidine analogue, that has shown strong antiproliferative activity in human lymphoma, lung adenocarcinoma and acute myeloid leukemia. In this study, we investigated the effects of FNC on mantle cell lymphoma (MCL) and the underlying mechanisms. In in vitro experiments, cell viability was detected by the CCK8 assay, and cell cycle progression and apoptosis were assessed by flow cytometry, and the expression of relative apoptosis proteins were detected by Western Blot...
2017: PloS One
https://www.readbyqxmd.com/read/28333145/the-cryo-thermal-therapy-eradicated-melanoma-in-mice-by-eliciting-cd4-t-cell-mediated-antitumor-memory-immune-response
#9
Kun He, Ping Liu, Lisa X Xu
Tumor metastasis is a major concern in tumor therapy. In our previous studies, a novel tumor therapeutic modality of the cryo-thermal therapy has been presented, highlighting its effect on the suppression of distal metastasis and leading to long-term survival in 4T1 murine mammary carcinoma model. To demonstrate the therapeutic efficacy in other aggressive tumor models and further investigate the mechanism of long-term survival induced, in this study, spontaneous metastatic murine B16F10 melanoma model was used...
March 23, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28333124/bap31-is-involved-in-t-cell-activation-through-tcr-signal-pathways
#10
Kunwei Niu, Jialin Xu, Yuhua Cao, Yue Hou, Mu Shan, Yanqing Wang, Yang Xu, Mingyi Sun, Bing Wang
BAP31 is a ubiquitously expressed endoplasmic reticulum (ER) membrane protein. The functions of BAP31 in the immune system have not been investigated due to the lack of animal models. Therefore we created a BAP31 conditional knockdown mouse by performing a knockdown of BAP31 in the thymus. In doing so, we demonstrate that the maturation of T cells is normal but the number of T cells is less in the thymus of the knockout mouse. In addition, the spleen and lymph nodes of peripheral immune organs contained a lesser proportion of the mature T cells in the thymus specific BAP31 knockout mice...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28332231/development-of-humanized-mice-in-the-age-of-genome-editing
#11
Vishnu Hosur, Benjamin E Low, Cindy Avery, Leonard D Shultz, Michael V Wiles
Mice are the most commonly used model organisms to study human disease. Many genetic human diseases can be recapitulated by modifying the mouse genome, which permits testing of existing and novel therapeutics, including combinatorial therapeutics, without putting humans at risk. Specifically, the development of "humanized" mice, i.e., severely immunodeficient mice engrafted with functional human hematopoietic and immune cells and tissues, has revolutionized our ability to study and model human diseases in preclinical in vivo systems...
March 22, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28331857/thrombosis-neuroinflammation-and-poststroke-infection-the-multifaceted-role-of-neutrophils-in-stroke
#12
REVIEW
Johanna Ruhnau, Juliane Schulze, Alexander Dressel, Antje Vogelgesang
Immune cells can significantly predict and affect the clinical outcome of stroke. In particular, the neutrophil-to-lymphocyte ratio was shown to predict hemorrhagic transformation and the clinical outcome of stroke; however, the immunological mechanisms underlying these effects are poorly understood. Neutrophils are the first cells to invade injured tissue following focal brain ischemia. In these conditions, their proinflammatory properties enhance tissue damage and may promote ischemic incidences by inducing thrombus formation...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28331843/curative-effect-of-hf10-on-liver-and-peritoneal-metastasis-mediated-by-host-antitumor-immunity
#13
Yoshihiro Hotta, Hideki Kasuya, Itzel Bustos, Yoshinori Naoe, Toru Ichinose, Maki Tanaka, Yasuhiro Kodera
BACKGROUND: HF10 is a highly attenuated type 1 herpes simplex virus (HSV) with proven effective oncolytic effect. Previous investigations have demonstrated that colon cancer mice model treated with HF10 not only had better survival but were also resistant to the reimplantation of the antitumor effect mediated by host antitumor immunity. Importantly, it has also been noted that in mice with antitumors implanted on both sides of the back, an injection of HF10 on only one side strongly restrains not only the injected antitumor but also the non-injected ones...
2017: Oncolytic Virotherapy
https://www.readbyqxmd.com/read/28331360/clear-differences-in-cerebrospinal-fluid-proteome-between-women-with-chronic-widespread-pain-and-healthy-women-a-multivariate-explorative-cross-sectional-study
#14
Patrik Olausson, Bijar Ghafouri, Emmanuel Bäckryd, Björn Gerdle
INTRODUCTION: Frequent chronic local pain can develop into chronic widespread pain (CWP). The spread of pain is correlated with pain intensity, anxiety, and depression, conditions that ultimately lead to a poor quality of life. Knowledge is incomplete about CWP's etiology, although it has been suggested that both central hyperexcitability and/or a combination with peripheral factors may be involved. Cerebrospinal fluid (CSF) could act as a mirror for the central nervous system as proteins are signal substances that activate the formation of algesics and control nociceptive processes...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28331303/soluble-common-gamma-chain-exacerbates-copd-progress-through-the-regulation-of-inflammatory-t-cell-response-in-mice
#15
Byunghyuk Lee, Eunhee Ko, Jiyeon Lee, Yuna Jo, Hyunju Hwang, Tae Sik Goh, Myungsoo Joo, Changwan Hong
Cigarette smoking (CS) is a major cause of considerable morbidity and mortality by inducing lung cancer and COPD. COPD, a smoking-related disorder, is closely related to the alteration of immune system and inflammatory processes that are specifically mediated by T cells. Soluble common gamma chain (sγc) has recently been identified as a critical regulator of the development and differentiation of T cells. We examined the effects of sγc in a cigarette smoke extract (CSE) mouse model. The sγc level in CSE mice serum is significantly downregulated, and the cellularity of lymph node (LN) is systemically reduced in the CSE group...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28331093/structural-characterization-of-hcov-nl63-n-protein
#16
Bozena Szelazek, Wojciech Kabala, Krzysztof Kus, Michal Zdzalik, Aleksandra Twarda-Clapa, Przemyslaw Golik, Michal Burmistrz, Dominik Florek, Benedykt Wladyka, Krzysztof Pyrc, Grzegorz Dubin
Coronaviruses are responsible for upper and lower respiratory tract infections in humans. It is estimated that 1-10% of the population suffers annually from cold-like symptoms related to infection with HCoV-NL63, an alphacoronavirus. The nucleocapsid (N) protein, the major structural component of the capsid, facilitates RNA packing, links the capsid to the envelope and is also involved in multiple other processes including viral replication and evasion of the immune system. Although the role of N protein in viral replication is relatively well described, no structural data are currently available regarding the N proteins of alphacoronaviruses...
March 22, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28330785/the-interplay-between-angiotensin-ii-tlr4-and-hypertension
#17
REVIEW
Vinicia Campana Biancardi, Gisele Facholi Bomfim, Wagner Luis Reis, Sarah Al-Gassimi, Kenia Pedrosa Nunes
Hypertension is a multifactorial disease. Although a number of different underlying mechanisms have been learned from the various experimental models of the disease, hypertension still poses challenges for treatment. Angiotensin II plays an unquestionable role in blood pressure regulation acting through central and peripheral mechanisms. During hypertension, dysregulation of the Renin-Angiotensin System is associated with increased expression of pro-inflammatory cytokines and reactive oxygen species causing kidney damage, endothelial dysfunction, and increase in sympathetic activity, among other damages, eventually leading to decline in organ function...
March 19, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/28329667/serious-infections-are-on-the-rise-in-us-inpatients-with-psoriasis
#18
Derek Y Hsu
Psoriasis is a chronic inflammatory skin disorder associated with immune dysregulation and use of systemic immunosuppressive treatments that may predispose toward serious infections. We sought to determine the rates of serious infections in hospitalized patients with psoriasis. We analyzed data from the 2002-2012 Nationwide Inpatient Sample, containing a 20% sample of all US hospitalizations. Psoriasis was determined by a validated algorithm using ICD-9-CM codes. In multivariate logistic regression models adjusting for socio-demographics, psoriasis was associated with multiple serious infections, including methicillin-resistant Staphylococcus aureus (odds ratio [95% confidence intervals] 1...
September 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28328162/predictive-model-for-inflammation-grades-of-chronic-hepatitis-b-large-scale-analysis-of-clinical-parameters-and-gene-expressions
#19
Weichen Zhou, Yanyun Ma, Jun Zhang, Jingyi Hu, Menghan Zhang, Yi Wang, Yi Li, Lijun Wu, Yida Pan, Yitong Zhang, Xiaonan Zhang, Xinxin Zhang, Zhanqing Zhang, Jiming Zhang, Hai Li, Lungen Lu, Li Jin, Jiucun Wang, Zhenghong Yuan, Jie Liu
BACKGROUND: Liver biopsy is the gold standard to assess pathological features (e.g. inflammation grades) for hepatitis B virus infected patients, although it's invasive and traumatic; meanwhile, several gene profiles of chronic hepatitis B (CHB) have been separately described in relatively small HBV-infected samples. We aimed to analyze correlations among inflammation grades, gene expressions and clinical parameters (serum alanine amino transaminase, aspartate amino transaminase, and HBV-DNA) in large-scale CHB samples, and to predict inflammation grades by using clinical parameters and/or gene expressions...
March 22, 2017: Liver International: Official Journal of the International Association for the Study of the Liver
https://www.readbyqxmd.com/read/28327183/modeling-multi-mutation-and-drug-resistance-analysis-of-some-case-studies
#20
Mitra Shojania Feizabadi
BACKGROUND: Drug-induced resistance is one the major obstacles that may lead to therapeutic failure during cancer treatment. Different genetic alterations occur when tumor cells divide. Among new generations of tumor cells, some may express intrinsic resistance to a specific chemotherapeutic agent. Also, some tumor cells may carry a gene that can develop resistance induced by the therapeutic drug. The methods by which the therapeutic approaches need to be revised in the occurrence of drug induced resistance is still being explored...
March 21, 2017: Theoretical Biology & Medical Modelling
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