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Interferon gamma

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https://www.readbyqxmd.com/read/28325761/the-aryl-hydrocarbon-receptor-governs-epithelial-cell-invasion-during-oropharyngeal-candidiasis
#1
Norma V Solis, Marc Swidergall, Vincent M Bruno, Sarah L Gaffen, Scott G Filler
Oropharyngeal candidiasis (OPC), caused predominantly by Candida albicans, is a prevalent infection in patients with advanced AIDS, defects in Th17 immunity, and head and neck cancer. A characteristic feature of OPC is fungal invasion of the oral epithelial cells. One mechanism by which C. albicans hyphae can invade oral epithelial cells is by expressing the Als3 and Ssa1 invasins that interact with the epidermal growth factor receptor (EGFR) on epithelial cells and stimulate endocytosis of the organism. However, the signaling pathways that function downstream of EGFR and mediate C...
March 21, 2017: MBio
https://www.readbyqxmd.com/read/28323055/a-6-alkylsalicylate-histone-acetyltransferase-inhibitor-inhibits-histone-acetylation-and-pro-inflammatory-gene-expression-in-murine-precision-cut-lung-slices
#2
Thea van den Bosch, Niek G J Leus, Hannah Wapenaar, Alexander Boichenko, Jos Hermans, Rainer Bischoff, Hidde J Haisma, Frank J Dekker
Lysine acetylations are post-translational modifications of cellular proteins, that are crucial in the regulation of many cellular processes. Lysine acetylations on histone proteins are part of the epigenetic code regulating gene transcription and are installed by histone acetyltransferases. Observations that inflammatory lung diseases, such as asthma and chronic obstructive pulmonary disease, are characterized by increased histone acetyltransferase activity indicate that development of small molecule inhibitors for these enzymes might be a valuable approach towards new therapies for these diseases...
March 16, 2017: Pulmonary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28320483/human-and-feline-adipose-derived-mesenchymal-stem-cells-have-comparable-phenotype-immunomodulatory-functions-and-transcriptome
#3
Kaitlin C Clark, Fernando A Fierro, Emily Mills Ko, Naomi J Walker, Boaz Arzi, Clifford G Tepper, Heather Dahlenburg, Andrew Cicchetto, Amir Kol, Lyndsey Marsh, William J Murphy, Nasim Fazel, Dori L Borjesson
BACKGROUND: Adipose-derived mesenchymal stem cells (ASCs) are a promising cell therapy to treat inflammatory and immune-mediated diseases. Development of appropriate pre-clinical animal models is critical to determine safety and attain early efficacy data for the most promising therapeutic candidates. Naturally occurring diseases in cats already serve as valuable models to inform human clinical trials in oncologic, cardiovascular, and genetic diseases. The objective of this study was to complete a comprehensive side-by-side comparison of human and feline ASCs, with an emphasis on their immunomodulatory capacity and transcriptome...
March 20, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28317801/utility-of-quantiferon-tuberculosis-gold-in-tube-test-for-detecting-latent-tuberculosis-infection-among-close-household-contacts-of-confirmed-tuberculosis-patients-in-accra-ghana
#4
Gloria Ivy Mensah, Sandra Akoley Sowah, Nana Yaw Asare Yeboah, Kennedy Kwasi Addo, Dolly Jackson-Sillah
OBJECTIVE/BACKGROUND: Introduction of the interferon gamma (IFN-γ) release assays with their higher sensitivity and specificity over the traditional tuberculin skin test has improved testing for latent tuberculosis infection (LTBI). None of the IFN-γ release assays has ever been used to screen for LTBI in Ghana. This study set out to determine the utility of the QuantiFERON TB Gold-in-Tube (QFT-GIT) test for the diagnosis of LTBI among close household contacts of newly diagnosed sputum smear-positive tuberculosis (TB) patents in Accra, Ghana, and the associated risk factors for a positive QFT-GIT test...
January 2017: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28317629/mycobacterium-kansasii-infection-in-a-patient-receiving-biologic-therapy-not-all-reactive-interferon-gamma-release-assays-are-tuberculosis
#5
Nasir Saleem, Raya Saba, Srikanth Maddika, Mitchell Weinstein
Mycobacterium kansasii, a nontuberculous mycobacterium, can lead to lung disease similar to tuberculosis. Immunotherapeutic biologic agents predispose to infections with mycobacteria, including M kansasii. T-cell-mediated interferon gamma release assays like QuantiFERON-TB Gold Test (QFT) are widely used by clinicians for the diagnosis of infections with Mycobacterium tuberculosis; however, QFT may also show positive result with certain nontuberculous mycobacterial infections. We report a case of M kansasii pulmonary infection, with a positive QFT, in an immunocompromised patient receiving prednisone, leflunomide and tocilizumab, a humanized anti-interleukin-6 receptor monoclonal antibody...
April 2017: American Journal of the Medical Sciences
https://www.readbyqxmd.com/read/28316991/interferon-gamma-release-assay-performance-of-cerebrospinal-fluid-and-peripheral-blood-in-tuberculous-meningitis-in-china
#6
Liping Pan, Fei Liu, Jinli Zhang, Xinting Yang, Shiqi Zheng, Jing Li, Hongyan Jia, Xiaoyou Chen, Mengqiu Gao, Zongde Zhang
The aim of this study was to examine the performance of T-SPOT.TB on cerebrospinal fluid (CSF) and peripheral blood (PB) in diagnosis of tuberculous meningitis (TBM) in China. Of 100 patients with presumed TBM prospectively enrolled from Sep 2012 to Oct 2014, 53 were TBM (21 definite and 32 probable TBM cases) and 37 were non-TBM cases; the other 10 patients were excluded from analysis due to inconclusive diagnosis, no sufficient CSF samples, or incomplete follow-up. T-SPOT.TB on CSF and PB and routine laboratory tests of CSF were performed simultaneously...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28316015/expression-and-characterization-of-codon-optimized-crimean-congo-hemorrhagic-fever-virus-gn-glycoprotein-in-insect-cells
#7
Mehdi Rahpeyma, Alireza Samarbaf-Zadeh, Manoochehr Makvandi, Ata A Ghadiri, Stuart D Dowall, Fatemeh Fotouhi
Crimean-Congo hemorrhagic fever virus (CCHFV) is a major cause of tick-borne viral hemorrhagic disease in the world. Despite of its importance as a deadly pathogen, there is currently no licensed vaccine against CCHF disease. The attachment glycoprotein of CCHFV (Gn) is a potentially important target for protective antiviral immune responses. To characterize the expression of recombinant CCHFV Gn in an insect-cell-based system, we developed a gene expression system expressing the full-length coding sequence under a polyhedron promoter in Sf9 cells using recombinant baculovirus...
March 18, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28302234/tuberculous-dactylitis-with-concomitant-thyroid-involvement-a-rare-presentation-of-childhood-tuberculosis
#8
Sobia Qamar, Farrah Naz, Samia Naz, Iftikhar Ejaz
Extrapulmonary tuberculosis rarely presents as thyroid involvement along with other manifestations, and poses a diagnostic challenge on account of paucibacillary nature of disease. In general, the diagnosis of tuberculosis is based on epidemiological risk factors, clinical features, imaging studies, in addition to a positive skin testing or Interferon Gamma Release Assay (IGRA). A 14-year boy presented with history of fever and weight loss for one year. On examination, he had painful swelling of fingers and toes along with a painless thyroid nodule and squint...
March 2017: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/28300901/interferon-gamma-induced-local-leukocytoclastic-vasculitis-at-the-subcutaneous-injection-site
#9
Fang Wang, Juan-Hua Liu, Yu-Kun Zhao, Di-Qing Luo
Cutaneous reactions associated with interferons (IFNs) treatment are either localized or generalized. The most common presentation of localized reactions at IFNs injection site is usually an erythematous patch or plaque. Local leukocytoclastic vasculitis presenting with cutaneous necrosis is extremely rare. We report a 19-year-old man with hepatitis B who had local leukocytoclastic vasculitis induced by interferon-gama injection at the injection site. After changing the injection sites and using the combined treatment of prednisone and colchicine, the previous lesion healed and no other cutaneous lesion occurred...
September 2016: Anais Brasileiros de Dermatologia
https://www.readbyqxmd.com/read/28300197/significant-decline-in-anticancer-immune-capacity-during-puberty-in-the-tasmanian-devil
#10
Yuanyuan Cheng, Kim Heasman, Sarah Peck, Emma Peel, Rebecca M Gooley, Anthony T Papenfuss, Carolyn J Hogg, Katherine Belov
Tasmanian devils (Sarcophilus harrisii) are at risk of extinction in the wild due to Devil Facial Tumour Disease (DFTD), a rare contagious cancer. The prevalence of DFTD differs by age class: higher disease prevalence is seen in adults (2-3 years) versus younger devils (<2 years). Here we propose that immunological changes during puberty may play a role in susceptibility to DFTD. We show that the second year of life is a key developmental period for Tasmanian devils, during which they undergo puberty and pronounced changes in the immune system...
March 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28300196/recombinant-mycobacterium-smegmatis-with-a-pmyong2-vector-expressing-human-immunodeficiency-virus-type-i-gag-can-induce-enhanced-virus-specific-immune-responses
#11
Byoung-Jun Kim, Jeong-Ryeol Gong, Ga-Na Kim, Bo-Ram Kim, So-Young Lee, Yoon-Hoh Kook, Bum-Joon Kim
Recently, we have developed a novel Mycobacterium-Escherichia coli shuttle vector system using pMyong2, which can provide an enhanced expression of heterologous genes in recombinant Mycobacterium smegmatis (rSmeg). To investigate the usefulness of rSmeg using pMyong2 in vaccine application, we vaccinated M. smegmatis with pMyong2 system expressing Human Immunodeficiency Virus Type I (HIV-1) Gag p24 antigen (rSmeg-pMyong2-p24) into mice and examined its cellular and humoral immune responses against HIV gag protein...
March 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28299004/contribution-of-dual-fluorescein-and-indocyanine-green-angiography-to-the-appraisal-of-presumed-tuberculous-chorioretinitis-in-a-non-endemic-area
#12
Raphael Massy, Carl P Herbort
PURPOSE: To assess the respective involvement of retina versus choroid in presumed ocular tuberculosis (POT) in a non-endemic area using dual fluorescein (FA) and indocyanine green angiography (ICGA). METHODS: We retrospectively analyzed cases diagnosed with POT at the Centre for Ophthalmic Specialized Care, Lausanne, Switzerland. Angiography signs were quantified using an established dual FA and ICGA scoring system for uveitis. RESULTS: Out of 1739 uveitis patients visited from 1995 to 2014, 53 (3%) were diagnosed with POT; of whom 28 patients (54 eyes) had sufficient data available to be included in this study...
January 2017: Journal of Ophthalmic & Vision Research
https://www.readbyqxmd.com/read/28298295/t-cell-mineralocorticoid-receptor-controls-blood-pressure-by-regulating-interferon-gamma
#13
Xue Nan Sun, Chao Li, Yuan Liu, Lin-Juan Du, Meng-Ru Zeng, Xiao Jun Zheng, Wu Chang Zhang, Yan Liu, Mingjiang Zhu, Deping Kong, Li Zhou, Limin Lu, Zhu-Xia Shen, Yi Yi, Lili Du, Mu Qin, Xu Liu, Zichun Hua, Shuyang Sun, Huiyong Yin, Bin Zhou, Ying Yu, Zhiyuan Zhang, Sheng-Zhong Duan
Rationale: Hypertension remains to be a global public health burden and demands novel intervention strategies such as targeting T cells and T cell-derived cytokines. Mineralocorticoid receptor (MR) antagonists have been clinically used to treat hypertension. However, the function of T cell MR in blood pressure (BP) regulation has not been elucidated. Objective: We aim to determine the role of T cell MR in BP regulation and to explore the mechanism. Methods and Results: Using T cell MR knockout (TMRKO) mouse in combination with angiotensin II (AngII)-induced hypertensive mouse model, we demonstrated that MR deficiency in T cells strikingly decreased both systolic and diastolic BP, and attenuated renal and vascular damage...
March 15, 2017: Circulation Research
https://www.readbyqxmd.com/read/28298070/pulmonary-injury-associated-with-radiation-therapy-assessment-complications-and-therapeutic-targets
#14
REVIEW
Rasmi Rajan Radha, Guruvayoorappan Chandrasekharan
Pulmonary injury is more common in patients undergoing radiation therapy for lungs and other thoracic malignancies. Recently with the use of most-advanced technologies powerful doses of radiation can be delivered directly to tumor site with exquisite precision. The awareness of technical and clinical parameters that influence the chance of radiation induced lung injury is important to guide patient selection and toxicity minimization strategies. At the cellular level, radiation activates free radical production, leading to DNA damage, apoptosis, cell cycle changes, and reduced cell survival...
March 11, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28294085/serum-cytokine-profile-of-laryngeal-squamous-cell-carcinoma-patients
#15
J Sotirović, A Perić, D Vojvodić, N Baletić, I Zaletel, I Stanojević, M Erdoglija, M Milojević
OBJECTIVES: This study aimed to evaluate serum cytokine concentrations in healthy individuals and laryngeal squamous cell carcinoma patients. METHODS: A total of 59 laryngeal squamous cell carcinoma patients and 44 healthy controls were included. Multiplex analysis of interleukins 2, 4, 5, 6, 10, 12, 13 and 17 and interferon-gamma with respect to the presence of laryngeal carcinoma, tumour-node-metastasis T stage, nodal involvement and larynx subsite was performed...
March 15, 2017: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/28290822/-immunological-analysis-of-human-atherosclerotic-plaques-in-ex-vivo-culture-system
#16
D A Vorobyova, A M Lebedev, M S Vagida, O I Ivanova, E I Felker, V N Gontarenko, A V Shpektor, L B Margolis, E Yu Vasilieva
THE AIM OF THE STUDY: to analyze the dynamics of lymphocytic composition of human atherosclerotic plaques in ex vivo culture system. MATERIALS AND METHODS: The study included 15 atherosclerotic plaques obtained from patients who underwent carotid endarterectomy. Plaques were cultured as ring-shaped explants on collagen rafts in culture medium of special composition in CO2 incubator according to the previously developed technique. On day 0, and also on the 4th and 19th days of culture we extracted cells from plaque explants and analyzed B- and T-lymphocytic content of the tissue, as well as the percentage of CD16+ natural killer (NK) cells, using multichromatic flow cytometry...
December 2016: Kardiologiia
https://www.readbyqxmd.com/read/28287491/natural-killer-cell-assessment-in-peripheral-circulation-and-bronchoalveolar-lavage-fluid-of-patients-with-severe-sepsis-a-case-control-study
#17
Paulo Souza-Fonseca-Guimaraes, Fernando Guimaraes, Caroline Natânia De Souza-Araujo, Lidiane Maria Boldrini Leite, Alexandra Cristina Senegaglia, Anita Nishiyama, Fernando Souza-Fonseca-Guimaraes
Sepsis is a complex systemic inflammatory syndrome, the most common cause of which is attributed to systemic underlying bacterial infection. The complete mechanisms of the dynamic pro- and anti-inflammatory processes underlying the pathophysiology of sepsis remain poorly understood. Natural killer (NK) cells play a crucial role in the pathophysiology of sepsis, leading to exaggerated inflammation due their rapid response and production of pro-inflammatory cytokines such as interferon gamma (IFN-γ). Several studies have already shown that NK cells undergo lymphopenia in the peripheral blood of patients with sepsis...
March 12, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28285348/n-adamantyl-4-methylthiazol-2-amine-attenuates-glutamate-induced-oxidative-stress-and-inflammation-in-the-brain
#18
Seung-Ju Yang, Eun-A Kim, Min-Jun Chang, Jiae Kim, Jung-Min Na, Soo Young Choi, Sung-Woo Cho
In this study, we explored the possible mechanisms underlying the neuroprotective and anti-oxidative effects of N-adamantyl-4-methylthiazol-2-amine (KHG26693) against in vivo glutamate-induced toxicity in the rat cerebral cortex. Our results showed that pretreatment with KHG26693 significantly attenuated glutamate-induced elevation of lipid peroxidation, tumor necrosis factor-α, interferon gamma, IFN-γ, interleukin-1β, nitric oxide, reactive oxygen species, NADPH oxidase, caspase-3, calpain activity, and Bax...
March 11, 2017: Neurotoxicity Research
https://www.readbyqxmd.com/read/28285335/cell-type-dependent-regulation-of-free-isg15-levels-and-isgylation
#19
Angeles C Tecalco Cruz, Karen Mejía-Barreto
Interferon-stimulated gene 15 (ISG15) is an ubiquitin-like protein, which can either be found as a free protein or covalently-bound to target proteins via ISGylation. The functions of free and conjugated ISG15 are ambiguous in tumorigenesis owing to its roles as an oncogene and a tumour suppressor gene. This dual role for ISG15 could be a result of the cancer cell type and the cellular context. Here, we report that ISG15 expression is upregulated in different cancer cells compared to normal cells. Furthermore, we found higher endogenous, free ISG15 protein levels in MCF7 breast cancer cells than in other cells, suggesting that non-conjugated ISG15 levels are cell type-specific...
March 11, 2017: Journal of Cell Communication and Signaling
https://www.readbyqxmd.com/read/28284258/mycobacterium-tuberculosis-infection-among-persons-who-inject-drugs-in-san-diego-california
#20
R F Armenta, K M Collins, S A Strathdee, M A Bulterys, F Munoz, J Cuevas-Mota, P Chiles, R S Garfein
BACKGROUND: Persons who inject drugs (PWID) might be at increased risk for Mycobacterium tuberculosis infection and reactivation of latent tuberculous infection (LTBI) due to their injection drug use. OBJECTIVES: To determine prevalence and correlates of M. tuberculosis infection among PWID in San Diego, California, USA. METHODS: PWID aged 18 years underwent standardized interviews and serologic testing using an interferon-gamma release assay (IGRA) for LTBI and rapid point-of-care assays for human immunodeficiency virus (HIV) and hepatitis C virus (HCV) infections...
April 1, 2017: International Journal of Tuberculosis and Lung Disease
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