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immunosuppression and infection

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https://www.readbyqxmd.com/read/28635957/itk-signalling-via-the-ras-irf4-pathway-regulates-the-development-and-function-of-tr1-cells
#1
Weishan Huang, Sabrina Solouki, Nicholas Koylass, Song-Guo Zheng, Avery August
Type 1 regulatory T (Tr1) cells differentiate in response to signals engaging the T cell receptor (TCR), express high levels of the immunosuppressive cytokine IL-10, but not Foxp3, and can suppress inflammation and promote immune tolerance. Here we show that ITK, an important modulator of TCR signalling, is required for the TCR-induced development of Tr1 cells in various organs, and in the mucosal system during parasitic and viral infections. ITK kinase activity is required for mouse and human Tr1 cell differentiation...
June 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/28634525/pseudomembranous-aspergillar-tracheobronchitis-in-a-non-neutropenic-critically-ill-patient-in-the-intensive-care-unit
#2
Sameen Khalid, Fnu Asad-Ur -Rahman, Aamer Abbass, Sigfredo Aldarondo, Khalid Abusaada
Invasive aspergillosis is an important cause of morbidity and mortality among immunocompromised patients. Prolonged neutropenia is the most common risk factor. It has rarely been reported to occur in non-neutropenic critically ill patients in the intensive care unit setting. Mortality rate in this group has been reported to be as high as 92%. We report a case of tracheobronchial aspergillosis in a non-neutropenic critically ill patient to highlight the fact that critically ill patients admitted in the intensive care unit can develop opportunistic infections such as invasive aspergillosis even in the absence of classic risk factors and prior history of immunosuppression...
January 2017: Journal of Community Hospital Internal Medicine Perspectives
https://www.readbyqxmd.com/read/28634471/a-chitin-binding-protein-purified-from-moringa-oleifera-seeds-presents-anticandidal-activity-by-increasing-cell-membrane-permeability-and-reactive-oxygen-species-production
#3
João X S Neto, Mirella L Pereira, Jose T A Oliveira, Lady C B Rocha-Bezerra, Tiago D P Lopes, Helen P S Costa, Daniele O B Sousa, Bruno A M Rocha, Thalles B Grangeiro, José E C Freire, Ana Cristina O Monteiro-Moreira, Marina D P Lobo, Raimunda S N Brilhante, Ilka M Vasconcelos
Candida species are opportunistic pathogens that infect immunocompromised and/or immunosuppressed patients, particularly in hospital facilities, that besides representing a significant threat to health increase the risk of mortality. Apart from echinocandins and triazoles, which are well tolerated, most of the antifungal drugs used for candidiasis treatment can cause side effects and lead to the development of resistant strains. A promising alternative to the conventional treatments is the use of plant proteins...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28634161/oncolytic-adenovirus-expressing-bispecific-antibody-targets-t-cell-cytotoxicity-in-cancer-biopsies
#4
Joshua D Freedman, Joachim Hagel, Eleanor M Scott, Ioannis Psallidas, Avinash Gupta, Laura Spiers, Paul Miller, Nikolaos Kanellakis, Rebecca Ashfield, Kerry D Fisher, Margaret R Duffy, Leonard W Seymour
Oncolytic viruses exploit the cancer cell phenotype to complete their lytic life cycle, releasing progeny virus to infect nearby cells and repeat the process. We modified the oncolytic group B adenovirus EnAdenotucirev (EnAd) to express a bispecific single-chain antibody, secreted from infected tumour cells into the microenvironment. This bispecific T-cell engager (BiTE) binds to EpCAM on target cells and cross-links them to CD3 on T cells, leading to clustering and activation of both CD4 and CD8 T cells. BiTE transcription can be controlled by the virus major late promoter, limiting expression to cancer cells that are permissive for virus replication...
June 20, 2017: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/28633955/the-microbiome-and-transfusion-in-cancer-patients
#5
REVIEW
Hadi Goubran, Jerard Seghatchian, Julia Radosevic, Gaafar Ragab, Thierry Burnouf
Our microbiota is determined by many variables including ABO blood groups. The microbiota is not only confined to the gut and skin but is also recoverable from blood of healthy donors. The microbiota shape our immune system through cross reactivity with antigens, the expression of direct molecular patterns, the release of cytokines, the effects on nutrients and micronutrients and even through an interplay with epigenetics. It is likely, therefore, that a donor's microbiota could alter the antigenicity of blood and its components and potentially contribute to transfusion-related immune modulation [TRIM]...
June 3, 2017: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/28633752/rituximab-administration-in-a-patient-with-pemphigus-vulgaris-following-reactivation-of-occult-hepatitis-b-virus-infection
#6
Soheil Tavakolpour, Tahereh Soori, Pedram Noormohammadpour, Kamran Balighi, Hamidreza Mahmoudi, Maryam Daneshpazhooh
Immunosuppressive drugs are the milestone of treatment of autoimmune diseases, but they can lead to serious complications, including hepatitis B virus reactivation in HBV carriers as well as in patients with occult HBV infection (OBI). A 36-year-old man with OBI was diagnosed with pemphigus vulgaris. He was prescribed prednisolone and his hepatitis B surface antigen turned positive. Viral replication was successfully controlled by lamivudine and adefovir. Mycophenolate mofetil and intravenous immunoglobulin  were not effective in controlling the pemphigus vulgaris...
June 20, 2017: Dermatology Online Journal
https://www.readbyqxmd.com/read/28633734/cutaneous-hiv-associated-kaposi-sarcoma-a-potential-setting-for-management-by-clinical-observation
#7
Surget V Beatrous, Stratton B Grisoli, Ryan R Riahi, Philip R Cohen
Kaposi sarcoma (KS) is a malignancy of viral etiology whose course ranges from cutaneous limited lesions to fulminant disease with multi-organ involvement. Four clinical variants of the disease exist: classic, endemic, iatrogenic, and epidemic. Iatrogenic and epidemic variants of Kaposi sarcoma develop in the setting of immune suppression. Transplant recipients who develop iatrogenic KS typically demonstrate improvement of lesions following de-escalation of immunosuppressive therapy. Similarly, HIV-infected patients who begin highly active antiretroviral therapy (HAART) experience immune reconstitution, which can induce KS regression...
June 15, 2017: Dermatology Online Journal
https://www.readbyqxmd.com/read/28632974/hcv-positive-donor-organs-in-solid-organ-transplantation-mind-the-gap
#8
EDITORIAL
J A Fishman, X Forns
The shortage of organs for transplantation is a major impediment to access to life-saving therapy. The availability of antiviral therapies that control hepatitis B (HBV) and HIV, or cure hepatitis C (HCV), have changed traditional equations in transplantation, allowing infected individuals access to transplantation without unimpeded viral replication during immunosuppression. The availability of these therapies also permits use of organs from donors actively or potentially infected with these viruses. This article is protected by copyright...
June 20, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28632753/mait-cells-launch-a-rapid-robust-and-distinct-hyperinflammatory-response-to-bacterial-superantigens-and-quickly-acquire-an-anergic-phenotype-that-impedes-their-cognate-antimicrobial-function-defining-a-novel-mechanism-of-superantigen-induced-immunopathology
#9
Christopher R Shaler, Joshua Choi, Patrick T Rudak, Arash Memarnejadian, Peter A Szabo, Mauro E Tun-Abraham, Jamie Rossjohn, Alexandra J Corbett, James McCluskey, John K McCormick, Olivier Lantz, Roberto Hernandez-Alejandro, S M Mansour Haeryfar
Superantigens (SAgs) are potent exotoxins secreted by Staphylococcus aureus and Streptococcus pyogenes. They target a large fraction of T cell pools to set in motion a "cytokine storm" with severe and sometimes life-threatening consequences typically encountered in toxic shock syndrome (TSS). Given the rapidity with which TSS develops, designing timely and truly targeted therapies for this syndrome requires identification of key mediators of the cytokine storm's initial wave. Equally important, early host responses to SAgs can be accompanied or followed by a state of immunosuppression, which in turn jeopardizes the host's ability to combat and clear infections...
June 2017: PLoS Biology
https://www.readbyqxmd.com/read/28631698/-hepatitis-c-virus-associated-cryoglobulinemic-vasculitis-a-20-year-experience-with-treatment
#10
T M Ignatova, L V Kozlovskaya, N B Gordovskaya, O A Chernova, S Yu Milovanova, P I Novikov, T P Nekrasova, T V Beketova, N A Mukhin
AIM: To summarize the experience of a multidisciplinary therapy hospital in treating patients with hepatitis C virus (HCV)-associated cryoglobulinemic vasculitis (CV). SUBJECTS AND METHODS: Seventy-two patients (mean age, 49.4±10.3 years) with HCV-associated CV were examined and followed up for an average period of 2.8±3.6 years. The efficiency of traditional (corticosteroids ± cyclophosphamide) and selective (rituximab) immunosuppressive therapy (IST) was estimated in 31 and 15 observations, respectively, and that of antiviral therapy (AVT) in 25...
2017: Terapevticheskiĭ Arkhiv
https://www.readbyqxmd.com/read/28631657/citrobacter-freundii-as-a-cause-of-acute-suppurative-thyroiditis-in-an-immunocompetent-adult-female
#11
Gursimran Kaur Mohi, Priya Datta, Jagdish Chander, Arjun Das
Acute suppurative thyroiditis (AST) is an uncommon condition, in the patients with preexisting thyroid disease or immunosuppression. The most common cause of AST is bacterial, and the most common bacteria are Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli, and Klebsiella species. Due to various complications such as septicemia, septic thrombophlebitis, necrotizing mediastinitis, or pericarditis, prompt diagnosis and treatment are the keys to reduce mortality and morbidity. Here, we describe a case of a 40-year-old female with AST caused by Citrobacter freundii...
April 2017: Indian Journal of Pathology & Microbiology
https://www.readbyqxmd.com/read/28631044/-personalized-treatment-of-viral-hepatitis-of-the-present-and-the-future-hepatitis%C3%A2-b-c-delta-and-e
#12
REVIEW
R Bartenschlager, M Cornberg, T Pietschmann
Precision medicine is also possible for infectious diseases as shown for the treatment of chronic viral hepatitis, especially if different options are available. In hepatitis B virus (HBV) infection, treatment indication as well as the choice of treatment and the decisions to stop treatment are based on viral markers and alanine aminotransferase (ALT) level. Future therapies for HBV infection aiming for functional cure or even virus elimination may be even more personalized and have to take into account the immune status of a given patient...
June 19, 2017: Der Internist
https://www.readbyqxmd.com/read/28630845/multi-foci-salmonella-enteritis-osteomyelitis-of-thoracic-spine-with-pleural-effusion-and-fatal-outcome-a-unique-case-presentation-and-review-of-the-literature
#13
Ioannis Papaioannou, Andreas Baikousis, Panagiotis Korovessis
INTRODUCTION: A case of thoracic vertebral osteomyelitis due to Salmonella enteritis (SE) in an immunocompetent patient is reported. This is the third case in the literature of SE thoracic vertebral osteomyelitis, but the first one with this multi-foci presentation and finally fatal outcome due to meningoencephalitis. Further data that makes our case unique are the absence of fever (body temperature: 37.4°C) and gastrointestinal disorders. CASE REPORT: A 57-year-old male patient initially presented with thoracic pain, dyspnea, and knee pain...
January 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28630384/modulation-of-cd4-t-cell-subsets-by-euphorbia-microciadia-and-euphorbia-osyridea-plant-extracts
#14
Haideh Namdari, Maryam Izad, Zahra Amirghofran
BACKGROUND: Euphorbia plants are traditionally used in folk medicine for infections, inflammation, and cancer. OBJECTIVES: To investigate the effects of the butanolic extracts of Euphorbia micorociadia and Euphorbia osyridea on specific transcription factors and cytokines expression of T cell subsets. METHODS: Activated mouse splenocytes were cultured in the presence of non-cytotoxic concentrations of the extracts. Cells were evaluated for the gene expressions of T cell transcription factors and cytokines of T helper (Th)1 [T-bet and interferon gamma (IFNγ)], Th17 [retinoic acid receptor related orphan receptor (RORγt) and interleukin (IL)-17], and T regulatory (Treg) cells [forkhead box P3(Foxp3), IL-10, and Transforming growth factor (TGF)-β] using real-time PCR...
June 2017: Iranian Journal of Immunology: IJI
https://www.readbyqxmd.com/read/28630341/pig-model-mimicking-chronic-hepatitis-e-virus-infection-in-immunocompromised-patients-to-assess-immune-correlates-during-chronicity
#15
Dianjun Cao, Qian M Cao, Sakthivel Subramaniam, Danielle M Yugo, C Lynn Heffron, Adam J Rogers, Scott P Kenney, Debin Tian, Shannon R Matzinger, Christopher Overend, Nicholas Catanzaro, Tanya LeRoith, Heng Wang, Pablo Piñeyro, Nicole Lindstrom, Sherrie Clark-Deener, Lijuan Yuan, Xiang-Jin Meng
Chronic hepatitis E virus (HEV) infection is a significant clinical problem in immunocompromised individuals such as organ transplant recipients, although the mechanism remains unknown because of the lack of an animal model. We successfully developed a pig model of chronic HEV infection and examined immune correlates leading to chronicity. The conditions of immunocompromised patients were mimicked by treating pigs with an immunosuppressive regimen including cyclosporine, azathioprine, and prednisolone. Immunocompromised pigs infected with HEV progressed to chronicity, because 8/10 drug-treated HEV-infected pigs continued fecal virus shedding beyond the acute phase of infection, whereas the majority (7/10) of mock-treated HEV-infected pigs cleared fecal viral shedding at 8 wk postinfection...
June 19, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28629878/campylobacter-bacteremia-in-london-a-44-year-single-center-study
#16
Geraldine A O'Hara, Joseph R A Fitchett, John L Klein
PURPOSE: Campylobacter species are a well-recognized but rare cause of bloodstream infection. METHODS: Here we reviewed 41 cases of Campylobacter bloodstream infection occurring at a single center in London over 44years, comprising 0.2% of all recorded episodes during this time period. RESULTS: Patients had a mean age of 46years and, contrasting with previous reports, nearly 50% of our patients did not have significant comorbidities. Ciprofloxacin resistance increased over the study period with 35% of isolates overall being resistant compared with only 3% exhibiting macrolide resistance...
June 2, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28628613/immunosuppressive-and-angiogenic-cytokine-profile-associated-with-bartonella-bacilliformis-infection-in-post-outbreak-and-endemic-areas-of-carrion-s-disease-in-peru
#17
Maria J Pons, Cláudia Gomes, Ruth Aguilar, Diana Barrios, Miguel Angel Aguilar-Luis, Joaquim Ruiz, Carlota Dobaño, Juana Del Valle-Mendoza, Gemma Moncunill
Analysis of immune responses in Bartonella bacilliformis carriers are needed to understand acquisition of immunity to Carrion's disease and may allow identifying biomarkers associated with bacterial infection and disease phases. Serum samples from 144 healthy subjects from 5 villages in the North of Peru collected in 2014 were analyzed. Four villages had a Carrion's disease outbreak in 2013, and the other is a traditionally endemic area. Thirty cytokines, chemokines and growth factors were determined in sera by fluorescent bead-based quantitative suspension array technology, and analyzed in relation to available data on bacteremia quantified by RT-PCR, and IgM and IgG levels measured by ELISA against B...
June 19, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28628381/monoclonal-immunoglobulin-associated-proliferative-glomerulonephritis-characterized-by-organized-deposits-of-striated-ultra-substructures-a-case-report
#18
Shigeo Hara, Hiroyasu Tsukaguchi, Tastufumi Oka, Makiko Kusabe, Masayuki Mizui, Kensuke Joh
We herein report the case of a 64-year-old male who presented with progressive glomerulonephritis notable for organized and striated ultra-substructures. The patient was diagnosed with hypertension and proteinuria 3 years prior to admission and subsequently developed nephrotic syndrome and impairment of renal function. Laboratory tests did not reveal any evidence of infections or autoimmune diseases. Monoclonal gammopathy was not detected in serum or urine, although a small population of abnormal plasma cell clones was detected by flow cytometry...
June 19, 2017: Ultrastructural Pathology
https://www.readbyqxmd.com/read/28628343/chronic-herpetic-retinitis-clinical-features-and-long-term-outcomes
#19
Soufiane Souissi, Christine Fardeau, Hoang Mai Le, Flore Rozenberg, Bahram Bodaghi, Phuc Le Hoang
INTRODUCTION: Chronic uveitis treated with immunosuppressive agents may have unfavorable outcomes due to delays in diagnosis. The aim of this study was to review initial data from clinical and ocular assessments and patient outcomes following specific treatments for atypical herpes virus ocular infections. METHODS: The records of four consecutive patients with recurrent uveitis for at least five years treated in our department between 2001 and 2016 were retrospectively reviewed...
June 19, 2017: Ocular Immunology and Inflammation
https://www.readbyqxmd.com/read/28628217/mouse-model-of-burn-wound-and-infection-thermal-hot-air-lesion-induced-immunosuppression
#20
Henrik Calum, Niels Høiby, Claus Moser
The immunosuppression induced by thermal injury renders the burned victim susceptible to infection. A mouse model was developed to examine the immunosuppression, which was possible to induce even at a minor thermal insult of 6% total body surface area. After induction of the burn (48 hr) a depression of leukocytes in the peripheral blood was found of the burned mice. This depression was due to a reduction in the polymorphonuclear cells. The burned mice were not able to clear a Pseudomonas aeruginosa wound infection, since the infection spread to the blood as compared to mice only infected with P...
June 19, 2017: Current Protocols in Mouse Biology
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