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https://www.readbyqxmd.com/read/29668141/-prevalence-and-risk-factors-associated-to-tuberculosis-and-non-tuberculous-mycobacterial-infections-in-hiv-positive-patients-in-bogot%C3%A3
#1
Magda Beltrán-León, Francy Pérez-Llanos, Liliana Sánchez, Carlos Parra-López, Myriam Navarrete, Ricardo Sánchez, Carlos Awad, Ana María Granada, Edgardo Quintero, Óscar Briceño, Óscar Cruz, Martha Isabel Murcia
INTRODUCTION: Tuberculosis is one of the most widely distributed infectious diseases worldwide. It is the most common cause of mortality among AIDS patients. In Colombia, 12,918 tuberculosis cases were notified, and 926 deaths were reported in 2015. OBJECTIVE: To determine the prevalence and risk factors associated to mycobacterial infections in HIVpositive patients in two public hospitals from Bogotá. MATERIALS AND METHODS: A prospective and descriptive study was carried out by an active search for tuberculosis cases and non-tuberculous mycobacterial infections in HIV-positive patients...
March 15, 2018: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/29666412/extensive-t-cell-cross-reactivity-between-diverse-seasonal-influenza-strains-in-the-ferret-model
#2
Adrian J Reber, Nedzad Music, Jin Hyang Kim, Shane Gansebom, Jufu Chen, Ian York
Influenza virus causes widespread, yearly epidemics by accumulating surface protein mutations to escape neutralizing antibodies established from prior exposure. In contrast to antibody epitopes, T cell mediated immunity targets influenza epitopes that are more highly conserved and have potential for cross-protection. The extent of T cell cross-reactivity between a diverse array of contemporary and historical influenza strains was investigated in ferrets challenged with 2009 pandemic H1N1 influenza or the seasonal H3N2 strain, A/Perth/16/2009...
April 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29665919/-effect-and-clinical-significance-of-bortezomib-and-thalidomide-on-the-memory-t-cells-subsets-and-regulatory-t-cells-in-peripheral-blood-of-patients-with-multiple-myeloma
#3
Ling-Ling Shi, Han-Qing Li, Jian-Gang Mei, Xiao-Gang Zhou, Feng Li, Ping Song, Yong-Ping Zhai
OBJECTIVE: To investigate the effects of bortezomib(BTZ) and thalidomide(TM) on peripheral blood memory T-cells (Tm ) and regulatory T cells(Tregs) in patients with multiple myeloma(MM). METHODS: Eighty-six MM patients received 2 courses of chemotherapy were divided into effective (partial response at least) group (63 cases) and ineffective (no partial response) group (17 cases) according to therapeutic efficacy; these 80 patients were divided into BTZ group (38 cases) and TM group (42 cases) yet according to therapeutic regimens, 20 newly diagnosed MM patients were used as baseline group, 30 healthy volunteers were used as healthy control group...
April 2018: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/29665817/elevated-il-17-levels-in-semi-immune-anaemic-mice-infected-with-plasmodium-berghei-anka
#4
Gideon Kofi Helegbe, Nguyen Tien Huy, Tetsuo Yanagi, Mohammed Nasir Shuaibu, Mihoko Kikuchi, Mahamoud Sama Cherif, Kenji Hirayama
BACKGROUND: Alterations in inflammatory cytokines and genetic background of the host contribute to the outcome of malaria infection. Despite the promising protective role of IL-17 in infections, little attention is given to further understand its importance in the pathogenesis of severe malaria anaemia in chronic/endemic situations. The objective of this study, therefore, was to evaluate IL-17 levels in anaemic condition and its association with host genetic factors. METHODS: Two mice strains (Balb/c and CBA) were crossed to get the F1 progeny, and were (F1, Balb/c, CBA) taken through 6 cycles of Plasmodium berghei (ANKA strain) infection and chloroquine/pyrimethamine treatment to generate semi-immune status...
April 17, 2018: Malaria Journal
https://www.readbyqxmd.com/read/29665000/increased-killer-b-cells-in-chronic-hcv-infection-may-lead-to-autoimmunity-and-increased-viral-load
#5
Nasren Eiza, Eli Zuckerman, Matthias Carlebach, Tova Rainis, Yair Goldberg, Zahava Vadasz
BACKGROUND: B regulatory (Breg) cells are characterized by various membrane markers, and the secretion of different inhibitory cytokines. A new subset of Breg cells was identified as CD5hi Fas-ligand (FasL)hi. Their main reported role is to suppress anti-viral and anti-tumor immune responses and hence, they have been dubbed "killer" B cells. In this study, we aim to assess the role of these cells in chronic hepatitis C virus (HCV) infection, and determine if they contribute to the increased viral load and persistence of HCV and its related autoimmunity...
April 17, 2018: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/29664837/chronic-alcohol-ingestion-worsens-survival-and-alters-gut-epithelial-apoptosis-and-cd8-t-cell-function-after-pseudomonas-aeruginosa-pneumonia-induced-sepsis
#6
Nathan J Klingensmith, Katherine T Fay, John D Lyons, Ching-Wen Chen, Shunsuke Otani, Zhe Liang, Deena B Chihade, Eileen M Burd, Mandy L Ford, Craig M Coopersmith
Mortality is higher in septic patients with a history of alcohol use disorder than in septic patients without a history of chronic alcohol usage. We have previously described a model of chronic alcohol ingestion followed by sepsis from cecal ligation and puncture in which alcohol-fed septic mice have higher mortality than water-fed septic mice, associated with altered gut integrity and increased production of TNF and IFNγ by splenic CD4 T cells without alterations in CD8 T cell function. The purpose of this study was to determine whether this represents a common host response to the combination of alcohol and sepsis by creating a new model in which mice with chronic alcohol ingestion were subjected to a different model of sepsis...
April 16, 2018: Shock
https://www.readbyqxmd.com/read/29664688/predictive-value-of-cd4-cd8-ratio-in-patients-with-breast-cancer-receiving-recombinant-human-thrombopoietin
#7
Junnan Xu, Lei Jiang, Hui Cao, Yufeng Jia, Shuo Wu, Cui Jiang, Tao Sun
Recombinant human thrombopoietin (rhTPO) is a key determinant of therapy for chemotherapy-induced thrombocytopenia (CIT) in patients with breast cancer. To assess the predictive value of preoperative inflammatory cells for response to rhTPO in breast cancer patients, a total of 198 female patients with breast cancer were enrolled between June 2011 and December 2016 in Liaoning Cancer Hospital. Peripheral blood samples before rhTPO therapy were obtained, the ratios of helper T cell (CD4+ ), cytotoxic T cell (CD8+ ), NK cell (CD16+ /CD56+ ), and B cell (CD19+ ) were analyzed, and CD4/CD8 ratios were calculated...
April 17, 2018: Journal of Interferon & Cytokine Research
https://www.readbyqxmd.com/read/29664568/the-role-of-cytokines-in-t-cell-memory-in-health-and-disease
#8
REVIEW
Miro E Raeber, Yves Zurbuchen, Daniela Impellizzieri, Onur Boyman
Upon stimulation with their cognate antigen, naive T cells undergo proliferation and differentiation into effector cells, followed by apoptosis or survival as precursors of long-lived memory cells. These phases of a T-cell response and the ensuing maintenance of memory T cells are shaped by cytokines, most notably interleukin-2 (IL-2), IL-7, and IL-15 that share the common γ chain (γc ) cytokine receptor. Steady-state production of IL-7 and IL-15 is necessary for background proliferation and homeostatic survival of CD4+ and CD8+ memory T cells...
May 2018: Immunological Reviews
https://www.readbyqxmd.com/read/29663369/specific-blockade-cd73-alters-the-exhausted-phenotype-of-t-cells-in-head-and-neck-squamous-cell-carcinoma
#9
Wei-Wei Deng, Yi-Cun Li, Si-Rui Ma, Liang Mao, Guang-Tao Yu, Lin-Lin Bu, Ashok B Kulkarni, Wen-Feng Zhang, Zhi-Jun Sun
The adenosine-induced immunosuppression hampers the immune response toward tumor cells and facilitates the tumor cells to evade immunosurveillance. CD73, an ecto-5-nucleotidase, is the ectoenzyme dephosphorylating extracellular AMP to adenosine. Here, using immunocompetent transgenic head and neck squamous cell carcinoma (HNSCC) mouse model, immune profiling showed high expression of CD73 on CD4+ and CD8+ T cells was associated with an 'exhausted' phenotype. Further, treatment with anti-CD73 monoclonal antibody (mAb) significantly blunted the tumor growth in the mouse model, and the blockade of CD73 reversed the 'exhausted' phenotype of CD4+ and CD8+ T cells through downregulation of total expression of PD-1 and CTLA-4 on T cells...
April 16, 2018: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29663162/functional-defects-of-treg-cells-new-targets-in-rheumatic-diseases-including-ankylosing-spondylitis
#10
REVIEW
Jinlin Miao, Ping Zhu
PURPOSE OF REVIEW: This study aims to review the advances of Treg cell biology, the functional defects of Treg cells, and the potential strategies for the experimental, preclinical or clinical application of Treg cell therapy in the context of autoimmune/immune-mediated rheumatic diseases. RECENT FINDINGS: CD4+ CD25+ regulatory T (Treg) cells are a phenotypically and functionally heterogeneous subset of lymphocytes that prevent a variety of autoimmune diseases. As in many autoimmune diseases, the functional defects of Treg cells are supposed to play relevant roles in the pathogenesis and development of systemic lupus erythematosus, rheumatoid arthritis, ankylosing spondylitis, and other autoimmune/immune-mediated rheumatic diseases...
April 16, 2018: Current Rheumatology Reports
https://www.readbyqxmd.com/read/29663084/characterization-of-circulating-leukocytes-and-correlation-of-leukocyte-subsets-with-metabolic-parameters-1-and-5-years-after-diabetes-diagnosis
#11
Maria Apostolopoulou, Barbara Menart-Houtermans, Ruth Ruetter, Bettina Nowotny, Ulrich Gehrmann, Daniel Markgraf, Julia Szendroedi, Nanette C Schloot, Michael Roden
AIMS: Infiltration of pancreatic islets with different leukocyte subtypes likely contributes to deterioration of glycemia in diabetes mellitus. Different subsets of leukocytes have been previously associated with type 1 or type 2 diabetes. This study aimed at examining these subsets at different stages of diabetes progression and possible relationships with metabolic parameters. METHODS: A total of 206 patients, 76 with type 1 and 130 with type 2 diabetes, were studied within the first year of diabetes diagnosis...
April 16, 2018: Acta Diabetologica
https://www.readbyqxmd.com/read/29663037/polyfunctionality-of-cd4-t-lymphocytes-is-increased-after-chemoradiotherapy-of-head-and-neck-squamous-cell-carcinoma
#12
J Doescher, S Jeske, S E Weissinger, C Brunner, S Laban, E Bölke, T K Hoffmann, T L Whiteside, P J Schuler
BACKGROUND: For head and neck squamous cell cancer (HNSCC), standard therapy consists of surgery, radiation, and/or chemotherapy. Antineoplastic immunotherapy could be an option in an adjuvant setting and is already in palliation. A functional immune system is a prerequisite for successful immunotherapy. However, effects of the standard-of-care therapy on the patients' immune system are not fully understood. METHODS: Peripheral blood mononuclear cells (PBMC) were collected from patients with HNSCC (n = 37) and healthy controls (n = 10)...
April 16, 2018: Strahlentherapie und Onkologie: Organ der Deutschen Röntgengesellschaft ... [et Al]
https://www.readbyqxmd.com/read/29662494/evolution-of-neutralization-response-in-hiv-1-subtype-c-infected-individuals-exhibiting-broad-cross-clade-neutralization-of-hiv-1-strains
#13
Narayanaiah Cheedarla, Babu Hemalatha, Brahmaiah Anangi, Kannan Muthuramalingam, Murugesan Selvachithiram, Pattabiraman Sathyamurthi, Nandagopal Kailasam, Raghavan Varadarajan, Soumya Swaminathan, Srikanth Prasad Tripathy, S Kalyanaraman Vaniambadi, D Ramanathan Vadakkupattu, Luke Elizabeth Hanna
Strain-specific neutralizing antibodies develop in all human immunodeficiency virus type 1 (HIV-1)-infected individuals. However, only 10-30% of infected individuals produce broadly neutralizing antibodies (bNAbs). Identification and characterization of these bNAbs and understanding their evolution dynamics are critical for obtaining useful clues for the development of an effective HIV vaccine. Very recently, we published a study in which we identified 12 HIV-1 subtype C-infected individuals from India whose plasma showed potent and broad cross-clade neutralization (BCN) ability (1)...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29662488/subretinal-injection-of-hy-peptides-induces-systemic-antigen-specific-inhibition-of-effector-cd4-and-cd8-t-cell-responses
#14
Julie Vendomèle, Safa Dehmani, Quentin Khebizi, Anne Galy, Sylvain Fisson
Purpose: Injection of an antigen into the anterior chamber of the eye induces a peripheral antigen-specific immune modulation mechanism, known as anterior chamber-associated immune deviation (ACAID). Delayed-type hypersensitivity experiments argue that the subretinal space (SR) of the eye displays properties similar to ACAID. However, no investigation was performed regarding the differential impact of a subretinal antigen injection on peripheral CD4+ versus CD8+ T cells, on the potential immune deviation regarding Th profiles, and on the antigen-specificity of the inhibition...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29662482/targeting-mycobacterium-tuberculosis-antigens-to-dendritic-cells-via-the-dc-specific-icam3-grabbing-nonintegrin-receptor-induces-strong-t-helper-1-immune-responses
#15
Lis Noelia Velasquez, Philipp Stüve, Maria Virginia Gentilini, Maxine Swallow, Judith Bartel, Nils Yngve Lycke, Daniel Barkan, Mariana Martina, Hugo D Lujan, Hakan Kalay, Yvette van Kooyk, Tim D Sparwasser, Luciana Berod
Tuberculosis remains a major global health problem and efforts to develop a more effective vaccine have been unsuccessful so far. Targeting antigens (Ags) to dendritic cells (DCs) in vivo has emerged as a new promising vaccine strategy. In this approach, Ags are delivered directly to DCs via antibodies that bind to endocytic cell-surface receptors. Here, we explored DC-specific-ICAM3-grabbing-nonintegrin (DC-SIGN) targeting as a potential vaccine against tuberculosis. For this, we made use of the hSIGN mouse model that expresses human DC-SIGN under the control of the murine CD11c promoter...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29662196/tocopherols-inhibit-esophageal-carcinogenesis-through-attenuating-nf-%C3%AE%C2%BAb-activation-and-cxcr3-mediated-inflammation
#16
Hui Yang, Miao Xu, Fang Lu, Qiannan Zhang, Yongquan Feng, Chung S Yang, Ning Li, Xudong Jia
Esophageal cancer is one of the common causes of cancer mortality in the world. The predominant histological subtype, esophageal squamous cell carcinoma (ESCC), often results in poor prognosis due to the lack of effective approaches for the early diagnosis and treatment, highlighting the need for preventive intervention against this disease. Here we report that dietary tocopherols significantly prevents esophageal carcinogenesis by inhibiting the activation of NF-κB and the subsequent interaction of chemokine CXCL9/10/11 with their receptor CXCR3 in ESCC induced by N-nitrosomethylbenzylamine (NMBA) in murine models...
April 17, 2018: Oncogene
https://www.readbyqxmd.com/read/29662170/c-maf-controls-immune-responses-by-regulating-disease-specific-gene-networks-and-repressing-il-2-in-cd4-t-cells
#17
Leona Gabryšová, Marisol Alvarez-Martinez, Raphaëlle Luisier, Luke S Cox, Jan Sodenkamp, Caroline Hosking, Damián Pérez-Mazliah, Charlotte Whicher, Yashaswini Kannan, Krzysztof Potempa, Xuemei Wu, Leena Bhaw, Hagen Wende, Michael H Sieweke, Greg Elgar, Mark Wilson, James Briscoe, Vicki Metzis, Jean Langhorne, Nicholas M Luscombe, Anne O'Garra
The transcription factor c-Maf induces the anti-inflammatory cytokine IL-10 in CD4+ T cells in vitro. However, the global effects of c-Maf on diverse immune responses in vivo are unknown. Here we found that c-Maf regulated IL-10 production in CD4+ T cells in disease models involving the TH 1 subset of helper T cells (malaria), TH 2 cells (allergy) and TH 17 cells (autoimmunity) in vivo. Although mice with c-Maf deficiency targeted to T cells showed greater pathology in TH 1 and TH 2 responses, TH 17 cell-mediated pathology was reduced in this context, with an accompanying decrease in TH 17 cells and increase in Foxp3+ regulatory T cells...
April 16, 2018: Nature Immunology
https://www.readbyqxmd.com/read/29661928/identification-and-evaluation-of-novel-protective-antigens-for-the-development-of-a-candidate-tb-subunit-vaccine
#18
Elena Stylianou, Rachel Harrington-Kandt, Julia Beglov, Naomi Bull, Nawamin Pinpathomrat, Gwendolyn M Swarbrick, Deborah A Lewinsohn, David M Lewinsohn, Helen McShane
The development of a vaccine against tuberculosis (TB), a disease caused by Mycobacterium tuberculosis ( M.tb ), is urgently needed. The only currently available vaccine, BCG, has variable efficacy. One approach in the global vaccine development effort is focused on boosting BCG using subunit vaccines. The identification of novel antigens for inclusion in subunit vaccines is a critical step in the TB vaccine development pathway. We selected four novel mycobacterial antigens recognised during the course of human infection...
April 16, 2018: Infection and Immunity
https://www.readbyqxmd.com/read/29661927/t-independent-ifn%C3%AE-and-b-cells-cooperate-to-prevent-mortality-associated-with-disseminated-chlamydia-muridarum-genital-tract-infection
#19
Taylor B Poston, Catherine M O'Connell, Jenna Girardi, Jeanne E Sullivan, Uma M Nagarajan, Anthony Marinov, Amy M Scurlock, Toni Darville
CD4 T cells and antibody are required for optimal acquired immunity to C. muridarum genital tract infection, and T cell-mediated IFNγ production is necessary to clear infection in the absence of humoral immunity. However, the role of T cell-independent immune responses during primary infection remains unclear. We investigated this question by inoculating wild-type and immune-deficient mice with C. muridarum CM001, a clonal isolate capable of enhanced extragenital replication. Genital inoculation of wild-type mice resulted in transient dissemination to the lungs and spleen that then was rapidly cleared from these organs...
April 16, 2018: Infection and Immunity
https://www.readbyqxmd.com/read/29661828/nasopharyngeal-exposure-to-streptococcus-pneumoniae-induces-extended-age-dependent-protection-against-pulmonary-infection-mediated-by-antibodies-and-cd138-cells
#20
Elsa N Bou Ghanem, Nang H Tin Maung, Nalat Siwapornchai, Aaron E Goodwin, Stacie Clark, Ernesto J Muñoz-Elías, Andrew Camilli, Rachel M Gerstein, John M Leong
Streptococcus pneumoniae commonly resides asymptomatically in the nasopharyngeal (NP) cavity of healthy individuals but can cause life-threatening pulmonary and systemic infections, particularly in the elderly. NP colonization results in a robust immune response that protects against invasive infections. However, the duration, mechanism, and cellular component of such responses are poorly understood. In this study, we found that repeated NP exposure of mice to S. pneumoniae TIGR4 strain results in pneumococcal-specific Ab responses that protect against lethal lung challenge...
April 16, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
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