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Scandinavian Journal of Immunology

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https://www.readbyqxmd.com/read/28605050/the-abl-1-kinase-is-dispensable-for-nk-cell-inhibitory-signaling-and-is-not-involved-in-murine-nk-cell-education
#1
S Ganesan, T L Thanh, N Kadri, B J Chambers, S Meinke, P Brodin, E Vivier, D M Wetzel, A J Koleske, P Höglund
Natural killer (NK) cell responsiveness in the mouse is determined in an education process guided by inhibitory Ly49 and NKG2A receptors binding to MHC class I molecules. It has been proposed that inhibitory signaling in human NK cells involves Abl-1 (c-Abl)-mediated phosphorylation of Crk, lowering NK cell function via disruption of a signaling complex including C3G and c-Cbl, suggesting that NK cell education might involve c-Abl. Mice deficient in c-Abl expression specifically in murine NK cells displayed normal inhibitory and activating receptor repertoires...
June 12, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/28561325/assays-for-infliximab-drug-levels-and-antibodies-a-matter-of-scales-and-categories
#2
L Bader, S M Solberg, S H Kaada, N Bolstad, D J Warren, S Gavasso, C G Gjesdal, C A Vedeler
Immunogenicity is a frequent cause of secondary non-response to tumor necrosis factor (TNF) inhibitors. Drug level measurement and detection of anti-drug antibodies has been shown to be cost-effective and clinically relevant, and a large number of assays are available for these purposes. It is, however, difficult to compare assays and translate results into clinical meaningful information due to different methodological approaches and a lack of assay standardization. We have analyzed infliximab drug levels and anti-drug antibodies in 107 patient samples using enzyme-linked immunoassays (ELISA), immunofluorometric assays (IFMA), and reporter gene assays (RGA) for drug and for antibody...
May 31, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/28561280/anti-fc%C3%AE-riib-cd32-antibodies-differentially-modulate-murine-fviii-specific-recall-response-in-vitro
#3
Nadine Vollack, Julia Friese, Sabine Bergmann, Mark S Cragg, Andreas Tiede, Sonja Werwitzke
Fc gamma receptors (FcγRs) for IgG regulate adaptive immune responses by modulating activating and inhibitory signaling pathways within immune cells. Data from a hemophilia A mouse model demonstrate that genetic deletion or blockade of the inhibitory FcγR (CD32) suppresses the formation of antibody secreting cells (ASCs) in vitro. Mechanisms preventing the FVIII-specific recall response, however, remain unclear. Here, the potential role of CD32 inhibition was studied by differentially modulating receptor activity with selected anti-CD32 monoclonal antibodies (mAbs)...
May 31, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/28547744/bacterial-fmlp-modulates-both-ros-and-chemotaxis
#4
LETTER
Ritesh Kumar Tiwari
I have recently read an article entitled," Bacterial N-formyl Peptides Reduce PMA- and E.coli-induced Neutrophil Respiratory Burst in Term Neonates and Adults" by Stålhammar et al. published in the Scandinavian Journal of Immunology[1]. The paper nicely showed that fMLP at higher doses (>1nM) reduces the amount of ROS generated thus it may alter the course of immunopathology or clearance of infection. I would like to make a contribution to the above findings. This article is protected by copyright. All rights reserved...
May 26, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/28543378/renal-transplantation-in-patients-with-pre-existing-hypogammaglobulinemia
#5
K P Lund, H Bruunsgaard, H V Marquart, S S Sørensen
Hypogammaglobulinemia is well-characterized as a common phenomenon after kidney transplantation. However, no reports of pre-existing hypogammaglobulinemia from kidney transplantation seem to be available. We have reviewed three patients who developed hypogammaglobulinemia prior to kidney transplantation, and all three were treated successfully with immunoglobulin-replacement therapy before and after kidney transplantation. The kidney grafts were functioning at follow-up 1.5 to 8 years (mean: 3.6 years) after transplantation, and there were no diagnosed episodes of clinical rejections and no severe infection complications post-transplantation...
May 22, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/28513991/immunoprotective-effect-of-chitosan-particles-on-hymenolepis-nana-infected-mice
#6
Mahmoud Abdel-Latif, Gamal El-Shahawi, Shawky M Aboelhadid, Heba Abdel-Tawab
Hymenolepis nana is the most commonly known intestinal cestode infecting mainly human. The present study aimed to investigate the potential effect of chitosan particles (CSP) to enhance the immune system against H. nana infection. Determination of worm burden, egg output, histopathological changes, oxidative stress markers (lipid peroxidation & reduced glutathione), goblet (GCs) and mucosal mast cells (MMCs) counts in intestinal ileum were performed. In addition, levels of intestinal mRNA expression of interleukin (IL)-4, IL-9, stem cell factor (SCF), type I & II interferons (IFN)-α/ γ, tumor necrosis factor (TNF)-α, mucin 2 (MUC2), and inducible nitric oxide synthase (iNOs) were investigated using real-time PCR...
May 17, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/28513984/spd-l1-expression-is-associated-with-immunosuppression-and-infectious-complications-in-patients-with-acute-pancreatitis
#7
Yang Chen, Meiling Li, Jialin Liu, Tingting Pan, Tianyun Zhou, Zhaojun Liu, Ruoming Tan, Xiaoli Wang, Lijun Tian, Erzhen Chen, Hongping Qu
Acute pancreatitis (AP) with infectious complications has high mortality because of early-stage immunosuppression. The programmed cell death-1 (PD-1)/programmed cell death ligand 1 (PD-L1) pathway is an important host immunosuppression mechanism. Soluble PD-L1 (sPD-L1) expression regulates coinhibitory signals in malignancies or autoimmune disorders; however, its effects in AP are unknown. Here, we evaluated whether serum sPD-L1 is involved in immune dysfunction and assessed its relationship with infectious complications in early AP...
May 17, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/28513867/the-role-of-circulating-t-follicular-helper-cells-and-regulatory-cells-in-non-small-cell-lung-cancer-patients
#8
Zhenxing Guo, Hailong Liang, Yaru Xu, Li Liu, Xiuhong Ren, Songsong Zhang, Shenhai Wei, Peng Xu
T follicular helper (Tfh) cells and T follicular regulatory (Tfr) cells are identified as the new subset of immune cells. This study aims to investigate the role of circulating Tfh cells (cTfh) and Tfr (cTfr) cells in the pathogenesis of non-small cell lung cancer (NSCLC). A total of 27 NSCLC patients and 19 age and sex matched healthy controls were enrolled. The percentage of cTfh and cTfr was detected by flow cytometric analysis. Compared to healthy controls, a significantly higher percentage of both cTfh and cTfr cells were observed in NSCLC patients (for cTfh, 18...
May 17, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/28513865/diagnosis-of-tuberculosis-in-hiv-co-infected-individuals-current-status-challenges-and-opportunities-for-the-future
#9
REVIEW
P Méndez-Samperio
Tuberculosis (TB) remains one of the most important causes of death amongst people co-infected with human immunodeficiency virus (HIV). The diagnosis of TB remains challenging in HIV co-infected individuals, due to a high frequency of smear-negative disease and high rates of extrapulmonary TB. Accurate, ease of use, and rapid diagnosis of active TB is critical to the World Health Organization (WHO) End TB Strategy by 2050. Traditional laboratory techniques do not provide rapid and accurate results to effectively manage HIV co-infected patients...
May 17, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/28500763/cross-talk-between-enzymes-matrix-metalloproteinsese-2-and-9-and-regulatory-t-cell-immunity-in-the-global-burden-of-atherosclerosis
#10
Andrica Lekic, Zdrinko Brekalo, Ante Kvesic, Miljenko Kovacevic, Zdenka Baricev-Novakovic, Ivana Sutic, Aleksandar Bulog, Ingrid Sutic, Valentino Pavisic, Ines Mrakovcic-Sutić
Changes in immune and inflammatory responses may play a crucial role in the development and progression of atherosclerosis, as an autoimmune, chronic and progressive inflammatory disease. Immunological activity and vascular inflammation during atherosclerosis can be modulated by autoimmune responses against self-antigens, according to changeable risk factors (cholesterol, oxidized low-density lipoprotein (ox-LDL) in the vascular wall, fatty acids, etc.) and accompanied by accumulation of leucocytes and proinflammatory cytokines, which stimulate the transcription of matrix-metalloproteinases (MMPs), whose concentration are increased in foam cell rich regions...
May 13, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/28480606/chlamydia-pneumoniae-induces-interferon-gamma-responses-in-peripheral-blood-mononuclear-cells-in-children-with-allergic-asthma
#11
Tamar A Smith-Norowitz, Diana Weaver, Valeriy Chorny, Yitzchok M Norowitz, Danielle Lent, Margaret R Hammerschlag, Rauno Joks, Stephan Kohlhoff
Respiratory infections caused by Chlamydia pneumoniae have been associated with exacerbations of asthma. Cell mediated immunity (CMI) is critical for maintaining immunity. We compared Interferon (IFN)-γ responses in C. pneumoniae-infected peripheral blood mononuclear cells (PBMC) in pediatric patients +/- asthma. Presence of C. pneumoniae was tested from asthma patients (N=17) and non-asthmatic controls (N=16) (PCR). PBMC were infected for 1 hr +/- C. pneumoniae AR-39 (MOI = 0.1), and cultured for 48 hrs. IFN-γ levels were measured in supernatants (ELISA)...
May 8, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/28474755/the-roles-of-tlr-gene-polymorphisms-in-atherosclerosis-a-systematic-review-and-meta-analysis-of-35-317-subjects
#12
REVIEW
Xiaochuan Xie, Xiaohan Shi, Meilin Liu
Recently, the roles of toll like receptor (TLR) gene polymorphisms in atherosclerotic diseases were extensively investigated, with conflicting results. Therefore, we performed the present study to better assess the relationship between TLR gene variants and atherosclerosis. Eligible studies were searched in PubMed, Medline, Embase, Web of Science, and CNKI. Odds ratios (ORs) with 95% confidence intervals (CIs) were used to estimate associations between TLR gene polymorphisms and atherosclerosis. A total of 40 studies covering 19,657 cases and 15,660 controls were finally included in our systematic review and meta-analysis...
May 5, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/28449222/tspan33-is-expressed-in-transitional-and-memory-b-cells-but-is-not-responsible-for-high-adam10-expression
#13
César Augusto Pérez-Martínez, José Luis Maravillas-Montero, Iván Meza-Herrera, Felipe Vences-Catalán, Albert Zlotnik, Leopoldo Santos-Argumedo
Tetraspanins are a family of transmembrane proteins that form membrane microdomains. They play important roles in migration, adhesion, and other cellular processes. TspanC8, a subfamily of tetraspanins, were found to associate and promote ADAM10 trafficking and cell surface localization. One of its members, Tspan33, is expressed in activated B cells. Using RT-PCR and flow cytometry, we analyzed the pattern of expression of Tspan33 in B cells from healthy donors. We found Tspan33 expression in early and late stages of B cell development...
April 27, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/28426172/distinct-roles-of-th17-and-th1-cells-in-inflammatory-responses-associated-with-the-presentation-of-paucibacillary-leprosy-and-leprosy-reactions-th17-immune-response-in-leprosy
#14
Márcio Bezerrra Santos, Daniela Teles de Oliveira, Rodrigo Anselmo Cazzaniga, Crisuelle Santana Varjão, Priscila Lima Dos Santos, Micheli L B Santos, Cristiane Bane Correia, Daniela R Faria, Marise do Vale Simon, João Santana Silva, Walderez O Dutra, Steven G Reed, Malcolm S Duthie, Roque Pahceco de Almeida, Amélia Ribeiro de Jesus
It is well established that helper T cell responses influence resistance or susceptibility to Mycobacterium leprae infection, but the role of more recently described helper T cell subsets in determining severity is less clear. To investigate the involvement of Th17 cells in the pathogenesis of leprosy, we determined the immune profile with variant presentations of leprosy. Firstly, IL-17A, IFN-γ and IL-10 were evaluated in conjunction with CD4(+) T cell staining by confocal microscopy of lesion biopsies from tuberculoid (TT) and lepromatous (LL) patients...
April 20, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/28426153/a-non-pathogenic-recombinant-leishmania-expressing-lipophosphoglycan-3-against-experimental-infection-with-leishmania-infantum
#15
Leila Pirdel, Safar Farajnia
Visceral leishmaniasis (VL) is caused by Leishmania infantum in the Mediterranean basin and affects primarily children and immunosuppressed individuals. Various strategies of vaccination have so far been examined by either protein or DNA without achievable complete protection against the disease. The live non-pathogenic lizard parasite, Leishmania tarentolae, expressing elected Leishmania antigens has recently provided a promising new approach as a safe and effective live vaccine candidate to prevent leishmaniasis...
April 20, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/28426145/subunit-vaccines-consisting-of-antigens-from-dormant-and-replicating-bacteria-show-promising-therapeutic-effect-against-mycobacterium-bovis-bcg-latent-infection
#16
Fei Li, Hongfei Kang, Jingjing Li, Dengcai Zhang, Ying Zhang, Arthur M Dannenberg, Xun Liu, Hongxia Niu, Lan Ma, Ruitian Tang, Xue Han, Chao Gan, Xingming Ma, Jiying Tan, Bingdong Zhu
To screen effective antigens as therapeutic subunit vaccines against Mycobacterium latent infection, we did bioinformatics analysis and literature review to identify effective antigens and evaluated the immunogenicity of five antigens highly expressed in dormant bacteria, which included Rv2031c (HspX), Rv2626c (Hrp1), Rv2007c (FdxA), Rv1738 and Rv3130c. Then, several fusion proteins such as Rv2007c-Rv2626c (F6), Rv2031c-Rv1738-Rv1733c (H83), ESAT6-Rv1738-Rv2626c (LT40), ESAT6-Ag85B-MPT64<190-198> -Mtb8...
April 20, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/28426141/melanocortin-2-3-and-4-receptor-gene-expressions-are-downregulated-in-cd8-t-cytotoxic-lymphocytes-and-cd19-b-lymphocytes-in-rheumatoid-arthritis-responding-to-tnf%C3%AE-inhibition
#17
Marlene Andersen, Ivan Nagaev, Michael Kruse Meyer, Olga Nagaeva, Jarl Wikberg, Lucia Mincheva-Nilsson, Grethe Neumann Andersen
Melanocortin signaling in leukocyte subsets elicits anti-inflammatory and immune tolerance inducing effects in animal experimental inflammation. In man, however, the effects of melanocortin signaling in inflammatory conditions have scarcely been examined. We explored the differential reactions of melanocortin 1-5 receptor (MC1-5R) gene expressions in pathogenetic leukocyte subsets in rheumatoid arthritis (RA) to treatment with TNFα inhibitor adalimumab. Seven patients with active RA donated blood at start and at three months treatment...
April 20, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/28426135/tlr-stimulated-eosinophils-mediate-recruitment-and-activation-of-nk-cells-in-vivo
#18
Shaunagh M O'Flaherty, Kripitch Sutummaporn, Walina L Häggtoft, Amy P Worrall, Marzia Rizzo, Viorica Braniste, Petter Höglund, Nadir Kadri, Benedict J Chambers
Eosinophils like many myeloid innate immune cells can provide cytokines and chemokines for the activation of other immune cells upon TLR stimulation. When TLR stimulated eosinophils were inoculated i.p. into wildtype mice, NK cells were rapidly recruited and exhibited anti-tumor cytotoxicity. However when mice depleted of CD11c(+) cells were used, a marked decrease in the number of recruited NK cells was observed. We postulated that CpG or LPS from the injected eosinophils could be transferred to host cells, which in turn could recruit NK cells...
April 20, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/28387980/immune-balance-in-hepatitis-b-infection-present-and-future-therapies
#19
REVIEW
Ashish Kumar Vyas, Ankur Jindal, Syed Hissar, Gayatri Ramakrishna, Nirupama Trehanpati
Chronic hepatitis B virus (HBV) infection affects millions of people worldwide and about half a million people die every year. India represents the second largest pool of chronic HBV infections with an estimated 40 million chronically infected patients. Persistence or clearance of HBV infection mainly depends upon host immune responses. Chronically infected individuals remain in immune tolerant phase unless HBV flares and leads to development of chronic active hepatitis or acute on chronic liver failure. Strategies based on inhibition of viral replication (nucleoside analogues) or immune modulation (Interferons) as monotherapy, or in combination in sequential therapies, are currently being used globally for reducing HBV viral load and mediating HBsAg clearance...
April 7, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/28376277/dendritic-cells-from-rheumatoid-arthritis-patient-peripheral-blood-induce-th17-cell-differentiation-via-mir-363-integrin-%C3%AE-v-tgf-%C3%AE-axis
#20
Feng Pan, Haiyan Xiang, Juzhen Yan, Liquan Hong, Lahong Zhang, Yuhua Liu, Xiao Feng, Chengsong Cai
BACKGROUND AND AIM: Dendritic cells (DCs) are critical regulators of immune responses. This study was to observe the effect of DCs from peripheral blood on the differentiation of Th17 in rheumatoid arthritis (RA) patients. METHODS AND RESULTS: Peripheral blood samples were collected from 30 RA patients and 20 healthy controls, respectively. Flow cytometry results showed that in contrast with Treg cells, the proportion of Th17 cells in T cells and the Th17/Treg ratio were both increased in RA patients...
April 4, 2017: Scandinavian Journal of Immunology
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