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Immunology Letters

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https://www.readbyqxmd.com/read/28431963/expansion-of-circulating-follicular-t-helper-cells-associates-with-disease-severity-in-childhood-atopic-dermatitis
#1
Krisztina Szabó, Krisztián Gáspár, Zsolt Dajnoki, Gábor Papp, Beáta Fábos, Andrea Szegedi, Margit Zeher
Follicular helper T (TFH) cells play crucial role in B-cell differentiation and antibody production. Although, atopic dermatitis (AD) is often associated with increased serum IgE levels, B-cell mediated responses have not been studied thoroughly. The aim of our study was to investigate the proportion of TFH-like cells in the disease. Twelve children and 17 adults with AD as well as 14 healthy controls were enrolled in the study. The frequency of CD4(+)CXCR5(+)ICOS(+)PD-1(+) TFH-like cells and their IL-21 cytokine production were determined by flow cytometry...
April 18, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28427887/the-detection-of-antigenic-determinants-of-acinetobacter-baumannii
#2
Dina M Tawfik, Tarek A Ahmad, Salah A Sheweita, Medhat Haroun, Laila H El-Sayed
BACKGROUND: Acinetobacter baumannii continues to pose a threat to burdened patients in ICUs all around the world. Lately, infection control techniques are not sufficient to curb A. baumannii's progression and chemotherapeutics are losing their potency against it. Thus, immunization became a key player in providing an ideal solution to the dilemma. None of the vaccines under investigation have reached the market and the search for a tailored vaccine remains a challenge. The notion of unravelling the bacterial antigens to design a novel epitope-based vaccine proved its merits...
April 17, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28414184/mouse-cytomegalovirus-encoded-immunoevasins-and-evolution-of-ly49-receptors-sidekicks-or-enemies
#3
REVIEW
Jelena Zeleznjak, Branka Popovic, Astrid Krmpotic, Stipan Jonjic, Vanda Juranic Lisnic
Cytomegaloviruses (CMVs) have dedicated a large portion of their genome towards immune evasion targeting many aspects of the host immune system, particularly NK cells. However, the host managed to cope with the infection by developing multiple mechanisms to recognize viral threat and counterattack it, thus illustrating never-ending evolutionary interplay between CMV and its host. In this review, we will focus on several mechanisms of NK cell evasion by mouse CMV (MCMV), the role of host inhibitory and activating Ly49 receptors involved in the virus control and acquisition of adaptive features by NK cells as a consequence of MCMV infection...
April 13, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28414183/nkg2d-a-versatile-player-in-the-immune-system
#4
REVIEW
Vedrana Jelenčić, Maja Lenartić, Felix M Wensveen, Bojan Polić
NKG2D is known as a potent activating receptor of the immune system. It is expressed on a multitude of immune cells, including NK cells and different subsets of T cells. NKG2D recognizes various MHC I-like ligands that are induced on target cells exposed to stressors such as viral infection, DNA damage and oncological transformation. NKG2D drives or facilitates cytotoxic and cytokine responses towards cells expressing its ligands to eliminate the threat. Therefore, NKG2D is usually classified as a sensor that translates cellular stress into activation signals for immune cells...
April 13, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28414182/innate-lymphoid-cells-and-their-stromal-microenvironments
#5
REVIEW
Zoltán Kellermayer, Dóra Vojkovics, Péter Balogh
In addition to the interaction between antigen presenting cells, T and B lymphocytes, recent studies have revealed important roles for a diverse set of auxiliary cells that profoundly influence the induction and regulation of immune responses against pathogens. Of these the stromal cells composed of various non-hematopoietic constituents are crucial for the creation and maintenance of specialized semi-static three-dimensional lymphoid tissue microenvironment, whereas the more recently described innate lymphoid cells are generated by the diversification of committed lymphoid precursor cells independently from clonally rearranged antigen receptor genes...
April 13, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28414181/myeloid-but-not-plasmacytoid-blood-dcs-possess-th1-polarizing-and-th1-th17-recruiting-capacity-in-psoriasis
#6
Ahmed Khasawneh, Sándor Baráth, Barbara Medgyesi, Gabriella Béke, Zsolt Dajnoki, Krisztián Gáspár, Adrienn Jenei, Lilla Pogácsás, Kitti Pázmándi, János Gaál, Attila Bácsi, Andrea Szegedi, Anikó Kapitány
Psoriasis is a common inflammatory skin disease and dendritic cells (DCs) play crucial role in the development of skin inflammation. Although the characteristics of skin DCs in psoriasis are well defined, less is known about their peripheral blood precursors. Our aim was to characterize the phenotypic features as well as the cytokine and chemokine production of CD1c(+) myeloid DCs (mDCs) and plasmacytoid DCs (pDCs) in the blood samples of psoriatic patients. Blood DCs were isolated by using a magnetic separation kit, and their intracytoplasmic cytokine production and CD83/CD86 maturation/activation marker expression were investigated by 8-colour flow cytometry...
April 13, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28414180/serum-tnf-%C3%AE-concentrations-in-type-2-diabetes-mellitus-patients-and-diabetic-nephropathy-patients-a-systematic-review-and-meta-analysis
#7
Yin-Ling Chen, Yong-Chao Qiao, Yan Xu, Wei Ling, Yan-Hong Pan, Yong-Cheng Huang, Li-Jun Geng, Hai-Lu Zhao, Xiao-Xi Zhang
OBJECTIVES: The aim of this study was to investigate whether the concentrations of serum tumor necrosis factor-α (TNF-α), a pro-inflammatory cytokine, increased in type 2 diabetes mellitus (T2DM) and type 2 diabetic nephropathy (T2DN) patients. METHODS: The four databases (PubMed, CNKI, WanFang and Chinese-Cqvip) were searched from Jan 1, 1999 to October 1, 2016 for all clinical case-control studies about the serum TNF-α concentrations in T2DM and T2DN patients...
April 13, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28414179/alteration-of-b-cell-subsets-and-the-receptor-for-b-cell-activating-factor-baff-in-paediatric-patients-with-type-1-diabetes
#8
Zuzana Parackova, Adam Klocperk, Michal Rataj, Jana Kayserova, Irena Zentsova, Zdenek Sumnik, Stanislava Kolouskova, Jana Sklenarova, Stepanka Pruhova, Barbora Obermannova, Lenka Petruzelkova, Jan Lebl, Tomas Kalina, Anna Sediva
BACKGROUND: Lately, mounting evidence has shown that B cells play an important role in the pathogenesis of type 1 diabetes (T1D). Here, we present alterations in B cell subsets including BAFF receptor (BAFFR) expression in cohorts of patients with type 1 diabetes (T1D) and their relatives. PATIENTS AND METHODS: B cells were studied in 438 patients with T1D (158 at disease onset and 280 with long-term disease), 136 first-degree relatives and 53 healthy controls. The B cell panel included transitional, naïve, MZ-like, switched memory B cells and plasmablasts...
April 13, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28392199/short-term-clinical-efficacy-of-percutaneous-irreversible-electroporation-combined-with-allogeneic-natural-killer-cell-for-treating-metastatic-pancreatic-cancer
#9
Mao Lin, Shuzhen Liang, Xiaohua Wang, Yinqing Liang, Mingjie Zhang, Jibing Chen, Lizhi Niu, Kecheng Xu
This study was to determine how the short-term clinical efficacy of irreversible electroporation (IRE) combined with allogeneic natural killer (NK) cell therapy for treating metastatic pancreatic cancer. Between March and December 2016, we enrolled 40 patients who met the enrollment criteria and assigned them to two groups: simple IRE (IRE group, n=20) and IRE plus allogeneic NK cell therapy (IRE-NK, n=20). We evaluated immune function changes, quality of life, clinical response, and other related indicators...
April 6, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28392198/activation-of-cell-membrane-localized-toll-like-receptor-3-by-sirna
#10
Nina Pirher, Jelka Pohar, Mateja Manček-Keber, Mojca Benčina, Roman Jerala
Small interfering RNA molecules (siRNA) are short dsRNAs that are used for different therapeutic applications. On the other hand, dsRNAs can bind to and activate cell RNA sensors and consequently trigger inflammatory response. Here we show that siRNA activates primary human endothelial cells and human lymphatic endothelial cells and that this response is inhibited by antibodies against TLR3. In contrast, the activation of human lymphatic endothelial cells by poly(I:C) was inhibited by bafilomycin but not by anti-TLR3 antibodies...
April 6, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28389319/in-vitro-immunoregulatory-effects-of-thymoglobulin-on-human-immune-cell-subpopulations
#11
Maja Buszko, Bojana Jakic, Christian Ploner, Paul Hoertnagl, Christina Mayerl, Georg Wick, Giuseppe Cappellano
Thymoglobulin (ATG) is a polyclonal rabbit antibody against human thymocytes used as a T cell-depleting agent in organ transplantation. Its polyclonal character suggests that its effect may go far beyond just T cell depletion. The aim of this study was to further elucidate possible mechanisms underlying the suppressive activity of ATG. For in vitro studies, human peripheral blood mononuclear cells (PBMC) were incubated with ATG or control Ig for various time points. Foxp3(+) regulatory cells (Tregs) and monocytes were phenotypically analyzed by flow cytometry and functionally tested by in vitro suppression assays...
April 4, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28389318/engineering-of-a-novel-zipfv-using-leucine-zipper-motif-against-rabies-virus-glycoprotein-g-with-improved-protection-potency-in-vivo
#12
Hualong Xi, Kaixin Zhang, Yanchun Yin, Tiejun Gu, Qing Sun, Zhuang Li, Yue Cheng, Chunlai Jiang, Wei Kong, Yongge Wu
Rabies is an acute zoonotic infectious disease with a high fatality rate but is preventable with vaccination and rabies immunoglobulin (RIG). The single-chain Fv fragment (scFv), a small engineered antigen-binding protein derived from antibody variable heavy (VH) and light (VL) chains connected by a peptide linker, can potentially be used to replace RIG. Here, we produced two peptides VH-JUN-HIS and VL-FOS-HA separately in Escherichia coli and assembled them to form zipFv successfully in vitro. The new zipFv utilizes FOS and JUN leucine zippers to form an antibody structure similar to the IgG counterpart with two free N-terminal ends of VH and VL...
April 4, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28377108/immunological-response-to-mycobacterium-tuberculosis-infection-in-blood-from-type-2-diabetes-patients
#13
Sara Raposo-García, José Manuel Guerra-Laso, Silvia García-García, Javier Juan-García, Eduardo López-Fidalgo, Cristina Diez-Tascón, Teresa Nebreda-Mayoral, Ramiro López-Medrano, Octavio Miguel Rivero-Lezcano
The convergence of tuberculosis and diabetes represents a co-epidemic that threatens progress against tuberculosis. We have investigated type 2 diabetes as a risk factor for tuberculosis susceptibility, and have used as experimental model whole blood infected in vitro with Mycobacterium tuberculosis. Blood samples from diabetic patients were found to have a higher absolute neutrophil count that non-diabetic controls, but their immune functionality seemed impaired because they displayed a lower capacity to phagocytose M...
April 1, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28366526/recombinant-mip-pile-flaa-dominant-epitopes-vaccine-candidate-against-legionella-pneumophila
#14
Jinlei He, Fan Huang, Han Chen, Qiwei Chen, Junrong Zhang, Jiao Li, Dali Chen, Jianping Chen
Legionella pneumophila is the main causative agent of Legionnaires' disease, which is a severe multi-system disease with pneumonia as the primary manifestation. We designed a recombinant Mip-PilE-FlaA dominant epitopes vaccine against Legionella pneumophila to prevent the disease and evaluated its immunogenicity and protective immunity. The protein structures of Mip, PilE and FlaA were analyzed using a computer, and the gene sequences of the dominant epitopes of the three proteins were selected to construct and optimize the vaccine...
March 31, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28366525/vaccinia-virus-evasion-of-regulated-cell-death
#15
REVIEW
David L Veyer, Guia Carrara, Carlos Maluquer de Motes, Geoffrey L Smith
Regulated cell death is a powerful anti-viral mechanism capable of aborting the virus replicative cycle and alerting neighbouring cells to the threat of infection. The biological importance of regulated cell death is illustrated by the rich repertoire of host signalling cascades causing cell death and by the multiple strategies exhibited by viruses to block death signal transduction and preserve cell viability. Vaccinia virus (VACV), a poxvirus and the vaccine used to eradicate smallpox, encodes multiple proteins that interfere with apoptotic, necroptotic and pyroptotic signalling...
March 30, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28359877/a-new-method-of-screening-for-latent-tuberculosis-infection-results-from-army-recruits-in-beijing-in-2014
#16
Xuejuan Bai, Yan Liang, Yourong Yang, Junxian Zhang, Xueqiong Wu
Latent tuberculosis infection (LTBI) lacks diagnostic gold method. Effective method is important to the control of tuberculosis. IFN-γ responses in 600 military recruits were tested by ELISA using whole blood incubation with latent protein Rv2029c, Rv2659c and recombinant protein CFP10-ESAT6 (rCE) respectively. They also received tuberculin skin test. Their BCG vaccination status was recorded. When 30.7% (184/600) of recruits gave higher IFN-γ responses (≥470pg/mL) to rCE as LTBI, the rests as healthy control, the AUC of rRv2029c was 0...
March 27, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28347805/%C3%AE-2-glycoprotein-i-and-its-antibodies-involve-in-the-pathogenesis-of-the-antiphospholipid-syndrome
#17
REVIEW
Aiping Bai
The antiphospholipid syndrome (APS) is characterized by venous or arterial thrombosis, and associated with dysfunctions of endothelial cells and monocytes. β2-glycoprotein I is a phospholipid-binding glycoprotein, and its antibodies have been reported to correlate strongly with thrombotic risk and play putative role in the pathogenesis of APS, whereas the biofunctions of anti-β2-glycoprotein I antibodies remain largely uncertain. It is noted that β2-glycoprotein I exhibits direct interaction with membrane Toll-like receptors, and through this interaction, the complex of β2-glycoprotein I and its antibodies induces intracellular signals via Toll-like receptors, resulting in activation of endothelial cells and monocytes, and expression of proinflammatory cytokines...
March 24, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28341008/serum-vitamin-d-level-in-egyptian-children-with-familial-mediterranean-fever
#18
Hala M Lotfy, Huda Marzouk, Yomna Farag, Ahmed Salah, Heba Taher, Mohamed Nabih, Laila Rashed, Kamal El-Garf
BACKGROUND: The aim of the study is to measure plasma vitamin D levels in a group of Egyptian children with familial Mediterranean fever (FMF) compared to healthy children. METHODS: The study enrolled 52 children with FMF and 40 apparently healthy controls. Serum vitamin D level was measured by enzyme-linked immunosorbent assay. RESULTS: The mean serum vitamin D level was significantly lower in children with FMF than control group (12.3±3...
March 21, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28336415/sncam-as-a-specific-marker-of-peripheral-demyelination
#19
Adam Niezgoda, Sławomir Michalak, Jacek Losy, Alicja Kalinowska-Łyszczarz, Wojciech Kozubski
Adhesion molecules are involved in nerve growth, synaptic plasticity and myelin formation and maintenance process. Neural cell adhesion molecule (CD56 or NCAM) seems to play a crucial role in all the above-mentioned events. Having found poly-sialylated NCAM increased re-expression on demyelinated axons within multiple sclerosis plaques we assessed soluble NCAM (sNCAM) in sera of patients with various types of peripheral nerve affections - demyelinating, axonal "inflammatory", axonal metabolic polyneuropathies and healthy controls...
March 21, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28322860/interleukin-37-in-endometriosis
#20
Wajih Kaabachi, Olfa Kacem, Rafik Belhaj, Agnes Hamzaoui, Kamel Hamzaoui
Interleukin-37 (IL-37) has been identified as a novel anti-inflammatory cytokine. The present study aimed to evaluate the expression of IL-37 in serum and in peritoneal fluid to determine its clinical significance in endometriosis. Enzyme-linked immunosorbent assay (ELISA) was performed to examine serum IL-37 levels in patients with endometriosis and healthy controls. Peritoneal fluid IL-37 mRNA and NFκB expression were quantified by real-time reverse transcription polymerase chain reaction assays. The association of IL-37 levels with clinical factors and prognosis of endometriosis was analysed...
March 18, 2017: Immunology Letters
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