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BMC Immunology

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https://www.readbyqxmd.com/read/28651553/ig-and-tr-single-chain-fragment-variable-scfv-sequence-analysis-a-new-advanced-functionality-of-imgt-v-quest-and-imgt-highv-quest
#1
Véronique Giudicelli, Patrice Duroux, Sofia Kossida, Marie-Paule Lefranc
BACKGROUND: IMGT®, the international ImMunoGeneTics information system® ( http://www.imgt.org ), was created in 1989 in Montpellier, France (CNRS and Montpellier University) to manage the huge and complex diversity of the antigen receptors, and is at the origin of immunoinformatics, a science at the interface between immunogenetics and bioinformatics. Immunoglobulins (IG) or antibodies and T cell receptors (TR) are managed and described in the IMGT® databases and tools at the level of receptor, chain and domain...
June 26, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28651547/autoantibodies-against-baff-april-or-il21-an-alternative-pathogenesis-for-antibody-deficiencies
#2
Marian-Christopher Pott, Natalie Frede, Jennifer Wanders, Lennart Hammarström, Erik-Oliver Glocker, Cristina Glocker, Fariba Tahami, Bodo Grimbacher
BACKGROUND: The ability of anti-cytokine antibodies to play a disease-causing role in the pathogenesis of immunodeficiencies is widely accepted. The aim of this study was to investigate whether autoantibodies against BAFF (important B cell survival signal), APRIL (important plasma cell survival signal), or Interleukin-21 (important cytokine for immunoglobulin class switch) present an alternative mechanism for the development of the following primary antibody deficiencies (PADs): common variable immune deficiency (CVID) or selective IgA deficiency (sIgAD)...
June 26, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28646856/the-imbalance-of-th17-treg-cells-is-involved-in-the-progression-of-nonalcoholic-fatty-liver-disease-in-mice
#3
Beihui He, Liyan Wu, Wei Xie, Yitong Shao, Jianping Jiang, Zhenzhong Zhao, Maoxiang Yan, Zhiyun Chen, Dawei Cui
BACKGROUND: Non-alcoholic fatty liver disease (NAFLD) is a common, chronic liver disease worldwide. Recent studies have shown that T helper (Th) 17 and regulatory T (Treg) cells play critical roles in various disorders of liver inflammation. Here, we explored the value of polyene phosphatidylcholine capsules (PPC) for regulating the imbalance of Th17/Treg cells in the pathogenesis of mice with NAFLD. METHODS: C57BL/6 mice were randomly divided into three groups as follows:normal diet (ND), high-fat diet (HF),and HF plus PPC(HF + PPC)...
June 24, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28645246/igmk-paraprotein-from-gammopathy-patient-can-bind-to-cardiolipin-and-interfere-with-coagulation-assay-a-case-report
#4
Xin-Yao Wu, Yu-Feng Yin, Jia-Lin Teng, Li-Wei Zhang, Cheng-de Yang
BACKGROUND: The monoclonal gammopathies are a group of plasma-cell proliferative disorders characterized by the secretion of monoclonal immunoglobulin (M protein or paraprotein). Some rare cases have revealed the specific affinity of paraprotein as autoantibody. Here we report a patient with monoclonal gammopathy of undetermined significance (MGUS) accompanied by a remarkable increase of anticardiolipin antibody (aCL) and an extensively decreased coagulation factor activity, however, without any clinical signs of antiphospholipid syndrome (APS) and bleeding...
June 23, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28633645/generation-of-populations-of-antigen-specific-cytotoxic-t-cells-using-dcs-transfected-with-dna-construct-encoding-her2-neu-tumor-antigen-epitopes
#5
Maria Kuznetsova, Julia Lopatnikova, Julia Khantakova, Rinat Maksyutov, Amir Maksyutov, Sergey Sennikov
BACKGROUND: Recent fundamental and clinical studies have confirmed the effectiveness of utilizing the potential of the immune system to remove tumor cells disseminated in a patient's body. Cytotoxic T lymphocytes (CTLs) are considered the main effectors in cell-mediated antitumor immunity. Approaches based on antigen presentation to CTLs by dendritic cells (DCs) are currently being intensively studied, because DCs are more efficient in tumor antigen presentation to T cells through their initiation of strong specific antitumor immune responses than other types of antigen-presenting cells...
June 20, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28619036/monocyte-differentiation-and-macrophage-priming-are-regulated-differentially-by-pentraxins-and-their-ligands
#6
Darrell Pilling, Elkin Galvis-Carvajal, Tejas R Karhadkar, Nehemiah Cox, Richard H Gomer
BACKGROUND: Circulating bone marrow-derived monocytes can leave the blood, enter a tissue, and differentiate into M1 inflammatory, M2a remodeling/fibrotic, or M2c/Mreg resolving/immune-regulatory macrophages. Macrophages can also convert from one of the above types to another. Pentraxins are secreted proteins that bind to, and promote efficient clearance of, microbial pathogens and cellular debris during infection, inflammation, and tissue damage. The pentraxins C-reactive protein (CRP), serum amyloid P (SAP), and pentraxin-3 (PTX3) can also bind a variety of endogenous ligands...
June 15, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28558649/long-term-leukocyte-reconstitution-in-nsg-mice-transplanted-with-human-cord-blood-hematopoietic-stem-and-progenitor-cells
#7
Annette Audigé, Mary-Aude Rochat, Duo Li, Sandra Ivic, Audrey Fahrny, Christina K S Muller, Gustavo Gers-Huber, Renier Myburgh, Simon Bredl, Erika Schlaepfer, Alexandra U Scherrer, Stefan P Kuster, Roberto F Speck
BACKGROUND: Humanized mice (hu mice) are based on the transplantation of hematopoietic stem and progenitor cells into immunodeficient mice and have become important pre-clinical models for biomedical research. However, data about their hematopoiesis over time are scarce. We therefore characterized leukocyte reconstitution in NSG mice, which were sublethally irradiated and transplanted with human cord blood-derived CD34+ cells at newborn age, longitudinally in peripheral blood and, for more detailed analyses, cross-sectionally in peripheral blood, spleen and bone marrow at different time points...
May 30, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28525970/the-immunoregulatory-role-of-alpha-enolase-in-dendritic-cell-function-during-chlamydia-infection
#8
Khamia Ryans, Yusuf Omosun, Danielle N McKeithen, Tankya Simoneaux, Camilla C Mills, Nathan Bowen, Francis O Eko, Carolyn M Black, Joseph U Igietseme, Qing He
BACKGROUND: We have previously reported that interleukin-10 (IL-10) deficient dendritic cells (DCs) are potent antigen presenting cells that induced elevated protective immunity against Chlamydia. To further investigate the molecular and biochemical mechanism underlying the superior immunostimulatory property of IL-10 deficient DCs we performed proteomic analysis on protein profiles from Chlamydia-pulsed wild-type (WT) and IL-10(-/-) DCs to identify differentially expressed proteins with immunomodulatory properties...
May 19, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28511637/the-cytokine-polymorphisms-affecting-th1-th2-increase-the-susceptibility-to-and-severity-of-chronic-itp
#9
Noriyuki Takahashi, Takayuki Saitoh, Nanami Gotoh, Yasuhiro Nitta, Lobna Alkebsi, Tetsuhiro Kasamatsu, Yusuke Minato, Akihiko Yokohama, Norifumi Tsukamoto, Hiroshi Handa, Hirokazu Murakami
BACKGROUND: T-helper cell type 1 (Th1) polarization in chronic immune thrombocytopenia (cITP) has been reported at the protein and mRNA levels. We evaluated the impact of Th1/Th2 cytokine and cytokine receptor functional polymorphisms on both susceptibility to, and severity of, cITP. We analysed IFN-γ + 874 T/A, IFN-γR -611G/A, IL-4 -590C/T, and IL-4Rα Q576R polymorphisms in 126 cITP patients (male/female: 34/92; median age: 47.7 years) and 202 healthy control donors. Genotyping was determined by PCR and direct sequencing...
May 16, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28506209/peptides-mimicking-viral-proteins-of-porcine-circovirus-type-2-were-profiled-by-the-spectrum-of-mouse-anti-pcv2-antibodies
#10
Ling-Chu Hung, Cheng-Yao Yang, Ivan-Chen Cheng
BACKGROUND: Porcine circovirus 2 (PCV2) is a small, non-enveloped DNA virus causing swine lymphocyte depletion and severe impact on the swine industry. The aim of this study was to evaluate the antigenicity and immunogenicity of specific peptides, and seeking the potential candidate of PCV2 peptide-based vaccine. It's initiating from peptides reacting with PCV2-infected pig sera and peptide-immunized mouse sera. RESULTS: The data showed that the sera from PCV2-infected pigs could react with the N-terminal (C1), middle region (C2), and C-terminal peptide (C3) of PCV2 capsid protein (CP), ORF3 protein (N1), ORF6 protein (N2) and ORF9 protein (N3)...
May 15, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28468643/recombinant-salmonella-expressing-ssph2-esci-fusion-protein-limits-its-colonization-in-mice
#11
Maozhi Hu, Weixin Zhao, Wei Gao, Wenhua Li, Chuang Meng, Qiuxiang Yan, Yuyang Wang, Xiaohui Zhou, Shizhong Geng, Zhiming Pan, Guiyou Cui, Xinan Jiao
BACKGROUND: Activation of inflammasome contributes to the clearance of intracellular bacteria. C-terminus of E. coli EscI protein can activate NLRC4 (NLR family, CARD domain containing-4) inflammasome in macrophages. The purpose of this study was to determine if activation of NLRC4 inflammasome by EscI can reduce the colonization of Salmonella in mice. RESULTS: A recombinant S. typhimurium strain expressing fusion protein of the N-terminal SspH2 (a Salmonella type III secretion system 2 effector) and C-terminal EscI was constructed and designated as X4550(pYA3334-SspH2-EscI)...
May 3, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28438134/poly-i-c-induces-collective-migration-of-hacat-keratinocytes-via-il-8
#12
Kazuhide Takada, Shihoko Komine-Aizawa, Naoko Hirohata, Quang Duy Trinh, Atsuyoshi Nishina, Hirokazu Kimura, Satoshi Hayakawa
BACKGROUND: Delayed wound healing reduces the quality of life (QOL) of patients. Thus, understanding the mechanism of wound healing is indispensable for better management. However, the role of innate immunity in wound healing is thus far unknown. Recently the involvement of TLR3 in wound healing has been evaluated. The systemic administration of polyriboinosinic-polyribocytidylic acid (poly I:C ; a substitute for viral dsRNA and a ligand of toll-like receptor 3), enhances wound healing in vivo...
April 24, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28356069/broad-induction-of-immunoregulatory-mechanisms-after-a-short-course-of-anti-il-7r%C3%AE-antibodies-in-nod-mice
#13
Cristina Vazquez-Mateo, Justin Collins, Michelle Fleury, Hans Dooms
BACKGROUND: Type 1 diabetes is an autoimmune disease caused by T cell-mediated destruction of the insulin-producing β-cells in the pancreas. Therefore, approaches that effectively halt the pathogenic T cell response are predicted to have preventive or therapeutic benefit for type 1 diabetes patients. We previously demonstrated that long-term blocking of IL-7 signaling, which is critical for the survival and function of T cells, prevented and reversed type 1 diabetes in non-obese diabetic mice...
March 29, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28351341/impact-of-disease-activity-on-health-related-quality-of-life-in-systemic-lupus-erythematosus-a-cross-sectional-analysis-of-the-swiss-systemic-lupus-erythematosus-cohort-study-sscs
#14
Benjamin Chaigne, Carlo Chizzolini, Thomas Perneger, Marten Trendelenburg, Uyen Huynh-Do, Eric Dayer, Thomas Stoll, Johannes von Kempis, Camillo Ribi
BACKGROUND: To assess the impact of disease activity on health-related quality of life (HRQoL) in systemic lupus erythematosus (SLE). METHODS: Cross-sectional study of patients included in the Swiss SLE Cohort Study between April 2007 and June 2014. HRQoL outcomes were based on the Medical Outcome Study Short Form 36 (SF-36). Disease activity was assessed by the SLE Disease Activity Index score with the Safety of Estrogens in SLE National Assessment modification (SELENA-SLEDAI) and by the physican's global assessment (PGA)...
March 28, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28283017/forkhead-box-transcription-factor-1-affects-the-apoptosis-of-natural-regulatory-t-cells-by-controlling-aven-expression
#15
Zhitao Cai, Hong Liu, Xiongfei Wu
BACKGROUND: Regulatory T (Treg) cells play important roles in autoimmune diseases, cancer, and organ transplantation. Forkhead box protein o1 (Foxo1) and IL-7Rα(CD127) are closely related to the homeostasis of Treg cells. However, the mechanism underlying Treg proliferation and activation remains unclear. Here, we evaluated how the over-expression of Foxo1 affects Treg cell proliferation via intracellular signaling. nTreg cells were transfected separately with Foxo1 and Aven small-interfering RNA (siRNA) or over-expression plasmid...
March 10, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28270111/an-optimized-ifn-%C3%AE-elispot-assay-for-the-sensitive-and-standardized-monitoring-of-cmv-protein-reactive-effector-cells-of-cell-mediated-immunity
#16
Sascha Barabas, Theresa Spindler, Richard Kiener, Charlotte Tonar, Tamara Lugner, Julia Batzilla, Hanna Bendfeldt, Anne Rascle, Benedikt Asbach, Ralf Wagner, Ludwig Deml
BACKGROUND: In healthy individuals, Cytomegalovirus (CMV) infection is efficiently controlled by CMV-specific cell-mediated immunity (CMI). Functional impairment of CMI in immunocompromized individuals however can lead to uncontrolled CMV replication and severe clinical complications. Close monitoring of CMV-specific CMI is therefore clinically relevant and might allow a reliable prognosis of CMV disease as well as assist personalized therapeutic decisions. METHODS: Objective of this work was the optimization and technical validation of an IFN-γ ELISpot assay for a standardized, sensitive and reliable quantification of CMV-reactive effector cells...
March 7, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28270092/validation-of-t-track%C3%A2-cmv-to-assess-the-functionality-of-cytomegalovirus-reactive-cell-mediated-immunity-in-hemodialysis-patients
#17
Bernhard Banas, Carsten A Böger, Gerhard Lückhoff, Bernd Krüger, Sascha Barabas, Julia Batzilla, Mathias Schemmerer, Josef Köstler, Hanna Bendfeldt, Anne Rascle, Ralf Wagner, Ludwig Deml, Joachim Leicht, Bernhard K Krämer
BACKGROUND: Uncontrolled cytomegalovirus (CMV) replication in immunocompromised solid-organ transplant recipients is a clinically relevant issue and an indication of impaired CMV-specific cell-mediated immunity (CMI). Primary aim of this study was to assess the suitability of the immune monitoring tool T-Track® CMV to determine CMV-reactive CMI in a cohort of hemodialysis patients representative of patients eligible for renal transplantation. Positive and negative agreement of T-Track® CMV with CMV serology was examined in 124 hemodialysis patients, of whom 67 (54%) revealed a positive CMV serostatus...
March 7, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28264652/insight-into-snps-and-epitopes-of-e-protein-of-newly-emerged-genotype-i-isolates-of-jev-from-midnapur-west-bengal-india
#18
Shyamashree Banerjee, Parth Sarthi Sen Gupta, Amal Kumar Bandyopadhyay
BACKGROUND: Japanese encephalitis virus (JEV) is a mosquito-borne flavivirus that causes Japanese Encephalitis (JE) and Acute Encephalitis Syndrome (AES) in humans. Genotype-I (as co-circulating cases with Genotype-III) was isolated in 2010 (JEV28, JEV21) and then in 2011 (JEV45) from Midnapur district, West Bengal (WB) for the first time from clinical patients who were previously been vaccinated with live attenuated SA14-14-2 strain. We apply bioinformatics and immunoinformatics on sequence and structure of E protein for analysis of crucial substitutions that might cause the genotypic transition, affecting protein-function and altering specificity of epitopes...
March 6, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28241799/immunogenicity-and-therapeutic-effects-of-a-mycobacterium-tuberculosis-rv2190c-dna-vaccine-in-mice
#19
Yan Liang, Xiaoyan Zhang, Xuejuan Bai, Li Xiao, Xiaomei Wang, Junxian Zhang, Yourong Yang, Jinying Song, Lan Wang, Xueqiong Wu
BACKGROUND: Tuberculosis (TB) is a major global public health problem. New treatment methods on TB are urgently demanded. In this study, Mycobacterium tuberculosis (MTB) rv2190c DNA vaccine was prepared and its immunogenicity and therapeutic effects were evaluated. RESULTS: Non-infected mice immunized with rv2190c DNA or ag85a DNA showed higher levels of interferon-gamma (IFN-γ) in stimulated spleen lymphocyte culture supernatants, and had more Th1 cells and an elevatory ratio of Th1/Th2 immune cells in whole blood, indicating that Th1-type immune response was predominant...
February 27, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28241791/lipopolysaccharide-mediates-immuno-pathological-alterations-in-young-chicken-liver-through-tlr4-signaling
#20
Xi-Yao Huang, Abdur Rahman Ansari, Hai-Bo Huang, Xing Zhao, Ning-Ya Li, Zhi-Jian Sun, Ke-Mei Peng, Juming Zhong, Hua-Zhen Liu
BACKGROUND: Lipopolysaccharide (LPS) induces acute liver injury and the complex mechanisms include the activation of toll like receptor 4 (TLR4) signaling pathway in many species. However, immuno-pathological changes during TLR4 signaling under LPS stress in acute liver injury is poorly understood in avian species. The present investigation was therefore carried out to evaluate these alterations in TLR4 signaling pathway during acute liver injury in young chickens. RESULTS: After intraperitoneal injection of LPS or saline, liver samples were harvested at 0, 2, 6, 12, 24, 36, 72 and 120 h (n = 6 at each time point) and the microstructures were analyzed by hematoxylin and eosin (H&E) staining...
February 27, 2017: BMC Immunology
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