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Human antigen r

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https://www.readbyqxmd.com/read/28225338/potential-biomarkers-associated-with-discrimination-between-latent-and-active-pulmonary-tuberculosis
#1
R Kamakia, S Kiazyk, J Waruk, A Meyers, J Ochanda, T B Ball, J Oyugi
SETTING: A third of the world's population has latent tuberculous infection (LTBI). Current TB diagnostics used in developing countries are ineffective and are unable to distinguish LTBI from active TB. Identifying biomarkers that could aid in the early detection of TB and in distinguishing TB states could be a major breakthrough in global TB control. OBJECTIVE: To identify potential immune biomarkers to distinguish active TB from LTBI. DESIGN: A cross-sectional study was conducted among 19 active TB patients, 8 TB-negative individuals (controls) and 16 LTBI non-human immunodeficiency virus infected individuals in Nairobi, Kenya...
March 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28223366/la-deletion-from-mouse-brain-alters-pre-trna-metabolism-and-accumulation-of-pre-5-8s-rrna-with-neuron-death-and-reactive-astrocytosis
#2
Nathan H Blewett, James R Iben, Sergei Gaidamakov, Richard J Maraia
Human La antigen (Sjögren's syndrome antigen B, SSB) is an abundant multifunctional RNA-binding protein. In the nucleoplasm, La binds to and protects from 3' exonucleases, the ends of precursor-tRNAs and other transcripts synthesized by RNA polymerase III, and facilitates their maturation, while a nucleolar isoform has been implicated in rRNA biogenesis by multiple independent lines of evidence. We showed earlier that conditional La knockout (La cKO) from mouse cortex neurons results in defective tRNA processing although pathway(s) involved in neuronal loss thereafter was unknown...
February 21, 2017: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/28220658/serological-evidence-for-exposure-to-avian-influenza-viruses-within-poultry-workers-in-southern-china
#3
E de Bruin, X Zhang, C Ke, R Sikkema, M Koopmans
The risk of infection with avian influenza viruses for poultry workers is relatively unknown in China, and study results are often biased by the notification of only the severe human cases. Protein microarray was used to detect binding antibodies to 13 different haemagglutinin (HA1-part) antigens of avian influenza A(H5N1), A(H7N7), A(H7N9) and A(H9N2) viruses, in serum samples from poultry workers and healthy blood donors collected in the course of 3 years in Guangdong Province, China. Significantly higher antibody titre levels were detected in poultry workers when compared to blood donors for the most recent H5 and H9 strains tested...
February 20, 2017: Zoonoses and Public Health
https://www.readbyqxmd.com/read/28219770/silencing-of-the-mrna-binding-protein-hur-increases-the-sensitivity-of-colorectal-cancer-cells-to-ionizing-radiation-through-upregulation-of-caspase-2
#4
Amel Badawi, Stephanie Hehlgans, Josef Pfeilschifter, Franz Rödel, Wolfgang Eberhardt
Increased abundance of the mRNA-binding protein human antigen R (HuR) is a characteristic feature of many cancers and frequently associated with a high grade malignancy and therapy resistance. HuR elicits a broad cell survival program mainly by stabilizing or increasing the translation of mRNAs coding for anti-apoptotic effector proteins. Conversally, we previously identified the pro-apoptotic caspase-2 as a novel HuR target which is mainly regulated at the level of translation. In this study, we investigated whether siRNA-mediated HuR knockdown interferes with cell survival and radiation sensitivity by monitoring apoptosis, DNA repair and three-dimensional (3D) clonogenic survival...
February 17, 2017: Cancer Letters
https://www.readbyqxmd.com/read/28216237/development-of-an-anti-ferret-cd4-monoclonal-antibody-for-the-characterisation-of-ferret-t-lymphocytes
#5
Daniel S Layton, Xiaowen Xiao, John D Bentley, Louis Lu, Cameron R Stewart, Andrew G D Bean, Timothy E Adams
The ferret is an established animal model for a number of human respiratory viral infections, such as influenza virus and more recently, Ebola virus. However, a paucity of immunological reagents has hampered the study of cellular immune responses. Here we describe the development and characterisation of a novel monoclonal antibody (mAb) against the ferret CD4 antigen and the characterisation of ferret CD4 T lymphocytes. Recombinant production and purification of the ferret CD4 ectodomain soluble protein allowed hybridoma generation and the generation of a mAb (FeCD4) showing strong binding to ferret CD4 protein and lymphoid cells by flow cytometry...
February 16, 2017: Journal of Immunological Methods
https://www.readbyqxmd.com/read/28215994/safe-recombinant-outer-membrane-vesicles-that-display-m2e-elicit-heterologous-influenza-protection
#6
Hannah C Watkins, C Garrett Rappazzo, Jaclyn S Higgins, Xiangjie Sun, Nicole Brock, Annie Chau, Aditya Misra, Joseph P B Cannizzo, Michael R King, Taronna R Maines, Cynthia A Leifer, Gary R Whittaker, Matthew P DeLisa, David Putnam
Recombinant, Escherichia coli-derived outer membrane vesicles (rOMVs), which display heterologous protein subunits, have potential as a vaccine adjuvant platform. One drawback to rOMVs is their lipopolysaccharide (LPS) content, limiting their translatability to the clinic due to potential adverse effects. Here, we explore a unique rOMV construct with structurally remodeled lipids containing only the lipid IVa portion of LPS, which does not stimulate human TLR4. The rOMVs are derived from a genetically engineered B strain of E...
February 16, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/28213939/protective-antibodies-against-clostridium-difficile-are-present-in-intravenous-immunoglobulin-and-are-retained-in-humans-following-its-administration
#7
Ola H Negm, Brendon MacKenzie, Mohamed R Hamed, Omar Aj Ahmad, Clifford C Shone, David P Humphreys, K Ravi Acharya, Christine E Loscher, Izabela Marszalowska, Mark Lynch, Mark H Wilcox, Tanya M Monaghan
The prevalence of serum antibodies against C. difficile (CD) toxins A and B in healthy populations have prompted interest in evaluating the therapeutic activity of intravenous immunoglobulin (IVIg) in individuals experiencing severe or recurrent C. difficile infection (CDI). Despite some promising case reports, a definitive clinical role for IVIg in CDI remains unclear. Contradictory results may be attributed to a lack of consensus regarding optimal dose, timing of administration and patient selection as well as variability in specific antibody content between commercial preparations...
February 18, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28209772/maternal-smoke-exposure-decreases-mesenchymal-proliferation-and-modulates-rho-gtpase-dependent-actin-cytoskeletal-signaling-in-fetal-lungs
#8
Uchenna Unachukwu, Jordis Trischler, Monica Goldklang, Rui Xiao, Jeanine D'Armiento
The present study tested the hypothesis that maternal smoke exposure results in fetal lung growth retardation due to dysregulation in various signaling pathways, including the Wnt (wingless-related integration site)/β-catenin pathway. Pregnant female C57BL/6J mice were exposed to cigarette smoke (100-150 mg/m(3)) or room air, and offspring were humanely killed on 12.5, 14.5, 16.5, and 18.5 d post coitum (dpc). We assessed lung stereology with Cavalieri estimation; apoptosis with proliferating cell nuclear antigen, TUNEL, and caspase assays; and gene expression with quantitative PCR (qPCR) and RNA sequencing on lung epithelium and mesenchyme retrieved by laser capture microdissection...
February 16, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28205451/sialylation-of-porphyromonas-gingivalis-lps-and-its-effect-on-bacterial-host-interactions
#9
Svetislav S Zaric, Mark J Lappin, Catherine R Fulton, Fionnuala T Lundy, Wilson A Coulter, Christopher R Irwin
Porphyromonas gingivalis produces different LPS isoforms with significant structural variations of their lipid A and O-antigen moieties that can affect its pro-inflammatory and bone-resorbing potential. We show here, for the first time, that P. gingivalis LPS isolated from W83 strain is highly sialylated and possesses significantly reduced inflammatory potential compared with less sialylated ATCC 33277 strain LPS. Nevertheless, the reduction in the endotoxin activity is not mediated by the presence of sialic acid LPS moieties as the sialic acid-free LPS produced by the mutant W83 strain exhibits a similar inflammatory potential to the wild type strain...
January 1, 2017: Innate Immunity
https://www.readbyqxmd.com/read/28202953/fully-human-cd19-specific-chimeric-antigen-receptors-for-t-cell-therapy
#10
D Sommermeyer, T Hill, S M Shamah, A I Salter, Y Chen, K M Mohler, S R Riddell
Impressive results have been achieved by adoptively transferring T-cells expressing CD19-specific CARs with binding domains from murine mAbs to treat B-cell malignancies. T-cell mediated immune responses specific for peptides from the murine scFv antigen-binding domain of the CAR can develop in patients and result in premature elimination of CAR-T-cells increasing the risk of tumor relapse. As fully human scFv might reduce immunogenicity, we generated CD19-specific human scFvs with similar binding characteristics as the murine FMC63-derived scFv using human Ab/DNA-libraries...
February 16, 2017: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/28202777/nodding-syndrome-may-be-an-autoimmune-reaction-to-the-parasitic-worm-onchocerca-volvulus
#11
Tory P Johnson, Richa Tyagi, Paul R Lee, Myoung-Hwa Lee, Kory R Johnson, Jeffrey Kowalak, Abdel Elkahloun, Marie Medynets, Alina Hategan, Joseph Kubofcik, James Sejvar, Jeffrey Ratto, Sudhir Bunga, Issa Makumbi, Jane R Aceng, Thomas B Nutman, Scott F Dowell, Avindra Nath
Nodding syndrome is an epileptic disorder of unknown etiology that occurs in children in East Africa. There is an epidemiological association with Onchocerca volvulus, the parasitic worm that causes onchocerciasis (river blindness), but there is limited evidence that the parasite itself is neuroinvasive. We hypothesized that nodding syndrome may be an autoimmune-mediated disease. Using protein chip methodology, we detected autoantibodies to leiomodin-1 more abundantly in patients with nodding syndrome compared to unaffected controls from the same village...
February 15, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28198767/anti-gal-and-anti-neu5gc-responses-in-nonimmunosuppressed-patients-following-treatment-with-rabbit-anti-thymocyte-polyclonal-iggs
#12
Apolline Salama, Gwénaëlle Evanno, Noha Lim, Juliette Rousse, Ludmilla Le Berre, Arnaud Nicot, Sophie Brouard, Kristina M Harris, Mario R Ehlers, Stephen E Gitelman, Jean-Paul Soulillou
BACKGROUND: Polyclonal anti-human thymocyte rabbit IgGs (anti-thymocyte globulin, ATG) are popular immunosuppressive drugs used to prevent or treat organ or bone-marrow allograft rejection, graft versus host disease, and autoimmune diseases. However, animal-derived glycoproteins are also strongly immunogenic and rabbit ATG induces serum sickness disease in almost all patients without additional immunosuppressive drugs, as seen in the START trial of ATG therapy in new-onset type 1 diabetes...
February 14, 2017: Transplantation
https://www.readbyqxmd.com/read/28197337/defective-t-cell-control-of-epstein-barr-virus-infection-in-multiple-sclerosis
#13
Michael P Pender, Peter A Csurhes, Jacqueline M Burrows, Scott R Burrows
Mounting evidence indicates that infection with Epstein-Barr virus (EBV) has a major role in the pathogenesis of multiple sclerosis (MS). Defective elimination of EBV-infected B cells by CD8(+) T cells might cause MS by allowing EBV-infected autoreactive B cells to accumulate in the brain. Here we undertake a comprehensive analysis of the T-cell response to EBV in MS, using flow cytometry and intracellular IFN-γ staining to measure T-cell responses to EBV-infected autologous lymphoblastoid cell lines and pools of human leukocyte antigen (HLA)-class-I-restricted peptides from EBV lytic or latent proteins and cytomegalovirus (CMV), in 95 patients and 56 EBV-seropositive healthy subjects...
January 2017: Clinical & Translational Immunology
https://www.readbyqxmd.com/read/28196594/inactivation-of-interferon-receptor-promotes-the-establishment-of-immune-privileged-tumor-microenvironment
#14
Kanstantsin V Katlinski, Jun Gui, Yuliya V Katlinskaya, Angelíca Ortiz, Riddhita Chakraborty, Sabyasachi Bhattacharya, Christopher J Carbone, Daniel P Beiting, Melanie A Girondo, Amy R Peck, Ellen Puré, Priya Chatterji, Anil K Rustgi, J Alan Diehl, Constantinos Koumenis, Hallgeir Rui, Serge Y Fuchs
Refractoriness of solid tumors, including colorectal cancers (CRCs), to immunotherapies is attributed to the immunosuppressive tumor microenvironment that protects malignant cells from cytotoxic T lymphocytes (CTLs). We found that downregulation of the type I interferon receptor chain IFNAR1 occurs in human CRC and mouse models of CRC. Downregulation of IFNAR1 in tumor stroma stimulated CRC development and growth, played a key role in formation of the immune-privileged niche, and predicted poor prognosis in human CRC patients...
February 13, 2017: Cancer Cell
https://www.readbyqxmd.com/read/28193504/strong-anti-epstein-barr-virus-ebv-or-cytomegalovirus-cmv-cellular-immune-responses-predict-survival-and-a-favourable-response-to-anti-tuberculosis-therapy
#15
REVIEW
Tumaini Nagu, Said Aboud, Martin Rao, Mecky Matee, Rebecca Axelsson, Davide Valentini, Ferdinand Mugusi, Alimuddin Zumla, Markus Maeurer
BACKGROUND: Intact immune responses to cytomegalovirus (CMV) and Epstein-Barr virus (EBV) represent a biologically and clinically relevant correlate of 'immunological fitness' in humans. However, there is a lack of knowledge concerning anti-EBV or anti-CMV responses in patients with pulmonary tuberculosis (TB), in whom aberrant immune responses may promote progression of clinical disease. METHODS: Venous blood samples were obtained at the time of (sputum smear positive) pulmonary TB diagnosis...
February 11, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28187738/naturally-occurring-anti-glycan-antibodies-binding-to-globo-h-expressing-cells-identify-ovarian-cancer-patients
#16
Tatiana Pochechueva, Shahidul Alam, Andreas Schötzau, Alexander Chinarev, Nicolai V Bovin, Neville F Hacker, Francis Jacob, Viola Heinzelmann-Schwarz
BACKGROUND: Glycosphingolipids are important compounds of the plasma membrane of mammalian cells and a number of them have been associated with malignant transformation and progression, reinforcing tumour aggressiveness and metastasis. Here we investigated the levels of naturally occurring anti-glycan antibodies to Globo H in blood plasma obtained from high-grade serous ovarian cancer patients (SOC) and women without gynaecological malignancies (control) using suspension glycan array technology employing chemically synthesized glycans as antibody targets...
February 10, 2017: Journal of Ovarian Research
https://www.readbyqxmd.com/read/28183721/carbamylation-of-vimentin-is-inducible-by-smoking-and-represents-an-independent-autoantigen-in-rheumatoid-arthritis
#17
Caroline Ospelt, Holger Bang, Eugen Feist, Giovanni Camici, Stephan Keller, Jacqueline Detert, Anette Krämer, Steffen Gay, Khetam Ghannam, Gerd R Burmester
OBJECTIVES: Smoking has been connected to citrullination of antigens and formation of anti-citrullinated peptide antibodies (ACPAs) in rheumatoid arthritis (RA). Since smoking can modify proteins by carbamylation (formation of homocitrulline), this study was conducted to investigate these effects on vimentin in animal models and RA. METHODS: The efficiency of enzymatic carbamylation of vimentin was characterised. B-cell response was investigated after immunisation of rabbits with different vimentin isoforms...
February 9, 2017: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/28181421/complete-genome-sequence-of-a-novel-influenza-a-h1n2-virus-circulating-in-swine-from-central-bajio-region-mexico
#18
J I Sánchez-Betancourt, J B Cervantes-Torres, M Saavedra-Montañez, R A Segura-Velázquez
The aim of this study was to perform the complete genome sequence of a swine influenza A H1N2 virus strain isolated from a pig in Guanajuato, México (A/swine/Mexico/GtoDMZC01/2014) and to report its seroprevalence in 86 counties at the Central Bajio zone. To understand the evolutionary dynamics of the isolate, we undertook a phylogenetic analysis of the eight gene segments. These data revealed that the isolated virus is a reassortant H1N2 subtype, as its genes are derived from human (HA, NP, PA) and swine (M, NA, PB1, PB2 and NS) influenza viruses...
February 8, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/28179581/melatonin-attenuates-angiotensin-ii-induced-abdominal-aortic-aneurysm-through-the-down-regulation-of-matrix-metalloproteinases
#19
Jing Kong, Ya Zhang, Shanshan Liu, Hongxuan Li, Shangming Liu, Jingjing Wang, Xiaoteng Qin, Xiuxin Jiang, Jianmin Yang, Cheng Zhang, Wencheng Zhang
Abdominal aortic aneurysm (AAA) affects more than 5% of the population in developed countries and the pharmacotherapies for AAA are limited. Here, we explored whether melatonin regulates the development of AAA. In smooth muscle cells, melatonin treatment decreases angiotensin II-induced matrix metalloproteinase 2 (MMP2) and MMP9 expression. Human antigen R (HuR) could bind with the adenylateuridylate-rich elements of MMP2 and MMP9 mRNAs 3' untranslated region, resulting in the increased stability of MMP2 and MMP9 mRNAs...
February 4, 2017: Oncotarget
https://www.readbyqxmd.com/read/28167670/salmonella-typhi-lipopolysaccharide-o-antigen-modifications-impact-on-serum-resistance-and-antibody-recognition
#20
Erica Kintz, Christian Heiss, Ian Black, Nicholas Donohue, Naj Brown, Mark R Davies, Parastoo Azadi, Stephen Baker, Paul M Kaye, Marjan van der Woude
Salmonella Typhi is a human restricted Gram-negative bacterial pathogen, responsible for causing an estimated 27 million cases of typhoid fever annually leading to 217,000 deaths, and current vaccines do not offer full protection. The O-antigen side chain of the lipopolysaccharide is an immunodominant antigen, can define host-pathogen interactions, and is under consideration as a vaccine target for some Gram-negative species. The composition of the O-antigen can be modified by activity of glycosyltransferase (gtr) operons acquired by horizontal gene transfer...
February 6, 2017: Infection and Immunity
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