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https://www.readbyqxmd.com/read/28350867/dissociation-between-skin-test-reactivity-and-anti-aeroallergen-ige-determinants-among-urban-brazilian-children
#1
Neuza M Alcantara-Neves, Rafael V Veiga, João C M Ponte, Sérgio S da Cunha, Silvia M Simões, Álvaro A Cruz, Maria Yazdanbakhsh, Sheila M Matos, Thiago Magalhães Silva, Camila A Figueiredo, Lain C Pontes-de-Carvalho, Laura C Rodrigues, Rosemeire L Fiaccone, Philip J Cooper, Maurício L Barreto
BACKGROUND: The dissociation between specific IgE and skin prick test reactivity to aeroallergens, a common finding in populations living in low and middle-income countries, has important implications for the diagnosis and treatment of allergic diseases. Few studies have investigated the determinants of this dissociation. In the present study, we explored potential factors explaining this dissociation in children living in an urban area of Northeast Brazil, focusing in particular on factors associated with poor hygiene...
2017: PloS One
https://www.readbyqxmd.com/read/28350799/optimization-and-evaluation-of-astragalus-polysaccharide-injectable-thermoresponsive-in-situ-gels
#2
Zugong Yu, Fanxi Guo, Yangyang Guo, Zhenrui Zhang, Feng Wu, Xiaoqing Luo
The objective of this study was to develop an injectable in situ forming gel system based on Poloxamer for sustained release of Astragalus polysaccharide (APS), thus achieved once or twice administration instead of frequent dosing during long-term treatment. The optimal formulation is 10 g APS, 18 g poloxamer 407, 2 g poloxamer 188, 0.15 g CMC-Na, 0.85 g sodium chloride in 100 ml gel in situ which had a preferable sol-gel transition temperature(T sol-gel) (34.1 ± 0.4°C), and good stability. In vitro release studies, all formulations containing polymer additives had prolonged release time and decreased initial burst to some extent...
2017: PloS One
https://www.readbyqxmd.com/read/28346102/phage-display-derived-ligand-for-mucosal-transcytotic-receptor-gp-2-promotes-antigen-delivery-to-m-cells-and-induces-antigen-specific-immune-response
#3
Inam Ullah Khan, Jiansheng Huang, Rui Liu, Jingbo Wang, Jun Xie, Naishuo Zhu
Successful oral immunization depends on efficient delivery of antigens (Ags) to the mucosal immune induction site. Glycoprotein-2 (GP-2) is an integral membrane protein that is expressed specifically on M cells within follicle-associated epithelium (FAE) and serves as transcytotic receptor for luminal Ags. In this study, we selected peptide ligands against recombinant human GP-2 by screening a phage display library and evaluated their interaction with GP-2 in vitro and ex vivo. Selected peptides were conjugated to the C-terminal of enhanced green fluorescence protein (EGFP) and evaluated for their ability to induce an immune response in mice...
February 1, 2017: SLAS Discov
https://www.readbyqxmd.com/read/28345880/detecting-proteins-glycosylation-by-a-homogeneous-reaction-system-with-zwitterionic-gold-nanoclusters
#4
Jinan Li, Jing Liu, Zheyi Liu, Yuan Tan, Xiaoyan Liu, Fangjun Wang
Homogeneous gold nanoclusters (Au NCs) have been widely utilized in drug delivery, chemical sensing, bioassays and bio-labeling due to their unique physical and chemical properties. However, little attention has been paid to their application in detecting protein post-translational modifications. Herein, we describe development of a homogeneous reaction system with water-soluble zwitterionic Au NCs to capture glycopeptides from complex biological samples. The unique characteristics of Au NCs, such as their molecular-like properties, the excellent homogeneity in aqueous solution, the organic solvent respon-sive precipitation, and the easy preparation in only 4...
March 27, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28345718/probing-the-binding-affinity-of-plasma-proteins-adsorbed-on-au-nanoparticles
#5
Xiaoning Zhang, Junting Zhang, Fan Zhang, Shaoning Yu
Nanoparticle (NP) surfaces are modified immediately by the adsorption of proteins when exposed to human blood, leading to the formation of a protein corona. The adsorption of serum proteins is the key process for exploring the bioapplication and biosafety of NPs. In this study, NP-protein binding affinity (Ka) was investigated. Some serum proteins, such as human serum albumin (HSA), trypsin (TRP), hemoglobin (Hb), myoglobin (MB), immunoglobulin G (IgG), carbonic anhydrase (CA), fibrinogen (FIB), chymotrypsin and r-globulin, were used with gold nanoparticles (AuNPs) to address binding affinity according to isothermal titration calorimetry (ITC) combined with dynamic light scattering (DLS) and fluorescence quenching...
March 27, 2017: Nanoscale
https://www.readbyqxmd.com/read/28345437/clinical-profile-dosing-and-quality-of-life-outcomes-in-primary-immune-deficiency-patients-treated-at-home-with-immunoglobulin-g-data-from-the-ideal-patient-registry
#6
Sean Kearns, Loretta Kristofek, William Bolgar, Luqman Seidu, Samantha Kile
BACKGROUND: Patients with primary immune deficiency (PID) often require immunoglobulin G (IgG, commonly referred to as Ig) replacement therapy to prevent infections and associated comorbidities. Ig therapy can be given either through intravenous or subcutaneous routes, and both can be done in the home setting. There is limited information available on the real-world diagnosis, management, and outcomes of this patient population, given the variable disease presentation and treatment options...
April 2017: Journal of Managed Care & Specialty Pharmacy
https://www.readbyqxmd.com/read/28345289/severe-bleeding-diatheses-in-an-elderly-patient-with-combined-type-autoantibody-against-factor-xiii-a-subunit-novel-approach-to-the-diagnosis-and-classification-of-anti-factor-xiii-antibodies
#7
M Kun, N Szuber, É Katona, K Pénzes, A Bonnefoy, B Bécsi, F Erdődi, G E Rivard, L Muszbek
INTRODUCTION: Acquired factor XIII (FXIII) deficiency due to autoantibody is a rare, severe bleeding diathesis. Its laboratory diagnosis and classification represents a difficult task. AIM: Introduction of novel approaches into the diagnosis and characterization of anti-FXIII autoantibody and demonstration of their use in the diagnosis of a patient with autoimmune FXIII deficiency. METHODS: Factor XIII activity, FXIII antigen levels and the titre of anti-FXIII-A antibody were monitored throughout the course of the disease...
March 26, 2017: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/28345001/effective-depletion-of-pre-existing-anti-aav-antibodies-requires-broad-immune-targeting
#8
Victoria M Velazquez, Aaron S Meadows, Ricardo J Pineda, Marybeth Camboni, Douglas M McCarty, Haiyan Fu
Pre-existing antibodies (Abs) to AAV pose a critical challenge for the translation of gene therapies. No effective approach is available to overcome pre-existing Abs. Given the complexity of Ab production, overcoming pre-existing Abs will require broad immune targeting. We generated a mouse model of pre-existing AAV9 Abs to test multiple immunosuppressants, including bortezomib, rapamycin, and prednisolone, individually or in combination. We identified an effective approach combining rapamycin and prednisolone, reducing serum AAV9 Abs by 70%-80% at 4 weeks and 85%-93% at 8 weeks of treatment...
March 17, 2017: Molecular Therapy. Methods & Clinical Development
https://www.readbyqxmd.com/read/28344991/antibody-directed-glucocorticoid-targeting-to-cd163-in-m2-type-macrophages-attenuates-fructose-induced-liver-inflammatory-changes
#9
Pia Svendsen, Jonas H Graversen, Anders Etzerodt, Henrik Hager, Rasmus Røge, Henning Grønbæk, Erik I Christensen, Holger J Møller, Hendrik Vilstrup, Søren K Moestrup
Increased consumption of high-caloric carbohydrates contributes substantially to endemic non-alcoholic fatty liver disease in humans, covering a histological spectrum from fatty liver to steatohepatitis. Hypercaloric intake and lipogenetic effects of fructose and endotoxin-driven activation of liver macrophages are suggested to be essential to disease progression. In the present study, we show that a low dose of an anti-CD163-IgG-dexamethasone conjugate targeting the hemoglobin scavenger receptor CD163 in Kupffer cells and other M2-type macrophages has a profound effect on liver inflammatory changes in rats on a high-fructose diet...
March 17, 2017: Molecular Therapy. Methods & Clinical Development
https://www.readbyqxmd.com/read/28344163/characterization-of-antibody-response-in-neuroinvasive-infection-caused-by-toscana-virus
#10
Anna Pierro, Sabrina Ficarelli, Nazli Ayhan, Silvia Morini, Luigi Raumer, Michele Bartoletti, Antonio Mastroianni, Francesca Prati, Simona Schivazappa, Patrizia Cenni, Caterina Vocale, Giada Rossini, Paolo Gaibani, Vittorio Sambri, Maria Paola Landini, Russel Edward Lewis, Remi N Charrel, Stefania Varani
OBJECTIVES: Among sandfly-borne pathogens, Toscana virus (TOSV) is a prominent cause of summer meningitis in Mediterranean Europe. Here, we assessed the kinetics of anti-TOSV antibodies over time in 41 patients diagnosed with TOSV-meningitis or meningoencephalitis in North-eastern Italy. METHODS: Acute and follow-up serum samples were collected up to 20 months after diagnosis of TOSV infection and tested for the presence of specific antibody using immunoenzymatic and indirect immunofluorescence assays...
March 23, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28343781/sublingual-targeting-of-sting-with-3-3-cgamp-promotes-systemic-and-mucosal-immunity-against-anthrax-toxins
#11
Tara L Martin, Junbae Jee, Eunsoo Kim, Haley E Steiner, Estelle Cormet-Boyaka, Prosper N Boyaka
Anthrax is caused by Bacillus anthracis, a zoonotic bacterial pathogen affecting humans and livestock worldwide. The current human anthrax vaccine, anthrax vaccine adsorbed (AVA), is an injected vaccine with a cumbersome administration schedule and fails to promote mucosal immunity. Bacterial enterotoxins, which stimulate production of the cyclic nucleotide cAMP are effective experimental mucosal vaccine adjuvants, but their inherent toxicity has precluded their use in humans. We investigated whether cyclic dinucleotides that target Stimulator of Interferon Gamma Genes (STING) in mammalian cells could represent an alternative to bacterial enterotoxins as adjuvant for sublingual immunization and promotion of mucosal immunity and secretory IgA responses in addition to systemic immunity...
March 23, 2017: Vaccine
https://www.readbyqxmd.com/read/28343289/the-effect-of-mucin-fibrinogen-and-igg-on-the-corrosion-behaviour-of-ni-ti-alloy-and-stainless-steel
#12
Zhang Chao, Xiao Yaomu, Liu Chufeng, Liu Conghua
In this study, Ni-Ti alloy and stainless steal were exposed to artificial saliva containing fibrinogen, IgG or mucin, and the resultant corrosion behavior was studied. The purpose was to determine the mechanisms by which different types of protein contribute to corrosion. The effect of different proteins on the electrochemical resistance of Ni-Ti and SS was tested by potentiodynamic polarization, and the repair capacity of passivation film was tested by cyclic polarization measurements. The dissolved corrosion products were determined by ICP-OES, and the surface was analyzed by SEM and AFM...
March 25, 2017: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
https://www.readbyqxmd.com/read/28343172/novel-immunoassays-for-detection-of-cuzd1-autoantibodies-in-serum-of-patients-with-inflammatory-bowel-diseases
#13
Sofia Farkona, Antoninus Soosaipillai, Panagiota Filippou, Christos Liaskos, Dimitrios P Bogdanos, Eleftherios P Diamandis, Ivan M Blasutig
BACKGROUND: Pancreatic autoantibodies (PABs) are detected in patients with inflammatory bowel disease (IBD). Their prevalence is higher in Crohn's disease (CrD) than in ulcerative colitis (UC). Glycoprotein 2 (GP2) and, more recently, CUB and zona pellucida-like domain-containing protein 1 (CUZD1) have been identified as target autoantigens of PAB. The clinical utility of CUZD1 autoantibodies has only recently been assessed by indirect immunofluorescence (IIF) assays. In this study, we developed and validated novel immunoassays for the detection of CUZD1 autoantibodies...
March 27, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28343107/phosphorylated-tyrosine-based-pseudobioaffinity-adsorbent-for-the-purification-of-immunoglobulin-g
#14
Gisele Luiza Pavan, Igor Tadeu Lazzarotto Bresolin, Angélica Grespan, Sonia Maria Alves Bueno
The present study evaluated the phosphorylated-tyrosine (P-Tyr) based pseudobioaffinity adsorbent for the purification of human immunoglobulin G (IgG). P-Tyr was selected as a ligand to mimic the natural interactions that occur between the immunoreceptor tyrosine-based activation motif and the IgG. The ligand was coupled to bisoxirane-activated agarose gel and the effect of buffer system, pH, and conductivity was performed to elucidate the nature of IgG-P-Tyr interactions. P-Tyr-agarose was able to purify IgG from human plasma solution in HEPES buffer at pH 7...
March 21, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28343106/a-structure-based-plasma-protein-pre-fractionation-using-conjoint-immobilized-metal-chelate-affinity-ima-system
#15
Karan Karkra, Kishore K R Tetala, M A Vijayalakshmi
The potential of immobilized metal/chelate affinity (IMA) in a continuous fashion, referred as conjoint approach, to pre-fractionate plasma proteins (in their native state) prior to LC-MS analysis was investigated in this study. Four transition metal-ions (Co (II), Zn (II), Ni (II) and Cu (II)) were individually chelated with IDA (iminodiacetic acid) coated CIM (Convective Interaction Media) disks and placed in a single housing in the following sequential order: IDA-Co (II)→IDA-Zn (II)→IDA-Ni (II)→IDA-Cu (II)...
March 10, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28342665/recombinant-newcastle-disease-virus-expressing-the-infectious-bronchitis-virus-s1-gene-protects-chickens-against-newcastle-disease-virus-and-infectious-bronchitis-virus-challenge
#16
Ran Zhao, Junfeng Sun, Tianming Qi, Wen Zhao, Zongxi Han, Xiaopu Yang, Shengwang Liu
The recombinant LaSota strain expressing a chimeric IBV S1 gene (rLaSota-S1) was constructed with the S1 gene of the LX4 type IBV ck/CH/LDL/091022. The expression of the S1 protein was detected by an indirect immunofluorescence assay and Western blotting. The rLaSota-S1 strain was slightly attenuated, and its growth dynamics were similar to that of the parental LaSota strain. Vaccination of specific pathogen-free chickens with the rLaSota-S1 strain induced NDV hemagglutination inhibition antibodies, and it protected chickens from challenge with virulent NDV...
March 22, 2017: Vaccine
https://www.readbyqxmd.com/read/28342316/comparison-of-cytomegalovirus-cmv-specific-neutralization-capacity-of-hyperimmunoglobulin-hig-versus-standard-intravenous-immunoglobulin-ivig-preparations-impact-of-cmv-igg-normalization
#17
Matthias Stefan Schampera, Katrin Schweinzer, Harald Abele, Karl Oliver Kagan, Reinhild Klein, Ingo Rettig, Gerhard Jahn, Klaus Hamprecht
BACKGROUND: Based on a non-randomized study of Nigro et al. (2005) the intravenous administration of hyperimmunoglobulins (HIGs) is applied frequently to women with primary CMV-infection as "off-label use" in Germany. OBJECTIVES: In order to describe their CMV-specific neutralization-capacity in vitro, we analyzed the HIG preparations Cytotect(®), and Cytogam(®) as well as the standard intravenous immunoglobulins (IVIG) Octagam(®), Gamunex(®), Kiovig(®). STUDY DESIGN: We performed short-term cell-free CMV neutralization assays (CFNT) and long-term cell-adapted neutralization-plaque-reduction assays (PRANT)...
March 16, 2017: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/28341999/immunological-memory-to-hyperphosphorylated-tau-in-asymptomatic-individuals
#18
Gabriel Pascual, Jehangir S Wadia, Xueyong Zhu, Elissa Keogh, Başak Kükrer, Jeroen van Ameijde, Hanna Inganäs, Berdien Siregar, Gerrard Perdok, Otto Diefenbach, Tariq Nahar, Imke Sprengers, Martin H Koldijk, Els C Brinkman-van der Linden, Laura A Peferoen, Heng Zhang, Wenli Yu, Xinyi Li, Michelle Wagner, Veronica Moreno, Julie Kim, Martha Costa, Kiana West, Zara Fulton, Lucy Chammas, Nancy Luckashenak, Lauren Fletcher, Trevin Holland, Carrie Arnold, R Anthony Williamson, Jeroen J Hoozemans, Adrian Apetri, Frederique Bard, Ian A Wilson, Wouter Koudstaal, Jaap Goudsmit
Several reports have described the presence of antibodies against Alzheimer's disease-associated hyperphosphorylated forms of tau in serum of healthy individuals. To characterize the specificities that can be found, we interrogated peripheral IgG(+) memory B cells from asymptomatic blood donors for reactivity to a panel of phosphorylated tau peptides using a single-cell screening assay. Antibody sequences were recovered, cloned, and expressed as full-length IgGs. In total, 52 somatically mutated tau-binding antibodies were identified, corresponding to 35 unique clonal families...
March 24, 2017: Acta Neuropathologica
https://www.readbyqxmd.com/read/28341873/exploring-the-plasmatic-platelet-activating-factor-acetylhydrolase-activity-in-patients-with-anti-phospholipid-antibodies
#19
Martina Fabris, Adriana Cifù, Cinzia Pistis, Massimo Siega-Ducaton, Desrè Ethel Fontana, Roberta Giacomello, Elio Tonutti, Francesco Curcio
PURPOSE: To explore the role of plasmatic platelet-activating factor acetylhydrolase (PAF-AH), a marker of cardiovascular risk, in patients with anti-phospholipid antibodies (aPL). METHODS: PAF-AH activity was assessed in a series of 167 unselected patients screened for aPL in a context of thrombotic events, risk of thrombosis or obstetric complications and in 77 blood donors. RESULTS: 116/167 patients showed positive results for at least one aPL among IgG/IgM anti-prothrombin/phosphatidylserine (aPS/PT), anti-cardiolipin (aCL), anti-beta2-glycoprotein I (aβ2GPI) or lupus anticoagulant (LAC), while 51/167 patients resulted aPL-negative...
December 2017: Auto- Immunity Highlights
https://www.readbyqxmd.com/read/28341551/augmenting-the-cytotoxicity-of-oleic-acid-protein-complexes-potential-of-target-specific-antibodies
#20
Mehboob Hoque, Jyoti Gupta, M Saleemuddin
HAMLET (Human Alpha-Lactalbumin Made LEthal to Tumor cells), a complex of oleic acid (OA) with partially unfolded human α-lactalbumin, shows remarkable toxicity towards a spectrum of tumor cells as well as few differentiated cells including mammalian erythrocytes. Human erythrocytes, for this reason, have been used as convenient model cells to study toxic properties of the OA complexes. The toxicity of HAMLET-like complexes, prepared using immunoglobulin gamma (IgG) isolated from the sera of rabbits immunized with human erythrocytes as well as those unimmunized, towards the red cells was investigated...
March 21, 2017: Biochimie
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