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https://www.readbyqxmd.com/read/28102464/a-phase-i-and-pharmacokinetic-study-of-afilbercept-with-folfiri-comparison-of-chinese-and-caucasian-populations
#1
Jianming Xu, Yingxin Li, Xing Sun, Dongsheng Zhang, Rongrui Liu, Samira Ziti-Ljajic, Dongmei Shi, Fengying Xue, Nathalie Le Bail, Ruihua Xu
Background This study assessed the preliminary safety, pharmacokinetics (PK) and anti-tumor effects of aflibercept in combination with 5-fluorouracil, leucovorin and irinotecan (FOLFIRI) in Chinese patients with previously-treated advanced solid malignancies. Patients and Methods This open-label single-arm Phase I study conducted at two centers in China included adult (≥18 years) patients with metastatic or unresectable solid malignancies who had received ≥1 prior treatment. Patients received aflibercept 4 mg/kg IV on Day 1 followed by FOLFIRI over Days 1 and 2 every 2 weeks, and were assessed for safety, tumor response, PK parameters and immunogenicity...
January 19, 2017: Investigational New Drugs
https://www.readbyqxmd.com/read/28101401/human-heart-failure-biomarker-immunosensor-based-on-excessively-tilted-fiber-gratings
#2
Binbin Luo, Shengxi Wu, Zhonghao Zhang, Wengen Zou, Shenghui Shi, Mingfu Zhao, Nianbing Zhong, Yong Liu, Xue Zou, Lingling Wang, Weina Chai, Chuanmin Hu, Lin Zhang
A label-free immunosensor platform based on excessively tilted fiber gratings (Ex-TFGs) was developed for highly specific and fast detection of human N-terminal pro-B-type natriuretic peptide (NT-proBNP), which is considered a powerful biomarker for prognosis and risk stratification of heart failure (HF). High-purity anti-NT-proBNP monoclonal antibodies (MAbs) prepared in our laboratory were immobilized on fiber surface through the staphylococcal protein A (SPA) method for subsequent specific binding of the targeted NT-proBNP...
January 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28099816/new-treatment-options-and-emerging-drugs-for-axial-spondyloarthritis-biological-and-targeted-synthetic-agents
#3
Eric Toussirot
Ankylosing spondylitis (AS) and axial spondyloarthritis (ax SpA) are chronic inflammatory diseases mainly involving the axial skeleton. Pharmacological treatments for AS and ax SpA usually include local glucocorticoid injections, NSAIDs and anti-TNFa agents. Since around 30% to 40% of patients are non responders or intolerant to anti-TNFa agents, we need new therapeutic options for AS and ax SpA. Areas covered: This review describes the new biological agents that can be used or are in development for AS or ax SpA as well as emerging synthetic targeted drugs...
January 18, 2017: Expert Opinion on Pharmacotherapy
https://www.readbyqxmd.com/read/28098973/electrochemiluminescence-detection-of-escherichia-coli-o157-h7-based-on-a-novel-polydopamine-surface-imprinted-polymer-biosensor
#4
Shufan Chen, Xueqian Chen, Lijuan Zhang, Juanjuan Gao, Qiang Ma
In this paper, a facilely prepared electrochemiluminescence (ECL) biosensor was developed for Escherichia coli (E. coli) O157:H7 quantitative detection based on polydopamine (PDA) surface imprinted polymer (SIP) and nitrogen-doped graphene quantum dots (N-GQDs). N-GQDs with a high quantum yield of 43.2% were synthesized. The uniform PDA SIP film for E. coli O157:H7 was established successfully with a facile route. The dopamine and E. coli O157:H7 were mixed and electropolymerized directly on the electrode. After removed E...
January 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28096941/transport-of-biomolecules-to-binding-partners-displayed-on-the-surface-of-microbeads-arrayed-in-traps-in-a-microfluidic-cell
#5
Xiaoxiao Chen, Thomas F Leary, Charles Maldarelli
Arrays of probe molecules integrated into a microfluidic cell are utilized as analytical tools to screen the binding interactions of the displayed probes against a target molecule. These assay platforms are useful in enzyme or antibody discovery, clinical diagnostics, and biosensing, as their ultraminiaturized design allows for high sensitivity and reduced consumption of reagents and target. We study here a platform in which the probes are first grafted to microbeads which are then arrayed in the microfluidic cell by capture in a trapping course...
January 2017: Biomicrofluidics
https://www.readbyqxmd.com/read/28094996/characterization-of-protein-excipient-microheterogeneity-in-biopharmaceutical-solid-state-formulations-by-confocal-fluorescence-microscopy
#6
Stijn H S Koshari, Jean L Ross, Purnendu K Nayak, Isidro E Zarraga, Karthikan Rajagopal, Norman J Wagner, Abraham M Lenhoff
Protein-stabilizer microheterogeneity is believed to influence long-term protein stability in solid-state biopharmaceutical formulations and its characterization is therefore essential for the rational design of stable formulations. However, the spatial distribution of the protein and the stabilizer in a solid-state formulation is, in general, difficult to characterize because of the lack of a functional, simple, and reliable characterization technique. We demonstrate the use of confocal fluorescence microscopy with fluorescently labeled monoclonal antibodies (mAbs) and antibody fragments (Fabs) to directly visualize three-dimensional particle morphologies and protein distributions in dried biopharmaceutical formulations, without restrictions on processing conditions or the need for extensive data analysis...
January 17, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28094469/immunohistochemical-assessment-of-glucagon-like-peptide-1-receptor-glp-1r-expression-in-the-pancreas-of-patients-with-type-2-diabetes
#7
Rikke Kaae Kirk, Charles Pyke, Matthias G von Herrath, Jane Preuss Hasselby, Lars Pedersen, Pia Gottrup Mortensen, Lotte Bjerre Knudsen, Ken Coppieters
Glucagon-like peptide-1 (GLP-1) is an incretin hormone which stimulates insulin release and inhibits glucagon secretion from the pancreas in a glucose-dependent manner. Incretin-based therapies, consisting of GLP-1 receptor (GLP-1R) agonists and dipeptidyl peptidase-4 (DPP-4) inhibitors, are used for the treatment of T2D. Immunohistochemical studies for GLP-1R expression have previously been hampered by the use of unspecific polyclonal antibodies. This study used a new monoclonal antibody to assess GLP-1R expression in pancreatic tissue from 23 patients with T2D, including 7 with a DPP-4 inhibitor and 1 with a GLP-1R agonist treatment history...
January 17, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/28093664/cell-proliferation-and-differentiation-during-the-three-dimensional-reconstitution-of-eccrine-sweat-glands
#8
Xuexue Li, Haihong Li, Mingjun Zhang, Liyun Chen, Bingna Zhang
The aim of this study is to characterize the cell proliferation and proliferating cell types during three-dimensional reconstitution of eccrine sweat glands. Eccrine sweat gland cells suspended in Matrigel were injected subcutaneously into the inguinal regions of nude mice. At 1, 2, 4, 6, 8, 14, 21, 28, 35 and 42 days post-implantation, Matrigel plugs were immunostained for Ki67, to detect cycling cells, and the Ki67 labeling index at different time points was calculated. Three pairs of antibodies, Ki67/K7, Ki67/K14 and Ki67/α-SMA, were used to identify proliferating cell types in the plugs, on days 28, 35 and 42, by immunofluorescence double staining...
January 16, 2017: Journal of Molecular Histology
https://www.readbyqxmd.com/read/28092949/label-free-separation-of-induced-pluripotent-stem-cells-with-anti-ssea-1-antibody-immobilized-microfluidic-channel
#9
Akihisa Otaka, Kazuki Kitagawa, Takahiko Nakaoki, Mitsuhi Hirata, Kyoko Fukazawa, Kazuhiko Ishihara, Atsushi Mahara, Tetsuji Yamaoka
When induced pluripotent stem cell (iPSC) is routinely cultured, the obtained cells are a heterogeneous mixture, including feeder cells and partially differentiated cells. Therefore, a purification process is required to use them in a clinical stage. We described a label-free separation of iPSCs using a microfluidic channel. Antibodies against stage-specific embryonic antigen 1 (SSEA-1) was covalently immobilized on the channel coated with a phospholipid polymer. After injection of the heterogeneous cell suspension containing iPSCs, the velocity of cell movement under a liquid flow condition was measured...
January 16, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28092049/rosette-assay-highly-customizable-dot-blot-for-sh2-domain-screening
#10
Khong Y Ng, Kazuya Machida
With a growing number of high-throughput studies, structural analyses, and availability of protein-protein interaction databases, it is now possible to apply web-based prediction tools to SH2 domain-interactions. However, in silico prediction is not always reliable and requires experimental validation. Rosette assay is a dot blot-based reverse-phase assay developed for the assessment of binding between SH2 domains and their ligands. It is conveniently customizable, allowing for low- to high-throughput analysis of interactions between various numbers of SH2 domains and their ligands, e...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28092047/analysis-of-the-global-changes-in-sh2-binding-properties-using-mass-spectrometry-supported-by-quantitative-stable-isotope-labeling-by-amino-acids-in-cell-culture-silac-technique
#11
Radoslaw M Sobota
Quantitative mass spectrometry (MS)-based proteomics enables fast and reliable analysis of protein complexes. Its robustness and sensitivity effectively substitute traditional antibody-based approaches. Here, we describe the combination of mass spectrometry and Stable Isotope Labeling by Amino acids in Cell culture (SILAC) in characterization of the SH2 domain binding capacity.
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28091627/development-of-a-single-step-immunoassay-microdevice-based-on-a-graphene-oxide-containing-hydrogel-possessing-fluorescence-quenching-and-size-separation-functions
#12
Akihiro Shirai, Kaho Nakashima, Kenji Sueyoshi, Tatsuro Endo, Hideaki Hisamoto
An immunoassay, which is an indispensable analytical method both in biological research and in medical fields was successfully integrated into a "single-step" by developing a microdevice composed of a graphene oxide (GO)-containing hydrogel and a poly (dimethylsiloxane) (PDMS) microchannel array with a polyethylene glycol (PEG) coating containing a fluorescently-labelled antibody. Here we used 2-hydroxyethylmethacrylate (HEMA) as a monomer that is easily, and homogeneously, mixed with GO to synthesize the hydrogel...
January 16, 2017: Analyst
https://www.readbyqxmd.com/read/28090798/switching-from-branded-to-generic-glatiramer-acetate-15-month-gate-trial-extension-results
#13
Krzysztof Selmaj, Frederik Barkhof, Anna N Belova, Christian Wolf, Evelyn Rw van den Tweel, Janine Jl Oberyé, Roel Mulder, David F Egging, Norbert P Koper, Jeffrey A Cohen
BACKGROUND: Open-label 15-month follow-up of the double-blind, placebo-controlled Glatiramer Acetate clinical Trial to assess Equivalence with Copaxone(®) (GATE) trial. OBJECTIVE: To evaluate efficacy, safety, and tolerability of prolonged generic glatiramer acetate (GTR) treatment and to evaluate efficacy, safety, and tolerability of switching from brand glatiramer acetate (GA) to GTR treatment. METHODS: A total of 729 patients received GTR 20 mg/mL daily...
January 1, 2017: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/28089853/region-specific-increases-in-fosb-%C3%AE-fosb-immunoreactivity-in-the-rat-brain-in-response-to-chronic-sleep-restriction
#14
Shannon Hall, Samüel Deurveilher, Kristin Robin Ko, Joan Burns, Kazue Semba
Using a rat model of chronic sleep restriction (CSR) featuring periodic sleep deprivation with slowly rotating wheels (3h on/1h off), we previously observed that 99h of this protocol induced both homeostatic and allostatic (adaptive) changes in physiological and behavioural measures. Notably, the initial changes in sleep intensity and attention performance gradually adapted during CSR despite accumulating sleep loss. To identify brain regions involved in these responses, we used FosB/ΔFosB immunohistochemistry as a marker of chronic neuronal activation...
January 12, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28088490/microwave-based-treatments-of-wheat-kernels-do-not-abolish-gluten-epitopes-implicated-in-celiac-disease
#15
Carmen Gianfrani, Gianfranco Mamone, Barbara la Gatta, Alessandra Camarca, Luigia Di Stasio, Francesco Maurano, Stefania Picascia, Vito Capozzi, Giuseppe Perna, Gianluca Picariello, Aldo Di Luccia
Microwave based treatment (MWT) of wet wheat kernels induced a striking reduction of gluten, up to <20 ppm as determined by R5-antibodybased ELISA, so that wheat could be labeled as gluten-free. In contrast, analysis of gluten peptides by G12 antibody-based ELISA, mass spectrometry-based proteomics and in vitro assay with T cells of celiac subjects, indicated no difference of antigenicity before and after MWT. SDS-PAGE analysis and Raman spectroscopy demonstrated that MWT simply induced conformational modifications, reducing alcohol solubility of gliadins and altering the access of R5-antibody to the gluten epitopes...
January 11, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28088280/comparative-study-of-colloidal-gold-and-quantum-dots-as-labels-for-multiplex-screening-tests-for-multi-mycotoxin-detection
#16
Astrid Foubert, Natalia V Beloglazova, Sarah De Saeger
Quantum dots (QDs) and colloidal gold nanoparticles (CG) were evaluated as labels for multiplex lateral flow immunoassay (LFIA) for determination of mycotoxins deoxynivalenol (DON), zearalenone (ZEN) and T2/HT2-toxin (T2/HT2) in cereal matrices. Both developed assays were based on the same immunoreagents (except for the labels), therefore their analytical characteristics could be objectively compared. For both LFIAs antigens (DON-ovalbumin (OVA), ZEN-OVA and T2-OVA) and rabbit anti-mouse immunoglobulin were immobilized on a nitrocellulose membrane as three test lines and one control line, respectively...
February 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28081547/diagnosis-of-pancreaticobiliary-malignancy-by-detection-of-minichromosome-maintenance-protein-5-in-biliary-brush-cytology
#17
Margaret G Keane, Matthew T Huggett, Michael H Chapman, Gavin J Johnson, George J Webster, Douglas Thorburn, James Mackay, Stephen P Pereira
BACKGROUND: Biliary brush cytology is the standard method of evaluating biliary strictures, but is insensitive at detecting malignancy. In pancreaticobiliary cancer minichromosome maintenance replication proteins (MCM 2-7) are dysregulated in the biliary epithelium and MCM5 levels are elevated in bile samples. This study aimed to validate an immunocolorimetric ELISA assay for MCM5 as a pancreaticobiliary cancer biomarker in biliary brush samples. METHODS: Biliary brush specimens were collected prospectively at ERCP from patients with a biliary stricture...
January 12, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28081207/myxovirus-resistance-protein-a-mrna-expression-kinetics-in-multiple-sclerosis-patients-treated-with-ifn%C3%AE
#18
Jana Libertinova, Eva Meluzinova, Ales Tomek, Dana Horakova, Ivana Kovarova, Vaclav Matoska, Simona Kumstyrova, Miroslav Zajac, Eva Hyncicova, Petra Liskova, Eva Houzvickova, Lukas Martinkovic, Martin Bojar, Eva Havrdova, Petr Marusic
INTRODUCTION: Interferon-β (IFNß) is the first-line treatment for relapsing-remitting multiple sclerosis. Myxovirus resistance protein A (MxA) is a marker of IFNß bioactivity, which may be reduced by neutralizing antibodies (NAbs) against IFNß. The aim of the study was to analyze the kinetics of MxA mRNA expression during long-term IFNβ treatment and assess its predictive value. METHODS: A prospective, observational, open-label, non-randomized study was designed in multiple sclerosis patients starting IFNß treatment...
2017: PloS One
https://www.readbyqxmd.com/read/28079913/intravenous-immunoglobulin-in-the-treatment-of-hematologic-disorders-in-pediatrics
#19
Gabriela Villanueva, Jill L O de Jong, Jennifer L McNeer
Intravenous immunoglobulin (IVIG) is pooled immunoglobulin G derived from human blood donors. It was introduced in the early 1980s to treat immunodeficiency disorders. Since then, its use has expanded to other fields such as neurology, rheumatology, and hematology. IVIG has been used to provide passive immunity in qualitative and quantitative immunoglobulin disorders, to neutralize antibodies in immune-mediated diseases, and as an immune modulatory agent. The difficulty of producing IVIG in high quantities, in addition to a growing list of "off-label" indications, has resulted in a worldwide shortage and increase in cost...
January 1, 2017: Pediatric Annals
https://www.readbyqxmd.com/read/28079912/intravenous-immunoglobulin-in-the-treatment-of-primary-immunodeficiency-diseases
#20
Deirdre De Ranieri, Nana Sarkoah Fenny
Intravenous immunoglobulin (IVIG) has been used as antibody replacement therapy in primary immunodeficiency diseases (PIDDs) for more than 50 years. Its role as a therapeutic agent has expanded over the past couple of decades as its anti-inflammatory and immune-modulatory mechanisms of action have been elucidated. It is now used "off-label" to treat other autoimmune diseases. This article focuses on the role of IVIG in the treatment of PIDDs characterized by absent or deficient antibody production. Replacement doses are given on a monthly basis in these conditions as a prophylactic measure to prevent acute and serious bacterial infections...
January 1, 2017: Pediatric Annals
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