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Biomarker Insights

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https://www.readbyqxmd.com/read/29449777/a-homogeneous-time-resolved-fluorescence-immunoassay-method-for-the-measurement-of-compound-w
#1
Biao Huang, Huixin Yu, Jiandong Bao, Manda Zhang, William L Green, Sing-Yung Wu
Objective: Using compound W (a 3,3'-diiodothyronine sulfate [T 2 S] immuno-crossreactive material)-specific polyclonal antibodies and homogeneous time-resolved fluorescence immunoassay assay techniques (AlphaLISA) to establish an indirect competitive compound W (ICW) quantitative detection method. Method: Photosensitive particles (donor beads) coated with compound W or T 2 S and rabbit anti-W antibody were incubated with biotinylated goat anti-rabbit antibody. This constitutes a detection system with streptavidin-coated acceptor particle...
2018: Biomarker Insights
https://www.readbyqxmd.com/read/29449776/nkx2-3-a-slippery-slope-from-development-through-inflammation-toward-hematopoietic-malignancies
#2
REVIEW
Dóra Vojkovics, Zoltán Kellermayer, Béla Kajtár, Giovanna Roncador, Áron Vincze, Péter Balogh
The development of peripheral lymphoid tissues from the mesoderm is the result of a complex convergence combining lymphohematopoietic differentiation with the local specification of nonhematopoietic mesenchymal components. Although the various transcriptional regulators with fate-determining effects in diversifying the mobile leukocyte subsets have been thoroughly studied and identified, the tissue-specific determinants promoting the regional differentiation of resident mesenchyme are less understood. Of these factors, various members of the NK-class Nkx paralogues have emerged as key regulators for the organogenesis of spleen and mucosal lymphoid tissues, and recent data have also indicated their involvement in various pathological events, including gut inflammation and hematopoietic malignancies...
2018: Biomarker Insights
https://www.readbyqxmd.com/read/29449775/prion-proteins-without-the-glycophosphatidylinositol-anchor-potential-biomarkers-in-neurodegenerative-diseases
#3
REVIEW
Valerija Kovač, Vladka Čurin Šerbec
Prion protein (PrP) is a biomolecule that is involved in neuronal signaling, myelinization, and the development of neurodegenerative diseases. In the cell, PrP is shed by the ADAM10 protease. This process generates PrP molecules that lack glycophosphatidylinositol anchor, and these molecules incorporate into toxic aggregates and neutralize toxic oligomers. Due to this dual role, these molecules are important biomarkers for neurodegenerative diseases. In this review, we present shed PrP as a potential biomarker, with a focus on PrP226*, which may be the main biomarker for predicting neurodegenerative diseases in humans...
2018: Biomarker Insights
https://www.readbyqxmd.com/read/29449774/reactive-oxygen-species-a-key-constituent-in-cancer-survival
#4
REVIEW
Seema Kumari, Anil Kumar Badana, Murali Mohan G, Shailender G, RamaRao Malla
Background: Cancer is one of the major heterogeneous disease with high morbidity and mortality with poor prognosis. Elevated levels of reactive oxygen species (ROS), alteration in redox balance, and deregulated redox signaling are common hallmarks of cancer progression and resistance to treatment. Mitochondria contribute mainly in the generation of ROS during oxidative phosphorylation. Elevated levels of ROS have been detected in cancers cells due to high metabolic activity, cellular signaling, peroxisomal activity, mitochondrial dysfunction, activation of oncogene, and increased enzymatic activity of oxidases, cyclooxygenases, lipoxygenases, and thymidine phosphorylases...
2018: Biomarker Insights
https://www.readbyqxmd.com/read/29371783/evaluation-of-a-serum-lung-cancer-biomarker-panel
#5
Peter J Mazzone, Xiao-Feng Wang, Xiaozhen Han, Humberto Choi, Meredith Seeley, Richard Scherer, Victoria Doseeva
Background: A panel of 3 serum proteins and 1 autoantibody has been developed to assist with the detection of lung cancer. We aimed to validate the accuracy of the biomarker panel in an independent test set and explore the impact of adding a fourth serum protein to the panel, as well as the impact of combining molecular and clinical variables. Methods: The training set of serum samples was purchased from commercially available biorepositories. The testing set was from a biorepository at the Cleveland Clinic...
2018: Biomarker Insights
https://www.readbyqxmd.com/read/29343939/kinetics-of-procalcitonin-in-pediatric-patients-on-extracorporeal-membrane-oxygenation
#6
REVIEW
Sara Bobillo, Javier Rodríguez-Fanjul, Anna Solé, Julio Moreno, Mònica Balaguer, Elisabeth Esteban, Francisco José Cambra, Iolanda Jordan
Objectives: To assess the kinetics of procalcitonin (PCT) and C-reactive protein (CRP) in pediatric patients who required extracorporeal membrane oxygenation (ECMO) and to analyze its relationship with morbidity and mortality. Patients and methods: Prospective observational study including pediatric patients who required ECMO. Both PCT and CRP were sequentially drawn before ECMO (P0) and until 72 hours after ECMO. Results: A total of 40 patients were recruited...
2018: Biomarker Insights
https://www.readbyqxmd.com/read/29308009/discovery-and-longitudinal-evaluation-of-candidate-biomarkers-for-ischaemic-stroke-by-mass-spectrometry-based-proteomics
#7
Marie Dagonnier, Ira Robin Cooke, Pierre Faou, Tara Kate Sidon, Helen Margaret Dewey, Geoffrey Alan Donnan, David William Howells
Application of acute therapies such as thrombolysis for ischaemic stroke (IS) is constrained because of diagnostic uncertainty and the dynamic nature of stroke biology. To investigate changes in blood proteins after stroke and as a result of thrombolysis treatment we performed label-free quantitative proteomics on serum samples using high-resolution mass spectrometry and long high-performance liquid chromatography gradient (5 hours) combined with a 50-cm column to optimise the peptide separation. We identified (false discovery rate [FDR]: 1%) and quantified a total of 574 protein groups from a total of 92 samples from 30 patients...
2017: Biomarker Insights
https://www.readbyqxmd.com/read/29276374/plasma-cytochrome-c-detection-using-a-highly-sensitive-electrochemiluminescence-enzyme-linked-immunosorbent-assay
#8
Jeejabai Radhakrishnan, Rovi Origenes, Gina Littlejohn, Sanja Nikolich, Eunjung Choi, Sharon Smite, Lorissa Lamoureux, Alvin Baetiong, Manoj Shah, Raúl J Gazmuri
Background: Cytochrome c is an intermembrane mitochondrial protein that is released to the bloodstream following mitochondrial injury. Methods and results: We developed an electrochemiluminescence immunoassay to measure cytochrome c in human and rat plasma, which showed high sensitivity with broad dynamic range (2-1200 ng/mL in humans and 5-500 ng/mL in rat) and high assay reproducibility (inter-assay coefficient <6% in humans and <10% in rat). In patients after blunt trauma, plasma cytochrome c directly correlated with injury severity...
2017: Biomarker Insights
https://www.readbyqxmd.com/read/28959121/inhaled-steroids-and-active-smoking-drive-chronic-obstructive-pulmonary-disease-symptoms-and-biomarkers-to-a-greater-degree-than-airflow-limitation
#9
Philip E Silkoff, Dave Singh, J Mark FitzGerald, Andreas Eich, Andrea Ludwig-Sengpiel, Geoffrey C Chupp, Vibeke Backer, Celeste Porsbjerg, Pierre-Olivier Girodet, Mark T Dransfield, Frederic Baribaud, Vedrana S Susulic, Matthew J Loza
RATIONALE: Chronic obstructive pulmonary disease (COPD) is a heterogeneous disease, and development of novel therapeutics requires an understanding of pathophysiologic phenotypes. OBJECTIVES: The purpose of the Airways Disease Endotyping for Personalized Therapeutics (ADEPT) study was to correlate clinical features and biomarkers with molecular characteristics in a well-profiled COPD cohort. METHODS: A total of 67 COPD subjects (forced expiratory volume in the first second of expiration [FEV1]: 45%-80% predicted) and 63 healthy smoking and nonsmoking controls underwent multiple assessments including patient questionnaires, lung function, and clinical biomarkers including fractional exhaled nitric oxide (FENO), induced sputum, and blood...
2017: Biomarker Insights
https://www.readbyqxmd.com/read/28932105/changes-in-alternative-splicing-as-pharmacodynamic-markers-for-sudemycin-d6
#10
Morgan Thurman, Jacob van Doorn, Barbara Danzer, Thomas R Webb, Stefan Stamm
OBJECTIVE: The aim of the study was to define pharmacodynamic markers for sudemycin D6, an experimental cancer drug that changes alternative splicing in human blood. METHODS: Blood samples from 12 donors were incubated with sudemycin D6 for up to 24 hours, and at several time points total RNA from lymphocytes was prepared and the pre-messenger RNA (mRNA) splicing patterns were analyzed with reverse transcription-polymerase chain reaction. RESULTS: Similar to immortalized cells, blood lymphocytes change alternative splicing due to sudemycin D6 treatment...
2017: Biomarker Insights
https://www.readbyqxmd.com/read/28890654/chondroitin-sulfate-inhibits-monocyte-chemoattractant-protein-1-release-from-3t3-l1-adipocytes-a-new-treatment-opportunity-for-obesity-related-inflammation
#11
Thomas V Stabler, Eulàlia Montell, Josep Vergés, Janet L Huebner, Virginia Byers Kraus
Monocyte chemoattractant protein-1 (MCP-1) overproduction from inflamed adipose tissue is a major contributor to obesity-related metabolic syndromes. 3T3-L1 embryonic fibroblasts were cultured and differentiated into adipocytes using an established protocol. Adipocytes were treated with lipopolysaccharide (LPS) to induce inflammation and thus MCP-1 release. At the same time, varying concentrations of chondroitin sulfate (CS) were added in a physiologically relevant range (10-200 µg/mL) to determine its impact on MCP-1 release...
2017: Biomarker Insights
https://www.readbyqxmd.com/read/28690396/prognostic-impact-of-urokinase-plasminogen-activator-receptor-expression-in-pancreatic-cancer-malignant-versus-stromal-cells
#12
REVIEW
Susanna Wl de Geus, Victor M Baart, Martin C Boonstra, Peter Jk Kuppen, Hendrica Ajm Prevoo, Andrew P Mazar, Bert A Bonsing, Hans Morreau, Cornelis Jh van de Velde, Alexander L Vahrmeijer, Cornelis Fm Sier
The urokinase plasminogen activator receptor (uPAR) has been proposed as a potential prognostic factor for various malignancies. The aim of this study is to assess the prognostic value of uPAR expression in neoplastic and stromal cells of patients with pancreatic adenocarcinoma. Urokinase plasminogen activator receptor expression was determined by immunohistochemistry in 122 pancreatic ductal adenocarcinomas. Kaplan-Meier and Cox regression analyses were used to determine the association with survival. Respectively 66%, 82% and 62% of patients with pancreatic cancer expressed uPAR in neoplastic cells, stromal, and in both combined...
2017: Biomarker Insights
https://www.readbyqxmd.com/read/28659713/making-meaningful-clinical-use-of-biomarkers
#13
REVIEW
Matthew J Selleck, Maheswari Senthil, Nathan R Wall
This review discusses the current state of biomarker discovery for the purposes of diagnostics and therapeutic monitoring. We underscore relevant challenges that have defined the gap between biomarker discovery and meaningful clinical use. We highlight recent advancements in and propose a way to think about future biomarker development.
2017: Biomarker Insights
https://www.readbyqxmd.com/read/28615922/influence-of-circulating-endothelin-1-and-asymmetric-dimethylarginine-on-whole-brain-circulation-time-in-multiple-sclerosis
#14
Lucia Monti, Lucia Morbidelli, Lorenzo Bazzani, Alessandro Rossi
Blood-brain barrier (BBB) breakdown, inflammatory and immune cell activation, and chronic cerebral hypoperfusion are features of multiple sclerosis (MS). The aim is to determine the influence of endothelin-1 (ET1) and asymmetric dimethylarginine (ADMA) on cerebral circulation time (CCT) in patients with MS. In all, 64 patients with MS (39 relapsing-remitting [RR]-MS; 25 secondary progressive [SP]-MS subtype) and 37 controls (C) were studied. Cerebral circulation time was obtained by angiography. Plasmatic ET1 and ADMA were measured by enzyme-linked immunosorbent assay...
2017: Biomarker Insights
https://www.readbyqxmd.com/read/28615921/data-independent-acquisition-and-parallel-reaction-monitoring-mass-spectrometry-identification-of-serum-biomarkers-for-ovarian-cancer
#15
Navin Rauniyar, Gang Peng, TuKiet T Lam, Hongyu Zhao, Gil Mor, Kenneth R Williams
A data-independent acquisition (DIA)/parallel reaction monitoring (PRM) workflow was implemented to identify improved ovarian cancer biomarkers. Data-independent acquisition on ovarian cancer versus control sera and literature searches identified 50 biomarkers and indicated that apolipoprotein A-IV (ApoA-IV) is the most significantly differentially regulated protein. Parallel reaction monitoring with Targeted Ovarian Cancer Proteome Assay validated differential ApoA-IV expression and quantified 9 other biomarkers...
2017: Biomarker Insights
https://www.readbyqxmd.com/read/28469403/effects-of-acute-exercise-on-circulating-soluble-form-of-the-urokinase-receptor-in-patients-with-major-depressive-disorder
#16
Anna Gustafsson, Filip Ventorp, Anita Gm Wisén, Lars Ohlsson, Lennart Ljunggren, Åsa Westrin
Inflammation has been proposed to play a role in the generation of depressive symptoms. Previously, we demonstrated that patients with major depressive disorder (MDD) have increased plasma levels of the soluble form of the urokinase receptor (suPAR), a marker for low-grade inflammation. The aim of this study was to test the hypothesis that acute exercise would induce inflammatory response characterized by increased suPAR and elucidate whether patients with MDD display altered levels of suPAR in response to acute exercise...
2017: Biomarker Insights
https://www.readbyqxmd.com/read/28469402/integrative-analysis-of-microrna-mediated-gene-signatures-and-pathways-modulating-white-blood-cell-count-in-childhood-acute-lymphoblastic-leukemia
#17
Ritika Ramani, Gail Megason, Jason Schallheim, Cynthia Karlson, Vani Vijayakumar, Srinivasan Vijayakumar, Chindo Hicks
MicroRNAs (miRNAs) regulate the expression of protein-coding genes and represent potential biomarkers for childhood acute lymphoblastic leukemia (ALL). However, information linking miRNAs with their messenger RNA (mRNA) target genes modulating white blood cell (WBC) count is lacking. Here, we analyzed miRNAs and gene expression data from pediatric patients with ALL to identify a signature of miRNAs involved in ALL and their mRNA target genes, molecular networks, and biological pathways modulating WBC. We discovered a signature of miRNAs differentially expressed in ALL and a signature of mRNA target genes distinguishing patients with high WBC from patients with low WBC...
2017: Biomarker Insights
https://www.readbyqxmd.com/read/28469401/hepatocyte-growth-factor-c-met-axis-in-thyroid-cancer-from-diagnostic-biomarker-to-therapeutic-target
#18
REVIEW
Maria Trovato, Alfredo Campennì, Salvatore Giovinazzo, Massimiliano Siracusa, Rosaria Maddalena Ruggeri
The hepatocyte growth factor (HGF)/c-met axis plays a crucial role in cancer development by promoting cellular proliferation, motility, and morphogenesis, as well as angiogenesis. Different cellular distributions of both the ligand and the receptor in benign vs malignant lesions indicate this biological system as a candidate for a diagnostic biomarker of malignancy occurring in endocrine glands, such as the thyroid and pituitary. Furthermore, the HGF/c-met expression may help to identify a subset of patients eligible for potential targeted therapies with HGF/c-met inhibitors or antagonists in thyroid tumour, as well as in other malignancies...
2017: Biomarker Insights
https://www.readbyqxmd.com/read/28469400/real-time-reverse-transcription-quantitative-polymerase-chain-reaction-assay-is-a-feasible-method-for-the-relative-quantification-of-heregulin-expression-in-non-small-cell-lung-cancer-tissue
#19
Jessica Kristof, Kellen Sakrison, Xiaoping Jin, Kenji Nakamaru, Matthias Schneider, Robert A Beckman, Daniel Freeman, Cindy Spittle, Wenqin Feng
In preclinical studies, heregulin (HRG) expression was shown to be the most relevant predictive biomarker for response to patritumab, a fully human anti-epidermal growth factor receptor 3 monoclonal antibody. In support of a phase 2 study of erlotinib ± patritumab in non-small cell lung cancer (NSCLC), a reverse-transcription quantitative polymerase chain reaction (RT-qPCR) assay for relative quantification of HRG expression from formalin-fixed paraffin-embedded (FFPE) NSCLC tissue samples was developed and validated and described herein...
2017: Biomarker Insights
https://www.readbyqxmd.com/read/28469399/a-novel-biomarker-panel-to-identify-steroid-resistance-in-childhood-idiopathic-nephrotic-syndrome
#20
Michael R Bennett, LaTawnya Pleasant, Christopher Haffner, Qing Ma, Wendy D Haffey, Jun Ying, Michael Wagner, Kenneth D Greis, Prasad Devarajan
Idiopathic nephrotic syndrome (NS) is the most common glomerular disorder of childhood. Response to initial treatment with corticosteroids is an indicator of prognosis, as resistant patients often present more progressive disease. In this cross-sectional pilot study, we set out to discover a panel of noninvasive biomarkers that could distinguish steroid-resistant nephrotic syndrome (SRNS) from steroid-sensitive nephrotic syndrome (SSNS). Information gleaned from such a panel could yield more individualized treatment plans and prevent unnecessary steroid exposure in patients unlikely to respond...
2017: Biomarker Insights
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