Absolute glycoproteomics quantification has drawn tremendous attention owing to its prospects in biomarker discovery and clinical implementation but is impeded by a general lack of suitable heavy isotope-labeled glycopeptide standards. In this study, we devised a facile chemoenzymatic strategy to synthesize a total of 36 human IgG glycopeptides attached with well-defined glycoforms, including 15 isotope-labeled ones with a mass increment of 6 Da to their native counterparts. Spiking of these standards into human sera enabled simplified, robust, and precise absolute quantification of IgG glycopeptides in a subclass-specific fashion. Additionally, the implementation of the absolute quantification approach revealed subclass-dependent alteration of serum IgG galactosylation and sialylation in colon cancer samples.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8715724 | PMC |
| http://dx.doi.org/10.1021/acs.analchem.0c04462 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Digital recombinase polymerase amplification chip based on asymmetric contact angle composite interface.
Anal Chim Acta
February 2025
Institute of Microfluidic Chip Development in Biomedical Engineering, College of Information Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, China. Electronic address:
Background: Digital recombinase polymerase amplification (dRPA) is an effective tool for the absolute quantification of nucleic acids and the detection of rare mutations. Due to the high viscosity or other physical properties of the reagent, this can compromise the accuracy and reproducibility of detection results, which limits the broader adoption and practical application of this technology. In this study, we developed an asymmetric contact angle digital isothermal detection (ACA-DID) chip and optimized the ACA-DID chip structure to achieve rapid digital recombinase polymerase amplification.
View Article and Find Full Text PDFUltrasensitive Quantification of Neonicotinoid Thiamethoxam in Environment using MOF-derived CuCoO/3D rGO Based Electrochemical Sensor Integrated with Optimized Neural Network.
Environ Res
January 2025
Department of Chemistry, University college in Al-Jamoum, Umm Al-Qura University, 21955, Makkah, Saudi Arabia.
Accurate quantification of neonicotinoid insecticides is pivotal to ensure environmental safety by examining and mitigating their potential harmful effects on pollinators and aquatic ecosystems. In this scenario, detection of neonicotinoid insecticide, thiamethoxam (TMX), is significant for safeguarding ecological balance and human health. Hence, we developed a highly sensitive electrochemical sensor for detection of TMX in environmental samples, utilizing a novel nanocomposite with superior electrocatalytic properties and integrating an optimized neural network for accurate data analysis.
View Article and Find Full Text PDFTowards measurements of absolute membrane potential in Bacillus subtilis using fluorescence lifetime.
Biophys Rep (N Y)
January 2025
UCLA-DOE Institute for Genomics and Proteomics, Department of Biological Chemistry, University of California at Los Angeles, Los Angeles, CA 90095, USA,; Department of Chemistry and Biochemistry, University of California at Los Angeles, Los Angeles, CA 90095, USA,; Department of Physiology, University of California at Los Angeles, Los Angeles, CA 90095, USA,; California Nano Systems Institute, University of California at Los Angeles, Los Angeles, CA 90095, USA,; Department of Physics, Institute for Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 52900, Israel.
Membrane potential (MP) changes can provide a simple readout of bacterial functional and metabolic state or stress levels. While several optical methods exist for measuring fast changes in MP in excitable cells, there is a dearth of such methods for absolute and precise measurements of steady-state membrane potentials (MPs) in bacterial cells. Conventional electrode-based methods for the measurement of MP are not suitable for calibrating optical methods in small bacterial cells.
View Article and Find Full Text PDFDiagnostic Efficacy of Iodo-Metaiodobenzylguanidine SPECT/CT in Cardiac vs. Neurological Diseases: A Comparative Study of Arrhythmogenic Right Ventricular Cardiomyopathy and α-Synucleinopathies.
Diagnostics (Basel)
December 2024
Department of Medicine I, University Hospital Munich, Ludwig-Maximilians-University, 81377 Munich, Germany.
: Iodo-metaiodobenzylguanidine single photon emission computed tomography/computed tomography (I-MIBG SPECT/CT) is used to evaluate the cardiac sympathetic nervous system in cardiac diseases such as arrhythmogenic right ventricular cardiomyopathy (ARVC) and α-synucleinopathies such as Parkinson's diseases. A common feature of these diseases is denervation. We aimed to compare quantitative and semi-quantitative cardiac sympathetic innervation using I-MIBG imaging of ARVC and α-synucleinopathies.
View Article and Find Full Text PDFAnalysis of the Distribution Pattern and Prophage Types in Asiaticus 'Cuimi' Kumquat.
Plants (Basel)
December 2024
National-Local Joint Engineering Laboratory of Citrus Breeding, Cultivation/Horticulture Research Institute, Sichuan Academy of Agricultural Sciences, Chengdu 610066, China.
The 'Cuimi' kumquat is a unique citrus cultivar known for its thin, crisp pulp and sweet, aromatic flavor. In addition to its use in fresh consumption and processing, this variety exhibits certain medicinal properties. This study aims to investigate the genetic diversity of the Huanglongbing (HLB) bacterium across different tissues of the 'Cuimi' kumquat, offering a theoretical basis for understanding the HLB epidemic in Dechang County, Sichuan.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!