Oligonucleotide characterization is a rapidly advancing field in the biopharmaceutical industry. Understanding critical quality attributes, such as intact mass and impurities, requires a toolbox of analytical techniques, which commonly includes liquid chromatography-mass spectrometry (LC-MS). Oligonucleotide LC-MS analysis frequently requires sample run times upward of 15 min to achieve separation of multiple oligonucleotide species. Additionally, LC methods frequently employ mobile phase additives such as triethylamine and 1,1,1,3,3,3-hexafluoro-2-propanol that are not always desired for use in MS instrumentation. Here, microfluidic capillary electrophoresis mass spectrometry (CE-MS) via ZipChip technology was employed to enable rapid intact mass analysis of oligonucleotide single strands. Baseline separation of equal length oligonucleotides was achieved in less than 4 min. Additionally, the potential of the ZipChip platform for separation of oligonucleotide full-length products (FLPs) and their impurities was evaluated.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/jasms.3c00217 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Editorial Commentary: The Free Floating Disc Shaped Polycarbonate-Urethane Meniscal Implant Has High Reoperation Rates at 24 Months Follow-up.
Arthroscopy
January 2025
Fellowship Director Emeritus, Plano Orthopedic and Sports Medicine Center, Plano Texas.
A free-floating disc shaped polycarbonate-urethane ultra-high molecular weight polyethylene fiber reinforced medial compartment implant is designed for symptomatic postmedial meniscectomy syndrome. Because it is not sutured into place, an intact 2mm meniscus rim with intact anterior and posterior meniscal horns are required. In a recent 24-month follow-up study, only 64% of the original implants were retained.
View Article and Find Full Text PDFEvaluation of the Effect of Different Universal Adhesives on Remineralized Enamel by Shear Bond Strength and Fe-SEM/EDX Analysis.
J Funct Biomater
January 2025
Restorative Dentistry Department, Faculty of Dentistry, Gazi University, 06510 Ankara, Turkey.
The aim of this study is to evaluate the shear bond strength of different universal adhesives applied to intact, demineralized, and remineralized enamel surfaces with total-etch and self-etch modes and to examine the effect of universal adhesives on the Ca/P mineral atomic and mass ratios of these enamel with FE-SEM/EDX (Field Emission Scanning Electron Microscopy with Energy Dispersive X-Ray Spectroscopy) analysis. For this study, 264 bovine incisors were used. Samples in the demineralized and remineralized groups were kept in demineralization solution at 37 °C for 96 h to make an artificial initial carious lesion.
View Article and Find Full Text PDF"Small is beautiful" - Examining reliable determination of low-abundant therapeutic antibody glycovariants.
J Pharm Anal
October 2024
Department of Biosciences and Medical Biology, Bioanalytical Research Labs, University of Salzburg, Salzburg, 5020, Austria.
Glycans associated with biopharmaceutical drugs play crucial roles in drug safety and efficacy, and therefore, their reliable detection and quantification is essential. Our study introduces a multi-level quantification approach for glycosylation analysis in monoclonal antibodies (mAbs), focusing on minor abundant glycovariants. Mass spectrometric data is evaluated mainly employing open-source software tools.
View Article and Find Full Text PDFIntact N-glycopeptide analysis of human platelets reveals a Glycostructure important for platelet function.
Glycobiology
January 2025
Institute of Blood Transfusion, Shanghai Blood Center, 1191 Hongqiao Road, Shanghai 200051, China.
Glycosylation is an important posttranslational modification in platelets, and the glycosylation pattern is critical for platelet function. To date, the exploration of the roles of various glycoforms in specific platelet functions is largely lacking. In this study, a global analysis of intact N-glycopeptides in human platelets was performed to map all the glycopeptides, glycosites and glycans of platelets.
View Article and Find Full Text PDFChallenges and Insights in Absolute Quantification of Recombinant Therapeutic Antibodies by Mass Spectrometry: An Introductory Review.
Antibodies (Basel)
January 2025
Federal Institute of Material Testing and Research (BAM), 12489 Berlin, Germany.
This review describes mass spectrometry (MS)-based approaches for the absolute quantification of therapeutic monoclonal antibodies (mAbs), focusing on technical challenges in sample treatment and calibration. Therapeutic mAbs are crucial for treating cancer and inflammatory, infectious, and autoimmune diseases. We trace their development from hybridoma technology and the first murine mAbs in 1975 to today's chimeric and fully human mAbs.
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!