Harnessing mRNA as a Readout to Develop Robust BioPotency Assays
Transcriptional activity within a cell can be used to evaluate cell response to a ligand or promoter activity within a transgene or plasmid within a cell. Catalent has developed a relative potency bioassay using real-time quantitative reverse transcription (RT-qPCR) in a duplex format to assess relative transcription activity in cells treated with ligands or transgenic vectors. The assay utilizes two fluorescent dyes with minimally overlapping emission spectra that allow real-time monitoring of the gene expression of both target and normalizer genes. The assay does not require purification of the mRNA produced by the cells once lysis has occurred. Normalizing the qPCR cycle thresholds (CT) of the target transcript to the reference transcript allows response curve to be generated and compared to a reference standard. The generation of a four-parameter fit curve analysis from raw qPCR cycle threshold data allows for comparison of relative potency and assessment of suitability based on curve parallelism. The assay platform has been used by Catalent to qualify a repeatable, accurate, linear, and specific bioassay for assessing relative potency.
Oligonucleotide Analysis in Pharmaceutical Quality Control
January 14th 2025Melting point determination using ultraviolet-visible (UV-Vis) spectrophotometry can be used as a sequence-specific method for identifying therapeutic oligonucleotides in pharmaceutical quality control. This method offers a simple, highly selective approach to differentiate between isomers and ensure the integrity of oligonucleotide active pharmaceutical ingredients (APIs) and drug products.
Keeping Up With Emerging Analytical Technology
January 9th 2025There are several advantages to using a novel capillary electrophoresis-mass spectrometry (CE-MS) device. The REBEL from 908 Devices offers a streamlined and efficient alternative to traditional liquid chromatography-mass spectrometry (LC-MS) for bioprocess monitoring. This paper highlights how this new technology can simplify media analysis, reduce method development time, and improve real-time data collection for biotherapeutic production.
Cell Density Applications eBook (Jan 2025)
January 8th 2025The eBook features must-see examples of real applications using Hamilton viable cell density monitoring (Incyte) and total cell density monitoring (Dencytee) and demonstrates how to leverage Viable Cell Density Monitoring in your processes.
White Paper: The PAT Pathway to Scalable and Sustainable Precision Fermentation
January 8th 2025Precision fermentation, a sustainable method for producing alternative food ingredients, faces significant technical challenges. This white paper explores the critical role of Process Analytical Technology (PAT) in overcoming these hurdles and ensuring product quality through a Quality-by-Design (QbD) approach. Through a comprehensive review of literature and case studies, key technical challenges are identified to demonstrate how PAT can enhance scalability and sustainability. This paper also highlights the transformative potential of PAT in advancing precision fermentation as a reliable solution for addressing nutritional deficiencies and fostering a circular economy.
