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.
The Role of Forced Degradation in Method Development, Manufacturability, and CMC Strategy
April 28th 2025Forced degradation studies are critical in biologics development, particularly for monoclonal antibodies (mAbs). These studies simulate long-term environmental stressors to uncover degradation pathways and ensure the stability of critical quality attributes (CQAs), aiding in robust chemistry, manufacturing, and controls (CMC) strategies and regulatory compliance.
Filter Sizing for Process Optimization in Life Sciences Sterile Filtration
April 24th 2025Bench-scale filterability studies play a critical role in optimizing sterile filtration in biopharmaceutical manufacturing. By guiding the selection and sizing of filters, these studies help streamline processes, improve scalability, and reduce costs. Through data-driven case studies, this paper highlights how the strategic use of pre-filters and membrane materials can maximize throughput and minimize filter fouling.
Ensuring Biologic Stability with Tailored and Cutting-Edge Lyophilization Solutions
April 14th 2025Explore how tailored lyophilization solutions, integrated with quality-by- design principles and advanced modeling, help optimize stability, reduce costs, and enhance global accessibility for biopharmaceuticals.
Top 10 Cleanroom Problems That Can Be Prevented via Preventative Maintenance
April 14th 2025Cleanrooms require strict environmental control to maintain sterility, prevent contamination, and ensure seamless operations. Without a proactive preventative maintenance (PM) program, various issues can arise, leading to costly downtime, contamination risks, and operational inefficiencies. Below are ten common cleanroom problems that can be effectively mitigated through proper PM practices.
