Monday, February 13, 2017 Daily Archives

Residual Host-Cell DNA in Biopharmaceutical Products: 96-Well Plate-Based Extraction and Real-Time PCR Assay for Quantitative Measurement

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Regulatory guidelines that cover the development of biopharmaceutical products require testing of host-cell deoxyribonucleic acid (DNA) impurities. Real-time polymerase chain reaction (PCR) has become a popular technology for DNA quantitation and monitoring of process impurities associated with biomanufacturing. One critical challenge associated with host-cell DNA impurity testing is that recombinant proteins (e.g., monoclonal antibodies, MAbs) and their corresponding buffer components often interfere with DNA quantitation in real-time PCR reactions (1, 2). Some sample types do not require a full extraction…

February 13, 2017

A Statistical Approach to Assess and Justify Potential Product Specifications

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As stated in ICH Q6B, specifications are critical quality standards that are both proposed and justified by drug product manufacturers. Xiaoyu et al. provide information on several statistically based strategies to establish specification acceptance criteria (SAC) (1). Here we address an alternative approach to relate proposed SAC for quantitative data to relevant lot history. In particular, proposed SAC can be derived in part by using calculated limits for which the lower bound of an approximate 95% confidence interval for the…

February 13, 2017

Examining Single-Use Harvest Clarification Options: A Case Study Comparing Depth-Filter Turbidities and Recoveries

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Steadily increasing demand for biopharmaceutical drugs has led the industry to examine its manufacturing scales while pressuring research and development groups to produce high-yielding clones and processes. Improved media, feed supplements, bioreactor designs, and control of process parameters have helped biomanufacturers achieve multifold increases in volumetric productivity from production bioreactors. However, cell culture processes are significantly affected by their bioreactor’s ability to support cells at higher densities and sustain cultures at lower viabilities. With the implementation of a number of…

February 13, 2017

Driving Therapeutic Innovations: Academic Institutions Can Help Lessen Development Risks

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During the Biotech Week in Boston this past October, I had a chance to talk with David DiGiusto (Stanford University) about his work toward advancing bioprocessing and cell therapy development. I asked him to comment on points from his keynote presentation about how academic research groups can sustainably cycle assets into the biopharmaceutical pipeline. University research departments have long made innovative technologies available for commercial licensing. But in the excerpt below, he details ways in which such groups are further…

February 13, 2017

Ask the Expert: Top Five Considerations in Outsourcing to a Biomanufacturing Partner

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In BPI’s 5 October 2016 webcast, Paul Jorjorian (director of global technology transfer at Patheon) discussed his top five considerations for companies outsourcing to a biomanufacturing partner. Jorjorian’s Presentation Selecting a contract and development manufacturing organization (CDMO) is an important decision for many biopharmaceutical companies. Beyond time and cost, here are some other criteria to consider. The number-one issue is quality. Is your company’s definition of quality the same as a CDMOs — and if not, how do those definitions…

February 13, 2017