Wednesday, January 1, 2014 Daily Archives

Accounting for the Donnan Effect in Diafiltration Optimization for High-Concentration UFDF Applications

The biopharmaceutical industry is targeting high-concentration protein formulations to enable subcutaneous administrations. Such administration can provide better patient convenience than intravenous administration. One challenge associated with high-concentration formulations is increased electrostatic interaction between proteins and excipients. That is a result of increased protein-charge density at high protein concentrations. Such interactions can create an offset between excipient levels in final products and diafiltration buffers in ultrafiltration processes. The effect of such electrostatic interactions in a membrane process is known as the…

Design of Experiments for Fed-Batch Process Development in Shaken Cultures

When designing a recombinant protein production process, a high number of parallel cultivations must be carried out. That task is typically performed using batch cultures in shake flasks or microwell plates, in which fermentation conditions are not monitored. To overcome that limitation, we combined the SensorDish Reader and Shake Flask Reader systems (from PreSens) with an enzymatic glucose delivery system (EnBase technology from BioSilta Oy) for Escherichia coli cultivations. Our objective was to determine whether SensorDish reader cultures would yield…

Outsourcing Facility Safety for Biomanufacturing

As the life-science industry increasingly outsources noncore functions, some companies are finding that managing the expanding web of safety and environmental requirements associated with various functions is, in turn, growing vastly more complex. As multiple third parties handle numerous noncore activities, the risk — and headaches — of monitoring them effectively is a growing challenge by any standard. At first glance, the lowest-risk solution for many organizations may seem to be managing associated safety programs with in-house personnel and programs.…