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By Robert F. Dream, Principal, HDR Company, LLC
Recently, a number of different trends have converged to demand a new type of biopharmaceutical facility, one that emphasizes flexibility and agility. Drawing this new blueprint are:
Today’s biopharmaceutical manufacturing facilities are smaller and more flexible, efficient and cost-effective than those of the 1990’s, and they are able to adapt quickly to market changes. The goal isn’t technology in and of itself, but greater product and process knowhow for speed to market. With modular systems, we can now place an entire small-scale clinical production line inside an 18’ x 42’ x 13’ (W x L x H) environment.
Based on defense and health department standards, vaccine manufacturing facilities have been blazing new trails. Traditionally, it has taken between 14 and 20 years to move from pathogen identification to vaccine safety and efficacy trials. The new goal, set by the U.S. Defense Department’s DARPA (Defense Advanced Research Projects Agency), and repeated in specs set by BARDA, is to cover the same ground in less than 22 weeks.
The lifeblood of this flexible, multiproduct and multitechnology future will be the Mobile Bioprocessing Unit (MBU), which has already been built for manufacturing small, clinical-scale quantities of some therapies. (Figures 1-4 illustrate the National Center for Therapeutics Manufacturing, housed at Texas A&M University in College Station, Texas.) The key feature of these mobile units is that they are self-contained, with inherent air handling and other critical equipment and controls built in and standard.
Figure 1. National Center for Therapeutics Manufacturing, designed and built based on Flexible Manufacturing Criteria
Each MBU is used for a single, biologically distinct technology (bacteria, mammalian cells, plants, etc.), thereby eliminating any cross-contamination issues with regulatory agencies. When they are not being used, MBUs are designed to be moved to cleaning and refurbishing areas, and ready to connect when needed. The goal is to:
The Strategic National Stockpile facility for flu vaccine, for instance, calls for 8 to 10 modular process trains for surge production, and allows surge capability to 10 times baseline capacity within 24 hours. Key features of these facilities will be stockpile pods containing complete process lines, and a life-cycle management program, with scheduled rotation through production.
In addition, DARPA is considering construction of adjacent facilities to integrate and validate “clinic ready” emerging technology platforms. These facilities will be closely integrated with other operations, including animal model development and validation, biomarker evaluation, imaging, GLP pre-clinical studies and animal rule efficacy, and human Phase 1 clinical trials.
Vaccines, Biotherapeutics and Personalized Medicine Demand Agility
Business demands are also demanding new facility designs and technologies. By 2016, five of the top ten biopharmaceuticals are expected to be monoclonal antibodies (MAb’s). Follow-on (biosimilar) versions of these will most likely become available in the coming years due to patent expiry and the introduction of legislation for biosimilars. Personalized therapies will further drive the fractionation of the biopharmaceuticals market, thus increasing the need for smaller batch sizes and campaign-based production schemes.
Figure 2. Manufacturing Wing of the NCTM
Business realities, combined with demographic and market forces, will accentuate the national imperative for flexible and more cost-effective manufacturing. Compared with other biopharmaceutical products, monoclonal antibodies are large proteins that require relatively high doses—and traditionally necessitate high-volume manufacturing process equipments/systems and facilities. Many biopharmaceutical facilities are still designed as traditional fixed equipment/systems and facilities, with fixed piping and vessel layout and large bioreactor volumes. Such facilities require a significant financial investment along with high total installation costs.
Recent increases in cell culture yields/titer have led to significantly reduced bioreactor volume requirements, which again have opened the door for single-use manufacturing technologies such as pre-sterilized assemblies of single-use bags, tubing and filters that are only used once and then disposed of. With a financial investment reduction and simplified installation, single-use technology could be more appealing than other fixed technologies.
Combining single-use technology and high-yield processes could further reduce the price tag for comparable facilities by 50 percent. This combination is being pursued in a number of biopharmaceutical facilities today—the full effect is truly a paradigm shift.
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