Upstream Processing

Targeting G Protein–Coupled Receptors with Biologics for Therapeutic Use, Part 1

G -protein coupled receptors (GPCRs) represent a target superfamily linked to many disorders across all therapeutic areas. Although this target class has been historically treated by small molecules and peptides, antibodies can offer a number of advantages over such molecules by virtue of their specificity, dosing frequency, and restricted penetration. They also can provide other functional effects specifically mediated by the Fc region (ADCC and CDC) as well as different modalities such as those offered by bispecific and antibody drug…

Qualification of Scale-Down Bioreactors: Validation of Process Changes in Commercial Production of Animal-Cell-Derived Products, Part 2 — Application

Here we apply our approach to validation of animal cell culture process changes using qualified, scale-down bioreactors. As described in Part 1 (including Table 1, Figures 1 and 2, and References 1–23), the goal is to facilitate implementation for the benefit of both the patients and industry. “Qualification of Scale-Down Bioreactors: Validation of Process Changes in Commercial Production of Animal-Cell–Derived Products, Part 1 — Concept” appears on pages 38–45 of BioProcess International’s May 2014 issue. Process changes often entail validation,…

One Billion Mesenchymal Stem Cells in an Eppendorf BioBLU 5c Single-Use Bioreactor at 3.75-L Scale

For BPI’s inaugural “Ask the Expert” webcast, Ma Sha (Eppendorf’s director of technical applications) fielded questions related to his upcoming poster presentation at IBC’s Single-Use Applications for Biopharmaceutical Manufacturing in Boston this month: “One Billion Mesenchymal Stem Cells in Eppendorf BioBLU 5c Single-Use Bioreactor 3.75-L Scale”. Eppendorf R&D Labs is formerly New Brunswick Scientific, which was acquired by Eppendorf in 2007. Sha’s Presentation Our focus recently had been large-scale stem-cell applications in bioreactors. We chose to work on mesenchymal stem…

Qualification of Scale-Down Bioreactors: Validation of Process Changes in Commercial Production of Animal-Cell-Derived Products, Part 1 — Concept

Implementing continuous process improvements is increasing in priority for the biopharmaceutical industry. Such implementation can be driven by product safety, purity, and stability enhancement opportunities as well as by cost-reduction pressures. Companies invest in projects to improve product quality assurance, safety, and yield as well as production efficiency (1). Such changes may come at any process stage, from early cell-growth methods through final-product packaging improvements. Examples include growth medium optimization, purification column operation optimization, and enhanced recovery during final filling…

Cell Therapy Will Transform the Future of Medicine

The third annual IBC Cell Therapy Bioprocessing conference was held in Bethesda, MD, on 21–22 October 2013. It brought pioneers in the development of cell-based therapies together with companies that have enabling technologies, such as bioreactors, cell culture media, and advanced monitoring software. After the conference, I discussed the highlights and key themes coming out of the event with Dr. Phil Vanek, general manager of cell bioprocessing at GE Healthcare Life Sciences in Westborough, MA. Also an instructor for advanced…

Powders and Bulk Liquids

    The two major bioprocess fluids — culture media for upstream production and buffers for downstream processing — are classic single-use products. They are used once and then disposed of. The two basic options for both differ by physical state: powdered media and buffers (“powders” for in-house preparation of liquids by end users) and bulk liquid culture media and buffers, which are fully prepared by their suppliers (“liquids”). We conducted market research studies comparing the benefits and risks (value…

Cell Therapy Bioprocessing Technologies and Indicators of Technological Convergence

The cell therapy industry is undergoing a natural evolution from scientific curiosity into a commercially and clinically attractive opportunity (1). This evolution is by no means complete, and growing evidence suggests that its progression is driving significant developments in cell therapy bioprocessing — notably, convergence. Table 1:&#8 194; () Progressively, bioprocessing technologies primarily used in production of noncell-based products are being evaluated for cell therapy bioprocessing applications (2). Consequently, this process of convergence is leading to an increasing proportion of…

Activatable Immunoconjugates for Target Cancer-Cell–Specific Diagnosis and Therapy

In cancer treatment, early diagnosis and targeted therapies are assumed to yield the highest cure rates. However, most current methods are limited by their low sensitivity to early disease and a lack of specificity for targeted cell killing. Newly developed, activatable immunoconjugates assist in the accurate detection of cancer through in vivo imaging with high target-to-background contrast (1,2). They also provide for the possibility of highly specific, light-mediated treatment with minimal effects on healthy cells surrounding tumors (3). In fact,…

Single-Use, Continuous Processing of Primary Stem Cells

Many potentially therapeutic products involve the culture of stem cells. Their commercial success depends on the development of scalable good manufacturing practice (GMP) technologies that can both robustly and cost-effectively produce very large numbers of cells. Through many improvements and innovations in bioprocessing operations over the years, fed-batch suspension culture has remained the most common mode for large-scale biopharmaceutical manufacturing. However, some recent events suggest that may be changing (1,2). For the culture and expansion of stem cells, large-format adherent…