MAb

Implementing Cost Reduction Strategies for HuMab Manufacturing Processes

    The combination of innovative and traditional process technologies has resulted in major advancements in the antibody industry, such as accelerated process development and time-to-market. In addition, this paper examines the avenues that have opened as a result of exploring established process technologies for new applications, as in the case of perfusion cell cultures to amplify dhfr-based expression cell lines by incrementally increasing selection markers in the perfusion medium for the faster generation of stable and high-productivity clones. Furthermore,…

A Readily Available Source of BSA Consistently Supports Cultivation and Differential Gene Expression

    Lyme disease caused by the spirochete Borrelia burgdorferi is the leading vector-borne illness in the United States (1). The natural infectious lifecycle of B. burgdorferi is complex in that it is necessary for the bacteria to colonize both an arthropod vector (the Ixodes scapularis tick, pictured right) and a mammalian host (2). As the bacteria transitions between those two diverse niches, it alters the expression of its major outer surface proteins (Osps) such that expression of those that…

TFF Membranes for High MAb Concentration

In a typical monoclonal antibody (MAb) purification process, immediately after cell culture and supernatant clarification (its objective being to remove whole cells, cell debris, and particulates), the protein product is typically bound to an affinity chromatography resin and then recovered by elution using a buffer solution. Once recovered, the resulting protein solution is further purified through additional chromatography and virus clearance steps before being concentrated until a final solution is ready for filling and finishing operations. PRODUCT FOCUS: MONOCLONAL ANTIBODIESPROCESS…

Optimizing Vaccine Supply Chains Through Quality Management in Manufacturing

The recent product recalls of PedvaxHib and Comvax vaccine batches are a reminder that the control of vaccine manufacturing processes is of the highest importance. This rings especially true because the target population for these two products is children under the age of five. The Hib vaccine guards against meningitis and other serious infections caused by the bacterium Haemophilus influenzae. In this particular recall, type b vaccine was tested and determined to be free of contaminating microorganisms before being released…

Global Vaccine Commercialization

Defining the optimal market entry strategy for a vaccine is challenging. Worldwide, vaccine markets are commoditized andvery heterogeneous. In addition, with growth and evolving technology, the business model in the vaccines sector is changing. From the traditional vaccine model, constituted mainly of pediatric vaccines used to prevent a well-known series of viral and bacterial infections in large cohorts of healthy patients, we are seeing the emergence of a more pharma-like model that has been stimulated by new technologies, innovation, and…

The Next Generation of Biologicals and Their Production Systems

Combined advances in molecular biology, cell biology, and genomics have led to a wealth of new information about cellular processes. A growing understanding of the fundamentals of cell biology is now being translated into products that use an approach to exert a biological effect that is different from that of most biologicals currently on the market. To date, most biological products consist of highly purified proteins with a specific activity that alleviates or stops the symptoms of a certain condition.…

The Emerging Generation of Chromatography Tools for Virus Purification

Chromatography media and methods have evolved continuously since their introduction a half century ago. Traditional methods use columns packed with porous particles. They still dominate chromatography applications in the field of virus purification, but the past 20 years have witnessed the ascendance of alternative supports, namely membranes and monoliths. These newer media exploit the familiar surface chemistries — ion exchange, hydrophobic interaction, and affinity — but they use unique architectures that offer compelling performance features. The Architecture of Chromatography Media…

Cellular Therapy Success Through Integrated Automation

Cell therapies are being developed for a rapidly expanding range of indications. Genzyme Corporation has a treatment of cartilage in joints in long-term follow-up stage (Genzyme Corporation, www.genzyme.com). Cell Therapies are being investigated successfully in applications to treat infectious diseases such as AIDS, repair spinal cord injuries, strengthen immune systems, and treat neurological disorders such as Alzheimer’s disease, Parkinson’s disease, and epilepsy. Positive results have been reported in treating arteriosclerosis and other cardiovascular diseases, congenital defects, breast reconstruction, and liver…

Probing Thermal Stability of MAbs By Intrinsic Tryptophan Fluorescence

In the arsenal of biophysical techniques available for rapidly monitoring the stability of protein formulations, spectroscopic techniques have some convincing advantages over others (1, 2). The main advantages to using methods such as circular dichroism (CD), infrared spectroscopy (IR) and fluorescence spectroscopy are their extremely high sensitivity (favorable signal-to-noise ratios), freedom from sample interactions with column resins or extrinsic probes (noninvasive techniques), and coverage of an extremely broad protein concentration range — from pM to mM (3, 4). To reduce…

Validation of Adventitious Virus Removal By Virus Filtration

Regulatory bodies around the world expect downstream purification processes to demonstrate robust clearance of model adventitious viruses in time for execution of phase 3 clinical trials and product licensure (1,2,3). Model viruses selected for these studies should represent a diversity of viral physicochemical properties, and the clearance methods applied should include orthogonal mechanisms such as clearance based on size alongside chemical inactivation. Virus filtration is a critical unit operation used in numerous purification processes of monoclonal antibodies (MAbs), recombinant proteins,…