Cell Culture Supplements
Repligen cell culture supplements provide the benefits of serum without its variability, enhancing cell growth, viability, and productivity in chemically defined media.
Evolving Role of Growth Factors in media optimization
Optimizing cell culture growth and productivity is a fundamental objective in biomanufacturing and cell expansion processes. Historically, serum has been the most common additive in cell culture media, providing essential components such as hormones, growth factors, and attachment factors. However, serum introduces several challenges, its undefined composition and animal-derived origin increase the risk of contamination with adventitious agents and batch variability.
As industry transitions toward serum-free and chemically defined media, maintaining robust cell growth and viability becomes more complex. Chemically defined formulations often result in increased oxidative stress and higher cell death rates. Supplementing with recombinant growth factors can mitigate this stress, promoting sustained cell proliferation, metabolic activity, and long-term culture performance.
How Growth Factors Support Cell Culture Performance
Growth factors such as IGF, insulin and EGF promote metabolism, proliferation, and anti-apoptotic signaling. Among these, LONG® R3 IGF-I, a recombinant analog of IGF-I, offers enhanced potency and stability versus native insulin. It activates the IGF-I receptor with higher specificity, supporting stronger growth responses and enabling lower supplementation levels. Similarly, LONG® EGF activates mitogenic pathways that enhance cell division and survival in high-density or stressed cultures.
Supplements Role in Intensified and Perfusion Cultures
Growth factors can add value at multiple stages by accelerating inoculum expansion, supporting early perfusion ramp-up, or extending viability in steady-state production. Incorporating recombinant proteins like LONG® R3 IGF-I or EGF may help delay apoptosis and maintain productivity over longer runs.
Chemically defined media have improved consistency and regulatory confidence, but growth factors remain powerful precision tools for fine-tuning cell growth and viability. For process development teams, thoughtful supplementation guided by a Design of Experiments (DoE) approach can help unlock higher cell density, longer culture longevity, and greater process robustness in modern biomanufacturing.
