Enhanced IgG production in eRDF media with and without serum. A comparative study

Area of Science:

• Biotechnology
• Cell Culture Technology
• Bioprocessing

Background:

• Optimizing cell culture media is crucial for efficient monoclonal antibody (Mab) production.
• Evaluating basal media performance under various conditions (serum-free vs. serum-supplemented) is essential for bioprocess development.

Purpose of the Study:

• To compare the efficacy of three basal media—RPMI, DMEM/F12 (DF), and eRDF (enhanced RDF)—for hybridoma cell culture.
• To assess the impact of serum-free (SF) versus serum-supplemented (SS) conditions on cell proliferation, metabolism, and Mab productivity.
• To determine the most cost-effective and high-performing medium for Mab production.

Main Methods:

• Cultured hybridomas in RPMI, DF, and eRDF media, with and without serum supplementation.
• Evaluated cell proliferation, maximum cell density, and Mab production under static and shaker culture conditions.
• Assessed serum-free adaptation, including media without bovine serum albumin (BSA), and scaled up cultures in bioreactors.

Main Results:

• eRDF consistently ranked highest across all evaluated parameters: ease of adaptation, growth rate, maximum cell density, and Mab production, outperforming DF and RPMI.
• Serum-free conditions generally showed 20-50% lower growth performance compared to serum-supplemented conditions across all media.
• eRDF/SF medium achieved a significantly higher Mab titre (193 mg/L) than eRDF/SS (145 mg/L) and was substantially higher than other media tested.
• While scaling up eRDF/SF-BSA improved cell density, Ig levels were lower, indicating BSA's necessity for optimal Ig production.
• Manufacturing cost analysis showed eRDF to be 17-50% cheaper than other media.

Conclusions:

• eRDF is the superior basal medium for Mab production, offering enhanced performance in both serum-free and serum-supplemented conditions.
• Serum-free eRDF medium is highly effective for Mab production, yielding higher titres than serum-supplemented eRDF and significantly outperforming other tested media.
• Bovine serum albumin is essential for maximizing immunoglobulin production in hybridoma cultures, even within the optimized eRDF medium.