Smart Biotech Scientist | Master Bioprocess CMC Development, Biologics Manufacturing & Scale-up, Cell Culture Innovation
The Go-to Podcast for Biotech Scientists Who Want to Master Biopharma CMC Development and Biomanufacturing.
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Are you ready to simplify bioprocess development and scale with confidence to reduce time to market?
Are you feeling overwhelmed by the complexity and guesswork of biologics development and biomanufacturing?
Do you wish you had more time to enjoy the beauty of science, without worrying about failing your cell culture process development and commercialization?
There's a way to simplify and streamline so you can remove complexity, skip trials and errors, deliver your groundbreaking therapy to clinics and market without delay, and still enjoy every single step.
I'm David Brühlmann, a biotech entrepreneur and strategic advisor who partners with C-level biopharma leaders to tackle one of our industry's biggest challenges: reducing manufacturing costs to make lifesaving therapies accessible to more patients worldwide.
Through engaging conversations with industry pioneers and practical insights from the trenches, this podcast tackles the critical challenges in bioprocess CMC development and manufacturing of recombinant proteins and cell and gene therapy products. We cut through the complexity so you can:
- Master bioprocess development with confidence and clarity
- Excel at scale-up and manufacturing of biologics
- Transform your innovative therapy and manufacturing technology into market-ready solutions faster
- Optimize manufacturing costs without compromising quality
- Make data-driven decisions that reduce the risk of failure
I can’t wait to help you do biotech the smart way.
Grab a cup of coffee and your favorite notebook and pen. Now is the time to take your bioprocessing game to the next level.
Ready to transform your biomanufacturing journey? Let's dive in!
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Smart Biotech Scientist | Master Bioprocess CMC Development, Biologics Manufacturing & Scale-up, Cell Culture Innovation
227: Media-Based Glycan Engineering for Biosimilars: Achieving Reference Product Match
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When your biosimilar analytical data shows 1.4% high mannose against a 6% reference product specification, you face limited options: process temperature shifts that compromise titer, kifunensine supplementation that requires extensive regulatory justification, or 12-18 months to reclone and revalidate. Media supplementation offers an alternative pathway—tuning glycan profiles through formulation adjustments rather than cell line or process re-engineering.
In this episode, David Brühlmann presents the experimental development of a media supplementation strategy that achieved 2.8-fold increases in high mannose glycans across multiple CHO cell lines. Drawing from research published in the Journal of Biotechnology (2017, 252:32-42), the discussion covers the mechanism of raffinose-mediated glycan processing arrest, the experimental variables that initially obscured the effect, and the process development considerations for implementing media-based glycan tuning.
The episode examines N-glycan biosynthesis in CHO cells, regulatory comparability requirements for biosimilar glycosylation profiles, and the experimental framework for evaluating media supplementation as a glycan control strategy.
Highlights from the episode:
- The unexpected link between dietary raffinose and reduced athletic performance, and its connection to bioprocessing (01:11)
- A clear primer on the importance of glycosylation for biosimilar drugs and regulatory approval (02:43)
- Common challenges when glycan profiles don't match reference products, and why high mannose glycans matter (04:19)
- A review of industry strategies (temperature shifts, enzyme inhibitors, cell line reengineering) and their pitfalls (05:33)
- Mechanistic insights into how raffinose alters glycan processing in CHO cells (07:05)
- Key experimental findings on raffinose concentration, osmolality control, and practical lab troubleshooting (09:48)
- Application stories and regulatory considerations for implementing raffinose-based media adjustments (13:47)
- Closing thoughts on process optimization, regulatory impact, and what to expect in Part 2 (15:11)
Strategic insight:
Implementing raffinose as a media supplement is straightforward, regulatory-friendly, and cost-effective. It does not involve genetic engineering or enzyme inhibitors and is easily sourced as a GMP-grade material. For programs approaching submission with glycan comparability gaps, media-based tuning offers a process optimization pathway that maintains existing cell lines and manufacturing platforms while addressing critical quality attribute specifications.
Listen to this episode of the Smart Biotech Scientist Podcast to learn David’s best strategies for rapid, regulatory-friendly glycosylation control.
If you want to transform your glycoengineering workflow, keep an eye (and ear) out for the next episode of the Smart Biotech Scientist Podcast. Your path to regulatory success might be as simple as a pinch of raffinose.
Resources: Journal of Biotechnology, 2017, volume 252, pages 32 to 42
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