Overcoming the Challenge of Polysorbate Degradation
Polysorbates (e.g., polysorbate 80) and Tween™ are the go-to formulation excipients for biologic development due to their ability to minimize protein aggregation and improve product stability.
The downside: free fatty acid (FFA) particles form when polysorbate is stored for long periods at low temperatures, which can have devastating consequences. Traditional methods of analysis like light obscuration (LO) and flow imaging (FI) cannot identify degradation sources.
To get more detailed data, you need a high-throughput solution, which is easier said than done given polysorbate’s complicated chemistry and low concentrations.
At Halo Labs, our pioneering Aura technology allows us to do something that no other company can - provide high-precision fluorescence labeling of free fatty acid for biologics.
BODIPY FL C16 staining 3 different free fatty acids
Why Use Aura to Monitor Polysorbate Degradation?
Because you can achieve so much more insight with much less material:
- Complete biologic particle characterization for stability
- Definitively ID free fatty acids, the degradation product of polysorbate
- Gather comprehensive data and insight into particles – size, morphology, counts, distribution
- Sample volumes that meet your requirements – accurate analysis with 5 µL – 10 mL of sample
- High-throughput 96-well format for testing lots of conditions
- Rapid analysis time of about 1 minute per sample
- High-resolution particle images
- Automated data analysis with Particle Vue software
- 21 CFR Part 11 compliant software upgrade available
BMI + FMM Technology Set Aura Apart
Aura systems utilize two cutting-edge methods, Backgrounded Membrane Imaging (BMI) and Fluorescence Membrane Microscopy (FMM), to accurately detect free fatty acid particles in a sample. With these powerful imaging techniques, it is now possible to measure free fatty acids with an accuracy that has never been seen before.
To further amplify measurement results, fluorescent stains like Thioflavin T (ThT), a sensitive fluorescent dye, can be used to identify and analyze subvisible protein formulation excipients.
Check out the simplicity of the FMM process.
In the presence of hIgG, our method offers ultra-sensitive detection and quantification limits for free fatty acids.
Get Accurate, Quantitative Results in Hours
With Aura's polysorbate degradation assay, you won't have to spend days combing through irrelevant data in search of a needle in a haystack — polysorbate concentrations are also much lower (<<0.5%) than biologic concentrations (>100 – 200 mg/mL).
This method can be used with as little as 5 µL to as much as 10 mL of sample, and it can be used to test as many as 96 samples at once for the presence of free fatty acid particles, which form when polysorbates degrade.
Identify Free Fatty Acid Particles
Polysorbate degradation can break down into three distinct fatty acids: lauric, myristic, and palmitic acid, leading to the formation of particles with distinct morphological characteristics.
Using Aura's advanced labeling and imaging, you can differentiate particles down to the subvisible level and detect unique morphological characteristics. To identify free fatty acids specifically and accurately, BODIPY™ FL C16 offers a powerful stain with high affinity that will help you make sense of your sample.
This offers an opportunity for detailed analysis of free fatty acid particles that can then be confirmed with FMM using labeled fluorescence.
Get an up-close look of fatty acid particles with BMI on Aura.
Featured products
Aura+
With the ability to support the full range of development and manufacturing applications across therapeutic approaches—including protein/antibody therapeutics, gene therapies, cell therapies, and small molecules— Aura+ packs powerful flexibility into a single particle analyzer.
Features
- 5 µL to 10 mL volume
- Particle characterization for protein, cell and gene therapeutics
- Three fluorescent channels for particle identification
- 4x and 20x magnification imaging
Aura PTx
Get the most out of your protein therapy quality measurements with Aura PTx. Our advanced technology can quickly detect, count and characterize excipients and subvisible particles, giving you valuable insights into drug stability during early stages of product development.
Features
- Fluorescence enabled for protein analysis and immunoassays
- Degraded polysorbate and excipient analysis
- High throughput, low volume platform for formulations development
- USP 788 compliant
