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Protein Based Amorphous Solid Dispersion: a Case Study Investigating Different Whey Proteins at High Drug Loading

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Abstract

Purpose

Whey protein isolate (WPI) has previously been shown to be a promising new excipient for the development of amorphous solid dispersions (ASD) at a high drug loading of 50% (w/w). Whilst WPI is a protein mixture, comprising mainly the three proteins β-lactoglobulin (BLG), α-lactalbumin (ALA), casein glycomacropeptides (CGMP), the individual contributions of these three proteins to the overall performance of whey protein based ASDs has still not been investigated. In addition, the limitations of the technology at even higher drug loadings (i.e., more than 50%) have not yet been explored. In this study, BLG, ALA, CGMP and WPI were each prepared as ASDs with the two poorly water-soluble drugs (Compound A and Compound B) at 50%, 60% and 70% drug loadings.

Methods

Solid state characterization, dissolution rate and physical stability of the obtained samples were analyzed.

Results

All the obtained samples were amorphous and showed faster dissolution rates compared to the respective pure crystalline drugs. However, the BLG based formulations—at least for Compound A—were outperforming the other ASDs in terms of stability, dissolution enhancement and solubility increase.

Conclusion

Overall, the study confirmed that the investigated whey proteins showed their potential in developing ASDs even at high drug loadings of up to 70%.

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Acknowledgements

We thank Arla Foods Ingredients Group P/S for providing the samples of Lacprodan® BLG Pharma Grade, alpha-lactalbumin and Lacprodan® CGMP-20 and whey protein isolate.

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Correspondence to Korbinian Löbmann.

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Conflict of Interest

Donglei Leng, Bulut Bulduk, Ole Wiborg and Korbinian Löbmann are employees at Zerion Pharma A/S, who is developing a technology based on the subject matter or materials discussed in this manuscript.

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Leng, D., Bulduk, B., Widmer, T. et al. Protein Based Amorphous Solid Dispersion: a Case Study Investigating Different Whey Proteins at High Drug Loading. Pharm Res 40, 1865–1872 (2023). https://doi.org/10.1007/s11095-023-03542-9

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  • DOI: https://doi.org/10.1007/s11095-023-03542-9

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