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The End of Phase 3 Clinical Trials in Biosimilars Development?

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Abstract

Most patients still have limited or no access to life-changing therapeutic proteins in the treatment of their cancer or autoimmune disorders. The current clinical development model of biosimilars is expensive, and in most cases, large, phase 3 trials do not provide meaningful information on the clinical equivalence of biosimilars and reference compounds. At the same time, the development of state-of-the-art orthogonal analytical methods has enabled a better understanding of the structure and structure–function relationship of biotherapeutics. Hence, we suggest here that a solid chemistry, manufacturing, and controls (CMC) package and meaningful phase 1 studies will leave limited uncertainty on biosimilarity, which can be addressed—if needed—by post-approval, long-term follow-up studies (post-approval studies, pharmacovigilance, real world evidence data and registries, and possibly new post-approval models to be developed). We believe that this new approach may be more appropriate than 600- to 1000-patient, phase 3 trials in assessing biosimilarity and therapeutic equivalence, under the condition that the administered biosimilar given to individual patients can be clearly identified. Obviously, there will probably never be a “one size fits all” development model, and an individualized, risk-based approach to biosimilar development will always have to be considered and discussed early with regulators.

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Correspondence to Francois-Xavier Frapaise.

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No funding was received for the preparation of this review.

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Dr Frapaise has no conflicts of interest.

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Frapaise, FX. The End of Phase 3 Clinical Trials in Biosimilars Development?. BioDrugs 32, 319–324 (2018). https://doi.org/10.1007/s40259-018-0287-0

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  • DOI: https://doi.org/10.1007/s40259-018-0287-0

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