Bioactivity Studies

Bioactivity & Potency Testing

Regulatory agencies such as FDA and EMA expect every protein-based biologic to be characterized not only by its physicochemical properties, but also by biological activity, immunochemical properties, purity and impurities. Among these, bioactivity and potency are, next to safety, the most critical quality attributes (CQAs) of a biopharmaceutical drug or therapy.

Biological activity describes the specific ability of a product to trigger a defined biological effect. It is essential for dose selection, potency assignment, lot release and stability studies, and it is fundamental for comparability and biosimilarity assessments versus a reference product.

At Biofidus, we offer a wide range of functional bioactivity assays, including surface plasmon resonance (SPR), tailored cell-based assays, and ELISA formats, to characterize both the biophysical interactions and the biological activity of your biologic or biosimilar.

The data generated help you understand efficacy, quality and safety, and support the development and improvement of process control strategies throughout manufacturing.

In line with your needs, we adapt and, where required, qualify our platform methods according to ICH guidelines, tailoring them to your drug substance, its formulation matrix and your specific analytical questions, from early research to late-stage clinical development and lifecycle changes.

Get in contact with us to find the optimal strategy for your project and to speak directly from scientist to scientist.

Our Capabilities

  • Tailored cell-based potency assays
  • Target binding, affinity & kinetics
  • Fc effector function & immune cell engagement
  • Neutralization & blocking activity
  • Dose–response analysis & potency assignment
  • Stability-indicating bioactivity assays
  • Comparability & biosimilarity bioassays
  • Immunomodulatory activity & cytokine release profiling
  • Tailored bioassay development & qualification

Just what you need? Contact us!

FAQ

Find answers to frequently asked questions about our analytical services, methods, technologies, and studies, from molecular characterization and bioactivity to comparability, stability, and fit-for-purpose method development. 

Yes. We build comparability and biosimilarity bioassay panels to detect meaningful functional differences between biosimilar and reference lots.

Yes. We develop, optimize and qualify bioassays as needed to support CMC programs, focusing on robustness, precision and fit-for-purpose performance.

We routinely perform functional bioactivity assays, including SPR, ELISA, and tailored cell-based assays, to connect binding properties with biological activity. For ADCs, we also frequently develop internalization assays.

Yes. We can design stability- and stress-indicating functional assays to complement physicochemical analytics in stability and forced degradation programs.

Bioactivity describes the ability to trigger a defined biological effect, while potency testing quantifies that effect (often via dose–response). We design assays that match your MoA and intended use.

Bioanalytical Services

Advancing research through tailored bioanalytical solutions.

  • Binding and kinetic assays using surface plasmon resonance (SPR/Biacore)
  • Enzyme-linked immunosorbent assays (ELISA)
  • Tailored cell-based bioassays
  • Further potency assays
  • Internalization assays

TECHNOLOGIES USED

  1. Binding and kinetic assays using surface plasmon resonance (SPR)
  2. Enzyme-linked immunosorbent assays (ELISA)
  3. Cell based bioassays

Tell us about Your Project

We‘ll advise you to define your assay needs.

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Our Expert

Across end-to-end delivery, our experts remain on hand with deep scientific expertise whenever needed, providing oversight to streamline and de-risk milestone delivery.
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