SPR Analysis

Surface Plasmon Resonance (SPR) Binding Analysis

Regulatory agencies such as FDA and EMA expect every protein-based biologic to be characterized not only by its physicochemical properties, but also by bioactivity, immunochemical properties, purity and impurities. Within this framework, binding properties, affinity and kinetics are, next to safety, among the most critical quality attributes (CQAs) of a biopharmaceutical drug or therapeutic.

Correct target and receptor binding is essential to ensure pharmacological activity, activation/deactivation of pathways and proper distribution and transport in human tissues. Robust binding data are therefore fundamental for lead selection, potency assessment, comparability and biosimilarity studies.

At Biofidus, we use our Biacore 1K surface plasmon resonance (SPR) platform to deliver fast, label-free binding data for an in-depth characterization and comparison of biologics and biosimilars. Biacore SPR has long been considered the gold standard for SPR analysis, providing exceptional sensitivity, accuracy and reliability for affinity (KD) and kinetic (kon, koff) measurements, making it a preferred system for drug candidate characterization and CMC support.

Thanks to a wide range of available sensor chips, flexible assay formats and powerful data analysis software, our Biacore SPR assays are highly customizable. We design tailored experimental pipelines that match your mechanism of action, molecule class and development stage.

Our experienced scientists guide you in line with ICH and regulatory expectations and provide fit-for-purpose SPR bioanalytical packages to support early discovery, lead optimization, CMC development, comparability and biosimilarity.

In accordance with your needs, we adapt and, where required, qualify our SPR methods, tailored to your pharmaceutical product, its formulation matrix and your specific analytical questions.

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

Our Capabilities

  • Target binding affinity & kinetics (KD, kon, koff)
  • Receptor and ligand binding characterization
  • Fc and FcRn receptor binding
  • Competition & blocking assays
  • Affinity ranking & hit/lead validation
  • Stability- & stress-indicating binding assays
  • Comparability & biosimilarity SPR panels
  • Small molecule & fragment binding (where applicable)
  • SPR method 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. Binding assays can be designed as stability- and stress-indicating readouts and as part of comparability/biosimilarity panels to detect functional shifts alongside structural CQAs. In addition, SPR is widely used in regulatory filings to support functional characterization, making it a well-established method in a regulatory context.
Yes. Where relevant, we characterize Fcγ receptor and FcγRn interactions using SPR to support effector-function or PK-related questions alongside other CQAs.
Yes. We can run competition/blocking formats to compare binding to shared epitopes or receptors and support differentiation or biosimilarity questions.

Yes. Using Biacore SPR, we quantify affinity (KD) and kinetics (kon/koff) and run formats such as affinity ranking, competition/blocking assays and Fcγ/FcγRn binding where relevant.

We scope SPR around your sample matrix (DS/DP and buffers) and advise on minimal volume/concentration, sensor format and regeneration strategy to fit limited sample situations. We can also work with cell culture supernatants, provided they are cell-free.

Frequently requested services

Advancing research through tailored bioanalytical solutions.

  • Small molecule screening
  • Antigen affinity ranking
  • Binding kinetics with Fcy receptors
  • Binding affinity to FcRn

TECHNOLOGIES USED

  1. Biacore 1k
  2. Reichert 2SPR

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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