Development and validation of home-made Luminex assays for the quantification of multiple cytokines in human samples

Cytokine profiling is a key tool to understand immune system status, disease pathogenesis and treatment efficacy. It supports the functional characterisation of cells and serves as a surrogate marker in in vitro potency testing. While traditional ELISA methods require separate analysis for each cytokine, multiplex approaches such as Luminex assays enable simultaneous quantification, reducing both time and sample volume requirements.

This application note presents the development and validation of home-made Luminex assays, including multiplex configurations, to deliver reliable cytokine measurement in human samples. The full technical details and validation data are available in the complete application note below.

Key highlights of the method

• Development of a 3-plex Luminex assay for TNFα, IL-2 and Perforin with validated accuracy, precision, sensitivity and quantification range
• No cross-reactivity observed between analytes, microbeads or detection antibodies in multiplex conditions
• Standard curves fitted with 5-PL models showing strong correlation (R² ≥ 0.99), with accuracy and precision within ≤ 20%
• Demonstrated stability of coupled beads over up to 18 months with no decrease in signal
• Successful optimisation and validation of a 7-plex assay compliant with bioanalytical guidelines, including precision, inaccuracy, stability and dilutional linearity

How this supports your analytical programme?

These validated Luminex approaches support reliable and flexible cytokine quantification strategies in complex biological samples.

• Enable simultaneous quantification of multiple cytokines, improving analytical efficiency and reducing sample consumption
• Provide robust and validated performance aligned with bioanalytical method validation expectations
• Allow custom assay development using home-made coupled beads when commercial solutions are limited or incompatible
• Ensure high specificity with no observed cross-reactivity or carryover effects
• Deliver comparable performance to commercial kits, with potential improvements in sensitivity

These features help increase confidence in cytokine profiling results across research and development workflows.

Applications / Use cases

• Cytokine profiling for immune system characterisation
• Evaluation of treatment efficacy and disease-related biomarkers
• In vitro potency testing using cytokine expression as surrogate markers
• Quantification of cytokines in human samples such as PBMC supernatants and serum