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Homogeneous assays allow direct "in well" cytokine level quantification
Stephanie Achard1, Alexandre Jean, Danielle Lorphelin
1CIS bio international, HTRF/Bioassays, BP 81475, 30204 Bagnols-sur-Ceze Cedex, France.
Assay and Drug Development Technologies
|April 20, 2004
Summary
We developed homogeneous cytokine assays using time-resolved Förster resonance energy transfer (TR-FRET). This streamlined method simplifies cytokine analysis by allowing simultaneous cell incubation and antibody addition, improving workflow efficiency.
Area of Science:
- Biochemistry
- Immunology
- Assay Development
Background:
- Cytokine detection is crucial for understanding cellular responses.
- Traditional methods often involve complex multi-step procedures.
- Homogeneous assays offer potential for simplified analysis.
Purpose of the Study:
- To develop and validate homogeneous cytokine assays using TR-FRET.
- To streamline the process of cytokine production analysis.
- To assess the feasibility of integrating cell stimulation and antibody incubation.
Main Methods:
- Development of TR-FRET assays utilizing europium cryptate and allophycocyanin conjugates.
- Co-incubation of cells with antibody pairs during the stimulation phase.
- Validation of assay performance with cells present during the reading step.
Main Results:
- Successful development of homogeneous TR-FRET cytokine assays.
- Demonstration that cell presence does not interfere with assay readings.
- Significant reduction in sample handling steps, including transfers and storage.
- Facilitation of efficient follow-up of cytokine production.
Conclusions:
- Homogeneous TR-FRET cytokine assays provide a streamlined and efficient method for analysis.
- The developed procedure simplifies sample handling and improves workflow.
- This approach facilitates robust monitoring of cytokine production in cellular studies.