Development of a new automated IL-6 immunoassay

Area of Science:

• Biochemistry
• Immunology
• Clinical Diagnostics

Background:

• Quantitative detection of interleukin-6 (IL-6) is crucial for monitoring immune responses and inflammation.
• Automated systems are needed for efficient and reliable IL-6 quantification in clinical settings.

Purpose of the Study:

• To develop and validate a novel IL-6 immunoassay for the automated ARCHITECT system.
• To establish a sensitive and specific method for quantitative IL-6 detection in human serum and plasma.

Main Methods:

• Monoclonal antibodies were produced and screened to select an optimal antibody pair for IL-6 capture and detection.
• The prototype immunoassay was developed and validated on the ARCHITECT system, comparing performance against existing assays.
• Assay specificity, spike recovery, and calibrator stability were determined.

Main Results:

• The prototype IL-6 assay demonstrated high sensitivity with a limit of detection of 0.317 pg/mL.
• Spike recovery ranged from 90%-110% in serum and plasma, indicating accurate quantification.
• The assay was specific for IL-6, showed no cross-reactivity, and was 10-fold more sensitive than a comparator assay.

Conclusions:

• The prototype ARCHITECT IL-6 automated immunoassay is a reliable and robust method.
• This assay enables accurate quantitative determination of IL-6 in human serum and plasma.
• The developed immunoassay can aid in monitoring inflammatory responses and guiding patient management.