Aquanititave semimicro, semiautomated colorimetric assay for interferon

Area of Science:

• Immunology
• Virology
• Biochemistry

Background:

• Interferon (IFN) is crucial for antiviral defense.
• Accurate quantification of IFN is essential for research and therapeutic applications.
• Existing assays may require large sample volumes or complex procedures.

Purpose of the Study:

• To adapt and validate a colorimetric assay for semimicro quantities of interferon.
• To optimize assay conditions for precise and sensitive IFN titer determination.
• To establish a reliable method for quantifying interferon mass.

Main Methods:

• Utilized a colorimetric assay based on vital dye uptake for cell viability.
• Adapted the assay for semimicro scale with semiautomated techniques.
• Investigated factors influencing IFN titer, including treatment duration, viral challenge multiplicity, and replicative cycles.

Main Results:

• The semimicroassay demonstrated precision, sensitivity, convenience, and reliability.
• Interferon titer was primarily determined by the sample volume, indicating a mass-based measurement.
• The assay is effective for both human and mouse cell-derived interferon.

Conclusions:

• The adapted semimicroassay provides a simple, rapid, and accurate method for determining interferon mass.
• This method is suitable for various research settings requiring sensitive IFN quantification.
• The assay's reliability in human and mouse systems broadens its applicability.