Multiple transcription factor profiling by enzyme-linked immunoassay.

Area of Science:

• Molecular Biology
• Biochemistry
• Immunology

Background:

• Transcription factor-DNA interactions are crucial for gene expression regulation.
• Quantifying these interactions is vital for understanding cellular processes, particularly in inflammation.

Purpose of the Study:

• To establish and validate a novel enzyme-linked immunoassay (ELISA) platform for quantifying specific transcription factor-DNA interactions.
• To profile the binding of multiple transcription factors involved in inflammatory pathways.

Main Methods:

• Developed an ELISA using dsDNA immobilized on 96-well plates to capture transcription factors from mammalian nuclear extracts.
• Utilized transcription factor-specific antibodies for detection and quantification of DNA-bound factors.
• Compared ELISA performance against the traditional electrophoretic mobility shift assay (EMSA).

Main Results:

• The ELISA platform successfully quantified transcription factor-DNA interactions.
• Profiled several key inflammatory transcription factors, including NF-kappaB (p50, p65), c-Rel, c-Fos, CREB-1, and ATF-2.
• Demonstrated a 10-fold increase in sensitivity compared to EMSA.

Conclusions:

• The developed ELISA is a sensitive, rapid, and high-throughput method for quantifying transcription factor-DNA interactions.
• This assay eliminates the need for radioactivity, making it safer and more accessible.
• The platform is effective for profiling transcription factors involved in inflammation.