Investigating transcription factor dynamics in health and disease using FRAP

Fluorescence recovery after photobleaching (FRAP) is a widely used technique for investigating protein dynamics in live cells. FRAP enables researchers to monitor protein mobility and binding interactions in real time, providing valuable insights into cellular regulatory mechanisms. Initially developed to explore membrane fluidity, FRAP has evolved to enable study of nuclear processes, including transcription factor (TF) dynamics crucial for gene regulation. In this review, we focus on how FRAP has advanced our understanding of TF dynamics in health and disease. TFs exhibit complex interactions with DNA that are essential for cellular function. FRAP helps to quantify these interactions, revealing how TF mobility and chromatin binding influence gene expression patterns. We further explore the role of FRAP in studying TFs in disease. Research on TF dynamics in cancer, diabetes, and osteoarthritis underscores the method's potential to identify disease-related regulatory mechanisms. By providing a nuanced understanding of TF behavior, FRAP presents a promising avenue for developing targeted therapies across diverse pathologies.