Evolution, application and clinical significance of profiling chromatin interactions at a genome-wide scale

Over the past few decades, chromatin biology has evolved from viewing chromatin as a static structural scaffold to decoding it as a dynamic, programmable regulatory landscape. At the heart of this transformation is the precise mapping of interactions between functional proteins and cognate DNA elements. Although high-throughput technologies have generated comprehensive atlases of these genomic features, the field is now transitioning from descriptive mapping to mechanistic elucidation, paving the way for predictive diagnostics and target therapeutics. Here, we review the conceptual and methodological evolution of chromatin-protein interaction profiling, tracing the history from classical biochemical footprints to single-cell multi-omic integration. We reason that specific chromatin-protein interactions may serve as key structural linchpins organizing 3D genome architecture. By coupling single-cell multi-omics with functional perturbation, we illustrate how to move beyond observational correlations to establish direct causal links connecting chromatin architecture, epigenetic modifications, and transcriptional outputs. Ultimately, we conceptualize "Sentinel Genomics", an emerging paradigm leveraging these multi-layered chromatin insights to forecast disease trajectories and therapeutic responses well before clinical manifestation.