Abstract
The critical role of nuclear hormone receptor co-activators in gene expression has been extensively studied for the past few years. Co-regulators (co-activators and co-repressors) are known to utilize various enzymatic activities, in addition to molecular interactions, to modulate gene expression in response to hormonal signals. Recent studies that demonstrate the role of co-regulators in cancer and developmental disorders have revealed their possible role as targets of therapy. A greater understanding of the cellular physiology of co-regulators is necessary to explore the pathological ramifications of hormone-dependent diseases, and to discover new treatments.