Early genes expression refers to the initial stages of gene activation. The term involves the onset of gene expression, transcription, and the translation of proteins in a cell. It is a crucial process in many biological systems, including the growth and differentiation of cells. Synonyms for early genes expression include pre-activation genes, immediate early genes, and primary response genes. Immediate early genes are activated directly by extracellular signals to generate a rapid response. Primary response genes are often activated by immediate early genes, and they play an essential role in the downstream process during gene expression. Understanding early genes expression is crucial in the study of gene regulation, and it may help in the development of medical treatments and therapies.