Widely used in cellular signaling research due to its role as a second messenger in numerous biological pathways. It activates protein kinase A (PKA), which regulates processes such as metabolism, gene expression, and cell division. Commonly applied in studies involving hormone action, neurotransmission, and cardiac function. Also used in molecular biology to investigate signal transduction mechanisms in both normal and diseased cells. In biotechnology, it supports cell differentiation and proliferation in culture systems. Its analogs are explored in drug development for conditions like asthma, heart disease, and endocrine disorders.