TG4-155 is primarily utilized in the field of medical research, particularly in the study of cancer and neurodegenerative diseases. It functions as a potent and selective inhibitor of the enzyme phosphodiesterase 4 (PDE4), which plays a crucial role in regulating intracellular signaling pathways. By inhibiting PDE4, TG4-155 helps in reducing inflammation and modulating immune responses, making it a valuable compound for investigating therapeutic strategies for conditions like Alzheimer's disease, Parkinson's disease, and certain types of cancer. Additionally, its application extends to preclinical studies aimed at understanding the molecular mechanisms underlying these diseases, offering potential pathways for the development of new treatments.