Adenosine deaminase acting on RNA (ADAR) is the enzyme responsible for adenosine-to-inosine (A-to-I) RNA editing, a process essential for regulating how cells respond to double-stranded RNA. ADAR1 generates two isoforms, p150 and p110, with distinct roles in cancer biology. Researchers from the Wistar Institute of Anatomy & Biology reported the preclinical characterization of ADAR1-i-124, an ADAR1 inhibitor designed for the treatment of cancer.