PKA RI-α also known as PKA I alpha reg, Prkar1alpha, PRKAR1A is a tissue-specific regulator that downregulates the expression of several liver genes, which is vital for maintaining metabolic homeostasis and preventing aberrant cell growth. This regulatory function is particularly important in liver health, as dysregulation can lead to conditions such as hepatocellular carcinoma. PKA RI-α protein′s ability to modulate gene expression in response to cyclic AMP (cAMP) signaling highlights its significance in various physiological processes, including proliferation and metabolism. Notably, functional null mutations in the gene encoding PKA RI-α are linked to Carney complex, an autosomal dominant syndrome characterized by multiple neoplasms, including cardiac myxomas and endocrine tumors, underscoring PKA RI-α protein′s importance in tumor suppression and overall cellular regulation.