ADCY8 (adenylate cyclase 8) is a calcium-stimulated enzyme that catalyzes ATP conversion to cyclic AMP (cAMP), serving as a critical regulator of multiple physiological processes. In glucose homeostasis, ADCY8 is essential for glucose-induced insulin secretion in pancreatic beta cells and maintains glucose tolerance, with knockout mice showing impaired insulin secretion and glucose intolerance 1. The enzyme also regulates adipose tissue metabolism by controlling lipolysis through the cAMP-PKA signaling pathway, with deficiency contributing to increased obesity and impaired fat breakdown 2. In the nervous system, ADCY8 plays important roles in cognitive function and behavior, with genetic variants associated with bipolar disorder and avoidance behavior in mice 3. The gene shows genetic association with human cognitive performance measures, suggesting involvement in learning and memory processes 4. In cardiac tissue, overexpression of ADCY8 triggers adaptive responses that enhance heart performance without pathological hypertrophy, engaging stress-protective mechanisms 5. Additionally, ADCY8 promoter methylation serves as a biomarker for cervical cancer progression, with hypermethylation correlating with high-grade cytological changes 67. ADCY8 polymorphisms are also implicated in PTSD susceptibility 8. Through cAMP signaling, ADCY8 integrates calcium and hormonal signals across multiple organ systems.