CABLES1 (Cdk5 and Abl enzyme substrate 1) is an adaptor protein that regulates cyclin-dependent kinase (CDK) activity by enhancing tyrosine phosphorylation, particularly Y15 phosphorylation of CDK5 and CDK2 1. This modification increases CDK5 activity critical for neuronal development and decreases CDK2 activity, promoting growth inhibition 1. CABLES1 functions as a signaling hub by interacting with p53 family proteins, 14-3-3, and β-catenin, regulating cell cycle progression and cell death 1. Clinically, CABLES1 acts as a cell cycle negative regulator with tumor suppressor characteristics. It inhibits proliferation through p21-dependent pathways in endothelial cells 2 and is critical for hematopoietic stem cell quiescence and stress responses 3. In corticotrope cells, CABLES1 mediates glucocorticoid-induced growth inhibition; its loss in ~55% of Cushing disease adenomas correlates with glucocorticoid resistance and uncontrolled proliferation 4. CABLES1 expression is downregulated in type 2 diabetes and associated with metabolic dysregulation 56. Additionally, CABLES1 is regulated during temozolomide-induced dormancy in glioblastoma, linking it to stemness and cancer progression 7. CABLES1 transcription is altered by glucocorticoid signaling in brain 8, positioning it as a key mediator of stress response and metabolic adaptation.