MEDAG (mesenteric estrogen dependent adipogenesis) is a multifunctional protein that plays critical roles in metabolic regulation and disease pathogenesis. Its primary function involves promoting adipocyte differentiation and lipid metabolism, where it functions as an A-kinase-anchoring protein (AKAP) that directly regulates protein kinase A (PKA) activity through negative feedback mechanisms 1. MEDAG interacts with the PKA-RIIβ subunit to prevent PKA hyperactivation and maintain metabolic homeostasis 1. The protein is significantly involved in glucose metabolism, with elevated expression correlating with hemoglobin A1c levels and being overexpressed in pancreatic islet tissue of type 2 diabetes patients 2. MEDAG also functions as an oncogene in multiple cancer types, promoting tumor progression through the AKT/AMPK/mTOR pathway 3. In breast cancer, high glucose conditions upregulate MEDAG expression, which suppresses autophagy via AMPK inhibition, leading to enhanced tumor progression and reduced chemotherapy sensitivity 4. Additionally, MEDAG expression is associated with poor prognosis in papillary thyroid microcarcinoma and correlates with lymph node metastasis 5. In normal breast tissue, MEDAG expression correlates with body mass index, suggesting its involvement in obesity-related inflammatory processes 6.