Type 2 diabetes is marked by insulin resistance coupled with insufficient insulin secretion due to early β-cell dysfunction and progressive loss of β-cell mass. Pdx1 and MafA, critical for maintaining β-cell function, are progressively reduced under metabolic stress and in patients, driving disease progression. Researchers at the University of Pittsburgh have reported efficacy data demonstrating successful pancreatic delivery of GPX-002, an AAV-Pdx1/MafA construct, in HFD mice.