Four-week-old male WT (Prom1+/+) and KO (Prom1-/-) mice were fed a high-fat diet for 8 weeks (Diet-Induced Obesity; DIO), and fasted for 4 hours before experiments. (F) DIO KO (Prom1-/-) mice were infected with an adenovirus harboring LacZ or Prom1 for 24 hours, fasted for 4 hours and intraperitoneally injected with glucagon (100 µg/kg body weight). Blood glucose levels (mg/dL) were measured 0, 15, 30, 60 and 120 minutes after glucagon stimulation (GST). Glucose disposal rates were measured using the pyruvate tolerance test (PTT) (n = 10 mice/group). 