GCG and osteosarcoma: when GLP2 was overexpressed, the weight of orthotopic osteosarcoma decreased approximately 3-fold when compared to the corresponding control group (0.586 ± 0.137 g versus 0.192 ± 0.06 g; p = 0.000002 < 0.01) (Figure S2A), and the tumor formation time of the rLV group (7.2 ± 1.39 days) was shorter than that of the rLV-GLP2 group (13 ± 2.67 days; p = 0.00008 < 0.01) (Figure S2B).