The infection rate of adenovirus (Fig. 2D, E) and the protein expression of BMP9 (Fig. 2F) in C3H10T1/2 cells confirmed the effectiveness of adenovirus with different titers ((+): 2.5 × 107 PFU/mL; (++): 5 × 107 PFU/mL; (+++): 1 × 108 PFU/mL). This evidence concerns the gene GDF2 and infection.