Moreover, infection of shPTGR1 into 95D cells resulted in a remarkable increase in the sub-G1 phase (0.45%  ±  0.08% versus 0.16%  ±  0.04%, p < 0.05, Figure 4(c)), suggesting that knockdown of PTGR1 could induce cell apoptosis. This evidence concerns the gene PTGR1 and infection.