Table 3. Flow cytometry analysis of surface antigens in 293T cells before and after senescence induction ($\overline{X}\pm \text{s}$, n = 3).

Surface antigens	Groups	Positive cell rate(%)	P-value
CD14	Normal group	78.8 ± 0.8	0.089
	Induction group	76.3 ± 1.7
CD29	Normal group	88.3 ± 1.1	0.009
	Induction group**	84.5 ± 0.9
CD90	Normal group	75.5 ± 1.0	0.078
	Induction group	72.7 ± 1.8
CD73	Normal group	4.55 ± 0.53	0.010
	Induction group*	2.77 ± 0.42
CD105	Normal group	83.2 ± 2.1	0.008
	Induction group**	68.4 ± 4.8
HLA-ABC	Normal group	1.12 ± 0.04	<0.001
	Induction group**	0.19 ± 0.02

Note: ^*Compared with the normal group, P < 0.05, and ^** compared with the normal group, P < 0.01 (n=3).