Table 4. Relative expression levels of senescence-associated mRNA in each group of BMSCs ($\overline{X}\pm \text{s}$).

	n	TERT	TCAB1	P21	SIRT1	SIRT6
Young cell group	3	1.00 ± 0.04	1.01 ± 0.02	1.03 ± 0.03	1.00 ± 0.04	1.00 ± 0.09
Aged cell group	3	0.70 ± 0.03**	0.18 ± 0.01*	3.45 ± 0.48**	0.82 ± 0.02**	0.17 ± 0.02**
Induced aged group	3	0.05 ± 0.00**△△	0.35 ± 0.22	2.31 ± 0.09**	0.78 ± 0.12	0.43 ± 0.07**△△

Note: ^*Compared with the young cell group, P < 0.05, ^**compared with the young cell group, P < 0.01, △compared with the aged cell group, P < 0.05, and △△compared with the aged cell group, P < 0.01.