Table 2. Mean percentage of proliferation of healthy donor peripheral blood mononuclear cells (PBMCs) stimulated with PHA in the presence of HD-MSCs, as compared with ALL-MSCs generated at day+0; +15; +33; +78 at two different MSC∶PBMC ratios (1∶2; 1∶10).

	PBMC proliferation	P value	PBMC proliferation	P value
	Ratio 1∶2		Ratio 1∶10
HD-MSCs	6.19 (SD ±2.55)	-	31.71 (SD ±13.49)	-
ALL-MSCs d+0	9.85 (SD ±3.50)	0.38	42.24 (SD ±17.93)	0.31
ALL-MSCs d+15	8.64 (SD ±4.82)	0.42	34.07 (SD ±14.50)	0.46
ALL-MSCs d+33	10.66 (SD ±6.12)	0.36	40.85 (SD ±15.23)	0.34
ALL-MSCs d+78	11.84 (SD ±5.12)	0.33	36.61 (SD ±14.58)	0.41

Each value represents the mean ± SD of multiple experiments (each point being in triplicate). PBMC proliferation stimulated with PHA in the absence of MSCs was 71.80%. P values less than 0.05 were considered to be statistically significant.