Table 2.

Concentration and size distribution of exosomes

Sample ID	Exosome concentration (xE10/mL)	Particle size mean (nm)	Type of sample
C248	17.5 +/−  0.9	120.9 +/− 2.1	C2 cells culture medium, 48 h incubation
C272	12.8 +/−  1.7	118.0 +/−  4.5	C2 cells culture medium, 72 h incubation
FB48	6.4 +/−  0.7	110.3 +/−  5.0	Primary FBs culture medium, 48 h incubation
FB72	7.3 +/−  1.5	129.0 +/− 7.4	Primary FBs culture medium, 72 h incubation

Culture medium-derived exosomes from C2 cell line and primary fibroblasts, after 48 and 72 h of incubation under exosome-free media conditions (mean +/− standard error)