Journal: Biomedicines
Article Title: Growth Factor-Primed WJ-MSC Secretome Enhances Fibroblast Expansion In Vitro
doi: 10.3390/biomedicines13122863
Figure Lengend Snippet: Analysis of cytotoxicity, metabolic activity, and proliferation in human dermal fibroblasts cultured with the secretome of WJ-MSCs. ( a ) Live and dead assay. Calcein green fluorescent stain shows live cells, and ethidium homodimer red fluorescent stain denotes dead cells. ( b ) Prestoblue colorimetric assay. Metabolic activity was measured at 24, 72, and 168 h. At 24 h, S1.25 did not differ significantly from FBS or GFs controls, whereas 1.25, 6.25, and S6.25 were significantly lower (* p < 0.03, ** p < 0.01, and *** p < 0.008). At 72 h, S1.25 remained comparable to FBS but differed from GFs ( p < 0.04) and from 1.25, 6.25, and S6.25 ( p < 0.03). After 168 h, FBS showed the highest cell density, significantly exceeding that of all groups. ( c ) Histograms of CFSE in human fibroblasts with different concentrations of WJ-MSC secretome obtained from cells stimulated and unstimulated with FGF-EGF. ( c’ ) MIF graphic of CFSE. The graphic shows that FBS has lower MIF levels, indicating more cell divisions. GFs and S1.25 exhibited similar patterns in their MIF. * p < 0.04 and ** p < 0.01). n = 3 independent experiments, each performed in triplicate. Bars = 50 μm.
Article Snippet: Human fibroblasts (2 × 10 5 ) were cultured in T25 flasks with DMEM supplemented with 10% FBS and 1% antibiotic (penicillin, streptomycin and amphotericin B, Gibco, Waltham, MA, USA) and exposed either to secretome from stimulated WJ-MSCs (1.25 or 6.25 mg/mL), secretome from unstimulated WJ-MSCs (S1.25 or S6.25 mg/mL), or to exogenous GFs (EGF and FGF).
Techniques: Activity Assay, Cell Culture, Staining, Colorimetric Assay