medium level of significancep < 0.001
p < 0.05 was considered as the minimal level of significance, p < 0.01 was regarded as the medium level of significance, and p < 0.001 was indicated as the high level of significance. 3 Results 3.1 OB-EV Dex characterization and cellular internalization The EV Dex isolated from dexamethasone-stimulated OB cells were characterized for concentration and size distribution by NTA and TEM analysis.