Fig. 4From: Comparison and characterization of enriched mesenchymal stem cells obtained by the repeated filtration of autologous bone marrow through porous biomaterialsObservation of cellular components in the composite material after filtration. A–D After filtration, the composite material was incubated for 4 h and then subjected to electron microscopy. Spheroid WBCs (black arrow, A), disc-shaped RBCs (red arrow, A), activated PLs (B) with protruding pseudopods, and MSCs (C) were observed. D–G After 2 weeks of culture, electron microscopy (D) and confocal microscopy (E–G) showed that the cells were widely distributed and fully spread in the materialBack to article page