Collagen/Gelatin Sponges (CGSs) Provide Both Protection and Release of bFGF: An In Vitro Study

Figure 5

Confocal fluorescence microphotographs and SEM images. (a) Confocal fluorescence microphotographs of 6 representative samples. Phalloidin (red)/Hoechst (blue). (b) SEM images. CGS indicates that bFGF was added to CGS. L indicates that bFGF was added to small tubes and kept under the same conditions. Control samples: P4, DMEM + 0.1% FBS. In Supplementary Figure 2 the images for all the samples are reported. Scale bar is 50 μm. White arrowheads indicate the CGS.

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