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. 2021 Nov 27;12:100171. doi: 10.1016/j.mtbio.2021.100171

Fig. 6.

Fig. 6

EVs/RGD-biotin hydrogels enhanced the retention and stability of HIF-1α-EVs. (A) Chemical structure of the RGD-biotin molecule. (B) SEM image of RGD-biotin hydrogel revealed the formation of entangled nanofibers formed by the RGD-biotin molecule. (C) Biotin-GFFYGRGD was dissolved in PBS. After that, the suspension was heated to about 95 ​°C in order to dissolve the compound completely, and hydrogels formed after cooling back to room temperature. (D) EVs were incorporated in Biotin-GFFYGRGD and then injected into infarcted rat hearts. (E) The fate of EVs in vivo was tracked by bioluminescence imaging. Representative images are from rats receiving EVs incorporated in RGD hydrogels (EV/RGD-biotin) and naked EVs. (F) Quantification of bioluminescence imaging after injection. Continuous variables were described by means ​± ​SEM. n=3 for each group.