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Angiogenic proteins expression stimulated by hydrogel at day 7. (A) Representative images of immunofluorescence staining of CD31 (scale bar: 20µm); (B) Quantification data of newly-formed vessels at day 7; (C) Western blood results of HIF-1α, VEGF-A, VEGF R2 in different groups; (D-F) quantification results of HIF-1α (D), VEGF-A (E), VEGF R2 (F) protein levels at different groups. (*p<0.05 and **p<0.01.)
