Release
of IL-4 initially loaded in the gelatin/HA-tyr film to
the hydrogel with THP-1 encapsulated in the hydrogel. (A) Metabolic
activity of encapsulated THP-1 in gelatin hydrogel with and without
IL-4 release from the film. (B, C) Confocal images of THP-1 encapsulated
in the hydrogel by DAPI (blue) staining after 21 days with and without
IL-4 release. (D) Results of real-time PCR analysis of M1 markers
for 3D encapsulated THP-1 cells without or with IL-4 release. The
M1 markers are as follows: CD86, IL-6, STAT1, and TNF-α. (E,
F) Confocal images of THP-1 encapsulated in the hydrogel with the
M1 marker, CD80 (red), and the M2 marker, CD206 (green) and DAPI (blue).