Fig. 3From: Decellularized nucleus pulposus matrix/chitosan hybrid hydrogel combined with nucleus pulposus stem cells and GDF5-loaded microspheres for intervertebral disc degeneration preventionGDF-5 can be slowly released into the composite hydrogel. (A) SEM image of GDF5-loaded microspheres. (B) Measurement of microsphere diameter. (C) Release detection of GDF-5 in vitro. (D) Degradation detection of GDF5-loaded microspheres in vitro. (n ≥ 3)Back to article page