Figure 4From: Intradiscal transplantation of synovial mesenchymal stem cells prevents intervertebral disc degeneration through suppression of matrix metalloproteinase-related genes in nucleus pulposus cells in rabbitsIntradiscally injected MSCs maintain microstructure of nucleus pulpous. (a) Macroscopic views of the sagittal section of intervertebral discs at two weeks after operation. (b) Sagittal sections with Hematoxylin-Eosin (HE) staining after operation. (c) Higher magnification of the framed area with type II collagen immunostaining.Back to article page