Figure 5From: Direct transplantation of mesenchymal stem cells into the knee joints of Hartley strain guinea pigs with spontaneous osteoarthritisFluorescent microscopic findings. Fluorescent microscopy for in vivo tracing of injected mesenchymal stem cells (MSCs) at 1, 3, and 5 weeks. (A to C) PBS + MSC group. (D to F) Hyaluronic acid (HA) + MSC group. Bar = 50 μm. (G) Quantification of the carboxyfluorescein diacetate succinimidyl ester (CFDA-SE)-labeled MSCs. Data are mean ± standard deviation of five guinea pigs in each group. *P < 0.05.Back to article page