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Figure 2 | Arthritis Research & Therapy

Figure 2

From: Direct transplantation of mesenchymal stem cells into the knee joints of Hartley strain guinea pigs with spontaneous osteoarthritis

Figure 2

Macroscopic findings. Macroscopic photographs (bird's-eye view) of the articular surface of the tibial plateau 5 weeks after injection of each reagent in Hartley strain guinea pigs, stained with India ink: (A) PBS group, (B) hyaluronic acid (HA) group, (C) PBS + mesenchymal stem cell (MSC) group, (D) HA + MSC group. Arrowheads: stained lesions. (E) Macroscopic osteoarthritis (OA) scores in the same animal groups evaluated 5 weeks after injection. Data are mean ± standard deviation of five guinea pigs in each group. *P < 0.05.

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