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. 2019 Apr 2;10:663. doi: 10.3389/fimmu.2019.00663

Figure 2.

Figure 2

The two possible outcomes of subcutaneous implantation of mesenchymal stem cells on calcium phosphate ceramic in mice. Histology of the implants: TRAP staining for osteoclasts detection after 4 weeks and Masson's trichrome to evaluate bone formation after 8 weeks. On the left, chronic inflammation (o) with formation of TRAP negative MNGCs followed by fibrous encapsulation and no sign of bone formation. On the right, osteoclastogenesis on the biomaterial followed by abundant bone formation (*). NK, natural killer; BCP, biphasic calcium phosphate; MNGC, multi-nucleated giant cell; OC, osteoclast; OBs, osteoblasts; TRAP, tartrate-resistant acid phosphatase.