MCAM and osteogenesis imperfecta: However, significantly lower endothelial progenitor cells (CD45-/CD34+/CD31+) were found in OI than in HC samples (p = 0.035), while early ASCs (CD45-/CD34+/CD73+/CD90+), hematopoietic cells (CD45+), monocytes (CD45+/CD14+/CD206-), macrophages (CD45+/CD14+/CD206+), and pericytes (CD45-/CD34-/CD146+) were similar between HC and OI patients (Table 2, Fig. 1).