Fig. 1A–D.

MSCs were isolated in culture from periarticular adipose tissue. After the third passage, cells in culture were analyzed with phenotypic immunostaining. The diagram shows that relatively pure populations of (A) CD90/105 positive, (B) CD90 positive, CD14 negative, (C) CD90 positive, CD34 negative, and (D) CD90 positive, CD45 negative cells were isolated, which is consistent with the MSC phenotype.