Table 1.

Surface epitope phenotype of bone marrow-, tonsil-, muscle-, and dental pulp-derived mesenchymal progenitor cells*

	BM-MPCs	T-MPCs	M-MPCs	DP-MPCs
CD14	-	-	-	-
CD34	-	-	-	-
CD45	-	-	-	-
CD73	+	+	+	+
CD90	+	+	+	+
CD105	+	+	+	+

*Surface epitopes or CD markers identified on the basis of immuoreactivity analyzed by fluorescence-activated cell sorting (FACS). FACS analysis showed that more than 95% of these cells were negative (-) for the expression of CD14, CD34, and CD45, and were positive (+) for CD73, CD90 and, CD105. Controls consisted of fluorescence observed with isotypic controls. BM, bone marrow; DP, dental pulp; M, muscle; MPC, mesenchymal progenitor cell; T, tonsil.