Fig 1. Characterization of primary cell culture derived from placenta for MSC origin.

(A) RT-PCR analysis for expression of typical MSC markers: cells provide a signal for CD90, CD73, and CD105 MSC while being negative for CD34 hematopoietic marker. (B) Minus RT control for RT-PCR. (C,D) Cells display strong signals for CD73 and CD105 in flow cytometry analysis.

(A) 逆转录聚合酶链反应（Reverse Transcription Polymerase Chain Reaction, RT-PCR）分析典型间充质干细胞（Mesenchymal Stem Cells, MSC）标志物的表达：细胞对CD90、CD73及CD105呈阳性信号，而对造血标志物CD34呈阴性表达。(B) 该RT-PCR的无反转录对照。(C、D) 流式细胞术（Flow Cytometry）分析显示，细胞对CD73与CD105呈现强阳性信号。