Figure 2. Nontransgenic cardiac stem cells express tagged fluorescent marker proteins upon transfection with plasmid constructs under the control of the αMHC promoter.
Nontransgenic cardiac stem cells were cultured in growth media, transfected with plasmid constructs, allowed to express for 48 h and fixed. (A) CMV-Td-Tomato-Flag construct (left). Cells were transfected with a Tomato-Flag construct under the viral CMV promoter as a control and stained with c-kit or Flag-tag (green) and Topro (blue), td-Tomato protein fluorescence (red) (right). (B) αMHC-YFP-HA construct (left). Cells were transfected with a YFP-HA construct under the αMHC promoter and stained with c-kit or HA (red), Topro (blue) and YFP fluorescence (green) (right). (C) Diagram of αMHC-GFP construct (left). Cells were transfected with a GFP construct under control of the αMHC promoter and stained with c-kit (red), Topro (blue) and GFP protein fluorescence (green) (right). Scale bar is 40 μm.
CMV: Cytomegalovirus; eGFP: Enhanced Green fluorescent protein; MHC: Myosin heavy chain; YFP: Yellow fluorescent protein.