Figure 2. Mesodermal SALL1 expression promotes cardiac fate but its continued expression in CPCs suppresses cardiac differentiation.
(A) DOX-inducible SALL1 construct and strategy for temporal SALL1 overexpression in human PSCs (Sall1-TGhiPSc). (B, C) mCherry (B) or SALL1 (C) expression with/without DOX (after 12 hrs, 1d). This level of SALL1 expression is about six-fold higher than endogenous levels (Fig. S2B), which may be appropriate for the assay. Scale bars: 200μm. (D) Relative expression of cardiac transcription factors and myocardial genes after temporal DOX treatment shown in (A). (E) Flow cytometry analysis showing percentages of cTNT/TNI/KDR positive cells after temporal DOX treatment shown in (A).