Figure 4.
NIS-expressing human induced pluripotent stem cell (iPSC) lines showed slower proliferation in differentiation medium than NIS non-expressing human iPSC lines did. Sodium iodide (NaI) rescued poor proliferation of NIS-expressing cells. (A) NIS-expressing human iPSCs grew as well as NIS non-expressing human iPSCs in Essential 8 Flex Medium (maintenance medium for human pluripotent stem cells). Cells were cultured in Essential 8 Flex Medium for 4 days with or without NaI, and nuclei (blue) and F-actin (red) were stained. Scale bars are 1 mm. (B) Cell area/surface area was measured (N = 3 in each). *p < 0.001 (ANOVA/Bonferroni). (C) Cells were cultured with RPMI/B27 medium (basal medium for differentiation) for 4 days with or without NaI, and nuclei (blue) and F-actin (red) were stained. Scale bars are 1 mm. (D) Cell area/surface area was measured (N = 3 in each, Student-t test). (E) Cell counts were evaluated by MTT assay (N = 6 in each). *p < 0.01, **p < 0.001 vs. NIS (+) w/o NaI (ANOVA/Bonferroni).
