Fig 3

(A) All lines were differentiated using the spin EB method and sorted at D8 for CD38/TNAP double positive PGCLCs. Left: Flow cytometry results shown as dot plots, right: bar graphs with total PGCLC numbers derived. TS DND1^-/- hiPSCs resulted in similar ratios but reduced total numbers compared to DND1^+/+. CB hiPSCs differentiated less efficiently, and CB DND1^-/- #2 & #3 died during PGCLC induction, resulting in low total cell numbers and very few PGCLCs. CB DND1^-/- #1 showed efficient differentiation resulting in increased numbers of PGCLCs compared to CB DND1^+/+ (n = 3). (B) We verified the results with TS DND1^+/+ and TS DND1^-/- #1 after aggregation in 96 well plates using staining against CD38/TNAP, OCT4/SOX17 and OCT4/NANOG. All three marker combinations resulted in reduced ratios and absolute numbers of PGCLCs in TS DND1^-/- #1 compared to wildtype iPSCs. (C) We measured aggregate sizes (visible area) in D1 and D8 aggregates and found that DND1^-/- #1 iPSCs aggregates were bigger compared to the control (n = 3 experiments, with 10 aggregates measured per cell line and experiment). Difference on D8 is significant with * p< 0.01 tested with pairwise t-tests. (D) When we analysed the total cell numbers derived per experiment, TS DND1^-/- #1 showed higher total cell numbers while PGCLCs were reduced (n = 10 experiments). Differences in total and PGCLC number did not reach statistical significance between WT and KO cells (pairwise t-test with p<0.05).