Skin fibroblasts were reprogrammed to iPSCs using non‐integrative episomal vectors expressing Oct4, Sox2, Klf4, c‐myc, p53shRNA, and Lin28, as previously described (Kuebler et al, 2017 (link)) to generate 2–4 independent iPSCs clones per individual. THD patient‐specific and control iPSCs were maintained in mTeSR™ medium (STEMCELL technologies) and passaged once a week with EDTA onto Matrigel‐coated (Cultek) plates (Life technologies). The absence of episomal expression and endogenous pluripotency markers was evaluated as previously reported (Kuebler et al, 2017 (link)). In vitro differentiation toward the endoderm, mesoderm, and neuroectoderm was performed essentially as described (Martí et al, 2013 (link)). The iPSCs generated and characterized in this study were registered and deposited with the Spanish Bank of Stem Cells. Information on iPSC lines is provided in Table 1.
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