A Modular Platform for Differentiation of Human PSCs into All Major Ectodermal Lineages
Open accessAbstract
Directing the fate of human pluripotent stem cells (hPSCs) into different lineages requires variable starting conditions and components with undefined activities, introducing inconsistencies that confound reproducibility and assessment of specific perturbations. Here we introduce a simple, modular protocol for deriving the four main ectodermal lineages from hPSCs. By precisely varying FGF, BMP, WNT, and TGFβ pathway activity in a minimal, chemically defined medium, we show parallel, robust, and reproducible derivation of neuroectoderm, neural crest (NC), cranial placode (CP), and non-neural ectoderm in multiple hPSC lines, on different substrates independently of cell density. We highlight the utility of this system by interrogating the role of TFAP2 transcription factors in ectodermal differentiation, revealing the importance of TFAP2A in NC and CP specification, and performing a small-molecule screen that identified compounds that further enhance CP differentiation. This platform provides a simple stage for systematic derivation of the entire range of ectodermal cell types.
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Within the neuro-glial group, PAX6+HES5+ neuroectoderm-like cells clustered near PLP1+SOX10+PAX3+ CNCC-like cells, suggesting that CNCC arise from a neuroectoderm intermediate.
“Within the neuro-glial group, PAX6+HES5+ neuroectoderm-like cells clustered near PLP1+SOX10+PAX3+ CNCC-like cells (Fig. 2d), suggesting that CNCC arise from a neuroectoderm intermediate11.”
From Hair-bearing human skin generated entirely from pluripotent stem cells (2020) · cites this paper as [11]
In Results, “Expression analysis of purified cell types from the ectoderm” (page unavailable), the paper reports that neuroectoderm clustered near hESCs, whereas neural crest clustered near cranial placode—not neuroectoderm. It treats neuroectoderm and neural crest as distinct lineages and does not infer that cranial neural crest arises through a neuroectoderm intermediate. (LLM, conf=0.82)
Checked by a reasoning model — may be wrong.
Experimental — accuracy not yet measuredThe largest group, epithelial cells, consisted of EPCAM+TFAP2A+ cells expressing markers of nascent surface ectoderm (HAND1+), epidermal progenitors (WNT6+TP63+), and anterior (SIX1+PAX6+DLX5+) and posterior (SIX1+PAX8+GBX2+) cranial placodes.
“The largest group, epithelial cells, consisted of EPCAM+TFAP2A+ cells expressing markers of nascent surface ectoderm (HAND1+), epidermal progenitors (WNT6+TP63+), and anterior (SIX1+PAX6+DLX5+) and posterior (SIX1+PAX8+GBX2+) cranial placodes (Fig. 2a–d, Extended Data Fig. 5)11,20.”
From Hair-bearing human skin generated entirely from pluripotent stem cells (2020) · cites this paper as [11]
The Results sections on ectodermal marker expression and BMP signaling identify HAND1 with non-neural ectoderm and SIX1/PAX6 with anterior placode cells (page numbers unavailable). They do not establish that epithelial cells were the largest group or report the claimed EPCAM/TFAP2A co-expression and full marker combinations for epidermal progenitors and anterior and posterior placodes. (LLM, conf=0.86)
Experimental — accuracy not yet measuredTo successfully generate skin, co-development of epidermis and dermis is required, and precise alterations of major signaling pathways (TGF-β, BMP4, and bFGF) are critical.
“To successfully generate skin, co-development of epidermis and dermis is required, and precise alterations of major signaling pathways (TGF-β, BMP4, and bFGF) are critical”
From Generation and characterization of hair-bearing skin organoids from human pluripotent stem cells (2022) · cites this paper as [72]
The Results section ('BMP signaling through TFAP2A is necessary to generate non-CNS fates'; page unavailable) reports dose-dependent BMP4 induction, FGF-pathway inhibition, and differentiation into epidermal cells. The Method Details describe a keratinocyte protocol using BMP4 and signaling inhibitors. These passages support signaling control of epidermal differentiation, but they do not establish that epidermis and dermis must co-develop to generate skin, or that the specified TGF-β, BMP4, and bFGF alterations are critical for that outcome. (LLM, conf=0.88)
Experimental — accuracy not yet measuredBMP activation promotes surface ectoderm induction and suppresses neuroectoderm induction.
“TGFβ inhibition promotes ectoderm induction from pluripotent stem cells, whereas BMP activation promotes surface ectoderm (alternatively, non-neural ectoderm) induction and suppresses neuroectoderm induction9–12.”
From Hair-bearing human skin generated entirely from pluripotent stem cells (2020) · cites this paper as [11]
TGFβ inhibition promotes ectoderm induction from pluripotent stem cells.
“TGFβ inhibition promotes ectoderm induction from pluripotent stem cells, whereas BMP activation promotes surface ectoderm (alternatively, non-neural ectoderm) induction and suppresses neuroectoderm induction9–12.”
From Hair-bearing human skin generated entirely from pluripotent stem cells (2020) · cites this paper as [11]
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- Authors
- Tchieu, J., Zimmer, B., Fattahi, F., Amin, S., Zeltner, N., Chen, S., & Studer, L.
- Affiliations
- Cornell University (US)
- Corresponding author
- Studer, Lorenz
- ORCID
- Venue
- Cell Stem Cell
- Publisher
- Elsevier BV
- Published
- 2017-09
- Volume
- 21
- Issue
- 3
- Pages
- 399-410.e7
- ISSN
- 1875-9777 (ISSN-L)
- 1934-5909
- PMC
- PMC5737635
- OpenAlex
- W2751596777
- Cited by
- 235
- References
- 37
- Citations by year
- 2026: 27 · 2025: 33 · 2024: 34 · 2023: 26 · 2022: 25 · 2021: 29 · 2020: 26 · 2019: 25 · 2018: 9 · 2017: 1
- FWCI
- 6.64
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Cell stem cell (publishedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- Funders
- Tri-I Starr Stem Cell Scholars postdoctoral training fellowship
- NYSTEM postdoctoral training fellowship
- Swiss National Science Foundation
- Starr Foundation (2014-001)
- NYSTEM (C026446)
- NINDS/NIH (R01NS072381)
- NCI/NIH center core (P30CA008748)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Pluripotent Stem Cells Research
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
- Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
- Keywords
- human pluripotent stem cells, ectoderm differentiation, neuroectoderm, neural crest, cranial placodes, chemically defined medium, FGF signaling, BMP signaling, Wnt signaling, TGF-beta signaling, TFAP2A, small molecule screening
- MeSH terms
- Cell Differentiation, Ectoderm, Humans, Neural Crest, Phenanthrolines, Signal Transduction, Gene Expression Regulation, Developmental, Cell Lineage, Bone Morphogenetic Proteins, Pluripotent Stem Cells, Transcription Factor AP-2, Neural Plate, Small Molecule Libraries, Neural Stem Cells
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