Evidence map›Paper›PMID 24913278›Full record

ArticleStem cell reviews and reports2014

The generation of definitive endoderm from human embryonic stem cells is initially independent from activin A but requires canonical Wnt-signaling.

Ortwin Naujok, Ulf Diekmann, Sigurd Lenzen

Abstract read
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In one paragraph

Article in Stem cell reviews and reports, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed
3.0field-weighted citation impact, top 8% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

33 citing papers in PubMed, 91 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors at 1 institution in 1 country.

Ortwin NaujokInstitute of Clinical Biochemistry, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Lower Saxony, Germany, naujok.ortwin@mh-hannover.de.
Ulf Diekmann
Sigurd Lenzen
Medizinische Hochschule Hannover · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The activation of the TGF-beta pathway by activin A directs ES cells into the definitive endoderm germ layer. However, there is evidence that activin A/TGF-beta is not solely responsible for differentiation into definitive endoderm. GSK3beta inhibition has recently been shown to generate definitive endoderm-like cells from human ES cells via activation of the canonical Wnt-pathway. The GSK3beta inhibitor CHIR-99021 has been reported to generate mesoderm from human iPS cells. Thus, the specific role of the GSK3beta inhibitor CHIR-99021 was analyzed during the differentiation of human ES cells and compared against a classic endoderm differentiation protocol. At high concentrations of CHIR-99021, the cells were directed towards mesodermal cell fates, while low concentrations permitted mesodermal and endodermal differentiation. Finally, the analyses revealed that GSK3beta inhibition rapidly directed human ES cells into a primitive streak-like cell type independently from the TGF-beta pathway with mesoderm and endoderm differentiation potential. Addition of low activin A concentrations effectively differentiated these primitive streak-like cells into definitive endoderm. Thus, the in vitro differentiation of human ES cells into definitive endoderm is initially independent from the activin A/TGF-beta pathway but requires high canonical Wnt-signaling activity.

Indexed as

ActivinsBlotting, WesternCell DifferentiationCells, CulturedEmbryonic Stem CellsEndodermFlow CytometryGlycogen Synthase Kinase 3HumansImmunoenzyme TechniquesMesodermPancreasPyridinesPyrimidinesReal-Time Polymerase Chain ReactionReverse Transcriptase Polymerase Chain Reactionactivin AActivinsChir 99021Glycogen Synthase Kinase 3PyridinesPyrimidinesRNA, MessengerTransforming Growth Factor betaWnt Proteins

Identifiers

PMID24913278
OpenAlexW2059526735

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.