The DOI matches its Crossref record; 28 of the 28 references it cites were found in a registry or an index.
Activin A Maintains Pluripotency of Human Embryonic Stem Cells in the Absence of Feeder Layers
Open accessAbstract
To date, all human embryonic stem cells (hESCs) available for research require unidentified soluble factors secreted from feeder layers to maintain the undifferentiated state and pluripotency. Activation of STAT3 by leukemia inhibitory factor is required to maintain "stemness" in mouse embryonic stem cells, but not in hESCs, suggesting the existence of alternate signaling pathways for self-renewal and pluripotency in human cells. Here we show that activin A is secreted by mouse embryonic feeder layers (mEFs) and that culture medium enriched with activin A is capable of maintaining hESCs in the undifferentiated state for >20 passages without the need for feeder layers, conditioned medium from mEFs, or STAT3 activation. hESCs retained both normal karyotype and markers of undifferentiated cells, including Oct-4, nanog, and TRA-1-60 and remained pluripotent, as shown by the in vivo formation of teratomas.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
Embryonic Stem Cell Lines Derived from Human Blastocysts
Thomson, J. A., Itskovitz-Eldor, J., Shapiro, S. S., Waknitz, M. A., Swiergiel, J. J., Marshall, V. S., & Jones, J. M. (1998) · Science · doi:10.1126/science.282.5391.1145 · Cited by 15,926
Embryonic stem cell lines from human blastocysts: somatic differentiation in vitro
Reubinoff, B. E., Pera, M. F., Fong, C.-Y., Trounson, A., & Bongso, A. (2000) · Nature Biotechnology · doi:10.1038/74447 · Cited by 2,706
Ying, Q.-L., Nichols, J., Chambers, I., & Smith, A. (2003) · Cell · doi:10.1016/s0092-8674(03)00847-x · Cited by 2,122
Sato, N., Meijer, L., Skaltsounis, L., Greengard, P., & Brivanlou, A. H. (2004) · Nature Medicine · doi:10.1038/nm979 · Cited by 2,109
Feeder-free growth of undifferentiated human embryonic stem cells
Xu, C., Inokuma, M. S., Denham, J., Golds, K., Kundu, P., Gold, J. D., & Carpenter, M. K. (2001) · Nature Biotechnology · doi:10.1038/nbt1001-971 · Cited by 1,870
Purification and characterization of an FSH releasing protein from porcine ovarian follicular fluid
Vale, W., Rivier, J., Vaughan, J., McClintock, R., Corrigan, A., Woo, W., Karr, D., & Spiess, J. (1986) · Nature · doi:10.1038/321776a0 · Cited by 1,154
Schuldiner, M., Yanuka, O., Itskovitz-Eldor, J., Melton, D. A., & Benvenisty, N. (2000) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.97.21.11307 · Cited by 1,134
BMP4 initiates human embryonic stem cell differentiation to trophoblast
Xu, R.-H., Chen, X., Li, D. S., Li, R., Addicks, G. C., Glennon, C., Zwaka, T. P., & Thomson, J. A. (2002) · Nature Biotechnology · doi:10.1038/nbt761 · Cited by 1,128
Derivation of Embryonic Stem-Cell Lines from Human Blastocysts
Cowan, C. A., Klimanskaya, I., McMahon, J., Atienza, J., Witmyer, J., Zucker, J. P., Wang, S., Morton, C. C., McMahon, A. P., Powers, D., et al. (2004) · New England Journal of Medicine · doi:10.1056/nejmsr040330 · Cited by 964
Richards, M., Fong, C.-Y., Chan, W.-K., Wong, P.-C., & Bongso, A. (2002) · Nature Biotechnology · doi:10.1038/nbt726 · Cited by 729
Cited by
Efficient differentiation of human embryonic stem cells to definitive endoderm
D'Amour, K. A., Agulnick, A. D., Eliazer, S., Kelly, O. G., Kroon, E., & Baetge, E. E. (2005) · Nature Biotechnology · doi:10.1038/nbt1163 · Cited by 1,730
TGF-β and the TGF-β family: context-dependent roles in cell and tissue physiology
Morikawa, M., Derynck, R., & Miyazono, K. (2016) · Cold Spring Harbor Perspectives in Biology · doi:10.1101/cshperspect.a021873 · Cited by 1,321
Feeder-independent culture of human embryonic stem cells
Ludwig, T. E., Bergendahl, V., Levenstein, M. E., Yu, J., Probasco, M. D., & Thomson, J. A. (2006) · Nature Methods · doi:10.1038/nmeth902 · Cited by 681
Xiao, L., Yuan, X., & Sharkis, S. J. (2006) · Stem Cells · doi:10.1634/stemcells.2005-0299 · Cited by 353
Yu, J., & Thomson, J. A. (2008) · Genes & Development · doi:10.1101/gad.1689808 · Cited by 342
Metadata
- Authors
- Beattie, G. M., Lopez, A. D., Bucay, N., Hinton, A., Firpo, M. T., King, C. C., & Hayek, A.
- Venue
- STEM CELLS
- Publisher
- Oxford University Press (OUP)
- Published
- 2005-04
- Volume
- 23
- Issue
- 4
- Pages
- 489-495
- ISSN
- 1066-5099 (ISSN-L)
- 1549-4918
- OpenAlex
- W2160266371
- Cited by
- 503
- References
- 28
- FWCI
- 17.63
- Type
- journal article
- Language
- en
- Open access
- bronze
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: Activin A Maintains Pluripotency of Human Embryonic Stem Cells in the Absence of Feeder Layers. https://app.cochat.ai/papers/10.1634/stemcells.2004-0279
- The paper
- Beattie, G. M., Lopez, A. D., Bucay, N., Hinton, A., Firpo, M. T., King, C. C., & Hayek, A. (2005). Activin A Maintains Pluripotency of Human Embryonic Stem Cells in the Absence of Feeder Layers. STEM CELLS. https://doi.org/10.1634/stemcells.2004-0279
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.