Cited by 54Pluripotent Stem Cells ResearchDevelopmental Biology and Gene RegulationMesenchymal stem cell research

Heat Shock 70‐kDa Protein 8 Isoform 1 Is Expressed on the Surface of Human Embryonic Stem Cells and Downregulated upon Differentiation

Son, Yeon Sung, Park, Jae Hyun, Kang, Young Kook, Park, Jin‐Sung, Choi, Hong Seo, Lim, Ji Young, Lee, Jeoung Eun, Lee, Jung Bok +9 more·2005·STEM CELLS

Abstract

The cell-surface markers used routinely to define the undifferentiated state and pluripotency of human embryonic stem cells (hESCs) are those used in mouse embryonic stem cells (mESCs) because of a lack of markers directly originated from hESC itself. To identify more hESC-specific cell-surface markers, we generated a panel of monoclonal antibodies (MAbs) by immunizing the irradiated cell clumps of hESC line Miz-hES1, and selected 26 MAbs that were able to bind to Miz-hES1 cells but not to mESCs, mouse embryonic fibroblast cells, and STO cells. Most antibodies did not bind to human neural progenitor cells derived from the Miz-hES1 cells, either. Of these, MAb 20-202S (IgG1, kappa) immunoprecipitated a cell-surface protein of 72-kDa from the lysate of biotin-labeled Miz-hES1 cells, which was identified to be heat shock 70-kDa protein 8 isoform 1 (HSPA8) by quadrupole time-of-flight tandem mass spectrometry. Immunocytochemical analyses proved that the HSPA8 protein was also present on the surface of hESC lines Miz-hES4, Miz-hES6, and HSF6. Two-color flow cytometric analysis of Miz-hES1 and HSF6 showed the coexpression of the HSPA8 protein with other hESC markers such as stage-specific embryonic antigen 3 (SSEA3), SSEA4, TRA-1-60, and TRA-1-81. Flow cytometric and Western blot analyses using various cells showed that MAb 20-202S specifically bound to the HSPA8 protein on the surface of Miz-hES1, contrary to other anti-HSP70 antibodies examined. Furthermore, the surface expression of the HSPA8 protein on Miz-hES1 was markedly downregulated upon differentiation. These data indicate that a novel MAb 20-202S recognizes the HSPA8 protein on the surface of hESCs and suggest that the HSPA8 protein is a putative cell-surface marker for undifferentiated hESCs.

Integrity signals

Registry

Crossref · 10.1634/stemcells.2004-0307

Cites

53 of 53 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • HSPA8 was significantly co-expressed with integrin alpha V, annexin I and other ECM components.

    “Also, the heat shock protein 8 (HSPA8), a surface marker for the undifferentiated cellular state expressed on the surface of human embryonic stem cells [39], performs an important role in the repair processes following harmful tissular assaults (for example, hemorrhage or local ischemia) [40], and was found to be significantly co-expressed with integrin alpha V, annexin I and other ECM components.”

Cites

1 retracted

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Son, Y. S., Park, J. H., Kang, Y. K., Park, J., Choi, H. S., Lim, J. Y., Lee, J. E., Lee, J. B., Ko, M. S., Kim, Y., Ko, J., Yoon, H. S., Lee, K., Seong, R. H., Moon, S. Y., Ryu, C. J., & Hong, H. J.
Affiliations
  • Seoul National University (KR)
  • Laboratory of Antibody Engineering, Korea Research Institute of Bioscience and Biotechnology, Daejon, Korea
  • Korea Research Institute of Bioscience and Biotechnology (KR)
  • MizMedi Hospital (KR)
  • Republic of Korea Army (KR)
  • Hanyang University (KR)
Corresponding author
  • Ryu, Chun Jeih
  • Hong, Hyo Jeong
Venue
STEM CELLS
Published
2005-11
Volume
23
Issue
10
Pages
1502-1513
ISSN
  • 1066-5099 (ISSN-L)
  • 1549-4918
OpenAlex
W1979112028
Cited by
54
References
53
Citations by year
2026: 1 · 2023: 1 · 2022: 1 · 2021: 2 · 2020: 2 · 2019: 3 · 2017: 1 · 2016: 2 · 2015: 3 · 2014: 3 · 2012: 3
FWCI
2.13
Type
journal article
Language
en
Open access
closed
Locations
  • Stem Cells (publishedVersion)
  • PubMed (publishedVersion)
  • KRIBB Repository (submittedVersion)
  • Seoul National University Open Repository (Seoul National University) (submittedVersion)
Funders
Korea Basic Science Institute
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
  • Health Sciences › Medicine › Genetics › Mesenchymal stem cell research
Keywords
human embryonic stem cells, Hsc70, cell surface markers, pluripotency, monoclonal antibodies, differentiation, SSEA-3, SSEA-4, TRA-1-60, TRA-1-81
MeSH terms
Antibodies, Monoclonal, Antigens, Surface, Cell Differentiation, Cell Line, HeLa Cells, Humans, Immunohistochemistry, Mass Spectrometry, Stem Cells, Down-Regulation, HSP70 Heat-Shock Proteins, Protein Isoforms, Embryo Research

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