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Updated: Jun 23, 2025
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A Simple Method to Identify Kinases That Regulate Embryonic Stem Cell Pluripotency by High-throughput Inhibitor Screening
Published on: May 12, 2017
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A secreted proteomic footprint for stem cell pluripotency
Philip A Lewis1, Edina Silajdžić1, Helen Smith1
1Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, United Kingdom.
Plos One
|June 14, 2024
Summary
Monitoring human pluripotent stem cells (hPSCs) non-invasively is crucial. Proteomic analysis of waste medium identified biomarkers indicating pluripotency loss, enabling robust monitoring.
Area of Science:
- Stem cell biology
- Proteomics
- Biomarker discovery
Background:
- Maintaining the pluripotent state of human stem cells (hPSCs) is critical for research and therapeutic applications.
- Current methods for monitoring pluripotency often require invasive cell sampling.
- Developing non-invasive monitoring techniques is a significant unmet need in stem cell culture.
Purpose of the Study:
- To develop a non-invasive method for monitoring the healthy pluripotent state of human stem cells (hPSCs).
- To identify proteomic biomarkers in the waste medium indicative of early pluripotency loss.
Main Methods:
- Proteomic analysis of waste medium from cultured embryonic and induced hPSCs.
- Culturing hPSCs in E8 medium to maintain pluripotency, followed by transfer to E6 media to induce pluripotency loss.
- Transcriptome analysis to correlate proteomic changes with gene expression.
- Western blotting to validate identified biomarkers.
Main Results:
- A distinct proteomic footprint associated with early pluripotency loss was identified in hPSC waste medium.
- A strong correlation was observed between the proteomic footprint and transcriptome changes.
- Multiplexing of eight secretome biomarkers (four E8-enriched and four E6-enriched) provided a robust diagnostic metric for the pluripotent state.
- Biomarker validation via Western blotting confirmed consistent correlation with pluripotency across cell lines and recovery assays.
Conclusions:
- Secretome proteomic analysis of hPSC waste medium offers a non-invasive method for monitoring pluripotency.
- A panel of validated biomarkers can reliably diagnose the pluripotent state.
- This approach facilitates the development of robust quality control for hPSC cultures.
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