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Updated: Sep 2, 2025

Assessment of the Immunomodulatory Properties of Human Mesenchymal Stem Cells MSCs
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Assessment of the Immunomodulatory Properties of Human Mesenchymal Stem Cells MSCs

Published on: December 24, 2015

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Cyclin-Dependent Kinase 1 Inhibition Potentiates the Proliferation of Tonsil-Derived Mesenchymal Stem Cells by

Da Hyeon Choi1, Kyeong Eun Lee1, Yoon Shin Park1

  • 1Department of Biological Sciences and Biotechnology, School of Biological Sciences, College of Natural Sciences, Chungbuk National University, Cheongju 28644, Republic of Korea.

Stem Cells International
|August 1, 2022
PubMed

Insights

Senescent mesenchymal stem cells (MSCs) show altered properties. Cyclin-dependent kinase 1 (CDK1) is identified as a key biomarker for senescent MSCs, offering new research avenues.

Area of Science:

  • Cellular Biology
  • Stem Cell Research
  • Regenerative Medicine

Background:

  • Mesenchymal stem cells (MSCs) are crucial for tissue regeneration and stem cell therapy, with many clinical trials underway.
  • Cellular senescence, a state of irreversible cell cycle arrest, significantly impacts MSC properties and function.
  • Understanding senescence in MSCs is vital for optimizing their therapeutic potential and clinical applications.

Purpose of the Study:

  • To establish a reliable model for senescent mesenchymal stem cells (MSCs).
  • To identify novel biomarkers for aged, senescent tonsil-derived MSCs (TMSCs) using transcriptomics.
  • To investigate the role of specific cell cycle regulators in MSC senescence.

Main Methods:

  • Development of a senescent MSC model using senescence-associated β-galactosidase staining, proliferation, and cell cycle assays.
  • Transcriptomic analysis to identify differentially expressed genes in young versus old TMSCs.
  • Quantitative RT-PCR and Western blotting to validate gene and protein expression, including the use of CDK1 inhibitors and siRNA.

Main Results:

  • Senescent MSCs exhibited compromised proliferation and irreversible cell cycle arrest.
  • Transcriptomics revealed significantly higher expression of cyclin-dependent kinase 1 (CDK1; +8-fold), CDK2 (+2-fold), and transforming growth factor beta 2 (TGFB2; +2-fold) in old TMSCs.
  • Increased gene and protein expression of CDK1 was confirmed in replicative senescent TMSCs, and its inhibition affected cell cycle progression.

Conclusions:

  • Cyclin-dependent kinase 1 (CDK1) serves as a selective senescence biomarker for mesenchymal stem cells (MSCs).
  • The findings provide novel insights into the mechanisms of MSC senescence.
  • CDK1 can potentially broaden research criteria for understanding senescent mechanisms in MSCs.

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