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Interactions Between Signaling Pathways01:19

Interactions Between Signaling Pathways

Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...

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Related Experiment Video

Updated: May 12, 2026

Isolation, Characterization and Comparative Differentiation of Human Dental Pulp Stem Cells Derived from Permanent Teeth by Using Two Different Methods
14:52

Isolation, Characterization and Comparative Differentiation of Human Dental Pulp Stem Cells Derived from Permanent Teeth by Using Two Different Methods

Published on: November 24, 2012

Small molecules affect human dental pulp stem cell properties via multiple signaling pathways.

Mey Al-Habib1, Zongdong Yu, George T-J Huang

  • 1Department of Endodontics, Henry M. Goldman School of Dental Medicine, Boston University, Boston, Massachusetts, USA.

Stem Cells and Development
|April 12, 2013
PubMed
Summary

Small molecules like Pluripotin, 6-bromoindirubin-3-oxime, and rapamycin maintain stemness in human dental pulp stem cells (hDPSCs). This enhances their potential for regenerative medicine by preserving self-renewal capacity.

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Published on: November 16, 2018

Area of Science:

  • Stem Cell Biology
  • Regenerative Medicine
  • Molecular Biology

Background:

  • Maintaining stem cell stemness is crucial for regenerative medicine.
  • Human dental pulp stem cells (hDPSCs) are promising for clinical applications.
  • Identifying methods to preserve stem cell properties is a key challenge.

Purpose of the Study:

  • To investigate the potential of small molecules to enhance stemness in hDPSCs.
  • To analyze the effects of specific small molecules on hDPSC properties in vitro.
  • To elucidate the underlying molecular mechanisms responsible for these effects.

Main Methods:

  • Primary hDPSC cultures were treated with Pluripotin (SC1), 6-bromoindirubin-3-oxime, and rapamycin.
  • Assessed cell proliferation, expression of pluripotent and MSC markers (STRO-1, NANOG, OCT4, SOX2).
  • Evaluated differentiation potential and intracellular signaling pathway activations (Ras-GAP, ERK1/2, mTOR).

Main Results:

  • Small molecule treatments reduced hDPSC proliferation.
  • Increased expression of key stemness markers (NANOG, OCT4, SOX2, STRO-1) was observed.
  • In vitro differentiation into multiple lineages was significantly diminished.
  • Modulation of Ras-GAP, ERK1/2, and mTOR signaling pathways was identified.

Conclusions:

  • Small molecules can enhance the immature state and self-renewal capacity of hDPSCs in culture.
  • These findings suggest a novel strategy for adult stem cell maintenance.
  • This approach may extend the utility of hDPSCs for regenerative applications.