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Related Experiment Video

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ECM coating modification generated by optimized decellularization process improves functional behavior of BMSCs.

Mei Li1, Tingxia Zhang2, Jingyu Jiang2

  • 1Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo University, Ningbo, Zhejiang 315211, People's Republic of China; Ningbo Institute of Medical Sciences, Ningbo, Zhejiang 315020, People's Republic of China.

Materials Science & Engineering. C, Materials for Biological Applications
|September 25, 2019
PubMed
Summary
This summary is machine-generated.

Optimized decellularization using Triton X-100 and freeze/thaw cycles (TFFF) effectively preserves extracellular matrix (ECM) for bone mesenchymal stem cells (BMSCs). This enhanced ECM supports BMSC proliferation and maintains stemness for tissue engineering applications.

Keywords:
Bone mesenchymal stem cells (BMSCs)DecellularizationExtracellular matrix (ECM)Stemness

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Area of Science:

  • Biomaterials Science
  • Stem Cell Biology
  • Tissue Engineering

Background:

  • Bone mesenchymal stem cells (BMSCs) are crucial for regenerative medicine but face limitations due to low cell numbers and loss of stemness during in vitro expansion.
  • Developing effective methods for expanding BMSCs while preserving their characteristics is essential for clinical applications.

Purpose of the Study:

  • To optimize a decellularization process for creating extracellular matrix (ECM) coating substrates that enhance bone mesenchymal stem cell (BMSC) expansion in vitro.
  • To evaluate the effectiveness of the optimized decellularization method in preserving ECM structure and components, and its impact on BMSC stemness and proliferation.

Main Methods:

  • Osteoblasts were cultured to produce ECM, followed by decellularization using Triton X-100 (T) and three freeze/thaw cycles (TFFF).
  • The TFFF decellularization method was optimized to minimize residual DNA and proteins while preserving ECM integrity.
  • Residual DNA and protein content were quantified, and ECM components (fibronectin, collagen) were analyzed.
  • BMSCs were cultured on different decellularized ECM (dECM) substrates, and their proliferation, osteogenic differentiation, and stemness markers (OCT4, NANOG) were assessed.

Main Results:

  • The TFFF method resulted in significantly lower residual DNA (<2%) and proteins compared to traditional Triton X-100 and NH4OH (TN) methods.
  • TFFF decellularization best preserved ECM components and structural integrity, with fibronectin and collagen forming classic network fibers.
  • All tested dECMs promoted BMSC proliferation and osteogenic differentiation, but TFFF-ECM enhanced early-stage cell growth and preserved stemness markers (OCT4, NANOG).
  • Proteomic analysis revealed ECM proteins in TFFF-ECM involved in diverse biological activities and signaling pathways crucial for stemness maintenance.

Conclusions:

  • A mild TFFF decellularization process effectively generates dECM substrates that enhance BMSC expansion and preserve stemness in vitro.
  • The optimized dECM provides a superior microenvironment for BMSC culture compared to other dECM types, indicated by faster early growth and maintained stemness.
  • This study highlights the potential of TFFF-derived dECM for improving BMSC-based tissue repair and regenerative medicine strategies.