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Sequential growth factor application in bone marrow stromal cell ligament engineering.

Jodie E Moreau1, Jingsong Chen, Rebecca L Horan

  • 1Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, USA.

Tissue Engineering
|January 18, 2006
PubMed
Summary
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Sequential growth factors significantly enhanced in vitro ligament development using bone marrow stromal cells (BMSCs) on silk matrices. This approach promoted greater cell ingrowth and collagen production within 14 days.

Area of Science:

  • Biomaterials Engineering
  • Tissue Engineering
  • Cell Biology

Background:

  • Optimizing in vitro cell culture requires mimicking physiological biochemical environments.
  • Bone marrow stromal cells (BMSCs) are crucial for tissue regeneration.
  • Silk fibroin matrices offer a promising scaffold for tissue engineering.

Purpose of the Study:

  • To investigate the efficacy of sequential growth factor administration for enhancing ligament tissue development in vitro.
  • To evaluate the impact of specific growth factors on BMSC proliferation and differentiation on silk scaffolds.
  • To determine the optimal culture conditions for in vitro ligamentogenesis.

Main Methods:

  • Bone marrow stromal cells (BMSCs) were cultured on RGD-modified silk matrices.

Related Experiment Videos

  • Cells were treated with sequential growth factors: basic fibroblast growth factor (B) and epidermal growth factor (E) followed by transforming growth factor-beta1 (T).
  • Techniques included real-time RT-PCR, SEM, MTT assays, histology, and ELISA for collagen type I quantification.

    • Main Results:

    • Sequential administration of growth factors (BT) significantly increased cell ingrowth and cumulative collagen type I expression after 14 days.
    • Transforming growth factor-beta1 (T) supplementation enhanced both cell ingrowth and collagen deposition compared to controls.
    • All tested groups exhibited fibroblast morphology aligned with silk fiber direction, indicating successful cell integration.

    Conclusions:

    • Sequential growth factor application is an effective strategy for promoting in vitro ligament development.
    • This method supports enhanced BMSC proliferation, differentiation, and extracellular matrix production on silk scaffolds.
    • The findings suggest a viable 14-day protocol for in vitro ligament tissue engineering.