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Related Concept Videos

Bone Remodeling01:40

Bone Remodeling

Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.

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Related Experiment Video

Updated: Jun 22, 2026

Distinctive Capillary Action by Micro-channels in Bone-like Templates can Enhance Recruitment of Cells for Restoration of Large Bony Defect
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Published on: September 11, 2015

Post microtextures accelerate cell proliferation and osteogenesis.

Eun Jung Kim1, Cynthia A Boehm, Alvaro Mata

  • 1BioMEMS Laboratory, Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH 44195, USA.

Acta Biomaterialia
|June 23, 2009
PubMed
Summary
This summary is machine-generated.

Surface microtexture significantly influences connective tissue progenitor cells (CTPs) behavior. Microtextured surfaces promote faster cell proliferation and enhance osteogenic gene expression, indicating improved osteogenesis compared to smooth surfaces.

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Area of Science:

  • Biomaterials Science
  • Cell Biology
  • Tissue Engineering

Background:

  • Osteogenesis, the process of bone formation, is crucial for bone regeneration and repair.
  • Surface properties of biomaterials can significantly impact cellular responses, including stem cell behavior.
  • Connective tissue progenitor cells (CTPs) are adult stem cells capable of differentiating into various connective tissues, including bone.

Purpose of the Study:

  • To investigate the effect of surface microtexture on the osteogenic differentiation of human bone marrow-derived CTPs in vitro.
  • To compare the proliferation, morphology, and gene expression of CTPs cultured on smooth and microtextured polydimethylsiloxane (PDMS) surfaces.

Main Methods:

  • Human bone marrow-derived CTPs were cultured on smooth PDMS and PDMS with post microtextures (10 µm diameter, 6 µm height, 10 µm separation).
  • Cell proliferation was assessed using DNA quantification.
  • Cell morphology and orientation were observed under microscopy.
  • Protein expression (integrin alpha5) was analyzed via Western blot.
  • Gene expression of osteogenic markers (alkaline phosphatase, collagen I, osteocalcin) was quantified using real-time RT-PCR.

Main Results:

  • CTPs on microtextured PDMS exhibited a shorter lag phase (4 days) compared to smooth surfaces (6 days).
  • Cells on microtextured surfaces displayed orthogonal growth along posts, while cells on smooth surfaces showed random orientation.
  • Integrin alpha5 expression was higher on microtextured PDMS.
  • Gene expression of collagen I and osteocalcin was consistently higher on microtextured surfaces throughout the 60-day culture period.
  • Alkaline phosphatase gene expression decreased over time on both surfaces.

Conclusions:

  • Surface microtexture plays a critical role in modulating CTP behavior and promoting osteogenesis.
  • Microtextured PDMS surfaces enhance CTP proliferation and osteogenic differentiation compared to smooth surfaces.
  • These findings suggest that surface topography is a key factor in designing biomaterials for bone tissue engineering applications.