세포 인장 자극기의 개발과 세포 인장 자극을 통한 성체 줄기세포의 골분화 유도Development of a Tensile Cell Stimulator to Study the Effects of Uniaxial Tensile Stress on Osteogenic Differentiation of Bone Marrow Mesenchymal Stem Cells
- Other Titles
- Development of a Tensile Cell Stimulator to Study the Effects of Uniaxial Tensile Stress on Osteogenic Differentiation of Bone Marrow Mesenchymal Stem Cells
- Authors
- 신현준; 이우택; 박석훈; 이선화; 박정호; 윤용산; 신현정
- Issue Date
- 2009
- Publisher
- 대한기계학회
- Keywords
- Osteogenic Differentiation; Mesenchymal Stem Cell; Strain Ratio; Cell Tensile Stimulation; 2D Elastic Membrane; Quantitative Analysis; Osteogenic Marker; 골분화; 골수유래성체 줄기세포; 변형률; 세포 인장 자극; 세포 부착 멤브레인; 정량분석; 골분화 지표
- Citation
- 대한기계학회논문집 A, v.33, no.7, pp.629 - 636
- Indexed
- SCOPUS
KCI
- Journal Title
- 대한기계학회논문집 A
- Volume
- 33
- Number
- 7
- Start Page
- 629
- End Page
- 636
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/121320
- ISSN
- 1226-4873
- Abstract
- Mechanical stimulation is known to play a vital role on the differentiation of mesenchymal stem cells (MSCs) to pre-osteoblasts. In this research, we developed a tensile cell stimulator, composed of a DC motordriven actuator and LVDT sensor for measuring linear displacement, to study the effects of tensile stress on osteogenic differentiation of MSCs. First, we demonstrated the reliability of this device by showing the uniform strain field in the silicon substrate. Secondly, we investigated the effects of tensile stretching on osteogenic differentiation. We imposed a pre-set cyclic strain at a fixed frequency on cell monolayer cultured on a flexible silicon substrate while varying its amplitude and duration. 60 min of resting period was allowed between 30 min of cyclic stretching and this cycle is repeated up to 7 days. Under the combined stimulation with osteogenic media and mechanical stretching, the osteogenic markers such as alkaline phosphatase (ALP), osterix, and osteopontin began to get expressed as early as 4 days of stimulation, which is much shorter than what is typically required for osteogenic media induced differentiation. Moreover, different markers were induced at different magnitudes of the applied strains. Lastly, for the case of ALP, we observed the antagonistic effects of osteogenic media when combined with mechanical stretching.
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