CAJ | 학술논문

目的探讨适宜组织工程化骨构建的流体剪切力和物质转运速度.方法对接种人骨髓间质干细胞的多孔β-磷酸三钙支架进行灌注培养.灌流量相同时,对支架上的细胞分别施加1×、2×及3×的流体剪切力;流体剪切力相同时,分别给予3ml/min、6 ml/min和9 ml/min的灌注.细胞增殖采用MTT法,通过检测碱性磷酸酶(alkalilinphosphatase,AKP)活性、骨桥蛋白(osteopontin,OP)、骨钙素(osteocalcin,OC)分泌及细胞外基质的矿化评价组织工程化骨的构建.通过计算流体动力学得出流体剪切力和物质转运速度.结果灌流量相同时,剪切力2×组细胞增殖活性最高;2×和3×组AKP活性及OC分泌高于1×组;第28天时,3×组矿化基质最多.流体剪切力相同时,6 ml/min组AKP活性最高;第28天时,3 ml/min组OC分泌最高,矿化基质最多.灌流量相同时,流体剪切力分别为0.004～0.007 Pa、0.009～0.013 Pa和0.013～0.018 Pa;流体剪切力相同时,物质转运速度分别为0.267～0.384 mm/s、0.521～0.765mm/s和0.765～1.177 mm/s.结论利用接种人骨髓间质干细胞的β-磷酸三钙支架构建组织工程化骨时,0.013～0.018 Pa的流体剪切力及0.267～0.384 mm/s的物质转运速度是适宜的.
목적 탐토괄의조직공정화골구건적류체전절력화물질전운속도.방법 대접충인골수간질간세포적다공β-린산삼개지가진행관주배양.관류량상동시,대지가상적세포분별시가1×、2×급3×적류체전절력;류체전절력상동시,분별급여3ml/min、6 ml/min화9 ml/min적관주.세포증식채용MTT법,통과검측감성린산매(alkalilinphosphatase,AKP)활성、골교단백(osteopontin,OP)、골개소(osteocalcin,OC)분비급세포외기질적광화평개조직공정화골적구건.통과계산류체동역학득출류체전절력화물질전운속도.결과 관류량상동시,전절력2×조세포증식활성최고;2×화3×조AKP활성급OC분비고우1×조;제28천시,3×조광화기질최다.류체전절력상동시,6 ml/min조AKP활성최고;제28천시,3 ml/min조OC분비최고,광화기질최다.관류량상동시,류체전절력분별위0.004～0.007 Pa、0.009～0.013 Pa화0.013～0.018 Pa;류체전절력상동시,물질전운속도분별위0.267～0.384 mm/s、0.521～0.765mm/s화0.765～1.177 mm/s.결론 이용접충인골수간질간세포적β-린산삼개지가구건조직공정화골시,0.013～0.018 Pa적류체전절력급0.267～0.384 mm/s적물질전운속도시괄의적.
Objective To explore the optimum flow shear stress and mass transport for the construction of tissue-engineered bone.Methods The β-tricalcium phosphate (β-TCP) scaffolds seeded with human bone marrow-derived mesenchymal stem cells (HBMMSCs) were cultured in perfusion bioreactor.When the same flow rate was applied,the flow shear stress was separately 1×,2× and 3×.When the same flow shear stress was applied,the flow rates were separately 3 ml/min,6 ml/min and 9 ml/min.Cell proliferation was measured by MTT method.The construction of tissue-engineered bone was evaluated by measuring alkaline phosphatase (AKP) activity,secretion of osteopontin (OP) and osteocalcin (OC),and the mineralization of extracellular matrix (ECM).The flow shear stress and the mass transport were obtained using computational fluid dynamics.Results When the flow rate was same,the most cell proliferation was found in 2× group.The AKP activity and secretion of OC was higher in 2× and 3× groups than in those in 1× group.After 28days,the highest amount of mineralization of ECM was found in 3× group.When the flow shear stress was same,the AKP activity was highest in 6 ml/min group.After 28 days,secretion of OC and formation of mineralized ECM was highest in 3 ml/min group.When the flow rate was same,the flow shear stress was separately 0.004-0.007 Pa,0.009-0.013 Pa and 0.013-0.018 Pa.When the flow shear stress was same,the flow rate was separately 0.267-0.384 mm/s,0.521-0.765 mm/s and 0.765-1.177 mm/s.Conclusion When the tissue-engineered bone was constructed,0.013-0.018 Pa flow shear stress and 0.267-0.384 mm/s mass transport velocity could improve the construction of the tissue-engineered bone in vitro.