该文研究梅花鹿鹿茸I型胶原(SPC-I)对大鼠成骨样细胞ROS1728的影响,为SPC-I抗骨质疏松的治疗提供理论依据。采用贴壁法培养大鼠成骨样细胞ROS1728,通过CCK-8法检测SPC-I对ROS1728细胞增殖的影响,利用RT-PCR法检测成骨相关基因Runx2,oser...该文研究梅花鹿鹿茸I型胶原(SPC-I)对大鼠成骨样细胞ROS1728的影响,为SPC-I抗骨质疏松的治疗提供理论依据。采用贴壁法培养大鼠成骨样细胞ROS1728,通过CCK-8法检测SPC-I对ROS1728细胞增殖的影响,利用RT-PCR法检测成骨相关基因Runx2,osernix,ALP,Coll-I,OC的表达,利用Western-bolt法检测Runx2蛋白的表达。结果表明SPC-I质量浓度5g·L^(-1)组轻度抑制ROS1728细胞的增殖,但能够明显促进ROS1728细胞特异性转录因子Runx2,osterix m RNA的表达,Runx2蛋白的表达,以及标志基因ALP,Coll-I,OC m RNA的表达(P<0.01),并且呈现出时间依赖性。SPC-I质量浓度2.5,10 g·L^(-1)组均明显抑制ROS1728细胞的增殖(P<0.01),并抑制相关基因的表达。该实验证明质量浓度5 g·L^(-1)组轻度抑制ROS1728细胞的增殖,但可以明显增强ROS1728细胞的功能,通过调控Runx2基因的表达,促进ROS1728细胞的分化、成熟。展开更多
BACKGROUND: Osteosarcoma is characterized by high neovascularization and a high propensity for metastasis through bloodstream. This study was to examine whether there is evidence for vasculogenic mimicry in osteosarco...BACKGROUND: Osteosarcoma is characterized by high neovascularization and a high propensity for metastasis through bloodstream. This study was to examine whether there is evidence for vasculogenic mimicry in osteosarcoma and to illustrate mechanism of tumor blood vessels formation in osteosarcoma. METHODS: Osteosarcoma cell lines (U-2OS) were tested for their ability to form tubular networks in three-dimensional culture containing type I collagen. The structures of the tubular networks were observed with phase contrast microscope and transmission electron microscope (TEM). Morphometric studies using hematoxylin and eosin (HE) stain and CD31 immunohistochemical stain to show tumor-lined channels in human osteosarcoma were also performed. RESULTS: Observation with light microscope and TEM showed that highly aggressive osteosarcoma cell lines (U-2OS) formed networks containing channels when grown in three-dimensional culture containing type I collagen, in the absence of endothelial cells or fibroblasts. Morphometric observation using HE stain and CD31 immunohistochemical stain showed that tumor cell-lined channels were also detected in vivo in osteosarcoma; by comparison, all vascular areas in the pedicle of osteochondroma or outside osteochondroma were endothelial-lined. CONCLUSION: These observations strongly suggest that aggressive osteosarcoma cells may generate vascular channels that facilitate tumor perfusion independent of tumor angiogenesis and have the ability of vasculogenic mimicry.展开更多
文摘该文研究梅花鹿鹿茸I型胶原(SPC-I)对大鼠成骨样细胞ROS1728的影响,为SPC-I抗骨质疏松的治疗提供理论依据。采用贴壁法培养大鼠成骨样细胞ROS1728,通过CCK-8法检测SPC-I对ROS1728细胞增殖的影响,利用RT-PCR法检测成骨相关基因Runx2,osernix,ALP,Coll-I,OC的表达,利用Western-bolt法检测Runx2蛋白的表达。结果表明SPC-I质量浓度5g·L^(-1)组轻度抑制ROS1728细胞的增殖,但能够明显促进ROS1728细胞特异性转录因子Runx2,osterix m RNA的表达,Runx2蛋白的表达,以及标志基因ALP,Coll-I,OC m RNA的表达(P<0.01),并且呈现出时间依赖性。SPC-I质量浓度2.5,10 g·L^(-1)组均明显抑制ROS1728细胞的增殖(P<0.01),并抑制相关基因的表达。该实验证明质量浓度5 g·L^(-1)组轻度抑制ROS1728细胞的增殖,但可以明显增强ROS1728细胞的功能,通过调控Runx2基因的表达,促进ROS1728细胞的分化、成熟。
基金ThisstudywassupportedinpartbyagrantfromtheNationalNaturalScienceFoundationofChina (No 3 0 2 713 14 )
文摘BACKGROUND: Osteosarcoma is characterized by high neovascularization and a high propensity for metastasis through bloodstream. This study was to examine whether there is evidence for vasculogenic mimicry in osteosarcoma and to illustrate mechanism of tumor blood vessels formation in osteosarcoma. METHODS: Osteosarcoma cell lines (U-2OS) were tested for their ability to form tubular networks in three-dimensional culture containing type I collagen. The structures of the tubular networks were observed with phase contrast microscope and transmission electron microscope (TEM). Morphometric studies using hematoxylin and eosin (HE) stain and CD31 immunohistochemical stain to show tumor-lined channels in human osteosarcoma were also performed. RESULTS: Observation with light microscope and TEM showed that highly aggressive osteosarcoma cell lines (U-2OS) formed networks containing channels when grown in three-dimensional culture containing type I collagen, in the absence of endothelial cells or fibroblasts. Morphometric observation using HE stain and CD31 immunohistochemical stain showed that tumor cell-lined channels were also detected in vivo in osteosarcoma; by comparison, all vascular areas in the pedicle of osteochondroma or outside osteochondroma were endothelial-lined. CONCLUSION: These observations strongly suggest that aggressive osteosarcoma cells may generate vascular channels that facilitate tumor perfusion independent of tumor angiogenesis and have the ability of vasculogenic mimicry.
