Using polyvinyl alcohol (PVA) as raw material and vacuum pump oil as oil phase medium, PVA-based microcarriers were prepared by suspension method. The diameters of the beads were 100-180μm. LO2 cells were cultured on...Using polyvinyl alcohol (PVA) as raw material and vacuum pump oil as oil phase medium, PVA-based microcarriers were prepared by suspension method. The diameters of the beads were 100-180μm. LO2 cells were cultured on PVA-based microcarriers and cytodexIII microcarriers. Morphology, attachment and growth rate of LO2 cells were studied.展开更多
To address the controversial issue of the toxicity of dental alloys and silver nanoparticles in medical ap- plications, an in vivo-like LO2 3-D model was constructed within polyvinylidene fluoride hollow fiber materia...To address the controversial issue of the toxicity of dental alloys and silver nanoparticles in medical ap- plications, an in vivo-like LO2 3-D model was constructed within polyvinylidene fluoride hollow fiber materials to mimic the microenvironment of liver tissue. The use of microscopy methods and the measurement of liver-specific functions optimized the model for best cell performances and also proved the superiority of the 3-D LO2 model when compared with the traditional monolayer model. Toxicity tests were conducted using the newly constructed model, finding that four dental castings coated with silver nanoparticles were toxic to human hepatocytes after cell viability assays. In general, the toxicity of both the castings and the coated silver nanoparticles aggravated as time increased, yet the nanoparticles attenuated the general toxicity by preventing metal ion release, especially at high concentrations.展开更多
目的:探讨建立人肝细胞系LO2单纯肝脂肪变性细胞模型的方法。方法:试验分为正常对照组与试验组,用含10%胎牛血清的1640培养基培养LO2细胞,当细胞处于对数生长期时,正常对照组更换新鲜的1640培养基,试验组用含不同浓度游离脂肪酸(油酸∶...目的:探讨建立人肝细胞系LO2单纯肝脂肪变性细胞模型的方法。方法:试验分为正常对照组与试验组,用含10%胎牛血清的1640培养基培养LO2细胞,当细胞处于对数生长期时,正常对照组更换新鲜的1640培养基,试验组用含不同浓度游离脂肪酸(油酸∶棕榈酸为2∶1)的1640培养基培养,24 h后油红O染色,观察细胞内脂滴大小,并检测细胞中TG、TC含量的变化及细胞增殖情况。结果:试验组中LO2细胞内有大量的脂滴生成,且甘油三酯水平显著升高,其中,以1.2 mM FFA组脂质沉积最为明显。同时,细胞抑制率小于4%,胆固醇水平无明显升高,均符合单纯脂肪变性模型的特征。结论:采用游离脂肪酸(油酸∶棕榈酸为2∶1)可以成功诱导LO2细胞单纯脂肪变性,其中游离脂肪酸浓度以1.2 m M最为理想。展开更多
基金The National Natural Science Foundation of China(No.29776027).
文摘Using polyvinyl alcohol (PVA) as raw material and vacuum pump oil as oil phase medium, PVA-based microcarriers were prepared by suspension method. The diameters of the beads were 100-180μm. LO2 cells were cultured on PVA-based microcarriers and cytodexIII microcarriers. Morphology, attachment and growth rate of LO2 cells were studied.
基金Project supported by the Zhejiang Provincial Natural Science Foundation of China(No.LZ14C200001)the Public Welfare Project of Science Technology Department of Zhejiang Province(No.2013c33139),China
文摘To address the controversial issue of the toxicity of dental alloys and silver nanoparticles in medical ap- plications, an in vivo-like LO2 3-D model was constructed within polyvinylidene fluoride hollow fiber materials to mimic the microenvironment of liver tissue. The use of microscopy methods and the measurement of liver-specific functions optimized the model for best cell performances and also proved the superiority of the 3-D LO2 model when compared with the traditional monolayer model. Toxicity tests were conducted using the newly constructed model, finding that four dental castings coated with silver nanoparticles were toxic to human hepatocytes after cell viability assays. In general, the toxicity of both the castings and the coated silver nanoparticles aggravated as time increased, yet the nanoparticles attenuated the general toxicity by preventing metal ion release, especially at high concentrations.
文摘目的:探讨建立人肝细胞系LO2单纯肝脂肪变性细胞模型的方法。方法:试验分为正常对照组与试验组,用含10%胎牛血清的1640培养基培养LO2细胞,当细胞处于对数生长期时,正常对照组更换新鲜的1640培养基,试验组用含不同浓度游离脂肪酸(油酸∶棕榈酸为2∶1)的1640培养基培养,24 h后油红O染色,观察细胞内脂滴大小,并检测细胞中TG、TC含量的变化及细胞增殖情况。结果:试验组中LO2细胞内有大量的脂滴生成,且甘油三酯水平显著升高,其中,以1.2 mM FFA组脂质沉积最为明显。同时,细胞抑制率小于4%,胆固醇水平无明显升高,均符合单纯脂肪变性模型的特征。结论:采用游离脂肪酸(油酸∶棕榈酸为2∶1)可以成功诱导LO2细胞单纯脂肪变性,其中游离脂肪酸浓度以1.2 m M最为理想。
