原标题:细胞培养基对蛋白质−纳米复合的细胞反应动态形成的影响

除了深入纳米表征在细胞实验中,详细了解了影响引起的细胞培养基纳米标准化纳米毒理学试验是至关重要的。

体外协议发展适当的评估不断扩大范围的潜在毒性的纳米粒子是一个具有挑战性的问题,由于其固有的物理化学性质的变化(大小、形状、快速反应、表面积等)在生物流体中的扩散。蛋白涂层的纳米粒子形成动态是一个重要的分子事件,可能会强烈地影响生物反应的纳米毒性试验。在这项工作中,利用柠檬酸皑皑的黄金纳米粒子(AuNPs)不同大小的模型,我们表明,由几个光谱技术(动态光散射,紫外−可见,等离子体共振光散射),蛋白质−NP相互作用是不同的两种广泛使用的蜂窝媒介导的(即,Dulbecco改良的Eagle培养基(DMEM)和罗斯威尔公园纪念研究所(培养)中,添加胎牛血清)。我们发现,在DMEM引出大的时间依赖性的蛋白科罗娜啤酒的形成,表现出不同的动态培养减少蛋白涂层。这些nanobioentities特性也通过十二烷基硫酸钠-聚丙烯酰胺凝胶电泳和质谱进行蛋白质,揭示科罗娜啤酒平均成分并不反映血清蛋白质的相对丰度。为了评估这种混合bionanostructures生物的影响,比较活力检测到两株细胞(HeLa细胞和U937)在两个媒体进行的,在15nm的金纳米粒子的存在。我们观察到蛋白质/NP形成配合物在培养更丰富的内在细胞相比,DMEM,整体发挥较高的细胞毒作用。这些结果表明,除了深入纳米表征在细胞实验中,详细了解了影响引起的细胞培养基纳米标准化纳米毒理学试验是至关重要的。

英文原文:

Effects of Cell Culture Media on the Dynamic Formation of Protein−Nanoparticle Complexes and Influence on the Cellular Response

The development of appropriate in vitro protocols to assess the potential toxicity of the ever expanding range of nanoparticles represents a challenging issue, because of the rapid changes of their intrinsic physicochemical properties (size, shape, reactivity, surface area, etc.) upon dispersion in biological fluids. Dynamic formation of protein coating around nanoparticles is a key molecular event, which may strongly impact the biological response in nanotoxicological tests. In this work, by using citrate-capped gold nanoparticles (AuNPs) of different sizes as a model, we show, by several spectroscopic techniques (dynamic light scattering, UV−visible, plasmon resonance light scattering), that proteins−NP interactions are differently mediated by two widely used cellular media (i.e., Dulbecco Modified Eagle’s medium (DMEM) and Roswell Park Memorial Institute medium (RPMI), supplemented with fetal bovine serum). We found that, while DMEM elicits the formation of a large time-dependent protein corona, RPMI shows different dynamics with reduced protein coating. Characterization of these nanobioentities was also performed by sodium dodecyl sulfate polyacrylamide gel electrophoresis and mass spectroscopy, revealing that the average composition of protein corona does not reflect the relative abundance of serum proteins. To evaluate the biological impact of such hybrid bionanostructures, several comparative viability assays onto two cell lines (HeLa and U937) were carried out in the two media, in the presence of 15 nm AuNPs. We observed that proteins/NP complexes formed in RPMI are more abundantly internalized in cells as compared to DMEM, overall exerting higher cytotoxic effects. These results show that, beyond an in-depth NPs characterization before cellular experiments, a detailed understanding of the effects elicited by cell culture media on NPs is crucial for standardized nanotoxicology tests.

目前广泛应用于细胞培养的是胎牛血清,可用于:病毒载体生产、细胞治疗、哺乳动物细胞培养。胎牛血清是生物制品生产中不可或缺的一种原材料,它的品质会直接影响到生物制品的质量及安全性。虽然减少动物来源成分是现在生物制品行业发展的趋势,可是离攻克无血清的技术还有很长一段距离,胎牛血清依旧在细胞培养领域中占据非常重要的地位。如:Ausbian品牌胎牛血清。好的实验结果离不开优质的实验材料,那好的胎牛血清应具备什么特点呢?

1. 精选极低内毒素低,内毒素选取小于3Eu/ml,可以使细胞更健康。

如果选取内毒素较高的血清,细胞一直泡在毒液里,短期内试不出结果,用不健康的细胞做实验,对实验结果造成严重影响。

2. 同批次数量多,保证了实验更加顺利的同时,节省了试用的时间和成本。

3.具有详细完整的《检测报告》,包括:品名,货号,批号,血源地,生产日期,保质期,pH值、渗透压、血红蛋白、总蛋白、球蛋白、IgG、内毒素、无菌检查(细菌、真菌、支原体)、病毒检查(如BVD、牛腺病毒、细胞病变效应等)、促细胞生长能力、细胞毒性、BVD-1/2抗体检查等。

实验人对于新批次血清,应认真审阅《检测报告》,做好试用前筛选第一步。

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