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產(chǎn)品目錄
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    進口胎牛血清
    進口新生牛血清
    進口豬血清
    馬血清
  • 支原體檢測盒及標準品
    常規(guī)PCR檢測試劑盒
    熒光定量PCR檢測(qPCR法)
    支原體DNA提取
    靈敏度標準品(方法驗證用)
    特異性標準品(方法驗證用)
    PCR定量標準品(可用于方法驗證)
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    細胞中支原體祛除
    環(huán)境支原體祛除
    水槽支原體祛除
  • 干細胞培養(yǎng)基
  • DNA/RNA污染祛除
    DNA/RNA污染祛除試劑
    DNA污染監(jiān)測
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    病毒RNA提取
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    DNA污染監(jiān)測祛除
    PCR/qPCR儀性能檢查
    PCR試劑
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    PCR預混液(凍干粉)
    熱啟動聚合酶MB Taq DNA
  • 微生物PCR檢測
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細胞培養(yǎng)基對蛋白質(zhì)?納米復合的細胞反應動態(tài)形成的影響

2016-09-30 14:10

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.



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