Intracellular SERS nanoprobes for distinction of different neuronal cell types.

Intracellular SERS nanoprobes for distinction of different neuronal cell types.
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DOI:
10.1021/nl400448n
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发表时间:
2013-06-12
期刊:
影响因子:
10.8
通讯作者:
Mahajan S
Mahajan S
中科院分区:
材料科学1区
文献类型:
--
作者:
Huefner A;Kuan WL;Barker RA;Mahajan S

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用常规方法很难区分密切相关和形态相似的细胞,特别是在没有标记的情况下。使用核靶向金纳米颗粒(AuNPs)作为细胞内探针,我们展示了使用表面增强拉曼光谱(SERS)区分人类神经母细胞瘤细胞系中祖细胞和分化细胞类型的能力。使用主成分分析对整个细胞区以及仅细胞核的SERS光谱进行了分析,从而可以明确区分不同的细胞类型。核区的SERS光谱通过鉴定DNA/RNA比率和转录的蛋白质的增加来显示细胞分化过程中的发展。我们的方法使用核靶向AuNPs和SERS成像,提供了无标记和非侵入性的表征,在生物医学干细胞研究中识别细胞类型方面发挥了至关重要的作用。
Distinction between closely related and morphologically similar cells is difficult by conventional methods especially without labeling. Using nuclear-targeted gold nanoparticles (AuNPs) as intracellular probes we demonstrate the ability to distinguish between progenitor and differentiated cell types in a human neuroblastoma cell line using surface-enhanced Raman spectroscopy (SERS). SERS spectra from the whole cell area as well as only the nucleus were analyzed using principal component analysis that allowed unambiguous distinction of the different cell types. SERS spectra from the nuclear region showed the developments during cellular differentiation by identifying an increase in DNA/RNA ratio and proteins transcribed. Our approach using nuclear-targeted AuNPs and SERS imaging provides label-free and noninvasive characterization that can play a vital role in identifying cell types in biomedical stem cell research.
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