Actively targeted in vivo multiplex detection of intrinsic cancer biomarkers using biocompatible SERS nanotags.

Actively targeted in vivo multiplex detection of intrinsic cancer biomarkers using biocompatible SERS nanotags.
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DOI:
10.1038/srep04075
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发表时间:
2014-02-12
期刊:
影响因子:
4.6
通讯作者:
Olivo M
Olivo M
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Dinish US;Balasundaram G;Chang YT;Olivo M

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表面增强拉曼散射(SERS)技术由于具有每个分子的“指纹”拉曼光谱而成为多重生物传感的热门技术。作为概念验证,我们使用三个具有多路复用能力、生物兼容的β纳米颗粒/纳米标记,在乳腺癌模型中展示了主动靶向多路复用在体外和体内检测三个内在癌症生物标记物-EGFR、CD44和转化生长因子SERSRII。肿瘤内注射针对这三个生物标志物的抗体结合纳米标记在6 小时显示最大信号,在72 小时没有检测到信号。然而,没有抗体的纳米标签在6 小时后没有检测到信号。这种差异可能是由于生物结合的纳米标记与细胞表面的受体特异性结合所致。因此,本研究建立了SERS纳米标记作为一种超灵敏的纳米探针,用于生物标志物的多重检测,并开辟了其在监测肿瘤进展和治疗以及发展为治疗探针方面的潜在应用。
Surface-enhanced Raman scattering (SERS) technique is becoming highly popular for multiplex biosensing due to the ‘fingerprint’ Raman spectra from every molecule. As a proof-of-concept, we demonstrated the actively targeted multiplex in vitro and in vivo detection of three intrinsic cancer biomarkers - EGFR, CD44 and TGFβRII in a breast cancer model using three multiplexing capable, biocompatible SERS nanoparticles/nanotags. Intra-tumorally injected antibody conjugated nanotags specifically targeting the three biomarkers exhibited maximum signal at 6 hours and no detectable signal at 72 hours. However, nanotags without antibodies showed no detectable signal after 6 hours. This difference could be due to the specific binding of the bioconjugated nanotags to the receptors on the cell surface. Thus, this study establishes SERS nanotags as an ultrasensitive nanoprobe for the multiplex detection of biomarkers and opens up its potential application in monitoring tumor progression and therapy and development into a theranostic probe.
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