Labeling Monomeric Insulin with Renal-Clearable Luminescent Gold Nanoparticles.

Labeling Monomeric Insulin with Renal-Clearable Luminescent Gold Nanoparticles.
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DOI:
10.1021/acs.bioconjchem.5b00490
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发表时间:
2015-12-16
影响因子:
4.7
通讯作者:
Zheng J
Zheng J
中科院分区:
化学2区
文献类型:
--
作者:
Vinluan RD 3rd;Yu M;Gannaway M;Sullins J;Xu J;Zheng J

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In the native physiological environment, inorganic nanoparticles (NPs) often induce nonspecific protein adsorption, which could significantly alter the function of the proteins they labeled. As a result, small fluorescent dyes are still widely used in the imaging of proteins in animals due to their minimal interference with protein function. Here, we used monomeric insulin as a model and compared its bioactivity before and after labeling with renal-clearable near-infrared-emitting gold NPs. These NPs were chosen because they have high resistance to serum protein adsorption and low nonspecific accumulation. We have found that a 1:1 insulin–NP ratio can be achieved, where the insulin–NPs show minimal serum protein binding with fully retained bioactivity comparable to that of unlabeled insulin. These results show a proof of concept that renal-clearable NPs can behave like small molecules in protein labeling without changing the individual protein’s function, laying down a foundation for in vivo tracking of proteins with multimodality imaging techniques.
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