We demonstrate a novel inorganic-organic crystalline nanoconstruct, where gold atoms were imbedded in the crystal lattices as defects of camptothecin nanocrystals, suggesting its potential use as simultaneous agents for cancer therapy and bioimaging. The incorporation of gold, a potential computed tomography (CT) contrast agent, in the nanocrystals of camptothecin was detected by transmission electron microscope (TEM) and further quantified by energy dispersive X-ray spectrometry (EDS) and inductively coupled plasma-optical emission spectrometers (ICP-OES). Due to gold's high attenuation coefficient, only a relatively small amount needs to be present in order to create a good noise-to-contrast ratio in CT imaging. The imbedded gold atoms and clusters are expected to share the same biological fate as the camptothecin nanocrystals, reaching and accumulating in tumor site due to the enhanced permeation and retention (EPR) effect.


This is the publisher's version of Hollis, Christin P., A. Dozier, B. L. Knutson and Tonglei Li. “Preparation and characterization of multimodal hybrid organic and inorganic nanocrystals of camptothecin and gold.” Acta Pharmaceutica Sinica. B 9 (2019): 128 - 134. https://doi.org/10.1016/j.apsb.2018.03.005.


Hybrid inorganic-organic, drug delivery, camptothecin, gold nanoparticles, computed tomography (CT) contrast agent; cancer therapy and diagnosis

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