Size-tunable ICG-based contrast agent platform for targeted near-infrared photoacoustic imaging.

Size-tunable ICG-based contrast agent platform for targeted near-infrared photoacoustic imaging.
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DOI:
10.1016/j.pacs.2022.100437
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发表时间:
2023-03
期刊:
影响因子:
7.9
通讯作者:
Veneziano, Remi
Veneziano, Remi
中科院分区:
工程技术1区
文献类型:
--
作者:
Singh, Shrishti;Giammanco, Giovanni;Hu, Chih-Hsiang;Bush, Joshua;Cordova, Leandro Soto;Lawrence, Dylan J.;Moran, Jeffrey L.;V. Chitnis, Parag;Veneziano, Remi

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Near-infrared photoacoustic imaging (NIR-PAI) combines the advantages of optical and ultrasound imaging to provide anatomical and functional information of tissues with high resolution. Although NIR-PAI is promising, its widespread use is hindered by the limited availability of NIR contrast agents. J-aggregates (JA) made of indocyanine green dye (ICG) represents an attractive class of biocompatible contrast agents for PAI. Here, we present a facile synthesis method that combines ICG and ICG-azide dyes for producing contrast agents with tunable size down to 230 nm and direct functionalization with targeting moieties. The ICG-JA platform has a detectable PA signal in vitro that is two times stronger than whole blood and high photostability. The targeting ability of ICG-JA was measured in vitro using HeLa cells. The ICG-JA platform was then injected into mice and in vivo NIR-PAI showed enhanced visualization of liver and spleen for 90 min post-injection with a contrast-to-noise ratio of 2.42.
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