Dual ‐Channel Theranostic System for Quantitative Self‐Indication and Low‐Temperature Synergistic Therapy of Cancer

Herein, ICG and Ce6 dual ‐loaded amorphous calcium carbonate (ACC) based core–shell nanoparticles are successfully developed. This platform not only represents a dual‐channel theranostic system to precisely indicate the accumulation and quantitative drug release in tumor tissue in a “turn‐on” manner, but also of fers a unique low‐temperature synergistic strategy to destroy tumor in an effective and minimally invasive way. AbstractA conventional theranostic system usually employs a single fluorescence channel to show the pharmacokinetic events, which usually fails to quantitatively reveal the true cumulative drug release and with low accuracy. Herein, indocyanine green (ICG) and chlorins e6 (Ce6) are selected not only as conventional photothermal/photodynamic agents, but also to offer two independent fluorescence channels to cross validate the authenticity of pharmacokinetic events and to quantitatively reveal cumulative drug release in tumor tissues in a “turn on” manner. Employing the Ca2+ of amorphous calcium carbonate as a reversible linker, the photosensitivity and fluorescence of Ce6 are physically quenched by ICG during circulation to reduce the side effect of photodynamic therapy (PDT) while being readily restored in tumor tissue to reveal the quantitative drug release. Most importantly, the combination of photothermal therapy (PTT) and PDT allows low ‐temperature synergistic therapy of cancer through the controlled expression of heat shock protein ...
Source: Small - Category: Nanotechnology Authors: Tags: Research Article Source Type: research