Research Progress in Cyanine Dyes and Their Functionalized Nanocomposites Used for Bioanalysis and Near-Infrared Molecular Fluorescent Imaging

菁染料(Cy)在近红外区域有较强的荧光发射且易于修饰，因而近年来被广泛地应用于敏化生物分子、细胞和组织等物质，形成荧光标记的复合体，从而为生物分析、生物成像和疾病(特别是肿瘤)的机理分析和治疗提供了一条非常便利的途径。本文总结了近年来几种常见的菁染料(Cy3, Cy5, Cy7, Cy3.5和Cy5.5)及其与无机纳米粒子形成的纳米荧光标记物在生物分析和近红外成像方面所取得的最新成果。 Cyanine (Cy) compounds can produce strong fluorescent emission in the near infrared region after radiation and be easily modified with various substituents, thus they have been recently widely used as fluorescent probes to bind with bio-molecules, cells and tissues. The as-prepared lumi-nescent materials have provided a facile route for the bioanalysis, molecular fluorescent imaging and clinicopathologic analysis, especially for the tumour diagnosis and treatment. In this work, we reviewed the latest achievement of applications of several well-known cyanine derivatives such as Cy3, Cy5, Cy7, Cy3.5, Cy5.5, and their bio-nanocomposites produced with inorganic nanoparticles as luminescent probes in the fields of bioanalysis and near infrared molecular imaging.