Phosphonated near-infrared fluorophores for biomedical imaging of bone.

Phosphonated near-infrared fluorophores for biomedical imaging of bone.
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DOI:
10.1002/anie.201404930
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发表时间:
2014-09-26
影响因子:
16.6
通讯作者:
Choi, Hak Soo
Choi, Hak Soo
中科院分区:
化学1区
文献类型:
--
作者:
Hyun, Hoon;Wada, Hideyuki;Bao, Kai;Gravier, Julien;Yadav, Yogesh;Laramie, Matt;Henary, Maged;Frangioni, John V.;Choi, Hak Soo

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用于产生靶向造影剂的常规方法是缀合单独的靶向和荧光团结构域。在这项研究中,我们报告了一个新的战略的基础上纳入五甲川和七甲川吲哚菁的非共振结构的靶向部分。使用已知的亲和力的膦酸盐骨矿物质作为模型系统,我们已经合成了两个家庭的双功能分子,靶向骨,而不需要传统的双膦酸盐。这些分子的荧光发射峰值在约700 nm或约800 nm,可用于FLARE双通道成像。在小鼠中的纵向FLARE研究表明,膦酸化近红外荧光团在骨中保持稳定超过5周,组织学分析表明掺入骨基质。总之,我们描述了一种新的策略,用于创建超紧凑,有针对性的,近红外荧光团的各种生物成像应用。
The conventional method for creating targeted contrast agents is to conjugate separate targeting and fluorophore domains. In this study we report a new strategy based on incorporation of targeting moieties into the non-resonant structure of pentamethine and heptamethine indocyanines. Using the known affinity of phosphonates for bone minerals as a model system, we have synthesized two families of bifunctional molecules that target bone without the need for a traditional bisphosphonate. With peak fluorescence emission at ≈ 700 nm or ≈ 800 nm, these molecules can be used for FLARE dual-channel imaging. Longitudinal FLARE studies in mice demonstrate that phosphonated near-infrared fluorophores remain stable in bone for over 5 weeks, and histological analysis demonstrates incorporation into bone matrix. Taken together, we describe a new strategy for creating ultracompact, targeted, near-infrared fluorophores for various bioimaging applications.
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