作者
Michael P Luciano, Stephen N Crooke, Saghar Nourian, Ivan Dingle, Roger R Nani, Gabriel Kline, Nimit L Patel, Christina M Robinson, Simone Difilippantonio, Joseph D Kalen, MG Finn, Martin J Schnermann
发表日期
2019/4/27
期刊
ACS Chemical Biology
卷号
14
期号
5
页码范围
934-940
出版商
American Chemical Society
简介
Heptamethine cyanines are broadly used for a range of near-infrared imaging applications. As with many fluorophores, these molecules are prone to forming nonemissive aggregates upon biomolecule conjugation. Prior work has focused on persulfonation strategies, which only partially address these issues. Here, we report a new set of peripheral substituents, short polyethylene glycol chains on the indolenine nitrogens and a substituted alkyl ether at the C4′ position, that provide exceptionally aggregation-resistant fluorophores. These symmetrical molecules are net-neutral, can be prepared in a concise sequence, and exhibit no evidence of H-aggregation even at high labeling density when appended to monoclonal antibodies or virus-like particles. The resulting fluorophore–biomolecule conjugates exhibit exceptionally bright in vitro and in vivo signals when compared to a conventional persulfonated …
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MP Luciano, SN Crooke, S Nourian, I Dingle, RR Nani… - ACS Chemical Biology, 2019