Far-Red/Near-Infrared Conjugated Polymer Nanoparticles for Long-Term In Situ Monitoring of Liver Tumor Growth.

Far-Red/Near-Infrared Conjugated Polymer Nanoparticles for Long-Term In Situ Monitoring of Liver Tumor Growth.
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DOI:
10.1002/advs.201500008
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发表时间:
2015-05
期刊:
影响因子:
15.1
通讯作者:
Liu, Bin
Liu, Bin
中科院分区:
材料科学1区
文献类型:
--
作者:
Liu, Jie;Li, Kai;Liu, Bin

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报道了荧光共轭聚合物(CP)聚{[4,4,9,9-四(4-(辛氧基)苯基-4,9-二氢-s-引达省并[1,2-B:5,6-B′]二噻吩)]-alt-co-[4,7-二(噻吩-2-基)-2,1,3-苯并噻二唑]}(PIDT-DBT)的设计和合成,其吸收和发射曲线落在远红/近红外(FR/NIR)区域内,并进一步证明其在长期体外细胞追踪和肝肿瘤生长的体内成像中的应用。在水中,PIDT-DBT-达特纳米颗粒(NP)在λ 600 nm处具有最大吸收,在λ 720 nm处具有最大发射。体外细胞示踪研究表明,PIDT-DBT-达特纳米粒可在8天内示踪HepG 2肝癌细胞。体内成像结果表明,PIDT-DBT-达特纳米颗粒可以以真实的-时间方式监测肝脏肿瘤生长超过27天。体外和体内研究均表明,PIDT-DBT-达特NP作为荧光探针上级市售Qtracker 705。这项研究首次证明了利用基于CP的荧光探针对肿瘤生长进行长期体内成像的可行性,这将鼓励开发用于体内生物成像的NIR荧光CP。
The design and synthesis is reported for a fluorescent conjugated polymer (CP), poly{[4,4,9,9‐tetrakis(4‐(octyloxy)phenyl‐4,9‐dihydro‐s‐indaceno[1,2‐b:5,6‐b′]dithiophene)]‐alt‐co‐[4,7‐di(thiophen‐2‐yl)‐2,1,3‐benzothiadiazole]} (PIDT‐DBT), with absorption and emission profiles fallen within far‐red/near infrared (FR/NIR) region and further demonstrate its application in long‐term in vitro cell tracing and in vivo imaging of liver tumor growth. PIDT‐DBT‐Tat nanoparticles (NPs) have an absorption maximum at ≈600 nm with an emission maximum at ≈720 nm in water. In vitro cell tracing studies reveal that PIDT‐DBT‐Tat NPs can trace HepG2 liver cancer cells over 8 d. In vivo imaging results indicate that PIDT‐DBT‐Tat NPs can monitor liver tumor growth for more than 27 d in a real‐time manner. Both in vitro and in vivo studies demonstrate that PIDT‐DBT‐Tat NPs are superior to commercial Qtracker 705 as fluorescent probes. This study demonstrates for the first time the feasibility for long‐term in vivo imaging of tumor growth by utilizing CP‐based fluorescent probes, which will encourage the development of NIR fluorescent CPs for in vivo bioimaging.
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