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Fluorinated hydrogel nanoparticles with regulable fluorine contents and T2 relaxation times as 19F MRI contrast agents
RSC Advances ( IF 3.9 ) Pub Date : 2023-07-25 , DOI: 10.1039/d3ra02827e
Ziwei Duan 1 , Changjiang Liu 1 , Junjie Tang 1 , Ruling Zhang 1 , Danfeng Peng 2 , Ruitao Lu 2 , Zong Cao 1 , Dalin Wu 1
Affiliation  

Medical imaging contrast agents that are able to provide detailed biological information have attracted increasing attention. Among the new emerging imaging contrast agents, 19F magnetic resonance imaging contrast agents (19F MRI CAs) are extremely promising for their weak background disturbing signal from the body. However, to prepare 19F MRI CAs with a long T2 relaxation time and excellent biocompatibility in a simple and highly effective strategy is still a challenge. Herein, we report a new type of 19F MRI hydrogel nanocontrast agents (19F MRI HNCAs) synthesized by a surfactant-free emulsion polymerization with commercial fluorinated monomers. The T2 relaxation time of 19F MRI HNCA-1 was found to be 25–40 ms, guaranteeing its good imaging ability in vitro. In addition, according to an investigation into the relationship between the fluorine content and 19F MRI signal intensity, the 19F MRI signal intensity was not only determined by the fluorine content in 19F MRI HNCAs but also by the hydration microenvironment around the fluorine atoms. Moreover, 19F MRI HNCAs demonstrated excellent biocompatibility and imaging capability inside cells. The primary exploration demonstrated that 19F MRI HNCAs as a new type of 19F MRI contrast agent hold potential for imaging lesion sites and tracking cells in vivo by 19F MRI technology.

中文翻译:


具有可调节氟含量和 T2 弛豫时间的氟化水凝胶纳米颗粒作为 19F MRI 造影剂



能够提供详细生物信息的医学成像造影剂越来越受到人们的关注。在新兴的成像造影剂中, 19 F磁共振成像造影剂( 19 F MRI CAs)因其来自身体的微弱背景干扰信号而极具前景。然而,以简单且高效的策略制备具有长T 2弛豫时间和优异生物相容性的19 F MRI CA仍然是一个挑战。在此,我们报道了一种新型19 F MRI 水凝胶纳米造影剂( 19 F MRI HNCA),其通过无表面活性剂乳液聚合与商业氟化单体合成。 19 F MRI HNCA-1的T 2弛豫时间为25-40 ms,保证了其良好的体外成像能力。此外,根据氟含量与19 F MRI 信号强度关系的研究发现, 19 F MRI 信号强度不仅取决于19 F MRI HNCA 中的氟含量,还取决于氟原子周围的水化微环境。 。此外, 19 F MRI HNCA 在细胞内表现出优异的生物相容性和成像能力。 初步探索表明, 19 F MRI HNCA 作为一种新型19 F MRI 造影剂,具有通过19 F MRI 技术对病灶部位进行成像和跟踪体内细胞的潜力。
更新日期:2023-07-25
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