双路式MRI/光纳米粒子成像对比剂 针对前列腺癌
Hang Xu1,2,3, Ping Yu4, Rajendra P Bandari1,3
1Department of Radiology, University of Missouri, Columbia, MO 65212, USA.
Nanomaterials (Basel, Switzerland)
|July 26, 2024
概括
这项研究介绍了一种用于成像攻击性前列腺癌的新型双模纳米粒子. 开发的超小超偏磁铁氧化物 (USPIO) 纳米颗粒向胃素释放受体 (GRPrs),显示出高特异性和增强癌症检测的潜力.
科学领域:
- 纳米技术 纳米技术
- 生物医学成像技术 生物医学成像技术
- 在瘤学瘤学.
背景情况:
- 胃蛋白释放受体 (GRPrs) 在侵袭性前列腺癌中过度表达.
- 向成像剂对于早期和准确诊断前列腺癌至关重要.
- 开发多式模式对比剂可以提高诊断灵敏度.
研究的目的:
- 开发和描述一种新的双模磁共振成像 (MRI) /光纳米粒子对比剂.
- 针对胃素释放受体 (GRPrs) 来针对侵袭性前列腺癌的特定部位成像.
- 评估开发的纳米粒子剂的体外和体内疗效.
主要方法:
- 合成生物相容的超小超偏磁铁氧化物 (USPIO) 纳米颗粒,涂上葡萄糖和素.
- 结合USPIO纳米颗粒与Cy7.5-K-8AOC-BBN质用于GRPr向.
- 使用TEM,DLS,FTIR和MRI放松度测量的表征.
- 在前列腺癌细胞和异种移植模型中的结合特异性和成像疗效的体外和体内评估.
主要成果:
- USPIO ((Cy7.5) -BBN纳米颗粒的核心直径为~5nm,水力动力直径为~36nm.
- 高放松性 (70.2 ± 2.5 秒-1 mM-1) 和高结合亲和力 (IC50 = 2.5 ± 0.7 nM) 对GRPr.
- 在体内通过MRI显著增强瘤-肌肉对比度 (高达31.1%) 和通过NIRF成像增加光度.
结论:
- 双模USPIO ((Cy7.5)-BBN纳米颗粒对GRPr表达前列腺癌细胞具有很高的特异性.
- 开发的药物显示出有希望的潜力,用于针对性成像攻击性前列腺癌.
- 这种纳米粒子为瘤学中增强诊断能力提供了一种新的工具.
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