开发用于向阿尔法疗法的Ac-doped生物相容纳米颗粒
Miguel Toro-González1, Ngozi Akingbesote1,2, Amber Bible3
1Isotope Science and Engineering Directorate, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, TN, 37830, USA.
Journal of nanobiotechnology
|June 2, 2024
概括
聚 ((乳糖-co-甘油酸) 纳米颗粒有效地封装了动-225,改善了针对性阿尔法疗法向乳腺癌细胞的输送. 这种方法增强了癌细胞死亡,并克服了用于精确放射治疗的放射性核素保留方面的挑战.
科学领域:
- 纳米医学和放射性药物化学
- 生物材料和药物输送系统
- 瘤学和辐射疗法治疗
背景情况:
- 向性阿尔法疗法 (TAT) 的目的是向癌细胞输送阿尔法发射放射性核素.
- 在TAT的挑战包括放射性核素的保留和来自竞争的离子的干扰.
- 纳米颗粒封装提供了一个潜在的解决方案,以改善放射性核素的输送和保留.
研究的目的:
- 为了利用聚-乳酸-co-糖酸) (PLGA) 纳米颗粒来封装和保留动-225 ([225Ac]Ac3+).
- 评估PLGA纳米颗粒封装 [225Ac]Ac3+在向乳腺癌细胞输送放射性核酸的有效性.
- 评估封装 [225Ac]Ac3+ 对癌细胞死亡的影响,与自由 [225Ac]Ac3+ 相比.
主要方法:
- 适应双乳液溶剂蒸发方法用于PLGA纳米粒子合成.
- 在PLGA纳米颗粒中封装 [225Ac]Ac3+ ,并与脂友性配体 ([225Ac]AcBLPhen) 进行化或不进行化.
- 在实验室中评估纳米粒子大小 (Zave),封装效率和放射性核素释放.
- 在小鼠 (E0771) 和人类 (MCF-7,MDA-MB-231) 乳腺癌细胞系中评估 [225Ac]Ac3+输送和癌细胞死亡.
主要成果:
- 平均尺寸为155.3nm的PLGA纳米粒子已经成功地准备好.
- 将 [225Ac]Ac3+ 化为 [225Ac]AcBLPhen 显著降低了放射性核酸释放 (<2%) 和衰变女儿释放 (<50%).
- 封装了 [225Ac]AcBLPhen 的 PLGA 纳米颗粒证明了 [225Ac]Ac3+ 的向乳腺癌细胞的增强传递.
- 封装 [225Ac]Ac3+ 与自由 [225Ac]Ac3+ 相比,观察到癌细胞死亡的显著增加.
结论:
- PLGA纳米粒子作为一个有前途的平台,用于封装和输送 [225Ac]Ac3+ 针对性阿尔法疗法.
- 在PLGA纳米颗粒中封装改善了放射性核素的保留,并增强了对乳腺癌细胞的治疗疗效.
- 这种方法提供了一种方法来重新利用溶解性或亲和力较差的配体,用于向的α疗法.
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