开发放射性蛋白-1延长释放配方,用于缓解胃肠急性辐射综合征
Radiation research
|January 27, 2026
概括
一种新的Radioprotectin-1 (RP-1) 微乳液配方显著改善了急性辐射综合征 (ARS) 的存活率,用更少的剂量. 这种延长释放配方为大规模伤亡辐射事件治疗提供了有前途的选择.
科学领域:
- 辐射生物学 辐射生物学
- 药理学 药理学是指药理学的学科.
- 药物输送系统 药物输送系统
背景情况:
- 高剂量的电离辐射会诱导DNA损伤,导致细胞死亡和急性辐射综合征 (ARS).
- lysophosphatidic 酸受体亚型 2 (LPAR2) 激活是减轻辐射损伤的已知机制.
- 放射性蛋白-1 (RP-1) 是一种强大的LPAR2特异性激动剂,此前在ARS治疗的水性配方中已经显示出有效性.
研究的目的:
- 开发和评估RP-1的延长释放微乳液 (ME) 配方,以改善大规模伤亡者的现场治疗.
- 评估RP-1ME配方在缓解辐射诱导损伤和改善ARS模型中的存活率方面的有效性.
- 阐明RP-1介导辐射保护的基础分子机制.
主要方法:
- 开发了RP-1的水在油在水 (W/O/W) 多层微乳液 (ME) 配方.
- 用小鼠和非人类灵长类动物 (NHP) 进行的药理动力学研究,将ME与水性 (AQ) 配方进行比较.
- 在照射和RP-1ME治疗后,对小鼠胃肠道ARS (GI-ARS) 模型的生存率的评估.
- 肠道密室的组织学分析和对辐射细胞中支持生存的激酶激活 (ERK1/2,Akt) 和亡的评估.
主要成果:
- 与AQ配方相比,RP-1 ME配方显示显著延长了血半衰期,平均停留时间和暴露时间.
- 在GI-ARS模型中,RP-1 ME仅使用两次皮下注射 (24小时和72小时辐射后) 提供了显著的生存优势.
- RP-1 ME治疗保护了肠道密室,并在辐射后的第五天增加了活跃再生的密室.
- 在被辐射的细胞中,RP-1激活了支持生存的基因酶ERK1/2和Akt,并减少了caspase介导的亡.
结论:
- 延长释放RP-1ME配方是一种可行的和有效的策略,可以减轻辐射损伤并改善ARS中的生存率.
- 这种新的配方由于其简化剂量方案,为大规模伤亡的现场治疗提供了实际优势.
- 通过RP-1-介导的LPAR2激活,通过持续的亲生存信号和减少的亡,赋予辐射保护.
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