52的PET成像Mn标有DOTATATE和DOTAJR11的标签
James M Omweri1,2, Hailey A Houson1, Shannon E Lynch1,3
1Department of Radiology, The University of Alabama at Birmingham, Birmingham, USA.
Scientific reports
|January 18, 2025
概括
标有DOTATATE的-52在神经内分泌瘤模型中显示出比DOTA-JR11更高的瘤吸收和内化. 这突显了52Mn-DOTATATE在PET成像和治疗开发中的潜力.
科学领域:
- 核医学是一种核医学.
- 放射性药物化学 放射性药物化学
- 瘤学成像成像 瘤学成像成像
背景情况:
- -52 (52Mn) 是PET成像的一个有前途的同位素.
- 索马托斯塔丁受体2 (SSTR2) 是神经内分泌瘤 (NETs) 的一个关键标.
- [68Ga]Ga-DOTATATE (激动剂) 和[68Ga]Ga-DOTA-JR11 (对抗剂) 是已确定的SSTR2成像剂.
研究的目的:
- 在放射性标记DOTATATE和DOTA-JR11中,具有52Mn.
- 为了比较52Mn-DOTATATE和52Mn-DOTA-JR11的体外和体内性能.
- 评估它们对SSTR2阳性NET的PET成像潜力.
主要方法:
- 对DOTATATE和DOTA-JR11的放射性标记使用52Mn.
- 在小鼠血清中的体外稳定性测试.
- 在SSTR2+AR42J细胞中进行细胞吸收和内化研究.
- 在携带AR42J异种移植的小鼠体内生物分布和PET成像.
主要成果:
- 这两种辐射追踪剂都显示出对SSTR2.2的亲和力.
- 与[52Mn]Mn-DOTA-JR11 (7.31%/mg和20.85%) 相比,[52Mn]Mn-DOTATATE的细胞吸收率 (11.95%/mg) 和内化率 (53.13%) 更高.
- 在注射后4小时,PET成像显示[52Mn]Mn-DOTATATE (11.16% ID/g) 与[52Mn]Mn-DOTA-JR11 (2.11% ID/g) 的瘤吸收显著更高.
结论:
- 52Mn标记的DOTATATE和DOTA-JR11可以用高放射性化学产量进行合成.
- [52Mn]Mn-DOTATATE与[52Mn]Mn-DOTA-JR11.11相比,表现出优越的细胞吸收,内化和瘤向.
- 这些发现支持开发52Mn-DOTATATE用于增强PET成像和在NET中的潜在治疗应用.
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