无线电标记和无线电标记以及无线电标记
Kirsten E Martin1, Joseph A Mattocks2, Dariusz Śmiłowicz1
1Department of Chemistry, Stony Brook University, Stony Brook New York 11794 USA eszter.boros@stonybrook.edu.
RSC chemical biology
|June 9, 2023
概括
在温和的条件下,成功地用医疗相关的兰化物,如流-177和-132/135进行了对兰莫杜林 (LanM) 蛋白的放射性标记. 这为生物医学成像和治疗中的向放射性同位素输送开辟了新的途径.
科学领域:
- 放射化学和核医学 放射化学和核医学
- 生物结合化学 生物结合化学
- 蛋白质工程是指蛋白质工程.
背景情况:
- 放射性兰坦化物对生物医学成像和治疗具有前景.
- 有针对性的放射性同位素输送需要与生物分子兼容的稳定化系统.
- 现有的方法往往涉及恶劣的条件,不适合敏感的生物分子.
研究的目的:
- 为了证明兰莫杜林 (LanM) 的成功放射性标记与医学相关的兰化物放射性同位素.
- 评估放射性标记的LanM结构的稳定性和体内行为.
- 建立一个温和条件放射性标记策略,用于兰坦化结合蛋白.
主要方法:
- 在25°C和pH值7.7时,用-177 (177Lu),-132/135 (132/135La) 和-89 (89Zr) 放射性标记兰M.
- 采用了内源性金属结合点和外源性化剂附加标签策略.
- 在体外稳定性测试和在动物模型中的体内生物分布研究.
主要成果:
- 成功标记兰M的放射性标签,放射性化学产量达到20-82%.
- 放射性标记的结构在24小时的缓冲中显示出良好的配方稳定性 (>98%).
- 在体内研究表明,内源标记结构的骨吸收率和外源标记[89Zr]-DFO-LanM的干净率.
结论:
- 在温和的,生物分子相容的条件下,可以用医学相关的兰坦化物放射性标记兰莫杜林.
- 内源标签导致骨吸收,而外源标签使用化剂促进了不同的生物分布.
- 需要进一步稳定LanM,但这项研究为以兰他尼德为基础的放射性药物创造了先例.
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