人类ABC和SLC传送器:对不特定的PSMA-617摄入负责的罪祸首?
Harun Taş1, Gábor Bakos1, Ulrike Bauder-Wüst1
1German Cancer Research Center (DKFZ), Research Group Molecular Biology of Systemic Radiotherapy, Im Neuenheimer Feld 280, 69120 Heidelberg, Germany.
Pharmaceuticals (Basel, Switzerland)
|April 27, 2024
概括
这项研究调查了[177Lu]Lu-PSMA-617和 [225Ac]Ac-PSMA-617是否受到ABC和SLC载体的影响. 结果表明,这些载体在唾液腺和脏中对这些PSMA向放射性连接体的吸收或毒性没有作用.
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
- 分子成像和分子疗法
背景情况:
- [177Lu]Lu-PSMA-617 (Pluvicto®) 已被批准用于前列腺癌,但会引起唾液腺和脏的毒性.
- 这些器官中PSMA向放射性对象的吸收和保留机制尚未完全理解.
- 在人类的唾液腺和脏中存在各种ATP结合盒 (ABC) 和溶液载体 (SLC) 载体.
研究的目的:
- 为了确定[177Lu]Lu-PSMA-617和 [225Ac]Ac-PSMA-617是否是关键的ABC和SLC载体的基质或抑制剂.
- 阐明这些载体在PSMA向的放射性连接体在唾液腺和脏的吸收和保留中的作用.
主要方法:
- 使用表达人类ABC和SLC载体的细胞系和囊泡进行体外研究.
- 研究了[177Lu]Lu-PSMA-617和 [225Ac]Ac-PSMA-617的抑制和吸收,使用一种新的放射性标记同位素 ([α,β-3H]Nal) Lu-PSMA-617.
- 使用相应的探头基板和参考抑制剂作为对照.
主要成果:
- 发现[177Lu]Lu-PSMA-617和 [225Ac]Ac-PSMA-617既不是检查的ABC和SLC载体的抑制剂,也不是其基质.
- 这些载体不会影响研究的PSMA向放射性连接体的吸收或保留.
结论:
- 人类的ABC和SLC载体在唾液腺和脏中没有中心参与[177Lu]Lu-PSMA-617和 [225Ac]Ac-PSMA-617的吸收和保留.
- 这些载体不能解释与这些放射性连接体相关的观察到的毒性.
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