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A liver-targeting Cu(i) chelator relocates Cu in hepatocytes and promotes Cu excretion in a murine model of Wilson's disease.
Metallomics ( IF 2.9 ) Pub Date : 2020-05-05 , DOI: 10.1039/d0mt00069h
Marie Monestier 1 , Anaïs M Pujol 1 , Aline Lamboux 2 , Martine Cuillel 3 , Isabelle Pignot-Paintrand 4 , Doris Cassio 5 , Peggy Charbonnier 3 , Khémary Um 3 , Amélie Harel 3 , Sylvain Bohic 6 , Christelle Gateau 7 , Vincent Balter 2 , Virginie Brun 8 , Pascale Delangle 7 , Elisabeth Mintz 3
Affiliation  

Copper chelation is the most commonly used therapeutic strategy nowadays to treat Wilson's disease, a genetic disorder primarily inducing a pathological accumulation of Cu in the liver. The mechanism of action of Chel2, a liver-targeting Cu(I) chelator known to promote intracellular Cu chelation, was studied in hepatic cells that reconstitute polarized epithelia with functional bile canaliculi, reminiscent of the excretion pathway in the liver. The interplay between Chel2 and Cu localization in these cells was demonstrated through confocal microscopy using a fluorescent derivative and nano X-ray fluorescence. The Cu(I) bound chelator was found in vesicles potentially excreted in the canaliculi. Moreover, injection of Chel2 either intravenously or subcutaneously to a murine model of Wilson's disease increased excretion of Cu in the faeces, confirming in vivo biliary excretion. Therefore, Chel2 turns out to be a possible means to collect and excrete hepatic Cu in the faeces, hence restoring the physiological pathway.

中文翻译:

肝脏靶向 Cu(i) 螯合剂在肝细胞中重新定位 Cu 并促进威尔森氏病小鼠模型中的 Cu 排泄。

铜螯合是当今治疗威尔森氏病最常用的治疗策略,威尔逊氏病是一种主要诱导肝脏中铜的病理性积累的遗传性疾病。Chel2 是一种已知可促进细胞内 Cu 螯合的肝脏靶向 Cu( I ) 螯合剂,在肝细胞中研究了其作用机制,这些肝细胞重建了具有功能性胆小管的极化上皮,这让人联想到肝脏中的排泄途径。这些细胞中 Chel2 和 Cu 定位之间的相互作用通过共聚焦显微镜使用荧光衍生物和纳米 X 射线荧光来证明。铜() 结合螯合剂被发现存在于小管中可能排泄的囊泡中。此外,将 Chel2 静脉内或皮下注射到威尔森氏病的小鼠模型中会增加粪便中铜的排泄,证实了体内胆汁排泄。因此,Chel2 被证明是收集和排泄粪便中肝脏铜的可能手段,从而恢复生理途径。
更新日期:2020-06-25
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