Well-defined cross-linked antioxidant nanozymes for treatment of ischemic brain injury.

Well-defined cross-linked antioxidant nanozymes for treatment of ischemic brain injury.
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DOI:
10.1016/j.jconrel.2012.07.044
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发表时间:
2012-09-28
期刊:
Journal of controlled release : official journal of the Controlled Release Society
影响因子:
--
通讯作者:
Kabanov AV
Kabanov AV
中科院分区:
其他
文献类型:
--
作者:
Manickam DS;Brynskikh AM;Kopanic JL;Sorgen PL;Klyachko NL;Batrakova EV;Bronich TK;Kabanov AV

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Development of well-defined nanomedicines is critical for their successful clinical translation. A simple synthesis and purification procedure is established for chemically cross-linked polyion complexes of Cu/Zn superoxide dismutase (SOD1) or catalase with a cationic block copolymer, methoxy-poly(ethylene glycol)-block-poly(L-lysine hydrochloride) (PEG-pLL50). Such complexes, termed cross-linked nanozymes (cl-nanozymes) retain catalytic activity and have narrow size distribution. Moreover, their cytotoxicity is decreased compared to non-cross-linked complexes due to suppression of release of the free block copolymer. SOD1 cl-nanozymes exhibit prolonged ability to scavenge experimentally induced reactive oxygen species (ROS) in cultured brain microvessel endothelial cells and central neurons. In vivo they decrease ischemia/reperfusion-induced tissue injury and improve sensorimotor functions in a rat middle cerebral artery occlusion (MCAO)model after a single intravenous (i.v.) injection. Altogether, well-defined cl-nanozymes are promising modalities for attenuation of oxidative stress after brain injury.
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