已发表论文

共载抗氧化剂 N-乙酰半胱氨酸可减弱氧化铁纳米颗粒在缺氧/复氧心肌细胞中的细胞毒性

 

Authors Shen Y, Gong S, Li J, Wang Y, Zhang X, Zheng H, Zhang Q, You J, Huang Z, Chen Y

Received 24 March 2019

Accepted for publication 26 June 2019

Published 1 August 2019 Volume 2019:14 Pages 6103—6115

DOI https://doi.org/10.2147/IJN.S209820

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Melinda Thomas

Peer reviewer comments 2

Editor who approved publication: Dr Lei Yang

Purpose: Myocardial delivery of magnetic iron oxide nanoparticles (MNPs) might produce iron overload-induced myocardial injury, and the oxidative stress was regarded as the main mechanism. Therefore, we speculated antioxidant modification might be a reasonable strategy to mitigate the toxicity of MNPs.
Methods and results: Antioxidant N-acetylcysteine (NAC) was loaded into magnetic mesoporous silica coated Fe3O4 nanoparticles. Neonatal rat hypoxia/reoxygenation (H/R) cardiomyocytes were incubated with nanoparticles for 24 hrs. NAC can effectively mitigate iron-induced oxidative injury of cardiomyocytes, evidenced by reduced production of MDA, 8-iso-PGF2α, and 8-OHDG and maintained concentrations of SOD, CAT, GSH-Px, and GSH in ELISA and biochemical tests; downregulated expression of CHOP, GRP78, p62, and LC3-II proteins in Western Blot, and less cardiomyocytes apoptosis in flow cytometric analysis.
Conclusions: NAC modifying could suppress the toxic effects of Fe3O4 nanoparticles in H/R cardiomyocytes model in vitro, indicating a promising strategy to improve the safety of iron oxide nanoparticles.
Keywords: N-acetylcysteine (NAC), iron oxide nanoparticles, oxidative stress, cardiomyocytes, hypoxia-reoxygenation




Figure 1 Characterization of the M-MSN@NAC...