Résumé
Objective:To investigate the influence of magnetic Fe3O4 nanoparticles in the expressions of Caveolin-1 and Clathrin Heavy Chain proteins in organ tissues of the rats, and to clarify its mechanism.Methods:Twenty-four Wistar rats were randomly divided into control group, and low,medium and high doses of magnetic Fe3O4 nanoparticle groups by weights.24 h after tail vein injection of different doses of magnetic Fe3O4 nanoparticles, the organ tissues were obtained.Western blotting method was used to detect the expressions of Caveolin-1 and Clathrin Heavy Chain proteins in the main organ tissues of the rats.Real-time fluorescent quantitative PCR was used to measure the expressions of Caveolin-1 and Clathrin Heavy Chain mRNA.Results:Compared with control group,the expressions levels Clathrin Heavy Chain protein and mRNA in liver and spleen tissues of the rats in medium and high doses groups were significantly increased (P0.05).Compared with control group,the Caveolin-1 mRNA expression levels in liver, spleen, and lung tissues of the rats in low,medium and high doses groups were significantly increased (P0.05).Conclusion:Magnetic Fe3O4 nanoparticles could enhance the expressions of Clathrin Heavy Chain in the liver, spleen, and lung tissues of the rats.Endocytosis of Clathrin Heavy Chain protein is one way for magnetic Fe3O4 nanoparticles into the liver, lung, spleen cells of the rats.
Résumé
Objective To study the effects of formaldehyde on the level of microelements in mouse liver and blood and explore the microelements as biomarker in injury induced by formaldehyde.Methods The mice were randomly divided into control,low(1/40LD50),moderate(1/20LD50) and high(1/10LD50) dose groups exposed to formaldehyde by inhalation(n=20),two hours per day for three and six weeks,and than the contents of Cu,Fe,Zn and Mn in mouse liver and blood were measured.Results The contents of Fe,Zn and Mn in liver in high dose group three weeks after exposure and the contents of Fe and Zn in liver in high dose group six weeks after exposure were significantly lower than those in control group(P