＜正＞Increased nigral iron levels and intracytoplasmic Lewy bodies（LBs） in the degenerating neurons are found in...
Hong JIANG~*,Qing HE,Wen-Jing LI,Ning SONG,Jun-Xia XIE~* Department of Physiology,Shandong Provincial Key Laboratory of Pathogenesis and Prevention of Neurological Disorders and State Key Disciplines:Physiology,Medical College of Qingdao University,Qingdao 266071,China
Objective Intracellular formation of Lewy body （LB） is one of the hallmarks of Parkinson’s disease.The main component of LB is aggregatedα-synuclein,present in the substantia nigra where iron accumulation also occurs.The present study was aimed to study the relationship between iron andα-synuclein aggregation.Methods SK-N-SH cells were treated with different concentrations of ferric iron for 24 h or 48 h.MTT assay was conducted to determine the cell viability. Thioflavine S staining was used to detectα-synuclein aggregation.Results With the increase of iron concentration,the cell viability decreased significantly.At the concentrations of 5 mmol/L and 10 mmol/L,iron inducedα-synuclein aggregation more severely than at the concentration of 1 mmol/L.Besides,48-h treatment-induced aggregation was more severe than that induced by 24-h treatment,at the corresponding iron concentrations.Conclusion Ferric iron can induceα-synuclein aggregation,which is toxic to the cells,in a dose-and time-dependent way.
