Meta-analysis of brain iron levels of Parkinson's disease patients determined by postmortem and MRI measurements.
Brain iron levels in patients of Parkinson's disease (PD) are usually measured in postmortem samples or by MRI imaging including R2* and SWI. In this study we performed a meta-analysis to understand PD-associated iron changes in various brain regions, and to evaluate the accuracy of MRI detections comparing with postmortem results. Databases including Medline, Web of Science, CENTRAL and Embase were searched up to 19thNovember 2015. Ten brain regions were identified for analysis based on data extracted from thirty-three-articles. An increase in iron levels in substantia nigra of PD patients by postmortem, R2* or SWI measurements was observed. The postmortem and SWI measurements also suggested significant iron accumulation in putamen. Increased iron deposition was found in red nucleus as determined by both R2* and SWI, whereas no data were available in postmortem samples. Based on SWI, iron levels were increased significantly in the nucleus caudatus and globus pallidus. Of note, the analysis might be biased towards advanced disease and that the precise stage at which regions become involved could not be ascertained. Our analysis provides an overview of iron deposition in multiple brain regions of PD patients, and a comparison of outcomes from different methods detecting levels of iron.
Department of Neurology, the Second Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang 325000, China.|Department of Preventive Medicine, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China.
Jian-Yong
JY
Wang
Department of Neurology, the Second Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang 325000, China.
Qing-Qing
QQ
Zhuang
Department of Neurology, the Second Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang 325000, China.
Lan-Bing
LB
Zhu
Department of Neurology, the Second Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang 325000, China.
Hui
H
Zhu
Department of Neurology, the Second Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang 325000, China.
Ting
T
Li
Department of Preventive Medicine, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China.
Rui
R
Li
Department of Neurology, the Second Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang 325000, China.
Song-Fang
SF
Chen
Department of Preventive Medicine, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China.
Chen-Ping
CP
Huang
Department of Neurology, the Second Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang 325000, China.
Xiong
X
Zhang
Department of Preventive Medicine, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China.|Key Laboratory of Watershed Science and Health of Zhejiang Province, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China.
Jian-Hong
JH
Zhu
D001921:Brain / Q000000981:diagnostic imaging / Q000378:metabolism; D005260:Female; D006801:Humans; D007501:Iron / Q000378:metabolism*; D008279:Magnetic Resonance Imaging; D008297:Male; D010300:Parkinson Disease / Q000000981:diagnostic imaging / Q000378:metabolism; D011180:Postmortem Changes
D007501:Iron