AUTHOR=Zhang Dongling , Yao Junye , Sun Junyan , Wang Junling , Chen Lili , He Hongjian , Wu Tao 

TITLE=Iron accumulation in the ventral tegmental area in Parkinson's disease

JOURNAL=Frontiers in Aging Neuroscience

VOLUME=Volume 15 - 2023

YEAR=2023

URL=https://www.frontiersin.org/journals/aging-neuroscience/articles/10.3389/fnagi.2023.1187684

DOI=10.3389/fnagi.2023.1187684

ISSN=1663-4365

ABSTRACT=The ventral tegmental area (VTA) is less affected compared to substantia nigra pars compacta (SNc) in Parkinson’s disease (PD). This study aimed to quantitatively evaluate iron content in the VTA across different stages of PD in order to help explain the selective loss of dopamine neurons in PD. Quantitative susceptibility mapping (QSM) data were obtained from 101 PD patients, 35 idiopathic rapid eye movement sleep behavior disorder (RBD) patients and 62 healthy controls (HC). The mean QSM values in the VTA and SNc were calculated and compared among the groups. Both RBD and PD patients had increased iron values in the bilateral SNc compared with HC. RBD and PD patients at Hoehn-Yahr (H&Y) stage 1 did not show elevated iron values in the VTA, while PD patients with more than 1.5 of H&Y staging had increased iron values in bilateral VTA compared to HC. This study shows there is no increased iron accumulation in the VTA during the prodromal and early clinical stages of PD, but iron deposition increases significantly as the disease becomes more severe.