Open AccessConnectivity of corticostriatal circuits in nonmanifesting LRRK2 G2385R and R1628P carriers
Author(s) -
Zhang Dongling,
Yao Junye,
Ma Jinghong,
Gao Linlin,
Sun Junyan,
Fang Jiliang,
He Hongjian,
Wu Tao
Publication year - 2022
Publication title -
cns neuroscience and therapeutics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.403
H-Index - 69
eISSN - 1755-5949
pISSN - 1755-5930
DOI - 10.1111/cns.13933
Subject(s) - lrrk2 , striatum , neuroscience , parkinson's disease , biological neural network , biology , medicine , psychology , disease , dopamine
Background Neuroimaging studies have shown that the functional connectivity (FC) of corticostriatal circuits in nonmanifesting leucine‐rich repeat kinase 2 (LRRK2) G2019S mutation carriers mirrors neural changes in idiopathic Parkinson's disease (PD). In contrast, neural network changes in LRRK2 G2385R and R1628P mutations are unclear. We aimed to investigate the FC of corticostriatal circuits in nonmanifesting LRRK2 G2385R and R1628P mutation carriers (NMCs). Methods Twenty‐three NMCs, 28 PD patients, and 29 nonmanifesting noncarriers (NMNCs) were recruited. LRRK2 mutation analysis was performed on all participants. Clinical evaluation included MDS‐UPDRS. Results When compared to NMNCs, NMCs showed significantly reduced FC between the caudate nucleus and superior frontal gyrus and cerebellum, and between the nucleus accumbens and parahippocampal gyrus, amygdala, and insula. We also found increased striatum‐cortical FC in NMCs. Conclusions Although the corticostriatal circuits have characteristic changes similar to PD, the relatively intact function of the sensorimotor striatum‐cortical loop may result in less possibility of developing parkinsonian motor symptoms for the NMCs. This study helps explain why LRRK2 G2385R and R1628P mutations are risk factors rather than pathogenic mutations for PD and suggests that various LRRK2 mutations have distinct effects on neural networks.