LRRK2 G2019S Induces Anxiety/Depression-like Behavior before the Onset of Motor Dysfunction with 5-HT1A Receptor Upregulation in Mice

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
Juhee LimHyun Jin Choi

Abstract

Mutations in the leucine-rich repeat kinase 2 (LRRK2) gene are the most common genetic cause of Parkinson's disease (PD). The neuropathology of LRRK2 mutation-related PD, including increased dopaminergic neurodegeneration and Lewy bodies, is indistinguishable from that of idiopathic PD. The subtle nonmotor phenotypes of LRRK2 mutation-related PD have not been fully evaluated. In the present study, we examined anxiety/depression-like behaviors and accompanying neurochemical changes in differently aged transgenic (Tg) mice expressing human mutant LRRK2 G2019S. Through multiple behavioral tests, including light-dark test, elevated plus maze, sucrose preference test, forced swimming test, and tail-suspension test, we found that anxiety/depression-like behavior appeared in middle-aged (43-52 weeks) Tg mice before the onset of PD-like motor dysfunction. These behavioral tests were performed using both male and female mice, and there were no sex-related differences in behavioral changes in the middle-aged Tg mice. Along with behavioral changes, serotonin levels also significantly declined in the hippocampus of Tg mice. Additionally, increases in the expression of the 5-HT1A receptor (5-HT1AR) grew more significant with aging and were ...Continue Reading

Citations

Jan 27, 2019·The Journal of Comparative Neurology·Deanna L Benson, George W Huntley
Jun 9, 2019·Journal of Neuroinflammation·Chris RudykUNKNOWN CLINT membership
Aug 9, 2020·Frontiers in Neuroscience·Steven P SeegobinZhenyu Yue
Sep 26, 2020·Frontiers in Molecular Neuroscience·Naila Kuhlmann, Austen J Milnerwood
Dec 6, 2018·Biochemical Society Transactions·Deanna L BensonGeorge W Huntley
Jan 2, 2021·International Journal of Molecular Sciences·Kotaro SugimotoHideki Chiba
Feb 2, 2021·Journal of Parkinson's Disease·Melissa Conti MazzaMark R Cookson
Feb 23, 2021·Frontiers in Behavioral Neuroscience·Guilan HuangLijing Wang
Apr 4, 2021·International Journal of Molecular Sciences·Anastasiia BohushAnna Filipek

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