α-Synuclein Up-regulates Monoamine Oxidase A Expression and Activity Trans-Acting Transcription Factor 1

Overview

Journal Front Aging Neurosci

Specialty Geriatrics

Date 2021 Apr 5

PMID 33815093

Citations 8

Authors

Congcong Jia

Cheng Cheng

Tianbai Li

Xi Chen

Yuting Yang

Xinyao Liu

Song Li

Weidong Le

Affiliations

Soon will be listed here.

Abstract

Abnormal α-Synuclein (α-SYN) aggregates are the pathological hallmarks of Parkinson's disease (PD), which may affect dopamine (DA) neuron function and DA metabolism. Monoamine oxidase A (MAOA) is an enzyme located on the outer mitochondrial membrane that catalyzes the oxidative deamination of DA. Both α-SYN and MAOA are associated with PD pathogenesis, suggesting possible crosstalk between these two molecules. In the present study, we aimed to investigate the potential impacts of α-SYN on MAOA function and further explore the underlying mechanisms. Our study showed that overexpression of α-SYN [both wild-type (WT) and A53T] increased MAOA function upregulating its expression without impacting MAOA stability. Overexpression of α-SYN or α-SYN enhanced the transcription activity of the MAOA promoter region containing the binding sites of cell division cycle associated 7 like (R1, a transcriptional repressor of MAOA) and trans-acting transcription factor 1 (Sp1, a transcription factor of MAOA). Interestingly, α-SYN selectively increased Sp1 expression, thereby enhancing the binding capacity of Sp1 with MAOA promoter to increase MAOA expression. Taken together, our findings demonstrate that α-SYN can upregulate MAOA expression modulation of Sp1 and may shed light on future studies of α-SYN associated PD pathogenesis.

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