Front Aging Neurosci. 2021 Nov 16;13:768156. doi: 10.3389/fnagi.2021.768156. eCollection 2021.
Role of G Protein-Coupled Receptors in Microglial Activation: Implication in Parkinson's Disease.
Frontiers in aging neuroscience
Chao Gu, Yajing Chen, Yan Chen, Chun-Feng Liu, Zengyan Zhu, Mei Wang
Affiliations
Affiliations
- Department of Pharmacy, Children's Hospital of Soochow University, Suzhou, China.
- Department of Child and Adolescent Healthcare, Children's Hospital of Soochow University, Suzhou, China.
- Department of Neurology, Suzhou Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Suzhou, China.
PMID: 34867296
PMCID: PMC8635063 DOI: 10.3389/fnagi.2021.768156
Abstract
Parkinson's disease (PD) is one of the prevalent neurodegenerative diseases associated with preferential loss of dopaminergic (DA) neurons in the substantia nigra compacta (SNc) and accumulation of α-synuclein in DA neurons. Even though the precise pathogenesis of PD is not clear, a large number of studies have shown that microglia-mediated neuroinflammation plays a vital role in the process of PD development. G protein-coupled receptors (GPCRs) are widely expressed in microglia and several of them act as regulators of microglial activation upon corresponding ligands stimulations. Upon α-synuclein insults, microglia would become excessively activated through some innate immune receptors. Presently, as lack of ideal drugs for treating PD, certain GPCR which is highly expressed in microglia of PD brain and mediates neuroinflammation effectively could be a prospective source for PD therapeutic intervention. Here, six kinds of GPCRs and two types of innate immune receptors were introduced, containing adenosine receptors, purinergic receptors, metabotropic glutamate receptors, adrenergic receptors, cannabinoid receptors, and melatonin receptors and their roles in neuroinflammation; we highlighted the relationship between these six GPCRs and microglial activation in PD. Based on the existing findings, we tried to expound the implication of microglial GPCRs-regulated neuroinflammation to the pathophysiology of PD and their potential to become a new expectation for clinical therapeutics.
Copyright © 2021 Gu, Chen, Chen, Liu, Zhu and Wang.
Keywords: G protein-coupled receptor (GPCR); Parkinson’s disease; dopaminergic (DA) neuronal loss; microglial activation; neuroinflammation
Conflict of interest statement
The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
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