GPR3 in neuro-metabolic-immune-reproductive nexus - a potential therapeutic target for Multi-System diseases.
Bi-Dan Feng, Ji-Yao Qin, Qian-Qiong Qin et al.
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In 30 seconds
This systematic review examined GPR3, an orphan G-protein-coupled receptor, across neurological, metabolic, immune, and reproductive systems, drawing on a literature search of PubMed and Web of Science. The review describes GPR3 as having context-dependent effects: it promotes amyloid-β formation in Alzheimer’s disease while providing neuroprotection in Parkinson’s disease models. It also discusses possible roles in mood-related behaviours, oocyte meiotic arrest, adipose thermogenesis, and immune responses. The authors identify GPR3 as a potential therapeutic target but emphasize that its opposing effects in different disease contexts and challenges in translation require further research.
Key findings
- GPR3 was reported to promote amyloid-β formation in Alzheimer’s disease, but to provide neuroprotection in Parkinson’s disease models.
- The review links GPR3 to neuronal survival, synaptic plasticity, and microglial activity through cAMP/PKA, PI3K/Akt, and β-arrestin pathways.
- GPR3 may maintain oocyte meiotic arrest and activate thermogenic genes in adipose tissue.
- The review discusses OA and DPI as activators and AF64394 and CBD as antagonists in disease models.
Why it matters
The review brings together evidence that GPR3 may influence several physiological systems, while its effects can differ by disease context. This breadth makes it a candidate for further investigation in multisystem disorders, but also cautions against assuming that modulating the receptor would have uniformly beneficial effects across conditions.
What to keep in mind
As a systematic review, the paper synthesizes existing evidence rather than testing a clinical intervention. The abstract notes that translation challenges and GPR3’s dual roles in some pathologies remain unresolved.