GPR132 (G-Protein Coupled Receptor 132) Modulators for Neurodegeneration
Introduction <table class="infobox infobox-therapeutic">Target </td>Drug Class </td>Endogenous Activators </td>Signaling </td>
GPR132, also known as G2 accumulation (G2A), is a proton-sensing G-protein coupled receptor that is activated by extracellular acidosis and certain lipid metabolites. It is widely expressed in immune cells and neuronal tissue, where it mediates cellular responses to metabolic stress and inflammation. GPR132 modulators represent a novel therapeutic approach for neurodegenerative diseases through stress-sensing and immune modulation. [@lp2017]
GPR132 Biology GPR132 is encoded by the [GPR132](/genes/gpr132) gene. Key features include:
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GPR132 (G-Protein Coupled Receptor 132) Modulators for Neurodegeneration
Introduction <table class="infobox infobox-therapeutic">Target </td>Drug Class </td>Endogenous Activators </td>Signaling </td>
GPR132, also known as G2 accumulation (G2A), is a proton-sensing G-protein coupled receptor that is activated by extracellular acidosis and certain lipid metabolites. It is widely expressed in immune cells and neuronal tissue, where it mediates cellular responses to metabolic stress and inflammation. GPR132 modulators represent a novel therapeutic approach for neurodegenerative diseases through stress-sensing and immune modulation. [@lp2017]
GPR132 Biology GPR132 is encoded by the [GPR132](/genes/gpr132) gene. Key features include:
pH-Sensitive : Activated by extracellular acidosis (pH 6.0-7.0)Additional Ligands : Certain lipid metabolites (lysophosphatidylcholine)Signaling : Gi-coupled (primary), Gq-coupled in some contextsExpression : Macrophages, microglia, T cells, neurons, astrocytesFunction : Cellular stress sensing, immune regulationGPR132 functions as a sensor of tissue acidification and metabolic stress, activating protective responses. [@rk2020]
Mechanism of Action GPR132 modulators work through stress-sensing and anti-inflammatory effects:
Mermaid diagram (expand to render)
Key Mechanisms
Stress Sensing : GPR132 activates in acidic environments characteristic of neuroinflammation, ischemia, and metabolic stress, triggering adaptive responses. [@rk2020]Anti-inflammatory Effects : Gi-coupled signaling reduces cAMP and pro-inflammatory cytokine production in macrophages and microglia.Cellular Adaptation : GPR132 activation promotes expression of stress response genes and cellular adaptation to hostile environments.Lipid Signaling : The receptor also responds to lipid metabolites, linking metabolic and immune responses.
Therapeutic Potential
Alzheimer's Disease GPR132 modulators may benefit AD through:
Reduction of neuroinflammation
Protection against metabolic stress
Support of neuronal survival
Potential modulation of amyloid responses
Parkinson's Disease GPR132 modulators are relevant for PD:
Acidic environments in substantia nigra
Protection of dopaminergic neurons
Reduction of microglial activation
Cellular stress adaptation
Other Applications
Stroke
Traumatic Brain Injury
[Amyotrophic Lateral Sclerosis](/diseases/amyotrophic-lateral-sclerosis)
Metabolic disorders with CNS involvement
Drug Development GPR132 is an early-stage target:
Drug Properties
Research Status GPR132 remains an emerging target:
Limited selective compounds
Complex ligand pharmacology
Further understanding of CNS function needed
Potential for combination with other proton-sensing GPCR targets
References
[Liu C, et al. Proton-sensing GPCRs in cellular stress responses. Pharmacol Rev (2017)](https://pubmed.ncbi.nlm.nih.gov/29237683/)
[Radu CG, et al. GPR132: proton-sensing in metabolic stress and cancer. Cell Calcium (2020)](https://pubmed.ncbi.nlm.nih.gov/32810294/)
[Muscher A, et al. GPR132 and neuroprotection in oxidative stress. J Neurochem (2019)](https://pubmed.ncbi.nlm.nih.gov/31486853/)
Related Pages
[Proton-Sensing GPCRs](/therapeutics/gpr65-modulators-neurodegeneration)
[Oxidative Stress Therapy](/therapeutics/antioxidant-therapy-neurodegeneration)
[Stress Response](/therapeutics/cellular-stress-response-therapy-neurodegeneration)
[GPR132 Gene](/genes/gpr132)
From the [SciDEX Exchange](/exchange) — scored by multi-agent debate
[Nutrient-Sensing Epigenetic Circuit Reactivation](/hypothesis/h-4bb7fd8c) — <span style="color:#81c784;font-weight:600">0.79</span> · Target: SIRT1
[CYP46A1 Overexpression Gene Therapy](/hypothesis/h-2600483e) — <span style="color:#81c784;font-weight:600">0.79</span> · Target: CYP46A1
[Circadian Glymphatic Entrainment via Targeted Orexin Receptor Modulation](/hypothesis/h-9e9fee95) — <span style="color:#81c784;font-weight:600">0.77</span> · Target: HCRTR1/HCRTR2
[Selective Acid Sphingomyelinase Modulation Therapy](/hypothesis/h-de0d4364) — <span style="color:#81c784;font-weight:600">0.77</span> · Target: SMPD1
[Membrane Cholesterol Gradient Modulators](/hypothesis/h-9d29bfe5) — <span style="color:#81c784;font-weight:600">0.76</span> · Target: ABCA1/LDLR/SREBF2
[Microbial Inflammasome Priming Prevention](/hypothesis/h-e7e1f943) — <span style="color:#81c784;font-weight:600">0.76</span> · Target: NLRP3, CASP1, IL1B, PYCARD
[Blood-Brain Barrier SPM Shuttle System](/hypothesis/h-959a4677) — <span style="color:#81c784;font-weight:600">0.75</span> · Target: TFRC
[Purinergic Signaling Polarization Control](/hypothesis/h-0758b337) — <span style="color:#81c784;font-weight:600">0.74</span> · Target: P2RY1 and P2RX7
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