GO:0086103 G protein-coupled receptor signaling pathway involved in heart process: Cardiac GPCR Signaling, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0086103 describes a G protein-coupled receptor signaling pathway that contributes to a circulatory system process carried out by the heart [1, 2, 5].
• Cardiac GPCR signaling is essential for heart rate, contractility, and adaptation to stress, and its dysregulation underlies heart failure and arrhythmias [4, 5, 8].
• Key receptors include ADRB1, ADRB2, and AGTR1, which couple to Gs, Gi, and Gq proteins to modulate cardiac function [4, 5, 8].
• GRK2 and β-arrestin-1 are central regulators that desensitize GPCRs and can be targeted therapeutically [4, 5, 7].
• CRISPR knockout, point mutation, and knock-in models enable precise dissection of GPCR signaling in cardiomyocytes [4, 5].
• EDITGENE provides custom cell models and library screening to study cardiac GPCR pathways at scale [4, 5].
Description
G protein-coupled receptors (GPCRs) constitute the largest family of cell surface receptors and mediate diverse physiological responses, including those in the heart [1, 2]. The Gene Ontology term GO:0086103, G protein-coupled receptor signaling pathway involved in heart process, defines a signaling cascade initiated by GPCRs that contributes to a circulatory system process carried out by the heart. This term encompasses the molecular events from ligand binding to downstream effectors that regulate cardiac contractility, heart rate, and adaptation to stress [4, 5, 8]. Understanding this pathway is critical because its dysregulation is implicated in heart failure, arrhythmias, and hypertension [4, 5, 8]. Researchers study this process using genetic models, pharmacological tools, and biochemical assays to identify therapeutic targets [4, 5, 7].
G protein-coupled receptor signaling pathway involved in heart process At A Glance
| GO ID | GO:0086103 |
|---|---|
| GO term | G protein-coupled receptor signaling pathway involved in heart process |
| Ontology | biological_process |
| Synonym | GPCR signaling pathway involved in cardiac process; GPCR signaling pathway involved in heart process; G-protein coupled receptor signaling pathway involved in heart process; G-protein coupled receptor signalling pathway involved in heart process |
| Major function | Mediates GPCR-initiated signaling that regulates cardiac contractility, heart rate, and stress responses [4, 5, 8] |
| Key receptors | ADRB1, ADRB2, AGTR1, and others [4, 5, 8] |
| Key regulators | GRK2, β-arrestin-1, and G protein subunits [4, 5, 7] |
| Associated diseases | Heart failure, arrhythmias, hypertension [4, 5, 8] |
What Is GO:0086103?
GO:0086103 is a biological process term that describes a G protein-coupled receptor signaling pathway which contributes to a circulatory system process carried out by the heart. It includes the binding of ligands such as catecholamines or angiotensin II to GPCRs, activation of heterotrimeric G proteins, and downstream signaling events that modulate cardiac function [4, 5, 8].
Why Is G protein-coupled receptor signaling pathway involved in heart process Important in Cell Biology?
GO:0086103 is important because GPCR signaling in the heart controls fundamental physiological processes such as heart rate and contractility, and its dysfunction is a hallmark of cardiovascular disease [4, 5, 8]. Targeting this pathway has proven therapeutic value, as evidenced by beta-blockers and angiotensin receptor blockers [5, 8]. Moreover, regulators like GRK2 and β-arrestin-1 offer new avenues for intervention in heart failure [4, 5, 7].
• Regulates cardiac contractility and heart rate through β-adrenergic receptors [4, 8].
• Mediates angiotensin II effects on blood pressure and cardiac remodeling.
• GRK2 desensitizes GPCRs and is upregulated in heart failure [5, 7].
• β-arrestin-1 signaling can be cardioprotective via AMPK activation.
• Dysregulation leads to arrhythmias, hypertrophy, and heart failure [4, 5, 8].
• Provides targets for beta-blockers and ARBs [5, 8].
• Involved in inflammation and fibrosis through chemokine receptors [3, 7].
• CRISPR models enable precise genetic dissection of GPCR pathways [4, 5].
What Happens During G protein-coupled receptor signaling pathway involved in heart process?
Ligand Binding and Receptor Activation
In simple terms: A molecule like adrenaline binds to a receptor on heart cells, turning it on.
Cardiac GPCR signaling begins with ligand binding to receptors such as β1-adrenergic receptor (ADRB1) or angiotensin II receptor type 1 (AGTR1) [4, 5, 8]. This induces conformational changes that activate heterotrimeric G proteins.
G Protein Activation and Effector Modulation
In simple terms: The activated receptor turns on G proteins, which then regulate enzymes that control heart function.
Activated Gs stimulates adenylyl cyclase to produce cAMP, enhancing cardiac contractility, while Gi inhibits it [4, 8]. Gq activates phospholipase C, leading to calcium release and hypertrophy.
Receptor Desensitization and Internalization
In simple terms: After signaling, the receptor is turned off and pulled inside the cell to prevent overstimulation.
G protein-coupled receptor kinases (GRKs), particularly GRK2, phosphorylate activated receptors, promoting β-arrestin binding and desensitization [5, 7]. β-arrestin also initiates internalization and alternative signaling [4, 5].
Downstream Signaling and Cardiac Outcomes
In simple terms: The signals change how heart cells contract and grow, affecting heart function.
Downstream effectors modulate calcium handling, gene expression, and metabolism [4, 5]. For example, β-arrestin-1 phosphorylation by AMPK alters β-adrenergic signaling and protects against cardiac injury.
Key Genes Involved in GO:0086103 G protein-coupled receptor signaling pathway involved in heart process
The following genes encode receptors, G proteins, and regulators that are central to GO:0086103.
| Gene | Major Role | Research Relevance |
|---|---|---|
| ADRB1 | β1-adrenergic receptor; mediates catecholamine effects on heart rate and contractility | Target of beta-blockers; knockout models show altered cardiac function [4, 8] |
| ADRB2 | β2-adrenergic receptor; modulates cardiac contractility and relaxation | Polymorphisms linked to heart failure; CRISPR models available [5, 8] |
| AGTR1 | Angiotensin II receptor type 1; regulates blood pressure and cardiac hypertrophy | Target of ARBs; knockout reduces fibrosis |
| GRK2 | G protein-coupled receptor kinase 2; desensitizes GPCRs | Upregulated in heart failure; therapeutic target [5, 7] |
| GRK5 | G protein-coupled receptor kinase 5; regulates cardiac GPCRs | Implicated in hypertrophy; genetic models exist [5, 7] |
| ARRB1 | β-arrestin-1; scaffolds signaling and desensitization | Cardioprotective via AMPK; phosphorylation site Ser330 |
| ARRB2 | β-arrestin-2; regulates GPCR internalization | Modulates cardiac inflammation |
| GNAS | Gs alpha subunit; activates adenylyl cyclase | Mutations cause disease; knockout lethal |
| GNAI2 | Gi alpha subunit; inhibits adenylyl cyclase | Modulates heart rate; knockout models |
| GNAQ | Gq alpha subunit; activates phospholipase C | Mediates hypertrophy; conditional knockout |
| CXCR4 | Chemokine receptor; involved in cardiac fibrosis | Target for fibrosis; knockout reduces injury |
| CXCL12 | Ligand for CXCR4; promotes fibrosis | Overexpression models |
| CALCRL | Calcitonin receptor-like receptor; mediates CGRP effects | Role in cardiac protection |
| RAMP1 | Receptor activity-modifying protein 1; modulates CALCRL | Knockout affects CGRP signaling |
| OXTR | Oxytocin receptor; cardiac effects | Knockout models available |
| OPRM1 | Mu opioid receptor; cardiac protection | Knockout alters response to opioids |
| ADORA1 | Adenosine A1 receptor; cardioprotection | Knockout increases injury |
| PTGER2 | Prostaglandin E2 receptor; cardiac inflammation | Knockout models |
How Is G protein-coupled receptor signaling pathway involved in heart process Regulated?
Cardiac GPCR signaling is tightly regulated by GRKs and β-arrestins, which desensitize receptors and initiate internalization [5, 7]. GRK2 expression is elevated in heart failure, contributing to impaired β-adrenergic signaling. AMPK phosphorylates β-arrestin-1 at Ser330 to attenuate β-adrenergic receptor-induced cardiac injury. Additionally, receptor activity-modifying proteins (RAMPs) modulate receptor trafficking and pharmacology.
G protein-coupled receptor signaling pathway involved in heart process and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| ADRB1 | Heart failure, arrhythmia | Knockout and point-mutation cardiomyocytes [4, 8] |
| GRK2 | Heart failure | Overexpression and knockout models [5, 7] |
| ARRB1 | Cardiac injury | Phospho-mutant knock-in (Ser330) |
| AGTR1 | Hypertension, fibrosis | Knockout and overexpression |
| CXCR4 | Cardiac fibrosis | Knockout and ligand overexpression |
Heart Failure
Chronic overstimulation of β-adrenergic receptors leads to desensitization and reduced contractility, hallmarks of heart failure [4, 5, 8]. GRK2 upregulation further impairs signaling.
Arrhythmias
Altered GPCR signaling, particularly through β-adrenergic and angiotensin receptors, can trigger arrhythmias by affecting ion channels and calcium handling [4, 5].
Cardiac Fibrosis
Chemokine receptors such as CXCR4 and angiotensin receptors promote fibrosis through GPCR signaling [3, 5].
From G protein-coupled receptor signaling pathway involved in heart process-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does ADRB1 mediate cardiac contractility? | ADRB1 knockout cardiomyocytes [4, 8] |
| How does GRK2 desensitization affect heart failure? | GRK2 overexpression and knockout [5, 7] |
| What is the role of β-arrestin-1 Ser330 phosphorylation? | Point mutation (S330A) knock-in |
| Can AGTR1 signaling be modulated? | AGTR1 knockout and tagged knock-in |
| Does CXCR4 promote fibrosis? | CXCR4 knockout and CXCL12 overexpression |
| Is OXTR involved in cardiac function? | OXTR knockout |
How to Study the G protein-coupled receptor signaling pathway involved in heart process Process
| Method | What It Measures | Typical Application |
|---|---|---|
| CRISPR knockout | Gene function loss | ADRB1 knockout cardiomyocytes [4, 8] |
| Point mutation knock-in | Specific amino acid function | ARRB1 S330A |
| cAMP assay | Gs/Gi activity | β-adrenergic signaling |
| Calcium imaging | Gq signaling | AGTR1 function |
| RNA-seq | Transcriptional changes | GRK2 overexpression |
| Proteomics | Protein interactions | β-arrestin complexes |
| Western blot | Protein expression | GRK2 levels |
| Contractility assay | Cardiac function | ADRB1 mutants |
CRISPR-Cas9 Genome Editing
CRISPR knockout, point mutation, and knock-in models allow precise manipulation of GPCR genes in cardiomyocytes and animal models [4, 5].
Biochemical Assays
cAMP, calcium, and phosphorylation assays measure GPCR signaling activity [4, 5].
Transcriptomics and Proteomics
RNA-seq and proteomics reveal downstream gene expression and protein interactions [5, 7].
Imaging and Functional Studies
Live-cell imaging and contractility measurements assess cardiac function [4, 8].
How CRISPR Can Be Used to Study GO:0086103 G protein-coupled receptor signaling pathway involved in heart process
Knockout
CRISPR knockout of ADRB1 or GRK2 in cardiomyocytes ablates protein expression, revealing their roles in cardiac contractility and desensitization [4, 5, 8].
Point Mutation
Point mutations such as ARRB1 S330A knock-in dissect phosphorylation-dependent signaling and cardioprotection.
Knock-in
Tagged knock-in of AGTR1 allows tracking receptor localization and interactions in heart tissue.
Overexpression
Overexpression of GRK2 or CXCL12 mimics pathological states and tests therapeutic interventions [3, 5].
How EDITGENE Supports G protein-coupled receptor signaling pathway involved in heart process Research
Researchers studying G protein-coupled receptor signaling pathway involved in heart process-related genes often need to determine whether a candidate gene is causally involved in cardiac function or disease. EDITGENE provides custom CRISPR-edited cell models and screening services to accelerate this discovery.
Contact EDITGENE today to design your custom CRISPR model for G protein-coupled receptor signaling pathway involved in heart process research.
Frequently Asked Questions About G protein-coupled receptor signaling pathway involved in heart process
What is GO:0086103?
GO:0086103 is a Gene Ontology term for G protein-coupled receptor signaling pathway involved in heart process, describing GPCR signaling that contributes to heart function.
What genes are involved in G protein-coupled receptor signaling pathway involved in heart process?
Key genes include ADRB1, ADRB2, AGTR1, GRK2, ARRB1, and GNAS [4, 5, 8].
How does GPCR signaling affect heart rate?
GPCRs such as β-adrenergic receptors modulate heart rate by regulating cAMP and calcium levels in cardiomyocytes [4, 8].
What diseases are linked to cardiac GPCR signaling?
Heart failure, arrhythmias, and hypertension are linked to dysregulated cardiac GPCR signaling [4, 5, 8].
What is the role of GRK2 in the heart?
GRK2 desensitizes GPCRs and is upregulated in heart failure, making it a therapeutic target [5, 7].
How can CRISPR be used to study cardiac GPCRs?
CRISPR knockout, point mutation, and knock-in models allow precise genetic manipulation of GPCR genes in cardiomyocytes [4, 5].
What is β-arrestin-1 and how does it affect the heart?
β-arrestin-1 scaffolds GPCR signaling and can be cardioprotective via AMPK phosphorylation at Ser330.
Which receptors are targets of beta-blockers?
β-adrenergic receptors ADRB1 and ADRB2 are targets of beta-blockers used in heart failure [5, 8].
How does angiotensin II signaling affect the heart?
Angiotensin II via AGTR1 promotes vasoconstriction and cardiac hypertrophy, targeted by ARBs.
What models are used to study GO:0086103?
Knockout, point mutation, knock-in, and overexpression models in cardiomyocytes and mice are commonly used [4, 5, 8].
Conclusion
GO:0086103 encompasses the GPCR signaling pathways that are fundamental to cardiac physiology and disease. Understanding these pathways through CRISPR-based models and biochemical assays can reveal new therapeutic targets for heart failure and arrhythmias [4, 5, 8]. EDITGENE offers comprehensive services to support this research.
References
- 1. Russell FA et al.. 2014. Calcitonin gene-related peptide: physiology and pathophysiology.. Physiol Rev 94(4):1099-142 PMID: 25287861
- 2. Gimpl G et al.. 2001. The oxytocin receptor system: structure, function, and regulation.. Physiol Rev 81(2):629-83 PMID: 11274341
- 3. Wu X et al.. 2023. CXCL12/CXCR4: An amazing challenge and opportunity in the fight against fibrosis.. Ageing Res Rev 83:101809 PMID: 36442720
- 4. Zhao M et al.. 2024. AMPK Attenuation of β-Adrenergic Receptor-Induced Cardiac Injury via Phosphorylation of β-Arrestin-1-ser330.. Circ Res 135(6):651-667 PMID: 39082138
- 5. Pfleger J et al.. 2019. G protein-coupled receptor kinases as therapeutic targets in the heart.. Nat Rev Cardiol 16(10):612-622 PMID: 31186538
- 6. Herman TF et al.. 2026. Mu Receptors.. PMID: 31855381
- 7. Packiriswamy N et al.. 2015. G-protein-coupled receptor kinases in inflammation and disease.. Genes Immun 16(6):367-77 PMID: 26226012
- 8. Xu W et al.. 2025. The beta1-adrenergic receptor in the heart.. Cell Death Discov 12(1):46 PMID: 41372115
