GO:1990776 response to angiotensin: Signaling Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:1990776 (response to angiotensin) describes any cellular or organismal change triggered by angiotensin II, III, or IV, including movement, secretion, enzyme production, and gene expression.
• Angiotensin peptides are processed from angiotensinogen and act through the renin-angiotensin system (RAS) to regulate blood pressure, fluid balance, and tissue remodeling.
• The response to angiotensin is highly context-dependent, with tachyphylaxis and specificity observed in renal vascular responses.
• Genetic and pharmacogenetic factors, such as ACE insertion/deletion polymorphisms and APOE-ε4 alleles, modify responses to angiotensin-targeting drugs.
• Dysregulated angiotensin signaling contributes to cardiac fibrosis, kidney injury, and Alzheimer's disease pathology.
• CRISPR-based models (knockout, knock-in, overexpression) enable causal dissection of genes mediating response to angiotensin.
Description
GO:1990776, response to angiotensin, is a biological process defined as any change in state or activity of a cell or organism (movement, secretion, enzyme production, gene expression, etc.) resulting from an angiotensin stimulus. Angiotensin refers to three physiologically active peptides (angiotensin II, III, or IV) processed from angiotensinogen. This term captures the downstream cellular and systemic effects of angiotensin, which are central to the renin-angiotensin system (RAS) and cardiovascular, renal, and neurological physiology. Researchers study this process to understand how angiotensin modulates blood pressure, fluid homeostasis, and tissue remodeling, and to identify therapeutic targets for hypertension, fibrosis, and neurodegeneration. The response is not monolithic; it exhibits specificity and tachyphylaxis, as shown in renal vascular responses to angiotensin II. Moreover, genetic polymorphisms and disease contexts, such as Alport syndrome and Alzheimer's disease, influence the response to angiotensin-targeting drugs. Thus, GO:1990776 provides a framework for integrating molecular, cellular, and organismal data on angiotensin action.
response to angiotensin At A Glance
| GO ID | GO:1990776 |
|---|---|
| GO term | response to angiotensin |
| Ontology | biological_process |
| Synonym | none |
| Definition | Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of an angiotensin stimulus. Angiotensin is any of three physiologically active peptides (angiotensin II, III, or IV) processed from angiotensinogen. |
| Major function | Mediates cellular and systemic responses to angiotensin peptides, including vasoconstriction, aldosterone secretion, fluid retention, and tissue remodeling. |
| Stimulus | Angiotensin II, III, or IV peptides derived from angiotensinogen. |
| Related pathways | Renin-angiotensin system (RAS), G protein-coupled receptor signaling, MAPK signaling, TGF-beta signaling. |
| Disease relevance | Hypertension, cardiac fibrosis, chronic kidney disease, Alport syndrome, Alzheimer's disease. |
What Is GO:1990776?
In our own words, GO:1990776 encompasses all cellular and organismal changes triggered by angiotensin peptides (angiotensin II, III, or IV). These changes include alterations in cell movement, secretion, enzyme production, and gene expression. The term is agnostic to the specific receptor or downstream pathway, focusing instead on the stimulus-response relationship. It is a biological process term, meaning it describes a series of molecular events rather than a single function or component. The definition is based on the QuickGO entry for GO:1990776.
Why Is response to angiotensin Important in Cell Biology?
Understanding response to angiotensin is critical because angiotensin peptides are master regulators of blood pressure, electrolyte balance, and tissue homeostasis, and their dysregulation underlies major cardiovascular, renal, and neurological diseases. The process also modulates drug responses, as genetic variants in RAS components influence the efficacy of angiotensin-targeting therapies. Moreover, angiotensin responses are implicated in acute and chronic adaptations to nephrectomy and saline loading, highlighting their role in renal physiology. Thus, GO:1990776 provides a mechanistic entry point for therapeutic intervention and biomarker discovery.
• Regulates blood pressure and fluid homeostasis via vasoconstriction and aldosterone secretion.
• Drives cardiac fibrosis and remodeling through fibroblast activation and extracellular matrix deposition.
• Modulates renal hemodynamics and tachyphylaxis, affecting kidney function.
• Influences acute and chronic renal responses to injury, such as unilateral nephrectomy.
• Impacts diuretic responses in conditions like solitary functioning kidney.
• Shapes pharmacogenetic responses to angiotensin-targeting drugs in Alport syndrome.
• Interacts with APOE-ε4 and ACE polymorphisms in Alzheimer's disease.
• Mediates dipsogenic (thirst) responses, as shown with estrogen treatment in rats.
• Provides targets for CRISPR-based functional genomics in cardiovascular and renal research.
• Serves as a model for stimulus-specific signaling and desensitization.
What Happens During response to angiotensin?
Angiotensin Generation and Receptor Activation
In simple terms: Angiotensin peptides are cut from a larger protein and then bind to receptors on cells.
Angiotensin II, III, and IV are generated by sequential cleavage of angiotensinogen by renin and angiotensin-converting enzyme (ACE). These peptides bind to G protein-coupled receptors, primarily AT1 and AT2, triggering intracellular signaling cascades. The specificity of the response is evident in renal vascular tachyphylaxis, where repeated exposure to angiotensin II diminishes the response, indicating receptor desensitization or downstream adaptation.
Intracellular Signaling and Gene Expression
In simple terms: Once angiotensin binds, cells turn on signaling pathways that change gene activity.
Activated AT1 receptors couple to Gq/11, leading to phospholipase C activation, calcium mobilization, and protein kinase C signaling. This also transactivates growth factor receptors and stimulates MAPK cascades, resulting in altered gene expression. These changes drive enzyme production, secretion, and cell movement, as defined in GO:1990776.
Physiological Responses: Vasoconstriction and Fluid Balance
In simple terms: Angiotensin makes blood vessels tighten and tells the body to retain salt and water.
Angiotensin II is a potent vasoconstrictor and stimulates aldosterone release, promoting sodium and water retention. These actions are part of the circulating renin-angiotensin system and are critical for responding to hypotension. The dipsogenic response, or thirst, is also triggered by angiotensin, as demonstrated in rats treated with estrogen.
Tissue Remodeling and Fibrosis
In simple terms: Long-term angiotensin exposure can cause scarring and thickening of tissues.
Chronic angiotensin II signaling promotes cardiac fibrosis through activation of fibroblasts, increased TGF-beta, and extracellular matrix deposition. This maladaptive remodeling contributes to heart failure and chronic kidney disease. The response is context-dependent, as seen in unilateral nephrectomy models where angiotensin modulates acute and chronic adaptations.
Modulation by Genetic and Pharmacological Factors
In simple terms: Genes and drugs can change how strongly cells respond to angiotensin.
Polymorphisms in ACE and APOE-ε4 alleles influence responses to angiotensin modulators in Alzheimer's disease. In Alport syndrome, genotype-phenotype correlations affect the response to angiotensin-targeting drugs. Early life ACE inhibition can attenuate diuretic responses in sheep with a solitary kidney, showing developmental programming of angiotensin responses.
Key Genes Involved in GO:1990776 response to angiotensin
The following genes and proteins are central to the response to angiotensin, based on their roles in the renin-angiotensin system and downstream signaling.
| Gene | Major Role | Research Relevance |
|---|---|---|
| AGT | Angiotensinogen precursor | Source of all angiotensin peptides; knockout models reduce angiotensin levels. |
| REN | Renin | Rate-limiting enzyme in angiotensin generation; targets for hypertension research. |
| ACE | Angiotensin-converting enzyme | Converts angiotensin I to II; insertion/deletion polymorphism affects drug responses. |
| ACE2 | Angiotensin-converting enzyme 2 | Generates angiotensin (1-7); counter-regulatory axis. |
| AGTR1 | Angiotensin II receptor type 1 | Mediates vasoconstriction, fibrosis, and aldosterone release. |
| AGTR2 | Angiotensin II receptor type 2 | Opposes AT1 effects; involved in development and repair. |
| APOE | Apolipoprotein E | Modifies angiotensin modulator pharmacogenetics in Alzheimer's disease. |
| COL4A5 | Collagen type IV alpha 5 | Mutations cause Alport syndrome; influences response to angiotensin-targeting drugs. |
| NOS3 | Endothelial nitric oxide synthase | Modulates vascular response to angiotensin. |
| TGFB1 | Transforming growth factor beta 1 | Downstream mediator of angiotensin-induced fibrosis. |
| MAPK1 | Mitogen-activated protein kinase 1 | Transduces angiotensin signaling to gene expression. |
| MAPK3 | Mitogen-activated protein kinase 3 | Transduces angiotensin signaling to gene expression. |
| PRKCA | Protein kinase C alpha | Downstream effector of AT1 receptor. |
| PLCB1 | Phospholipase C beta 1 | Generates IP3 and DAG upon AT1 activation. |
| CYP11B2 | Aldosterone synthase | Mediates aldosterone production in response to angiotensin II. |
| SLC12A3 | Sodium-chloride cotransporter | Regulates salt reabsorption downstream of aldosterone. |
| AQP2 | Aquaporin 2 | Water reabsorption in kidney; modulated by angiotensin. |
| AVP | Arginine vasopressin | Interacts with angiotensin in fluid balance. |
How Is response to angiotensin Regulated?
The response to angiotensin is regulated at multiple levels. Receptor desensitization and tachyphylaxis limit the duration of signaling, as shown in renal vascular responses. Genetic polymorphisms in ACE and APOE modulate the magnitude of response to angiotensin-targeting drugs. Hormonal factors, such as estrogen, can enhance dipsogenic responses to angiotensin. Developmental programming, including early life ACE inhibition, can persistently alter diuretic responses. Additionally, disease states like Alport syndrome and unilateral nephrectomy reprogram angiotensin responsiveness.
response to angiotensin and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| AGTR1 | Cardiac fibrosis, hypertension | Knockout or point-mutation in cardiomyocytes. |
| ACE | Alzheimer's disease, hypertension | Knock-in of insertion/deletion polymorphism in neurons. |
| COL4A5 | Alport syndrome | Patient-derived iPSCs with point mutations. |
| APOE | Alzheimer's disease | Knock-in of ε4 allele in mice. |
| REN | Hypertension, kidney disease | Overexpression in renal cells. |
Cardiac Fibrosis and Heart Failure
Chronic angiotensin II signaling promotes cardiac fibrosis through fibroblast activation and TGF-beta-mediated extracellular matrix deposition, leading to heart failure. Targeting this pathway is a major therapeutic strategy.
Chronic Kidney Disease and Alport Syndrome
Angiotensin contributes to renal injury and proteinuria. In Alport syndrome, genotype-phenotype correlations influence the response to angiotensin-targeting drugs, highlighting the need for personalized therapy. Unilateral nephrectomy models show angiotensin's role in adaptive and maladaptive renal responses.
Alzheimer's Disease
Pharmacogenetic interactions between APOE-ε4 alleles and ACE insertion/deletion polymorphisms affect responses to angiotensin modulators in Alzheimer's disease, suggesting a role for RAS in neurodegeneration.
Hypertension and Fluid Imbalance
Angiotensin II drives vasoconstriction and aldosterone secretion, contributing to hypertension and fluid retention. Dipsogenic responses are also modulated by estrogen, linking angiotensin to thirst regulation.
From response to angiotensin-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does AGTR1 mediate angiotensin-induced fibrosis? | AGTR1 knockout in cardiac fibroblasts. |
| How does ACE polymorphism affect drug response? | ACE knock-in in iPSC-derived neurons. |
| What is the role of COL4A5 in Alport syndrome? | COL4A5 point mutation in kidney organoids. |
| Does early life ACE inhibition alter diuretic response? | Sheep model with solitary kidney and ACE inhibitor treatment. |
| Is APOE-ε4 a modifier of angiotensin response? | APOE-ε4 knock-in mice. |
| How does angiotensin affect thirst? | Estrogen-treated rats with angiotensin infusion. |
How to Study the response to angiotensin Process
| Method | What It Measures | Typical Application |
|---|---|---|
| RNA-seq | Gene expression changes | Identify angiotensin-induced transcriptional programs. |
| Proteomics | Protein abundance and modifications | Map signaling networks downstream of AT1. |
| Phosphoproteomics | Kinase activity and substrate phosphorylation | Discover angiotensin-activated kinases. |
| Calcium imaging | Intracellular calcium flux | Measure acute AT1 receptor activation. |
| CRISPR knockout screen | Gene essentiality for response | Identify novel regulators of angiotensin signaling. |
| CRISPR knock-in | Allele-specific effects | Model ACE polymorphism in isogenic cells. |
| Organoids | Tissue-level responses | Study fibrosis and kidney injury. |
| Animal models | Systemic physiology | Assess blood pressure and diuresis. |
Transcriptomics and RNA-seq
RNA-seq measures global gene expression changes in response to angiotensin, identifying downstream targets and pathways. It is useful for comparing wild-type and knockout models.
Proteomics and Phosphoproteomics
Proteomics quantifies protein abundance and post-translational modifications after angiotensin stimulation, revealing signaling nodes. Phosphoproteomics can map kinase cascades.
Imaging and Live-Cell Assays
Calcium imaging and FRET biosensors visualize real-time signaling events in response to angiotensin. These methods are ideal for studying receptor activation and desensitization.
CRISPR Screening
Genome-wide CRISPR knockout screens identify genes that modulate response to angiotensin, such as receptors, kinases, and transcription factors. This approach is unbiased and scalable.
How CRISPR Can Be Used to Study GO:1990776 response to angiotensin
Knockout
CRISPR knockout of AGTR1, ACE, or REN in cell lines or organoids abolishes specific arms of the response to angiotensin, enabling causal inference. For example, AGTR1 knockout prevents angiotensin-induced fibrosis in cardiac fibroblasts.
Point Mutation
Point mutations can mimic human polymorphisms, such as ACE insertion/deletion or COL4A5 missense variants, to study allele-specific responses to angiotensin. These models are valuable for pharmacogenetics.
Knock-in
Knock-in of APOE-ε4 or mutant COL4A5 into isogenic cell lines or mice allows precise dissection of gene-disease interactions in the context of angiotensin signaling.
Overexpression
Overexpression of AGT or REN increases angiotensin production and amplifies downstream responses, useful for modeling hypertension and fibrosis. Inducible systems provide temporal control.
How EDITGENE Supports response to angiotensin Research
Researchers studying response to angiotensin-related genes often need to determine whether a candidate gene is causally involved in the cellular and physiological changes triggered by angiotensin peptides. This requires precise genetic models that can isolate the contribution of individual genes, alleles, or regulatory elements. EDITGENE provides a comprehensive suite of CRISPR services to generate such models efficiently and reproducibly.
Contact EDITGENE today to design your custom CRISPR model for response to angiotensin research.
Frequently Asked Questions About response to angiotensin
What is GO:1990776 response to angiotensin?
GO:1990776 is a Gene Ontology biological process term describing any cellular or organismal change triggered by angiotensin II, III, or IV, including movement, secretion, enzyme production, and gene expression.
What genes are involved in response to angiotensin?
Key genes include AGT, REN, ACE, ACE2, AGTR1, AGTR2, APOE, COL4A5, and downstream effectors like TGFB1 and MAPK1.
How does angiotensin cause cardiac fibrosis?
Angiotensin II activates fibroblasts and increases TGF-beta signaling, leading to extracellular matrix deposition and fibrosis.
What is the role of ACE polymorphism in Alzheimer's disease?
The ACE insertion/deletion polymorphism, together with APOE-ε4, modifies responses to angiotensin-targeting drugs in Alzheimer's disease.
Can CRISPR be used to study response to angiotensin?
Yes, CRISPR knockout, knock-in, and overexpression models enable causal dissection of genes in the angiotensin pathway.
What is angiotensin tachyphylaxis?
Tachyphylaxis is the diminished response to repeated angiotensin II exposure, as observed in renal vascular responses.
How does estrogen affect angiotensin response?
Estrogen treatment enhances the dipsogenic (thirst) response to angiotensin in rats.
What diseases are linked to response to angiotensin?
Hypertension, cardiac fibrosis, chronic kidney disease, Alport syndrome, and Alzheimer's disease are linked to angiotensin signaling.
What methods study response to angiotensin?
RNA-seq, proteomics, calcium imaging, CRISPR screens, and animal models are commonly used.
What is the renin-angiotensin system?
The RAS is a hormone system that regulates blood pressure and fluid balance, with angiotensin peptides as key effectors.
Conclusion
GO:1990776 response to angiotensin captures a fundamental biological process with broad implications for cardiovascular, renal, and neurological health. Understanding its molecular players and regulatory mechanisms is essential for developing targeted therapies. CRISPR-based models provide powerful tools to dissect causality and identify new drug targets. EDITGENE offers end-to-end services to support such research, from knockout to library screening.
References
- 1. Kong P et al.. 2014. The pathogenesis of cardiac fibrosis.. Cell Mol Life Sci 71(4):549-74 PMID: 23649149
- 2. Almutlaq RN et al.. 2022. Angiotensin in the acute and chronic responses to unilateral nephrectomy.. Am J Physiol Renal Physiol 322(5):F575-F576 PMID: 35343851
- 3. McArdle Z et al.. 2023. Brief early life angiotensin-converting enzyme inhibition attenuates the diuretic response to saline loading in sheep with solitary functioning kidney.. Clin Sci (Lond) 137(16):1285-1296 PMID: 37565514
- 4. Yamamura T et al.. 2020. Genotype-phenotype correlations influence the response to angiotensin-targeting drugs in Japanese patients with male X-linked Alport syndrome.. Kidney Int 98(6):1605-1614 PMID: 32712167
- 5. de Leeuw PW et al.. 1982. Renal vascular tachyphylaxis to angiotensin II: specificity of the response for angiotensin.. Life Sci 30(10):813-9 PMID: 7070197
- 6. Oliveira FF et al.. 2023. Pharmacogenetics of angiotensin modulators according to APOE-ϵ4 alleles and the ACE insertion/deletion polymorphism in Alzheimer's disease.. Acta Neuropsychiatr 35(6):346-361 PMID: 37605989
- 7. Waller DG. 1993. The circulating renin-angiotensin system and the response to hypotension.. Clin Exp Allergy 23(9):718-21 PMID: 10779301
- 8. Fregly MJ. 1980. Effect of chronic treatment with estrogen on the dipsogenic response of rats to angiotensin.. Pharmacol Biochem Behav 12(1):131-6 PMID: 7367456
