GO:1904385 cellular response to angiotensin: Signaling Mechanism, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:1904385 (cellular response to angiotensin) describes any change in a cell's state or activity caused by angiotensin peptides (angiotensin II, III, or IV) derived from angiotensinogen.
• Angiotensin II is the principal effector of the renin-angiotensin-aldosterone system (RAAS) and drives fibrosis, hypertrophy, and inflammation in cardiovascular and renal tissues.
• The response is cell-type specific: left and right ventricular endocardial endothelial cells respond differently to angiotensin II, illustrating chamber-specific signaling.
• Angiotensin also acts as a central dipsogen and participates in body-fluid homeostasis and blood-pressure regulation.
• RAAS blockade (ACE inhibitors, ARBs) is a validated therapeutic strategy for fibrosis and hypertension, underscoring the clinical relevance of this GO term.
• CRISPR knockout, knock-in, and overexpression models enable causal dissection of angiotensin-responsive genes in cardiovascular and renal disease.
Description
GO:1904385, cellular response to angiotensin, is a Gene Ontology biological process term that captures any change in a cell's state or activity (movement, secretion, enzyme production, gene expression, etc.) resulting from an angiotensin stimulus. Angiotensin is any of three physiologically active peptides (angiotensin II, III, or IV) processed from angiotensinogen. This term is essential for annotating how cells interpret and transduce angiotensin signals in cardiovascular, renal, and central nervous system contexts.
cellular response to angiotensin At A Glance
| GO ID | GO:1904385 |
|---|---|
| GO term | cellular response to angiotensin |
| Ontology | biological_process |
| Synonym | none |
| Definition | Any process that results in a change in state or activity of a cell 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 | Transduction of angiotensin signals into cellular responses such as fibrosis, hypertrophy, secretion, and gene expression changes. |
| Stimulus | Angiotensin II, III, or IV peptides derived from angiotensinogen. |
| Related system | Renin-angiotensin-aldosterone system (RAAS). |
| Disease relevance | Cardiac fibrosis, hypertension, renal fibrosis, and other RAAS-associated pathologies. |
What Is GO:1904385?
In practical terms, GO:1904385 refers to the collection of intracellular events triggered when a cell encounters angiotensin peptides. These events include changes in gene expression, secretion, contraction, proliferation, and extracellular matrix production. The term is defined by the stimulus (angiotensin) and the cellular response, not by a single receptor or pathway, making it a useful umbrella for annotating diverse angiotensin-driven processes such as fibrosis, hypertrophy, and fluid homeostasis.
Why Is cellular response to angiotensin Important in Cell Biology?
Understanding cellular response to angiotensin is critical because dysregulated RAAS signaling underlies some of the most prevalent human diseases, including hypertension, cardiac fibrosis, and chronic kidney disease. The term provides a standardized framework for annotating genes and pathways that mediate these effects, enabling researchers to compare data across species and experimental systems.
• Angiotensin II is a central mediator of cardiac fibrosis and hypertrophy.
• RAAS targeting is a proven therapeutic strategy in fibrosis and hypertension.
• Angiotensin acts on the hypothalamus to regulate thirst and blood pressure.
• Endocardial endothelial cells show chamber-specific responses to angiotensin II.
• Angiotensin is an evolutionary conserved dipsogen across vertebrates.
• The term helps annotate gene expression changes in cardiovascular and renal cells.
• It links molecular signaling to organ-level pathophysiology in heart and kidney.
• CRISPR models of angiotensin-responsive genes can reveal causal mechanisms.
What Happens During cellular response to angiotensin?
Angiotensin generation and receptor engagement
In simple terms: The body makes angiotensin peptides, and cells respond when these peptides bind to their surface receptors.
Angiotensin II, III, and IV are generated from angiotensinogen through sequential cleavage by renin and angiotensin-converting enzyme (ACE). Once formed, angiotensin II binds to AT1 and AT2 receptors on target cells, initiating intracellular signaling cascades. This step is the entry point for GO:1904385.
Intracellular signaling and second messengers
In simple terms: Once angiotensin binds, the cell switches on internal signals that change its behavior.
AT1 receptor activation triggers Gq/11-mediated phospholipase C signaling, calcium mobilization, and protein kinase C activation, as well as reactive oxygen species generation and MAPK cascades. These events alter gene expression and enzyme activity, consistent with the GO definition of a change in cell state or activity.
Transcriptional and secretory responses
In simple terms: The cell changes which genes it turns on and what it releases.
Angiotensin II induces expression of profibrotic genes such as TGF-beta, collagen, and fibronectin, and promotes secretion of cytokines and growth factors. These transcriptional and secretory changes are hallmarks of the cellular response to angiotensin and are observed in cardiac and renal cells.
Cell-type specific outcomes
In simple terms: Different cells respond to angiotensin in different ways.
Left and right ventricular endocardial endothelial cells exhibit distinct responses to angiotensin II, indicating that the cellular response is context-dependent. Similarly, hypothalamic neurons respond to angiotensin as a dipsogenic stimulus, linking the term to fluid homeostasis.
Key Genes Involved in GO:1904385 cellular response to angiotensin
The following genes and proteins are central to the cellular response to angiotensin, based on published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| AGT | Angiotensinogen precursor | Source of all angiotensin peptides; target for KO and knock-in studies |
| REN | Renin | Rate-limiting enzyme in angiotensin generation; RAAS target |
| ACE | Angiotensin-converting enzyme | Generates angiotensin II; drug target (ACE inhibitors) |
| AGTR1 | Angiotensin II receptor type 1 | Mediates profibrotic and hypertrophic signaling |
| AGTR2 | Angiotensin II receptor type 2 | Counter-regulatory effects in some tissues |
| TGFB1 | Transforming growth factor beta 1 | Downstream mediator of angiotensin-induced fibrosis |
| COL1A1 | Collagen type I alpha 1 | Extracellular matrix component in fibrosis |
| FN1 | Fibronectin 1 | Matrix protein upregulated by angiotensin |
| MAPK1 | Mitogen-activated protein kinase 1 | Signaling intermediate in angiotensin response |
| MAPK3 | Mitogen-activated protein kinase 3 | Signaling intermediate in angiotensin response |
| NFKB1 | Nuclear factor kappa B subunit 1 | Inflammatory signaling downstream of angiotensin |
| NPPA | Natriuretic peptide A | Cardiac hypertrophy marker |
| NPPB | Natriuretic peptide B | Cardiac hypertrophy marker |
| MYH7 | Myosin heavy chain 7 | Hypertrophy-associated gene |
| ACTA1 | Actin alpha 1 | Cytoskeletal remodeling in hypertrophy |
| EDN1 | Endothelin 1 | Vasoactive peptide induced by angiotensin |
| SLC9A1 | Sodium/hydrogen exchanger 1 | Ion transport regulated by angiotensin |
How Is cellular response to angiotensin Regulated?
The cellular response to angiotensin is regulated at multiple levels. RAAS activity is controlled by renin release, ACE availability, and receptor density. Negative feedback involves AT2 receptor signaling and degradation of angiotensin peptides. In the brain, angiotensin II acts on hypothalamic circuits to regulate thirst and blood pressure, integrating neural and hormonal inputs. Additionally, angiotensin II can modulate its own effects through induction of TGF-beta and other growth factors, creating feed-forward loops in fibrosis.
cellular response to angiotensin and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| AGTR1 | Cardiac fibrosis and hypertrophy | Cardiomyocyte-specific KO or overexpression |
| AGT | Hypertension | Liver-specific KO or knock-in of human variants |
| ACE | Renal fibrosis and hypertension | ACE knockout or point mutation |
| TGFB1 | Organ fibrosis | Fibroblast-specific KO or overexpression |
| NPPA | Cardiac hypertrophy | Reporter knock-in for hypertrophy screening |
Cardiac fibrosis and hypertrophy
Angiotensin II is a major driver of cardiac fibrosis and pathological hypertrophy. It promotes fibroblast proliferation, collagen deposition, and cardiomyocyte enlargement through AT1 receptor signaling and downstream TGF-beta activation. Experimental models of angiotensin-induced hypertension show cardiac hypertrophy and altered gene expression, which can be attenuated by interventions such as emodin.
Hypertension and renal disease
The RAAS is central to blood pressure regulation, and excessive angiotensin II signaling contributes to hypertension and renal fibrosis. Targeting the RAAS with ACE inhibitors or angiotensin receptor blockers is a validated therapeutic approach for fibrosis and hypertension. The hypothalamus also integrates angiotensin signals to modulate sympathetic outflow and fluid intake, linking central responses to systemic blood pressure.
Fibrosis across organs
Angiotensin II promotes fibrosis in multiple organs, including heart, kidney, and lung. The cellular response involves activation of profibrotic gene programs, including TGF-beta, collagen, and fibronectin, which are shared across tissues. This makes GO:1904385 relevant to a broad spectrum of fibrotic diseases.
From cellular response to angiotensin-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does AGTR1 mediate angiotensin-induced hypertrophy? | Cardiomyocyte-specific AGTR1 knockout |
| What is the role of ACE in renal fibrosis? | ACE knockout or point mutation in mice |
| How does angiotensin II affect gene expression? | RNA-seq after angiotensin II treatment in wild-type and KO cells |
| Can a disease-associated AGT variant alter secretion? | Knock-in of the variant in hepatocyte-like cells |
| Which genes are essential for angiotensin response? | Genome-wide CRISPR library screening |
| Does angiotensin regulate thirst neurons? | Hypothalamic neuron-specific KO or chemogenetic models |
How to Study the cellular response to angiotensin Process
| Method | What It Measures | Typical Application |
|---|---|---|
| RNA-seq | Global gene expression changes | Identify angiotensin-responsive genes |
| Proteomics | Protein abundance and modifications | Discover signaling mediators |
| CRISPR knockout | Loss-of-function effects | Test causal role of candidate genes |
| Reporter assays | Transcriptional activity | Monitor NPPA/NPPB promoters |
| Histology | Fibrosis and hypertrophy | Assess collagen and cell size |
| Telemetry | Blood pressure | Evaluate RAAS modulation in vivo |
| Thirst tests | Water intake | Study central angiotensin effects |
Transcriptomic profiling
RNA-seq is widely used to measure changes in gene expression following angiotensin II stimulation. This approach can identify profibrotic and hypertrophic gene signatures and is applicable to wild-type and CRISPR-modified cells.
Proteomic and secretome analysis
Mass spectrometry-based proteomics can quantify changes in protein abundance and secretion in response to angiotensin. This is useful for identifying novel mediators of the cellular response.
Functional assays for fibrosis and hypertrophy
Collagen deposition, fibroblast proliferation, and cardiomyocyte size are standard readouts. These assays can be combined with CRISPR knockout to test causality.
In vivo hemodynamic and behavioral studies
Blood pressure telemetry and thirst tests in animal models provide physiological context for cellular responses to angiotensin.
How CRISPR Can Be Used to Study GO:1904385 cellular response to angiotensin
Knockout
CRISPR knockout of angiotensin receptors (AGTR1, AGTR2) or downstream signaling genes can abolish or attenuate the cellular response to angiotensin, providing causal evidence for their involvement.
Point Mutation
Introducing point mutations in AGT, REN, or ACE can mimic human variants associated with hypertension or fibrosis, allowing functional assessment of disease-associated alleles.
Knock-in
Knock-in of reporter genes (e.g., luciferase) under the control of angiotensin-responsive promoters enables real-time monitoring of transcriptional responses in live cells.
Overexpression
Overexpression of AGTR1 or TGFB1 can amplify angiotensin signaling and exacerbate fibrotic phenotypes, useful for gain-of-function studies.
How EDITGENE Supports cellular response to angiotensin Research
Researchers studying cellular response to angiotensin-related genes often need to determine whether a candidate gene is causally involved in disease-relevant phenotypes. EDITGENE provides a comprehensive suite of CRISPR services to enable such studies with high precision and reproducibility.
Contact EDITGENE today to design your custom CRISPR model for cellular response to angiotensin research.
Frequently Asked Questions About cellular response to angiotensin
What is GO:1904385 cellular response to angiotensin?
GO:1904385 is a Gene Ontology biological process term describing any change in a cell's state or activity caused by angiotensin peptides (angiotensin II, III, or IV).
What genes are involved in cellular response to angiotensin?
Key genes include AGT, REN, ACE, AGTR1, AGTR2, TGFB1, and downstream effectors such as COL1A1 and FN1.
How does angiotensin II cause cardiac fibrosis?
Angiotensin II activates AT1 receptors, triggering TGF-beta signaling, fibroblast proliferation, and collagen deposition, leading to fibrosis.
What is the role of the renin-angiotensin-aldosterone system in hypertension?
The RAAS regulates blood pressure and fluid balance; excessive angiotensin II signaling contributes to hypertension and is targeted by ACE inhibitors and ARBs.
Can CRISPR be used to study angiotensin signaling?
Yes, CRISPR knockout, knock-in, and overexpression models are powerful tools to dissect the causal roles of angiotensin-related genes.
What cell types respond to angiotensin?
Many cell types respond, including cardiomyocytes, fibroblasts, endothelial cells, and hypothalamic neurons.
How is angiotensin II produced?
Angiotensin II is generated from angiotensinogen by renin and angiotensin-converting enzyme (ACE).
What are the symptoms of excess angiotensin II?
Excess angiotensin II can lead to hypertension, cardiac hypertrophy, fibrosis, and increased thirst.
What is the difference between angiotensin II, III, and IV?
They are distinct peptides processed from angiotensinogen with different receptor affinities and functions, all covered by GO:1904385.
How do I choose a model to study cellular response to angiotensin?
Consider the cell type and phenotype of interest; knockout models for loss-of-function, knock-in for reporters, and overexpression for gain-of-function studies.
Conclusion
GO:1904385 cellular response to angiotensin is a fundamental biological process that links angiotensin peptides to diverse cellular outcomes, including fibrosis, hypertrophy, and fluid homeostasis. Its dysregulation is central to cardiovascular and renal diseases, making it a key target for research and therapeutic intervention. Leveraging CRISPR technologies and multi-omics approaches will continue to unravel the complexities of this response and identify new treatment strategies.
References
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- 3. Evans L et al.. 2023. Emodin Inhibited Pathological Cardiac Hypertrophy in Response to Angiotensin-Induced Hypertension and Altered the Gut Microbiome.. Biomolecules 13(9) PMID: 37759673
- 4. AlQudah M et al.. 2020. Targeting the renin-angiotensin-aldosterone system in fibrosis.. Matrix Biol 91-92:92-108 PMID: 32422329
- 5. Fitzsimons JT et al.. 1977. Cellular and extracellular dehydration, and angiotensin as stimuli to drinking in the common iguana Iguana iguana.. J Physiol 265(2):443-63 PMID: 850202
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