GO:0060455 negative regulation of gastric acid secretion: Physiology, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0060455 describes any biological process that decreases the rate, frequency, or extent of gastric acid secretion by parietal (oxyntic) cells during digestion.
• Gastric acid secretion is driven by the parietal cell proton pump (H+/K+-ATPase), and its negative regulation is essential to prevent mucosal injury and maintain gut homeostasis.
• Genetically engineered mouse models have been instrumental in identifying the molecular players that inhibit acid secretion, including gastrin, somatostatin, and cholecystokinin receptors.
• Post-translational modifications such as desialylation can directly inhibit the gastric proton pump, revealing a new layer of negative regulation.
• Dysregulation of negative regulation contributes to functional dyspepsia, gastric cancer, and other gastrointestinal disorders [7,5].
• CRISPR-based knockout, knock-in, and overexpression models are powerful tools to dissect the causal roles of genes in this process.
Description
Gastric acid secretion is a tightly controlled process that facilitates digestion and protects against ingested pathogens, but excessive acid can damage the stomach lining and lead to peptic ulcers and reflux disease. The Gene Ontology term GO:0060455, negative regulation of gastric acid secretion, encompasses all molecular and cellular events that decrease the rate, frequency, or extent of hydrochloric acid release by parietal cells. Understanding this process is critical because it represents a key homeostatic mechanism that balances digestive needs with mucosal protection. Genetic studies in mice have revealed that disruption of negative regulators can cause hypergastrinemia, acid hypersecretion, and gastric pathology. Moreover, recent work has shown that post-translational modifications, such as desialylation of the proton pump, can directly inhibit acid secretion, highlighting the diversity of regulatory mechanisms. This article synthesizes current knowledge on the genes, mechanisms, and research methods used to study negative regulation of gastric acid secretion, with a focus on how CRISPR-based models can accelerate discovery.
negative regulation of gastric acid secretion At A Glance
| GO ID | GO:0060455 |
|---|---|
| GO term | negative regulation of gastric acid secretion |
| Ontology | biological_process |
| Synonym | none |
| Major function | Decreases the rate, frequency, or extent of gastric acid secretion by parietal cells |
| Definition source | QuickGO |
| Related process | Regulation of gastric acid secretion (GO:0060454) |
| Key cell type | Parietal (oxyntic) cell |
| Key effector | Gastric H+/K+-ATPase (proton pump) |
What Is GO:0060455?
GO:0060455 is defined as any process that decreases the rate, frequency, or extent of gastric secretion, which is the regulated release of gastric acid (hydrochloric acid) by parietal or oxyntic cells during digestion. In practice, this term covers signaling pathways, transcriptional programs, and post-translational events that inhibit the proton pump or upstream stimulatory pathways, thereby reducing acid output.
Why Is negative regulation of gastric acid secretion Important in Cell Biology?
Negative regulation of gastric acid secretion is essential for preventing acid-related tissue damage and maintaining gastrointestinal homeostasis. Dysregulation of this process is implicated in functional dyspepsia, peptic ulcer disease, and gastric cancer, making it a target for therapeutic intervention [7,5]. Understanding the genetic and molecular basis of this regulation can inform the development of drugs that modulate acid secretion, such as proton pump inhibitors, and guide research into novel treatments for acid-related disorders.
• Prevents excessive acid exposure that can lead to peptic ulcers and gastritis.
• Maintains the balance between digestive needs and mucosal protection.
• Dysregulation is associated with functional dyspepsia and other gastrointestinal disorders.
• Altered negative regulation may contribute to gastric cancer progression.
• Provides targets for pharmacological inhibition of acid secretion, such as proton pump inhibitors.
• Post-translational modifications like desialylation offer new avenues for therapeutic modulation.
• Genetic mouse models have elucidated key inhibitory pathways, including somatostatin and CCK2 receptor signaling.
• Understanding this process aids in the development of personalized treatments for acid-related diseases.
What Happens During negative regulation of gastric acid secretion?
Inhibition of Parietal Cell Stimulation
In simple terms: This step blocks the signals that tell parietal cells to make acid.
Negative regulation of gastric acid secretion often begins with the inhibition of stimulatory pathways. For example, somatostatin released from D cells in the stomach inhibits gastrin release from G cells and directly acts on parietal cells to reduce acid production. Additionally, cholecystokinin (CCK) can inhibit acid secretion via CCK2 receptors under certain conditions, as shown in genetically engineered mouse models. These inhibitory signals counteract the stimulatory effects of histamine, gastrin, and acetylcholine, thereby decreasing acid output.
Post-translational Modification of the Proton Pump
In simple terms: Chemical changes to the acid pump can turn it off.
The gastric H+/K+-ATPase is the final effector of acid secretion. Recent studies using fluorescent imaging with a sialic acid-specific nanoprobe have suggested that desialylation of the proton pump negatively regulates its activity. This post-translational modification may alter the pump's conformation or trafficking, leading to reduced acid secretion. This represents a direct molecular mechanism for negative regulation independent of classical signaling pathways.
Transcriptional and Epigenetic Control
In simple terms: Cells can dial down the production of acid-making machinery.
Long-term negative regulation can occur through changes in gene expression. For instance, inflammatory cytokines such as interleukin-1 beta (IL-1β) can suppress the expression of genes encoding the proton pump subunits and other acid-secretion machinery. Although specific transcription factors are not fully defined in the context of GO:0060455, studies in genetically engineered mice have shown that disruption of certain genes leads to altered acid secretion, indicating transcriptional control.
Neural and Hormonal Feedback Loops
In simple terms: The brain and gut hormones work together to put the brakes on acid.
The vagus nerve and enteric nervous system provide inhibitory inputs to parietal cells. For example, activation of somatostatin-secreting D cells by acid in the stomach lumen creates a negative feedback loop that reduces further acid secretion. Additionally, hormones such as secretin and peptide YY can inhibit acid secretion. These feedback mechanisms ensure that acid production is tightly matched to digestive demands.
Key Genes Involved in GO:0060455 negative regulation of gastric acid secretion
The following genes and proteins are key players in the negative regulation of gastric acid secretion, as identified through genetic and pharmacological studies.
| Gene | Major Role | Research Relevance |
|---|---|---|
| SST | Encodes somatostatin, a major inhibitor of acid secretion | Somatostatin analogs are used to treat acid hypersecretion; KO models show hyperacidity |
| GAST | Encodes gastrin, which stimulates acid but also triggers negative feedback via somatostatin | Gastrin KO mice exhibit altered acid regulation |
| CCKBR | Encodes CCK2 receptor, mediates both stimulatory and inhibitory effects on acid secretion | CCK2 receptor KO mice show dysregulated acid secretion |
| HRH2 | Encodes histamine H2 receptor, primarily stimulatory but involved in feedback | H2 receptor antagonists are used to suppress acid; KO models help dissect feedback |
| ATP4A | Encodes the alpha subunit of H+/K+-ATPase, the proton pump | Target of proton pump inhibitors; desialylation inhibits pump activity |
| ATP4B | Encodes the beta subunit of H+/K+-ATPase | Essential for pump function; mutations affect acid secretion |
| SLC26A9 | Chloride transporter involved in acid secretion | May be regulated to inhibit acid output |
| KCNQ1 | Potassium channel required for acid secretion | Inhibition reduces acid secretion; KO models available |
| CFTR | Chloride channel that supports acid secretion | Modulation can affect acid secretion |
| SLC4A2 | Anion exchanger in parietal cells | Potential target for negative regulation |
| GIF | Gastric intrinsic factor, not directly acid but co-regulated | Marker of parietal cell function |
| MCOLN1 | TRPML1 channel, involved in autophagy and zinc influx | May influence gastric cancer and acid secretion indirectly |
| HTR2B | Serotonin receptor that regulates lipid metabolism | Linked to gastric cancer and potentially acid secretion |
| TMEM160 | Inhibits KEAP1, suppresses ferroptosis | Implicated in gastric cancer chemoresistance |
| FXR | Nuclear receptor involved in bile acid signaling | Gastric bypass changes microbiota and FXR signaling, affecting acid |
| TGR5 | G protein-coupled bile acid receptor | Mediates systemic effects of gastric bypass |
| PGA5 | Encodes pepsinogen A5, a gastric protease | Co-regulated with acid secretion |
| SLC12A2 | NKCC1 cotransporter, supports acid secretion | Inhibition may reduce acid output |
How Is negative regulation of gastric acid secretion Regulated?
Negative regulation of gastric acid secretion is controlled by a complex interplay of neural, hormonal, and paracrine signals. Somatostatin, released from D cells in response to acid, inhibits gastrin release and directly suppresses parietal cell activity. Additionally, inflammatory cytokines such as IL-1β can downregulate acid secretion, and post-translational modifications like desialylation can directly inhibit the proton pump. These regulatory layers ensure that acid secretion is finely tuned to physiological needs.
negative regulation of gastric acid secretion and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| SST | Acid hypersecretion, peptic ulcer | SST knockout mouse; overexpression in parietal cells |
| GAST | Zollinger-Ellison syndrome | Gastrin knockout or knock-in mouse |
| CCKBR | Functional dyspepsia, acid dysregulation | CCKBR knockout mouse; point mutation models |
| HTR2B | Gastric cancer, ferroptosis | HTR2B knockout gastric cancer cell lines; overexpression models |
| TMEM160 | Gastric cancer chemoresistance | TMEM160 knockout and knock-in cell models |
Functional Dyspepsia
Functional dyspepsia is a common disorder characterized by upper abdominal discomfort without organic cause. Dysregulation of gastric acid secretion, including impaired negative regulation, is thought to contribute to symptoms. A network pharmacology study on erpixing granules for functional dyspepsia revealed mechanisms involving acid secretion pathways, highlighting the relevance of GO:0060455.
Gastric Cancer
Chronic acid hypersecretion and Helicobacter pylori infection are risk factors for gastric cancer. Negative regulators of acid secretion may influence cancer development. For instance, HTR2B, a serotonin receptor, regulates lipid metabolism and ferroptosis in gastric cancer, and its modulation could affect acid secretion. Additionally, TMEM160 inhibits KEAP1 to suppress ferroptosis and induce chemoresistance in gastric cancer, suggesting a link between acid regulation and cancer therapy response.
Obesity and Metabolic Surgery
Gastric bypass surgery alters gut microbiota and bile acid signaling, leading to changes in acid secretion and systemic metabolism. Münzker et al. showed that functional changes in the gastric bypass microbiota reactivate thermogenic adipose tissue via intestinal FXR-TGR5 crosstalk, which may involve altered negative regulation of acid secretion.
From negative regulation of gastric acid secretion-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X inhibit acid secretion? | Knockout mouse or cell line; measure acid output |
| Does a point mutation in ATP4A affect pump inhibition? | Point mutation knock-in in gastric cell lines |
| Can overexpression of SST reduce acid secretion? | Overexpression cell model or transgenic mouse |
| How does desialylation regulate the proton pump? | Tagged knock-in of ATP4A with sialylation sites; imaging |
| What is the role of CCKBR in negative feedback? | CCKBR knockout and knock-in models |
| Does HTR2B modulate acid secretion in cancer? | HTR2B knockout and overexpression in gastric cancer cells |
How to Study the negative regulation of gastric acid secretion Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Gastric cannulation | Acid output in vivo | Assessing effects of drugs or gene knockouts |
| pH-sensitive dyes | Intracellular pH changes | In vitro parietal cell acid secretion |
| Knockout mouse models | Gene function in acid regulation | Identifying negative regulators |
| Fluorescent nanoprobe imaging | Sialylation status of proton pump | Detecting desialylation-mediated inhibition |
| Network pharmacology | Pathway enrichment | Predicting mechanisms of herbal compounds |
| RNA-seq | Transcriptional changes | Identifying genes altered by negative regulators |
| Proteomics | Protein expression and modifications | Detecting post-translational changes in pump subunits |
Measuring Gastric Acid Secretion
Acid secretion can be measured in vivo using gastric cannulation or in vitro using isolated parietal cells and pH-sensitive dyes. These methods allow direct assessment of negative regulation.
Genetically Engineered Mouse Models
Knockout and transgenic mice have been invaluable for identifying genes that negatively regulate acid secretion. For example, somatostatin and CCK2 receptor knockout mice exhibit altered acid output.
Fluorescent Imaging of Post-translational Modifications
Advanced imaging techniques, such as sialic acid-specific nanoprobes, can visualize desialylation of the proton pump in live cells, providing insights into direct inhibitory mechanisms.
Network Pharmacology and Bioinformatics
Computational approaches can predict pathways involved in negative regulation. A study on erpixing granules used network pharmacology to identify acid secretion pathways relevant to functional dyspepsia.
How CRISPR Can Be Used to Study GO:0060455 negative regulation of gastric acid secretion
Knockout
CRISPR knockout of candidate genes such as SST, GAST, or CCKBR in cell lines or mice can reveal their role in negative regulation of acid secretion. For example, SST knockout mice exhibit increased acid secretion, confirming its inhibitory role.
Point Mutation
Introducing point mutations in genes like ATP4A can mimic human variants that affect pump function. This helps dissect the precise molecular mechanisms of negative regulation, such as desialylation sites.
Knock-in
Knock-in of tagged versions of the proton pump or regulatory proteins allows real-time imaging and tracking of their localization and modifications. This is useful for studying dynamic regulation.
Overexpression
Overexpression of negative regulators like somatostatin or TMEM160 in gastric cell lines can suppress acid secretion and provide a gain-of-function model to study downstream effects.
How EDITGENE Supports negative regulation of gastric acid secretion Research
Researchers studying negative regulation of gastric acid secretion-related genes often need to determine whether a candidate gene is causally involved in inhibiting acid output or is merely a bystander. CRISPR-based genome editing provides the gold-standard approach to establish causality by creating precise knockout, knock-in, point mutation, and overexpression models in relevant cell types and animal models.
Contact EDITGENE today to design your custom CRISPR model for negative regulation of gastric acid secretion research.
Frequently Asked Questions About negative regulation of gastric acid secretion
What is GO:0060455?
GO:0060455 is the Gene Ontology term for negative regulation of gastric acid secretion, describing any process that decreases the rate, frequency, or extent of acid release by parietal cells.
What genes are involved in negative regulation of gastric acid secretion?
Key genes include SST (somatostatin), GAST (gastrin), CCKBR (CCK2 receptor), and ATP4A/ATP4B (proton pump subunits) [4,1].
How is gastric acid secretion negatively regulated?
It is regulated by hormonal feedback (e.g., somatostatin), neural inputs, post-translational modifications like desialylation, and transcriptional changes [4,1].
What diseases are associated with impaired negative regulation of gastric acid secretion?
Functional dyspepsia, peptic ulcers, and gastric cancer have been linked to dysregulated acid secretion [7,5].
What research models are used to study negative regulation of gastric acid secretion?
Genetically engineered mice, CRISPR knockout cell lines, and fluorescent imaging with nanoprobes are commonly used [4,1].
Can CRISPR be used to study negative regulation of gastric acid secretion?
Yes, CRISPR knockout, knock-in, point mutation, and overexpression models allow precise dissection of gene function in this process.
What is the role of somatostatin in gastric acid secretion?
Somatostatin inhibits gastrin release and directly suppresses parietal cell acid production, acting as a key negative regulator.
How does desialylation affect the gastric proton pump?
Desialylation of the H+/K+-ATPase has been suggested to inhibit its activity, providing a direct mechanism for negative regulation.
What methods measure gastric acid secretion?
Gastric cannulation, pH-sensitive dyes, and in vitro parietal cell assays are used to quantify acid output.
Why is negative regulation of gastric acid secretion important for health?
It prevents excessive acid that can damage the stomach lining and cause ulcers, while maintaining digestive function.
Conclusion
Negative regulation of gastric acid secretion (GO:0060455) is a vital biological process that protects the stomach from acid-induced injury and maintains digestive homeostasis. Through a combination of hormonal, neural, and post-translational mechanisms, parietal cells fine-tune acid output. Dysregulation of this process contributes to common gastrointestinal diseases, making it a key area of research. CRISPR-based models offer powerful tools to dissect the genetic basis of this regulation and to identify new therapeutic targets.
References
- 1. Fujii T et al.. 2019. [Negative regulation of gastric proton pump by desialylation suggested by fluorescent imaging with the sialic acid-specific nanoprobe].. Nihon Yakurigaku Zasshi 153(6):261-266 PMID: 31178530
- 3. Qi J et al.. 2021. MCOLN1/TRPML1 finely controls oncogenic autophagy in cancer by mediating zinc influx.. Autophagy 17(12):4401-4422 PMID: 33890549
- 4. Samuelson LC et al.. 2003. Insights into the regulation of gastric acid secretion through analysis of genetically engineered mice.. Annu Rev Physiol 65:383-400 PMID: 12517996
- 5. Tu RH et al.. 2023. Neurotransmitter Receptor HTR2B Regulates Lipid Metabolism to Inhibit Ferroptosis in Gastric Cancer.. Cancer Res 83(23):3868-3885 PMID: 38037454
- 6. Münzker J et al.. 2022. Functional changes of the gastric bypass microbiota reactivate thermogenic adipose tissue and systemic glucose control via intestinal FXR-TGR5 crosstalk in diet-induced obesity.. Microbiome 10(1):96 PMID: 35739571
- 7. Bai Y et al.. 2024. Network pharmacology combined with experimental validation reveals the mechanism of action of erpixing granules on functional dyspepsia.. J Ethnopharmacol 334:118553 PMID: 38992401
- 8. Huang C et al.. 2025. TMEM160 inhibits KEAP1 to suppress ferroptosis and induce chemoresistance in gastric cancer.. Cell Death Dis 16(1):287 PMID: 40223081
