GO:0061178 regulation of insulin secretion involved in cellular response to glucose stimulus: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0061178 describes the biological process that modulates the frequency, rate, or extent of insulin release specifically in response to glucose stimulation.
• Glucose metabolism in pancreatic beta cells generates ATP and other signals that trigger insulin granule exocytosis through both triggering and amplifying pathways.
• Key genes include INS, GCK, SLC2A2, KCNJ11, ABCC8, CACNA1C, and SNARE proteins such as STX1A and VAMP2.
• The process is biphasic, with a rapid first phase and a sustained second phase that depend on distinct pools of insulin granules and cytoskeletal dynamics.
• Dysregulation of this process is central to type 2 diabetes, monogenic diabetes, and congenital hyperinsulinism.
• CRISPR-based models (knockout, point mutation, knock-in, overexpression) enable causal dissection of genes regulating insulin secretion.
Description
Regulation of insulin secretion involved in cellular response to glucose stimulus (GO:0061178) is a biological process that modulates the regulated release of insulin in response to glucose. This process is essential for maintaining blood glucose homeostasis and is primarily executed by pancreatic beta cells. Researchers study this term to understand how glucose sensing, metabolism, and exocytosis are coordinated and how their failure leads to diabetes. The process integrates nutrient signals, electrical activity, calcium influx, and vesicle trafficking to achieve precise control of insulin release. Because insulin secretion is a hallmark of beta cell function, GO:0061178 is a focal point for diabetes research, drug discovery, and regenerative medicine.
regulation of insulin secretion involved in cellular response to glucose stimulus At A Glance
| GO ID | GO:0061178 |
|---|---|
| GO term | regulation of insulin secretion involved in cellular response to glucose stimulus |
| Ontology | biological_process |
| Synonym | regulation of insulin secretion in response to glucose |
| Major function | Modulates the frequency, rate, or extent of insulin release in response to glucose |
| Related processes | Glucose sensing, ATP production, calcium signaling, vesicle exocytosis |
| Cellular location | Pancreatic beta cells |
| Disease relevance | Type 2 diabetes, monogenic diabetes, congenital hyperinsulinism |
What Is GO:0061178?
GO:0061178 encompasses any process that modulates the frequency, rate, or extent of the regulated release of insulin that contributes to the response of a cell to glucose. It includes signaling events, metabolic changes, and exocytotic steps that adjust insulin secretion according to glucose levels. This term is a child of regulation of insulin secretion and is specific to the context of cellular glucose stimulus.
Why Is regulation of insulin secretion involved in cellular response to glucose stimulus Important in Cell Biology?
GO:0061178 is critical because insulin secretion is the primary mechanism for lowering blood glucose after a meal, and its dysregulation is a defining feature of diabetes. Understanding this process at the molecular level informs the development of therapies that preserve or restore beta cell function. Moreover, genes involved in this process are frequent targets of genetic variants associated with diabetes risk, making it a key area for functional genomics.
• Maintains glucose homeostasis by matching insulin release to metabolic demand.
• Dysfunction leads to hyperglycemia and diabetes mellitus.
• Mutations in genes like GCK, KCNJ11, and ABCC8 cause monogenic diabetes or hyperinsulinism.
• Biphasic secretion defects are an early sign of beta cell failure in type 2 diabetes.
• Target for incretin-based therapies and insulin secretagogues.
• Model system for studying stimulus-secretion coupling in endocrine cells.
• Relevant to islet transplantation and stem cell-derived beta cell therapies.
• Provides biomarkers for beta cell function in clinical research.
What Happens During regulation of insulin secretion involved in cellular response to glucose stimulus?
Glucose Uptake and Metabolism
In simple terms: Glucose enters the beta cell and is broken down to produce energy signals.
Glucose is transported into pancreatic beta cells primarily via GLUT2 (SLC2A2) and phosphorylated by glucokinase (GCK), the rate-limiting step in glucose sensing. Metabolism of glucose increases the ATP/ADP ratio, which closes ATP-sensitive potassium channels (KATP), leading to membrane depolarization. This metabolic coupling is essential for triggering insulin secretion in response to glucose.
Electrical Activity and Calcium Influx
In simple terms: The cell fires electrical signals that open calcium channels, letting calcium in.
Depolarization opens voltage-gated calcium channels (e.g., CACNA1C), causing calcium influx that triggers insulin granule exocytosis. The frequency and amplitude of calcium oscillations determine the rate of insulin release. This step is a key control point for regulation of insulin secretion.
Insulin Granule Trafficking and Exocytosis
In simple terms: Insulin-containing vesicles move to the cell membrane and release their contents.
Insulin granules are transported along the cytoskeleton and dock at the plasma membrane via SNARE proteins such as syntaxin-1A (STX1A) and VAMP2. Calcium binds to synaptotagmins to trigger membrane fusion and insulin release. This process is modulated by small GTPases and cytoskeletal dynamics.
Amplifying Pathways and Second Messengers
In simple terms: Other signals like cAMP boost the insulin release triggered by glucose.
Beyond the triggering pathway, amplifying pathways such as cAMP/PKA signaling enhance insulin secretion without further depolarization. cAMP also promotes intercellular coupling and synchronizes beta cell activity. These pathways fine-tune the secretory response to glucose.
Key Genes Involved in GO:0061178 regulation of insulin secretion involved in cellular response to glucose stimulus
The following genes are central to the regulation of insulin secretion in response to glucose, based on their established roles in beta cell function and diabetes.
| Gene | Major Role | Research Relevance |
|---|---|---|
| INS | Encodes insulin; the secreted hormone | Mutations cause neonatal diabetes; target for gene editing |
| GCK | Glucose phosphorylation; rate-limiting for glucose sensing | Mutations cause MODY2 and hyperinsulinism |
| SLC2A2 | Glucose transporter GLUT2; mediates glucose uptake | Defects cause Fanconi-Bickel syndrome |
| KCNJ11 | Kir6.2 subunit of KATP channel; controls membrane potential | Mutations cause neonatal diabetes or hyperinsulinism |
| ABCC8 | SUR1 subunit of KATP channel; regulates channel activity | Mutations cause neonatal diabetes or hyperinsulinism |
| CACNA1C | Voltage-gated calcium channel; mediates calcium influx | Target for modulating insulin secretion |
| STX1A | Syntaxin-1A; SNARE protein for granule fusion | Key for exocytosis; knockout impairs secretion |
| VAMP2 | Synaptobrevin-2; SNARE protein on granules | Essential for vesicle fusion |
| SNAP25 | SNARE protein; part of fusion machinery | Required for insulin exocytosis |
| CREB1 | Transcription factor; regulates beta cell survival and function | Modulates insulin secretion and beta cell mass |
| PKA (PRKACA) | cAMP-dependent protein kinase; amplifies secretion | Enhances insulin release via phosphorylation |
| EPAC (RAPGEF3) | cAMP sensor; promotes insulin secretion | Mediates PKA-independent effects of cAMP |
| SLC30A8 | Zinc transporter; required for insulin granule maturation | Associated with type 2 diabetes risk |
| G6PC2 | Glucose-6-phosphatase; modulates glucose sensing | GWAS locus for fasting glucose and diabetes |
| ADCYAP1 | PACAP; potentiates insulin secretion | Neuropeptide regulator of beta cell function |
| GCG | Glucagon; counter-regulatory hormone | Paracrine regulator of insulin secretion |
| SSTR2 | Somatostatin receptor; inhibits insulin secretion | Modulates beta cell activity |
How Is regulation of insulin secretion involved in cellular response to glucose stimulus Regulated?
The process of insulin secretion in response to glucose is regulated at multiple levels. cAMP signaling via PKA and EPAC amplifies secretion and promotes beta cell coupling. Transcription factors such as CREB1 regulate the expression of genes involved in beta cell function and survival. Additionally, calcium-independent phospholipase A2 (iPLA2) has been implicated in modulating insulin secretion through lipid signaling. These regulatory mechanisms ensure that insulin release is tightly matched to glucose levels.
regulation of insulin secretion involved in cellular response to glucose stimulus and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| GCK | MODY2; hyperinsulinism | Knock-in of patient mutations in beta cell lines |
| KCNJ11 | Neonatal diabetes; hyperinsulinism | Knockout and point mutation in INS-1 cells |
| ABCC8 | Neonatal diabetes; hyperinsulinism | CRISPR knock-in of mutations in iPSC-derived beta cells |
| INS | Neonatal diabetes | Knockout in human embryonic stem cells |
| SLC30A8 | Type 2 diabetes risk | Overexpression and knockout in MIN6 cells |
Type 2 Diabetes
Impaired regulation of insulin secretion is a hallmark of type 2 diabetes. Beta cells fail to compensate for insulin resistance, leading to hyperglycemia. Defects in both triggering and amplifying pathways contribute to secretory dysfunction.
Monogenic Diabetes
Mutations in genes such as GCK, KCNJ11, and ABCC8 cause monogenic forms of diabetes, including MODY and neonatal diabetes, by disrupting glucose sensing or KATP channel function.
Congenital Hyperinsulinism
Loss-of-function mutations in KATP channel genes (KCNJ11, ABCC8) lead to uncontrolled insulin secretion and hypoglycemia in infants.
From regulation of insulin secretion involved in cellular response to glucose stimulus-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X regulate glucose-stimulated insulin secretion? | CRISPR knockout in INS-1 or MIN6 cells |
| Does a specific point mutation affect insulin secretion? | Point mutation knock-in in beta cell lines |
| Can a risk variant alter insulin secretion? | Knock-in of SNP in iPSC-derived beta cells |
| Where is the protein localized during secretion? | Tagged knock-in (e.g., GFP) in beta cells |
| Does overexpression of gene Y enhance secretion? | Overexpression in primary islets or beta cell lines |
| What is the role of gene Z in beta cell development? | Knockout in mouse models or human iPSCs |
How to Study the regulation of insulin secretion involved in cellular response to glucose stimulus Process
| Method | What It Measures | Typical Application |
|---|---|---|
| CRISPR knockout screening | Gene requirement for insulin secretion | Identify novel regulators in beta cell lines |
| Live calcium imaging | Intracellular calcium dynamics | Assess triggering pathway in response to glucose |
| ELISA | Insulin secretion | Quantify glucose-stimulated insulin release |
| Patch-clamp | KATP channel activity and membrane potential | Study channelopathies in diabetes |
| RNA-seq | Transcriptional changes | Profile gene expression in knockout models |
| Proteomics | Protein abundance and modifications | Identify signaling changes |
| FRET biosensors | cAMP and PKA activity | Monitor amplifying pathways |
| TIRF microscopy | Granule docking and fusion | Visualize exocytosis events |
CRISPR Screening
Genome-wide CRISPR knockout or activation screens can identify genes that regulate insulin secretion. These screens use pooled sgRNA libraries and select for changes in secretion markers.
Live-Cell Imaging
Fluorescent reporters for calcium, cAMP, and insulin granule markers enable real-time monitoring of secretion dynamics in beta cells.
Transcriptomics and Proteomics
RNA-seq and proteomics reveal expression changes in genes and proteins involved in insulin secretion under different glucose conditions.
Electrophysiology
Patch-clamp recordings measure KATP channel activity and membrane potential changes that control insulin secretion.
How CRISPR Can Be Used to Study GO:0061178 regulation of insulin secretion involved in cellular response to glucose stimulus
Knockout
CRISPR knockout of candidate genes in beta cell lines or iPSCs can determine whether the gene is required for glucose-stimulated insulin secretion. For example, knockout of STX1A impairs exocytosis.
Point Mutation
Introducing patient-specific point mutations (e.g., in KCNJ11 or GCK) via CRISPR allows functional assessment of variants in isogenic backgrounds.
Knock-in
Knock-in of reporter tags (e.g., GFP) or disease alleles enables tracking of protein localization and secretion dynamics in live cells.
Overexpression
CRISPR activation (CRISPRa) or cDNA overexpression can test whether increased gene dosage enhances insulin secretion, useful for identifying amplifying factors.
How EDITGENE Supports regulation of insulin secretion involved in cellular response to glucose stimulus Research
Researchers studying regulation of insulin secretion involved in cellular response to glucose stimulus-related genes often need to determine whether a candidate gene is causally involved in beta cell dysfunction or diabetes. EDITGENE provides comprehensive CRISPR-based services to accelerate this research.
Contact EDITGENE today to design your custom CRISPR model for regulation of insulin secretion involved in cellular response to glucose stimulus research.
Frequently Asked Questions About regulation of insulin secretion involved in cellular response to glucose stimulus
What is GO:0061178?
GO:0061178 is a Gene Ontology biological process term for the regulation of insulin secretion involved in cellular response to glucose stimulus. It covers how cells modulate insulin release when glucose levels change.
What genes are involved in regulation of insulin secretion in response to glucose?
Key genes include INS, GCK, SLC2A2, KCNJ11, ABCC8, CACNA1C, STX1A, VAMP2, and SNAP25, among others.
How does glucose stimulate insulin secretion?
Glucose enters beta cells, is metabolized to increase ATP, closes KATP channels, depolarizes the membrane, opens calcium channels, and triggers insulin granule exocytosis.
What is the role of calcium in insulin secretion?
Calcium influx through voltage-gated channels is the trigger for insulin granule fusion with the plasma membrane.
What diseases are associated with defects in this process?
Type 2 diabetes, monogenic diabetes (MODY, neonatal diabetes), and congenital hyperinsulinism are linked to defects in glucose-stimulated insulin secretion.
How can CRISPR be used to study insulin secretion?
CRISPR knockout, point mutation, knock-in, and overexpression models allow causal testing of genes in beta cell lines and iPSCs.
What are the two phases of insulin secretion?
The first phase is a rapid release of docked granules, while the second phase involves mobilization of reserve granules; both are regulated by glucose.
What is the role of cAMP in insulin secretion?
cAMP amplifies insulin secretion via PKA and EPAC and promotes intercellular coupling in beta cells.
Which transcription factors regulate insulin secretion?
CREB1 is a key transcription factor that regulates beta cell function and survival, influencing insulin secretion.
How is insulin secretion measured in the lab?
Common methods include ELISA for insulin release, live-cell calcium imaging, patch-clamp electrophysiology, and FRET biosensors for cAMP.
Conclusion
GO:0061178 regulation of insulin secretion involved in cellular response to glucose stimulus is a fundamental biological process that integrates glucose sensing, electrical activity, and vesicle exocytosis. Its dysregulation underlies major forms of diabetes, making it a prime target for functional genomics and therapeutic development. CRISPR-based models and screening approaches offer powerful tools to dissect the genetic control of this process and identify new drug targets.
References
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- 4. Henquin JC. 2009. Regulation of insulin secretion: a matter of phase control and amplitude modulation.. Diabetologia 52(5):739-51 PMID: 19288076
- 5. Dalle S et al.. 2011. Roles and regulation of the transcription factor CREB in pancreatic β -cells.. Curr Mol Pharmacol 4(3):187-95 PMID: 21488836
- 6. Newsholme P et al.. 2010. Nutrient regulation of insulin secretion and beta-cell functional integrity.. Adv Exp Med Biol 654:91-114 PMID: 20217496
- 7. Wang Z et al.. 2009. Mechanisms of biphasic insulin-granule exocytosis - roles of the cytoskeleton, small GTPases and SNARE proteins.. J Cell Sci 122(Pt 7):893-903 PMID: 19295123
- 8. Lang J. 1999. Molecular mechanisms and regulation of insulin exocytosis as a paradigm of endocrine secretion.. Eur J Biochem 259(1-2):3-17 PMID: 9914469
