Related Experiment Video
Updated: Sep 19, 2025
11:48
Isolation Protocol of Mouse Monocyte-derived Dendritic Cells and Their Subsequent In Vitro Activation with Tumor Immune Complexes
Published on: May 31, 2018
11.6K
Gliadin amplifies the macrophage response triggered by stressed beta cells
Tina Zenia Jørgensen1, Knud Josefsen2, Signe Stentoft Dissing1
1The Bartholin Institute, Rigshospitalet, Copenhagen, Denmark; Novo Nordisk, Bagsværd, Denmark.
Cellular Immunology
|June 15, 2025
Summary
A gluten-free diet may benefit type 1 diabetes by reducing cellular stress and immune activation. Gliadin, a gluten component, directly stimulates pancreatic beta cells, impacting immune responses and disease progression.
Area of Science:
- Immunology
- Endocrinology
- Cell Biology
Background:
- A gluten-free diet shows promise in managing type 1 diabetes in humans and NOD mice.
- Both beta cell activity and gluten influence autoimmune diabetes incidence.
Purpose of the Study:
- To investigate the impact of gliadin on metabolically stressed pancreatic cells and macrophages.
- To elucidate the cellular mechanisms underlying the benefits of a gluten-free diet in type 1 diabetes.
Main Methods:
- Utilized metabolically stressed pancreatic cell lines (MIN6, beta TC3, alpha TC3) and RAW 264.7 macrophage cells.
- Assessed the effect of gliadin on cellular activation, stress responses, and immune regulation pathways.
Main Results:
- Metabolically stressed pancreatic cells activated macrophages.
- Gliadin enhanced this activation in MIN6 cells, but not in beta TC3 or alpha TC3 cells.
- Gliadin directly stimulated MIN6 cells, influencing pathways involved in cellular activation, stress, and immune regulation.
Conclusions:
- Cellular stress and gliadin play significant roles in type 1 diabetes progression.
- Findings support the in vivo benefits of a gluten-free diet by highlighting gliadin's cellular effects.
Related Concept Videos
01:16Hormones Regulating Blood Glucose
4.1K
Insulin is released by beta cells of the pancreas when blood glucose levels are high. It facilitates glucose absorption and utilization in insulin-dependent cells with insulin receptors on their plasma membranes. Insulin promotes glucose uptake by increasing the number of glucose transport proteins in the cell membrane, allowing glucose to enter the cell. As a result, glucose utilization and ATP production are enhanced.
In addition to accelerating glucose uptake and utilization, insulin has...
In addition to accelerating glucose uptake and utilization, insulin has...
4.1K
01:05Insulin Secretory Vesicles
5.4K
Insulin secretory vesicles release insulin to stimulate blood glucose uptake and regulate carbohydrate metabolism. When the blood glucose levels increase, glucose enters the pancreatic β-islet cells through glucose transporters. Once inside, glucose is metabolized through glycolysis, the citric acid cycle, and the electron transport chain, producing ATP. This increase in ATP concentration closes ATP-sensitive potassium channels, leading to depolarization of the membrane and the opening of...
5.4K
01:09GPCRs Regulate Adenylyl Cylase Activity
6.0K
Some GPCRs transmit signals through adenylyl cyclase (AC), a transmembrane enzyme. AC helps synthesize second messenger cyclic adenosine monophosphate (cAMP). AC catalyzes cyclization reaction and converts ATP to cAMP by releasing a pyrophosphate. The pyrophosphate is further hydrolyzed to phosphate by the enzyme pyrophosphatase, which drives cAMP synthesis to completion. However, cAMP is rapidly degraded to 5′ AMP by the enzymes phosphodiesterase (PDE), preventing overstimulation of...
6.0K
01:27Glucose Homeostasis: Pancreatic Islets and Insulin Secretion
1.4K
The pancreatic islets comprising only 1%-2% of the volume are highly vascularized and innervated mini-organs. They contain five endocrine cell types, including β cells that secrete insulin, which is synthesized as a single polypeptide chain, preproinsulin, processed to proinsulin, and finally to insulin and C-peptide. This process is complex and regulated, involving the Golgi complex, the endoplasmic reticulum, and the secretory granules of the β cell.
Insulin and C-peptide are...
Insulin and C-peptide are...
1.4K
01:25cAMP-dependent Protein Kinase Pathways
6.7K
Cyclic Adenosine Monophosphate (cAMP) is an essential second messenger that activates protein kinase A (PKA) and regulates various biological processes. A single epinephrine molecule binds to GPCR and activates several heterotrimeric G proteins, each stimulating multiple adenylyl cyclase, amplifying the signal, and synthesizing large numbers of cAMP molecules. Small changes in cAMP concentration affect PKA activity. The binding of four cAMP molecules induces a conformational change in PKA,...
6.7K
01:24Glucagon-like Receptor Agonists
438
Incretins include glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP), which stimulate insulin secretion post-meals. In type 2 diabetes, GIP's efficacy is reduced, making GLP-1 a viable drug target. GIP originates from preproGIP.
GLP-1, when administered in high doses intravenously, triggers insulin secretion, inhibits glucagon release, slows gastric emptying, reduces food intake, and restores normal insulin secretion. However, its rapid inactivation by...
GLP-1, when administered in high doses intravenously, triggers insulin secretion, inhibits glucagon release, slows gastric emptying, reduces food intake, and restores normal insulin secretion. However, its rapid inactivation by...
438