Related Experiment Video
Updated: Jun 25, 2026
08:34
Precise Visualization of Insulin Receptors A and B in Murine Brain with an RNA In Situ Hybridization Assay
Published on: July 15, 2025
IRS-2 and its involvement in diabetes and aging.
1Rigel Pharmaceuticals, Inc., South San Francisco, California 94080, USA.
Vitamins and Hormones
|March 3, 2009
Summary
Insulin receptor substrate 2 (IRS-2) is vital for insulin signaling, metabolism, and growth. Reduced IRS-2 expression links to diabetes, insulin resistance, and impacts reproductive and pancreas development, and lifespan.
Area of Science:
- Molecular biology
- Endocrinology
- Metabolic research
Background:
- Insulin receptor substrate 2 (IRS-2) acts as a crucial adaptor protein in insulin signaling.
- It activates downstream kinase cascades like MAP kinase and PI-3 kinase.
- Reduced IRS-2 expression is linked to diabetes and insulin resistance in rodent models.
Purpose of the Study:
- To review the known functions of IRS-2.
- To highlight its role in metabolism and growth.
- To discuss its involvement in reproductive and pancreas development and lifespan regulation.
Main Methods:
- Literature review of studies on IRS-2.
- Analysis of its role in insulin signaling pathways.
- Examination of its association with metabolic diseases and development.
Main Results:
- IRS-2 is essential for activating key kinase cascades.
- Its reduced expression is a marker for diabetes and insulin resistance.
- IRS-2 influences reproductive system, pancreas development, and lifespan.
Conclusions:
- IRS-2 is a multifunctional protein with significant roles in metabolic regulation, development, and aging.
- Understanding IRS-2 is critical for addressing metabolic disorders and related conditions.
Related Concept Videos
01:26Type II Diabetes I: Introduction
Type 2 diabetes mellitus (T2DM) is a chronic metabolic disorder characterized by insulin resistance, in which target tissues such as the liver, muscle, and adipose tissue respond poorly to insulin. It is also associated with inadequate compensatory insulin secretion, where pancreatic β-cells fail to produce sufficient insulin. Together, these abnormalities lead to persistent hyperglycemia.EtiologyT2DM develops through a complex interaction of genetic predisposition and environmental or...
01:24Type II Diabetes II: Pathophysiology
PathophysiologyType 2 diabetes mellitus (T2DM ) is a chronic metabolic disorder characterized by insulin resistance and progressive pancreatic β-cell dysfunction, leading to impaired glucose homeostasis. It results from interactions among genetic predisposition, environmental factors, and metabolic stressors, such as overnutrition and a sedentary lifestyle.Insulin Resistance and Glucose DysregulationEarly T2DM involves insulin resistance in skeletal muscle, adipose tissue, and the liver.
01:26Type I Diabetes II: Pathophysiology
Type 1 diabetes mellitus arises from an immune-mediated destruction of pancreatic β-cells, resulting in an absolute deficiency of insulin. This process develops in genetically susceptible individuals when autoimmunity, environmental exposures, and immunologic dysregulation converge to trigger a targeted attack on the insulin-producing cells of the pancreas. The β-cells are located within the islets of Langerhans and are essential for regulating blood glucose by facilitating cellular uptake of...
01:22Diabetes Mellitus: Type 2 and Gestational
Type 2 diabetes, characterized by insulin resistance, arises when the insulin receptors on cells lose responsiveness to insulin, diminishing the cell's capacity to take up glucose, resulting in elevated blood glucose levels. To receive a diagnosis of Type 2 diabetes, a series of blood glucose tests are necessary to assess whether the blood glucose falls within normal parameters. If the result is out of the normal range, a patient may be diagnosed as prediabetic or diabetic, depending on the...
01:19Psychoneuroimmunology: Diabetes and Cancer
Chronic stress has been linked to both the onset and progression of serious health conditions, including Type 2 diabetes and cancer. Type 2 diabetes, a widespread chronic illness, is closely associated with obesity and insulin resistance, both of which often worsen under stress. Studies indicate that men experiencing high levels of chronic stress face a 45% higher risk of developing diabetes compared to those with minimal stress. Stress triggers physiological responses that elevate blood...
01:28Insulin: The Receptor and Signaling Pathways
Insulin action is mediated through a receptor tyrosine kinase, akin to the IGF-1 receptor. The number of receptors per cell varies significantly, from 40 on erythrocytes to 300,000 on adipocytes and hepatocytes. The insulin receptor consists of linked α/β subunit dimers, forming a heterotetramer glycoprotein with two extracellular α subunits and two β subunits spanning the membrane. The α subunits inhibit the inherent tyrosine kinase activity of the β subunits, but this inhibition is released...