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Related Concept Videos

Type I Diabetes I: Introduction01:12

Type I Diabetes I: Introduction

Type 1 diabetes mellitus is a chronic metabolic disorder characterized by an absolute deficiency of insulin resulting from the autoimmune destruction of pancreatic β-cells. Although it can occur at any age, it is most commonly diagnosed in childhood, adolescence, or early adulthood. The loss of insulin production impairs cellular glucose uptake, resulting in persistent hyperglycemia and necessitating lifelong insulin therapy.Autoimmune Destruction of β-CellsThe hallmark of type 1 diabetes is an...
Type I Diabetes II: Pathophysiology01:26

Type 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...
Diabetes Mellitus: Overview and Type I Subtype01:22

Diabetes Mellitus: Overview and Type I Subtype

Diabetes mellitus is a chronic metabolic disorder characterized by high blood glucose levels due to inadequate insulin production, insulin resistance, or both. The condition affects millions worldwide and can significantly impact their health and quality of life.
Type 1 diabetes is an autoimmune disease in which the immune system mistakenly attacks and destroys the insulin-producing beta cells in the pancreas. As a result, the body is unable to produce sufficient insulin, and individuals with...
Type I Diabetes III: Clinical Manifestations01:19

Type I Diabetes III: Clinical Manifestations

Type 1 diabetes mellitus typically presents with rapid-onset symptoms due to the body’s inability to utilize glucose in the absence of insulin. Since insulin is required for glucose uptake into cells, its deficiency leads to hyperglycemia and cellular energy deprivation, resulting in characteristic clinical features.Polyuria and PolydipsiaOne of the earliest, most prominent symptoms is polyuria (excessive urination). When blood glucose concentrations rise above the renal threshold, the kidneys...
Autoimmune Disorders01:29

Autoimmune Disorders

Autoimmune diseases are a group of disorders in which the body's immune system mistakenly attacks its own cells, tissues, and organs. This results from an overactive immune response against substances and tissues normally present in the body. Let's delve into the concept and mechanism of autoimmune diseases from an immune system point of view, explore different causes and examples of such diseases, and discuss potential solutions.
Concept and Mechanism of Autoimmune Diseases
The immune system...
Type II Diabetes I: Introduction01:26

Type 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...

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Related Experiment Video

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A High-Throughput Multiplexed Screening for Type 1 Diabetes, Celiac Diseases, and COVID-19
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'Sensing' autoimmunity in type 1 diabetes.

Hubert Tsui1, Rozita Razavi, Yin Chan

  • 1The Hospital for Sick Children, Department of Neuroscience and Mental Health, 555 University Avenue, 10128 Elm Wing Toronto, ON, M5G 1X8, Canada.

Trends in Molecular Medicine
|September 29, 2007
PubMed
Summary
This summary is machine-generated.

Type 1 diabetes involves neuronal dysfunction, not just autoimmunity. Restoring sensory neuron function in a mouse model reversed inflammation and normalized blood sugar, suggesting new therapeutic avenues.

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Published on: May 6, 2013

Area of Science:

  • Neuroimmunology
  • Endocrinology
  • Autoimmune Diseases

Background:

  • Type 1 diabetes (T1D) is characterized by autoimmune destruction of insulin-producing beta-cells.
  • Emerging evidence points to a significant role for neuronal mechanisms in T1D pathogenesis.
  • Sensory neurons and their channels, like TRPV1, are implicated in beta-cell stress and inflammation.

Purpose of the Study:

  • To investigate the neuro-immuno-endocrine mechanisms underlying T1D development.
  • To explore the role of sensory neuron dysfunction in the non-obese diabetic (NOD) mouse model.
  • To evaluate the therapeutic potential of modulating neuronal function in T1D.

Main Methods:

  • Utilized the non-obese diabetic (NOD) mouse model to study T1D.
  • Investigated the function of the sensory neuron channel TRPV1 in beta-cell stress.
  • Administered the neurotransmitter substance P to modulate neuronal function.

Main Results:

  • Mutant TRPV1 channels in sensory neurons were found to initiate progressive beta-cell stress and inflammation in NOD mice.
  • Normalizing neuronal function with substance P treatment reduced islet inflammation, insulin resistance, and restored normoglycemia.
  • These findings highlight a novel mechanism of organ-specific damage mediated by sensory afferent neurons.

Conclusions:

  • Sensory neurons play a critical role in T1D pathogenesis through local secretory dysfunction.
  • Modulating neuronal function, specifically with substance P, offers a promising therapeutic strategy for T1D.
  • This neuro-immuno-endocrine model opens new avenues for treating T1D and potentially other autoimmune disorders.