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Related Concept Videos

Type II Diabetes II: Pathophysiology01:24

Type 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.
Diabetes Mellitus: Introduction01:26

Diabetes Mellitus: Introduction

Diabetes mellitus consists of chronic metabolic disorders characterized by persistent hyperglycemia. This elevated blood glucose results from defects in insulin secretion, impaired insulin action, or both. Insulin, produced by pancreatic β-cells, is essential for maintaining glucose homeostasis by facilitating cellular glucose uptake for energy or storage. Disruptions in insulin production or function lead to glucose accumulation in the bloodstream, causing the clinical features and long-term...
Hormones Regulating Blood Glucose01:16

Hormones Regulating Blood Glucose

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...
Hypoglycemia and Glucagon01:15

Hypoglycemia and Glucagon

Without prolonged fasting, healthy individuals maintain blood glucose levels above 3.5 mM due to a well-adapted neuroendocrine counterregulatory system that effectively prevents acute hypoglycemia, a potentially life-threatening condition. The primary clinical scenarios for hypoglycemia encompass diabetes treatment, inappropriate production of endogenous insulin or insulin-like substances by tumors, and the use of glucose-lowering agents in non-diabetic individuals. Notably, hypoglycemia in the...
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...
Pathophysiology of Diabetes01:20

Pathophysiology of Diabetes

Diabetes mellitus is a chronic metabolic disorder characterized by hyperglycemia. The four categories of diabetes are type 1 diabetes, type 2 diabetes, other specific types of diabetes, and gestational diabetes.
Type 1 diabetes is characterized by autoimmune-mediated destruction of pancreatic β cells, with environmental factors potentially triggering this process in genetically susceptible individuals. Despite many not having a family history, certain genes increase susceptibility, suggesting a...

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White and Brown Adipose Grafts: An Approach to Correct Reproductive, Metabolic, and Renal Deficits in Black and Tan Brachyury (BTBR) Obese Mice
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Leptin, diabetes, and the brain.

Thomas H Meek1, Gregory J Morton

  • 1Diabetes and Obesity Center of Excellence, Department of Medicine, University of Washington, Seattle, WA, USA.

Indian Journal of Endocrinology and Metabolism
|April 9, 2013
PubMed
Summary
This summary is machine-generated.

Leptin, an adiposity hormone, regulates glucose metabolism through brain pathways. Dysfunction in leptin signaling may contribute to diabetes, suggesting leptin or its targets as potential therapeutic treatments.

Keywords:
Braindiabetesglucoseinsulinleptin

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Area of Science:

  • Endocrinology
  • Neuroscience
  • Metabolic Disorders

Background:

  • Diabetes mellitus presents a significant global health challenge.
  • Current antidiabetic agents struggle to achieve optimal glycemic control without adverse effects.
  • Complications of diabetes include renal, retinal, and neuropathic damage.

Purpose of the Study:

  • To review the role of leptin action in the central nervous system (CNS).
  • To examine the mechanisms by which leptin regulates glucose metabolism.
  • To explore the therapeutic potential of leptin signaling in diabetes treatment.

Main Methods:

  • Literature review focusing on leptin's role in glucose homeostasis.
  • Analysis of studies investigating central nervous system pathways of leptin.
  • Examination of evidence linking leptin signaling to diabetes etiology.

Main Results:

  • Leptin, beyond energy homeostasis, significantly impacts glucose metabolism via CNS actions.
  • Leptin mediates its glucose-regulating effects through specific neural pathways.
  • Evidence suggests leptin signaling is crucial for maintaining metabolic balance.

Conclusions:

  • Defects in leptin signaling may be implicated in the development of diabetes.
  • Leptin or its downstream targets represent promising avenues for novel diabetes therapies.
  • Targeting central leptin pathways could offer a new strategy for glycemic control.