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Related Concept Videos

Diabetes Mellitus: Type 2 and Gestational01:22

Diabetes Mellitus: Type 2 and Gestational

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

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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...
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Type I Diabetes II: Pathophysiology01:26

Type I Diabetes II: Pathophysiology

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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...
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Role of Skin in Vitamin D Synthesis01:23

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The skin plays a crucial role in the synthesis of vitamin D, a vital nutrient for various physiological processes in the body. Vitamin D is unique because it can be synthesized in the skin through a series of chemical reactions triggered by exposure to ultraviolet B (UVB) radiation from sunlight.
The solar UV B rays (290-315 nm) are absorbed by the skin, and 7-dehydrocholesterol (provitamin D3) photolyzes it to previtamin D3, which undergoes a rapid transformation to vitamin...
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Diabetes: Symptoms, Diagnosis, and Complications01:15

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For most patients, experiencing several weeks of polyuria, polydipsia, fatigue, and significant weight loss may indicate the presence of diabetes. Furthermore, adults displaying the phenotypic appearance of type 2 diabetes (particularly those who are obese and not initially insulin-requiring), may have islet cell autoantibodies, suggesting autoimmune-mediated β cell destruction and a diagnosis of latent autoimmune diabetes of adults (LADA). The categorization of glucose homeostasis is...
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Type II Diabetes II: Pathophysiology01:24

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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.
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Related Experiment Video

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Vitamin D and diabetes.

Joanna Mitri1, Anastassios G Pittas2

  • 1Division of Endocrinology, Diabetes and Metabolism, Prima CARE Medical Center, 277 Pleasant Street, Fall River, MA 02721, USA.

Endocrinology and Metabolism Clinics of North America
|March 4, 2014
PubMed
Summary
This summary is machine-generated.

Vitamin D may influence diabetes risk by affecting insulin action and inflammation. Current research suggests a link between vitamin D and type 2 diabetes, but more studies are needed to confirm this association.

Keywords:
25-hydroxyvitamin DInsulin resistanceInsulin sensitivityType 2 diabetesVitamin D

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Area of Science:

  • Endocrinology
  • Nutritional Science
  • Metabolic Disorders

Background:

  • Growing evidence suggests a potential role for vitamin D in diabetes prevention and management.
  • Vitamin D influences key pathways in type 2 diabetes pathophysiology, including pancreatic beta-cell function, insulin sensitivity, and inflammation.

Purpose of the Study:

  • To explore the biological mechanisms linking vitamin D to type 2 diabetes.
  • To review human studies investigating the association between vitamin D levels and type 2 diabetes risk.
  • To briefly examine the potential relationship between vitamin D and type 1 diabetes.

Main Methods:

  • Review of existing literature on vitamin D metabolism and diabetes.
  • Analysis of epidemiological and clinical studies examining vitamin D status in relation to type 2 diabetes.
  • Summary of evidence regarding vitamin D's impact on pancreatic function, insulin resistance, and inflammation.

Main Results:

  • Biologic plausibility supports a role for vitamin D in diabetes. Mechanisms include direct effects on pancreatic beta cells and indirect effects on insulin sensitivity and inflammation.
  • Human studies provide suggestive, but not conclusive, evidence for an association between vitamin D deficiency and increased type 2 diabetes risk.
  • Limited data exists on the association between vitamin D and type 1 diabetes.

Conclusions:

  • Vitamin D's multifaceted effects on metabolic processes present a strong biological rationale for its potential role in type 2 diabetes.
  • While observational studies indicate a possible link, further research, including randomized controlled trials, is necessary to establish causality.
  • The relationship between vitamin D and type 1 diabetes warrants further investigation.