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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...
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...
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...
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...
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.
Hyperglycemia01:29

Hyperglycemia

Hyperglycemia is an abnormally high blood glucose level. It is diagnosed by fasting glucose ≥126 mg/dL, 2-hour oral glucose tolerance test (or OGTT) ≥200 mg/dL, random glucose ≥200 mg/dL with symptoms, or HbA1c ≥6.5%. However, HbA1c results may be unreliable in certain conditions, such as anemia or hemoglobinopathies, and the diagnosis should be confirmed unless classic symptoms are present. Postprandial hyperglycemia is typically considered significant when glucose levels exceed 180 mg/dL two...

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相关实验视频

Updated: Jul 12, 2026

Hyperinsulinemic-euglycemic Clamps in Conscious, Unrestrained Mice
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Published on: November 16, 2011

超胰岛素血症,高血糖症和血液静止障碍:弗雷明汉子女研究

J B Meigs1, M A Mittleman, D M Nathan

  • 1General Medicine Division and Department of Medicine, Massachusetts General Hospital and Harvard Medical School, Institute for Prevention of Cardiovascular Disease, Boston 02114, USA. jmeigs@partners.org

JAMA
|January 14, 2000
PubMed
概括

高禁食胰岛素水平与正常耐葡萄糖的人的血液凝固问题有关. 在那些患有葡萄糖不耐受的人中,高胰岛素血症主要影响血液凝块的分解,可能增加心血管疾病的风险.

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Combined Intravital Microscopy and Contrast-enhanced Ultrasonography of the Mouse Hindlimb to Study Insulin-induced Vasodilation and Muscle Perfusion
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Study of In Vivo Glucose Metabolism in High-fat Diet-fed Mice Using Oral Glucose Tolerance Test (OGTT) and Insulin Tolerance Test (ITT)
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Study of In Vivo Glucose Metabolism in High-fat Diet-fed Mice Using Oral Glucose Tolerance Test (OGTT) and Insulin Tolerance Test (ITT)

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Last Updated: Jul 12, 2026

Hyperinsulinemic-euglycemic Clamps in Conscious, Unrestrained Mice
11:10

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Published on: November 16, 2011

Combined Intravital Microscopy and Contrast-enhanced Ultrasonography of the Mouse Hindlimb to Study Insulin-induced Vasodilation and Muscle Perfusion
08:22

Combined Intravital Microscopy and Contrast-enhanced Ultrasonography of the Mouse Hindlimb to Study Insulin-induced Vasodilation and Muscle Perfusion

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Study of In Vivo Glucose Metabolism in High-fat Diet-fed Mice Using Oral Glucose Tolerance Test (OGTT) and Insulin Tolerance Test (ITT)
08:13

Study of In Vivo Glucose Metabolism in High-fat Diet-fed Mice Using Oral Glucose Tolerance Test (OGTT) and Insulin Tolerance Test (ITT)

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科学领域:

  • 心血管疾病研究研究
  • 代谢健康 代谢健康
  • 血液静止和血栓形成

背景情况:

  • 葡萄糖不耐受性中心血管疾病 (CVD) 的风险并不能完全由传统的风险因素来解释.
  • 超胰岛素血症可能会直接增加心血管疾病风险,或通过血液静止受损来调解.

研究的目的:

  • 评估空腹胰岛素水平与静血因素之间的关联.
  • 评估正常和受损葡萄糖平衡的个体中的这些关联.

主要方法:

  • 对弗雷明汉姆后代研究 (1991-1995) 的横截面分析.
  • 包括2962名26-82岁的成年人,按葡萄糖耐受性分类.
  • 评估禁食胰岛素和PAI-1,tPA,vWF,因子VII,纤维原和血粘度的水平,并根据心血管疾病风险因素进行调整.

主要成果:

  • 在正常的葡萄糖耐受性下,所有静血因子随着禁食胰岛素五分之一的增加 (男性的纤维素素除外).
  • 在葡萄糖不耐受性和正常耐受性方面,PAI-1和tPA抗原的含量更高.
  • 在葡萄糖不耐受症中,PAI-1,tPA和vWF (男性) 与胰岛素五分之一增加,但因子VII,纤维素和血粘度没有.

结论:

  • 禁食胰岛素升高与正常葡萄糖耐受性中的纤维解酶和高凝血能力受损有关.
  • 高胰岛素血症主要与葡萄糖不耐症中的纤维素分解受损有关.
  • 由高胰岛素血症和葡萄糖不耐症引起的心血管疾病风险增加可能源于急性血栓形成的潜力增加.