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Pathophysiology of Diabetes01:20

Pathophysiology of Diabetes

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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.
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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 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.
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Overview of Carbohydrate Metabolism01:19

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Carbohydrate metabolism is a fundamental biochemical process that ensures a constant supply of energy to living cells. The most important carbohydrate is glucose, which can be broken down via glycolysis to enter into the Krebs cycle and eventually lead to the production of ATP through oxidative phosphorylation.
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Hypoglycemia and Glucagon01:15

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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...
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Hyperglycaemia is a causal risk factor for upper limb pathologies.

Harry D Green1, Ella Burden2, Ji Chen1

  • 1Department of Clinical and Biomedical Sciences, University of Exeter, Exeter, UK.

International Journal of Epidemiology
|January 11, 2024
PubMed
Summary
This summary is machine-generated.

High blood sugar (glycaemia) and obesity causally link to upper limb musculoskeletal conditions like frozen shoulder and carpal tunnel syndrome. These findings highlight the need for awareness among clinicians treating diabetes patients.

Keywords:
DiabetesDupuytren’scarpal tunnel syndromecausalityfrozen shoulderhyperglycaemiamendelian randomizationmusculoskeletaltrigger finger

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Area of Science:

  • Genetics and Musculoskeletal Health
  • Endocrinology and Metabolic Disorders
  • Epidemiology and Biostatistics

Background:

  • Diabetes and obesity are linked to various musculoskeletal disorders, but causal mechanisms for upper limb conditions remain unclear.
  • This study investigates the causal relationship between glycemia, obesity, and specific upper limb pathologies using genetic approaches.
  • Understanding these links is crucial for managing diabetes-related complications.

Purpose of the Study:

  • To determine the causal effect of long-term high glycemia and adiposity on four upper limb musculoskeletal conditions: frozen shoulder, Dupuytren's disease, carpal tunnel syndrome, and trigger finger.
  • To utilize Mendelian randomization (MR) analyses to establish causality.
  • To investigate the role of GCK gene variants in these associations.

Main Methods:

  • Employed Mendelian randomization (MR) analyses in a large UK Biobank cohort (N=379,708) of European ancestry.
  • Assessed the causal impact of genetically predicted long-term high glycemia (HbA1c) and adiposity (BMI, body fat) on the selected musculoskeletal conditions.
  • Conducted single-gene MR using rare variants in the GCK gene.

Main Results:

  • Long-term high glycemia showed a causal role in frozen shoulder, Dupuytren's disease, trigger finger, and carpal tunnel syndrome.
  • GCK mutation carriers had increased odds of frozen shoulder and carpal tunnel syndrome.
  • Increased genetically predicted body mass index (BMI) was associated with carpal tunnel syndrome and negatively with Dupuytren's disease.
  • Increased body fat percentage was significantly associated with trigger finger and carpal tunnel syndrome.

Conclusions:

  • This study provides consistent evidence for a causal role of long-term high glycemia in the development of upper limb musculoskeletal conditions.
  • Clinicians should consider upper limb musculoskeletal conditions as potential diabetes complications, particularly in GCK mutation carriers.
  • Awareness of these associations is vital for comprehensive patient care in diabetes management.