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Pathophysiology of Diabetes

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...

Type I Diabetes II: Pathophysiology

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: Pathophysiology

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: Symptoms, Diagnosis, and Complications

Diabetes: Symptoms, Diagnosis, and Complications

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 based on...

Diabetic Retinopathy

Diabetic Retinopathy

DefinitionDiabetic retinopathy is a microvascular complication of diabetes affecting the retinal blood vessels.Risk FactorsDiabetic retinopathy is present in almost all individuals with type 1 diabetes and more than 60% of those with type 2 diabetes after two decades of disease.The risk increases with poor glycemic control, hypertension, dyslipidemia, smoking, pregnancy, and puberty.Although cataracts and glaucoma are also more frequent in people with diabetes, retinopathy remains the leading...

Type I Diabetes III: Clinical Manifestations

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...

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Updated: Jun 25, 2026

Extracellular Glucose Depletion as an Indirect Measure of Glucose Uptake in Cells and Tissues Ex Vivo

Extracellular Glucose Depletion as an Indirect Measure of Glucose Uptake in Cells and Tissues Ex Vivo

Published on: April 6, 2022

[Diabetology].

Marc Egli¹, Juan Ruiz

¹Service d'endocrinologie, diabétologie et métabolisme CHUV, 1011 Lausanne. Marc.Egli@chuv.ch

Revue Medicale Suisse

|February 26, 2009

Summary

This summary is machine-generated.

Optimal glycemic control in type 2 diabetes shows modest morbidity benefits but conflicting mortality results. Long-term follow-up suggests sustained advantages, emphasizing individualized patient care to balance risk factors and minimize hypoglycemia.

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A Zebrafish Model of Diabetes Mellitus and Metabolic Memory

A Zebrafish Model of Diabetes Mellitus and Metabolic Memory

Published on: February 28, 2013

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Last Updated: Jun 25, 2026

Extracellular Glucose Depletion as an Indirect Measure of Glucose Uptake in Cells and Tissues Ex Vivo

Extracellular Glucose Depletion as an Indirect Measure of Glucose Uptake in Cells and Tissues Ex Vivo

Published on: April 6, 2022

A Zebrafish Model of Diabetes Mellitus and Metabolic Memory

A Zebrafish Model of Diabetes Mellitus and Metabolic Memory

Published on: February 28, 2013

Area of Science:

Endocrinology
Metabolic Diseases
Clinical Trials

Context:

Type 2 diabetes management is complex, with ongoing debate on the optimal glycemic control strategy.
Recent trials like ACCORD and AVANCE (2008) yielded mixed results regarding intensive glycemic control's impact on morbidity and mortality.
The short intervention duration in some trials contrasts with UKPDS's long-term follow-up data.

Purpose:

To evaluate the impact of glycemic control on morbidity and mortality in type 2 diabetes.
To analyze the short-term and long-term outcomes of different glycemic control strategies.
To highlight the need for individualized treatment approaches in type 2 diabetes.

Summary:

ACCORD and AVANCE trials showed modest morbidity benefits but conflicting mortality outcomes with intensive glycemic control.
Intensive glycemic control in ACCORD was associated with increased mortality.
UKPDS post-trial follow-up demonstrated a persistent benefit of glycemic control for 10 years.

Impact:

Findings underscore the importance of considering trial duration and long-term effects in diabetes research.
Emphasizes the need for personalized treatment plans for type 2 diabetes patients.
Highlights the critical balance between achieving glycemic control and minimizing hypoglycemia risks.