Related Experiment Video
Updated: Jun 8, 2026
06:27
Accelerated Type 1 Diabetes Induction in Mice by Adoptive Transfer of Diabetogenic CD4+ T Cells
Published on: May 6, 2013
Oxidative stress and autonomic nerve function in early type 1 diabetes
Robert Daniel Hoeldtke1, Kimberly D Bryner, Knox VanDyke
1LSU Medical School, Shreveport, LA, USA. rhoeld@lsuhsc.edu
Summary
Oxidative stress, indicated by elevated malondialdehyde and nitric oxide levels, is linked to sympathetic nerve dysfunction in early type 1 diabetes. Antioxidant therapies may help manage diabetic neuropathy.
Area of Science:
- Endocrinology
- Neurology
- Biochemistry
Background:
- Hyperglycemia's role in microvascular complications and neuropathy is unclear.
- Oxidative stress is observed in diabetic rodents and humans, but its clinical significance is uncertain.
- Antioxidant therapy shows promise in experimental models of diabetic neuropathy.
Purpose of the Study:
- To investigate the association between oxidative stress markers and nerve function in recent-onset type 1 diabetes.
- To longitudinally assess biochemical measures of oxidative stress and autonomic/somatosensory function over three years.
Main Methods:
- A 3-year longitudinal study of 37 patients with recent-onset type 1 diabetes and 41 controls.
- Biochemical analysis included urinary malondialdehyde (MDA) and serum nitric oxide (NOx).
- Nerve function was assessed via sudomotor and autonomic testing, including the renin/prorenin ratio.
Main Results:
- Diabetic patients exhibited significantly higher urinary MDA and serum NOx levels compared to controls across all three years.
- Abnormal sudomotor function (altered sweating patterns) and renin/prorenin ratio were observed in diabetic patients.
- Urinary MDA and serum NOx levels correlated negatively with sweat function, indicating impaired sympathetic nerve activity.
Conclusions:
- Elevated oxidative stress markers and serum NOx are associated with sympathetic dysfunction in early type 1 diabetes.
- These findings suggest a potential role for oxidative stress in the pathogenesis of diabetic neuropathy.
- Further research into antioxidant interventions for diabetic neuropathy is warranted.
Related Concept Videos
01:24Type 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.
01:22Diabetic Neuropathy
DefinitionDiabetic neuropathy is nerve damage caused by long-standing diabetes mellitus. It results directly from prolonged high blood sugar levels.PathophysiologyThe pathophysiology of diabetic neuropathy involves both metabolic and vascular disturbances triggered by chronic hyperglycemia.Metabolic injury: Elevated glucose levels activate the polyol pathway within nerve cells, leading to the accumulation of sorbitol and fructose. This increases oxidative stress, disrupts normal nerve...
01:12Type I Diabetes I: Introduction
Type 1 diabetes mellitus is a chronic metabolic disorder characterized by an absolute deficiency of insulin resulting from the autoimmune destruction of pancreatic β-cells. Although it can occur at any age, it is most commonly diagnosed in childhood, adolescence, or early adulthood. The loss of insulin production impairs cellular glucose uptake, resulting in persistent hyperglycemia and necessitating lifelong insulin therapy.Autoimmune Destruction of β-CellsThe hallmark of type 1 diabetes is an...
01:26Type 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...
01:19Psychoneuroimmunology: Diabetes and Cancer
Chronic stress has been linked to both the onset and progression of serious health conditions, including Type 2 diabetes and cancer. Type 2 diabetes, a widespread chronic illness, is closely associated with obesity and insulin resistance, both of which often worsen under stress. Studies indicate that men experiencing high levels of chronic stress face a 45% higher risk of developing diabetes compared to those with minimal stress. Stress triggers physiological responses that elevate blood...
01:26Type 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...