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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 I Diabetes I: Introduction

Type 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...

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...

Diabetes Mellitus: Overview and Type I Subtype

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...

Diabetes Mellitus: Type 2 and Gestational

Diabetes Mellitus: Type 2 and Gestational

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...

Type II Diabetes I: Introduction

Type 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...

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Related Experiment Video

Updated: Jun 30, 2026

Accelerated Type 1 Diabetes Induction in Mice by Adoptive Transfer of Diabetogenic CD4+ T Cells

Accelerated Type 1 Diabetes Induction in Mice by Adoptive Transfer of Diabetogenic CD4+ T Cells

Published on: May 6, 2013

[Cataract and type 1 diabetes mellitus].

Melissa Manfroi Dal Pizzol¹, Jorge Freita Esteves, Caio Augusto Sccoco

¹Serviço de Oftalmologia, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil. melidp@via-rs.net

Arquivos Brasileiros De Oftalmologia

|September 18, 2008

Summary

Diabetic retinopathy significantly increases cataract risk in type 1 diabetes patients. This study found a 19.9% cataract prevalence, highlighting diabetic retinopathy as a key factor.

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Accelerated Type 1 Diabetes Induction in Mice by Adoptive Transfer of Diabetogenic CD4+ T Cells

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Modeling Cataract Surgery in Mice

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Published on: December 1, 2023

Area of Science:

Ophthalmology
Endocrinology
Diabetology

Context:

Type 1 diabetes presents unique challenges for ocular health.
Cataract development is a known complication, but specific risk factors require further elucidation.
Understanding these factors is crucial for proactive eye care in diabetic populations.

Purpose:

To determine the prevalence of cataracts in individuals with type 1 diabetes.
To identify associated risk factors for cataract formation in this cohort.
To investigate the relationship between diabetic complications and cataract development.

Summary:

A case-control study involving 181 patients with type 1 diabetes evaluated cataract prevalence (19.9%).
Univariate analysis revealed significant associations between cataracts and diabetic retinopathy, peripheral neuropathy, elevated creatinine, panphotocoagulation, and hypertension.
Logistic regression confirmed diabetic retinopathy as a primary risk factor for cataract development.

Impact:

Identifies diabetic retinopathy as a major risk factor for cataracts in type 1 diabetes.
Provides crucial data for ophthalmologists and endocrinologists managing diabetic eye disease.
Informs targeted screening and intervention strategies to prevent vision loss in diabetic patients.