Toll-like receptors and diabetes complications: recent advances

Sandra Rosa Ramirez1, Mohan Ravi Krishna Dasu

  • 1Department of Dermatology, U C Davis 3301 C Street, Sacramento CA 95816, USA.

Current Diabetes Reviews
|September 1, 2012
PubMed

Insights

Toll-like receptors (TLRs) drive inflammation, worsening diabetes mellitus (DM) complications like heart disease and kidney issues. This review examines TLRs

Area of Science:

  • Immunology
  • Endocrinology
  • Pathophysiology

Background:

  • Diabetes mellitus (DM) is a global health concern with rising prevalence and severe complications.
  • DM is linked to heart disease, nephropathy, neuropathy, and impaired wound healing.
  • Systemic inflammation, mediated by innate immune receptors, is implicated in DM pathogenesis.

Purpose of the Study:

  • To review the expression and activation of Toll-like receptors (TLRs) in diabetes.
  • To elucidate the role of TLRs in mediating inflammation in DM complications.
  • To consolidate existing knowledge on TLRs' detrimental effects on heart disease, nephropathy, neuropathy, and wound healing in DM.

Main Methods:

  • Literature review of in vitro and in vivo studies.
  • Analysis of TLR expression and activation pathways in diabetic models.
  • Synthesis of data on TLRs' impact on DM-related organ damage and healing.

Main Results:

  • TLRs are key innate immune receptors involved in inflammatory responses in DM.
  • Evidence suggests TLRs contribute to the pathogenesis of DM complications.
  • Specific TLRs and their signaling pathways are implicated in heart disease, nephropathy, neuropathy, and poor wound healing.

Conclusions:

  • TLRs play a significant role in the inflammatory processes underlying DM complications.
  • Targeting TLRs may offer a therapeutic strategy for managing DM-related conditions.
  • Further research is needed to fully understand and exploit the TLR pathway in diabetes treatment.

Related Concept Videos

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.
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...
Complications of Diabetes Mellitus01:22

Complications of Diabetes Mellitus

Diabetes mellitus is a chronic metabolic disorder characterized by persistent hyperglycemia due to insulin deficiency, resistance, or both. Prolonged hyperglycemia disrupts metabolic homeostasis and leads to acute and chronic complications.Acute ComplicationsAcute complications result from sudden metabolic imbalance.Diabetic ketoacidosis (DKA) mainly appears in type 1 diabetes but may also develop in type 2 diabetes, particularly under extreme stress. It arises from severe insulin deficiency,...
Type II Diabetes I: Introduction01:26

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...
Diabetes: Symptoms, Diagnosis, and Complications01:15

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 Retinopathy01:27

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...