Insulin receptors in the kidneys in health and disease

Area of Science:

• Endocrinology
• Nephrology
• Metabolic Research

Background:

• Insulin regulates metabolic processes, and impaired insulin action causes insulin resistance.
• Insulin receptor (IR) function is well-studied in metabolic tissues but less understood in the kidney.
• The kidney's role in insulin sensitivity and the development of renal insulin resistance is under investigation.

Purpose of the Study:

• To review the significance of the renal insulin receptor (IR) in normal and insulin-resistant states.
• To consolidate findings on IR expression and function within the kidney nephron.

Main Methods:

• Literature review of studies investigating renal IR expression and function.
• Analysis of data from studies using targeted deletion of IR in kidney epithelial cells.
• Examination of research on altered renal and systemic metabolism in relevant mouse models.

Main Results:

• Insulin receptors (IRs) are widely distributed throughout kidney nephron segments.
• Reduced IR expression is observed in states of insulin resistance.
• Targeted deletion of IR in kidney epithelial cells leads to altered renal and systemic metabolism.

Conclusions:

• The kidney is a significant target tissue for insulin.
• Evidence supports the development of insulin resistance in the kidney.
• Renal IR plays a crucial role in maintaining normal kidney and systemic metabolism.