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Defective counterregulation and hypoglycemia unawareness in diabetes: mechanisms and emerging treatments

Candace M Reno1, Marina Litvin, Amy L Clark

  • 1Division of Endocrinology, Metabolism & Lipid Research, Department of Medicine, Washington University, St Louis, MO 63110, USA.

Endocrinology and Metabolism Clinics of North America
|February 9, 2013
PubMed

Insights

Hypoglycemia limits glycemic control in diabetes. This review covers brain responses to low blood sugar, unawareness mechanisms in insulin-treated diabetes, and prevention strategies.

Area of Science:

  • Neuroscience
  • Endocrinology
  • Metabolic disorders

Background:

  • Hypoglycemia is a major challenge for glycemic control in diabetes.
  • The brain's role in sensing and responding to hypoglycemia is critical.
  • Hypoglycemia unawareness and impaired counterregulation affect individuals with insulin-treated diabetes.

Purpose of the Study:

  • To review recent advances in brain sensing and response to hypoglycemia.
  • To outline mechanisms of hypoglycemia unawareness and impaired counterregulation in diabetes.
  • To discuss strategies for preventing hypoglycemia.

Main Methods:

  • Literature review of recent scientific advances.
  • Analysis of neurobiological mechanisms.
  • Synthesis of clinical findings related to diabetes management.

Main Results:

  • The brain employs complex mechanisms to detect and respond to falling glucose levels.
  • Insulin therapy can lead to adaptations in the brain, causing hypoglycemia unawareness.
  • Counterregulatory hormone responses to hypoglycemia can become blunted over time.

Conclusions:

  • Understanding brain mechanisms is key to managing hypoglycemia in diabetes.
  • Targeting these mechanisms may improve glycemic control and patient safety.
  • Effective prevention strategies are crucial for individuals with diabetes.

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