Glucose counterregulation in Type 2 diabetes mellitus

Diabet Med. 2001 Jul;18(7):519-27. doi: 10.1046/j.1464-5491.2001.00610.x.

Abstract

Glucose counterregulatory failure and hypoglycaemia unawareness frequently complicate treatment of Type 1 diabetes mellitus, especially when aiming for intensive metabolic control. Since tight metabolic control reduces microvascular long-term complications in Type 2 diabetes mellitus, the integrity of glucose counterregulation in Type 2 diabetic patients is important. Using a Medline search, we identified 12 studies in which counterregulatory responses to insulin-induced hypoglycaemia were compared between Type 2 diabetic patients and appropriate controls. A review of these studies showed that some patients with Type 2 diabetes mellitus develop mild counterregulatory dysfunction and reduced awareness of insulin-induced hypoglycaemia. Some studies suggested an association between counterregulatory impairment and intensity of metabolic control. We speculate that the relatively low frequency of (severe) hypoglycaemic events in Type 2 diabetes may explain why glucose counterregulation remains unaffected in most patients. We hypothesize that residual beta-cell reserve and insulin resistance provide protection against severe hypoglycaemia and limit impaired counterregulation. Diabet. Med. 18, 519-527 (2001)

Publication types

  • Review

MeSH terms

  • Awareness
  • Blood Glucose / metabolism*
  • Diabetes Mellitus, Type 1 / blood
  • Diabetes Mellitus, Type 2 / blood*
  • Homeostasis
  • Humans
  • Hypoglycemia / physiopathology
  • Insulin / pharmacology

Substances

  • Blood Glucose
  • Insulin