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Related Experiment Videos

Type 1 1/2 diabetes: myth or reality?

R Juneja1, J P Palmer

  • 1Department of Veteran Affairs Puget Sound Health Care System, University of Washington, Endocrinology, Seattle 98108, USA. rjun@u.washington.edu

Autoimmunity
|March 3, 1999
PubMed
Summary

Type 1 1/2 diabetes presents like Type 2 diabetes but has autoimmune features of Type 1 diabetes. Diagnosis requires both clinical and biochemical criteria for effective insulin therapy.

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Area of Science:

  • Endocrinology
  • Immunology
  • Diabetology

Background:

  • Classical Type 1 diabetes (IDDM) is autoimmune, while Type 2 diabetes (NIDDM) involves insulin resistance.
  • Clinical distinctions between Type 1 and Type 2 diabetes are imperfect.
  • Type 1 1/2 diabetes exhibits features of both Type 1 and Type 2 diabetes.

Purpose of the Study:

  • To review the literature on Type 1 1/2 diabetes.
  • To discuss its clinical characteristics, natural history, and pathophysiology.
  • To emphasize the therapeutic implications of accurate diagnosis.

Main Methods:

  • Literature review of Type 1 1/2 diabetes.
  • Analysis of clinical and immunological features.
  • Discussion of diagnostic criteria and future research needs.

Main Results:

  • Type 1 1/2 diabetes shares clinical presentation with NIDDM but possesses IDDM-like immunological markers.
  • Accurate diagnosis is crucial for appropriate insulin therapy.
  • Current diagnostic methods are insufficient for precise classification.

Conclusions:

  • A combined approach using clinical and biochemical markers (ICA, GAD Ab, HLA typing, beta-cell function tests) is recommended for diagnosing Type 1 1/2 diabetes.
  • Further comparative studies are needed to understand its pathophysiology.
  • Animal models like Psammomys obesus may aid research.

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