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[Extreme insulin resistance type A]

M Kobayashi1

  • 1First Department of Medicine, Toyama Medical and Pharmaceutical University.

Nihon Rinsho. Japanese Journal of Clinical Medicine
|October 1, 1994
PubMed
Summary

Extreme insulin resistance Type A involves reduced insulin sensitivity and binding, often presenting with skin issues and PCOS. Receptor defects, like processing errors or increased degradation, cause this, though mutations don't always yield identical symptoms.

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Area of Science:

  • Endocrinology
  • Molecular Biology
  • Genetics

Context:

  • Extreme insulin resistance Type A is a rare syndrome characterized by severe insulin insensitivity.
  • Patients often exhibit clinical signs such as acanthosis nigricans, hirsutism, and polycystic ovary syndrome (PCOS).

Purpose:

  • To define Extreme insulin resistance Type A and elucidate the molecular mechanisms behind decreased insulin receptor binding.
  • To explore the relationship between insulin receptor mutations and phenotypic variability.

Summary:

  • Extreme insulin resistance Type A is linked to diminished insulin sensitivity and impaired insulin binding to its receptor.
  • Mechanisms include reduced receptor affinity, abnormal receptor biosynthesis (processing defects), and increased proreceptor degradation.
  • Phenotypic expression, including skin lesions and glucose intolerance, can vary even with identical insulin receptor mutations.

Impact:

  • Provides a comprehensive definition and mechanistic understanding of Extreme insulin resistance Type A.
  • Highlights the complex genotype-phenotype correlations in insulin receptor disorders.
  • Informs potential diagnostic and therapeutic strategies for severe insulin resistance syndromes.

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