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Related Experiment Videos

Androgen insensitivity.

B Gottlieb1, L Pinsky, L K Beitel

  • 1Lady Davis Institute for Medical Research, Sir Mortimer B. Davis-Jewish General Hospital, 3755 Cote Ste. Catherine Road, Montreal, Quebec, Canada H3T 2E1.

American Journal of Medical Genetics
|March 23, 2000
PubMed
Summary
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Androgen receptor (AR) gene mutations cause androgen insensitivity syndromes, affecting virilization and fertility. Variability in AR-interactive proteins influences disease severity and treatment outcomes.

Area of Science:

  • Genetics
  • Molecular Biology
  • Endocrinology

Background:

  • The androgen receptor (AR) protein controls gene transcription via its DNA-binding and androgen-binding domains (ABD).
  • Interactions between AR domains and coregulatory proteins are crucial for regulating gene transcription rates.
  • Mutations in the AR gene lead to a spectrum of androgen insensitivity conditions with varying clinical manifestations.

Purpose of the Study:

  • To explore the relationship between AR gene mutations, AR-interactive proteins, and the phenotypic variability observed in androgen insensitivity.
  • To investigate the functional consequences of specific AR mutations, particularly within the ABD.
  • To evaluate the potential of pharmacotherapy in managing androgen insensitivity syndromes.

Main Methods:

Related Experiment Videos

  • Analysis of AR gene mutations, including N-terminal polyglutamine tract expansion and ABD mutations.
  • Examination of AR domain interactions and their impact on transactivation.
  • Review of clinical data and family histories to correlate genotype with phenotype.
  • Assessment of therapeutic interventions, including steroid pharmacotherapy.

    • Main Results:

    • AR mutations can cause complete, partial, or mild androgen insensitivity, with severity influenced by mutation type and location.
    • N-terminal polyglutamine tract expansion impairs AR transactivation, leading to mild androgen insensitivity.
    • Variability in AR-interactive proteins may explain the diverse expressivity of AR mutations among individuals.
    • Pharmacotherapy with androgens or steroids shows limited success in overcoming mutant AR dysfunction.

    Conclusions:

    • AR gene mutations are the primary cause of androgen insensitivity, with diverse clinical outcomes.
    • Understanding AR domain interactions and the role of coregulatory proteins is key to deciphering disease mechanisms.
    • Current pharmacotherapy options for androgen insensitivity are generally disappointing, highlighting the need for improved therapeutic strategies.