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Related Experiment Videos

Thyroid hormone generalized resistance.

C Jaffiol1, F de Boisvilliers, L Baldet

  • 1Service d'Endocrinologie, Hôpital Lapeyronie, Montpellier, France.

Hormone Research
|January 1, 1992
PubMed
Summary
This summary is machine-generated.

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Generalized thyroid hormone resistance is an inherited disorder causing goiter and abnormal thyroid hormone levels. Diagnosis can be challenging, but specific tests and treatment with high-dose thyroid hormones can help manage this condition.

Area of Science:

  • Endocrinology
  • Genetics
  • Molecular Biology

Background:

  • Thyroid hormone resistance (TR) syndromes can be generalized or tissue-specific.
  • Generalized resistance involves familial goiter, elevated free thyroid hormones, and normal/high TSH, often misdiagnosed.
  • Affected children may exhibit developmental issues like mental retardation, deafness, short stature, and delayed bone age.

Purpose of the Study:

  • To elucidate the characteristics and diagnostic approaches for generalized thyroid hormone resistance.
  • To explore the molecular basis of generalized thyroid hormone resistance.
  • To outline therapeutic strategies for generalized thyroid hormone resistance.

Main Methods:

  • Utilized in vivo and in vitro diagnostic tests.

Related Experiment Videos

  • Assessed the defect in sex hormone-binding globulin increment after T3 administration.
  • Investigated potential genetic abnormalities at the T3 receptor and c-erb A gene levels.

    • Main Results:

    • Identified familial eumetabolic or hypometabolic goiter with increased free thyroid hormones and normal/elevated TSH.
    • Demonstrated the utility of T3 administration to reveal defects in sex hormone-binding globulin.
    • Linked generalized TR to mutations or deletions in the T3 receptor and c-erb A gene's hormone-binding domain.

    Conclusions:

    • Generalized thyroid hormone resistance is an inherited condition with distinct clinical and biochemical features.
    • Diagnostic evaluation involves specialized in vivo and in vitro tests.
    • Therapy involves high-dose thyroid hormone replacement (T4 or T3) for hypometabolic patients.
    • The molecular basis involves abnormalities in the T3 receptor and c-erb A gene.