Genetic disorders of thyroid development, hormone biosynthesis and signalling

Area of Science:

• Endocrinology
• Genetics
• Molecular Biology

Background:

• Thyroid hormone (TH) biosynthesis and action are regulated by specific transcription factors and nuclear receptors.
• Membrane transporters and deiodinase enzymes are critical for TH metabolism and cellular uptake.
• Congenital hypothyroidism (CH) can result from thyroid dysgenesis or hormone synthesis defects (dyshormonogenesis).

Purpose of the Study:

• To review the genetic basis, pathogenesis, and clinical features of congenital hypothyroidism.
• To explore disorders related to thyroid hormone transport, metabolism, and action.
• To provide a comprehensive overview of genetic factors influencing thyroid hormone signaling.

Main Methods:

• Literature review of genetic defects in thyroid development and function.
• Analysis of gene mutations affecting thyroid transcription factors, hormone synthesis, and TH signaling pathways.
• Synthesis of information on clinical presentations of various thyroid disorders.

Main Results:

• Identified genetic defects in transcription factors, thyroid stimulating hormone receptor, and hormone synthesis pathways causing CH.
• Highlighted the role of genetic variations in TH transporters, deiodinases, and thyroid hormone receptors (TRα, TRβ) in TH signaling disorders.
• Detailed the clinical manifestations associated with genetic causes of hypothyroidism and TH resistance.

Conclusions:

• Genetic factors play a pivotal role in the etiology of congenital hypothyroidism and related disorders.
• Understanding the genetic underpinnings is essential for accurate diagnosis and therapeutic strategies.
• Further research into TH transport, metabolism, and action mechanisms will improve patient outcomes.