Update on resistance to thyroid hormone syndromeβ

Area of Science:

• Endocrinology
• Genetics
• Molecular Biology

Background:

• Resistance to thyroid hormone syndrome (RTH) is a genetic disorder impacting thyroid hormone receptor genes (THR-α and THR-β).
• RTH due to THR-β gene mutations (RTH-β) presents with diminished target tissue response to thyroid hormone, elevated free triiodothyronine (FT3) and/or free thyroxine (FT4) levels, and abnormal thyroid-stimulating hormone (TSH) secretion.
• Clinical presentations of RTH-β range from hyperthyroidism to hypothyroidism or goiter, frequently leading to diagnostic challenges.

Purpose of the Study:

• To enhance understanding of RTH-β.
• To provide comprehensive knowledge on RTH-β to aid clinicians.
• To reduce the incidence of misdiagnosis for RTH-β.

Main Methods:

• Literature review on RTH-β genetics and clinical manifestations.
• Analysis of diagnostic criteria and challenges associated with RTH-β.
• Synthesis of current knowledge on thyroid hormone receptor mutations and their effects.

Main Results:

• RTH-β results from mutations in the THR-β gene, affecting thyroid hormone signaling.
• Key biochemical findings include elevated FT3/FT4 and normal/high TSH.
• Clinical heterogeneity complicates diagnosis, with symptoms mimicking other thyroid conditions.

Conclusions:

• Accurate diagnosis of RTH-β requires careful consideration of genetic, biochemical, and clinical data.
• Increased awareness and knowledge of RTH-β are essential for appropriate clinical management.
• Further research may elucidate the full spectrum of RTH-β and improve diagnostic accuracy.