Rare PTH Gene Mutations Causing Parathyroid Disorders: A Review

Area of Science:

• Endocrinology
• Molecular Biology
• Genetics

Background:

• Parathyroid hormone (PTH) plays a crucial role in calcium homeostasis.
• Since the isolation and sequencing of the PTH gene, only eight distinct mutations have been identified.

Purpose of the Study:

• To review and summarize the known mutations in the human PTH gene.
• To discuss the impact of these mutations on parathyroid cell function and associated diseases.
• To highlight the importance of ongoing mutation discovery for understanding PTH's role.

Main Methods:

• Literature review of reported PTH gene mutations.
• Analysis of mutation characteristics, including inheritance patterns and associated clinical phenotypes.
• Review of molecular mechanisms underlying the effects of identified mutations.

Main Results:

• Eight PTH gene mutations have been reported, including C18R, an exon-skipping mutation, S23P, S23X, R83X, p.Met1_Asp6del, R56C, and M14K.
• These mutations are associated with various conditions, including hypoparathyroidism and hyperparathyroidism.
• Specific mutations induce endoplasmic reticulum stress, apoptosis, or prevent translation initiation, impacting PTH function.

Conclusions:

• The identified PTH mutations provide valuable insights into PTH gene function and the molecular basis of related disorders.
• Further discovery of PTH mutations is essential for a more sophisticated understanding of PTH's physiological roles and pathological implications.