Androgen resistance due to mutation of the androgen receptor

Area of Science:

• Molecular endocrinology
• Genetics
• Human physiology

Background:

• The androgen receptor (AR) is a key DNA-binding protein regulating gene expression in response to androgens.
• Mutations in the AR gene lead to a spectrum of androgen resistance disorders, affecting sexual development and reproductive health.
• Understanding AR function is crucial for diagnosing and managing conditions related to androgen insensitivity.

Purpose of the Study:

• To identify pathogenic alterations in the androgen receptor (AR) gene in families with androgen resistance.
• To correlate AR genotype with clinical phenotypes and receptor activity in patients.
• To contribute to a structure-function map of the AR and related steroid receptors.

Main Methods:

• Genetic analysis of the AR gene in 38 families with androgen resistance.
• Assessment of androgen-binding activity in genital skin fibroblasts.
• Correlation of identified AR gene mutations with clinical presentation and receptor phenotypes.

Main Results:

• Identified 32 pathogenic or putatively pathogenic alterations in the AR gene across 38 families.
• Most identified mutations were located within the AR's androgen-binding domain.
• Findings enable heterozygote detection and prenatal diagnosis for relevant family members.

Conclusions:

• Genetic variations in the androgen receptor (AR) gene are a primary cause of androgen resistance.
• Detailed genotype-phenotype correlations enhance understanding of AR function and its role in disease.
• This research facilitates improved diagnostic capabilities and genetic counseling for androgen resistance disorders.