Reproductive endocrinology

Small Indels in the Androgen Receptor Gene: Phenotype Implications and Mechanisms of Mutagenesis

J Clin Endocrinol MetabPublished Systematic review

Authors' conclusion

Our findings underscore a robust genotype-phenotype relationship regarding small indels in the AR gene in AIS, with a vast majority presenting complete AIS. Triplet regions and homopolymeric runs emerged as prone loci for small indels within the AR. Most were frameshift indels, with polymerase slippage potentially explaining half of AR indel occurrences. Complex frameshift indels exhibited association with palindromic runs. These discoveries advance understanding of the genetic basis of AIS and shed light on potential mechanisms underlying pathogenic small indel events.

Study context

Population
Individuals with androgen insensitivity syndrome (AIS) with small indels in the androgen receptor (AR) gene coding regionindels incl
Participants
82 individuals
Comparison
AR coding-region small indels in AIS vs population controls
  • AISn = 82
Outcome
Distribution, phenotype and mechanisms of AR small indels
Methodological detailsincludes 3 novel indels, comparison with genomic population data
  • Includes 3 novel indels
  • Comparison with genomic population data

Pooled result

As reported in the abstract

Small deletions

59.7%

Indels within triplet regions (most in nonrepetitive sequences)

15.8%

Original publication

Small Indels in the Androgen Receptor Gene: Phenotype Implications and Mechanisms of Mutagenesis. J Clin Endocrinol Metab. Published 12 August 2023. doi:10.1210/clinem/dgad470

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