[Complete form of androgen insensitivity syndrome in Brazilian patients due to P766A mutation in the androgen receptor].
Androgen insensitivity syndrome (AIS) is a rare X-linked disorder, caused by mutations in the androgen receptor gene (AR), associated with a variety of phenotypes in 46,XY individuals. We studied two 23 year-old twin-sisters with female social sex referred due to primary amenorrhea, who exhibited bilateral palpable gonads in the inguinal region and a 46,XY karyotype. The uterus was absent in pelvic sonograms. Basal LH levels were elevated (35 and 42 U/L), with normal FSH (7.9 and 7.8 U/L) and high testosterone levels (1330 and 1660 ng/dl). The molecular analysis identified a missense mutation in exon 5 of AR gene that changed a proline to an alanine at position 766 of the protein. Proline 766 is a highly conserved amino acid in the AR of several species and is located in the androgen binding domain.
Laboratório de Hormônios e Genética Molecular, LIM-42, Universidade de São Paulo, HCFM, São Paulo, SP.
Rafaela V
RV
Corrêa
João C
JC
Wey
Ana E C
AE
Billerbeck
Karla F S
KF
Melo
Berenice B
BB
Mendonça
Marta V
MV
Wey
Ivo J P
IJ
Arnhold
D013734:Androgen-Insensitivity Syndrome / Q000235:genetics*; D001938:Brazil; D004200:Diseases in Twins / Q000235:genetics*; D005260:Female; D006801:Humans; D007621:Karyotyping; D008297:Male; D009154:Mutation; D011944:Receptors, Androgen / Q000235:genetics*
D011944:Receptors, Androgen