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PRENATAL DIAGNOSIS OF X‐LINKED SPINAL AND BULBAR MUSCULAR ATROPHY IN A GREEK FAMILY
Author(s) -
YAPIJAKIS CHRISTOS,
KAPAKI ELISABETH,
BOUSSIOU MARINA,
VASSILOPOULOS DIMITRIS,
PAPAGEORGIOU CONSTANTINE
Publication year - 1996
Publication title -
prenatal diagnosis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.956
H-Index - 97
eISSN - 1097-0223
pISSN - 0197-3851
DOI - 10.1002/(sici)1097-0223(199603)16:3<262::aid-pd841>3.0.co;2-f
Subject(s) - spinal and bulbar muscular atrophy , x linked recessive inheritance , trinucleotide repeat expansion , prenatal diagnosis , allele , medicine , spinal muscular atrophy , androgen receptor , genetics , fetus , x chromosome , biology , pregnancy , disease , gene , prostate cancer , cancer
X‐linked spinal and bulbar muscular atrophy (SBMA) is a late‐onset motor neuron disorder which is caused by an expansion of the trinucleotide repeat (CAG) n in the first exon of the androgen receptor gene. Two cases of prenatal testing for the disease in a Greek family are reported. An affected male died in his late 50s of this disorder and his 30‐year‐old daughter (an obligate carrier) asked for prenatal testing for SBMA. DNA analysis revealed that she indeed carried an expanded allele of 40 repeats, as well as a normal size allele of 24 repeats. Prenatal diagnosis of SBMA was performed when, on two successive pregnancies, two male fetuses with the expanded (CAG) n allele were found.