Y-Chromosome Detection in Turner Syndrome
نویسندگان
چکیده
Turner syndrome is a chromosomal disorder characterized by the presence of a single normal X chromosome in women. Additionally to the X chromosome monosomy, other cell lines can co-exist, containing the Y chromosome or part of it. The presence of Y chromosome in patients with Turner syndrome represents an increased risk (1530%) of developing gonadoblastoma. In this study we screened for the absence/presence of four genes mapped on Y chromosome (SRY, TSPY, DDX3Y and HSFY) in 98 female samples obtained from different tissues, namely peripheral blood, amniotic fluid, gonadal tissue and miscarriages samples, previously characterized cytogenetically having at least one cell line with monosomy X or an abnormal X chromosome. We also evaluate the importance of a molecular test for detection of Y chromosome sequences using a combination of conventional cytogenetic methods and DNA analysis. Three miscarriages and one gonadal tissue presented Y-chromosome DNA sequences out of the 98 studied samples. We have discussed the higher frequency of the Y sequences in spontaneous abortions with 45, X karyotype and we have advised the detection of Y-chromosome material in Turner patients in order to improve the clinical orientation and the consequent prognosis.
منابع مشابه
Comparison of classical cytogenetics versus interphase FISH in diagnosis of mosaic form of Turner syndrome
Abstract Background: Mosaic form of turner syndrome that represented by two or more cell lines in an affected individual, often has limitation for detection with classical cytogenetic methods. The present study was carried out to compare the efficiency of interphase Fluorescence In Situ Hybridisation (FISH) and cytogenetic techniques in detection of mosaic form of turner syndrome. Method...
متن کاملTurner Syndrome: A Unique Mosaic Case with 45,X/47,XX,+21/46,XX Cell Lines
We report an extremely rare case of Turner syndrome mosaicism in a 30-year-old woman. At least 100 metaphases were observed and analyzed through GTG banding with over 550 band resolutions observed. G-banded chromosome analysis revealed a mosaic female karyotype involving 3 different cell lines. One cell line (90% of the analyzed metaphases) presented monosomy X, while 6% of the cells showed tri...
متن کاملDextrocardia and Hiatal Hernia in a Patient with Turner Syndrome
Turner syndrome is a sex-chromosome disorder occurring in one out of 2500 female births and characterized by growth retardation, gonadal dysgenesis and cardiovascular anomalies. The 45, XO karyotype is the most frequent type of this disease. Herein, we report on a 6-year-old girl with Turner syndrome and 45, XO karyotype presenting with short stature. She had dextrocardia and hiatal hernia. To ...
متن کاملEffects of Karyotype Variations on Phenotype of Patients with Turner Syndrome
Background: Turner syndrome (TS) is a sporadic disorder caused by the absence of all or some parts one X-chromosome with major developmental consequences such as short stature and ovarian failure etc. The minor manifestations of TS are cubitus valgus, micrognatism, high-arched palate, short and/or webbed neck, hypothyroidism, etc. Different karyotype abnormalities may lead to different clinical...
متن کاملY cell line in a turner mosaic: a case report
Turner Syndrome is one of the most common chromosomal aneuploidy seen in humans with an incidence of about 1: 2500 newborn females. Approximately 60% patients with Turner syndrome have 45, X karyotype while others show X chromosome abnormalities like deletions of long arm or short arm, isochromosome or ring chromosome. About 6-9% cases also show presence of Y chromosome or Y derived sequences. ...
متن کامل