Screening for Y-derived sex determining gene SRY in 40 patients with Turner syndrome
| Autor: | P Berta, R. Dumas, C. Sultan, J Medlej, J M Lobaccaro, J E Toublanc, J Weill, Bruno Leheup, C Belnon, C. Chevalier |
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| Rok vydání: | 1992 |
| Předmět: |
Male
Sex Determination Analysis medicine.medical_specialty Gonad Adolescent Endocrinology Diabetes and Metabolism Clinical Biochemistry Turner Syndrome Gonadoblastoma Biology Y chromosome Polymerase Chain Reaction Biochemistry law.invention Endocrinology law Y Chromosome Internal medicine Turner syndrome medicine Humans Genetic Testing Gene X chromosome Polymerase chain reaction Genetics business.industry Biochemistry (medical) DNA medicine.disease Testis determining factor medicine.anatomical_structure Genes Female business |
| Zdroj: | The Journal of Clinical Endocrinology & Metabolism. 75:1289-1292 |
| ISSN: | 1945-7197 0021-972X |
| DOI: | 10.1210/jcem.75.5.1430090 |
| Popis: | In Turner patients, the presence of a Y chromosome or derivative Y is correlated with the risk of gonadoblastoma induction. "Marker" chromosomes originating from Y, may not show characteristic fluorescence and then be very difficult to identify by conventional cytogenetic techniques, although they still predispose the patients to gonadal tumors. Using polymerase chain reaction of the gene from the sex-determining region of the Y chromosome, we screened 40 Turner patients (thirty seven 45X and three 45X,46XX) for the presence of Y chromosomal DNA. We were able to identify karyotypically unrecognized Y chromosome material in 1 patient out of the 40 studied. In this patient mild clinical and biological hyperandrogenism was observed. Reliability of our technique was ascertained by the detection of the expected 648 base pairs amplified DNA fragment in all normal male controls as well as in 3 Turner patients with confirmed 45X,46XY mosaicism. Despite the low frequency of unrecognized Y chromosome material (1 case over 40 in our experience), our data suggest that polymerase chain reaction of the gene from the sex-determining region of the Y chromosome is worthy of being performed in Turner patients considering the potential risk of the presence of a Y chromosome. |
| Databáze: | OpenAIRE |
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