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Ullrich-Turner syndrome: relevance of searching for Y chromosome fragments. 1999

D Damiani, and D R Guedes, and M Fellous, and S Barbaux, and K McElreavey, and J Kalil, and A C Goldberg, and C A Moreira-Filho, and A Barbosa, and T Della Manna, and V Dichtchekenian, and N Setian
Pediatric Endocrinology Unit, Instituto da Criança, Hospital das Clínicas, São Paulo University Medical School, Brazil.

Forty consecutive patients with Ullrich-Turner syndrome (UTS) were followed-up and investigated for the presence of Y chromosome fragments in their genomes. We used the polymerase chain reaction (PCR) to detect SRY (sex-determining region on the Y chromosome) and the sequence-tagged sites (STS) sY57, sY59, sY85, sY94, sY124 and sY157--which correspond to regions 3C (sY57 and 59), 5C, 5G, 5P, and 6F, respectively, of the Y chromosome--searching for Y fragments that could bear the putative locus (loci) for gonadoblastoma (GBY). It has been shown that the presence of GBY greatly increases the risk of dysgenic gonads to undergo malignant transformation. Among our 40 patients, we found Y-derived sequences--including SRY and the region spanning from sY57 to sY94--in two. These two patients had a marker chromosome detected by conventional cytogenetic analysis (45,X/46,X + mar). Their gonads were excised and found to be streaks. In one of the patients, we found foci of primitive sex cords (amidst the gonadal stroma), oviducts and Wolffian remnants. Fluorescence in situ hybridization (FISH) did not show Y chromosome material in her gonad-derived fibroblasts. The other girl had hyperplastic Leydig cells in the gonadal stroma, oviducts and Wolffian remnants, with signs of epididymal differentiation. PCR assays performed on DNA extracted from paraffin-embedded gonadal tissue were negative for SRY sequences in both patients. These findings show that all UTS patients should be examined for Y chromosome material, and that positive cases should have their dysgenic gonads excised due to the high risk of malignancy.

UI MeSH Term Description Entries
D007621 Karyotyping Mapping of the KARYOTYPE of a cell. Karyotype Analysis Methods,Analysis Method, Karyotype,Analysis Methods, Karyotype,Karyotype Analysis Method,Karyotypings,Method, Karyotype Analysis,Methods, Karyotype Analysis
D002875 Chromosomes In a prokaryotic cell or in the nucleus of a eukaryotic cell, a structure consisting of or containing DNA which carries the genetic information essential to the cell. (From Singleton & Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d ed) Chromosome
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D001483 Base Sequence The sequence of PURINES and PYRIMIDINES in nucleic acids and polynucleotides. It is also called nucleotide sequence. DNA Sequence,Nucleotide Sequence,RNA Sequence,DNA Sequences,Base Sequences,Nucleotide Sequences,RNA Sequences,Sequence, Base,Sequence, DNA,Sequence, Nucleotide,Sequence, RNA,Sequences, Base,Sequences, DNA,Sequences, Nucleotide,Sequences, RNA
D014424 Turner Syndrome A syndrome of defective gonadal development in phenotypic females associated with the karyotype 45,X (or 45,XO). Patients generally are of short stature with undifferentiated GONADS (streak gonads), SEXUAL INFANTILISM, HYPOGONADISM, webbing of the neck, cubitus valgus, elevated GONADOTROPINS, decreased ESTRADIOL level in blood, and CONGENITAL HEART DEFECTS. NOONAN SYNDROME (also called Pseudo-Turner Syndrome and Male Turner Syndrome) resembles this disorder; however, it occurs in males and females with a normal karyotype and is inherited as an autosomal dominant. Bonnevie-Ullrich Syndrome,Gonadal Dysgenesis, 45,X,Gonadal Dysgenesis, XO,Monosomy X,Status Bonnevie-Ullrich,Turner's Syndrome,Ullrich-Turner Syndrome,Bonnevie Ullrich Syndrome,Status Bonnevie Ullrich,Syndrome, Ullrich-Turner,Turners Syndrome,Ullrich Turner Syndrome,XO Gonadal Dysgenesis
D016133 Polymerase Chain Reaction In vitro method for producing large amounts of specific DNA or RNA fragments of defined length and sequence from small amounts of short oligonucleotide flanking sequences (primers). The essential steps include thermal denaturation of the double-stranded target molecules, annealing of the primers to their complementary sequences, and extension of the annealed primers by enzymatic synthesis with DNA polymerase. The reaction is efficient, specific, and extremely sensitive. Uses for the reaction include disease diagnosis, detection of difficult-to-isolate pathogens, mutation analysis, genetic testing, DNA sequencing, and analyzing evolutionary relationships. Anchored PCR,Inverse PCR,Nested PCR,PCR,Anchored Polymerase Chain Reaction,Inverse Polymerase Chain Reaction,Nested Polymerase Chain Reaction,PCR, Anchored,PCR, Inverse,PCR, Nested,Polymerase Chain Reactions,Reaction, Polymerase Chain,Reactions, Polymerase Chain
D016324 Sequence Tagged Sites Short tracts of DNA sequence that are used as landmarks in GENOME mapping. In most instances, 200 to 500 base pairs of sequence define a Sequence Tagged Site (STS) that is operationally unique in the human genome (i.e., can be specifically detected by the polymerase chain reaction in the presence of all other genomic sequences). The overwhelming advantage of STSs over mapping landmarks defined in other ways is that the means of testing for the presence of a particular STS can be completely described as information in a database. Sequence-Tagged Sites,Sequence Tagged Site,Sequence-Tagged Site,Site, Sequence Tagged,Site, Sequence-Tagged,Sites, Sequence Tagged,Sites, Sequence-Tagged,Tagged Site, Sequence,Tagged Sites, Sequence
D017931 DNA Primers Short sequences (generally about 10 base pairs) of DNA that are complementary to sequences of messenger RNA and allow reverse transcriptases to start copying the adjacent sequences of mRNA. Primers are used extensively in genetic and molecular biology techniques. DNA Primer,Oligodeoxyribonucleotide Primer,Oligodeoxyribonucleotide Primers,Oligonucleotide Primer,Oligonucleotide Primers,Primer, DNA,Primer, Oligodeoxyribonucleotide,Primer, Oligonucleotide,Primers, DNA,Primers, Oligodeoxyribonucleotide,Primers, Oligonucleotide

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