Identification of Y-Chromosome Sequences in Turner Syndrome.

Abstract:

OBJECTIVES:To investigate the presence of Y-chromosome sequences and determine their frequency in patients with Turner syndrome. METHODS:The study included 23 patients with Turner syndrome from Brazil, who gave written informed consent for participating in the study. Cytogenetic analyses were performed in peripheral blood lymphocytes, with 100 metaphases per patient. Genomic DNA was also extracted from peripheral blood lymphocytes, and gene sequences DYZ1, DYZ3, ZFY and SRY were amplified by Polymerase Chain Reaction. RESULTS:The cytogenetic analysis showed a 45,X karyotype in 9 patients (39.2 %) and a mosaic pattern in 14 (60.8 %). In 8.7 % (2 out of 23) of the patients, Y-chromosome sequences were found. This prevalence is very similar to those reported previously. The initial karyotype analysis of these patients did not reveal Y-chromosome material, but they were found positive for Y-specific sequences in the lymphocyte DNA analysis. CONCLUSION:The PCR technique showed that 2 (8.7 %) of the patients with Turner syndrome had Y-chromosome sequences, both presenting marker chromosomes on cytogenetic analysis.

journal_name

Indian J Pediatr

authors

Silva-Grecco RL,Trovó-Marqui AB,Sousa TA,Croce LD,Balarin MA

doi

10.1007/s12098-015-1929-6

subject

Has Abstract

pub_date

2016-05-01 00:00:00

pages

405-9

issue

5

eissn

0019-5456

issn

0973-7693

pii

10.1007/s12098-015-1929-6

journal_volume

83

pub_type

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