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Sci Rep ; 9(1): 9654, 2019 08 20.
Artigo em Inglês | MEDLINE | ID: mdl-31427585

RESUMO

This study aims to analyze the length polymorphisms in sequence-tagged-site (STS) sY1291 of the Y chromosome in Vietnamese men of infertile couples. All 322 DNA samples were amplified with the sY1291 primer by the quantitative fluorescent polymerase chain reaction (QF-PCR) assay. DNA sequencing technique was employed to evaluate the accuracy of QF-PCR results. The study showed 273 out of 322 DNA samples had the presence of STS sY1291, accounted for 84.78%. The QF-PCR results showed that there were various lengths in STS sY1291: 507 bp, 512 bp, 523 bp and 527 bp. The most prevalent length in STS sY1291 was 507 bp (87.5%), the others were 512 bp (4.8%), 523 bp (4.8%) and 527 bp (2.9%). We found that the observed length polymorphisms derived from differences in the number of mononucleotide Thymine (T) repeats in its structure. It stretched from 22 T to 39 T. DNA sequencing results identified that the number of mononucleotide T repeats causes these polymorphisms. However, the pair-wise alignment between the obtained and reference sequence was 77%. It can be seen that the length polymorphisms in STS sY1291 observed in QF-PCR results was accurate but it is still difficult to sequence fragments with mononucleotide repeats.


Assuntos
Azoospermia/epidemiologia , Azoospermia/genética , Cromossomos Humanos Y/genética , Oligospermia/epidemiologia , Oligospermia/genética , Polimorfismo Genético , Sitios de Sequências Rotuladas , Adolescente , Adulto , Sequência de Bases , Humanos , Masculino , Repetições de Microssatélites/genética , Pessoa de Meia-Idade , Reação em Cadeia da Polimerase/métodos , Aberrações dos Cromossomos Sexuais , Timina , Vietnã/epidemiologia , Adulto Jovem
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