Loss of the Y chromosome PAR2 region and additional rearrangements in two familial cases of satellited Y chromosomes: Cytogenetic and molecular analysis

V. Velissariou, C. Sismani, S. Christopoulou, P. Kaminopetros, A. Hatzaki, P. Evangelidou, G. Koumbaris, C. S. Bartsocas, G. Stylianidou, N. Skordis, A. Diakoumakos, P. C. Patsalis

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10 Citations (Scopus)

Abstract

Two cases of rare structural aberrations of the Y chromosome were detected: a del(Y) (q12) chromosome in a child with mild dysmorphic features, obesity and psychomotor delay, and two identical satellited Y chromosomes (Yqs) in a normal twin, which were originally observed during routine prenatal diagnosis. In both cases a Yqs chromosome was detected in the father which had arisen from a reciprocal translocation involving the short arm of chromosome 15 and the heterochromatin of the long arm of the Y chromosome (Yqh). Cytogenetic and molecular studies demonstrated that in the reciprocal product of chromosomes 15 and Y PAR2 could not be detected, showing that PAR2 had been deleted. It is discussed whether the translocation of the short arm of an acrocentric chromosome to the heterochromatin of the long arm of the Y chromosome causes instability of this region which results either in loss of genetic material or interference with the normal mechanism of disjunction.

Original languageEnglish
Pages (from-to)291-300
Number of pages10
JournalEuropean Journal of Medical Genetics
Volume50
Issue number4
DOIs
Publication statusPublished - Jul 2007

Keywords

  • PAR2 pseudoautosomal region
  • Y chromosome satellited (Yqs)

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    Velissariou, V., Sismani, C., Christopoulou, S., Kaminopetros, P., Hatzaki, A., Evangelidou, P., Koumbaris, G., Bartsocas, C. S., Stylianidou, G., Skordis, N., Diakoumakos, A., & Patsalis, P. C. (2007). Loss of the Y chromosome PAR2 region and additional rearrangements in two familial cases of satellited Y chromosomes: Cytogenetic and molecular analysis. European Journal of Medical Genetics, 50(4), 291-300. https://doi.org/10.1016/j.ejmg.2007.04.004