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A "balanced" Y;16 translocation associated with Turner-like neonatal lymphedema suggests the location of a potential anti-Turner gene on the Y chromosome

Identifieur interne : 00C759 ( Main/Exploration ); précédent : 00C758; suivant : 00C760

A "balanced" Y;16 translocation associated with Turner-like neonatal lymphedema suggests the location of a potential anti-Turner gene on the Y chromosome

Auteurs : R. P. Erickson [États-Unis] ; L. Hudgins [États-Unis] ; J. F. Stone ; S. Schmidt ; C. Wilke ; T. W. Glover

Source :

RBID : Pascal:95-0482507

Descripteurs français

English descriptors

Abstract

A male patient with Turner-like hydrops in the newborn period (Bonnevie-Ullrich syndrome) was studied. The karyotype was 46,X,t(Y ;16)(q11.2 ;q24) in 100 cells. Chromosome painting with the heterochromatic Y chromosome-specific long arm repeat DYZ2 disclosed that all the hybridization was on the derivative 16. This was confirmed by chromosome painting with DYZI, the other major Y long arm heterochromatic repeat, and DYZ3, the Y alphoid, centromeric repeat which showed chromosomal separation of the 2 stained regions. To further localize the breakpoint, FISH was performed using individual YACs from a Y-YAC contig (Foote et al., 1992). This disclosed two YACs (yOX111 and yOX123) which hybridized to both the Y and der16 chromosomes. The YACS spanning the translocation breakpoint region were located just proximal to the Y heterochromatin boundary. The recent discovery of a candidate gene for the azoospermia factor (AZF) in this region (Ma et al., 1993) suggests the possibility that there are several Y-expressed genes adjacent to the heterochromatin boundary (as there are near the pseudoautosomal boundary) which may include a gene involved with lymphedema which is disrupted by the translocation in this patient.


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Le document en format XML

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<term>Abnormal E16 chromosome</term>
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<term>Breakpoint</term>
<term>Chromosome translocation</term>
<term>Gonad</term>
<term>Human</term>
<term>Lymphedema</term>
<term>Newborn</term>
<term>Turner syndrome</term>
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<term>Translocation chromosomique</term>
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<term>Chromosome E16 anormal</term>
<term>Point cassure</term>
<term>Bonnevie Ulrich syndrome</term>
<term>Turner syndrome</term>
<term>Lymphoedème</term>
<term>Nouveau né</term>
<term>Gonade</term>
<term>Anomalie différenciation sexuelle</term>
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<div type="abstract" xml:lang="en">A male patient with Turner-like hydrops in the newborn period (Bonnevie-Ullrich syndrome) was studied. The karyotype was 46,X,t(Y ;16)(q11.2 ;q24) in 100 cells. Chromosome painting with the heterochromatic Y chromosome-specific long arm repeat DYZ2 disclosed that all the hybridization was on the derivative 16. This was confirmed by chromosome painting with DYZI, the other major Y long arm heterochromatic repeat, and DYZ3, the Y alphoid, centromeric repeat which showed chromosomal separation of the 2 stained regions. To further localize the breakpoint, FISH was performed using individual YACs from a Y-YAC contig (Foote et al., 1992). This disclosed two YACs (yOX111 and yOX123) which hybridized to both the Y and der16 chromosomes. The YACS spanning the translocation breakpoint region were located just proximal to the Y heterochromatin boundary. The recent discovery of a candidate gene for the azoospermia factor (AZF) in this region (Ma et al., 1993) suggests the possibility that there are several Y-expressed genes adjacent to the heterochromatin boundary (as there are near the pseudoautosomal boundary) which may include a gene involved with lymphedema which is disrupted by the translocation in this patient.</div>
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