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Preimplantation genetic diagnosis (PGD) for SHOX-related haploinsufficiency in conjunction with trisomy 21 detection by molecular analysis.


ABSTRACT: PURPOSE: Development of a molecular PGD protocol for a male with an X-linked deletion in the SHOX gene region, located in the pseudoautosomal region of the X/Y chromosomes. Due to excessive recombination in this region, the deletion can be found in male offspring. METHODS: We developed a 13 marker multiplex fluorescent PCR protocol: 3 markers within the deleted SHOX region, 5 flanking markers, 3 informative markers on chromosome 21 (advanced maternal age) and 2 markers for sex determination. RESULTS: Of four embryos, two wild type males, diploid for chromosome 21 were transferred resulting in twin boys. One embryo was an affected female and another embryo was Turner. Amniocentesis confirmed the implanted embryos were males (46XY), with no recombinations. CONCLUSIONS: While many X-linked disorders can be analyzed by sexing, genes located in the pseudoautosomal regions have high XY recombination rates, requiring multiple markers to enable an accurate diagnosis.

SUBMITTER: Altarescu G 

PROVIDER: S-EPMC3082663 | biostudies-literature | 2011 Mar

REPOSITORIES: biostudies-literature

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Preimplantation genetic diagnosis (PGD) for SHOX-related haploinsufficiency in conjunction with trisomy 21 detection by molecular analysis.

Altarescu Gheona G   Reish Orit O   Renbaum Paul P   Kasterstein Ester E   Komarovsky Dvorah D   Komsky Alisa A   Bern Orna O   Strassburger Dvorah D   Levy-Lahad Ephrat E   Ron-El Raphael R  

Journal of assisted reproduction and genetics 20101201 3


<h4>Purpose</h4>Development of a molecular PGD protocol for a male with an X-linked deletion in the SHOX gene region, located in the pseudoautosomal region of the X/Y chromosomes. Due to excessive recombination in this region, the deletion can be found in male offspring.<h4>Methods</h4>We developed a 13 marker multiplex fluorescent PCR protocol: 3 markers within the deleted SHOX region, 5 flanking markers, 3 informative markers on chromosome 21 (advanced maternal age) and 2 markers for sex deter  ...[more]

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