Source:http://linkedlifedata.com/resource/pubmed/id/18854511
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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
11
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pubmed:dateCreated |
2008-12-10
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pubmed:abstractText |
The presence of an isochromosome Xq in Klinefelter syndrome (KS) is an apparently rare condition. In all cases reported so far, patients showed the classic phenotype. We here describe a case of isochromosome Xq [47,X,i(Xq),Y] in a non-mosaic KS patient. The patient exhibited a normal androgenized phenotype, normal testes and normal cognitive abilities. Semen analysis revealed a medium oligozoospermia (5 x 10(6) spermatozoa/ml). After the patient underwent intracytoplasmic sperm injection, he generated two cytogenetically healthy normal females. Fluorescence in situ hybridization analysis showed the presence of a dicentric Xq chromosome that did not show the presence of residual Xp arm up to the 57,820,478 bp position (Xp 1.1) of X chromosome sequence. Preferential inactivation of Xq isochromosome was demonstrated by bromodeoxyuridine replication analysis and transcriptional silencing by DNA methylation at the HUMARA locus. Furthermore, we demonstrated by quantitative RT-PCR an active XIST RNA expression in blood lymphocytes from Klinefelter patients, comparable to that observed in control females and over 30,000-fold greater than in control males. In conclusion, this qRT-PCR approach could be useful for screening of prepuberty males and for diagnosis or exclusion of cryptic Klinefelter mosaics.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical | |
pubmed:status |
MEDLINE
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pubmed:month |
Nov
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pubmed:issn |
1460-2407
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pubmed:author | |
pubmed:issnType |
Electronic
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pubmed:volume |
14
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
635-40
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pubmed:meshHeading |
pubmed-meshheading:18854511-Adult,
pubmed-meshheading:18854511-Chromosomes, Human, X,
pubmed-meshheading:18854511-Female,
pubmed-meshheading:18854511-Fertility,
pubmed-meshheading:18854511-Gene Expression Regulation,
pubmed-meshheading:18854511-Humans,
pubmed-meshheading:18854511-Klinefelter Syndrome,
pubmed-meshheading:18854511-Male,
pubmed-meshheading:18854511-Oligospermia,
pubmed-meshheading:18854511-RNA, Untranslated,
pubmed-meshheading:18854511-Reverse Transcriptase Polymerase Chain Reaction
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pubmed:year |
2008
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pubmed:articleTitle |
Fertility in a i(Xq) Klinefelter patient: importance of XIST expression level determined by qRT-PCR in ruling out Klinefelter cryptic mosaicism as cause of oligozoospermia.
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pubmed:affiliation |
Medical Genetic Department, ASL Cardarelli, Napoli, Italy.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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