DIFFERNTIAL DIAGNOSIS OF DELETION AND UNIPARENTAL DISOMY IN 15Q11.2-Q13 LOCUS

Reciprocal uniparental disomy in yeast.

In the diploid cells of most organisms, including humans, each chromosome is usually distinguishable from its partner homolog by multiple single-nucleotide polymorphisms. One common type of genetic alteration observed in tumor cells is uniparental disomy (UPD), in which a pair of homologous chromosomes are derived from a single parent, resulting in loss of heterozygosity for all single-nucleoti...

Uniparental disomy and prenatal phenotype

RATIONALE Uniparental disomy (UPD) gives a description of the inheritance of both homologues of a chromosome pair from the same parent. The consequences of UPD depend on the specific chromosome/segment involved and its parental origin. PATIENT CONCERNS We report prenatal phenotypes of 2 rare cases of UPD. DIAGNOSES The prenatal phenotype of case 1 included sonographic markers such as enlarg...

Complex and segmental uniparental disomy updated.

OBJECTIVE To review all cases with segmental and/or complex uniparental disomy (UPD) and to discuss the impact of these cases on medical genetics. DESIGN Searching for published reports in PubMed and in the abstract books of the annual meetings of the American Society of Human Genetics and the European Society of Human Genetics up to March 2008. RESULTS In total, 26 cases with segmental UPD...

Maternal Uniparental Disomy of Human Chromosome 7

Paternal uniparental disomy 14 and related disorders

Although recent studies in patients with paternal uniparental disomy 14 [upd(14)pat] and other conditions affecting the chromosome 14q32.2 imprinted region have successfully identified underlying epigenetic factors involved in the development of upd(14)pat phenotype, several matters, including regulatory mechanism(s) for RTL1 expression, imprinting status of DIO3 and placental histological char...