scholarly journals Maternal Uniparental Disomy for Chromosome 14

1996 ◽  
Vol 45 (1-2) ◽  
pp. 169-172 ◽  
Author(s):  
D.A. Coviello ◽  
E. Panucci ◽  
M.M. Mantero ◽  
C. Perfumo ◽  
M. Guelfi ◽  
...  
Keyword(s):  
Robertsonian Translocation ◽  
De Novo ◽  
Clinical Phenotype ◽  
Uniparental Disomy ◽  
Chromosome 14 ◽  
Motor Delay ◽  
Maternal Uniparental Disomy ◽  
Severe Scoliosis ◽  
Severe Hypotonia

AbstractA girl carrying a de novo balanced 13-14 robertsonian translocation showed a clinical phenotype with severe hypotonia, hyperextensible joints, frontal bossing, asymmetric face, no mental retardation, severe scoliosis and motor delay. In situ hybridization analysis on chromosome spreads revealed the presence of the two centromeres in the rearranged chromosomes. Molecular analysis on genomic DNA showed the presence in the proposita of two chromosomes 14 of maternal origin and no chromosome 14 from the father indicating a maternal monocentric uniparental disomy for chromosome 14 (mUPD14). Our patient shows several similarities with other reported cases of mUPD14, suggesting imprinting of a region(s) of chromosome 14 and defining a possible mUPD14 Syndrome.

A Case of Angelman Syndrome Arising as a Result of a De Novo Robertsonian Translocation

1996 ◽  
Vol 45 (1-2) ◽  
pp. 255-261 ◽  
Author(s):  
S. Ramsden ◽  
L. Gaunt ◽  
A. Seres-Santamaria ◽  
J. Clayton-Smith
Keyword(s):  
Angelman Syndrome ◽  
Robertsonian Translocation ◽  
De Novo ◽  
Uniparental Disomy ◽  
Male Child ◽  
Paternal Uniparental Disomy

AbstractA male child has been identified with Angelman syndrome. He has been shown to carry a de novo Robertsonian 15/15 translocation where both chromosome 15s have been derived from the father. Consequently the disease in this instance is due to paternal uniparental disomy.

scholarly journals Mice Lacking Paternally Expressed Pref-1/Dlk1 Display Growth Retardation and Accelerated Adiposity

2002 ◽  
Vol 22 (15) ◽  
pp. 5585-5592 ◽  
Author(s):  
Yang Soo Moon ◽  
Cynthia M. Smas ◽  
Kichoon Lee ◽  
Josep A. Villena ◽  
Kee-Hong Kim ◽  
...  
Keyword(s):  
Human Chromosome ◽  
Growth Retardation ◽  
Uniparental Disomy ◽  
Chromosome 14 ◽  
Tissue Mass ◽  
Imprinted Gene ◽  
Maternal Uniparental Disomy ◽  
Skeletal Malformation

ABSTRACT Preadipocyte factor 1 (Pref-1/Dlk1) inhibits in vitro adipocyte differentiation and has been recently reported to be a paternally expressed imprinted gene at human chromosome 14q32. Studies on human chromosome 14 deletions and maternal uniparental disomy (mUPD) 14 suggest that misexpression of a yet-to-be-identified imprinted gene or genes present on chromosome 14 causes congenital disorders. We generated Pref-1 knockout mice to assess the role of Pref-1 in growth and in vivo adipogenesis and to determine the contribution of Pref-1 in mUPD. Pref-1-null mice display growth retardation, obesity, blepharophimosis, skeletal malformation, and increased serum lipid metabolites. Furthermore, the phenotypes observed in Pref-1-null mice are present in heterozygotes that harbor a paternally inherited, but not in those with a maternally inherited pref-1-null allele. Our results demonstrate that Pref-1 is indeed paternally expressed and is important for normal development and for homeostasis of adipose tissue mass. We also suggest that Pref-1 is responsible for most of the symptoms observed in mouse mUPD12 and human mUPD14. Pref-1-null mice may be a model for obesity and other pathologies of human mUPD14.

scholarly journals Maternal Uniparental Disomy 14 (Temple Syndrome) as a Result of a Robertsonian Translocation

2017 ◽  
Vol 8 (3) ◽  
pp. 131-138 ◽  
Author(s):  
Veronica Bertini ◽  
Antonella Fogli ◽  
Rossella Bruno ◽  
Alessia Azzarà ◽  
Angela Michelucci ◽  
...  
Keyword(s):  
Robertsonian Translocation ◽  
Uniparental Disomy ◽  
Maternal Uniparental Disomy ◽  
Temple Syndrome ◽  
Maternal Uniparental Disomy 14 ◽  
Uniparental Disomy 14

Low-Level Trisomy 14 Mosaicism: A Carrier of an Isochromosome 14 and a Supernumerary Marker Chromosome 14

2020 ◽  
pp. 1-7
Author(s):  
Voula Velissariou ◽  
Francis Sachinidi ◽  
Stavroula Christopoulou ◽  
Lina Florentin ◽  
Thomas Liehr ◽  
...  
Keyword(s):  
Cell Lines ◽  
De Novo ◽  
Marker Chromosome ◽  
Uniparental Disomy ◽  
Chorionic Villus ◽  
Copy Number Variations ◽  
Oligonucleotide Array ◽  
Chorionic Villus Sampling ◽  
Chromosome 14 ◽  
Different Tissues

Trisomy 14 (T14) mosaicism is a rare chromosomal condition characterised by various clinical features, including developmental delay, growth impairment, and dysmorphism. Here, we report on a 12-year-old female referred for cytogenetic analysis due to short stature. Standard GTG-banding analysis on the patient’s peripheral blood revealed mosaic Τ14 in the form of an i(14)(q10) in 3% of cells. Furthermore, a small supernumerary marker chromosome (sSMC) had been detected in the first trimester of pregnancy in chorionic villus sampling. A skin biopsy in the patient revealed the presence of a metacentric sSMC in 100% of cells. Cytogenetic and FISH studies showed that it was a de novo metacentric bisatellited sSMC derived from chromosomes 14 or 22. Oligonucleotide array-CGH using skin cells revealed no copy number variations. Studies for uniparental disomy 14 by microsatellite analysis confirmed biparental inheritance. To the best of our knowledge, this is the second report of a patient with 2 abnormal cell lines involving chromosome 14 in different tissues, one with mosaic T14 in the form of i(14)(q10) and one with an sSMC derived from chromosome 14, present in blood and skin, respectively. A rare mechanism of trisomy rescue events is proposed to explain the presence of the different cell lines in the tissues examined. This case highlights the importance of providing the cytogenetics laboratory with adequate clinical data to test for low mosaicism and analyse different tissues if necessary, thus contributing to the suitable clinical management of the patient.

Chromosome 14 maternal uniparental disomy in the euploid cell line of a fetus with mosaic 46,XX/47,XX,+14 karyotype

1994 ◽  
Vol 94 (4) ◽  
pp. 355-358 ◽  
Author(s):  
Silvia Maria Sirchia ◽  
Chiara De Andreis ◽  
Sara Pariani ◽  
Maria Grazia Grimoldi ◽  
Anna Molinari ◽  
...  
Keyword(s):  
Cell Line ◽  
Uniparental Disomy ◽  
Chromosome 14 ◽  
Maternal Uniparental Disomy
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