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Velocardiofacial/DiGeorge syndrome (VCFS/DGS) is a developmental disorder caused by a 1.5 to 3-Mb hemizygous 22q11.2 deletion. VCFS/DGS patients display malformations in multiple systems, as well as an increased frequency of neuropsychiatric defects including schizophrenia. Haploinsufficiency of TBX1 appears to be responsible for these physical malformations in humans and mice, but the genes responsible...
The velo-cardio-facial syndrome (VCFS)/DiGeorge syndrome (DGS) is a genetic disorder characterized by phenotypic abnormalities of the derivatives of the pharyngeal arches, including cardiac outflow tract defects. Neural crest cells play a major role in the development of the pharyngeal arches, and defects in these cells are likely responsible for the syndrome. Most patients are hemizygous for a 1...
Velo-cardio-facial syndrome (VCFS)/DiGeorge syndrome (DGS) is a human disorder characterized by a number of phenotypic features including cardiovascular defects. Most VCFS/DGS patients are hemizygous for a 1.5-3.0 Mb region of 22q11. To investigate the etiology of this disorder, we used a cre-loxP strategy to generate mice that are hemizygous for a 1.5 Mb deletion corresponding to that on 22q11. These...
Cytogenetic studies of banded chromosomes and fluorescencein situhybridization (FISH) of several yeast artificial chromosomes (YACs) that are part of a 128-kb resolution physical map of a portion of 12q13 revealed that 4/14 (28%) lipomas have breakpoints in 12q13. These breakpoints are more than 10 Mb away from theHMGICgene at 12q14–q15, which is known to be modified in some lipomas. FISH with individual...
The distal part of 11q13, which contains several genes relevant to human diseases, has been poorly mapped as part of genome-wide mapping efforts. In the prospect of drawing a fine-scale integrated map of the area containingKRN1andOMP,we have established a framework of markers by hybridization to DNA of somatic cell hybrids and by fluorescencein situhybridization (FISH) on metaphase chromosomes. The...
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