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- W61834523 abstract "To investigate deletions in the elastin gene in patients with Williams Syndrome (WS), we screened 37 patients and their parents for deletions in the elastin gene by both fluorescence in situ hybridization (FISH) using cosmid cELN272 containing the 5{prime} end of the elastin gene and by polymerase chain reaction (PCR) using a primer pair which amplifies intron 17 in the elastin gene, producing a polymorphic amplification product. Thirty-two patients have been investigated by both the FISH and PCR techniques, one patient was studied only by PCR, and 4 patients were studied only by FISH. Overall, 34 of 37 patients (92%) were deleted for the elastin gene. Using the PCR marker, 14 patients were informative and 12 were shown to be deleted [maternal (n=5) and paternal (n=7)]. Using cosmid cELN272, 33 of 36 patients demonstrated a deletion of chromosome 7q11.23. In one family, both the mother and daughter were deleted due to an apparently de novo deletion arising in the mother. Three patients were not deleted using the elastin cosmid; 2 of these patients have classic WS. Another non-deleted patient has the typical facial features and hypercalcemia but normal intelligence. These three patients will be important in delineating the critical region(s)more » responsible for the facial features, hypercalcemia, mental retardation and supravalvular aortic stenosis (SVAS). There was not an absolute correlation between deletions in elastin and SVAS, although these individuals may be at risk for other cardiovascular complications such as hypertention. Since the majority of WS patients are deleted for a portion of the elastin gene, most likely this marker will be an important diagnostic tool, although more patients will need to be studied. Those patients who are not deleted but clinically have WS will be missed using only this one marker. Expansion of the critical region to other loci and identification of additional markers will be essential for identifying all patients with WS.« less" @default.
- W61834523 created "2016-06-24" @default.
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- W61834523 date "1994-09-01" @default.
- W61834523 modified "2023-09-24" @default.
- W61834523 title "Deletions of the elastin gene in Williams Syndrome" @default.
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