We report on a combined high resolution cytogenetic and fluorescent in situ hybridization study (FISH) on 15 Prader-Willi syndrome (PWS) and 14 Angelman syndrome (AS) patients. High resolution banding showed a microdeletion in the 15q11-q13 region in 7 out of 15 PWS patients, and FISH analysis of the D15S11 and SNRPN cosmids demonstrated absence of the critical region in three additional cases. Likewise 8 out of 14 AS patients were found to be deleted with FISH, using the GABRB3 specific cosmid, whereas only 4 of them had a cytogenetically detectable deletion.
FISH analysis in Prader-Willi and Angelman syndrome patients / D. Bettio, N. Rizzi, D. Giardino, G. Grugni, V. Briscioli, A. Selicorni, F. Carnevale, L. Larizza. - In: AMERICAN JOURNAL OF MEDICAL GENETICS. - ISSN 0148-7299. - 56:2(1995 Mar 27), pp. 224-228. [10.1002/ajmg.1320560222]
FISH analysis in Prader-Willi and Angelman syndrome patients
L. LarizzaUltimo
1995-03-27
Abstract
We report on a combined high resolution cytogenetic and fluorescent in situ hybridization study (FISH) on 15 Prader-Willi syndrome (PWS) and 14 Angelman syndrome (AS) patients. High resolution banding showed a microdeletion in the 15q11-q13 region in 7 out of 15 PWS patients, and FISH analysis of the D15S11 and SNRPN cosmids demonstrated absence of the critical region in three additional cases. Likewise 8 out of 14 AS patients were found to be deleted with FISH, using the GABRB3 specific cosmid, whereas only 4 of them had a cytogenetically detectable deletion.
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