Artículos de revistas
Atypical copy number abnormalities in 22q11.2 region: Report of three cases
Registro en:
European Journal Of Medical Genetics. Elsevier Science Bv, v. 56, n. 9, n. 515, n. 520, 2013.
1769-7212
WOS:000324894100009
10.1016/j.ejmg.2013.07.002
Autor
Molck, MC
Vieira, TP
Sgardioli, IC
Simioni, M
dos Santos, AP
Souza, J
Monteiro, FP
Gil-da-Silva-Lopes, VL
Institución
Resumen
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) The 22q11.2 Deletion Syndrome (22q11.2DS) is the most common microdeletion syndrome in humans, with a highly variable phenotype. This chromosomal region contains low copy repeat (LCR) sequences that mediate non-allelic homologous recombination which predispose to copy number abnormalities at this locus. This article describes three patients investigated for suspicion of 22q11.2DS presenting atypical copy number abnormalities overlapping or not with the common similar to 3 Mb deletion. They were investigated by G-banding karyotype, Multiplex-ligation dependent probe amplification (MLPA) and array Genomic Hibridization (aGH). Clinical and molecular data were compared with literature, in order to contribute to genotype-phenotype correlation. Atypical chromosomal abnormalities were detected: 3.6 Mb deletion at 22q11.21-q11.23 between LCRs B-F in patient 1 and approximately 1.5 Mb deletion at 22q11.21-q11.22 between LCRs D-E in patients 2 and 3. The breakpoints detected in patient 1 have not been previously described. These findings exemplify the complexity and genetic heterogeneity observed in 22q11.2 region and corroborates the idea that genetic modifiers contribute to the phenotypic variability observed in proximal and distal 22q11.2 deletion syndromes. (c) 2013 Elsevier Masson SAS. All rights reserved. 56 9 515 520 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) FAPESP [2009/85756-1, 2009/098756-1] CNPq [304455/2012-1]
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