De novo case of a partial tetrasomy 16p (CROSBI ID 661831)
Prilog sa skupa u časopisu | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Škrlec, Ivana ; Pušeljić, Silvija ; Lovrečić, Luca ; Peterlin, Borut ; Wagner, Jasenka
engleski
De novo case of a partial tetrasomy 16p
Chromosome 16p duplication has been observed in number of individuals, but tetrasomy of chromosome 16p has not been reported. Duplication 16p is usually observed as a part of complex syndromes among families with structural chromosomal rearrangements. Described duplications of the proximal 16p arm vary from small, interstitial duplications to whole arm duplications. The phenotype of individuals with duplication varies from normal to severe, depending on the size of the duplication and potential additional chromosomal rearrangement. Here we present the clinical and cytogenetic findings in a 6-year-old female referred for genetic evaluation because of psychomotor delay and dysmorphic features, including low set ears, long philtrum, gothic palate, wide spaced nipples, clinodactyly and epileptic seizures. Cytogenetic examination of GTG banded metaphases showed a female karyotype with additional material on the short arm of chromosome 16. Extended molecular cytogenetic analysis (arrayCGH) showed female molecular karyotype with four copies of the 16p13.11p11.2 region. Size of the amplification is 11.8±0.1 Mb. The proband’s karyotype can be reported as: 46, XX, add(16)dn.arr[hg19]16p13.11p11.2(16, 525, 28 9-28, 318, 164)x4. Proband’s parents have normal karyotypes. The size and boundaries of structural chromosome anomalies arising de novo are usually difficult to define, based only on classical cytogenetic analysis, due to its limited resolution. We have compared the clinical features of our proband to other patients carrying a duplication of proximal part of 16p as described in the literature. Four copies of genes on chromosome 16p11.2-p13.11 seem to result in greater developmental disturbance than are reported in patients with three doses of the same genes. This is supported by animal model as well, where research on mice showed that tetrasomy of chromosome 16 had much more deleterious effects on embryonic development than did trisomy of the same chromosome.
DNA microarray ; tetrasomy ; chromosome 16
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Podaci o prilogu
1.P54
2015.
nije evidentirano
objavljeno
Podaci o matičnoj publikaciji
Chromosome research
0967-3849
1573-6849
Podaci o skupu
10th European Cytogenetic Conference
poster
04.07.2015-07.07.2015
Strasbourg, Francuska
Povezanost rada
Kliničke medicinske znanosti, Temeljne medicinske znanosti