A familial chromosomal complex rearrangement confirms RUNX1T1 as a causative gene for intellectual disability and suggests that 1p22.1p21.3 duplication is likely benign.

Abstract:

Background:Complex chromosomal rearrangements are constitutive structural aberrations involving three or more breaks. They can be balanced or unbalanced and result in different outcomes, depending on deletion/duplication of genomic material, gene disruption, or position effects. Case presentation:We report on a patient presenting with severe anemia, splenomegaly, mild intellectual disability and facial dysmorphisms harboring a 4.3 Mb duplication at 1p22.1p21.3 and a 2.1 Mb deletion at 8q21.3q22.1, involving RUNX1T1 gene. The healthy brother presented the same duplication of chromosome 1p as at 1p22.1p21.3. Conclusions:The rearrangement found both these siblings resulted from malsegregation in the proband and recombination in her healthy brother of a balanced paternal complex chromosomal rearrangement. These results confirm RUNX1T1 as a causative gene for intellectual disability and suggest the 1p22.1p21.3 duplication is likely benign.

journal_name

Mol Cytogenet

journal_title

Molecular cytogenetics

authors

Restaldi F,Alesi V,Aquilani A,Genovese S,Russo S,Coletti V,Pompili D,Falasca R,Dallapiccola B,Capolino R,Luciani M,Novelli A

doi

10.1186/s13039-019-0440-6

subject

Has Abstract

pub_date

2019-06-14 00:00:00

pages

26

issn

1755-8166

pii

440

journal_volume

12

pub_type

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