5q11.2 deletion syndrome revisited-Further narrowing of the smallest region of overlap for the main clinical characteristics of the syndrome

Allan Bayat*, Michael Bayat, Chantal Broers, Abeltje M Polstra, Petra J G Zwijnenburg, Tina Duelund Hjortshøj

*Corresponding author af dette arbejde

Publikation: Bidrag til tidsskriftArtikelForskningpeer review

Abstract

Microdeletions at 5q11.2 are rare. Subjects show a phenotypic spectrum that overlaps CHARGE syndrome and 22q11.2 deletion syndrome. A growing number of subjects present with learning difficulty and/or intellectual disability, immune deficiency, congenital heart malformation, and dysmorphism. DHX29 and IL6ST have been proposed as candidate genes for the development of the major clinical manifestations. We present a new case and narrow down the shortest region of overlap to evaluate possible candidate genes. Our case does not present developmental delay or immune deficiency indicating a reduced penetrance for some of the main clinical manifestations. The shortest region of overlap between subjects with deletions at 5q11.2 is approximately 450 kb (position 54.3-54.7 Mb). The narrowed region comprises 10 protein coding genes, including DHX29. DHX29 is a strong candidate gene for the main features of 5q11.2-microdeletion syndrome; however, our findings suggest a joined impact of several genes as the cause of the syndrome.

OriginalsprogEngelsk
Sider (fra-til)3844-3850
Antal sider7
TidsskriftAmerican Journal of Medical Genetics, Part A
Vol/bind185
Udgave nummer12
DOI
StatusUdgivet - dec. 2021

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