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Unusual 8p inverted duplication deletion with telomere capture from 8q.

Abstract：

:Inverted 8p duplication deletions are recurrent chromosomal rearrangements that are mediated through non-allelic homologous recombination (NAHR) between olfactory receptor (OR) gene clusters at 8p23.1. These rearrangements result in a proximal inverted duplication of various extent, a single copy region between the OR gene clusters and a terminal 8p deletion. The terminal deletions are stabilized by direct addition of telomeric repeats, so called telomere healing. Here, we report a patient with an unusual inverted duplication deletion of 8p. Stabilization of the broken chromosome end was achieved by telomere capture instead of telomere healing, resulting in an additional duplication of 8q24.13-->qter on the short arm of chromosome 8. Moreover, the inverted duplication was only 3.4 Mb in size (restricted to band 8p22) and thus cytogenetically undetectable. To the best of our knowledge this is the smallest inverted duplication reported hitherto. We describe the molecular characterization by FISH and array CGH of this unusual inv dup del (8p) and a previously reported patient with a similar 8q duplication and review the literature on cases associated with telomere capture.

journal_name

Eur J Med Genet

journal_title

European journal of medical genetics

authors

Buysse K,Antonacci F,Callewaert B,Loeys B,Fränkel U,Siu V,Mortier G,Speleman F,Menten B

doi

10.1016/j.ejmg.2008.10.007

subject

Has Abstract

pub_date

2009-01-01 00:00:00

pages

31-6

issue

1

eissn

1769-7212

issn

1878-0849

pii

S1769-7212(08)00156-0

journal_volume

52

pub_type

杂志文章

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