Abstract:
:Pericentric inversions are among the known polymorphisms detected in the general population at a frequency of 1-2%. Despite their generally benign nature, pericentric inversions affect the reproductive potential of carriers by increasing the risk for unbalanced live-born offspring, miscarriages, or other fertility problems. Here we present a novel large pericentric inversion of chromosome 9, inv(9)(p23q22.3), detected in 30 heterozygote carriers, 24 from seven apparently unrelated families and 6 isolated patients, where the probands were mainly referred for fertility and prenatal problems. The inversion carries a significant risk for recombinant abnormal chromosomes, as in two families one supernumerary rec(9)dup(9p) and one rec(9)dup(9q) were identified, leading to neonatal death and miscarriage, respectively. The inversion carriers were identified by three different laboratories in Greece, Cyprus and Germany respectively, however all carriers have Southeast European origin. The inversion appears to be more frequent in the Greek population, as the majority of the carriers were identified in Greece. We were able to determine that the inversion is identical in all individuals included in the study by applying a combination of several methodologies, such as karyotype, fluorescence in situ hybridization (FISH), chromosomal microarrays (CMA) and haplotype analysis. In addition, haplotype analysis supports that the present inversion is identical by descent (IBD) inherited from a single common ancestor. Our results are, therefore, highly indicative of a founder effect of this inversion, presumably reflecting an event that was present in a small number of individuals that migrated to the current Southeast Europe/Northern Greece from a larger population.
journal_name
J Hum Genetjournal_title
Journal of human geneticsauthors
Sismani C,Rapti SM,Iliopoulou P,Spring A,Neroutsou R,Lagou M,Robola M,Tsitsopoulos E,Kousoulidou L,Alexandrou A,Papaevripidou I,Theodosiou A,Syrrou M,Fuchs S,Hempel M,Huhle D,Liehr T,Ziegler M,Duesberg M,Velissarioudoi
10.1038/s10038-020-0769-zsubject
Has Abstractpub_date
2020-09-01 00:00:00pages
783-795issue
9eissn
1434-5161issn
1435-232Xpii
10.1038/s10038-020-0769-zjournal_volume
65pub_type
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