@article {10769,
	title = {De novo unbalanced translocations have a complex history/aetiology.},
	journal = {Hum Genet},
	volume = {137},
	year = {2018},
	month = {2018 Oct},
	pages = {817-829},
	abstract = {<p>We investigated 52 cases of de novo unbalanced translocations, consisting in a terminally deleted or inverted-duplicated deleted (inv-dup del) 46th chromosome to which the distal portion of another chromosome or its opposite end was transposed. Array CGH, whole-genome sequencing, qPCR, FISH, and trio genotyping were applied. A biparental origin of the deletion and duplication was detected in 6 cases, whereas in 46, both imbalances have the same parental origin. Moreover, the duplicated region was of maternal origin in more than half of the cases, with 25\% of them showing two maternal and one paternal haplotype. In all these cases, maternal age was increased. These findings indicate that the primary driver for the occurrence of the de novo unbalanced translocations is a maternal meiotic non-disjunction, followed by partial trisomy rescue of the supernumerary chromosome present in the trisomic zygote. In contrast, asymmetric breakage of a dicentric chromosome, originated either at the meiosis or postzygotically, in which the two resulting chromosomes, one being deleted and the other one inv-dup del, are repaired by telomere capture, appears at the basis of all inv-dup del translocations. Notably, this mechanism also fits with the origin of some simple translocations in which the duplicated region was of paternal origin. In all cases, the signature at the translocation junctions was that of non-homologous end joining (NHEJ) rather than non-allelic homologous recombination (NAHR). Our data imply that there is no risk of recurrence in the following pregnancies for any of the de novo unbalanced translocations we discuss here.</p>},
	keywords = {DNA End-Joining Repair, Female, Humans, Male, Meiosis, Recombinational DNA Repair, Translocation, Genetic},
	issn = {1432-1203},
	doi = {10.1007/s00439-018-1941-9},
	author = {Bonaglia, Maria Clara and Kurtas, Nehir Edibe and Errichiello, Edoardo and Bertuzzo, Sara and Beri, Silvana and Mehrjouy, Mana M and Provenzano, Aldesia and Vergani, Debora and Pecile, Vanna and Novara, Francesca and Reho, Paolo and Di Giacomo, Marilena Carmela and Discepoli, Giancarlo and Giorda, Roberto and Aldred, Micheala A and Santos-Rebou{\c c}as, C{\'\i}ntia Barros and Goncalves, Andressa Pereira and Abuelo, Diane N and Giglio, Sabrina and Ricca, Ivana and Franchi, Fabrizia and Patsalis, Philippos and Sismani, Carolina and Mor{\'\i}, Mar{\'\i}a Angeles and Nevado, Juli{\'a}n and Tommerup, Niels and Zuffardi, Orsetta}
}
