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Generation of the Sotos syndrome deletion in mice.

Authors:
Migdalska AM, van der Weyden L, Ismail O, Sanger Mouse Genetics Project, Rust AG, Rashid M, White JK, Sánchez-Andrade G, Lupski JR, Logan DW, Arends MJ, Adams DJ
Affiliation:
Journal:
Mammalian genome : official journal of the International Mammalian Genome Society

Abstract

Haploinsufficiency of the human 5q35 region spanning the NSD1 gene results in a rare genomic disorder known as Sotos syndrome (Sotos), with patients displaying a variety of clinical features, including pre- and postnatal overgrowth, intellectual disability, and urinary/renal abnormalities. We used chromosome engineering to generate a segmental monosomy, i.e., mice carrying a heterozygous 1.5-Mb deletion of 36 genes on mouse chromosome 13 (4732471D19Rik-B4galt7), syntenic with 5q35.2-q35.3 in humans (Df(13)Ms2Dja ( +/- ) mice). Surprisingly Df(13)Ms2Dja ( +/- ) mice were significantly smaller for their gestational age and also showed decreased postnatal growth, in contrast to Sotos patients. Df(13)Ms2Dja ( +/- ) mice did, however, display deficits in long-term memory retention and dilation of the pelvicalyceal system, which in part may model the learning difficulties and renal abnormalities observed in Sotos patients. Thus, haploinsufficiency of genes within the mouse 4732471D19Rik-B4galt7 deletion interval play important roles in growth, memory retention, and the development of the renal pelvicalyceal system.

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