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Increased LIS1 expression affects human and mouse brain development

AutorBi, Weimin; Sapir, Tamar; Shchelochkov, Oleg A.; Zhang, Feng; Withers, Marjorie A.; Hunter, Jill V.; Levy, Talia; Shinder, Vera; Peiffer, Daniel A.; Gunderson, Kevin L.; Nezarati, Marjan M.; Shotts, Vern Ann; Amato, Stephen S.; Savage, Sarah K.; Harris, David J.; Day-Salvatore, Debra-Lynn; Horner, Michele; Lu, Xin-Yan; Sahoo, Trilochan; Yanagawa, Yuchio; Beaudet, Arthur L.; Cheung, Sau Wai; Martínez, Salvador; Lupski, James R.; Reiner, Orly
Palabras claveLIS1
Chromosome 17
Gene deletion
Miller-Dieker syndrome
Brain abnormalities
Human genetics
Fecha de publicación11-ene-2009
EditorNature Publishing Group
CitaciónNature Genetics, doi:10.1038/ng.302
ResumenDeletions of the PAFAH1B1 gene (encoding LIS1) in 17p13.3 result in isolated lissencephaly sequence, and extended deletions including the YWHAE gene (encoding 14-3-3) cause Miller-Dieker syndrome. We identified seven unrelated individuals with submicroscopic duplication in 17p13.3 involving the PAFAH1B1 and/or YWHAE genes, and using a 'reverse genomics' approach, characterized the clinical consequences of these duplications. Increased PAFAH1B1 dosage causes mild brain structural abnormalities, moderate to severe developmental delay and failure to thrive. Duplication of YWHAE and surrounding genes increases the risk for macrosomia, mild developmental delay and pervasive developmental disorder, and results in shared facial dysmorphologies. Transgenic mice conditionally overexpressing LIS1 in the developing brain showed a decrease in brain size, an increase in apoptotic cells and a distorted cellular organization in the ventricular zone, including reduced cellular polarity but preserved cortical cell layer identity. Collectively, our results show that an increase in LIS1 expression in the developing brain results in brain abnormalities in mice and humans.
Descripción10 pages, 7 figures.-- Supplementary information (Suppl. data, 17 pages, and suppl. movies S1-S2) available at: http://www.nature.com/ng/journal/vaop/ncurrent/suppinfo/ng.302_S1.html
Versión del editorhttp://dx.doi.org/10.1038/ng.302
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