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Neurologic phenotype of Schimke immuno-osseous dysplasia and neurodevelopmental expression of SMARCAL1

By K. Deguchi, J.M. Clewing, L.I. Elizondo, R. Hirano, C. Huang, K. Choi, E.A. Sloan, T. Lucke, K.M. Marwedel, R. Powell, K. SantaCruz, Y. Fujita, S. Willaime-Morawek, K. Inoue, S. Lou, J. Northrop, Y. Kanemura, D. van der Kooy, H. Okano, D.L. Armstrong and C.F. Boerkoel

Abstract

Schimke immuno-osseous dysplasia (OMIM 242900) is an uncommon autosomal-recessive multisystem disease caused by mutations in SMARCAL1 (swi/snf-related, matrix-associated, actin-dependent regulator of chromatin, subfamily a-like 1), a gene encoding a putative chromatin remodeling protein. Neurologic manifestations identified to date relate to enhanced atherosclerosis and cerebrovascular disease. Based on a clinical survey, we determined that half of Schimke immuno-osseous dysplasia patients have a small head circumference, and 15% have social, language, motor, or cognitive abnormalities. Postmortem examination of 2 Schimke immuno-osseous dysplasia patients showed low brain weights and subtle brain histologic abnormalities suggestive of perturbed neuron-glial migration such as heterotopia, irregular cortical thickness, incomplete gyral formation, and poor definition of cortical layers. We found that SMARCAL1 is highly expressed in the developing and adult mouse and human brain, including neural precursors and neuronal lineage cells. These observations suggest that SMARCAL1 deficiency may influence brain development and function in addition to its previously recognized effect on cerebral circulation

Topics: RB, RC0321
Year: 2008
OAI identifier: oai:eprints.soton.ac.uk:66444
Provided by: e-Prints Soton

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