De Novo Variants in LMNB1 Cause Pronounced Syndromic Microcephaly and Disruption of Nuclear Envelope Integrity

Lamin B1 plays an important role in the nuclear envelope stability, the regulation of gene expression, and neural development. Duplication of LMNB1, or missense mutations increasing LMNB1 expression, are associated with autosomal-dominant leukodystrophy. On the basis of its role in neurogenesis, it has been postulated that LMNB1 variants could cause microcephaly. Here, we confirm this hypothesis with the identification of de novo mutations in LMNB1 in seven individuals with pronounced primary microcephaly (ranging from −3.6 to −12 SD) associated with relative short stature and variable degree of intellectual disability and neurological features as the core symptoms.

Source: The American Journal of Human Genetics - September 8, 2020 Category: Genetics & Stem Cells Authors: Francesca Cristofoli, Tonya Moss, Hannah W. Moore, Koen Devriendt, Heather Flanagan-Steet, Melanie May, Julie Jones, Filip Roelens, Carmen Fons, Anna Fernandez, Loreto Martorell, Angelo Selicorni, Silvia Maitz, Giuseppina Vitiello, Gerd Van der Hoeven, St Tags: Report Source Type: research