A familial case of nail patella syndrome with a heterozygous in-frame indel mutation in the LIM domain of LMX1B

Nail patella syndrome is a autosomal dominant disorder caused by a genetic alteration in LMX1B. We identified a novel heterozygous in-frame indel mutation of LMX1B in a family of Nail patella syndrome. Impaired transcriptional activity but not dominant negative effect of mutant LMX1B were revealed using a transcriptional reporter assay, indicating that the mutation caused nail patella syndrome in this family via haploinsufficiency of the transcriptional activity of LMX1B. (C) 2017 Japanese Society for Investigative Dermatology. Published by Elsevier Ireland Ltd. All rights reserved.