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Published on: August 15, 2019
A deletion variant in LMX1B causing nail-patella syndrome in Japanese twins
Nozomu Kishio1,2, Kazuhiro Iwama3,4,5, Sayuri Nakanishi6,7
1Department of Maternal and Perinatal Center, Yokohama City University Medical Center, Yokohama, Japan. k.spera15@gmail.com.
Abstract:
Nail-patella syndrome (NPS) is a hereditary disease caused by pathogenic variants in LMX1B and characterized by nail, limb, and renal symptoms. This study revealed a likely pathogenic LMX1B variant, NM_002316.4: c.723_726delinsC (p.Ser242del), in Japanese twins with clubfoot. The patients' mother, who shared this variant, developed proteinuria after delivery. p.Ser242del is located in the homeodomain of the protein, in which variants that cause renal disease tend to cluster. Our findings highlight p.Ser242del as a likely pathogenic variant, expanding our knowledge of NPS.
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