Male-to-male transmission in Laurin-Sandrow syndrome and exclusion of RARB and RARG

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We report on a father and a son with nasal and limb defects characteristic of Laurin-Sandrow syndrome (LSS) excluding for the first time X-linked inheritance in this rare condition. Based on a search for genes expressed late during nose formation and early in limb formation we identified retinoic acid receptor B (RARB) and retinoic acid receptor G (RARG) as possible candidate genes and sequenced bidirectionally including all exons and intron-exon bounders. We identified a single nucleotide substitution in intron 2 of RARB, which is conserved in human, chimp, dog, mouse, rat, and chicken. However, it was located 83 bp from exon 2, suggesting it is a rare polymorphism which does not account for the phenotype. No other mutations were found. This suggests that another yet unknown gene is responsible for the condition.
Original languageEnglish
JournalAmerican Journal of Medical Genetics. Part A
Issue number2
Pages (from-to)148-52
Number of pages4
Publication statusPublished - 2005

Bibliographical note

Keywords: Abnormalities, Multiple; Adult; Child; Foot Deformities, Congenital; Genetic Predisposition to Disease; Hand Deformities, Congenital; Humans; Inheritance Patterns; Male; Nose; Receptors, Retinoic Acid; Sex Factors; Syndrome

ID: 10795724