Heterozygous pathogenic variants in GLI1 are a common finding in isolated postaxial polydactyly A/B

Autor: Palencia-Campos A, Martínez-Fernández ML, Altunoglu U, Soto-Bielicka P, Torres A, Marín P, Aller E, Sentürk L, Berköz Ö, Yildiran M, Kayserili H, Gil-Camarero E, Colli-Lista G, Sanchís-Calvo A, Carretero A, ECEMC Working Group on Polydactyly, Guillén-Navarro E, López-González V, Ballesta-Martínez M, Rosell J, Aglan MS, Temtamy S, Otaify GA, Cuevas-Catalina L, Torres-Saavedra MN, Nevado J, Tenorio J, Lapunzina P, Bermejo-Sánchez E, Ruiz-Pérez VL
Rok vydání: 2020
Předmět:
Zdroj: HUMAN MUTATION
r-FISABIO. Repositorio Institucional de Producción Científica
instname
r-FISABIO: Repositorio Institucional de Producción Científica
Fundación para el Fomento de la Investigación Sanitaria y Biomédica de la Comunitat Valenciana (FISABIO)
r-IIS La Fe. Repositorio Institucional de Producción Científica del Instituto de Investigación Sanitaria La Fe
ISSN: 1098-1004
1059-7794
Popis: Postaxial polydactyly (PAP) is a frequent limb malformation consisting in the duplication of the fifth digit of the hand or foot. Morphologically, this condition is divided into type A and B, with PAP-B corresponding to a more rudimentary extra-digit. Recently, bi-allelic truncating variants in the transcription factor GLI1 were reported to be associated with a recessive disorder, which in addition to PAP-A, may include syndromic features. Moreover, two heterozygous subjects carrying only one inactive copy of GLI1 were also identified with PAP. Herein, we aimed to determine the level of involvement of GLI1 in isolated PAP, a condition previously established to be autosomal dominantly inherited with incomplete penetrance. We analysed the coding region of GLI1 in 95 independent probands with non-syndromic PAP and found 11.57% of these subjects with single heterozygous pathogenic variants in this gene. The detected variants lead to premature termination codons or result in amino acid changes in the DNA-binding domain of GLI1 that diminish its transactivation activity. Family segregation analysis of these variants was consistent with dominant inheritance with incomplete penetrance. We conclude that heterozygous changes in GLI1 underlie a significant proportion of sporadic or familial cases of isolated PAP-A/B. This article is protected by copyright. All rights reserved.
Databáze: OpenAIRE
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