Journal of medical genetics · 2014
Mutation in PLK4, encoding a master regulator of centriole formation, defines a novel locus for primordial dwarfism.
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Shaheen Ranad, Al Tala Saeed, Almoisheer Agaadir, Alkuraya Fowzan S
Аннотация
BACKGROUND: Primordial dwarfism (PD) is a heterogeneous clinical entity characterised by severe prenatal and postnatal growth deficiency. Despite the recent wave of disease gene discovery, the causal mutations in many PD patients remain unknown.
OBJECTIVE: To describe a PD family that maps to a novel locus.
METHODS: Clinical, imaging and laboratory phenotyping of a new family with PD followed by autozygosity mapping, linkage analysis and candidate gene sequencing.
RESULTS: We describe a multiplex consanguineous Saudi family in which two full siblings and one half-sibling presented with classical features of Seckel syndrome in addition to optic nerve hypoplasia. We were able to map the phenotype to a single novel locus on 4q25-q28.2, in which we identified a five base-pair deletion in PLK4, which encodes a master regulator of centriole duplication.
CONCLUSIONS: Our discovery further confirms the role of genes involved in centriole biology in the pathogenesis of PD.
OBJECTIVE: To describe a PD family that maps to a novel locus.
METHODS: Clinical, imaging and laboratory phenotyping of a new family with PD followed by autozygosity mapping, linkage analysis and candidate gene sequencing.
RESULTS: We describe a multiplex consanguineous Saudi family in which two full siblings and one half-sibling presented with classical features of Seckel syndrome in addition to optic nerve hypoplasia. We were able to map the phenotype to a single novel locus on 4q25-q28.2, in which we identified a five base-pair deletion in PLK4, which encodes a master regulator of centriole duplication.
CONCLUSIONS: Our discovery further confirms the role of genes involved in centriole biology in the pathogenesis of PD.