Joubert syndrome: congenital cerebellar ataxia with the molar tooth.
摘要：
Joubert syndrome is a congenital cerebellar ataxia with autosomal recessive or X-linked inheritance, the diagnostic hallmark of which is a unique cerebellar and brainstem malformation recognisable on brain imaging—the so-called molar tooth sign. Neurological signs are present from the neonatal period and include hypotonia progressing to ataxia, global developmental delay, ocular motor apraxia, and breathing dysregulation. These signs are variably associated with multiorgan involvement, mainly of the retina, kidneys, skeleton, and liver. 21 causative genes have been identified so far, all of which encode for proteins of the primary cilium or its apparatus. The primary cilium is a subcellular organelle that has key roles in development and in many cellular functions, making Joubert syndrome part of the expanding family of ciliopathies. Notable clinical and genetic overlap exists between distinct ciliopathies, which can co-occur even within families. Such variability is probably explained by an oligogenic model of inheritance, in which the interplay of mutations, rare variants, and polymorphisms at distinct loci modulate the expressivity of the ciliary phenotype.
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关键词：
SYNDROME-RELATED DISORDERS BASAL BODY PROTEIN BARDET-BIEDL-SYNDROME NPHP1 GENE DELETION PRIMARY CILIA HEPATIC-FIBROSIS COACH SYNDROME STEM-CELLS RETINAL DEGENERATION CENTROSOMAL PROTEIN
DOI：
10.1016/S1474-4422(13)70136-4
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年份：
2013
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