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| Skeletal dysplasia v0.330 | DMRT2 |
Krithika Murali gene: DMRT2 was added gene: DMRT2 was added to Skeletal dysplasia. Sources: Literature Mode of inheritance for gene: DMRT2 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: DMRT2 were set to PMID: 41014130; 29681102; 16387292 Phenotypes for gene: DMRT2 were set to skeletal dysplasia MONDO:0018230; DMRT2-related Review for gene: DMRT2 was set to AMBER Added comment: PMID: 41014130 Rips et al 2025 report a newborn of consanguineous non-AJ ancestry with severe costovertebral malformations, dysmorphism and homozygous LoF DMRT2 variant identified on singleton exome sequencing (no parental testing). The patient also had congenital heart disease, bilateral duplicated kidneys, cleft palate, inguinal hernias.This patient also had immunodeficiency with thymic aplasia, absence of TRECs on NBS, profound lymphopenia with death at 3 months of age from CMV pneumonitis. Prenatal features include severe polyhydramnios. PMID: 29681102 Bouman et al 2018 report a male neonate of consanguineous North African descent with thoracic vertebral anomalies, rib anomalies, dysmorphism and severe respiratory deficiency resulting in neonatal death at 9 days of age. Extra-skeletal anomalies included aberrate right subclavian artery, non-functional left kidney and tetehterd cord.Prenatal features included increased NT (8.0mm), scoliosis (15+4 weeks), IUGR/kyphoscoliosis/small thoracic cage (28+2 weeks). Trio WES identified a homozygous start-loss DMRT2 variant (c.1A>T p.Met1?) classified as a VUS. In addition, a homozygous canonical acceptor site variant in the non-canonical transcript was detected in SH3PXD2B associated with Frank-Ter Haar syndrome which is also known to have skeletal features including rarely respiratory failure leading to neonatal death (PMID: 31978614). The parents were heterozygous for both sets of variants and the unaffected sibling was homozygous wild-type. PMID: 16387892 Seo et al 2006 report a knockout mouse model with abnormal rib and sternal development, respiratory insufficiency. Overlapping features between the 2 unrelated patients and the mouse model include severe skeletal manifestations. However, one of the reported cases also had an alternative genomic finding relevant to skeletal issues. Other overlapping features observed in the 2 patients and not in the mouse include congenital heart defects and CAKUT. Sources: Literature |
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| Skeletal dysplasia v0.182 | KIF5B |
Chirag Patel gene: KIF5B was added gene: KIF5B was added to Skeletal dysplasia. Sources: Literature Mode of inheritance for gene: KIF5B was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: KIF5B were set to PMID: 35342932 Phenotypes for gene: KIF5B were set to Kyphomelic dysplasia, no OMIM # Review for gene: KIF5B was set to GREEN Added comment: 4 individuals with Kyphomelic dysplasia (severe bowing of the limbs, sharp angulation of the femora and humeri, short stature, narrow thorax, distinctive facial features, and neonatal respiratory distress. WES found de novo heterozygous missense variants in KIF5B encoding kinesin-1 heavy chain. All variants involved conserved amino acids in or close to the ATPase activity-related motifs in the catalytic motor domain of the KIF5B protein. No functional studies of variants. Previously 2 animal model experiments showed that loss of function of KIF5B can cause kyphomelic dysplasia. First, chondrocyte-specific knockout of Kif5b in mice was shown to produce a disorganized growth plate, leading to bone deformity. Second, double mutants disrupting the two zebrafish kif5b caused abnormal skeletal morphogenesis and the curvature of Meckel's and ceratohyal cartilages. Sources: Literature |
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| Skeletal dysplasia v0.0 | PIR |
Zornitza Stark gene: PIR was added gene: PIR was added to Skeletal dysplasia. Sources: Expert Review Red Mode of inheritance for gene: PIR was set to Unknown Publications for gene: PIR were set to 16183656; 19766747 Phenotypes for gene: PIR were set to Osteoporosis |
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