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Fetal anomalies v0.2747 MAST1 Zornitza Stark Marked gene: MAST1 as ready
Fetal anomalies v0.2747 MAST1 Zornitza Stark Gene: mast1 has been classified as Green List (High Evidence).
Fetal anomalies v0.2747 MAST1 Zornitza Stark Classified gene: MAST1 as Green List (high evidence)
Fetal anomalies v0.2747 MAST1 Zornitza Stark Gene: mast1 has been classified as Green List (High Evidence).
Fetal anomalies v0.2728 MAST1 Krithika Murali gene: MAST1 was added
gene: MAST1 was added to Fetal anomalies. Sources: Literature
Mode of inheritance for gene: MAST1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: MAST1 were set to 32818970; 32198973; 31721002; 30449657
Phenotypes for gene: MAST1 were set to Mega-corpus-callosum syndrome with cerebellar hypoplasia and cortical malformations - #61827; corpus callosum anomalies; cortical malformations; cerebellar hypoplasia
Review for gene: MAST1 was set to GREEN
Added comment: Neurodevelopmental disorder with muscular hypotonia and varying brain anomalies which may be diagnosed antenatally.

Reported cases include x1 individual reported to have hydrocephalus antenatally (PMID 32818970). MRI-B at 17 months demonstrated polymicrogyria, hyperplastic corpus callosum, progressive pontine hypoplasia and enlarged ventricles.

Another female patient reported with antenatal findings of increased nuchal translucency in a pregnancy complicated by oligohydramnios, IUGR, pre-eclampsia and pre-term delivery at 32 weeks (PMID 32198973). Postnatally diagnosed with cortical malformations without cerebellar hypoplasia.

6 unrelated patients with mega-corpus-callosum syndrome with cerebellar hypoplasia and cortical malformations (MCCCHCM) with de novo heterozygous mutations in MAST1 gene (30449657). In vitro functional studies showed that 1 of the variants (lys276del) increased MAST1 binding to microtubules compared to controls. Mutant mice heterozygous for a Mast1 leu278del allele showed a thicker corpus callosum compared to wildtype, and an overall reduction in cortical volume and thickness and decreased cerebellar volume and number of granule and Purkinje cells due to increased apoptosis compared to controls.

1 Emirati patient with ID, microcephaly, and dysmorphic features, with missense variant in MAST1 (30449657)
Sources: Literature