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Prepair 1000+ v1.1268 GJA1 Michelle Torres changed review comment from: The GJA1 gene is associated with both AD & AR conditions (OMIM).

For carrier screening testing, the only relevant conditions are the AR disorders: Craniometaphyseal dysplasia MIM#218400; Oculodentodigital dysplasia MIM#257850.

Craniometaphyseal dysplasia (CMD) is a rare sclerosing skeletal disorder with progressive hyperostosis of craniofacial bones. Characteristic ocular and dental features of ODDD as well as syndactyly are absent in patients with CMD (PMID: 23951358). Reports are rare and individuals are homozygous for the p.(Arg239Gln), located in the C-terminus of the GJA1 gene; at least 4x families reported (PMID: 23951358).

Oculodentodigital dysplasia (ODDD) is a rare condition characterised by a typical facial appearance and variable findings of the eyes, teeth, and fingers (PMID: 29902798). ODDD is generally AD (DN and GoF suggested), but rare AR cases have been identified. LoF is associated with AR ODDD (PMID: 29902798), and most variants reported are PTV within the connexin domain (PMID: 34035645).

NB: the association with Hypoplastic left heart syndrome 1, MIM#241550 isn't listed in OMIM anymore, variants associated have been re-classified VUS (OMIM). Pfitzer C 2024 concludes that researchers must move beyond the expectation that a single disease-causing variant can be found (PMID 38884762).; to: The GJA1 gene is associated with both AD & AR conditions (OMIM).

For carrier screening testing, the only relevant conditions are the AR disorders: Craniometaphyseal dysplasia MIM#218400; Oculodentodigital dysplasia MIM#257850.

Craniometaphyseal dysplasia (CMD) is a rare sclerosing skeletal disorder with progressive hyperostosis of craniofacial bones. Characteristic ocular and dental features of ODDD as well as syndactyly are absent in patients with CMD (PMID: 23951358). Reports are rare and individuals are homozygous for the p.(Arg239Gln), located in the C-terminus of the GJA1 gene; at least 4x families reported (PMID: 23951358).

Oculodentodigital dysplasia (ODDD) is a rare condition characterised by a typical facial appearance and variable findings of the eyes, teeth, and fingers (PMID: 29902798). ODDD is generally AD (DN and GoF suggested), but rare AR cases have been identified. LoF is associated with AR ODDD (PMID: 29902798), and most variants reported are PTV within the connexin domain (PMID: 34035645).

NB: the association with Hypoplastic left heart syndrome 1, MIM#241550 isn't listed in OMIM anymore, variants associated have been re-classified VUS (OMIM; PMID 38884762).
Prepair 1000+ v1.1056 GJA1 Zornitza Stark Marked gene: GJA1 as ready
Prepair 1000+ v1.1056 GJA1 Zornitza Stark Gene: gja1 has been classified as Green List (High Evidence).
Prepair 1000+ v1.1056 GJA1 Zornitza Stark Phenotypes for gene: GJA1 were changed from Hypoplastic left heart syndrome 1, 241550 (3) to Craniometaphyseal dysplasia, autosomal recessive MIM#218400; Oculodentodigital dysplasia, autosomal recessive MIM#257850
Prepair 1000+ v1.1055 GJA1 Zornitza Stark Publications for gene: GJA1 were set to
Prepair 1000+ v1.992 GJA1 Michelle Torres reviewed gene: GJA1: Rating: GREEN; Mode of pathogenicity: None; Publications: 23951358, 29902798, 34035645; Phenotypes: Craniometaphyseal dysplasia, autosomal recessive MIM#218400, Oculodentodigital dysplasia, autosomal recessive MIM#257850; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Prepair 1000+ v0.0 GJA1 Zornitza Stark gene: GJA1 was added
gene: GJA1 was added to Reproductive Carrier Screen_VCGS. Sources: Mackenzie's Mission,Expert Review Green
Mode of inheritance for gene: GJA1 was set to BIALLELIC, autosomal or pseudoautosomal
Phenotypes for gene: GJA1 were set to Hypoplastic left heart syndrome 1, 241550 (3)