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Genetic Epilepsy v0.1879 AQP4 Zornitza Stark Marked gene: AQP4 as ready
Genetic Epilepsy v0.1879 AQP4 Zornitza Stark Gene: aqp4 has been classified as Amber List (Moderate Evidence).
Genetic Epilepsy v0.1879 AQP4 Zornitza Stark Phenotypes for gene: AQP4 were changed from ?Megalencephalic leukoencephalopathy with subcortical cysts 4, remitting MIM#620448 to Megalencephalic leukoencephalopathy with subcortical cysts 4, remitting MIM#620448
Genetic Epilepsy v0.1878 AQP4 Zornitza Stark Classified gene: AQP4 as Amber List (moderate evidence)
Genetic Epilepsy v0.1878 AQP4 Zornitza Stark Gene: aqp4 has been classified as Amber List (Moderate Evidence).
Genetic Epilepsy v0.1877 AQP4 Zornitza Stark reviewed gene: AQP4: Rating: AMBER; Mode of pathogenicity: None; Publications: ; Phenotypes: Megalencephalic leukoencephalopathy with subcortical cysts 4, remitting MIM#620448; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Genetic Epilepsy v0.1876 AQP4 Lucy Spencer gene: AQP4 was added
gene: AQP4 was added to Genetic Epilepsy. Sources: Literature
Mode of inheritance for gene: AQP4 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: AQP4 were set to PMID: 37143309
Phenotypes for gene: AQP4 were set to ?Megalencephalic leukoencephalopathy with subcortical cysts 4, remitting MIM#620448
Review for gene: AQP4 was set to AMBER
Added comment: PMID: 37143309
Cohort of 5 patients with an MRI based diagnosis of megalencephalic leukoencephalopathy with subcortical cysts (MLC). Missense variant in AQP4 seen homozygous in 2 siblings and het in the parents. Patients had macrocephaly, developmental delay, hypotonia, epilepsy, and cognitive deficit.

Western blots on generated MDCK cell lines showed no detectable expression of AQP4 protein from the cells with the patients variant. Immunofluorescence also showed no membrane expression. Overexpression studies in HEK293T cells showed WT was seen as mainly monomers or dimers where as variant protein formed large aggregates- likely due to the saturation of protein degradation pathways because of the overexpression.
Sources: Literature