ArticleEMBO reports2026
Cerebral organoids expressing mutant actin genes reveal cellular mechanism underlying microcephaly.
Article in EMBO reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Coordinated neural progenitor adaptations contribute to primate neocortical downscaling.Science advances · 2026Article
- Architects of the Developing Brain: Cytoskeleton-Organizing Molecules in Neurodevelopmental Disorders.Cells · 2026Review
- Molecular genotype-phenotype correlation in ACTB- and ACTG1-related non-muscle actinopathies.American journal of human genetics · 2026Article
- The Baraitser-Winter Cerebrofrontofacial Syndrome Recurrent R196H Variant in Cytoplasmic β-Actin Impairs Its Cellular Polymerization and Stability.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2026Article
- A dyad of human-specificScience advances · 2025Article
- Genetics of human brain development.Nature reviews. Genetics · 2024Review
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Authors and funding
20 authors.
Funding
Abstract
Actins are cytoskeletal proteins that are essential for multiple cellular processes. Mutations in the ACTB and ACTG1 genes, encoding the ubiquitous beta- and gamma-cytoskeletal actin isoforms, respectively, cause a broad spectrum of neurodevelopmental disorders, with microcephaly as the most frequent one. To investigate the pathogenesis underlying this cortical malformation, we studied patient-derived cerebral organoids from induced pluripotent stem cells of individuals with the Baraitser-Winter-CerebroFrontoFacial syndrome (BWCFF-S) carrying an ACTB/ACTG1 missense mutation. These organoids were reduced in size, showing a thinner ventricular zone (VZ) due to reduced VZ progenitor abundance. Strikingly, VZ progenitors in BWCFF-S cerebral organoids displayed a shift in the orientation of their cleavage plane from a predominantly vertical to a majoritarian horizontal orientation. The latter cleavage plane orientation is incompatible with increasing VZ progenitor abundance and instead promotes basal progenitor generation. Various cytoskeletal and morphological irregularities of BWCFF-S VZ progenitors, notably in the apical region, seemingly contribute to this change in cleavage plane orientation. Our results provide insight into the cell biological basis of the microcephaly associated with BWCFF-S caused by actin mutations.
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