TMEM161B modulates radial glial scaffolding in neocortical development

TMEM161B encodes an evolutionarily conserved widely expressed novel 8-pass transmembrane protein of unknown function in human. Here we identify TMEM161B homozygous hypomorphic missense variants in our recessive polymicrogyria (PMG) cohort. Patients carrying TMEM161B mutations exhibit striking neocor...

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Detalles Bibliográficos
Autores principales: Wang, Lu, Heffner, Caleb, Vong, Keng loi, Barrows, Chelsea, Ha, Yoo-Jin, Lee, Sangmoon, Lara-Gonzalez, Pablo, Jhamb, Ishani, Van Der Meer, Dennis, Loughnan, Robert, Parker, Nadine, Sievert, David, Mittal, Swapnil, Issa, Mahmoud Y., Andreassen, Ole A., Dale, Anders, Dobyns, William B., Zaki, Maha S., Murray, Stephen A., Gleeson, Joseph G.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: National Academy of Sciences 2023
Materias:
Biological Sciences
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9942823/
https://www.ncbi.nlm.nih.gov/pubmed/36669109
http://dx.doi.org/10.1073/pnas.2209983120
Descripción
Sumario:TMEM161B encodes an evolutionarily conserved widely expressed novel 8-pass transmembrane protein of unknown function in human. Here we identify TMEM161B homozygous hypomorphic missense variants in our recessive polymicrogyria (PMG) cohort. Patients carrying TMEM161B mutations exhibit striking neocortical PMG and intellectual disability. Tmem161b knockout mice fail to develop midline hemispheric cleavage, whereas knock-in of patient mutations and patient-derived brain organoids show defects in apical cell polarity and radial glial scaffolding. We found that TMEM161B modulates actin filopodia, functioning upstream of the Rho-GTPase CDC42. Our data link TMEM161B with human PMG, likely regulating radial glia apical polarity during neocortical development.

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