Nature Neuroscience · 11 August 2026 · From issue 22
Modeling maternal immune activation in 3D ex vivo human fetal brain cerebroids reveals IL-17A-driven disruption of cortical development
In lab-grown human fetal brain tissue, an immune signal sped up brain growth and caused early folding.
Muhammad Z. K. Assir, Mario Yanakiev et al.
A lab-made 3D model of real human fetal brain tissue lets scientists study how infections during pregnancy affect brain growth. A signal called IL-17A, made by the immune system during infections, caused the tissue to fold too early. It also grew thicker and made brain cells too fast. This signal switched on a stress pathway inside brain stem cells, and a drug blocking that pathway reversed the changes.
Shows a possible cause and a possible fix, both tested only in lab tissue, not in pregnancy.
Lab-grown tissue only, no living pregnancies tested yet.
Integrity screen: passed (3 checks) Checked 31 August 2026. Retraction record: none. DOI resolves at doi.org. Metadata record found (Nature Neuroscience). Read the source
This screen checks process signals. It does not tell you the findings are true.