Environmental risk reshapes high-confidence schizophrenia risk genes during a developmental window of vulnerability

Early-life stress in mice reshapes schizophrenia risk gene expression, with whole-brain upregulation peaking at postnatal day 21 (P21) and showing hypothalamus-centered, cell-type-selective effects.

• Why it matters: It remains unclear whether environmental adversity alters the developmental expression of genetically implicated schizophrenia genes, limiting molecular links between early-life stress and genetic vulnerability.
• What they did: The study combined the limited bedding and nesting (LBN) model with 24-plex single-cell mFISH mapped to the Allen Mouse Brain Atlas, profiling 1.29 million cells across four postnatal ages for SCHEMA genes plus C4b and activity markers.
• The result: Risk-gene upregulation was greatest at P21; Sp4 and Cacna1g showed distinct temporal patterns in hypothalamic oligodendrocytes, and ELS-linked C4b upregulation spanned neuronal and glial populations, with P10 C4b effects positively correlated with P21 Grin2a effects.