Transcriptomics

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Ozone exposure differentially changed global gene expression at brainstem and hypothalamus in healthy (SHAM) and adrenalectomized rats


ABSTRACT: Ozone exposure in SHAM rats resulted in increases and decreases in expression of hundreds of genes in brainstem and hypothalamus relative to air-exposed SHAM rats (303 and 568 genes, respectively). Adrenalectomy in air-exposed rats resulted in few significant transcriptional differences in the brainstem and hypothalamus (~20 genes per tissue). Differentially expressed genes from ozone exposure were enriched for pathways involving hedgehog signaling, responses to alpha-interferon, hypoxia, and mTORC1, among others. Gene changes in both brain areas were analogous to those altered by corticosteroids and L-dopa, suggesting a role for endogenous glucocorticoids and catecholamines. AD completely prevented this ozone-induced transcriptional response. These findings show that short-term ozone inhalation promotes a shift in brainstem and hypothalamic gene expression that is dependent on the presence of circulating adrenal-derived stress hormones.

ORGANISM(S): Rattus norvegicus

PROVIDER: GSE133293 | GEO | 2019/12/31

REPOSITORIES: GEO

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