Nrf2/cyclooxygenase 2 signaling in Cr(VI)-induced carcinogenesis.

ABSTRACT: Long-term exposure to hexavalent chromium [Cr(VI)] has been linked to lung cancer, and cyclooxygenase-2 (COX-2) is a well-known inflammatory factor. However, the role and mechanism of COX-2 in Cr(VI)-induced carcinogenesis are not clear yet. To address this question, we employed a mouse model exposed to Cr(VI) through intranasal instillation of particulate zinc chromate (ZnCrO₄) for 12 weeks. Metabolomics and RNA-seq assays revealed enhanced activity of the arachidonic acid (AA)/eicosanoid metabolism pathway in lung tissues from mice exposed to Cr(VI). COX-2, the key enzyme of the AA/eicosanoid pathway, was significantly upregulated in Cr(VI)-exposed lung tissues, as well as in the Cr(VI)-induced transformed (Cr-T) cells compared to parental BEAS-2B (B2B) cells. We then employed

SUBMITTER: Zhao L 

PROVIDER: S-EPMC12439351 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature