Finally, a new cuproptosis-OXPHOS prognostic signature (CNN2, ATP6V0E1, PSMD6, CCDC25, IGFBP2, MT1E, and RPS4Y1) was constructed for the prediction of the prognosis.
Cuproptosis-related genes were manually curated, and differentially expressed cuproptosis-related genes (DECuGs) were identified.Then, the 16 DECuGs were obtained by the intersection of the 5018 DEGs and 63 cuproptosis-related genes.
Cuproptosis-related gene sets were obtained from a previous study [9] and combined with the Molecular Signature Database (MsigDB) v7.0 database (http://www.gsea-msigdb.org/gsea/msigdb/, GOBP_CELLULAR_COPPER_ION_HOMEOSTASIS, GOBP_CELLULAR_RESPONSE_TO_COPPER_ION).
The details of ninety-six candidate cuproptosis-related genes involved in the copper homeostasis regulatory pathway, copper metabolism diseases, mitochondrial respiratory, and iron-sulfur cluster proteins were exhibited in聽Table S1.
It was found that among multiple MT subtypes,聽MT1E聽was significantly upregulated in transcription after copper treatment, and its expression change can be used as an indicator of intracellular copper ion variation.