2017/01/01 by Isa N. Cruz, Helen M. Coley, Holger Kramer +4 · 1 citation
Biochemistry, Genetics and Molecular Biology · Medicine · #Redox biology and oxidative stress #Clusterin in disease pathology #Cancer, Hypoxia, and Metabolism
paper · pdf · doi:10.21873/cgp.20017
openalex publication_date 2017/01/01 · openalex created_date 2017/01/06 · openalex updated_date 2026/07/31
BACKGROUND: Carboplatin and paclitaxel form the cornerstone of chemotherapy for epithelial ovarian cancer, however, drug resistance to these agents continues to present challenges. Despite extensive research, the mechanisms underlying this resistance remain unclear. MATERIALS AND METHODS: A 2D-gel proteomics method was used to analyze protein expression levels of three human ovarian cancer cell lines and five biopsy samples. Representative proteins identified were validated via western immunoblotting. Ingenuity pathway analysis revealed metabolomic pathway changes. RESULTS: A total of 189 proteins were identified with restricted criteria. Combined treatment targeting the proteasome-ubiquitin pathway resulted in re-sensitisation of drug-resistant cells. In addition, examination of five surgical biopsies of ovarian tissues revealed α-enolase (ENOA), elongation factor Tu, mitochondrial (EFTU), glyceraldehyde-3-phosphate dehydrogenase (G3P), stress-70 protein, mitochondrial (GRP75), apolipoprotein A-1 (APOA1), peroxiredoxin (PRDX2) and annexin A (ANXA) as candidate biomarkers of drug-resistant disease. CONCLUSION: Proteomics combined with pathway analysis provided information for an effective combined treatment approach overcoming drug resistance. Analysis of cell lines and tissues revealed potential prognostic biomarkers for ovarian cancer.