OVCAR-4 Cells

OVCAR-4 is a human ovarian carcinoma cell line derived from an adult patient with epithelial ovarian cancer who had previously undergone combination chemotherapy. It belongs to a panel of ovarian cancer cell lines established to model clinical drug resistance and tumor heterogeneity. As part of this series, OVCAR-4 reflects characteristics of tumors exposed to chemotherapeutic agents such as cisplatin and doxorubicin, making it particularly valuable for studying mechanisms of chemotherapy response and resistance.

Molecular analyses have demonstrated that OVCAR-4 exhibits detectable expression of metallothionein mRNA, a protein involved in metal ion binding and cellular detoxification pathways. Notably, exposure to cisplatin induces only a modest increase in metallothionein expression in this cell line, suggesting that while metallothionein may contribute to cellular stress responses, it is not a primary determinant of cisplatin resistance in this model. These findings highlight the complexity of drug resistance mechanisms in ovarian cancer, where multiple pathways—including drug transport, DNA repair, and intracellular detoxification – may act in parallel.

OVCAR-4 is included in the NCI-60 cancer cell line panel and has been utilized in high-content phenotypic profiling studies. Fluorescence-based screening approaches have shown that OVCAR-4 exhibits distinct intracellular staining patterns and intensity kinetics when exposed to diverse fluorescent probes, enabling its classification alongside other ovarian cancer cell lines. These phenotypic signatures reflect underlying biochemical and morphological features, supporting the use of OVCAR-4 in systems biology, drug screening, and cancer cell lineage identification studies.