Investigating the effects of miR-526b and miR-655 on doxorubicin sensitivity in breast cancer.

ABSTRACT: Doxorubicin is an effective treatment for breast cancer, but drug resistance poses a significant challenge. Emerging regulators of drug resistance include microRNAs, small non-coding RNAs. Two miRNAs, miR-526b and miR-655, promote aggressive breast cancer phenotypes like cell proliferation, cancer stem cell upregulation, altered response to oxidative and metabolic stress and help tumor metastasis by activating COX-2/EP4/PI3K pathways. However, their impact on the effects of chemotherapeutic treatments remains unexplored. This study investigates the impact of overexpressing miR-526b and miR-655 on doxorubicin responses in breast cancer, focusing on pro-survival, apoptotic, and DNA-damage response pathways. We confirm the role of PI3K/Akt signalling in promoting cell survival and resistance

SUBMITTER: Opperman RM 

PROVIDER: S-EPMC12480915 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature