E2F1 activates breast stromal fibroblasts and promotes their paracrine pro-carcinogenic effects.

ABSTRACT: Breast cancers (BC) are complex neo-organs composed of neoplastic as well as non-carcinogenic cells, in addition to a dynamic extracellular matrix. Active cancer-associated fibroblasts (CAFs) play major roles in the development and spread of breast cancers, through paracrine signaling, which are under the control of several transcription regulators. In the present study, we investigated the role of the transcription factor E2F1 in the active status of CAFs. We have shown that CAFs express higher levels of E2F1 compared to their adjacent tumor counterpart fibroblasts (TCFs). Importantly, E2F1 upregulation by ectopic expression transactivated quiescent breast stromal fibroblasts and promoted their paracrine pro-carcinogenic effects. Indeed, E2F1-expressing fibroblasts were more efficient tha

SUBMITTER: Al-Kharashi LA 

PROVIDER: S-EPMC11794577 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature