The POLR3A/ARG2/spermine axis drives tamoxifen resistance in breast cancer
This study identifies the POLR3A/ARG2/spermine axis as a critical driver of tamoxifen resistance in ERα+ breast cancer, demonstrating that pharmacological inhibition of spermine synthesis with DFMO can re-sensitize resistant tumors to tamoxifen by restoring Caspase2-mediated apoptosis.