TOP2B: The Hidden Enzyme Behind Cancer-Causing DNA Breaks

A new Nature Communications study is reshaping how scientists think about the origins of cancer-causing mutations. The research focuses on a DNA-managing enzyme called TOP2B (topoisomerase IIβ)—an essential “stress-relief” protein that helps untangle DNA so genes can be switched on. Until now, TOP2B was mostly viewed as a helpful regulator of transcription. But this new […]

TopoGEN: Making Tomorrow’s Cancer Breakthroughs Possible Today

A groundbreaking new Nature study reveals that cancer cells use specialized genomic “retention elements” to preserve and propagate extrachromosomal circular DNA (ecDNA)—a major engine of oncogene amplification and tumor evolution. These circular ecDNAs, which lack centromeres and segregate randomly, should theoretically be lost at each cell division. Yet this work shows that cancer cells have evolved a mechanism […]

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