Cell cycle-dependent translation-mediated turnover of the long noncoding RNA Malat1.

Malat1 long noncoding RNA is degraded during early G1 phase via a translation-dependent pathway, preventing its accumulation and influencing cancer progression.

• Why it matters: Understanding Malat1 turnover is crucial because its high levels promote metastasis and poor prognosis in cancer patients, yet the mechanisms controlling its abundance are unclear.
• What they did: The study examined Malat1 dynamics across the cell cycle, revealing its cytoplasmic localization after mitosis and degradation during early G1 through a Smg1-dependent decay process involving translation.
• The result: Disruption of Malat1 decay leads to its accumulation, suggesting that cell cycle-dependent regulation of Malat1 influences cancer cell dormancy and overexpression, offering potential therapeutic insights.