LncRNA modulates Hippo-YAP signaling to reprogram iron metabolism

Area of Science:

• Oncology
• Molecular Biology
• Gene Regulation

Background:

• Iron metabolism dysregulation is linked to cancer development, but mechanisms are unclear.
• Long noncoding RNAs (lncRNAs) are increasingly recognized for their roles in metabolic processes and signaling pathways.

Purpose of the Study:

• To elucidate the role of iron-regulated lncRNAs in cancer.
• To identify novel regulators connecting the Hippo pathway and iron metabolism.

Main Methods:

• Investigated the function of LncRIM (LncRNA Related to Iron Metabolism).
• Analyzed the interaction between LncRIM, NF2, and the Hippo pathway components (LATS1, YAP).
• Assessed the impact on iron transporters (DMT1, TFR1) and clinical relevance in breast cancer.

Main Results:

• LncRIM directly binds NF2, inhibiting NF2-LATS1 interaction and activating YAP.
• Activated YAP increases intracellular iron via DMT1 and TFR1.
• The LncRIM-NF2 axis regulates iron metabolism dependent on the Hippo pathway.
• High LncRIM expression correlates with poor patient survival in breast cancer.

Conclusions:

• LncRIM acts as a crucial link between the Hippo pathway and iron metabolism, independent of IRP2.
• The LncRIM-NF2 axis promotes breast cancer by creating a feedback loop that hyperactivates YAP and dysregulates iron.
• LncRIM shows potential as a biomarker and therapeutic target for breast cancer.