miR-200c-141 induces a hybrid E/M state and promotes collective cell migration in MDA-MB-231 cells

Area of Science:

• Molecular Biology
• Cancer Research
• Cell Biology

Background:

• The microRNA-200 (miR-200) family is known to suppress epithelial-to-mesenchymal transition (EMT).
• Recent studies indicate miR-200 can paradoxically promote cancer progression in certain contexts.
• The hybrid epithelial/mesenchymal (E/M) state is linked to increased cancer malignancy.

Purpose of the Study:

• To investigate the role of the miR-200 family in inducing a hybrid E/M state.
• To examine the effect of miR-200 family members on mesenchymal MDA-MB-231 cells.
• To understand the contribution of miR-200 to cancer malignancy.

Main Methods:

• Induction of miR-200c-141 cluster in mesenchymal cells.
• Analysis of epithelial and mesenchymal gene expression.
• Assessment of cell-cell junction formation and cell migration.

Main Results:

• Induction of miR-200c-141 led to epithelial gene expression and cell-cell junction formation.
• Mesenchymal markers were retained in cells induced with miR-200c-141.
• miR-200c-141 induction promoted collective migration with F-actin cable formation.

Conclusions:

• The miR-200 family can induce a hybrid E/M state in mesenchymal cancer cells.
• This hybrid E/M state is associated with enhanced collective cell migration.
• The miR-200 family's role in cancer progression is complex and context-dependent.