MicroRNA-200c Promotes Epithelial-Mesenchymal Transition of Lens Epithelial Cells by Activating the Yes-Associated...

Area of Science:

• Ophthalmology
• Molecular Biology
• Cell Biology

Background:

• Posterior Capsule Opacification (PCO) is a common complication after cataract surgery.
• Epithelial-mesenchymal transition (EMT) of lens epithelial cells (LECs) plays a crucial role in PCO development.
• Understanding the molecular mechanisms regulating EMT in PCO is essential for developing effective treatments.

Purpose of the Study:

• To investigate the role of MicroRNA 200c (miR-200c) in the epithelial-mesenchymal transition (EMT) of lens epithelial cells (LECs).
• To elucidate the underlying mechanism by which miR-200c influences EMT in the context of Posterior Capsule Opacification (PCO).

Main Methods:

• Human LECs were treated with TGFβ2 to induce EMT, modeling PCO.
• Real-time quantitative PCR (qPCR) and Western blot analysis were used to assess mRNA and protein expression levels of miR-200c and EMT markers.
• Cell migration was evaluated using the scratch test, and YAP signaling pathway activation was investigated.

Main Results:

• miR-200c expression was upregulated in TGFβ2-induced EMT of LECs.
• Overexpression of miR-200c accelerated cell migration and mesenchymal transition, while inhibition suppressed TGFβ2-mediated EMT.
• miR-200c positively regulated YAP signaling, leading to increased YAP levels and subsequent upregulation of EMT markers like FN, vimentin, and SNAIL.

Conclusions:

• MiR-200c promotes EMT and migration in LECs by activating the YAP signaling pathway.
• MiR-200c holds potential as a biomarker for the diagnosis or treatment of PCO.