Long Noncoding RNA CTC Inhibits Proliferation and Invasion by Targeting miR-146 to Regulate KIT in Papillary Thyroid...

Area of Science:

• Molecular Biology
• Oncology
• Genetics

Background:

• Long non-coding RNAs (lncRNAs) are implicated in various diseases, but their role in papillary thyroid carcinoma (PTC) remains underexplored.
• Understanding lncRNA functions is crucial for developing novel therapeutic strategies in oncology.

Purpose of the Study:

• To investigate the biological relevance and regulatory mechanisms of lncRNAs, specifically CTC, in papillary thyroid carcinoma (PTC).
• To elucidate the molecular pathway involving CTC, microRNA-146 (miR-146), and KIT in PTC progression and chemoresistance.

Main Methods:

• In vitro and in vivo assays were employed to assess the role of CTC in PTC cell migration and invasion.
• Mechanistic studies explored the interaction between CTC, miR-146, and KIT expression.
• Quantitative analysis of CTC, miR-146, and KIT levels in clinical PTC specimens compared to normal thyroid tissues.

Main Results:

• CTC was identified as a negative regulator of PTC cell migration and invasion.
• CTC functions as a miR-146 decoy, de-repressing KIT expression.
• Downregulation of CTC and KIT, coupled with elevated miR-146, was observed in PTC tissues, correlating with disease progression.

Conclusions:

• CTC acts as a competing endogenous RNA (ceRNA) to inhibit PTC progression and chemoresistance via the miR-146/KIT axis.
• CTC represents a potential therapeutic target for suppressing PTC progression.