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Updated: Mar 15, 2026
Spontaneous Murine Model of Anaplastic Thyroid Cancer
Published on: February 3, 2023
The Role of Notch1 Signaling in Anaplastic Thyroid Carcinoma
Hyeon Jin Kim1, Min-Jung Kim1, Areumnuri Kim1
1Laboratory of Radiation Pathology, Korea Cancer Center Hospital, Seoul, Korea.
Purpose:
The Notch signaling pathway is widely expressed in normal, reactive, and neoplastic tissues; however, its role in thyroid tissues has not been fully elucidated. Therefore, this study was conducted to characterize the expression of the Notch signaling pathway in papillary thyroid cancer (PTC) cells and anaplastic thyroid cancer (ATC) cells.
Materials And Methods:
Expression of activated Notch1 in ATC and PTC paraffin-embedded tissues was determined by immunohistochemistry. The small interfering RNA techniquewas employed to knock down Notch1 expression in ATC and PTC cell lines.
Results:
The expression of activated Notch1 was higher in ATC cases than in PTC cases. Inhibition of Notch1 significantly reduced proliferation and migration of ATC cells, but not PTC cells. In addition, inhibition of Notch1 in ATC cells significantly reduced the expression of key markers of epithelial-mesenchymal transition and cancer stem cells. Conversely, changes in the expression of these proteins were not observed in PTC cells.
Conclusion:
The results of this study suggest that Notch1 expression plays different roles in tumor progression in ATC and PTC cells. We also found that Notch1 expression was significantly related to the highly invasive or proliferative activity of ATC cells.
Insights
Notch1 signaling drives anaplastic thyroid cancer (ATC) progression and metastasis, unlike in papillary thyroid cancer (PTC). Inhibiting Notch1 reduced ATC cell proliferation and migration, highlighting its therapeutic potential in aggressive thyroid cancers.
Area of Science:
- Molecular Biology
- Oncology
- Cell Signaling
Background:
- The Notch signaling pathway is crucial in various tissues, but its function in thyroid cancer remains unclear.
- Understanding Notch1's role is vital for differentiating between papillary thyroid cancer (PTC) and anaplastic thyroid cancer (ATC).
Purpose of the Study:
- To investigate Notch signaling pathway expression in papillary thyroid cancer (PTC) and anaplastic thyroid cancer (ATC) cells.
- To characterize the specific role of Notch1 in thyroid cancer progression.
Main Methods:
- Immunohistochemistry used to detect activated Notch1 expression in PTC and ATC tissues.
- Small interfering RNA (siRNA) employed to inhibit Notch1 in both ATC and PTC cell lines.
Main Results:
- Activated Notch1 expression was significantly higher in ATC compared to PTC.
- Notch1 inhibition reduced proliferation and migration in ATC cells, but not PTC cells.
- Notch1 inhibition in ATC cells decreased epithelial-mesenchymal transition and cancer stem cell markers.
Conclusions:
- Notch1 plays distinct roles in the tumor progression of ATC and PTC.
- Notch1 expression correlates with invasive and proliferative activity in ATC, suggesting it as a potential therapeutic target.
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