Hypoxia promotes thyroid cancer progression through HIF1α/FGF11 feedback loop

Area of Science:

• Oncology
• Molecular Biology
• Cell Biology

Background:

• Hypoxia is a key driver of thyroid cancer metastasis and recurrence.
• The precise molecular mechanisms linking hypoxia to thyroid cancer progression are not fully understood.

Purpose of the Study:

• To investigate the molecular targets of hypoxia in thyroid cancer.
• To elucidate the role of fibroblast growth factor 11 (FGF11) in hypoxia-driven thyroid cancer progression.

Main Methods:

• Construction of a hypoxia model using thyroid cancer cells.
• Sequencing to identify hypoxia-responsive targets.
• In vitro cell models to study the function and mechanism of FGF11.
• FGF11 knockdown experiments.
• Analysis of HIF1α stability.

Main Results:

• Fibroblast growth factor 11 (FGF11) was found to be upregulated in hypoxic thyroid cancer cells and tissues.
• Knockdown of FGF11 inhibited hypoxia-induced proliferation, migration, and invasion of tumor cells.
• FGF11 was shown to enhance the stability of HIF1α by inhibiting its degradation.
• A positive feedback loop between FGF11 and HIF1α was identified under hypoxic conditions.

Conclusions:

• FGF11 plays a critical role in promoting thyroid cancer growth and metastasis under hypoxic conditions.
• FGF11 stabilizes HIF1α, contributing to a positive feedback loop that fuels tumor progression.
• Targeting FGF11 may represent a novel therapeutic strategy for managing metastatic thyroid cancer.