Sulforaphane inhibits thyroid cancer cell growth and invasiveness through the reactive oxygen species-dependent...

Area of Science:

• Oncology
• Molecular Biology
• Biochemistry

Background:

• Thyroid cancer is a prevalent malignancy with limited therapeutic options.
• Sulforaphane (SFN), a natural compound from broccoli, exhibits antitumor properties in various cancers.
• The therapeutic potential of SFN in thyroid cancer is largely unexplored.

Purpose of the Study:

• To investigate the antitumor effects of SFN on thyroid cancer.
• To elucidate the underlying molecular mechanisms of SFN's action in thyroid cancer.
• To evaluate the efficacy of SFN in preclinical models of thyroid cancer.

Main Methods:

• In vitro studies using thyroid cancer cell lines to assess proliferation, cell cycle, apoptosis, migration, and invasion.
• In vivo studies using a xenograft mouse model to evaluate tumor growth inhibition.
• Western blot analysis and signaling pathway assays to explore molecular mechanisms.

Main Results:

• SFN significantly inhibited thyroid cancer cell proliferation, induced G2/M cell cycle arrest, and promoted apoptosis.
• SFN suppressed thyroid cancer cell migration and invasion by inhibiting epithelial-mesenchymal transition (EMT) and downregulating Slug, Twist, MMP-2, and MMP-9.
• SFN repressed Akt phosphorylation, enhanced p21 expression via Erk and p38 activation, and promoted ROS-dependent mitochondrial apoptosis.
• SFN significantly inhibited xenograft tumor growth in mice without adverse effects on body weight or liver function.

Conclusions:

• SFN demonstrates significant antitumor activity against thyroid cancer in vitro and in vivo.
• SFN exerts its effects by modulating key signaling pathways involved in cell cycle, apoptosis, and EMT.
• SFN represents a promising natural compound for the development of novel thyroid cancer therapies.