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Published on: December 15, 2010
Ultrasound-targeted microbubble destruction enhances RSL3-induced ferroptosis in anaplastic thyroid carcinoma
Xinyao Liu1, Liangkai Wang1, Xinyi Liu1
1Department of Ultrasound, China-Japan Friendship Hospital, Beijing 100029, China.
Abstract:
Anaplastic thyroid carcinoma (ATC) is a highly aggressive malignancy with limited effective therapies. Ferroptosis, a form of programmed cell death, is closely associated with thyroid cancer prognosis and represents a potential therapeutic target. This study evaluated the antitumor effects of ultrasound-targeted microbubble (MB) destruction (UTMD)-mediated RAS-selective lethal 3 (RSL3) delivery to induce ferroptosis in ATC. MBs loaded with ferroptosis inducer RSL3 were synthesized and intravenously administered in a nude mouse ATC model, followed by localized ultrasound irradiation to enable targeted intratumoral drug release. RSL3-MBs exhibited uniform particle size, good biocompatibility, and excellent contrast performance. The combination of RSL3-MBs with UTMD significantly inhibited the growth of ATC without evident systemic toxicity. This strategy was shown to be more effective than the delivery methods involving either RSL3 solution or RSL3-MBs alone. These findings support UTMD-mediated RSL3 delivery as an effective approach to enhance ferroptosis-based therapy for ATC.
Insights
This study shows ultrasound-targeted microbubble destruction effectively delivers ferroptosis inducer RSL3 to treat anaplastic thyroid carcinoma (ATC) in mice. This targeted approach significantly inhibited tumor growth with minimal toxicity, offering a promising new therapy for aggressive thyroid cancer.
Area of Science:
- Oncology
- Biomedical Engineering
- Molecular Biology
Background:
- Anaplastic thyroid carcinoma (ATC) is an aggressive cancer with few treatment options.
- Ferroptosis, a cell death pathway, is linked to thyroid cancer and presents a therapeutic target.
- Targeted drug delivery systems are needed to enhance treatment efficacy for ATC.
Purpose of the Study:
- To evaluate ultrasound-targeted microbubble destruction (UTMD)-mediated delivery of RSL3 to induce ferroptosis in ATC.
- To assess the antitumor efficacy and safety of this novel therapeutic strategy in a preclinical model.
Main Methods:
- Synthesis of RSL3-loaded microbubbles (MBs).
- Intravenous administration of RSL3-MBs in a nude mouse model of ATC.
- Application of localized ultrasound irradiation to trigger targeted drug release.
- Evaluation of tumor growth inhibition and systemic toxicity.
Main Results:
- RSL3-MBs demonstrated favorable characteristics, including uniform size and good biocompatibility.
- Combined RSL3-MBs and UTMD significantly suppressed ATC tumor growth.
- The UTMD-mediated delivery showed superior efficacy compared to RSL3 solution or RSL3-MBs alone.
- No significant systemic toxicity was observed.
Conclusions:
- UTMD-mediated RSL3 delivery is an effective strategy for inducing ferroptosis in ATC.
- This approach enhances the therapeutic potential of ferroptosis-based treatments for aggressive thyroid cancer.
- The findings support further development of this targeted therapy for clinical application.
