Sustained Drug Release from Dual-Responsive Hydrogels for Local Cancer Chemo-Photothermal Therapy

Area of Science:

• Biomaterials Science
• Nanotechnology
• Cancer Therapy

Background:

• Hydrogels are effective carriers for localized drug delivery to tumors, enabling prolonged release and targeted cancer cell treatment.
• Developing advanced drug delivery systems is crucial for enhancing therapeutic efficacy and minimizing side effects in cancer treatment.

Purpose of the Study:

• To investigate a novel dual-responsive hydrogel system for enhanced nanomedicine delivery.
• To evaluate the drug release kinetics and local antitumor efficacy of SN-38-cholesterol nanoparticles (SN-38-chol NPs) within polydopamine nanoparticles (PDA NPs)/poly(n-isopropylacrylamide) (pNIPAM) hydrogels.

Main Methods:

• Fabrication of a dual-responsive hydrogel combining thermosensitive pNIPAM with NIR-responsive PDA NPs.
• Incorporation of SN-38-chol NPs into the hydrogel for improved drug release dynamics.
• Assessment of drug release profiles under varying temperature and NIR light conditions, followed by in vivo antitumor efficacy studies.

Main Results:

• The developed hydrogel system demonstrated a drug release cycle exceeding three weeks.
• The hydrogel exhibited controlled release sensitive to both temperature and near-infrared (NIR) light.
• In vivo studies showed significant tumor growth inhibition following photothermal treatment induced by 808 nm NIR light.

Conclusions:

• The SN-38-chol NPs and PDA NPs/pNIPAM hydrogel system is a promising platform for chemo-phototherapy.
• This dual-responsive hydrogel holds potential for diverse applications including malignant wound treatment, post-surgery healing, and direct tumor therapy.