A Multifunctional Hydrogel Delivers Gold Compound and Inhibits Human Lung Cancer Xenograft

Area of Science:

• Biomaterials Science
• Drug Delivery Systems
• Cancer Therapeutics

Background:

• Interpenetrating network systems (IPNs) composed of polyethylene glycol (PEG)-diacrylate and modified gelatin are biocompatible hydrogels for drug delivery.
• Gold(III) porphyrin (AuP) is a promising anticancer agent for systemic administration.

Purpose of the Study:

• To develop a novel formulation for local delivery of AuP using an IPN hydrogel.
• To evaluate the efficacy and safety of AuP-loaded IPN for lung cancer treatment.

Main Methods:

• Optimization and synthesis of AuP-loaded IPN hydrogel.
• In vitro drug release kinetics and cytotoxicity assays against human lung cancer cell lines.
• In vivo antitumor activity assessment in lung cancer-bearing nude mice, including tumor growth inhibition and angiogenesis evaluation.

Main Results:

• AuP release from the IPN hydrogel followed first-order kinetics in vitro.
• AuP-loaded IPN exhibited enhanced cytotoxicity against lung cancer cells compared to the IPN alone.
• AuP-loaded IPN significantly inhibited tumor growth and reduced angiogenesis in vivo.
• No systemic toxicity was observed in any treatment group.

Conclusions:

• AuP-loaded IPN hydrogel offers an improved formulation for local tumor inhibition, complementing surgical interventions.
• This novel hydrogel system demonstrates potential for localized anticancer therapy with a favorable safety profile.