Boosting Nanomedicine Efficacy with Hyperbaric Oxygen Therapy.

Area of Science:

• Oncology
• Nanomedicine
• Biomedical Engineering

Background:

• Nanomedicine leverages the enhanced permeability and retention (EPR) effect for passive tumor targeting, aiming to improve drug concentration and reduce side effects.
• Despite potential, the clinical efficacy of nanomedicine in cancer therapy remains suboptimal due to challenges in overcoming pathophysiological barriers and the hypoxic tumor microenvironment (TME).
• Developing complex, stimuli-responsive nanomedicines faces hurdles in preparation, cost, and clinical translation, necessitating practical strategies to enhance existing nanomedicines.

Purpose of the Study:

• To investigate the potential of hyperbaric oxygen (HBO) therapy as a strategy to improve the clinical therapeutic effect of nanomedicines.
• To explore the synergistic effects of combining HBO therapy with various nanomedicine-based cancer treatments, including photodynamic and photothermal therapies.
• To determine if HBO therapy can serve as a universal approach to boost nanomedicine efficacy against hypoxic solid tumors.

Main Methods:

• Building upon prior findings that HBO therapy enhances Doxil® efficacy, this study systematically investigated combinations of HBO with other nanomedicines.
• Evaluated the impact of HBO therapy on nanomedicine-mediated photodynamic therapy (PDT) and photothermal therapy (PTT) in preclinical cancer models.
• Assessed therapeutic outcomes in various tumor types, including hepatocellular carcinoma, breast cancer, and gliomas.

Main Results:

• HBO therapy was found to significantly enhance the antitumor efficacy of nanomedicine-mediated PDT and PTT across different cancer types.
• The combination therapy demonstrated improved outcomes in models of hepatocellular carcinoma, breast cancer, and gliomas.
• Results suggest that HBO therapy effectively boosts the therapeutic potential of nanomedicines in hypoxic tumor environments.

Conclusions:

• Hyperbaric oxygen (HBO) therapy presents a promising and potentially universal strategy for enhancing the clinical efficacy of nanomedicines in treating hypoxic solid tumors.
• The combination of HBO with nanomedicine-based therapies, such as PDT and PTT, offers a viable approach to overcome treatment limitations and improve patient outcomes.
• Further research into HBO therapy as an adjunct to nanomedicine holds significant potential for advancing cancer treatment paradigms.