Multifunctional biomaterials that modulate oxygen levels in the tumor microenvironment

Area of Science:

• Biomaterials Science
• Oncology
• Biomedical Engineering

Background:

• Solid tumors exhibit low oxygen tension (hypoxia), leading to resistance against radiotherapy, photodynamic therapy, and chemotherapy.
• Effective cancer treatment necessitates strategies to overcome tumor hypoxia and improve therapeutic efficacy.
• Biomaterials offer a promising approach for targeted modulation of oxygen levels within tumors.

Purpose of the Study:

• To review and categorize oxygen-modulating biomaterials for cancer therapy.
• To elucidate the molecular mechanisms by which these biomaterials alter tumor oxygen levels.
• To discuss the potential applications of these biomaterials in treating hypoxic tumors.

Main Methods:

• Literature review of oxygen-modulating biomaterials.
• Categorization based on oxygen modulation function: carrying, generating, consuming, and circulating.
• Analysis of molecular mechanisms and therapeutic applications.

Main Results:

• Four classes of oxygen-modulating biomaterials identified: oxygen-carrying (e.g., perfluorocarbon), oxygen-generating (e.g., MnO2), oxygen-consuming (e.g., photosensitizers), and oxygen-circulating (e.g., ENBS-B).
• These biomaterials demonstrate potential for enhancing anticancer therapeutics by addressing tumor hypoxia.
• Key molecular mechanisms for oxygen modulation and their relevance to tumor treatment are presented.

Conclusions:

• Oxygen-modulating biomaterials represent a significant advancement in overcoming tumor hypoxia.
• Targeted delivery and modulation of oxygen using biomaterials can improve the efficacy of existing cancer therapies.
• Further research into these biomaterials holds promise for developing novel and more effective anticancer treatments.