Metal organic framework-based variable-size nanoparticles for tumor microenvironment-responsive drug delivery.

Area of Science:

• Biomedical Engineering
• Materials Science
• Nanotechnology

Background:

• Single-sized nanoparticles (NPs) face limitations in tumor treatment due to poor blood circulation and accumulation.
• NP size critically affects clearance, tumor penetration, and systemic toxicity, necessitating novel approaches.

Purpose of the Study:

• To introduce and review variable-size nanoparticles (NPs) based on metal-organic frameworks (MOFs) for improved tumor therapy.
• To explore the advantages and mechanisms of MOF-based NPs that adapt their size within the tumor microenvironment (TME).

Main Methods:

• Categorization of MOF NPs based on size variation.
• Analysis of NP size conversion mechanisms in response to TME characteristics.
• Review of studies demonstrating MOF NP performance in anti-tumor drug delivery.

Main Results:

• Variable-size MOF NPs enhance blood circulation time and tumor accumulation.
• Size-adaptive NPs overcome the limitations of fixed-size nanoparticles.
• MOF-based variable-size NPs show potential for targeted anti-tumor drug delivery.

Conclusions:

• MOF-based variable-size NPs offer a promising strategy for overcoming current nanocarrier limitations in cancer therapy.
• Further research into the potential and challenges of these adaptable NPs is warranted for multimodal combination therapy.