Nanoscale drug delivery systems for enhanced drug penetration into solid tumors: current progress and opportunities

Area of Science:

• Nanomedicine
• Materials Science
• Oncology

Background:

• Poor drug penetration into solid tumors limits anticancer efficacy for both small molecules and nanoparticles.
• Nanoparticles offer potential for cancer treatment via drug delivery and imaging, utilizing the enhanced permeability and retention (EPR) effect for tumor accumulation.
• Despite potential, nanoparticle diffusion into tumors after vascular accumulation requires further study and improvement.

Purpose of the Study:

• To review the challenges and complexities of nanoscale therapy penetration into solid tumors.
• To summarize current methods for studying nanoparticle penetration in malignant tumors.
• To highlight key nanoparticle design parameters for improved tumor penetration.

Main Methods:

• Literature review of existing research on nanoparticle penetration in solid tumors.
• Analysis of methods used to study nanoparticle diffusion and accumulation.
• Synthesis of findings on nanoparticle design influencing tumor penetration.

Main Results:

• Nanoparticle penetration is governed by complex factors beyond passive accumulation.
• Current methods for studying penetration are described and recent works summarized.
• Key design parameters influencing tumor penetration are identified.

Conclusions:

• Improving nanoparticle penetration is crucial for enhancing cancer therapy efficacy.
• Nanoparticle design must consider factors that promote diffusion beyond the tumor vasculature.
• Further research into nanoparticle design and penetration mechanisms is essential for advancing cancer treatment.