Extravascular transport in normal and tumor tissues

Area of Science:

• Pharmacology
• Biomedical Engineering
• Oncology

Background:

• Drug delivery for cancer treatment relies on effective transport to tumor cells.
• Extravascular transport encompasses perfusion, capillary permeation, interstitial movement, and cell membrane crossing.
• Rate-limiting steps in drug uptake can differ between normal and tumor tissues.

Purpose of the Study:

• To review experimental and modeling approaches for understanding extravascular transport in cancer.
• To identify transport limitations affecting drug efficacy in cancer detection and therapy.
• To provide insights for optimizing drug dosage and scheduling.

Main Methods:

• Examination of various animal tumor models for human tumor representation.
• Discussion of mathematical modeling of extravascular transport.
• Comparison of compartmental and distributed modeling approaches.

Main Results:

• Experimental and modeling data highlight critical transport steps and potential rate-limiting factors.
• Differences in transport characteristics between normal and tumor tissues are significant.
• Both compartmental and distributed models offer valuable perspectives on drug disposition.

Conclusions:

• Optimizing drug delivery requires a thorough understanding of extravascular transport dynamics.
• Mathematical modeling, both compartmental and distributed, aids in predicting and improving drug efficacy.
• Further research into transport limitations can enhance cancer treatment strategies.