Related Experiment Video
Updated: Jul 22, 2026

Spatial Measurements of Perfusion, Interstitial Fluid Pressure and Liposomes Accumulation in Solid Tumors
Published on: August 18, 2016
Drug penetration in solid tumours
Andrew I Minchinton1, Ian F Tannock
1Department of Medical Biophysics, British Columbia Cancer Research Centre, Vancouver, Canada. aim@bccrc.ca
Abstract:
To be most effective anticancer drugs must penetrate tissue efficiently, reaching all the cancer cells that comprise the target population in a concentration sufficient to exert a therapeutic effect. Most research into the resistance of cancers to chemotherapy has concentrated on molecular mechanisms of resistance, whereas the role of limited drug distribution within tumours has been neglected. We summarize the evidence that indicates that the distribution of many anticancer drugs in tumour tissue is incomplete, and we suggest strategies that might be used either to improve drug penetration through tumour tissue or to select compounds based on their abilities to penetrate tissue, thereby increasing the therapeutic index.
Insights
Effective chemotherapy requires anticancer drugs to reach all cancer cells. This study highlights neglected issues of poor drug distribution in tumors and proposes strategies to improve drug penetration for better cancer treatment outcomes.
Area of Science:
- Oncology
- Pharmacology
- Cancer Research
Background:
- Chemotherapy effectiveness relies on efficient drug delivery to all cancer cells.
- Limited drug distribution within tumors is a neglected factor in cancer treatment resistance.
- Molecular mechanisms of resistance have been prioritized over drug penetration studies.
Purpose of the Study:
- To review evidence on incomplete anticancer drug distribution in tumor tissues.
- To propose strategies for enhancing drug penetration in tumors.
- To suggest selecting compounds based on tissue penetration abilities to improve therapeutic index.
Main Methods:
- Literature review and evidence synthesis on drug distribution in tumors.
- Analysis of factors affecting drug penetration in neoplastic tissues.
- Exploration of strategies to overcome drug distribution challenges.
Main Results:
- Evidence indicates that the distribution of many anticancer drugs within tumor tissue is often incomplete.
- Poor drug penetration can limit the efficacy of chemotherapy.
- Strategies to improve drug penetration may enhance therapeutic outcomes.
Conclusions:
- Improving drug penetration in tumors is crucial for effective chemotherapy.
- Developing strategies to enhance drug distribution can overcome treatment resistance.
- Selecting drugs based on penetration capabilities can increase the therapeutic index and improve patient outcomes.
More Related Videos
08:52Intravital Microscopy of Tumor-associated Vasculature Using Advanced Dorsal Skinfold Window Chambers on Transgenic Fluorescent Mice
Published on: January 19, 2018
10:26Using In Vitro Live-cell Imaging to Explore Chemotherapeutics Delivered by Lipid-based Nanoparticles
Published on: November 1, 2017
Related Concept Videos
Drug Absorption: Overview
When drugs are injected intravenously, they directly enter the systemic circulation. Alternatively, orally administered drugs navigate through the gastrointestinal (GI) tract.
Cellular Membranes and Drug Transport
Phospholipids arrange themselves into a bilayer, with hydrophilic heads oriented outward and hydrophobic tails facing inward.
Mechanisms of Drug Absorption: Paracellular, Transcellular, and Vesicular Transport
However, most drugs use the transcellular route, traversing directly through the cell membranes via two mechanisms: passive and active transport. Passive...
Carrier-Mediated Transport
Active transport involves two types of membrane-spanning transporters: uptake and efflux. Uptake transporters are expressed in the small...
Methods for Studying Drug Absorption: In situ
The Doluisio method involves perfusing a prepared segment of a rat's small intestine with a solution of radiolabeled drug and a non-absorbable marker. This helps to differentiate between absorbed and non-absorbed drug concentrations. The intestinal segment is connected at both ends using tubing and syringes,...
Bioavailability Enhancement: Drug Permeability Enhancement