The development of tumour vascular networks

Area of Science:

• Oncology
• Biophysics
• Network Science

Background:

• Solid tumor growth depends on vascular networks for oxygen and nutrients.
• Tumor vasculature comprises endothelial cell-lined angiogenesis and cancer cell-lined vasculogenic mimicry (VM).

Purpose of the Study:

• To quantitatively compare the developmental properties of angiogenesis and VM networks.
• To identify novel network parameters and understand their impact on tumor vascularization.

Main Methods:

• In vitro assays using breast and pancreatic cancer cell lines to model angiogenesis and VM.
• Live cell imaging and automated extraction of large-scale network parameters.

Main Results:

• Both angiogenesis and VM networks reduce path length over time.
• Endothelial cells in angiogenesis increase clustering coefficients, maintaining small-world properties.
• VM networks enhance efficiency by reducing complexity (edges, vertices) and increasing edge length, exhibiting properties similar to road traffic networks and the Braess paradox.

Conclusions:

• Angiogenesis and VM exhibit distinct developmental strategies for network formation.
• VM networks demonstrate an optimized, simplified structure for efficiency.
• This quantitative framework can aid in evaluating anti-cancer and anti-vascular therapies.