Topological structure of rat mesenteric microvessel networks

Area of Science:

• Physiology
• Biophysics
• Network Science

Background:

• Understanding microvascular network topology is crucial for physiological studies.
• Previous analyses often relied on simplified branching models.

Purpose of the Study:

• To characterize the topological structure of rat mesenteric microvessel networks.
• To compare network topology with random branching models.

Main Methods:

• Intravital video- and photomicroscopy of 1303 vessel segments in rat mesenteric networks.
• Topological analysis using the Horton-Strahler technique and a novel generation scheme.
• Comparison of empirical network data with random branching network models.

Main Results:

• A new generation scheme accurately reflects network topology, outperforming Horton's branching ratio.
• Mesenteric networks exhibit dichotomous branching, neither strictly symmetric nor asymmetric.
• Network structure transitions at a specific generation level, differentiating proximal and distal portions.

Conclusions:

• The proposed generation scheme offers a more precise topological characterization of microvascular networks.
• Rat mesenteric microvascular networks display complex branching patterns with a notable structural transition.
• Findings provide insights into the developmental or functional organization of microvascular systems.