Development of a customizable vascularization strategy using a modular microfluidic platform for fibroblast-free...

Area of Science:

• Biomedical Engineering
• Vascular Biology
• Microfluidics

Background:

• Microphysiological systems commonly use fibroblast-endothelial cell co-cultures for angiogenesis.
• Fibroblast-dependent co-culture limits physiological relevance for fibroblast-poor organs like the brain or pancreas.
• A need exists for methods enabling fibroblast-free vascularization in organ-specific models.

Purpose of the Study:

• To develop a modular microfluidic platform for controlled co-culture and disconnection of fibroblast and endothelial cells.
• To create fibroblast-free capillary networks in microphysiological systems.
• To investigate the stability and reactivation of preformed capillary networks after fibroblast removal.

Main Methods:

• Development of a modular microfluidic platform with reversible connections for cell modules.
• Co-culture of endothelial cells and fibroblasts, followed by module disconnection.
• Analysis of vascular morphogenesis, capillary network stability, and angiogenic activity under varying conditions.

Main Results:

• The modular platform enabled promotion of angiogenesis when connected and preparation of fibroblast-free vascularized modules upon disconnection.
• Preformed capillary networks remained stable for up to 2 days after module disconnection.
• Angiogenic activity was reactivated upon reconnection of the modules after a 2-day disconnection period.

Conclusions:

• The developed modular microfluidic platform overcomes limitations of conventional co-culture for organ-specific fibroblast-free vascularization.
• This approach supports the creation and maintenance of stable, fibroblast-free capillary networks.
• The platform provides a foundation for studying interactions between preformed vascular networks and other tissues/organs.