Fiber-based fluorescence lifetime imaging of recellularization processes on vascular tissue constructs

Alfonso-Garcia A1, Shklover J1, Sherlock BE1, Panitch A1, Griffiths LG2, Marcu L1
Source: Other
Publication Date: (2018)
Issue: 9: e201700391
Research Area:
Basic Research
Cells used in publication:
Endothelial, aortic, human (HAEC)
Species: human
Tissue Origin: aortic


New techniques able to monitor the maturation of tissue engineered constructs over time are needed for a more efficient control of developmental parameters. Here, a label-free fluorescence lifetime imaging (FLIm) approach implemented through a single fiber-optic interface is reported for nondestructive in situ assessment of vascular biomaterials. Recellularization processes of antigen removed bovine pericardium scaffolds with endothelial cells and mesenchymal stem cells were evaluated on the serous and the fibrous sides of the scaffolds, 2 distinct extracellular matrix niches, over the course of a 7 day culture period. Results indicated that fluorescence lifetime successfully report cell presence resolved from extracellular matrix fluorescence. The recellularization process was more rapid on the serous side than on the fibrous side for both cell types, and endothelial cells expanded faster than mesenchymal stem cells on antigen-removed bovine pericardium. Fiber-based FLIm has the potential to become a nondestructive tool for the assessment of tissue maturation by allowing in situ imaging of intraluminal vascular biomaterials