1. Tracking the invasion of breast cancer cells in paper-based 3D cultures by OCT motility analysis

    Tracking the invasion of breast cancer cells in paper-based 3D cultures by OCT motility analysis

    3D paper-based cultures (PBCs) are easy-to-use and provide a biologically representative microenvironment. By stacking a sheet of cell-laden paper below sheets containing cell-free hydrogel, we form an assay capable of segmenting cells by the distance they invaded from the original cell-seeded layer. These invasion assays are limited to end-point analyses with fluorescence-based readouts due to the highly scattering nature of the paper scaffolds. Here we demonstrate that optical coherence tomography (OCT) can distinguish living cells from the surrounding extracellular matrix (ECM) or paper fibers based upon their intracellular motility amplitude ( M ). M is computed from fluctuation statistics of the sample ...

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