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• W4281261520 endingPage "107103" @default.
• W4281261520 startingPage "107103" @default.
• W4281261520 abstract "Patterned microstructures are commonly used for investigating cells proliferation, guiding cell fate and promoting adhesion and differentiation. Analyzing the behavior of cells layered onto functionalized micropatterned substrates ideally requires large Field of View (FoV), depth of focus, and spatial resolution. Managing the trade-off among these features is pretentious with standard microscopy. Furthermore, patterned substrates have often very complex geometries. Thus, optical systems should be able to get rid of artefacts due to light scattering/diffraction from both the cells’ layer and the underneath structure whose pitches typically have dimensions at the visible wavelength scale. Moreover, the layers are seen as coupled by transmission imaging systems. Decoupling them is pivotal to understand their own properties and related dependences and for interpreting how the structure geometry, point-by-point, addresses the behavior and the functions of the living cells. Here we show the successful use of Fourier Ptychographic Microscopy (FPM) for investigating cell-substrate interaction on micropatterned substrates, solving in full the issue of the layers decoupling. In fact, we demonstrate that it is possible to extract paired but separate clear images of both layers, by computationally decoupling them in FPM reconstruction. In order to test the proposed modality, we chose fibroblast cells in adhesion on a complex substrate consisting of irregular micro-wrinkles on a thin layer of Au. We rely on a numerical multi-look approach, which is capable of restoring quantitative phase-contrast maps of the label-free cells unaffected by artefacts, over a 3.3 mm2 FoV with 0.5 µm resolution. Moreover, from one single FPM map, we demonstrate separate extraction of cells’ morphometry and the underneath wrinkled patterns. Two parameters characterizing the cell-substrate interaction are defined, showing correlation that paves the way to future exploitations of this processing protocol in the fields of mechanobiology and cells and tissue engineering." @default.
• W4281261520 created "2022-05-23" @default.
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• W4281261520 date "2022-09-01" @default.
• W4281261520 modified "2023-09-30" @default.
• W4281261520 title "Fourier ptychographic microscope allows multi-scale monitoring of cells layout onto micropatterned substrates" @default.
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• W4281261520 doi "https://doi.org/10.1016/j.optlaseng.2022.107103" @default.
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