Dresden 2020 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 10: Poster III

BP 10.22: Poster

Montag, 16. März 2020, 17:30–19:30, P2/3OG

Using real-time fluorescence and deformability cytometry and deep learning to transfer molecular specificity to label-free sorting — •Ahmad Ahsan Nawaz1, Marta Urbanska1,2, Maik Herbig1, Martin Kraeter1, Marketa Kubankova1, Salvatore Girardo1, Angela Jacobi1, and Jochen Guck11Max Planck Institute for the Science of Light, Erlangen — 2Biotec, Technische Universität Dresden

The identification and separation of specific cells from heterogeneous populations is an essential prerequisite for further analysis or use. Conventional passive and active separation approaches rely on fluorescent or magnetic tags introduced to the cells of interest through molecular markers. Such labeling is time- and cost-intensive, can alter cellular properties, and might be incompatible with subsequent use, for example, in transplantation. Alternative label-free approaches utilizing morphological or mechanical features are attractive, but lack molecular specificity. Here we combine image-based real-time fluorescence and deformability cytometry (RT-FDC) with downstream cell sorting using standing surface acoustic waves (SSAW). We demonstrate basic sorting capabilities of the device by separating cell mimics and blood cell types based on fluorescence as well as deformability and other image parameters. In addition, the classification of blood cells using established fluorescence-based markers provides hundreds of thousands of labeled cell images used to train a deep neural network. The trained algorithm is then used to identify and sort unlabeled blood cells. This approach transfers molecular specificity into label-free sorting.

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