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. 2019 Jul 8;9:9885. doi: 10.1038/s41598-019-46086-y

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Diagrams (top) and representative microscopic pictures (bottom) of B-cell-mesenchymal stromal cell adhesion measurements. The methodology used to study nascent adhesion is separated into distinct phases. (a) The B-cell is optically trapped and located toward mesenchymal stromal cell; (b) B-cell is seeded in the central part of stromal cell and held in optical trapp for a determined time; (c) an attempt to detach the B-cell from stromal cell is performed to test wheather adhesive interactions are established; (d) the B-cell is moved away from stromal cell after cell-to-cell contact was broken at a defined time point. The microscopic images represents testing of single primary non-Hodgkin lymphoma cell adhesion to MSc. The optical trap (red) was used to bring the lymphoma cell into contact with MSC, maintain cell-to-cell interactions and finally testing the establishment of cell adhesion at a defined time point. The scalebar is set at 15 μm.