An optical-manipulation technique for cells in physiological flows
We have developed a technique to manipulate human red blood cells (RBCs) in hydrodynamic flows. This method applies optical tweezers to trap and move microbead-attached RBCs in a liquid medium at various speeds, while it significantly minimizes laser heating and photon-induced stress for normal operation with laser-trapped cells. Computational fluid dynamics is applied to simulate flow-induced shear stress over the cell membrane and to correlate quantitatively the forces with the cell deformations. RBCs can be manipulated under physiological conditions by this approach, which may open an avenue to design principles for the next generation of cell sorting and delivery.
KeywordsOptical tweezers Cell–flow interaction Red blood cell Cell sorting Flow–structure interaction
The work is partly supported by the project funding (BB/D014786/1), which is co-funded by BBSCR and EPSRC (Life Science Interface Programme).
- 6.Liu, Y., Cheng, D.K., Sonek, J.G., Berns, M.W., Chapman, C.F., Tromberg, B.J.: Evidence for localized cell heating induced by infrared optical tweezers. Biophys. J. 68, 2137–1244 (1995)Google Scholar
- 9.Sheetz, M.P.: Laser Tweezers in Cell Biology. Academic Press, New York (1998)Google Scholar