Experimental confirmation of tissue liquidity based on the exact solution of the Laplace equation

Details Experimental confirmation of tissue liquidity based on the exact solution of the Laplace equation Experimental confirmation of tissue liquidity based on the exact solution of the Laplace equation

2007-06-25

arxiv.org/abs/0706.3678v1

Physics

Biological Physics

4 pages, 3 figures, submitted to Phys. Rev. Lett

Scientific paper

10.1209/0295-5075/81/46003

The notion of tissue surface tension has provided a physical understanding of morphogenetic phenomena such as tissue spreading or cell sorting. The measurement of tissue surface tension so far relied on strong approximations on the geometric profile of a spherical droplet compressed between parallel plates. We solved the Laplace equation for this geometry and tested its solution on true liquids and embryonic tissue fragments as well as multicellular aggregates. The analytic solution provides the surface tension in terms of easily and accurately measurable geometric parameters. Experimental results show that the various tissues and multicellular aggregates studied here are incompressible and, similarly to true liquids, possess effective surface tensions that are independent of the magnitude of the compressive force and the volume of the droplet.

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