[Funded by the Origins Center]
Take our body – the loose cells cannot exist on their own. But from a single egg cell, a whole body can grow. Biological systems consist of different levels of organization that are connected to each other. How have cells ‘learned’ to divide the tasks within an organism?
Cells started working together as a result of evolution (replication, mutation and selection) which had a favourable effect on the survival chances of cells. Cells may have only worked together temporarily at first, when circumstances made this necessary. Later on, cell collaborations were maintained for a long time. Cells began to divide tasks and distribute energy and nutrition.
Eventually very stable forms of cooperation emerged. Individual cells could even detach (or die off) from the collective without the cooperation suffering much from it. Eventually multicellular organisms came into being that no longer consisted of cells that could survive alone, as in our bodies. Reproduction of the species takes place from an individual cell which can ‘build up’ a new multicellular organism via cell division and the division of tasks according to a set plan.
In order to better understand the steps that have led to multicellular organisms, researchers make mathematical and computer models of prebiotic and biological systems. Through these computer models, researchers see how certain forms of cooperation and organization between cells evolve.
Two projects are carried out in the research groups of Roeland Merks, Leiden University, Paulien Hogeweg, Utrecht University and Jacintha Ellers and Bas Teusink, VU University Amsterdam. Enrico Sandro Colizzi and Renske Vroomans are principal investigators.