Synthetic biology reinvents development
The research team have used synthetic biology to develop a new type of genetic design
Salva Duran
Now, a research team from the Institute of Evolutionary Biology (IBE), a joint centre of UPF and the Spanish National Research Council (CSIC), has developed a new type of model and its implementation using synthetic biology can reproduce the symmetry breakage observed in embryos with the minimum amount of ingredients possible.
The research team has managed to implement via synthetic biology (by introducing parts of genes of other species into the E. coli bacteria) a mechanism to generate spatial patterns observed in more complex animals, such as Drosophila melanogaster (fruit fly) or humans. In the study, the team observed that the strains of modified E. coli, which normally grow in (symmetrical) circular patterns, do as in the shape of a flower with petals at regular intervals, just as Turing had predicted.
"We wanted to build symmetry breaking that is never seen in colonies of E. coli, but is seen in patterns of animals, and then to discover which are the essential ingredients needed to generate these patterns", says Salva Duran-Nebreda, who conducted this research for his doctorate in the Complex Systems laboratory and is currently a postdoctoral researcher at the IBE Evolution of Technology laboratory.
Using the new synthetic platform, the research team was able to identify the parameters that modulate the emergence of spatial patterns in E. coli . "We have seen that by modulating three ingredients we can induce symmetry breaking. In essence, we have altered cell division, adhesion between cells and long-distance communication capacity (quorum sensing), that is to say, perceive when there is a collective decision", Duran-Nebreda comments.
The observations made in the E. coli model could be applied to more complex animal models or to insect colony design principles. "In the same way that organoids or miniature organs can help us develop therapies without having to resort to animal models, this synthetic system paves the way to understanding as universal a phenomenon as embryonic development in a far simpler in vitro system", says Ricard Solé, ICREA researcher with the Complex Systems group at the IBE, and head of the research.
The model developed in this study, the first of its kind, could be key to understanding some embryonic development events. "We must think of this synthetic system as a platform for learning to design different fundamental biological mechanisms that generate structures, such as the step from a zygote to the formation of a complete organism. Moreover, such knowledge on the frontier between mechanical and biological processes, could be very useful for understanding developmental disorders", Duran-Nebreda concludes.