The 4th international scientific symposium was held with members of the Leipzig University and Vanderbilt University from the 6th to the 12th of July 2013 in Leipzig. The focus of this event taking place at the Biotechnological-Biomedical Center (BBZ) of the University of Leipzig was the further organization and consolidation of the university partnership (MOU) between Leipzig and Vanderbilt University. Likewise this event was set out to be a Kick-Off-Meeting for two new international junior research groups, which are funded by the State Ministry of Science and Arts through the European Social Fond (ESF) since July 1st. The fourth cooperation workshop (scientific symposium) is linked to the plans of the Leipzig