Subsequent to his PhD at the Institute of Pathology in Tübingen, Germany, Dr. Liebner carried out postdoctoral training at IFOM with Prof. Elisabetta Dejana. During his research in the group of Prof. Dejana he started his ongoing interest in the Wnt/β-catenin pathway. When Dr. Liebner moved as a group leader to the Edinger Institute Frankfurt, Germany in 2005, he expanded his research to study signaling pathways, such as Wnt/β-catenin, in the differentiation of barrier properties of endothelial cells in the central nervous system, specifically the blood-brain barrier (BBB).
Dr. Liebner continued these themes to understand BBB malfunction under pathological conditions, such as in brain tumors and Alzheimer’s disease. Dr. Liebner has been invited as Keynote speaker to the biannual Cerebral Vascular Biology Meeting in 2013 and has contributed to the organization of scientific conferences including the "2014 Cold Spring Harbor Laboratory Meeting on Blood Brain Barrier". He has published in prestigious international journals and has obtained funding from major national and international agencies.