The Bruce and Ruth Rappaport Foundation continues to encourage excellence in the young and even younger. In 2017, a new prize category was established for the Biomedical Research Prize: a prize given to outstanding doctoral students in biomedicine and biomedical engineering. Doctoral students enrich the academic institutions in which they study and gain an opportunity to advance those institutions' research directions by working shoulder-to-shoulder with the senior researchers. The academic institutions and the researchers, some of whom have been prizewinners as well, are responsible for submitting the candidacy of these doctoral students.
Gal Levi
of the Hebrew University of Jerusalem has developed innovative metabolic models for the study of disease and medicinal toxicity. In his work, Levi has for the first time developed regeneration of the liver in a Petri dish through the use of a genetic switch, which enables human liver cells to multiply under laboratory conditions without losing their unique activity. In addition, he created, for the first time, the metabolic profile of human liver cells infected with viral hepatitis C, thus revealing how viral infection affects cell metabolism. For the purpose of therapeutic application of his discoveries, Levi has proposed new approaches to drug intervention.
Maayan Levi of the Weizmann Institute of Science has focused her doctoral thesis on mechanisms that enable the maintenance of proper equilibrium in the intestinal mucosa and primarily the inflammasome (a sensor that monitors the bacterial population and is created by a series of signals that are transmitted within a cell) known as NLRP6. In her research, Levi identified metabolites (small molecules) that are able to affect the activation of the inflammasome and on the secretion of cytokine IL18 and anti-bacterial molecules. These results suggest a method through which the microbiota (the ecological community of microorganisms found in the digestive system and consisting of bacteria, archaea, eukaryotes and viruses) and the host (humans, but also all mammals and multi-celled organisms) together create a healthy niche in the intestines.
Treatments based on microbiota are divided into probiotics (bacteria that are added to the existing community of bacteria) and prebiotics (various materials that can affect the growth or functioning of existing bacteria). The disadvantage of these treatments is that the response can vary highly among different people and as a result the treatment will not be effective to the same degree. The study proposes an additional new type of treatment called postbiotics, which uses metabolites from bacteria that can affect the functioning of the immune system of the host. Such treatment bypasses the changes that can occur in the bacterial community in situations of illness and acts directly on the molecular mechanisms of the illness and offers a promising alternative for future treatment.
Ido Sagi of the Department of Genetics at the Hebrew University of Jerusalem, studies under the mentorship of Prof. Nissim Benvenisty, whose laboratory specializes in genetic research using human stem cells. The primary subject of his research is the production and specification of human haploid stem cells. Most of the cells in our body are diploid, in other words, they carry two copies of the genome, while the only cells that carry one copy, and are considered haploid cells, are the reproductive cells. In his study, Ido Sagi has managed to isolate human haploid stem cells for the first time and to illustrate the similarities and differences between haploid and diploid stem cells.