UNIVERSITY OF ILLINOIS AT CHICAGO Department of Psychiatry Fifth Annual Research Forum – Extravaganza 2014 POSTER TITLE A new method to generate neurons effectively from cultured SH-SY5Y cells Neuronal production, SH-SY5Y cells, neural stem cells, and condition medium DISEASE/KEY WORDS: AUTHORS: Hongna Yang, Yan Li, Feng Wang, and Tingyu Qu MENTEE CATEGORY: Post- doc, PhD student, Visiting scientist BACKGROUND: It is well known that the differentiated SH-SY5Y cells can be used as a neuronal cell model in vitro for neuroscience and neurotoxicity research. Retinoic acid (RA) is the most commonly used inducer for neuronal differentiation of SHSY5Y cells. However, neuronal production is very low under RA treatment or combination of RA and other chemicals. METHODS: We explored to use a conditioned medium of human neural stem cells (CMhNSCs) to culture SH-SY5Y cells in combination with RA for 3 to 7 days to produce neuronal cells. RESULTS: We found that the neuronal proportion of differentiated SH-SY5Y cells was significantly iicreased after 3 and 7 day treatment of CM-hNSCs and RA compared to that with only RA treatment, in which about 90% of differentiated cells showing positive beta-III tubulin staining, a well-accepted neuronal marker. In addition, maturation of the neurons differentiated from SH-SY5Y cells following CM-hNSCs and RA treatment was greatly improved, with long and multiple cell process as well as fiber development. CONCLUSIONS: It is the first study to use CM-hNSCs for promoting neuronal differentiation of RA treated SH-SY5Y cells. Our new method can effectively induce neuronal differentiation of SH-SY5Y cells and increase the proportion of neurons in these differentiated cells. This research is supported by grants of DoD (PR100499P1) & the Boothroyd Foundation to T. QU. RESEARCH MENTOR: Tingyu Qu