Dr. Choi focused on two important topics. The first is the role of oxidative stress and neuronal cell death on diseases of hippocampus neuronal cells. With her discovery of the specific role of each molecule in the signaling cascade, she develops neuroprotective drugs using in vitro and in vivo models. The second, she studies the mechanisms of the cell cycle, apoptosis and cell signaling pathways implicated in the chemical reactions of cancer cells and various human diseases. She has published more than 20 scientific papers related to this research.