| Tempeh is a traditional fermented Indonesian food from white soybean. Tempe has better nutritional value than non-fermented white soybean. The aim of this study was to extract tempeh oil and analyze the inhibitory potency of Alzheimer-related gene expression in LPS-induced neuronal Schwann cells. Tempeh oil was extracted with Bligh Dyer method and was analyzed with PUFA identification, anticholinesterase activity, antioxidant activity, and quantitative PCR. Tempeh oil had a total yield of 7.14%, and PUFA identification found 8.37% omega-3. The anti-acetylcholinesterase activity showed that tempeh oil 25 µg/mL had the highest activity and 500 µg/mL in anti-butyrylcholinesterase activity. The quantitative PCR showed that tempeh oil had downregulated the gene expression of PSEN1, Gsk3b, cdk5, and TNF. From this study, tempeh oil may have the potential to lower the risk of Alzheimer’s disease by regulating certain gene traits. |