Abstract
Abstract The main goal of this study was to elucidate the neuron proliferation and cognition improvement effects of steamed and freeze-dried mature silkworm powders (SMSP). Concentrates of 80% methanol extracts from golden silk-SMSP (GS-SMSP) contained 3.6–4.9 times more phytochemicals and 1.8–3.1 times more antioxidant activities and showed significantly higher mouse hippocampal HT22 neuronal cell proliferation effects than those of white jade (WJ)-SMSP. In addition, GS-SMSP was more effective in suppressing scopolamine (SCO)-induced amnesia in the mice than WJ-SMSP. Furthermore, the suppression of SCO-induced amnesia by GS-SMSP in the mice was dose-dependent. The significantly reduced mitochondrial respiratory complex (MitoCom) activities and ATP amounts in the brains of SCO-injected mice were recovered in the mice supplemented with GS-SMSP. Taken together, the results of this study indicate that enhanced mitochondrial function in the brains of mice supplemented with GS-SMSP was the molecular basis of suppression of SCO-induced amnesia in a rodent model.
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