Extracts and Scirpusin B from Recycled Seeds and Rinds of Passion Fruits (<i>Passiflora edulis</i> var. Tainung No. 1) Exhibit Improved Functions in Scopolamine-Induced Impaired-Memory ICR Mice

• Main Authors: Yi-Yan Sie (Author), Liang-Chieh Chen (Author), Cai-Wei Li (Author), Ching-Chiung Wang (Author), Cai-Jhen Li (Author), Der-Zen Liu (Author), Mei-Hsien Lee (Author), Lih-Geeng Chen (Author), Wen-Chi Hou (Author)
• Format: Book
• Published: MDPI AG, 2023-11-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.
• Notes: 10.3390/antiox12122058; 2076-3921
• Keywords: acetylcholinesterase; passion fruits (<i>Passiflora edulis</i>); passive avoidance test; piceatannol; scirpusin B; scopolamine; Therapeutics. Pharmacology; RM1-950
• Source: Antioxidants, Vol 12, Iss 12, p 2058 (2023)

In this paper, the seeds and rinds of passion fruit, which are the agricultural waste of juice processing, were recycled to investigate their biological activities for sustainable use. De-oiled seed powders (S) were successively extracted by refluxing 95% ethanol (95E), 50E, and hot water (HW), respectively, to obtain S-95EE, S-50EE, and S-HWE. Dried rind powders were successively extracted by refluxing HW and 95E to obtain rind-HWE and rind-95EE, respectively. S-50EE and S-95EE showed the most potent extracts, such as anti-amyloid-β_1-42 aggregations and anti-acetylcholinesterase inhibitors, and they exhibited neuroprotective activities against amyloid-β_25-35-treated or H₂O₂-treated SH-SY5Y cells. Scirpusin B and piceatannol were identified in S-95EE, S-50EE, and rind-HWE, and they showed anti-acetylcholinesterase activity at 50% inhibitory concentrations of 62.9 and 258.9 μM, respectively. Daily pretreatments of de-oiled seed powders and rind-HWE (600 mg/kg), S-95EE, and S-50EE (250 mg/kg) or scirpusin B (40 mg/kg) for 7 days resulted in improved learning behavior in passive avoidance tests and had significant differences (<i>p</i> < 0.05) compared with those of the control in scopolamine-induced ICR mice. The seeds and rinds of passion fruit will be recycled as materials for the development of functional foods, promoting neuroprotection and delaying the onset of cognitive dysfunctions.