Related Experiment Video
Updated: Aug 10, 2025
06:17
A11-positive β-amyloid Oligomer Preparation and Assessment Using Dot Blotting Analysis
Published on: May 22, 2018
12.0K
Cultivation Factors That Affect Amyloid-β Aggregation Inhibitory Activity in Perilla frutescens var. crispa
Keiya Shimamori1, Tomohiko Nambu1, Daiki Kawamata1
1Graduate School of Engineering, Muroran Institute of Technology, Muroran 050-8585, Japan.
Foods (Basel, Switzerland)
|February 11, 2023
Summary
Cultivating Perilla frutescens var. crispa just before flowering, with proper nitrogen and drying, enhances its amyloid-beta aggregation inhibitory activity for Alzheimer's disease prevention.
Area of Science:
- Neuroscience
- Pharmacognosy
- Plant Science
Background:
- Alzheimer's disease (AD) is linked to amyloid-beta (Aβ) plaque deposition, which begins decades before symptoms manifest.
- Previous research identified Perilla frutescens var. crispa as a plant with high Aβ aggregation inhibitory activity.
- Plant metabolism, influenced by cultivation, can modulate Aβ aggregation inhibitory properties.
Purpose of the Study:
- To investigate how specific cultivation factors impact the Aβ aggregation inhibitory activity of Perilla frutescens var. crispa.
- To identify optimal cultivation conditions for maximizing the plant's potential in Alzheimer's disease prevention.
Main Methods:
- Cultivated Perilla frutescens var. crispa under varying conditions across three fields.
- Assessed Aβ aggregation inhibitory activity using a microliter-scale high-throughput screening (MSHTS) system with quantum dot nanoprobes.
- Evaluated the effect of flowering stage, wind exposure, nitrogen fertilization, and drying period on plant activity.
- Tested the neuroprotective effects of leaf extracts on nerve growth factor-differentiated PC12 cells against Aβ toxicity.
Main Results:
- Harvesting Perilla frutescens var. crispa just before flowering yielded the highest Aβ aggregation inhibitory activity.
- Wind-shielded plants showed significantly reduced activity (1/5th) compared to those harvested at peak flowering.
- Optimal nitrogen fertilization and a drying period of at least one week before harvest further enhanced activity.
- Leaf extracts demonstrated efficacy in suppressing Aβ-induced toxicity in neuronal cells.
Conclusions:
- Flowering stage, wind exposure, soil water content, and soil nitrogen content are critical factors influencing the Aβ aggregation inhibitory activity of Perilla frutescens var. crispa.
- Practical cultivation strategies, including timing of harvest, nitrogen management, and drying, can optimize the plant's potential for AD prevention.
- Perilla frutescens var. crispa extracts show promise as a natural intervention for mitigating Aβ neurotoxicity.
