Orthosiphon aristatus (Blume) Miq. Extracts attenuate Alzheimer-like pathology through anti-inflammatory, anti-oxidative, and β-amyloid inhibitory activities

作者：Kuang‐Hsing Chiang, Tain‐Junn Cheng, Wei‐Chih Kan, Hsien‐Yi Wang, Jui-Chen Li, Yan-Ling Cai, Chia-Hui Cheng, Yi‐Chien Liu, Chia‐Yu Chang, Jiunn‐Jye Chuu · 发表于：Journal of Ethnopharmacology · 年份：2023 · DOI：10.1016/j.jep.2023.117132 · 被引用次数：7 · 研究领域：Bioactive Compounds in Plants、Medicinal Plants and Neuroprotection、Neurological Disease Mechanisms and Treatments

Ethnopharmacological relevance Orthosiphon aristatus (Blume) Miq. (OA) is a traditional folk-herb, which is usually used to treat acute and chronic nephritis , epilepsy, cystitis , and other diseases. Phenols and flavonoids are the main active compound compounds of OA, with proven anti-inflammatory and antioxidant activities . Aims of this study Based on evidenced therapeutic activities, we aimed to investigate the impact of OA on Alzheimer's disease (AD) which is the most common age-related neurodegenerative disease , and the pathological features include accumulation of beta-amyloid (Aβ) and neurofibrillary tangles (NFT). Materials and methods OA was extracted with water, methanol, chloroform, and ethyl acetate , and determined its total flavonoid and phenolic contents. Initially, Aβ 1-42 based cytotoxicity was induced in BV2 cells and C6 cells to investigate the therapeutic impact of OA therapy by MTT, RT-PCR, Western blot , and ELISA . Further, Aβ 1−42 Oligomer (400 pmol)-induced AD mice model was established to evaluate the impact of OA extract on improving learning and memory impairment. Results The results showed that the extract of OA could increase cell survival, inhibit the expression of TNF-α, IL-6, IL-1β, COX-2, and iNOS, and increase BDNF levels. We infer that the OA extract may attenuate Aβ-induced cytotoxicity by retarding the production of inflammatory-related factors. In the animal behavior test, the number of mice entering darkroom and the time of arriving a...