Chun, Yoon Sun Zhang, Lijun Li, Huan Park, Yurim Chung, Sungkwon Yang, Hyun Ok 2024-01-19T21:05:16Z 2024-01-19T21:05:16Z 2021-09-04 2018-12 0893-7648 https://pubs.kist.re.kr/handle/201004/120637 The critical pathological feature of Alzheimer's disease (AD) is the accumulation of -amyloid (A), the main constituent of amyloid plaques. -amyloid precursor protein (APP) undergoes amyloidogenic cleavage by - and -secretase generating A at endosomes or non-amyloidogenic processing by -secretase precluding the production of A at the plasma membrane. Recently, several natural products have been widely researched on the prevention of A accumulation for AD treatment. We previously reported that Lycoris chejuensis K. Tae et S. Ko (CJ), which originated from Jeju Island in Korea, improved the disrupted memory functions and reduced A production in vivo. Here, we further explored the effect of its active component, 7-deoxy-trans-dihydronarciclasine (coded as E144), on A generation and the underlying mechanism. Our results showed that E144 reduced the level of APP, especially its mature form, in HeLa cells overexpressing human APP with the Swedish mutation. Concomitantly, E144 decreased the levels of A, sAPP, sAPP, and C-terminal fragment. In addition, administration of E144 normalized the behavioral deficits in Tg2576 mice, an APP transgenic mouse model of AD. E144 also decreased the A and APP levels in the cerebral cortex of Tg2576 mice. Thus, we propose that E144 could be a potential drug candidate for an anti-amyloid disease-modifying AD therapy. English SPRINGER PRECURSOR PROTEIN MATURATION ALPHA-SECRETASE CLEAVAGE SIGNALING PATHWAY GAMMA-SECRETASE DISINTEGRIN-METALLOPROTEASE O-GLYCOSYLATION DRUG CANDIDATES BETA NOTCH APH-1 7-Deoxy-trans-dihydronarciclasine Reduces -Amyloid and Ameliorates Memory Impairment in a Transgenic Model of Alzheimer's Disease Article 10.1007/s12035-018-1023-y 1 MOLECULAR NEUROBIOLOGY, v.55, no.12, pp.8953 - 8964 MOLECULAR NEUROBIOLOGY 55 12 8953 8964 scie scopus 000448483400013 2-s2.0-85044920311 Neurosciences Neurosciences & Neurology Article PRECURSOR PROTEIN MATURATION ALPHA-SECRETASE CLEAVAGE SIGNALING PATHWAY GAMMA-SECRETASE DISINTEGRIN-METALLOPROTEASE O-GLYCOSYLATION DRUG CANDIDATES BETA NOTCH APH-1 Alzheimer&apos s disease -amyloid precursor protein Cognition-improving effect 7-deoxy-trans-dihydronarciclasine -amyloid