ReferenceID 2442
Myricetin prevents high molecular weight Aβ1-42 oligomer-induced neurotoxicity through antioxidant effects in cell membranes and mitochondria
Free Radic Biol Med
Excessive accumulation of amyloid beta-protein (Abeta) is one of the primary mechanisms that leads to neuronal death with phosphorylated tau in the pathogenesis of Alzheimer's disease (AD). Protofibrils, one of the high-
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- Reference Id
- 2442
- Evidence Id
- 19032
- Core Evidence Id
- 19032
- Source Reference Id
- 4889
- Herb2 Reference Id
- HBREF005686
- Subject Paper Key
- HBIN036092_34015458
- Pubmed Id
- 34015458
- Doi
- 10.1016/j.freeradbiomed.2021.05.019
- Paper Title
- Myricetin prevents high molecular weight Aβ1-42 oligomer-induced neurotoxicity through antioxidant effects in cell membranes and mitochondria
- Paper Abstract
- Excessive accumulation of amyloid beta-protein (Abeta) is one of the primary mechanisms that leads to neuronal death with phosphorylated tau in the pathogenesis of Alzheimer's disease (AD). Protofibrils, one of the high-molecular-weight Abeta oligomers (HMW-Abetao), are implicated to be important targets of disease modifying therapy of AD. We previously reported that phenolic compounds such as myricetin inhibit Abeta1-40, Abeta1-42, and alpha-synuclein aggregations, including their oligomerizations, which may exert protective effects against AD and Parkinson's disease. The purpose of this study was to clarify the detailed mechanism of the protective effect of myricetin against the neurotoxicity of HMW-Abetao in SH-SY5Y cells. To assess the effect of myricetin on HMW-Abetao-induced oxidative stress, we systematically examined the level of membrane oxidative damage by measuring cell membrane lipid peroxidation, membrane fluidity, and cell membrane potential, and the mitochondrial oxidative damage was evaluated by mitochondrial permeability transition (MPT), mitochondrial reactive oxygen species (ROS), and manganese-superoxide dismutase (Mn-SOD), and adenosine triphosphate (ATP) assay in SH-SY5Y cells. Myricetin has been found to increased cell viability by suppression of HMW-Abetao-induced membrane disruption in SH-SY5Y cells, as shown in reducing membrane phospholipid peroxidation and increasing membrane fluidity and membrane resistance. Myricetin has also been found to suppress HMW-Abetao-induced mitochondria dysfunction, as demonstrated in decreasing MPT, Mn-SOD, and ATP generation, raising mitochondrial membrane potential, and increasing mitochondrial-ROS generation. These results suggest that myricetin preventing HMW-Abetao-induced neurotoxicity through multiple antioxidant functions may be developed as a disease-modifying agent against AD.
- Journal
- Free Radic Biol Med
- Publish Year
- 2021
- Experiment Subject
- Experiment Type
- Cell Experiment
- Phenotype Related
- Parkinson's Disease; Alzheimer's Disease; Neuronal Death
- Paper Title Cn
- Paper Title En
- Myricetin prevents high molecular weight Aβ1-42 oligomer-induced neurotoxicity through antioxidant effects in cell membranes and mitochondria
- Bilingual Status
- semi_complete