Skemiene 2020 J Bioenerg Biomembr
| Skemiene K, Pampuscenko K, Rekuviene E, Borutaite V (2020) Protective effects of anthocyanins against brain ischemic damage. J Bioenerg Biomembr [Epub ahead of print]. |
Skemiene K, Pampuscenko K, Rekuviene E, Borutaite V (2020) J Bioenerg Biomembr
Abstract: Anthocyanins are considered as bioactive components of plant-based diets that provide protection against ischemic cardiovascular pathologies by mechanisms dependent on their antioxidant and reductive capacities. However, it is not clear whether similar anthocyanin-mediated mechanisms can provide protection against ischemia-induced brain mitochondrial injury and cell death. In this study, we compared effects of three cyanidin-3-glycosides - glucoside (Cy3G), galactoside (Cy3Gal) and rutinoside (Cy3R), with pelargonxidin-3-glucoside (Pg3G) and found that at 10-20 ฮผM concentrations they have no direct effect on respiratory functions of mitochondria isolated from normal or ischemia-damaged rat brain slices. However, intravenous injection of Cy3Gal and Cy3G (0,025 mg/kg or 0,05 mg/kg what matches 10 ฮผM or 20 ฮผM respectively) but not Cy3R in rats protected against ischemia-induced caspase activation and necrotic cell death, and reduced infarct size in cerebral cortex and cerebellum. These effects correlated with cytochrome c reducing capacity of cyanidin-3-glycosides. In contrast, intravenous injection of 0,025 mg/kg Pg3G which has the lowest cytochrome c reducing capacity among investigated anthocyanins, had no effect on ischemia-induced caspase activation and necrosis but reduced brain infarct size whereas intravenous injection of 0,05 mg/kg of Pg3G slightly promoted necrosis in the brain. Our data suggest that reductive rather than antioxidant capacities of anthocyanins may be important components in providing protection against ischemic brain damage. โข Keywords: Anthocyanins, Brain ischemia, Cell death, Mitochondria, Neuroprotection, Respiration โข Bioblast editor: Plangger M
Labels: MiParea: Respiration
HRR: Oxygraph-2k
Labels, 2020-03
