Gynura bicolor aqueous extract attenuated H2O2 induced injury in PC12 cells

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Title:	Gynura bicolor aqueous extract attenuated H2O2 induced injury in PC12 cells
Authors:	楊雅甄;Yang, Ya-Chen;吳文慈;Wu, Wen-Tzu;蒙美津;Mong, Mei-Shin;王智弘;Wang, Zhi-Hong
Contributors:	食品營養與保健生技學系
Date:	2019-06
Issue Date:	2019-11-15 02:35:41 (UTC+0)
Abstract:	Background: Protective effects of Gynura bicolor aqueous extract (GAE) at three concentrations upon nerve growth factor (NGF) differentiated-PC12 cells against H2O2 induced injury were examined. Methods: NGF differentiated-PC12 cells were treated with GAE at 0.25%, 0.5% or 1%. 100 μM H2O2 was used to treat cells with GAE pre-treatments. After incubating at 37 °C for 12 hr, experimental analyses were processed. Results: H2O2 exposure decreased cell viability, increased plasma membrane damage, suppressed Bcl-2 mRNA expression and enhanced Bax mRNA expression. GAE pre-treatments reversed these changes. H2O2 exposure reduced mitochondrial membrane potential, lowered Na+-K+-ATPase activity, and increased DNA fragmentation and Ca2+ release. GAE pre-treatments attenuated these alterations. H2O2 stimulated the production of reactive oxygen species (ROS), interleukin (IL)-1beta, IL-6 and tumor necrosis factor-alpha, lowered glutathione content, and reduced glutathione peroxidase (GPX) and catalase activities. GAE pretreatments maintained GPX and catalase activities; and concentration-dependently diminished the generation of ROS and inflammatory cytokines. H2O2 enhanced mRNA expression of nuclear factor kappa (NF-κ) B and p38. GAE pre-treatments decreased mRNA expression of NF-κB and p38. Conclusion: These findings suggested that GAE might be a potent neuronal protective agent.
Relation:	BioMedicine
Appears in Collections:	[Department of Food Nutrition and Healthy Biotechnology] Journal Article

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