Garcinia xanthochymus extract protects PC12 cells from HO-induced apoptosis through modulation of PI3K/AKT and NRF2/HO-1 pathways / 中国天然药物
Chinese Journal of Natural Medicines (English Ed.)
;
(6): 825-833, 2017.
Artigo
em Inglês
| WPRIM
| ID: wpr-812052
ABSTRACT
The aim of the present study was to investigate the protective effects and underlying mechanisms of Garcinia xanthochymus, a perennial medicinal plant native to Yunnan, China, against HO-induced oxidative damage in rat pheochromacytoma PC12 cells. Preincubation of PC12 cells with fruit EtOAc fraction (fruit-EFr., 12.5-50 µmol·L) of G. xanthochymus for 24 h prior to HO exposure markedly improved cell viability and increased the activities of antioxidant enzymes (superoxide dismutase, catalase, and heme oxygenase-1 [HO-1]), prevented lactate dehydrogenase release and lipid peroxidation malondialdehyde production, attenuated the decrease of matrix metalloproteinases (MMP), and scavenged reactive oxygen species (ROS). Fruit-EFr. also reduced BAX and cytochrome C expression and improved BCL-2 expression, thereby decreasing the ratio of BAX to BCL-2. Fruit-EFr. activated the nuclear translocation of NRF2 to increase HO-1 and induced the phosphorylation of AKT. Its cytoprotective effect was abolished by LY294002, a specific inhibitor of PI3K. Taken together, the above findings suggested that fruit-EFr.of G. xanthochymus could enhance cellular antioxidant defense capacity, at least in part, through upregulating HO-1 expression and activating the PI3K/AKT pathway and that it could suppress HO-induced oxidative damage via PI3K/AKT and NRF2/HO-1 signaling pathways.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Farmacologia
/
Fosforilação
/
Transporte Biológico
/
Extratos Vegetais
/
Transdução de Sinais
/
Sobrevivência Celular
/
Células PC12
/
Apoptose
/
Estresse Oxidativo
/
Proteínas Proto-Oncogênicas c-bcl-2
Limite:
Animais
Idioma:
Inglês
Revista:
Chinese Journal of Natural Medicines (English Ed.)
Ano de publicação:
2017
Tipo de documento:
Artigo
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