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Curcumin activates autophagy and attenuates oxidative damage in EA.hy926 cells via the Akt/mTOR pathway
- Source :
- Molecular Medicine Reports. 13:2187-2193
- Publication Year :
- 2016
- Publisher :
- Spandidos Publications, 2016.
-
Abstract
- Curcumin, which is the effective component of turmeric (Curcuma longa), has previously been shown to exert potent antioxidant, antitumor and anti‑inflammatory activities in vitro and in vivo. However, the mechanism underlying the protective effects of curcumin against oxidative damage in endothelial cells remains unclear. The present study aimed to examine the effects of curcumin on hydrogen peroxide (H2O2)‑induced apoptosis and autophagy in EA.hy926 cells, and to determine the underlying molecular mechanism. Cultured EA.hy926 cells were treated with curcumin (5‑20 µmol/l) 4 h prior to and for 4 h during exposure to H2O2 (200 µmol/l). Oxidative stress resulted in a significant increase in the rate of cell apoptosis, which was accompanied by an increase in the expression levels of caspase‑3 and B‑cell lymphoma 2 (Bcl‑2)‑associated X protein (Bax), and a decrease in the expression levels of Bcl‑2. Treatment with curcumin (5 or 20 µmol/l) significantly inhibited apoptosis, and reversed the alterations in caspase‑3, Bcl‑2 and Bax expression. Furthermore, curcumin induced autophagy and microtubule‑associated protein 1A/1B‑light chain 3‑Ⅱ expression, and suppressed the phosphorylation of Akt and mammalian target of rapamycin (mTOR). These results indicated that curcumin may protect cells against oxidative stress‑induced damage through inhibiting apoptosis and inducing autophagy via the Akt/mTOR pathway.
- Subjects :
- 0301 basic medicine
Cancer Research
Curcumin
Cell Survival
Down-Regulation
Apoptosis
Biology
Pharmacology
medicine.disease_cause
Biochemistry
Cell Line
03 medical and health sciences
chemistry.chemical_compound
Autophagy
Genetics
medicine
Humans
Phosphorylation
Molecular Biology
Protein kinase B
PI3K/AKT/mTOR pathway
TOR Serine-Threonine Kinases
Hydrogen Peroxide
Cytoprotection
Cell biology
Oxidative Stress
030104 developmental biology
Oncology
chemistry
Molecular Medicine
Signal transduction
Apoptosis Regulatory Proteins
Proto-Oncogene Proteins c-akt
Oxidative stress
Signal Transduction
Subjects
Details
- ISSN :
- 17913004 and 17912997
- Volume :
- 13
- Database :
- OpenAIRE
- Journal :
- Molecular Medicine Reports
- Accession number :
- edsair.doi.dedup.....2da9fb2eeca991a3988bee3304a46523