Molecular Neurobiology

, Volume 53, Issue 1, pp 695–705 | Cite as

Atorvastatin Protects NSC-34 Motor Neurons Against Oxidative Stress by Activating PI3K, ERK and Free Radical Scavenging

  • Seok-Ho Lee
  • Na-Young Choi
  • Hyun-Jeung Yu
  • Jinse Park
  • Hojin Choi
  • Kyu-Yong Lee
  • Yong-Min Huh
  • Young Joo Lee
  • Seong-Ho Koh
Article

Abstract

Although statins, or hydroxymethylglutaryl coenzyme A (HMG-Co A) reductase inhibitors, are generally used to decrease levels of circulating cholesterol, they have also been reported to have neuroprotective effects through various mechanisms. However, recent results have indicated that they may be harmful in patients with amyotrophic lateral sclerosis (ALS). In this study, we investigate whether atorvastatin protects motor neuron-like cells (NSC-34D) from oxidative stress. To evaluate the effects of atorvastatin or hydrogen peroxide or both on NSC-34D cells, the cells were treated with various combinations of these agents. To evaluate the viability of the cells, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assays and trypan blue staining were performed. Levels of free radicals and intracellular signaling proteins were evaluated using the fluorescent probe 2′,7′-dichlorodihydrofluorescein diacetate (DCFH-DA) and Western blotting, respectively. Atorvastatin protected NSC-34D cells against oxidative stress in a concentration-dependent manner. This neuroprotective effect of atorvastatin was blocked by LY294002, a phosphatidylinositol 3-kinase (PI3K) inhibitor and by FR180204, a selective extracellular signal-related kinase (ERK) inhibitor. Atorvastatin treatment increased the expression levels of p85αPI3K, phosphorylated Akt, phosphorylated glycogen synthase kinase-3β, phosphorylated ERK, and Bcl-2, which are proteins related to survival. Furthermore, atorvastatin decreased the levels of cytosolic cytochrome C, Bax, cleaved caspase-9, and cleaved caspase-3, which are associated with death in oxidative stress-injured NSC-34D cells. We conclude that atorvastatin has a protective effect against oxidative stress in motor neurons by activating the PI3K and ERK pathways as well as by scavenging free radicals. These findings indicate that statins could help protect motor neurons from oxidative stress.

Keywords

Statin Amyotrophic lateral sclerosis Phosphatidylinositol 3-kinase Extracellular signal-related kinase 

Notes

Acknowledgments

This work was supported by a grant from the Korea Research Foundation (2012R1A1B3000473) and a grant from the NanoBio R&D Program of the Korea Science and Engineering Foundation, funded by the Ministry of Education, Science and Technology (2007–04717).

Conflict of Interest

None.

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • Seok-Ho Lee
    • 1
  • Na-Young Choi
    • 2
  • Hyun-Jeung Yu
    • 3
  • Jinse Park
    • 4
  • Hojin Choi
    • 1
  • Kyu-Yong Lee
    • 1
  • Yong-Min Huh
    • 5
  • Young Joo Lee
    • 1
  • Seong-Ho Koh
    • 1
    • 2
  1. 1.Department of NeurologyHanyang University College of MedicineGyeonggi-doSouth Korea
  2. 2.Department of Translational Medicine, Graduate School of Biomedical Science and EngineeringHanyang UniversitySeoulSouth Korea
  3. 3.Department of NeurologyBundang Jesaeng HospitalGwangjuSouth Korea
  4. 4.Department of Neurology, Haeundae Paik Hospital, College of MedicineInje UniversityBusanSouth Korea
  5. 5.Department of Radiology, College of MedicineYonsei UniversitySeoulSouth Korea

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