Catalpol Protects Pre-Myelinating Oligodendrocytes against Ischemia-induced Oxidative Injury through ERK1/2 Signaling Pathway

Cai, Qiyan; Ma, Teng; Li, Chengren; Tian, Yanping; Li, Hongli

doi:10.7150/ijbs.16823

Theranostics

International Journal of Medical Sciences

Journal of Cancer

Nanotheranostics

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Int J Biol Sci 2016; 12(12):1415-1426. doi:10.7150/ijbs.16823 This issue Cite

Research Paper

Catalpol Protects Pre-Myelinating Oligodendrocytes against Ischemia-induced Oxidative Injury through ERK1/2 Signaling Pathway

Qiyan Cai, Teng Ma, Chengren Li, Yanping Tian, Hongli Li^✉

Chongqing Key Laboratory of Neurobiology, Department of Histology and Embryology, College of Basic Medicine, The Third Military Medical University, Chongqing, China.

Citation:

Cai Q, Ma T, Li C, Tian Y, Li H. Catalpol Protects Pre-Myelinating Oligodendrocytes against Ischemia-induced Oxidative Injury through ERK1/2 Signaling Pathway. Int J Biol Sci 2016; 12(12):1415-1426. doi:10.7150/ijbs.16823. https://www.ijbs.com/v12p1415.htm

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Abstract

The vulnerability of pre-myelinating oligodendrocytes (PreOLs) to ischemic injury plays an important role in the pathogenesis and progression of perinatal white matter injury. Although oxidative stress is thought to be a major pathogenic mechanism predisposing the PreOLs to injury, no effective therapies have been identified to date. The present study aimed to investigate the direct protective effects of catalpol, a potent antioxidant and free radical scavenger, on ischemia-induced oxidative damage in PreOLs and to explore whether the ERK1/2 signaling pathway contributed to the protection provided by catalpol. Primary cultures of PreOLs exposed to oxygen-glucose deprivation (OGD) followed by reperfusion were used as an in vitro model of ischemia. Pretreatment with 0.5 mM catalpol for 1 h prior to OGD treatment significantly reversed ischemia-induced apoptosis in PreOLs and myelination deficits by inhibiting intracellular Ca²⁺ increase, reducing mitochondrial damage, and ameliorating overproduction of reactive oxygen species (ROS). The expression levels of phosphorylated ERK1/2 (p-ERK1/2) and activated poly-ADP-ribose polymerase-1 (PARP-1) were also markedly decreased by catalpol treatment. Blocking the ERK1/2 signaling pathway with the MEK inhibitor U0126 and catalpol significantly protected PreOLs from ROS-mediated apoptosis under OGD. Taken together, these results suggest that catalpol protects PreOLs against ischemia-induced oxidative injury through ERK1/2 signaling pathway. Catalpol may be a candidate for treating ischemic white matter damage.

Keywords: catalpol, pre-myelinating oligodendrocytes, oxidative stress, ERK1/2, oxygen-glucose deprivation

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APA

Cai, Q., Ma, T., Li, C., Tian, Y., Li, H. (2016). Catalpol Protects Pre-Myelinating Oligodendrocytes against Ischemia-induced Oxidative Injury through ERK1/2 Signaling Pathway. International Journal of Biological Sciences, 12(12), 1415-1426. https://doi.org/10.7150/ijbs.16823.

ACS

Cai, Q.; Ma, T.; Li, C.; Tian, Y.; Li, H. Catalpol Protects Pre-Myelinating Oligodendrocytes against Ischemia-induced Oxidative Injury through ERK1/2 Signaling Pathway. Int. J. Biol. Sci. 2016, 12 (12), 1415-1426. DOI: 10.7150/ijbs.16823.

NLM

CSE

Cai Q, Ma T, Li C, Tian Y, Li H. 2016. Catalpol Protects Pre-Myelinating Oligodendrocytes against Ischemia-induced Oxidative Injury through ERK1/2 Signaling Pathway. Int J Biol Sci. 12(12):1415-1426.

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