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International Journal of Molecular Medicine
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Article

L‑carnitine alleviates oxidative stress‑related damage via MAPK signaling in human lens epithelial cells exposed to H2O2

  • Authors:
    • Xiaoxia Li
    • Fanlan Meng
    • Hua Li
    • Xia Hua
    • Li'an Wu
    • Xiaoyong Yuan
  • View Affiliations / Copyright

    Affiliations: Clinical College of Ophthalmology, Tianjin Medical University, Tianjin 300020, P.R. China, Department of Ophthalmology, Tianjin Orbit Research Institute, The Second Hospital of Tianjin Medical University, Tianjin 300211, P.R. China, Xi'an No. 4 Hospital, Shaanxi Ophthalmic Medical Center, Affiliated Guangren Hospital, School of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
  • Pages: 1515-1522
    |
    Published online on: July 22, 2019
       https://doi.org/10.3892/ijmm.2019.4283
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Abstract

L‑carnitine (LC) is well known for its antioxidative properties. The present study aimed to evaluate the effects of LC on human lens epithelial cells (HLECs) and to analyze its regulatory mechanism in cataractogenesis. HLE B‑3 cells were cultured with hydrogen peroxide (H2O2) and were pretreated with or without LC. The Cell Counting kit‑8 assay was used to determine cell viability. Reactive oxygen species (ROS) assay kit was used to measure the cellular ROS production induced by H2O2 and LC. In addition, reverse transcription‑quantitative PCR and western blot analysis were performed to detect the expression levels of oxidative damage markers and antioxidant enzymes. Notably, ROS overproduction was observed upon exposure to H2O2, whereas LC supplementation markedly decreased ROS levels through activation of the antioxidant enzymes forkhead box O1, peroxiredoxin 4 and catalase. Furthermore, LC suppressed the expression of apoptosis‑associated genes (caspase-3) and inflammation‑associated genes [interleukin (IL)1, IL6, IL8 and cyclooxygenase‑2]. Conversely, LC promoted proliferating cell nuclear antigen, cyclin‑dependent kinase (CDK)2 and CDK4 expression, which may increase proliferation of HLECs that were incubated with H2O2. In addition, epithelial‑mesenchymal transition occurred upon ROS accumulation, whereas the effects of H2O2 on AQP1 and vimentin expression were reversed upon LC supplementation. Notably, this study revealed that LC restored the oxidant/antioxidant balance and protected against cell damage through the mitogen‑activated protein kinase signaling pathway. In conclusion, LC may serve a protective role in curbing oxidative damage and therefore may be considered a potential therapeutic agent for the treatment of cataracts.
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Copy and paste a formatted citation
Spandidos Publications style
Li X, Meng F, Li H, Hua X, Wu L and Yuan X: L‑carnitine alleviates oxidative stress‑related damage via MAPK signaling in human lens epithelial cells exposed to H2O2. Int J Mol Med 44: 1515-1522, 2019.
APA
Li, X., Meng, F., Li, H., Hua, X., Wu, L., & Yuan, X. (2019). L‑carnitine alleviates oxidative stress‑related damage via MAPK signaling in human lens epithelial cells exposed to H2O2. International Journal of Molecular Medicine, 44, 1515-1522. https://doi.org/10.3892/ijmm.2019.4283
MLA
Li, X., Meng, F., Li, H., Hua, X., Wu, L., Yuan, X."L‑carnitine alleviates oxidative stress‑related damage via MAPK signaling in human lens epithelial cells exposed to H2O2". International Journal of Molecular Medicine 44.4 (2019): 1515-1522.
Chicago
Li, X., Meng, F., Li, H., Hua, X., Wu, L., Yuan, X."L‑carnitine alleviates oxidative stress‑related damage via MAPK signaling in human lens epithelial cells exposed to H2O2". International Journal of Molecular Medicine 44, no. 4 (2019): 1515-1522. https://doi.org/10.3892/ijmm.2019.4283
Copy and paste a formatted citation
x
Spandidos Publications style
Li X, Meng F, Li H, Hua X, Wu L and Yuan X: L‑carnitine alleviates oxidative stress‑related damage via MAPK signaling in human lens epithelial cells exposed to H2O2. Int J Mol Med 44: 1515-1522, 2019.
APA
Li, X., Meng, F., Li, H., Hua, X., Wu, L., & Yuan, X. (2019). L‑carnitine alleviates oxidative stress‑related damage via MAPK signaling in human lens epithelial cells exposed to H2O2. International Journal of Molecular Medicine, 44, 1515-1522. https://doi.org/10.3892/ijmm.2019.4283
MLA
Li, X., Meng, F., Li, H., Hua, X., Wu, L., Yuan, X."L‑carnitine alleviates oxidative stress‑related damage via MAPK signaling in human lens epithelial cells exposed to H2O2". International Journal of Molecular Medicine 44.4 (2019): 1515-1522.
Chicago
Li, X., Meng, F., Li, H., Hua, X., Wu, L., Yuan, X."L‑carnitine alleviates oxidative stress‑related damage via MAPK signaling in human lens epithelial cells exposed to H2O2". International Journal of Molecular Medicine 44, no. 4 (2019): 1515-1522. https://doi.org/10.3892/ijmm.2019.4283
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