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Protective Effects of Anthocyanins Extracted from Vaccinium Uliginosum on 661W Cells Against Microwave-Induced Retinal Damage

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Chinese Journal of Integrative Medicine Aims and scope Submit manuscript

Abstract

Objective

To study the protective effect of anthocyanins extracted from Vaccinium Uliginosum (VU) on retinal 661W cells against microwave radiation induced retinal injury.

Methods

661W cells were divided into 6 groups, including control, model [661W cells radiated by microwave (30 mW/cm2, 1 h)] and VU groups [661W cells pretreated with anthocyanins extracted from VU (25, 50, 100 and 200 µg/mL, respectively) for 48 h, and radiated by microwave 30 mW/cm2, 1 h]. After treatment with different interventions, the cell apoptosis index (AI) was determined using Heochst staining; contents of malonaldehyde (MDA), glutataione (GSH), and activity of superoxide dismutase (SOD) were measured. mRNA expressions of nuclear factor erythroid 2-related factor 2 (Nrf2) and heme oxygenase 1(HO-1) were detected by real time quantitative polymerase chain reaction, and the expression of HO-1 protein was examined by Western blot analysis. Nucleus and cytoplasm were separated and Nrf2 protein expression was further verified by Western blot analysis.

Results

There was significant difference in AI among the groups (F=322.83, P<;0.05). Compared with the control group, AI was significantly higher in the model group and was lower in 4 VU-pretreated groups (P<;0.05). Linear regression analysis showed the decline of AI was in a dose-dependent manner with VU treatment (r=0.8419, P<;0.05). The MDA and GSH contents of 661W cells in VU-treated groups were significantly lower than the model group (P<;0.05). Compared with the model group, the SOD activity in the VU-treated groups (50, 100 and 200 µg/mL) was significantly higher (all P<;0.05). The Nrf2 and HO-1 mRNA expressions were slightly increased after irradiation, and obviously increased in 100 µg/mL VU-treated group. After irradiation, the relative expressions of HO-1 and Nrf2 proteins in nucleus were slightly increased (P<;0.05), and the changes in cytoplasm were not obvious, whereas it was significantly increased in both nucleus and cytoplasm in the VU treatment groups.

Conclusions

Anthocyanins extracted from VU could reduce apoptosis, stabilize cell membrane, and alleviate oxidant injury of mouse retinal photoreceptor 661W cells. The mechanism might be through activating Nrf2/HO-1 signal pathway and inducing HO-1 transcription and translation.

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Authors and Affiliations

  1. Department of Ophthalmology, Chinese PLA General Hospital, Beijing, 100853, China

    Lan Yin &  Mao-nian Zhang

  2. Department of Ophthalmology, PLA Rocket Characteristic Medical Center, Beijing, 100853, China

    Si-jun Fan

Authors
  1. Lan Yin
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  2. Si-jun Fan
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  3. Mao-nian Zhang
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Contributions

Yin L contributed to the conception of the study; Yin L and Fan SJ conducted the experiment and wrote the manuscript; Zhang MN analyzed the data. All author read the paper and approved the final version for publication.

Corresponding author

Correspondence to Mao-nian Zhang.

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The authors declare that they have no conflict of interests.

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Yin, L., Fan, Sj. & Zhang, Mn. Protective Effects of Anthocyanins Extracted from Vaccinium Uliginosum on 661W Cells Against Microwave-Induced Retinal Damage. Chin. J. Integr. Med. 28, 620–626 (2022). https://doi.org/10.1007/s11655-021-3527-y

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  • DOI: https://doi.org/10.1007/s11655-021-3527-y

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