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Involvement of IGF1 in endoplasmic reticulum stress contributes to cataract formation through regulating Nrf2/NF-κB signaling

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Abstract

Endoplasmic reticulum (ER) stress is reportedly involved in the development of ophthalmic diseases. This study aimed to investigate the role and potential mechanism of insulin-like growth factor 1 (IGF1) in ER stress. A mouse cataract model was constructed by subcutaneous injection of sodium selenite, and sh-IGF1 was used to evaluate the effect of silencing IGF1 on cataract progression. Slit-lamp and histological examination of the lens were performed to examine lens damage. The regulatory effects of IGF1 on inflammatory responses, oxidative stress, and ER stress were evaluated using ELISA, reverse transcription-quantitative PCR (RT-qPCR), and immunoblotting analysis. Tunicamycin was used to induce ER stress in the lens of epithelial cells. The NF-E2 related factor-2 (Nrf2) inhibitor ML385 and nuclear factor-κB (NF-κB) agonist diprovocim were used to confirm whether IGF1 regulates inflammation and ER stress through Nrf2/NF-κB signaling. Silencing IGF1 alleviated lens damage and reduced lens turbidity in the cataract mice. Silencing IGF1 inhibited inflammatory response, oxidative stress and ER stress response. Meanwhile, IGF1 was highly expressed in sodium selenite-treated lens epithelial cells. The ER stress agonist tunicamycin suppressed cell viability as well as induced ER stress, oxidative stress and inflammation. Silencing IGF1 increased cell viability, EdU-positive rate and migration. Also, silencing of IGF1 reduced inflammation and ER stress via regulating Nrf2/NF-κB pathway. This study reveals silencing IGF1 attenuated cataract through regulating Nrf2/NF-κB signaling, which shares novel insights into the underlying mechanism of cataract and provides potential therapeutic target for cataract.

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All data in the manuscript is available through the responsible corresponding author.

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Funding

This study was supported by the Natural Science Foundation of Guangdong Province (No. 2016A030313208).

Author information

Author notes

  1. Ruiping Peng and Hongmei Lin contributed equally to this work.

Authors and Affiliations

  1. Department of Ophthalmology, The 3rd Affiliated Hospital, Sun Yat-sen University, No. 600, Tianhe Road, Guangzhou City, 510630, Guangdong Province, China

    Ruiping Peng, Tiancheng Bao, Weili Li & Juan Deng

  2. Health Management Center, The 3rd Affiliated Hospital, Sun Yat-sen University, No. 600, Tianhe Road, Guangzhou City, 510630, Guangdong Province, China

    Hongmei Lin

  3. School of Medicine, Jinan University, No. 601, West Whampoa Avenue, Guangzhou City, 510632, Guangdong Province, China

    Haocheng Zhu

  4. Department of Ophthalmology, Shenzhen University General Hospital, No. 1098, Xueyuan Avenue, Nanshan District, Shenzhen City, 518071, Guangdong Province, China

    Yi Zhang

Authors
  1. Ruiping Peng
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  2. Hongmei Lin
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  3. Haocheng Zhu
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  4. Yi Zhang
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  6. Weili Li
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  7. Juan Deng
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Contributions

Ruiping Peng and Hongmei Lin: Substantial contributions to conception and design, data acquisition, drafting the article;

Haocheng Zhu and Yi Zhang: data acquisition, drafting the article;

Tiancheng Bao, Weili Li and Juan Deng: data acquisition; reviewing the article;

All the authors took part in the experiment.

All the authors read and approved the manuscript.

Corresponding author

Correspondence to Juan Deng.

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Ethical approval and consent to participate

All methods are reported in accordance with ARRIVE guidelines for the reporting of animal experiments. The animal experiments conformed to the Guide for the Care and Use of Laboratory Animals. Animal study has been approved by the Animal Ethics Committee of The 3rd Affiliated Hospital, Sun Yat-sen University. All methods were performed in accordance with Declaration of Helsinki.

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Peng, R., Lin, H., Zhu, H. et al. Involvement of IGF1 in endoplasmic reticulum stress contributes to cataract formation through regulating Nrf2/NF-κB signaling. Funct Integr Genomics 23, 220 (2023). https://doi.org/10.1007/s10142-023-01152-7

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  • DOI: https://doi.org/10.1007/s10142-023-01152-7

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