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The effect of lactoferrin on ULK1 and ATG13 genes expression in breast cancer cell line MCF7 and bioinformatics studies of protein interaction between lactoferrin and the autophagy initiation complex

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Abstract

Recently, the study of autophagy and its mechanism on the cancer cell growth process has received much attention. lactoferrin (Lf) is a glycoprotein with various biological activities, including antibacterial, antiviral, anti-cancer, etc. In the present study, the effect of different concentrations of lactoferrin on the expression of ULK1 and ATG13 genes was evaluated in breast cancer cell line MCF7 using real-time PCR technique as well as the molecular mechanism of these two genes and their proteins in the autophagy pathway and the relationship between lactoferrin and these proteins were investigated by bioinformatics studies. The result showed that the expression of the ULK1 gene at a concentration of 500 μg/ml of lactoferrin was significantly (P < 0.007) increased compared to the control and two other concentrations. Also, the expression of the ATG13 gene at all three concentrations was not significantly different from each other and compared to the control (P = 0.635). In the immunoblot of ULK1 protein at a concentration of 500 µg, more protein expression was observed. The binding mode of lactoferrin with ULK1, ATG13, and ATG101 proteins was obtained using docking. According to docking results, the N-lobe region of lactoferrin interacts with the PS domain of the ULK1 protein, and the N-lobe region of lactoferrin interacts with the horma domain of the ATG 13 and ATG101 proteins. The results show that lactoferrin, in addition to acting on the gene, interacts with ULK1, ATG13, and ATG101 proteins. Since all three proteins are components of the autophagy initiation complex, lactoferrin can induce autophagy in this way.

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Data availability

The datasets analyzed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

The authors gratefully acknowledge the facility and assistance offered by the Cell and Molecular Biology Lab, Sari Agricultural Sciences and Natural Resources University.

Funding

The present paper was extracted from Fatemeh Moradian’s grant at Sari Agricultural Sciences and Natural Resources University.

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Authors and Affiliations

  1. Department of Basic Sciences, Sari Agricultural Sciences and Natural Resources University, Sari, Iran

    Zahra Karabi & Fatemeh Moradian

  2. Department of Basic Sciences, Hakim Sabzevari University, Sabzevar, Iran

    Mitra Kheirabadi

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Karabi, Z., Moradian, F. & Kheirabadi, M. The effect of lactoferrin on ULK1 and ATG13 genes expression in breast cancer cell line MCF7 and bioinformatics studies of protein interaction between lactoferrin and the autophagy initiation complex. Cell Biochem Biophys 80, 795–806 (2022). https://doi.org/10.1007/s12013-022-01097-x

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