Abstract
Epstein–Barr virus immediate-early protein Zta plays an active role in altering cellular gene expression, which may be fundamentally linked to the viral life cycle, cell cycle, cell growth, and differentiation. HER2 is associated with a wide variety of human cancers, and its knockdown significantly reverses the malignant features of HER2-positive cancers. The aim of this study was to investigate the potential role of Zta in regulating HER2 expression and phenotype changes of MDA-MB-453 cells. Our results indicate that ectopic expression of Zta resulted in downregulation of the HER2 protein in cancer cells (MDA-MB-453, SKBR-3, BT474, and SKOV-3). The Zta protein significantly decreased HER2 mRNA and protein expression in MDA-MB-453 cells in a dose-dependent manner. Mechanistically, Zta recognized and targeted the promoter of HER2 gene, reducing the transcriptional activity of the HER2 gene. Zta induced G0/G1 arrest of MDA-MB-453 cells, inhibiting their proliferation and migration activity. These data suggest that Zta may act as a transforming suppressor of the HER2 gene.
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The datasets generated and/or analysed in the current study are available from the corresponding author on reasonable request.
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This work was supported by the Jinan Clinical Medical Science and Technology Innovation Plan (Grant numbers 202019071 and 202019172) and the Shandong Province Medical and Health Technology Development Plan (grant number 202106010191).
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BY and QG contributed to the study conception and design. Material preparation, data collection, and analysis were performed by all authors. The first draft of the manuscript was written by HZ, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Zheng, H., Zhao, H., Zhang, W. et al. Epstein–Barr virus immediate-early protein Zta mediates the proliferation and migration of HER2-overexpressing cancer cells. Arch Virol 168, 150 (2023). https://doi.org/10.1007/s00705-023-05774-x
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DOI: https://doi.org/10.1007/s00705-023-05774-x