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HOXB8 promotes tumor metastasis and the epithelial–mesenchymal transition via ZEB2 targets in gastric cancer

  • Original Article – Cancer Research
  • Published:
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Abstract

Purpose

The homeobox B8 (HOXB8) functions as a sequence-specific transcription factor that is involved in development. Increased expression of this gene is associated with a wide variety of tumor; however, its function in gastric cancer has not been clarified. In the present study, the expression of HOXB8 in gastric cancer tissues and influence of HOXB8 on gastric cancer cellular were evaluated.

Methods

The expression levels of HOXB8 mRNA in human gastric cancer tissues were analyzed through quantitative RT-PCR. To test the role of HOXB8 in gastric cancer metastasis, the cell transwell assay was performed. Microarray, ChIP-qPCR, and Western blot were used to explore the possible mechanism that HOXB8 promotes gastric cancer cells metastasis.

Results

In this study, we found that HOXB8 showed higher expression in metastatic tissues than no-metastatic tissues. Overexpression of HOXB8 can promote gastric cancer cells migration and invasion, while silencing HOXB8 leads to the opposite results. Overexpression of HOXB8 also increases the rate of metastasis in NCI-N87 mice, while silencing HOXB8 has the opposite results. Furthermore, HOXB8 promotes epithelial–mesenchymal transformation of AGS cells. We also found that ZEB2 can interact with HOXB8 and may be a downstream factor of HOXB8 by using microarray. Knockdown of ZEB2 can inhibit HOXB8-induced migration and invasion capacity, as well as the epithelial–mesenchymal transformation in gastric cancer cells.

Conclusions

The results showed that HOXB8 plays an important role in the development and metastasis of gastric carcinoma.

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Authors’ contributions

WJD extracted mRNA, performed qRT-PCR and WB analyses, and drafted the manuscript. CYQ assisted with data interpretation, designed the project, secured the funding, and drafted the manuscript. MZ and MMC provided patient samples and clinicopathological data. WJD assisted with data interpretation and revised the manuscript. CYQ provided patient samples and clinicopathological data, assisted with data interpretation, and revised the manuscript. All authors have read and approved the final manuscript.

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Corresponding author

Correspondence to Chun-Ying Qu.

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Conflict of interest

All the authors declare that they have no conflict of interest.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the Institutional and/or National Research Committee and with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.

Funding

This study was funded by National Natural Science Foundation of China (No. 81400610); The Project-sponsored by SRF for ROCS, SEM (No. 20144802); Program of Shanghai Municipal Commission of Health and Family Planning for Youth (No. 20134Y043).

Informed consent

Informed consent was obtained from all individual participants included in the study.

Additional information

Wen-Jin Ding and Min Zhou have contributed equally to this work.

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Ding, WJ., Zhou, M., Chen, MM. et al. HOXB8 promotes tumor metastasis and the epithelial–mesenchymal transition via ZEB2 targets in gastric cancer. J Cancer Res Clin Oncol 143, 385–397 (2017). https://doi.org/10.1007/s00432-016-2283-4

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  • DOI: https://doi.org/10.1007/s00432-016-2283-4

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