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Hypoxia stimulates invasion and migration of human cervical cancer cell lines HeLa/SiHa through the Rab11 trafficking of integrin αvβ3/FAK/PI3K pathway-mediated Rac1 activation

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Abstract

Hypoxia plays a key role in tumour cell survival, invasion, and metastasis. An increasing number of studies have attempted to characterize the tumour response to hypoxia and to identify predictive markers of disease. Here we show that hypoxia increases tumour cell invasion and migration by the modulation of Rab11, an important molecule for vesicular trafficking. In our study, we found that Rab11, together with the activation of Rac1, could stimulate invasion and migration of cervical cancer cell lines HeLa/SiHa in hypoxia. Activation of Rac1 activity by hypoxia seems to be central to carcinoma invasion. We also found that these effects could be related to the integrin αvβ3. In addition, we studied the molecular pathway for this process. Our results showed that in cervical cancer cell lines HeLa/SiHa, Rac1 activation in hypoxia could stimulate invasion and migration, and this process was mediated by integrin αvβ3-mediated FAK and PI3K phosphorylation. Furthermore, hypoxia induced a dramatic increase in αvβ3 integrin surface expression, and this increase is dependent on Rab11. In conclusion, our study might provide a new mechanism for the effect of hypoxia on stimulating cervical carcinoma invasion.

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Authors and Affiliations

  1. Department of Radiotherapy, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, China

    Hao Xu, Qian Jiang, Jiayin Ji, Longzhen Zhang & Xia Wang

  2. Department of Oncology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, China

    Yuan Yuan

  3. Department of Immunology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, China

    Wenqian Wu

  4. Intensive Care Unit, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, China

    Min Zhou

  5. Department of Interventional Radiology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, China

    Linjun Niu

  6. Tumor Biological Therapy Institute, Xuzhou Medical University, Xuzhou, China

    Nianli Liu

Authors
  1. Hao Xu
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  2. Yuan Yuan
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  3. Wenqian Wu
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  4. Min Zhou
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  5. Qian Jiang
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  6. Linjun Niu
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  7. Jiayin Ji
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  8. Nianli Liu
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  9. Longzhen Zhang
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  10. Xia Wang
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Corresponding author

Correspondence to Xia Wang.

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Corresponding editor: Sorab Dalal

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Xu, H., Yuan, Y., Wu, W. et al. Hypoxia stimulates invasion and migration of human cervical cancer cell lines HeLa/SiHa through the Rab11 trafficking of integrin αvβ3/FAK/PI3K pathway-mediated Rac1 activation. J Biosci 42, 491–499 (2017). https://doi.org/10.1007/s12038-017-9699-0

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  • DOI: https://doi.org/10.1007/s12038-017-9699-0

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