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Annals of Surgical Oncology

, Volume 17, Issue 6, pp 1703–1709 | Cite as

Glucose-Regulated Protein 78 (GRP78) Silencing Enhances Cell Migration but Does Not Influence Cell Proliferation in Hepatocellular Carcinoma

  • Yu-Jia Chang
  • Chong-Chi Chiu
  • Chih-Hsiung Wu
  • Jane An
  • Cheng-Chia Wu
  • Tsan-Zon Liu
  • Po-Li Wei
  • Ming-Te Huang
Translational Research and Biomarkers

Abstract

Background

GRP78 plays an essential role in embryonic development and in the therapeutic treatment and progression of cancer. However, little is known about the role of GRP78 in hepatocellular carcinoma (HCC).

Methods

In this study, we characterized five different HCC cell lines to examine GRP78 expression patterns and found that only HepJ5 cells ectopically overexpress GRP78. We knocked down GRP78 expression in HepJ5 cells using a small interfering RNA (siRNA), and the proliferation assay and migration assay were performed.

Results

Using siRNA technique, we could successfully reduce GRP78 expression levels in HepJ5 cells. In a cell growth study, we found that GRP78-siRNA caused no significant changes in cellular proliferation in 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT), colony formation, and cell cycle distribution. In a cell migration study, we found that GRP78-siRNA HepJ5 cells had dramatically increased migration ability in Transwell assay.

Conclusions

We conclude that ectopically expressed GRP78 does not contribute to the increased proliferation of HepJ5 cells, but does correlate with the migration of HCC cells under normoxic conditions.

Keywords

Cell Cycle Distribution Ethylene Glycol Tetraacetic Acid Ethylene Glycol Tetraacetic Acid Ethylene Glycol Tetraacetic Acid GRP78 Expression 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgment

This work was supported by a grant from Taipei Medical University/Chi-Mei Medical Grant (96CM-TMU-06).

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Copyright information

© Society of Surgical Oncology 2010

Authors and Affiliations

  • Yu-Jia Chang
    • 1
    • 2
  • Chong-Chi Chiu
    • 3
  • Chih-Hsiung Wu
    • 1
    • 4
  • Jane An
    • 5
  • Cheng-Chia Wu
    • 5
  • Tsan-Zon Liu
    • 2
  • Po-Li Wei
    • 1
    • 2
  • Ming-Te Huang
    • 1
    • 4
  1. 1.Department of SurgeryTaipei Medical UniversityTaipeiTaiwan
  2. 2.Translational Research Laboratory of Cancer Center and Department of SurgeryTaipei Medical University Hospital, Taipei Medical UniversityTaipeiTaiwan
  3. 3.Department of SurgeryChi-Mei Medical CenterTainanTaiwan
  4. 4.Department of SurgeryTaipei Medical University-Shuang Ho HospitalTaipeiTaiwan
  5. 5.New York Medical CollegeValhallaNew York

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