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Knockdown of zinc finger protein, X-linked (ZFX) inhibits cell proliferation and induces apoptosis in human laryngeal squamous cell carcinoma

Molecular and Cellular Biochemistry volume 360, pages 301–307 (2012)Cite this article

Abstract

ZFX (zinc finger protein, X-linked) gene locus on the human X chromosome is structurally similar to the zinc finger protein, Y-linked gene, which may constitute the primary sex-determining signal. However, the pathological roles of the dysfunction of ZFX gene in human disease such as cancer have not been addressed. Here, we analyzed the expression of ZFX in human laryngeal squamous cell carcinoma (LSCC) tissue specimens and found a significant up-regulation compared to corresponding non-tumorous LSCC tissue. Recombinant lentivirus expressing ZFX short hairpin RNA (shZFX) was constructed and infected Hep-2 human LSCC cells. We found that knockdown of ZFX gene resulted in suppression of proliferation and colony-forming ability of Hep-2 cells, and led to S phase cell cycle arrest. In addition, down-regulation of ZFX induced a significant enhancement of cell apoptosis and expression changes of apoptosis-related genes. These results suggest that high expression of ZFX is associated with LSCC progression and knockdown of ZFX may block tumor cell growth mainly by promoting cell apoptosis.

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Acknowledgment

The authors are thankful for the financial support from National Natural Science Foundation of China (81072204).

Author information

Affiliations

  1. Department of Otolaryngology, Head and Neck Surgery, Beijing TongRen Hospital, Capital Medical University, No. 1 Dong Jiao Min Xiang, Eastern District, Beijing, 100730, People’s Republic of China

    Jugao Fang, Zhenkun Yu, Meng Lian, Hongzhi Ma, Jun Tai, Luo Zhang & Demin Han

  2. Key Laboratory of Otolaryngology, Head and Neck Surgery (Ministry of Education of China), Beijing Institute of Otorhinolaryngology, No. 17 Hou Gou Lane, Chong Nei Street, Beijing, 100005, People’s Republic of China

    Jugao Fang, Zhenkun Yu, Meng Lian, Hongzhi Ma, Jun Tai, Luo Zhang & Demin Han

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  1. Jugao Fang
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  2. Zhenkun Yu
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  3. Meng Lian
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  4. Hongzhi Ma
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  5. Jun Tai
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  6. Luo Zhang
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  7. Demin Han
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Corresponding authors

Correspondence to Luo Zhang or Demin Han.

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Demin Han and Luo Zhang are contributed equally to this study.

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11010_2011_1069_MOESM1_ESM.tif

Effect of pGCSIL-GFP-shZFX′ lentivirus infection on Hep-2 cell growth. a Cell count assay. ZFX knockdown suppressed the growth of Hep-2 cells. b Colony formation assay. ZFX knockdown inhibited colony-forming capacity of Hep-2 cells. c Analysis of cell cycle by flow cytometry. ZFX knockdown induced cell cycle arrest at S-phase. d Flow cytometric analysis of Annexin V-APC staining. ZFX knockdown induced Hep-2 cell apoptosis. The value represents the mean from three independent experiments; bars, SD. *P < 0.05, **P < 0.01, ***P < 0.001, in comparison with control. (TIFF 204 kb)

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Fang, J., Yu, Z., Lian, M. et al. Knockdown of zinc finger protein, X-linked (ZFX) inhibits cell proliferation and induces apoptosis in human laryngeal squamous cell carcinoma. Mol Cell Biochem 360, 301–307 (2012). https://doi.org/10.1007/s11010-011-1069-x

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  • DOI: https://doi.org/10.1007/s11010-011-1069-x

Keywords

  • ZFX
  • Laryngeal squamous cell carcinoma
  • Cell growth
  • Apoptosis