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Comparative proteomics and molecular mechanical analysis in CDA-II induced therapy of LCI-D20 hepatocellular carcinoma model

  • Hui-zhi Fan
  • Hang Liu
  • Chen Zhang
  • Dong-mei Gao
  • Qun Xue
  • Jun Chen
  • Rui-xia Sun
  • Yin-kun LiuEmail author
  • Peng-yuan YangEmail author
Original Paper

Abstract

Purpose

To investigate the differential proteins and related molecular mechanism of CDA-II (cell differentiation agent-II) induced therapy on a human hepatocellular carcinoma model in nude mice with high metastatic potential (LCI-D20).

Methods

After tumors were transplanted 11 days, mice were intraperitoneally injected with CDA-II (1,800 mg/kg) for 20 days continuously. The tumor growth-inhibitory efficiency in CDA-II treated groups was calculated. Proteins extracted from tumor tissue were separated by two-dimensional gel electrophoresis (2DE) and the differential proteins were identified by matrix assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF-MS). Western blotting (WB) was performed to verify the expression of certain candidate proteins. Reverse transcription-polymerase chain reaction (RT-PCR) was engaged to study the molecular mechanism of the therapy.

Results

CDA-II suppressed the growth and metastasis of tumor. The tumor growth-inhibitory efficiency was 41.8%. In total, 27 differentially expressed proteins were identified, including HSP27, UGDH, CK8, Hsp60, ENOA and AnxA5, with functions involved in oncogene expression and/or cell differentiation. In addition, apparent alternations of HSP60 and β-actin expression levels and their different posttranslational modifications (PTMs) were investigated. RT-PCR analysis confirmed that the cancer related genes c-myc, N-ras and MMP-9 were significantly down-regulated.

Conclusion

Our results demonstrate that CDA-II presence can change the proteome profiling and favors of the tumor suppression in LCI-D20 cell differentiation. Our results also suggest that the dynamic PTM of HSP60 expression levels could be used to predict HCC and might be a promising and useful biomarker to prognosticate CDA-II therapeutic efficacy.

Keywords

Carcinoma Hepatocellular Neoplasm metastasis Cell differentiation Proteomics Molecular mechanisms of action 

Abbreviations

CDA-II

Cell differentiation agent II

HCC

Hepatocellular carcinoma

LCI-D20

A nude mice model for human HCC with high metastatic potential (Liver Cancer Institute, passage time 20 days)

2DE

Two dimensional gel electrophoresis

MS

Mass spectrometry

RT-PCR

Reverse transcription-polymerase chain reaction

MALDI-TOF-MS

Matrix assisted laser desorption/ionization-time of flight mass spectrometry

Notes

Acknowledgments

This study was supported by National Natural Science Foundation of China (Grant No. 20675020), National 863 Program (2006AA02A308, 2007AA02Z479) and Shanghai Science and Technology Development Program (03DZ14024).

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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • Hui-zhi Fan
    • 1
    • 2
  • Hang Liu
    • 1
  • Chen Zhang
    • 3
  • Dong-mei Gao
    • 2
  • Qun Xue
    • 2
  • Jun Chen
    • 2
  • Rui-xia Sun
    • 2
  • Yin-kun Liu
    • 2
    • 3
    Email author
  • Peng-yuan Yang
    • 1
    • 3
    Email author
  1. 1.Chemistry Department of Fudan UniversityShanghaiChina
  2. 2.Liver Cancer Institute, Zhongshan HospitalFudan UniversityShanghaiChina
  3. 3.Institute of Biomedical SciencesFudan UniversityShanghaiChina

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