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Down-regulation of beta-centractin might be involved in dendritic cells dysfunction and subsequent hepatocellular carcinoma immune escape: a proteomic study.

AbstractAIMS:
Proteomic study was used to clarify the mechanism of hepatocellular carcinoma (HCC) immune escape concerning Dendritic cells (DCs') dysfunction and their association with HCC invasion.
METHODS:
Human peripheral blood mononuclear cells (PBMCs) derived DCs from healthy donors were pulsed with soluble cell lysates prepared from different metastatic potential human HCC cell lines. The total protein of these DCs was analyzed by two-dimensional electrophoresis and Electro-Spray Mass Spectrometry. The allostimulatoy capacity and phenotype of these DCs were also evaluated. The clinical significance of beta-centractin, one of the largest quantitative changed spot, down-regulation in DCs was further evaluated in autologous PBMCs derived DCs pulsed with auto-tumor lysates in 26 HCC patients.
RESULTS:
The expression of beta-centractin was found to be considerably lower either in DCs pulsed with HCCLM6 (high metastatic potential HCC cell line) lysates, accompanied by down-regulation of CD86 molecule and impaired allostimulatory capacity, than those of DCs pulsed with lysates from HCC cell lines with low or without metastatic potential or in DCs pulsed with lysates from HCC with invasiveness than those without invasiveness.
CONCLUSIONS:
The down-regulation of beta-centractin in DCs pulsed with high metastatic potential HCC lysates might associate with DCs dysfunction and HCC invasiveness.
AuthorsYong-Qiang Weng, Shuang-Jian Qiu, Yin-Kun Liu, Jia Fan, Qiang Gao, Zhao-You Tang
JournalJournal of cancer research and clinical oncology (J Cancer Res Clin Oncol) Vol. 134 Issue 2 Pg. 179-86 (Feb 2008) ISSN: 1432-1335 [Electronic] Germany
PMID17619203 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
Chemical References
  • Actins
  • centractin
Topics
  • Actins (metabolism)
  • Blotting, Western
  • Carcinoma, Hepatocellular (immunology, parasitology)
  • Dendritic Cells (immunology, pathology)
  • Down-Regulation
  • Humans
  • Liver Neoplasms (immunology, pathology)
  • Proteomics
  • Spectrometry, Mass, Electrospray Ionization
  • T-Lymphocytes (immunology, metabolism, pathology)
  • T-Lymphocytes, Cytotoxic (immunology)
  • Tumor Cells, Cultured (immunology, metabolism, pathology)

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