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J Surg Res. 2012 Jan;172(1):116-22. doi: 10.1016/j.jss.2010.07.057. Epub 2010 Sep 17.

Vitamin D binding protein-macrophage activating factor inhibits HCC in SCID mice.

Author information

1
Clinical Research Center, National Hospital Organization Nagasaki Medical Center, Department of Hepatology, Nagasaki University Graduate School of Biomedical Sciences, Omura, Japan. kknonaka@mbn.nifty.com

Abstract

BACKGROUND:

A high incidence of recurrence after treatment is the most serious problem in hepatocellular carcinoma (HCC). Therefore, a new strategy for the treatment of the disease is needed. The aim of the present study was to investigate whether vitamin D binding protein-macrophage activating factor (DBP-maf) is able to inhibit the growth of HCC.

METHODS:

The effects of DBP-maf on endothelial cells and macrophage were evaluated by WST-1 assay and phagocytosis assay, respectively. Human HCC cells (HepG2) were implanted into the dorsum of severe combined immunodeficiency (SCID) mice. These mice were divided into control and DBP-maf treatment groups (n = 10/group). The mice in the treatment group received 40 ng/kg/d of DBP-maf for 21 d.

RESULTS:

DBP-maf showed anti-proliferative activity against endothelial cells and also activated phagocytosis by macrophages. DBP-maf inhibited the growth of HCC cells (treatment group: 126 ± 18mm(3), untreated group: 1691.5 ± 546.9mm(3), P = 0.0077). Histologic examinations of the tumors revealed the microvessel density was reduced and more macrophage infiltration was demonstrated in the tumor of mice in the treatment group.

CONCLUSION:

DBP-maf has at least two novel functions, namely, an anti-angiogenic activity and tumor killing activity through the activation of macrophages. DBP-maf may therefore represent a new strategy for the treatment of HCC.

PMID:
20855083
DOI:
10.1016/j.jss.2010.07.057
[Indexed for MEDLINE]

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