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Mol Cancer Ther. 2017 Feb;16(2):312-322. doi: 10.1158/1535-7163.MCT-16-0124. Epub 2016 Dec 15.

Blocking the CCL2-CCR2 Axis Using CCL2-Neutralizing Antibody Is an Effective Therapy for Hepatocellular Cancer in a Mouse Model.

Teng KY1,2,3, Han J3, Zhang X4, Hsu SH2,3, He S3,5,6, Wani NA2,3,7, Barajas JM2,3, Snyder LA8, Frankel WL2,3, Caligiuri MA3,5, Jacob ST3,5,7, Yu J9,5, Ghoshal K10,3,7.

Author information

1
Molecular, Cellular and Developmental Biology Program, The Ohio State University, Columbus, Ohio.
2
Department of Pathology, The Ohio State University, Columbus, Ohio.
3
Comprehensive Cancer Center, Wexner Medical Center, The Ohio State University, Columbus, Ohio.
4
Center for Biostatistics, The Ohio State University, Columbus, Ohio.
5
Virology, Immunology and Medical Genetics, The Ohio State University, Columbus, Ohio.
6
Center for Systems Biology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts.
7
Department of Molecular and Cellular Biochemistry, The Ohio State University, Columbus, Ohio.
8
Janssen Research and Development, LLC, Spring House, Pennsylvania.
9
Comprehensive Cancer Center, Wexner Medical Center, The Ohio State University, Columbus, Ohio. kalpana.ghoshal@osumc.edu Jianhua.Yu@osumc.edu.
10
Department of Pathology, The Ohio State University, Columbus, Ohio. kalpana.ghoshal@osumc.edu Jianhua.Yu@osumc.edu.

Abstract

Hepatocellular carcinoma, a deadly disease, commonly arises in the setting of chronic inflammation. C-C motif chemokine ligand 2 (CCL2/MCP1), a chemokine that recruits CCR2-positive immune cells to promote inflammation, is highly upregulated in hepatocellular carcinoma patients. Here, we examined the therapeutic efficacy of CCL2-CCR2 axis inhibitors against hepatitis and hepatocellular carcinoma in the miR-122 knockout (a.k.a. KO) mouse model. This mouse model displays upregulation of hepatic CCL2 expression, which correlates with hepatitis that progress to hepatocellular carcinoma with age. Therapeutic potential of CCL2-CCR2 axis blockade was determined by treating KO mice with a CCL2-neutralizing antibody (nAb). This immunotherapy suppressed chronic liver inflammation in these mice by reducing the population of CD11highGr1+ inflammatory myeloid cells and inhibiting expression of IL6 and TNFα in KO livers. Furthermore, treatment of tumor-bearing KO mice with CCL2 nAb for 8 weeks significantly reduced liver damage, hepatocellular carcinoma incidence, and tumor burden. Phospho-STAT3 (Y705) and c-MYC, the downstream targets of IL6, as well as NF-κB, the downstream target of TNFα, were downregulated upon CCL2 inhibition, which correlated with suppression of tumor growth. In addition, CCL2 nAb enhanced hepatic NK-cell cytotoxicity and IFNγ production, which is likely to contribute to the inhibition of tumorigenesis. Collectively, these results demonstrate that CCL2 immunotherapy could be an effective therapeutic approach against inflammatory liver disease and hepatocellular carcinoma. Mol Cancer Ther; 16(2); 312-22.

PMID:
27980102
PMCID:
PMC5292068
DOI:
10.1158/1535-7163.MCT-16-0124
[Indexed for MEDLINE]
Free PMC Article

Conflict of interest statement

The authors disclose no conflicts.

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