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Lambda phage-based vaccine induces antitumor immunity in hepatocellular carcinoma.

ABSTRACT: BACKGROUND AND AIMS:Hepatocellular carcinoma (HCC) is a difficult to treat tumor with a poor prognosis. Aspartate ?-hydroxylase (ASPH) is a highly conserved enzyme overexpressed on the cell surface of both murine and human HCC cells. METHODS:We evaluated therapeutic effects of nanoparticle lambda (?) phage vaccine constructs against ASPH expressing murine liver tumors. Mice were immunized before and after subcutaneous implantation of a syngeneic BNL HCC cell line. Antitumor actively was assessed by generation of antigen specific cellular immune responses and the identification of tumor infiltrating lymphocytes. RESULTS:Prophylactic and therapeutic immunization significantly delayed HCC growth and progression. ASPH-antigen specific CD4+ and CD8+ lymphocytes were identified in the spleen of tumor bearing mice and cytotoxicity was directed against ASPH expressing BNL HCC cells. Furthermore, vaccination generated antigen specific Th1 and Th2 cytokine secretion by immune cells. There was widespread necrosis with infiltration of CD3+ and CD8+ T cells in HCC tumors of ? phage vaccinated mice compared to controls. Moreover, further confirmation of anti-tumor effects on ASPH expressing tumor cell growth were obtained in another murine syngeneic vaccine model with pulmonary metastases. CONCLUSIONS:These observations suggest that ASPH may serve as a highly antigenic target for immunotherapy.

SUBMITTER: Iwagami Y

PROVIDER: S-EPMC5619992 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature

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Lambda phage-based vaccine induces antitumor immunity in hepatocellular carcinoma.

Iwagami Yoshifumi Y Casulli Sarah S Nagaoka Katsuya K Kim Miran M Carlson Rolf I RI Ogawa Kosuke K Lebowitz Michael S MS Fuller Steve S Biswas Biswajit B Stewart Solomon S Dong Xiaoqun X Ghanbari Hossein H Wands Jack R JR

Heliyon 20170926 9

<h4>Background and aims</h4>Hepatocellular carcinoma (HCC) is a difficult to treat tumor with a poor prognosis. Aspartate β-hydroxylase (ASPH) is a highly conserved enzyme overexpressed on the cell surface of both murine and human HCC cells.<h4>Methods</h4>We evaluated therapeutic effects of nanoparticle lambda (λ) phage vaccine constructs against ASPH expressing murine liver tumors. Mice were immunized before and after subcutaneous implantation of a syngeneic BNL HCC cell line. Antitumor active ...[more]

PMID: 28971150

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Project description:BACKGROUND:Immunomodulatory agents that induce antitumor immunity have great potential for treatment of cancer. We have previously shown that interleukin (IL)-31, a proinflammatory cytokine from the IL-6 family, acts as an antiangiogenic agent. Here, we characterize the immunomodulatory effect of IL-31 in breast cancer. METHODS:In vivo breast carcinoma models including EMT6 and PyMT cell lines were used to analyze the effect of IL-31 on the composition of various immune cells in the tumor microenvironment using high-throughput flow cytometry. In vitro studies using isolated cytotoxic T cells, CD4+ T cells, myeloid-derived suppressor cells (MDSCs) and macrophages were carried out to study IL-31 immunological activity. The generation of recombinant IL-31 bound to IgG backbone was used to test IL-31 therapeutic activity. RESULTS:The growth rate of IL-31-expressing breast carcinomas is decreased in comparison with control tumors due, in part, to antitumor immunomodulation. Specifically, cytotoxic T cell activity is increased, whereas the levels of CD4+ T cells, MDSCs, and tumor-associated macrophages are decreased in IL-31-expressing tumors. These cellular changes are accompanied by a cytokine profile associated with antitumor immunity. In vitro, IL-31 directly inhibits CD4+ Th0 cell proliferation, and the expression of Th2 canonical factors GATA3 and IL-4. It also promotes CD8+ T cell activation through inhibition of MDSC activity and motility. Clinically, in agreement with the mouse data, alterations in immune cell composition in human breast cancer biopsies were found to correlate with high expression of IL-31 receptor A (IL-31Ra) . Furthermore, high coexpression of IL-31Ra, IL-2 and IL-4 in tumors correlates with increased survival. Lastly, to study the therapeutic potential of IL-31, a recombinant murine IL-31 molecule was fused to IgG via a linker region (IL-31-L-IgG). This IL-31-L-IgG therapy demonstrates antitumor therapeutic activity in a murine breast carcinoma model. CONCLUSIONS:Our findings demonstrate that IL-31 induces antitumor immunity, highlighting its potential utility as a therapeutic immunomodulatory agent.

Dataset Information

Lambda phage-based vaccine induces antitumor immunity in hepatocellular carcinoma.

Publications

Lambda phage-based vaccine induces antitumor immunity in hepatocellular carcinoma.

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