Ge L, Zhang JG, Samathanam CA, Delgado C, Tarbiyat-Boldaji M, Dan Q, Hoa N, Nguyen TV, Alipanah R, Pham JTH, Sanchez R, Wepsic HT, Morgan TR, Jadus MR. Cytotoxic T cell immunity against the non-immunogenic, murine, hepatocellular carcinoma Hepa1-6 is directed towards the novel alternative form of macrophage colony stimulating factor.
Cell Immunol 2009;
259:117-27. [PMID:
19615673 DOI:
10.1016/j.cellimm.2009.06.008]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2009] [Revised: 06/09/2009] [Accepted: 06/10/2009] [Indexed: 01/04/2023]
Abstract
Mouse Hepa1-6 hepatocellular carcinoma (HCC) cells were transduced with the membrane form of macrophage colony stimulating factor (mM-CSF). When mM-CSF transduced Hepa1-6 cells were injected subcutaneously into mice, these cells did not form tumors. The spleens of these immunized mice contained cytotoxic CD8+ T lymphocytes (CTL) that killed the unmodified Hepa1-6 cells. We show that the alternative form of macrophage colony stimulating factor (altM-CSF) induced CTL-mediated immunity against Hepa1-6 cells. AltM-CSF is restricted to the H-2D(b) allele. CTLs killed RMA-S cells loaded with exogenous altM-CSF peptide. Vaccination of mice with dendritic cells pulsed with the altM-CSF peptide stimulated anti-Hepa1-6 CTLs. Hyper-immunization of mice with mM-CSF Hepa1-6 cells showed inflammation of the liver and kidneys. Although altM-CSF was expressed within liver and kidney cells, its intensity was lower than Hepa1-6 cells. AltM-CSF was detected within the human HepG2 cell line. These studies suggest that altM-CSF may be a tumor antigen for HCC.
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