Abstract
Background
Complement is a central part of both the innate and adaptive immune response and its activation has traditionally been considered part of the immunosurveillance response against cancer. Its pro-inflammatory role and its contribution to the development of many illnesses associated with inflammatory states implicate complement in carcinogenesis.
Methods
We evaluated the role of three protein inhibitors of complement—cobra venom factor, humanized cobra venom factor, and recombinant staphylococcus aureus superantigen-like protein 7—in the setting of a transplantable murine colon cancer model. Outcomes were evaluated by monitoring tumor growth, and flow cytometry, ELISPOT, and quantitative real-time PCR were used to determine the impact of complement inhibition on the host immune response.
Results
Complement inhibitors were effective at depleting complement component C3 in tumor bearing mice and this was temporally correlated with a decreased rate of tumor growth during the establishment of tumors. Treatment with cobra venom factor resulted in increased CD8+ T cells as a percentage of tumor-infiltrating cells as well as a reduced immunosuppressive environment evidenced by decreased myeloid derived suppressor cells in splenocytes of treated mice. Complement inhibition resulted in increased expression of the chemoattractive cytokines CCL5, CXCL10, and CXCL11.
Discussion
Complement depletion represents a promising mode of immunotherapy in cancer by its ability to impair tumor growth by increasing the host’s effective immune response to tumor and diminishing the immunosuppressive effect created by the tumor microenvironment and ultimately could be utilized as a component of combination immunotherapy.





References
Sarma JV, Ward PA. The complement system. Cell Tissue Res. 2011;343:227–35.
Lambris JD, Ricklin D, Geisbrecht BV. Complement evasion by human pathogens. Nat Rev Microbiol. 2008;6:132–42.
Dechant M, Weisner W, Berger S, et al. Complement-dependent tumor cell lysis triggered by combinations of epidermal growth factor receptor antibodies. Cancer Res. 2008;68:4998–5003.
Rutkowski MJ, Sughrue ME, Kane AJ, et al. Cancer and the complement cascade. Mol Cancer Res. 2010;8:1453–65.
Markiewski MM, Lambris JD. Is complement good or bad for cancer patients? A new perspective on an old dilemma. Trends Immunol. 2009;30:286–92.
Nitta H, Murakami Y, Wada Y, et al. Cancer cells release anaphylatoxin C5a from C5 by serine protease to enhance invasiveness. Oncol Rep. 2014;32:1715–9.
Yu J, Caragine T, Chen S, Morgan BP, Frey AB, Tomlinson S. Protection of human breast cancer cells from complement-mediated lysis by expression of heterologous CD59. Clin Exp Immunol. 1999;115:13–8.
Fishelson Z, Donin N, Zell S, Schultz S, Kirschfink M. Obstacles to cancer immunotherapy: expression of membrane complement regulatory proteins (mCRPs). Mol Immunol. 2003;40:109–23.
Kempshall E, Thebault S, Morgan BP, Harris CL, Gallimore A. Complement-induced protectin: an explanation for the limitations of cell-based tumour immunotherapies. Immunol Cell Biol. 2012;90:869–71.
Reiter Y, Ciobotariu A, Fishelson Z. Sublytic complement attack protects tumor-cells from lytic doses of antibody and complement. Eur J Immunol. 1992;22:1207–13.
Reiter Y, Ciobotariu A, Jones J, Morgan BP, Fishelson Z. Complement membrane attack complex, perforin, and bacterial exotoxins induce K562 cells calcium-dependent cross-protection from lysis. J Immunol. 1995;155:2203–10.
Markiewski MM, DeAngelis RA, Benencia F, et al. Modulation of the antitumor immune response by complement. Nat Immunol. 2008;9:1225–35.
Lu Y, Hu XB. C5a stimulates the proliferation of breast cancer cells via Akt-dependent RGC-32 gene activation. Oncol Rep. 2014;32:2817–23.
Niculescu F, Rus HG, Retegan M, Vlaicu R. Persistent complement activation on tumor cells in breast cancer. Am J Pathol. 1992;140:1039–43.
Corrales L, Ajona D, Rafail S, et al. Anaphylatoxin C5a creates a favorable microenvironment for lung cancer progression. J Immunol. 2012;189:4674–83.
Lucas SD, Karlsson-Parra A, Nilsson B, et al. Tumor-specific deposition of immunoglobulin G and complement in papillary thyroid carcinoma. Hum Pathol. 1996;27:1329–35.
Ytting H, Jensenius JC, Christensen IJ, et al. Increased activity of the mannan-binding lectin complement activation pathway in patients with colorectal cancer. Scand J Gastroenterol. 2004;39:674–9.
Gunn L, Ding C, Liu M, et al. Opposing roles for complement component C5a in tumor progression and the tumor microenvironment. J Immunol. 2012;189:2985–94.
Kempshall E, Thebault S, Morgan BP, et al. Complement-induced protection: an explanation for the limitations of cell-based tumour immunotherapies. Immunol Cell Biol. 2012;90:869–71.
Hsieh CC, Chou HS, Yang HR, et al. The role of complement component 3 (C3) in differentiation of myeloid-derived suppressor cells. Blood. 2013;121:1760–8.
Song X, Krelin Y, Dvorkin T, et al. CD11b+/Gr-1+ immature myeloid cells mediate suppression of T cells in mice bearing tumors of IL-1beta-secreting cells. J Immunol. 2005;175:8200–8.
Bunt SK, Sinha P, Clements VK, et al. Inflammation induces myeloid-derived suppressor cells that facilitate tumor progression. J Immunol. 2006;176:284–90.
Obermajer N, Muthuswamy R, Lesnock J, et al. Positive feedback between PGE2 and COX2 redirects the differentiation of human dendritic cells toward stable myeloid-derived suppressor cells. Blood. 2011;118:5498–505.
Obermajer N, Muthuswamy R, Odunsi K, et al. PGE(2)-induced CXCL12 production and CXCR4 expression controls the accumulation of human MDSCs in ovarian cancer environment. Cancer Res. 2011;71:7463–70.
Vogel CW, Fritzinger DC. Cobra venom factor: structure, function, and humanization for therapeutic complement depletion. Toxicon. 2010;56:1198–222.
Hillmen P, Hall C, Marsh JC, et al. Effect of eculizumab on hemolysis and transfusion requirements in patients with paroxysmal nocturnal hemoglobinuria. N Engl J Med. 2004;350:552–9.
Magge D, Guo ZS, O’Malley ME, et al. Inhibitors of C5 complement enhance vaccinia virus oncolysis. Cancer Gene Ther. 2013;20:342–50.
Evgin L, Acuna SA, Tanese de Souza C, et al. Complement inhibition prevents oncolytic vaccinia virus neutralization in immune humans and cynomolgus macaques. Mol Ther. 2015;23:1066–76.
Acknowledgment
Supported in part by U.S. National Institutes of Health (NIH) Grant R01CA155925 (to DLB) and by David C. Koch Regional Therapy Cancer Center. DM and SDC are supported by training grant T32CA113263 from the National Cancer Institute. This project used University of Pittsburgh Cancer Institute shared resources that are supported in part by NIH grant award P30CA047904. Special thanks to Dr. Stephen Thorne’s group at the University of Pittsburgh for providing MC38-luc cells, Dr. John Fraser’s group in Auckland, New Zealand, for their collaboration and for providing SSL7 protein for our study, and Dr. Carl Wilhelm Vogel for collaboration and providing hCVF for our study.
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The authors declare no conflict of interest.
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Stephanie Downs-Canner and Deepa Magge contributed equally to this article.
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10434_2015_4778_MOESM1_ESM.tif
Protein complement inhibitors do not directly target MC38 cells in vitro. (a) Fluorescent microscopy pictures of MC38 luc cells incubated in DMEM/10 %FBS ± CVF, ± hCVF (c), ± SSL7 (e). (b) Viable cell assay following a 48 h incubation period of MC38 cells with or without CVF, ± hCVF (d), ± SSL7 (f). Supplementary material 1 (TIFF 331 kb)
10434_2015_4778_MOESM2_ESM.tif
Complement inhibition with CVF results in altered peripheral lymphoid composition. (a) FACS analysis results comparing the percentage of CD3 + CD8 + granzyme B + cells in the spleens of PBS-treated mice compared to CVF-treated mice demonstrate a higher percentage in PBS-treated mice (48.6 % vs 37.4 %; p value 0.001). (b) Splenocytes from PBS-treated and CVF-treated mice did not show a difference in IFNγ production after a 48-hour incubation with irradiated MC38 cells when evaluated by ELISPOT (3.2 spots/500,000 splenocytes vs 4.4 spots/500,000 splenocytes; p-value 0.3) 7 days after tumor establishment but at day 12 (c) PBS-treated mice demonstrated significantly more spots/500,000 splenocytes compared to CVF-treated mice (7.7 vs 4.4; p-value 0.037). Supplementary material 2 (TIFF 77 kb)
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Downs-Canner, S., Magge, D., Ravindranathan, R. et al. Complement Inhibition: A Novel Form of Immunotherapy for Colon Cancer. Ann Surg Oncol 23, 655–662 (2016). https://doi.org/10.1245/s10434-015-4778-7
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DOI: https://doi.org/10.1245/s10434-015-4778-7