Liposomal formulation of polyacrylate-peptide conjugate as a new vaccine candidate against cervical cancer

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Toth, Istvan
Khongkow, Mattaka
Liu, Tzu-yu
Bartlett, Stacey
Hussein, Waleed M
Nevagi, Reshma
Jia, Zhogfan
Monteiro, Michael J
Wells, James
Ruktanonchai, Uracha Rungsardthong
Skwarczynski, Mariusz
Griffith University Author(s)
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2018
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https://creativecommons.org/licenses/by-nc-sa/4.0/
Abstract

Peptide-based vaccines have been proposed as a therapeutic strategy for many infectious diseases, including human papilloma virus (HPV)-related cervical cancer. Peptide-based vaccines are a better treatment option than traditional chemotherapeutic agents and surgery, as they rely on the use of the body’s immune system to fight cancer cells, resulting in minimal risk of side effects. However, to increase the efficacy of peptide-based vaccines, the application of potent adjuvant and a suitable delivery system is essential. In this study, we developed a self-adjuvating delivery system based on a combination of polymer and liposomes, for a therapeutic vaccine against cervical cancer. Peptide epitope (8Qm) derived from HPV-16 E7 protein was conjugated to dendritic poly(tert-butyl acrylate) as a primary delivery system and incorporated into cationic liposomes, which served as a secondary delivery system. Our vaccine candidate was able to kill established HPV-16 E7-positive tumor (TC-1) cells in mice following a single immunization. The immunized mice had 80% survival rate after two months. In contrast, both polymer-8Qm conjugate and liposomes bearing 8Qm failed to eradicate TC-1 tumors. The survival rate of mice was only 20% when immunized with 8Qm formulated with standard incomplete Freund’s adjuvant.

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Precision Nanomedicine
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1
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3
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© The Author(s) 2018. This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) License, which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited. If you alter, transform, or build upon this work, you may distribute the resulting work only under a licence identical to this one.
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Oncology and Carcinogenesis
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Toth, I; Khongkow, M; Liu, T-Y; Bartlett, S; Hussein, WM; Nevagi, R; Jia, Z; Monteiro, MJ; Wells, J; Ruktanonchai, UR; Skwarczynski, M, Liposomal formulation of polyacrylate-peptide conjugate as a new vaccine candidate against cervical cancer, Precision Nanomedicine, 1 (3), pp. 183-193
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