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Article

Peptide mimics of a carbohydrate‑associated epitope expressed by cancer cells: Identification of vaccine candidates

  • Authors:
    • Liyan Wen
    • Sha Yang
    • Ping Zhu
    • Yingxin Yu
    • Xiaoyan Qiu
    • Ning Fu
    • Yanjun Liu
  • View Affiliations / Copyright

    Affiliations: Department of Immunology, School of Basic Medical Science, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China, Department of Immunology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, P.R. China
  • Pages: 5237-5244
    |
    Published online on: October 19, 2016
       https://doi.org/10.3892/mmr.2016.5863
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Abstract

Cancer-associated antigen 215 (CA215) is an immunoglobulin molecule expressed by numerous tumor types. Membrane‑bound and soluble CA215 have been detected in the majority of cancer cells and rarely identified in normal tissues. In addition, CA215C is a carbohydrate‑associated epitope in the variable region of CA215, which is specifically recognized by the monoclonal antibody, RP215. However, CA215C is not a suitable vaccine candidate as it is a thymus‑independent antigen. In the present study, RP215 was used as a target to screen short peptide mimics of CA215C from a phage display peptide library. Following three rounds of screening, 30 positive phage clones that specifically bound to RP215 were identified and sequenced. The result of amino‑acid sequence analysis revealed five conserved sequence groups for seventeen of the positive phage clones. The sequences of phage clones 2, 13 and 42 were selected for peptide synthesis and binding analysis. The synthetic peptides R2 and R42 specifically bound RP215. Antisera from mice immunized with R2‑BSA or R42‑BSA bound purified CA215C and innate CA215C expressed on human hepatic and rectal carcinoma tissues, as demonstrated by immunohistochemistry. Furthermore, R2‑BSA and R42‑BSA antisera inhibited RP215 binding to cancer tissues. These results revealed that R2‑BSA and R42‑BSA antisera had similar characteristics to RP215 and that the synthetic peptides R2 and R42 may mimic the CA215C epitope. R2 and R42 peptides may therefore have potential for development into a tumor vaccine.
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Copy and paste a formatted citation
Spandidos Publications style
Wen L, Yang S, Zhu P, Yu Y, Qiu X, Fu N and Liu Y: Peptide mimics of a carbohydrate‑associated epitope expressed by cancer cells: Identification of vaccine candidates. Mol Med Rep 14: 5237-5244, 2016.
APA
Wen, L., Yang, S., Zhu, P., Yu, Y., Qiu, X., Fu, N., & Liu, Y. (2016). Peptide mimics of a carbohydrate‑associated epitope expressed by cancer cells: Identification of vaccine candidates. Molecular Medicine Reports, 14, 5237-5244. https://doi.org/10.3892/mmr.2016.5863
MLA
Wen, L., Yang, S., Zhu, P., Yu, Y., Qiu, X., Fu, N., Liu, Y."Peptide mimics of a carbohydrate‑associated epitope expressed by cancer cells: Identification of vaccine candidates". Molecular Medicine Reports 14.6 (2016): 5237-5244.
Chicago
Wen, L., Yang, S., Zhu, P., Yu, Y., Qiu, X., Fu, N., Liu, Y."Peptide mimics of a carbohydrate‑associated epitope expressed by cancer cells: Identification of vaccine candidates". Molecular Medicine Reports 14, no. 6 (2016): 5237-5244. https://doi.org/10.3892/mmr.2016.5863
Copy and paste a formatted citation
x
Spandidos Publications style
Wen L, Yang S, Zhu P, Yu Y, Qiu X, Fu N and Liu Y: Peptide mimics of a carbohydrate‑associated epitope expressed by cancer cells: Identification of vaccine candidates. Mol Med Rep 14: 5237-5244, 2016.
APA
Wen, L., Yang, S., Zhu, P., Yu, Y., Qiu, X., Fu, N., & Liu, Y. (2016). Peptide mimics of a carbohydrate‑associated epitope expressed by cancer cells: Identification of vaccine candidates. Molecular Medicine Reports, 14, 5237-5244. https://doi.org/10.3892/mmr.2016.5863
MLA
Wen, L., Yang, S., Zhu, P., Yu, Y., Qiu, X., Fu, N., Liu, Y."Peptide mimics of a carbohydrate‑associated epitope expressed by cancer cells: Identification of vaccine candidates". Molecular Medicine Reports 14.6 (2016): 5237-5244.
Chicago
Wen, L., Yang, S., Zhu, P., Yu, Y., Qiu, X., Fu, N., Liu, Y."Peptide mimics of a carbohydrate‑associated epitope expressed by cancer cells: Identification of vaccine candidates". Molecular Medicine Reports 14, no. 6 (2016): 5237-5244. https://doi.org/10.3892/mmr.2016.5863
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