Complex TNF-α B cell epitope MAP vaccine alleviates murine ulcerative colitis

  • Authors:
    • Yan Sun
    • Wensheng Pan
    • Jun Zhang
    • Ying Cui
    • Huiju Wang
    • Guoqing Ru
    • Legao Chen
  • View Affiliations

  • Published online on: July 8, 2019     https://doi.org/10.3892/ijmm.2019.4271
  • Pages: 1106-1116
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Abstract

The present study aimed to develop a tumor necrosis factor‑α (TNF‑α) B‑cell epitope/IL‑1β helper T lymphocyte epitope complex MAP vaccine for the alleviation of ulcerative colitis (UC) in mice. The B cell epitopes of murine TNF‑α (mTNF‑α) were predicted in silico and coupled with the universal interleukin 1β (IL‑1β) helper T‑cell epitope peptide VQGEESNDK to synthesize the eight‑branched MAP vaccine. Then, the immunological effects of the MAP vaccine were assessed in vitro and in vivo, as well as its impacts on DAI index, serum DAO levels, colon tissue tight junction protein amounts, ultrastructural changes, and MPO activity in BALB/c mice with UC. The amino acids LTLRSSSQNSSDKPV at positions 78‑92 of mTNF‑α may constitute the dominant B cell epitope. Based on this finding, an eight‑branched peptide structure, the TNF‑α B‑cell epitope/IL‑1β helper T‑cell epitope complex MAP vaccine, was synthesized. Indirect ELISA confirmed that MAP had a high affinity with commercialized mTNF‑α antibodies. Meanwhile, MAP induced high specific antibody titers in vivo, reduced the DAI score, serum MPO activity, colorectal lymph node colony count, ultrastructural injuries, colon tissue histological index score and MPO activity in UC mice, while increasing the expression levels of occludin, claudin1 and ZO1 in colon tissues. The synthetic complex MAP vaccine has good antigenicity and immunogenicity, and can alleviate UC in mouse models.
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September-2019
Volume 44 Issue 3

Print ISSN: 1107-3756
Online ISSN:1791-244X

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Spandidos Publications style
Sun Y, Pan W, Zhang J, Cui Y, Wang H, Ru G and Chen L: Complex TNF-α B cell epitope MAP vaccine alleviates murine ulcerative colitis. Int J Mol Med 44: 1106-1116, 2019.
APA
Sun, Y., Pan, W., Zhang, J., Cui, Y., Wang, H., Ru, G., & Chen, L. (2019). Complex TNF-α B cell epitope MAP vaccine alleviates murine ulcerative colitis. International Journal of Molecular Medicine, 44, 1106-1116. https://doi.org/10.3892/ijmm.2019.4271
MLA
Sun, Y., Pan, W., Zhang, J., Cui, Y., Wang, H., Ru, G., Chen, L."Complex TNF-α B cell epitope MAP vaccine alleviates murine ulcerative colitis". International Journal of Molecular Medicine 44.3 (2019): 1106-1116.
Chicago
Sun, Y., Pan, W., Zhang, J., Cui, Y., Wang, H., Ru, G., Chen, L."Complex TNF-α B cell epitope MAP vaccine alleviates murine ulcerative colitis". International Journal of Molecular Medicine 44, no. 3 (2019): 1106-1116. https://doi.org/10.3892/ijmm.2019.4271