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
Metrics: Total Views: 0 (Spandidos Publications: | PMC Statistics: )
Total PDF Downloads: 0 (Spandidos Publications: | PMC Statistics: )


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.
View Figures
View References

Related Articles

Journal Cover

September 2019
Volume 44 Issue 3

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

Sign up for eToc alerts

Recommend to Library

Copy and paste a formatted citation
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