Wu SS, Tang YY, Wang JL, Chen XH, Zhang Y, Tang ZH, Zang GQ, Yu YS. Mechanism for cytoplasmic transduction peptide-HBcAg
18-27-Tapasin to induce HBV specific CTL response in C57BL/6 mice.
Shijie Huaren Xiaohua Zazhi 2016;
24:2688-2695. [DOI:
10.11569/wcjd.v24.i17.2688]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To observe whether the fusion protein cytoplasmic transduction peptide (CTP) -HBcAg18-27-Tapasin can induce HBV-specific cytotoxic T lymphocyte (CTL) response in C57BL/6 mice via the JAK / STAT pathway.
METHODS: C57BL/6 mice were randomly divided into four groups: CTP-HBcAg18-27-Tapasin alone group, CTP-HBcAg18-27-Tapasin + AG490 group, AG490 alone group, and PBS group. Mice were immunized with the fusion protein through intramuscular injection, and AG490 was administered through intraperitoneal injection. The proliferation of T lymphocytes was observed using CCK-8 assay. The levels of the cytokines secreted by T lymphocytes were detected by ELISA, and the levels of intracellular cytokines of proliferative T lymphocytes were detected by flow cytometry. Expression levels of molecules of the JAK/STAT signal pathway were detected by real-time PCR.
RESULTS: The percentage of CD8+IFN-γ+ T cells, T lymphocytes proliferative activity and the levels of Th1 cytokines in the CTP-HBcAg18-27-Tapasin alone group were significantly increased compared with the CTP-HBcAg18-27-Tapasin + AG490 group (P < 0.01), although there was no statistical significance between the other groups. The expression levels of Jak2 and STAT4 were significantly higher in the CTP-HBcAg18-27-Tapasin alone group than the rest groups (P < 0.05), and the expression levels of Tyk2 and STAT1 were also dramatically increased in the CTP-HBcAg18-27-Tapasin alone group compared to other groups (P < 0.01).
CONCLUSION: CTP-HBcAg18-27-Tapasin fusion protein increases HBV-specific CTL response via the JAK/STAT signal pathway in C57BL/6 mice.
Collapse