{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T00:59:25Z","timestamp":1760057965903,"version":"build-2065373602"},"reference-count":43,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2025,3,3]],"date-time":"2025-03-03T00:00:00Z","timestamp":1740960000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Key R&amp;D project of Ningxia Hui Autonomous Region","award":["2019BCG01001","2023SF10"],"award-info":[{"award-number":["2019BCG01001","2023SF10"]}]},{"name":"Yinchuan Science and Technology Support Project","award":["2019BCG01001","2023SF10"],"award-info":[{"award-number":["2019BCG01001","2023SF10"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Vaccines"],"abstract":"<jats:p>Background:\u00a0Echinococcus granulosus represents a significant threat to animal husbandry and human health, but its consequences are often underestimated. Vaccination can prevent E. granulosus infection. We investigated the immune protective effect induced by the recombinant protein P29 of E.\u00a0granulosus (rEg.P29) peptide vaccine. Methods: The CD4+ T-, CD8+ T-, Treg-, and CD8+CD107a+ T-cell proportions in the spleen and peripheral blood of infected mice were analyzed using flow cytometry. Additionally, we measured the proportions of IFN-\u03b3 and IL-2 secreted by memory T cells, CD19+CD138\u2212B cells, CD19+CD138+ plasmablasts, CD19\u2212CD138+ plasma cells, and CD19+IgD\u2212IgG+ and CD19+IgD\u2212IgA+ memory B cells. Results: No significant differences were noted in CD4+ T-, CD8+ T-, and CD8+CD107a+ Treg-cell percentages among the experimental groups. However, IFN-\u03b3, IL-2, and TNF-\u03b1 levels and vaccine-specific antibody concentrations in the plasma were significantly elevated in the rEg.P29T+B + CpG + infection and rEg.P29 + CpG + infection groups compared to those in the PBS + infection and CpG + infection groups. Similarly, CD19\u2212CD138+ plasma cell and CD19+IgD\u2212IgG+ and CD19+IgD\u2212IgA+ memory B-cell populations, along with specific antibodies, were significantly higher in these groups. Especially, the average cyst burden in the rEg.P29T+B + CpG + infection and rEg.P29 + CpG + infection groups was significantly reduced compared to that in the PBS + infection and CpG + infection groups. Conclusions: Synthetic peptide vaccines targeting rEg.P29 can effectively inhibit cysts, offering a novel strategy for the development of vaccines against E.\u00a0granulosus. These findings provide a foundation for further research on the immunogenicity and protective efficacy of rEg.P29-based vaccines.<\/jats:p>","DOI":"10.3390\/vaccines13030266","type":"journal-article","created":{"date-parts":[[2025,3,3]],"date-time":"2025-03-03T07:37:17Z","timestamp":1740987437000},"page":"266","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Synthetic rEg.P29 Peptides Induce Protective Immune Responses Against Echinococcus granulosus in Mice"],"prefix":"10.3390","volume":"13","author":[{"given":"Yongxue","family":"Lv","sequence":"first","affiliation":[{"name":"School of Basic Medicine, Ningxia Medical University, Yinchuan 750004, China"},{"name":"Ningxia Key Laboratory of Prevention and Control of Common Infectious Diseases, Ningxia Hui Autonomous Region, Yinchuan 750004, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jing","family":"Tang","sequence":"additional","affiliation":[{"name":"School of Basic Medicine, Ningxia Medical University, Yinchuan 750004, China"},{"name":"Ningxia Key Laboratory of Prevention and Control of Common Infectious Diseases, Ningxia Hui Autonomous Region, Yinchuan 750004, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tao","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Hepatobiliary Surgery, General Hospital of Ningxia Medical University, Yinchuan 750004, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yinqi","family":"Zhao","sequence":"additional","affiliation":[{"name":"Ningxia Key Laboratory of Prevention and Control of Common Infectious Diseases, Ningxia Hui Autonomous Region, Yinchuan 750004, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Changyou","family":"Wu","sequence":"additional","affiliation":[{"name":"Institute of Immunology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 5102275, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wei","family":"Zhao","sequence":"additional","affiliation":[{"name":"School of Basic Medicine, Ningxia Medical University, Yinchuan 750004, China"},{"name":"Ningxia Key Laboratory of Prevention and Control of Common Infectious Diseases, Ningxia Hui Autonomous Region, Yinchuan 750004, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2025,3,3]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"106178","DOI":"10.1016\/j.actatropica.2021.106178","article-title":"Echinococcus granulosus sensu stricto and E. canadensis are distributed in livestock of highly endemic area in the Peruvian highlands","volume":"225","author":"Sanchez","year":"2022","journal-title":"Acta Trop."},{"key":"ref_2","unstructured":"Huzaifa, M., and Sharman, T. 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