期刊
AMERICAN JOURNAL OF REPRODUCTIVE IMMUNOLOGY
卷 75, 期 4, 页码 474-485出版社
WILEY
DOI: 10.1111/aji.12485
关键词
IZUMO; linear B-cell epitope; peptide vaccine; sperm antigen; sperm-egg fusion
资金
- National Natural Science Foundation of China [81070526, 81270732]
- Shanghai Municipal Commission of Population and Planned Parenthood [2013JG09]
ProblemThe development of a new and suitable contraceptive methods, as well as in-depth and systematic research into underlying contraceptive mechanisms, is crucial. IZUMO1 plays an important role in the fusion of the sperm and ovum during fertilization. Izumo(-/-) mice are infertile. Therefore, IZUMO1 may be a potential target for the development of a contraceptive vaccine. Method of studyLinear B-cell epitopes (BCE) were identified in IZUMO using biosynthetic peptides and used to immunize female mice. ResultsFive IZUMO BCE were identified: DLVLDCL177-183, YSFYRV196-201 (named BCE-2), YLT217-219, SMVGPED221-227, and DAGNY228-232. Active immunization with the BCE-2 vaccine sharply decreased the fertility rate in female mice in a safe and reversible manner. In vitro fertilization showed that the BCE-2 vaccine interferes with and blocks the fusion of the sperm and the ovum. ConclusionsB-cell epitopes-2 may be a new candidate for the development of contraceptive vaccine due to its effectiveness, safety, and reversibility.
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