Discovery of human posterior head 20 (hPH20) and homo sapiens sperm acrosome associated 1 (hSPACA1) immunocontraceptive epitopes and their effects on fertility in male and female mice

文献类型： 外文期刊

第一作者： Chen, Xuemei

作者： Chen, Xuemei;Liu, Xiaodong;Ren, Xiuhua;Zang, Weidong;Li, Xuewu;Wang, Li

作者机构：

关键词： anti-sperm antibodies (ASAs);gene-specific peptide libraries;immunocontraceptive vaccine;immunoinfertile;male and female mice;phage display;sperm;synthetic peptide

期刊名称：REPRODUCTION FERTILITY AND DEVELOPMENT （ 影响因子：2.311； 五年影响因子：2.396 ）

ISSN： 1031-3613

年卷期： 2016 年 28 卷 4 期

页码：

收录情况： SCI

摘要： The key goals of immunocontraception research are to obtain full contraceptive effects using vaccines administered to both males and females. Current research concerning human anti-sperm contraceptive vaccines is focused on delineating infertility-related epitopes to avoid autoimmune disease. We constructed phage-display peptide libraries to select epitope peptides derived from human posterior head 20 (hPH20) and homo sapiens sperm acrosome associated 1 (hSPACA1) using sera collected from infertile women harbouring anti-sperm antibodies. Following five rounds of selection, positive colonies were reconfirmed for reactivity with the immunoinfertile sera. We biopanned and analysed the chemical properties of four epitope peptides, named P82, Sa6, Sa37 and Sa76. Synthetic peptides were made and coupled to either bovine serum albumin (BSA) or ovalbumin. We used the BSA-conjugated peptides to immunise BALB/c mice and examined the effects on fertility in female and male mice. The synthetic peptides generated a sperm-specific antibody response in female and male mice that caused a contraceptive state. The immunocontraceptive effect was reversible and, with the disappearance of peptide-specific antibodies, there was complete restoration of fertility. Vaccinations using P82, Sa6 and Sa76 peptides resulted in no apparent side effects. Thus, it is efficient and practical to identify epitope peptide candidates by phage display. These peptides may find clinical application in the specific diagnosis and treatment of male and female infertility and contraceptive vaccine development.

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