首页> 外文期刊>Clinical immunology: The official journal of the Clinical Immunology Society >Inhibition of in vitro gamete adhesion and in vivo fertility in mice by immunization with a synthetic peptide.
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Inhibition of in vitro gamete adhesion and in vivo fertility in mice by immunization with a synthetic peptide.

机译:通过合成肽免疫抑制小鼠体内配子粘附和体内受精。

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PROBLEM: To evaluate the contraceptive ability of a synthetic peptide in in vitro and in vivo fertility in the mouse. METHOD OF STUDY: A synthetic peptide segment: GELRERAPGQGTNG (SP) was used to immunize female B6CF1 (C57BL/6 x BALB/c) mice. A peptide with an amino acid sequence QQPLSIQQHERG (p2control) was used as control. Anti-SP and anti-p2control antisera were used to evaluate sperm function inhibition in vitro. Fertility of immunized mice was determined by microscopic evaluation of the number and state of preimplantation embryos (8-16 cell stage). RESULTS: In the mouse, anti-SP antisera recognized surface antigens in the acrosome region of mature and capacitated sperm. Anti-SP antisera inhibited in vitro sperm binding to zona pellucida. In vivo, immune response against SP in Freund's adjuvant resulted in a significant increase (P < 0.01) in the number of dead embryos and eggs (a mean of 66%, in contrast with < 25% in control mice). Fertility inhibition in vivo and in vitro was not observed when the p2control peptide was used in the immunizations. CONCLUSIONS: These results would suggest that the SP sequence is involved in gamete adhesion, and an antifertility vaccine against the SP peptide segment could be feasible.
机译:问题:评估合成肽在小鼠体内和体外的生育能力。研究方法:合成肽片段:GELRERAPGQGTNG(SP)用于免疫雌性B6CF1(C57BL / 6 x BALB / c)小鼠。具有氨基酸序列QQPLSIQQHERG的肽(p2control)用作对照。使用抗SP和抗p2对照抗血清评估体外对精子功能的抑制作用。通过显微镜评估植入前胚胎的数量和状态(8-16个细胞阶段)来确定免疫小鼠的生育能力。结果:在小鼠中,抗SP抗血清识别成熟和获能的精子顶体区域的表面抗原。抗SP抗血清抑制体外精子与透明带的结合。在体内,弗氏佐剂中对SP的免疫反应导致死亡胚胎和卵的数量显着增加(P <0.01)(平均66%,而对照小鼠中则为<25%)。当将p2对照肽用于免疫中时,未观察到体内和体外的生育力抑制。结论:这些结果表明SP序列参与配子粘附,并且针对SP肽段的抗生育疫苗是可行的。

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