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ENHANCEMENT OF THE PRO-FERTILITY ACTION OF A MOLECULE INVOLVED IN SPERM-EGG BINDING
ENHANCEMENT OF THE PRO-FERTILITY ACTION OF A MOLECULE INVOLVED IN SPERM-EGG BINDING
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机译:参与精卵结合的分子的促生育作用的增强
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摘要
A synthetic peptide with enhanced pro-fertility action was produced by inclusion of additional amino acids at the carboxyl end of a previously disclosed synthetic peptide. Improvement in bioactivity over the previously disclosed peptide was demonstrated. A direct comparison of an earlier known synthetic peptide and an extended peptide involved brief exposure of sperm in vitro to one or the other peptide at several concentrations. When sperm then were evaluated in vitro using an egg-membrane substrate, an increased percentage of sperm bound for cells exposed to the new extended peptide. Similarly, when fertility of sperm after artificial insemination was the criterion, a greater percentage of eggs was fertilized by sperm exposed to the new extended peptide. In one preferred embodiment, this enhanced pro-fertility action was achieved with a peptide having a 68 amino acid sequence (SEQ ID NO 1:): Cys-Gln-Ser-Leu-Gln-Glu-Tyr-Leu-Ala-Glu-Gln-Asn-Gln-Arg-Gln-Leu-Glu-Ser-Asn-Lys-Ile-Pro-Glu-Val-Asp-Leu-Ala-Agr-Val-Val-Ala-Pro-Phe-Met-Ser-Asn-Ile-Pro-Leu-Leu-Leu-Tyr-Pro-Gln-Asp-Arg-Pro-Arg-Ser-Gln-Pro-Gln-Pro-Lys-Ala-Asn-Glu-Asp-Val-Cys-Val-Asn-His-His-His-His-His-His.
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机译:通过在先前公开的合成肽的羧基末端包含额外的氨基酸来生产具有增强的育性作用的合成肽。证明了生物活性比先前公开的肽有所提高。对较早已知的合成肽和扩展肽的直接比较涉及精子在体外短暂暴露于几种浓度的一种或另一种肽。当使用卵膜基质体外评估精子时,与暴露于新的扩展肽的细胞结合的精子百分比增加。同样,当以人工授精后精子的受精为标准时,暴露于新的延伸肽的精子可以使更多的卵受精。在一个优选的实施方案中,这种增强的促生育作用是通过具有68个氨基酸序列(SEQ ID NO:1)的肽实现的:Cys-Gln-Ser-Leu-Gln-Glu-Tyr-Leu-Ala-Glu- Gln-Asn-Gln-Arg-Gln-Leu-Glu-Ser-Asn-Lys-Ile-Pro-Glu-Val-Asp-Leu-Ala-Agr-Val-Val-Ala-Pro-Phe-Met-Ser- Asn-Ile-Pro-Leu-Leu-Leu-Tyr-Pro-Gln-Asp-Arg-Pro-Arg-Ser-Gln-Pro-Gln-Pro-Lys-Ala-Asn-Glu-Asp-Val-Cys- Val-Asn-His-His-His-His-His-His。
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