Effects of active immunization with newly modified GnRH peptides on spermatogenesis and production performance of Holstein bulls

文献类型： 外文期刊

第一作者： Xu, Mengsi

作者： Xu, Mengsi;Liu, Fuyuan;Meng, Jimeng;Yang, Jinquan;Zhou, Ping;Gan, Shangquan;Xu, Chunsheng;Gao, Rui;Xu, Chunsheng;Gao, Rui;Xu, Chunsheng;Shen, Xiaoyun;Shen, Xiaoyun;Chen, Hongli

作者机构：

关键词： GnRH; immune castration; meat quality; testis; hapten

期刊名称：BIOLOGY OF REPRODUCTION （ 影响因子：4.285； 五年影响因子：4.307 ）

ISSN： 0006-3363

年卷期： 2018 年 99 卷 2 期

页码：

收录情况： SCI

摘要： Immunocastration via vaccination against gonadotropin-releasing hormone (GnRH) is an effective alternative to surgical castration in livestock. In this study, male mice were immunized with eight GnRH peptide derivatives. Two, which exhibited highly significant effects in mice, and one which exhibited the least significant effects were selected for active immunization of 13-month-old bulls. The effects of these GnRH vaccines on sexual development and meat quality in bulls were evaluated by examining testis length, serum hormone and GnRH antibody concentrations, observation of sexual behavior and testicular tissue sections, and evaluation of meat quality indexes. The results indicated that anti-GnRH titers increased rapidly (P < 0.05) and serum follicle stimulating hormone, luteinizing hormone, and testosterone concentrations decreased sharply after booster immunization (P < 0.05), while testis volumes were lower (P < 0.01), testicular growth was arrested and spermatogenesis inhibited in group C GnRH-treated versus control bull groups. Meat quality was not significantly different in immunocastrates relative to bulls in the control group. Our collective results provide a scientific basis to further clarify the mechanisms underlying GnRH-mediated regulation of livestock reproduction, and contribute to the development of an efficient, safe, and reversible immune castration vaccine. Summary Sentence Studying active immunization against GnRH has been a focus for future research. However, the immunogenicity of GnRH monomeric derivatives were produced undesirable results. In this paper, we successfully developed a highly efficient animal castration vaccine.

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