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Chang, Ai-Mei; Chen, Chen-Chih; Lee, Jai-Wei; Hou, Ding-Liang; Huang, Hsiao-Hui; Ke, Guan-Ming
Vaccine, 03/2023, Letnik: 41, Številka: 13Journal Article
•A recombinant GnRH-1 fusion protein with the adjuvant MONTANIDE ISA 206 VG is described for GnRH-targeted immunocastration.•Vaccination sustains long-lasting specific anti-GnRH antibodies.•Vaccination decreased levels of sexual hormones and cessation of the estrous cycle.•Vaccination induced testicular atrophy, and reduced sperm quality, concentration, morphology, viability.•This vaccine can be utilized in both sexes and different ages. Immunocastration is an effective alternative to surgical castration for controlling the population of animals. As gonadotropin-releasing hormone (GnRH) regulates the reproductive endocrine system in mammals, it is a target antigen for vaccine formulation. Through this study, we evaluated the effectiveness of a recombinant subunit GnRH-1 vaccine for the immunocastration of the reproductive function of 16 mixed-breed dogs (Canis familiaris) provided voluntarily by different households. All the dogs were deemed clinically healthy prior to and during the experiment. A specific anti-GnRH immune response was detected at Week 4, which was maintained for at least 24 weeks after vaccination. Moreover, decreased levels of sexual hormones (testosterone as well as progesterone and estrogen, respectively) were observed in both male and female dogs. Estrous suppression was apparent in female dogs, and testicular atrophy and poor semen quality (concentration, abnormality, and viability) were observed in male dogs. In conclusion, the recombinant subunit GnRH-1 vaccine could successfully suppress fertility and delay the estrous cycle in canines. These results support the efficacy of the recombinant subunit GnRH-1 vaccine; thus, it is a suitable candidate for fertility control in dogs.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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