Vaxstrate: an anti-reproductive vaccine for cattle

Area of Science:

• Veterinary immunology
• Reproductive biology
• Animal health

Background:

• Pregnancy prevention in cattle is crucial for herd management and economic viability.
• Targeting reproductive hormones offers a potential mechanism for non-surgical sterilization.
• Gonadotrophin releasing hormone (GnRH) plays a central role in mammalian reproduction.

Purpose of the Study:

• To develop and evaluate a novel vaccine for preventing pregnancy in female cattle.
• To investigate the efficacy of targeting GnRH for reproductive control.
• To introduce a commercially viable product for cattle fertility management.

Main Methods:

• Development of an immunogenic conjugate using gonadotrophin releasing hormone (GnRH) and ovalbumin.
• Formulation of the conjugate in a novel double adjuvant system.
• Administration of the vaccine via a two-dose treatment regimen in field trials.

Main Results:

• The GnRH:ovalbumin conjugate vaccine demonstrated efficacy in preventing pregnancy in female cattle.
• Antibodies against GnRH successfully blocked its action on pituitary hormone secretion.
• Field trials confirmed the vaccine's effectiveness, leading to commercialization.

Conclusions:

• A novel GnRH-based vaccine, Vaxstrate, is effective for cattle pregnancy prevention.
• The vaccine offers a safe and commercially viable alternative for reproductive control in cattle.
• This development represents a significant advancement in animal health and livestock management.