title: Effect of deslorelin acetate treatment in oocyte recovery and in vitro embryo production in domestic cats.
abstract: Objectives The present study investigated the effect of contraceptive treatment with deslorelin acetate on in vitro embryo production and oocyte recovery in domestic queens. Methods Twenty-one mature domestic cats were used. Eleven queens (treated group) and one tom were kept in an experimental cattery, and 10 queens were privately owned (control group). When in interestrus or diestrus (day 0) a deslorelin acetate implant (Suprelorin, 4.7 mg/animal) was inserted into the subcutaneous tissue of the interscapular region in all queens in the treated group. After 6 months of treatment, all animals were ovariohysterectomized, and the ovaries were used for in vitro embryo production. Percentage of cleavage was determined 18 h after oocyte insemination and blastocyst formation was assessed on the eighth day of culture. The rate of cumulus-oocyte complexes (COCs) recovery was analyzed by an unpaired t-test. The cleavage and blastocyst rates were expressed as percentages and analyzed by Fisher's exact test. All analyses were performed using GraphPad Prism v5.0, with P <0.05 set as the level of significance. Results In the treated group, we recovered 8.3 ± 1.15 grade I COCs per queen; the cleavage rate was 60% and the blastocyst rate was 36%. In the control group, we recovered 18.4 ± 3.21 grade I COCs per queen; the cleavage rate was 55.97% and the blastocyst rate was 34%. Forty percent of treated females did not produce any blastocysts. In the treated group, we observed a significant decrease in COC recovery. Although there was no significant difference in cleavage and blastocyst rates between groups, 40% of treated females did not produce any blastocysts. Conclusions Recovery of grade I COCs is negatively affected by deslorelin treatment in domestic cats. Regarding embryo production, new studies are still necessary to evaluate the success of this technique owing to the individual effect caused by deslorelin acetate.
authors.affiliation: 1 Department of Animal Reproduction and Veterinary Radiology, Faculty of Veterinary Medicine and Animal Science, Faculty of Veterinary Medicine and Animal Science/São Paulo State University, Botucatu, Brazil.
authors.forename: Camila Louise
authors.initials: CL
authors.lastname: Ackermann
authors.affiliation: 1 Department of Animal Reproduction and Veterinary Radiology, Faculty of Veterinary Medicine and Animal Science, Faculty of Veterinary Medicine and Animal Science/São Paulo State University, Botucatu, Brazil.
authors.forename: Eduardo
authors.initials: E
authors.lastname: Trevisol
authors.affiliation: 1 Department of Animal Reproduction and Veterinary Radiology, Faculty of Veterinary Medicine and Animal Science, Faculty of Veterinary Medicine and Animal Science/São Paulo State University, Botucatu, Brazil.
authors.forename: Leticia Ferrari
authors.initials: LF
authors.lastname: Crocomo
authors.affiliation: 1 Department of Animal Reproduction and Veterinary Radiology, Faculty of Veterinary Medicine and Animal Science, Faculty of Veterinary Medicine and Animal Science/São Paulo State University, Botucatu, Brazil.
authors.forename: Tatiana da Silva
authors.initials: TDS
authors.lastname: Rascado
authors.affiliation: 1 Department of Animal Reproduction and Veterinary Radiology, Faculty of Veterinary Medicine and Animal Science, Faculty of Veterinary Medicine and Animal Science/São Paulo State University, Botucatu, Brazil.
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Volpato
authors.affiliation: 1 Department of Animal Reproduction and Veterinary Radiology, Faculty of Veterinary Medicine and Animal Science, Faculty of Veterinary Medicine and Animal Science/São Paulo State University, Botucatu, Brazil.
authors.forename: Carlos Renato de Freitas
authors.initials: CRF
authors.lastname: Guaitolini
authors.affiliation: 2 Department of Veterinary Surgery and Anesthesiology, Faculty of Veterinary Medicine and Animal Science, Faculty of Veterinary Medicine and Animal Science/São Paulo State University, Botucatu, Brazil.
authors.forename: Carlize
authors.initials: C
authors.lastname: Lopes
authors.affiliation: 1 Department of Animal Reproduction and Veterinary Radiology, Faculty of Veterinary Medicine and Animal Science, Faculty of Veterinary Medicine and Animal Science/São Paulo State University, Botucatu, Brazil.
authors.forename: Talita de Almeida
authors.initials: TA
authors.lastname: Costa
authors.affiliation: 1 Department of Animal Reproduction and Veterinary Radiology, Faculty of Veterinary Medicine and Animal Science, Faculty of Veterinary Medicine and Animal Science/São Paulo State University, Botucatu, Brazil.
authors.forename: Maria Denise
authors.initials: MD
authors.lastname: Lopes
mesh_terms: D000818:Animals; D001755:Blastocyst / Q000166:cytology / Q000502:physiology; D002415:Cats; D005260:Female; D005307:Fertilization in Vitro / Q000379:methods / Q000662:veterinary*; D054315:Oocyte Retrieval / Q000379:methods / Q000662:veterinary*; D009865:Oocytes / Q000166:cytology / Q000187:drug effects*; D017329:Triptorelin Pamoate / Q000031:analogs & derivatives* / Q000494:pharmacology
chemical_list: D017329:Triptorelin Pamoate; C066438:deslorelin