Reproduction, Fertility and Development | VOL. 33

20 Development and Oct4/Cdx2 gene expression of Puma concolor, Leopardus geoffroyi, and Panthera onca hybrid embryos produced using domestic cat oocytes

Publication Date Jan 1, 2021


The development of assisted reproductive technologies (ARTs) in Felidae species has been proposed to guarantee the genetic viability of species that are on the verge of extinction. Investigation of sperm cryopreservation and IVF have been studied in several Felidae species, but the lack of viable homologous oocytes makes assessment of sperm fertilization capacity after cryopreservation difficult. We propose to evaluate the capability of Puma concolor (Pc), Leopardus geoffroyi (Lg), and Panthera onca (Po) cryopreserved sperm to induce domestic cat oocyte fertilization and subsequent pre-implantation embryo development. Additionally, we evaluated blastocyst quality by analysing the gene expression patterns of pluripotency (Oct4) and differentiation (Cdx2) related markers using reverse transcription-quantitative polymerase chain reaction (RT-qPCR). After ovariectomy, domestic cat (Felis catus, Fc) cumulus–oocyte complexes were matured invitro at 38.5°C in a humidified atmosphere of 6.5% CO2 and 21% O2 for 22h. Cryopreserved sperm from Pc, Lg, and Po were used for heterologous IVF. The sperm was frozen using Tes-Tris–based diluent (TEST), and survival, sperm motility, and acrosome integrity were evaluated. The quality post-thaw was satisfactory. The survival was high, sperm motility (65%) did not decrease during incubation post-thaw, and sperm with intact acrosome was 62% for all species. Briefly, straws were thawed by exposing them to air for 10s and then immersing in a 37°C water bath for 30s. The contents of the straws were ...


Leopardus Geoffroyi Felidae Species Development Of Assisted Reproductive Technologies Domestic Cat Oocyte Reverse Transcription-quantitative Polymerase Chain Reaction Analysis Reverse Transcription-quantitative Polymerase Chain Reaction Cumulus Oocyte Complexes Sperm Motility Panthera Onca Intact Acrosome

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No potential conflict of interest was reported by the authors. The conception and design of the study, acquisition of data, analysis and interpretatio...

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