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Fernandez-Gonzalez L, Kozhevnikova V, Brusentsev E, et al. IGF-I Medium Supplementation Improves Singly Cultured Cat Oocyte Maturation and Embryo Development In Vitro. Animals (Basel). 2021;11(7)doi: 10.3390/ani11071909.
Fernandez-Gonzalez, L., Kozhevnikova, V., Brusentsev, E., Jänsch, S., Amstislavsky, S., & Jewgenow, K. (2021). IGF-I Medium Supplementation Improves Singly Cultured Cat Oocyte Maturation and Embryo Development In Vitro. Animals : an open access journal from MDPI, 11(7), . https://doi.org/10.3390/ani11071909
Fernandez-Gonzalez, Lorena, et al. "IGF-I Medium Supplementation Improves Singly Cultured Cat Oocyte Maturation and Embryo Development In Vitro." Animals : an open access journal from MDPI vol. 11,7 (2021). doi: https://doi.org/10.3390/ani11071909
Fernandez-Gonzalez L, Kozhevnikova V, Brusentsev E, Jänsch S, Amstislavsky S, Jewgenow K. IGF-I Medium Supplementation Improves Singly Cultured Cat Oocyte Maturation and Embryo Development In Vitro. Animals (Basel). 2021 Jun 27;11(7). doi: 10.3390/ani11071909. PMID: 34198979; PMCID: PMC8300187.
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Animals (Basel). 2021 Jun 27;11(7). doi: 10.3390/ani11071909.

IGF-I Medium Supplementation Improves Singly Cultured Cat Oocyte Maturation and Embryo Development In Vitro.

Animals : an open access journal from MDPI

Lorena Fernandez-Gonzalez, Valeria Kozhevnikova, Eugeny Brusentsev, Stefanie Jänsch, Sergei Amstislavsky, Katarina Jewgenow

Affiliations

  1. Department of Reproduction Biology, Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Straße 17, 10315 Berlin, Germany.
  2. Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Prosp. Lavrent'eva 10, 630090 Novosibirsk, Russia.

PMID: 34198979 PMCID: PMC8300187 DOI: 10.3390/ani11071909

Abstract

Embryo production is a routine procedure in several species. However, in felids, the effectiveness of this approach is far behind that in the majority of laboratory species. The development of a suitable environment starts with the proper composition of culture media. Therefore, for the improvement of assisted reproduction techniques and their outcome in cats, this is an urgent task. As the addition of insulin-like growth factors (IGF-I, IGF-II) or granulocyte-macrophage colony-stimulating factor (GM-CSF) was beneficial in other mammalian species, this study aims to check whether these components, combined with other factors (such as type of fertilisation or type of culture) can provide a benefit in the felid culture system in current use. Thus, these supplements, in different concentrations and combinations, were merged with the use of two fertilisation techniques and randomly assigned to single or group culturing. The results showed that the addition of IGF-I and/or GM-CSF produced an increase in morula and blastocyst rate in a single culture system. In particular, the supplementation with 20 ng/mL of IGF-I incremented the maturation rate by 10% and significantly increased the morula and blastocyst rates in single culturing. This result is especially remarkable for wild felids, where only a few oocytes and/or embryos are available.

Keywords: GM-CSF; ICSI; IGF-I; IGF-II; IVF; cat embryo; cat oocyte; embryo culture; felids; maturation

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