Impacts of different synthetic polymers on vitrification of ovarian tissue

Mohammad Hamed Shahsavari, Kele Amaral Alves, Benner Geraldo Alves, Laritza Ferreira de Lima, Diego Alberto Montano Vizcarra, Deysi Juana Dipaz Berrocal, Luciana Mascena Silva, Yago Pinto da Silva, Mary B. Zelinski, José Ricardo de Figueiredo, Gholamali Moghaddam, Ana Paula Ribeiro Rodrigues

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Type and concentration of cryoprotective agents (CPAs) are important factors which influence the likelihood of a successful ovarian tissue vitrification outcome. In an attempt to address this factor, the present study was conducted to evaluate the impacts of different synthetic polymers (Supercool X-1000, Supercool Z-1000 and PVP K-12) on vitrification of bovine ovarian tissue. From each ovarian pair, fragments were recovered and immediately fixed for analysis (fresh control) or submitted to vitrification, either or not followed by in vitro culture for one or five days. Vitrification was performed using the ovarian tissue cryosystem (OTC) system. The ovarian tissues were intended for histological and viability analysis [Reactive oxygen species (ROS) production and degenerate cells assay (Ethidium homodimer-1)], as well as immunolocalization of AQP3 and AQP9 were measured. The results showed that during almost all the periods after warming, in treatment groups which contain polymer (X-1000, Z-1000 and PVP), the percentage of morphologically normal follicles was the highest in the X-1000 samples. Furthermore, post-thawed X-1000 group revealed stronger labeling for AQP9 in primordial and transitional follicles, when compared with others. However, morphology after cryopreservation did not correlate with follicle viability and function where the levels of degeneration and tissue damage of PVP K-12 group were lower in comparison with X-1000 group and only in PVP K-12 group, ROS level was similar to that of the fresh control group. We believe that in addition to permeating CPAs, the addition of one (Supercool X-1000) or maybe a combination (Supercool X-1000 and PVP K-12) of non-permeating polymers could be useful to improve the outcome for vitrified bovine ovarian tissue.

    Original languageEnglish (US)
    Pages (from-to)66-72
    Number of pages7
    JournalCryobiology
    Volume94
    DOIs
    StatePublished - Jun 2020

    Keywords

    • Cryoprotective agents
    • In vitro culture
    • Ovarian tissue
    • Synthetic polymers
    • Vitrification

    ASJC Scopus subject areas

    • Biochemistry, Genetics and Molecular Biology(all)
    • Agricultural and Biological Sciences(all)

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