Abstract:
:The aim of this study was to develop short- and long-term preservation protocols for European eel ovarian stem cells (OSCs) through hypothermic storage and cryopreservation of ovarian fragments that will assist in current conservation programs of this critically endangered species. Firstly, a freezing procedure was developed by testing different cryomedia and technical aspects of freezing. Utilization of 1.5 M of dimethyl sulfoxide (Me2SO), 0.1 M glucose and 1.5% BSA yielded optimal OSCs survival. Additionally, equilibration of 50-mg ovarian fragments for 30 min and plunging into lN2 at -80 °C displayed the highest OSC viability. Different cooling rates ranging from -1 to -40 °C/min did not significantly affect OSC viability when thawing in a 10 °C water bath. In addition, application of needle-immersed vitrification (NIV), combining ES3 (1.5 M PG and 1.5 M Me2SO) with VS3 (3 M PG and 3 M Me2SO) yielded the highest viability rates. Finally, hypothermic storage (4 °C) of ovarian fragments and ovarian cell suspensions displayed favorable viability of ~90% after 48 h of storage and ~65% after 72 h of storage. The development of OSC preservation methods presents an onset of further development of germline stem cell (GSC) manipulation techniques in this species. Cryopreservation of OSCs can enable a continuous supply of cells for either transplantation or in vitro cell culture thus enabling new and improved management and conservation strategies for this endangered species.
journal_name
Cryobiologyjournal_title
Cryobiologyauthors
Šćekić I,Marinović Z,Lujić J,Müller T,Kitanović N,Urbányi B,Horváth Ádoi
10.1016/j.cryobiol.2020.03.009subject
Has Abstractpub_date
2020-08-01 00:00:00pages
151-156eissn
0011-2240issn
1090-2392pii
S0011-2240(20)30071-7journal_volume
95pub_type
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