Isachenko, Vladimir, Todorov, Plamen ORCID: 0000-0003-3731-6116, Isachenko, Evgenia, Rahimi, Gohar, Tchorbanov, Andrey, Mihaylova, Nikolina, Manoylov, Iliyan, Mallmann, Peter and Merzenich, Markus (2015). Long-Time Cooling before Cryopreservation Decreased Translocation of Phosphatidylserine (Ptd-L-Ser) in Human Ovarian Tissue. PLoS One, 10 (6). SAN FRANCISCO: PUBLIC LIBRARY SCIENCE. ISSN 1932-6203

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Abstract

Objectives To translocation (externalization) of phosphatidylserine lead at least the five negative effects observed during cells cryopreservation: hypoxia, increasing of intracellular Ca2+, osmotic disruption of cellular membranes, generation of reactive oxygen species (ROS) and lipid peroxidation. The aim of this study was to test the intensiveness of the phosphatidylserine translocation immediately after thawing and after 45 d xenografting of human ovarian tissue, which was either frozen just after operative removal from patient or cooled before cryopreservation to 5 degrees C for 24 h and then frozen. Materials and Methods Ovarian fragments from twelve patients were divided into small pieces in form of cortex with medulla, and randomly divided into the following four groups. Pieces of Group 1 (n=30) were frozen immediately after operation, thawed and just after thawing their quality was analyzed. Group 2 pieces (n=30) after operation were cooled to 5 degrees C for 24 h, then frozen after 24 h pre-cooling to 5 degrees C, thawed and just after thawing their quality was analyzed. Group 3 pieces (n=30) were frozen immediately after operation without pre-cooling, thawed, transplanted to SCID mice and then, after 45 d of culture their quality was analyzed. Group 4 pieces (n=30) were frozen after 24 h pre-cooling to 5 degrees C, thawed, transplanted to SCID mice and then, after 45 d their quality was analyzed. The effectiveness of the pre-freezing cooling of tissuewas evaluated by the development of follicles (histology) and by intensiveness of translocation of phosphatidylserine (FACS with FITC-Annexin V and Propidium Iodide). Results For groups 1, 2, 3 and 4 the mean densities of follicles per 1 mm(3) was 19.0, 20.2, 12.9, and 12.2, respectively (P1-2, (3-4) >0.1). For these groups, 99%, 98%, 88% and 90% preantral follicles, respectively were morphologically normal (P1-2, (3-4) >0.1). The FACS analysis showed significantly decreased intensiveness of translocation of phosphatidylserine after pre-cooling of frozen tissue (46.3% and 33.6% in Groups 2 and 4, respectively), in contrast with tissue frozen without pre-cooling (77.1% and 60.2 % in Groups 1 and 3, respectively, P-1, (3-2), (4) <0.05). Conclusions Long time (24 h) cooling of ovarian tissue to 5 degrees C before cryopreservation decreased translocation of phosphatidylserine that evidences about increases the viability of the cells in the tissue after thawing.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Isachenko, VladimirUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Todorov, PlamenUNSPECIFIEDorcid.org/0000-0003-3731-6116UNSPECIFIED
Isachenko, EvgeniaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rahimi, GoharUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tchorbanov, AndreyUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mihaylova, NikolinaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Manoylov, IliyanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mallmann, PeterUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Merzenich, MarkusUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-401054
DOI: 10.1371/journal.pone.0129108
Journal or Publication Title: PLoS One
Volume: 10
Number: 6
Date: 2015
Publisher: PUBLIC LIBRARY SCIENCE
Place of Publication: SAN FRANCISCO
ISSN: 1932-6203
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
APOPTOTIC CELLS; HUMAN SPERMATOZOA; VITRIFICATION; FERTILITY; EXTERNALIZATION; TRANSPLANTATION; DEATH; AUTOTRANSPLANTATION; RECOMMENDATIONS; ENGULFMENTMultiple languages
Multidisciplinary SciencesMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/40105

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