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The effect of chilling on membrane lipid phase transition in human oocytes and zygotes
Year:
2005
Source of publication :
Human Reproduction
Authors :
Shalom, Yavin
;
.
Volume :
20
Co-Authors:
Ghetler, Y., Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel, IVF Unit, Obstetrics and Gynaecology Department, Meir Hospital, Kfar Saba 44281, Israel
Yavin, S., Institute of Animal Science, Volcani Centre, POB 6, Bet Dagan 50250, Israel
Shalgi, R., Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
Arav, A., Institute of Animal Science, Volcani Centre, POB 6, Bet Dagan 50250, Israel
Facilitators :
From page:
3385
To page:
3389
(
Total pages:
5
)
Abstract:
Background: Chilling injury occurs when the cell membrane undergoes a transition from the liquid state to the gel state. Human oocytes and single-cell zygotes are of similar shape and size but the post-thawing survival rate of oocytes is poorer. We set out to investigate the possible difference in membrane lipid phase transition (LPT) temperature between the two cell types. Methods: The LPT temperature was measured with a Fourier Transform Infrared analyser, which detects the change in the vibration frequency of the CH2 bond stretches of the membrane lipid molecules during temperature change. The LPT temperatures of unfertilized human oocytes, in vitro-matured oocytes, and immature germinal vesicle (GV) stage oocytes were compared with that of abnormally fertilized human zygotes. Results: The LPT temperatures of zygotes and of mature and immature GV oocytes differ significantly from each other (10.0 ± 1.2, 16.9 ± 0.9 and 24.4 ± 1.6°C respectively; P < 0.05). Conclusions: Zygotes show a higher resistance to chilling injury compared to oocytes at different developmental stages; this might explain the relatively poor survival rates of cryopreserved human oocytes and indicates the necessity to adjust the cryopreservation protocols in order to minimize cryoinjury. © The Author 2005. Published by Oxford University Press on behalf of the European Society of Human Reproduction and Embryology. All rights reserved.
Note:
Related Files :
cell membrane
chilling injury
Fertilization
induced hypothermia
Lipids
Phase Transition
temperature
Show More
Related Content
More details
DOI :
10.1093/humrep/dei236
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
31620
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:04
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Scientific Publication
The effect of chilling on membrane lipid phase transition in human oocytes and zygotes
20
Ghetler, Y., Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel, IVF Unit, Obstetrics and Gynaecology Department, Meir Hospital, Kfar Saba 44281, Israel
Yavin, S., Institute of Animal Science, Volcani Centre, POB 6, Bet Dagan 50250, Israel
Shalgi, R., Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
Arav, A., Institute of Animal Science, Volcani Centre, POB 6, Bet Dagan 50250, Israel
The effect of chilling on membrane lipid phase transition in human oocytes and zygotes
Background: Chilling injury occurs when the cell membrane undergoes a transition from the liquid state to the gel state. Human oocytes and single-cell zygotes are of similar shape and size but the post-thawing survival rate of oocytes is poorer. We set out to investigate the possible difference in membrane lipid phase transition (LPT) temperature between the two cell types. Methods: The LPT temperature was measured with a Fourier Transform Infrared analyser, which detects the change in the vibration frequency of the CH2 bond stretches of the membrane lipid molecules during temperature change. The LPT temperatures of unfertilized human oocytes, in vitro-matured oocytes, and immature germinal vesicle (GV) stage oocytes were compared with that of abnormally fertilized human zygotes. Results: The LPT temperatures of zygotes and of mature and immature GV oocytes differ significantly from each other (10.0 ± 1.2, 16.9 ± 0.9 and 24.4 ± 1.6°C respectively; P < 0.05). Conclusions: Zygotes show a higher resistance to chilling injury compared to oocytes at different developmental stages; this might explain the relatively poor survival rates of cryopreserved human oocytes and indicates the necessity to adjust the cryopreservation protocols in order to minimize cryoinjury. © The Author 2005. Published by Oxford University Press on behalf of the European Society of Human Reproduction and Embryology. All rights reserved.
Scientific Publication
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