Volume 6, Issue 5 (7-2008)                   IJRM 2008, 6(5): 209-0 | Back to browse issues page

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Mahmoudi R, Amiri I, Pasbakhsh P, Ragardi Kashani I, Abbasi M, Aboulhasani F, et al . The effects of vitrification on spindle apparatus of in vitro matured germinal vesicle in mice. IJRM. 2008; 6 (5) :209-0
URL: http://journals.ssu.ac.ir/ijrmnew/article-1-126-en.html
1- Department of Anatomy, Faculty of Medicine, Yasouj University of Medical Sciences, Yasuj, Iran
2- Department of Anatomy, Faculty of Medicine, Hamedan University of Medical Sciences, Hamedan, Iran
3- Department of Anatomy, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
4- Department of Anatomy, Faculty of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
5- Department of Anatomy, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran , Sobhania@tums.ac.ir
Abstract:   (1000 Views)
Background: Routine oocytes cryopreservation remained an elusive technique in the wide ranges of available assisted reproductive technologies. The microtubules of oocytes are vulnerable to cryoprotectants and thermal change during cryopreservation.
Objective: The effects of a vitrification protocol were investigated on the spindle and chromosome configurations of mice oocytes cryopreserved at the germinal vesicle stage.
Materials and Methods: Germinal vesicle with cumulus cells were transferred to vitrification solution which was composed of 30% (v/v) ethylene glycol, 18% Ficoll-70 and 0.3 M Sucrose either by single step or in step-wise way. Following vitrification and in vitro maturation (MII), the matured oocytes were immonostained for meiotic spindles and chromosomes, before visualization using fluorescent microscopy.
Results: A statistically significant increase was observed in the survival and maturation rate in step-wise vitrification (88.96% and 71.23% respectively) compared to single step vitrification (70.6% and 62.42% respectively) (p<0.05). Normal spindle morphology after vitrification-thawing in step-wise vitrification group (77.26%) was higher than single step vitrification group (64.24%) but lower than control group (94.75%) (p<0.05).
Conclusion: The results suggest that vitrification with step-wise procedure on mice germinal vesicle oocytes has positive effects on survival and maturation rate and normal spindle configuration compare with single step vitrification procedure.
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Type of Study: Original Article |

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