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Showing 2 results for Rezazadeh Valojerdi

Kamran Haidari, Mojdeh Salehnia, Mojtaba Rezazadeh Valojerdi, Shahram Pourbyranvand,
Volume 6, Issue 5 (7-2008)
Abstract

Background: The ultrastructural analysis of cultured follicles could direct us to understand subcellular changes during in vitro culture.
Objective: This study was done to verify the ultrastructural characteristics of in vitro cultured mouse isolated preantral follicles in co-culture system in the presence and absence of leukemia inhibitory factor (LIF)
Materials and Methods: Mechanically isolated preantral follicles were divided into four groups: control without LIF, control with LIF, co-cultured group with LIF, co-cultured group without LIF. In co-culture groups the follicles were cultured with cumulus cells. After 4 days the follicles were processed and sectioned for transmission electron microscopic examination.
Results: The oocytes of cultured preantral follicles in all studied groups demonstrated a homogeneous cytoplasm and they had the round or ovoid shaped mitochondria with light matrix and cristae. Their endoplasmic reticulum cisternae were in association with mitochondria and Golgi complex. The cortical granules and the aggregation of mitochondria around the germinal vesicle were prominent in both co-cultured groups. The organelle distribution in granulosa cells was normal in all groups of study and no sign of cell death was observed. In both co-cultured systems the granulosa cells contained mitochondria with tubular cristae, a well developed smooth endoplasmic reticulum and several large lipid droplets, characteristics of steroid synthesis cells. Conclusion: The oocyte and granulosa cells in co-cultured system showed more remarkable maturation features than that of control.
Farhad Golshan Iranpour, Mojtaba Rezazadeh Valojerdi,
Volume 11, Issue 3 (5-2013)
Abstract

Background: When male animals die, spermatozoa within the body of animal will be degenerated. Because of unique chromatin structure of sperm, maybe this degeneration is different from other cells. However there is not any research which considered directly the integrity of sperm DNA by keeping the cadaver in refrigerator.
Objective: The aim of this study was to assess viability, total motility and DNA integrity of sperm cells after death.
Materials and Methods: In this experimental study, 24 male Swiss white mice were killed by cervical dislocation and then kept in refrigerator (4-6oC) for up to 12 days. On the 0 (immediately after death as control group), 1st, 2nd, 3rd, 5th, 7th, 10th and the 12th days after death cauda epididymides were removed and squeezed in Ham’s F10 medium. The proportion of viable, motile and double stranded DNA spermatozoa was examined. Viability and DNA integrity of sperm cells were examined consecutively by eosin nigrosin and acridine orange stainings.
Results: The data obtained from this study showed that viability and total motility of sperm cells were significantly decreased during 12 days after death (p<0.001). In contrast with viability and motility, DNA integrity was without significant changes (even 12 days after death).
Conclusion: This study suggests that integrity of sperm DNA would not change even after 12 days after death if the cadaver kept in refrigerator.

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