RESUMO
Background: Hypoxia causes detrimental effects on the structure and function of tissues through increased production of reactive oxygen species that are generated during the re-oxygenation phase of intermittent and continuous hypobaric hypoxia. This study was carried out to evaluate the effects of flaxseed [Fx] in reducing the incidence of hypoxia in rat testes
Materials and Methods: In this experimental study, 24 adult Wistar rats were randomly divided into four groups: i. Control group [Co] that received normal levels of oxygen and food, ii. Sham group [Sh] that were placed in hypoxia chamber but received normal oxygen and food, iii. Hypoxia induction group [Hx] that were placed in hypoxia chamber and treated with normal food, iv. Hypoxia induction group [Hx+Fx] that were placed in hypoxia chamber and treated with 10% flaxseed food. Both the Hx and Hx+Fx groups were kept in a hypoxic chamber for 30 days; during this period rats were exposed to reduced pressure [oxygen 8% and nitrogen 92%] for 4 hours/day. Then, all animal were sacrificed and their testes were removed. Malondialdehyde [MDA] and total antioxidant capacity [TAC] levels were evaluated in the testis tissue. Tubular damages were examined using histological studies. Blood samples and sperm were collected to assess IL-18 level and measure sperms parameters, respectively. All data were analyzed using SPPSS-22 software. One way-ANOVA or Kruskal-Wallis tests were performed for statistical analysis
Results: A significant difference was recorded in the testicular mass/body weight ratio in Hx and Hx+Fx groups in comparison to the control [P=0.003 and 0.027, respectively] and Sh [P=0.001 and 0.009, respectively] groups. The sperm count and motility in Hx+Fx group were significantly different from those of the Hx group [P=0.0001 and 0.028, respectively]. Also sperm viability [P=0.0001] and abnormality [P=0.0001] in Hx+Fx group were significantly different from Hx group
Conclusion: This study therefore suggests that the oral administration of flaxseed can be useful for prevention from the detrimental effects of hypoxia on rat testes structure and sperm parameters
RESUMO
Background: Family of colony-stimulating factors [CSF] have an essential role on early cross talk between embryo and uterine endometrium
Objective: The aim of this study was to evaluate the effects of the single dose of Granulocyte-CSF [G-CSF] injection on clinical outcome of assisted reproductive technology cycle in patients with repeated implantation failures
Materials and Methods: This randomized control trial study was performed on 52 infertile women who referred to the clinic with the history of more than three previous In vitro fertilization/Intracytoplasmic sperm injection-embryo transfer failures. All patients were stimulated with standard long protocol. All embryos were transferred on day five in blastocyst stage in both groups. The treated group received 300 Mug [0.5 ml] recombinant human G-CSF subcutaneously which was injected 30 min before blastocyst embryo transfer
Results: There was not statistically significant differences in abortion rate in G-CSF and control group [p=0.09]. G-CSF treated group showed higher clinical pregnancy rate in comparison with control group [56.2% vs. 40.0%] but it was not statistically significant [p=0.09]. Although live birth rate in G-CSF group was higher than control group [53.1% vs. 35.0%] but there wasn't statistically significant difference in the overall live birth rate between the two groups [p=0.10]. G-CSF group had a twin pregnancies while in control group there was no twin pregnancy
Conclusion: Our result demonstrates the possibility that pregnancy outcome is better in women with repeated unexplained In vitro fertilization failure who are treated with G-CSF
RESUMO
Objective: Cryopreservation of immature testicular tissue should be considered as an important factor for fertility preservation in young boys with cancer. The objective of this study is to investigate whether immature testicular tissue of mice can be successfully cryopreserved using a simple vitrification procedure to maintain testicular cell viability, proliferation, and differentiation capacity
Materials and Methods: In this experimental study, immature mice testicular tissue fragments [0.5-1 mm[2]] were vitrified-warmed in order to assess the effect of vitrification on testicular tissue cell viability. Trypan blue staining was used to evaluate developmental capacity. Vitrified tissue [n=42] and fresh [control, n=42] were ectopically transplanted into the same strain of mature mice [n=14] with normal immunity. After 4 weeks, the graft recovery rate was determined. Hematoxylin and eosin [H and E] staining was used to evaluate germ cell differentiation, immunohistochemistry staining by proliferating cell nuclear antigen [PCNA] antibody, and terminal deoxynucleotidyl transferase [TdT] dUTP Nick-End Labeling [TUNEL] assay for proliferation and apoptosis frequency
Results: Vitrification did not affect the percentage of cell viability. Vascular anastomoses was seen at the graft site. The recovery rate of the vitrified graft did not significantly differ with the fresh graft. In the vitrified graft, germ cell differentiation developed up to the secondary spermatocyte, which was similar to fresh tissue. Proliferation and apoptosis in the vitrified tissue was comparable to the fresh graft
Conclusion: Vitrification resulted in a success rates similar to fresh tissue [control] in maintaining testicular cell viability and tissue function. These data provided further evidence that vitrification could be considered an alternative for cryopreservation of immature testicular tissue