Entity

Time filter

Source Type


Cheraghi E.,Arak University | Mehranjani M.S.,Arak University | Shariatzadeh M.A.,Arak University | Esfahani M.H.N.,Royan Institute of Biotechnology | Ebrahimi Z.,Obstetrics and Gynecology Unit
Reproduction, Fertility and Development | Year: 2016

Polycystic ovary syndrome (PCOS) is associated with low-quality oocytes. The aim of the present study was to investigate the effects of metformin (MET), N-acetylcysteine (NAC) and their combination on follicular fluid parameters, oocytes and embryo quality in PCOS patients. A prospective randomised placebo-controlled pilot study on 60 Iranian women with PCOS (aged 25-35 years) undergoing intracytoplasmic sperm injection (ICSI) was designed. Women were divided into four groups (n≤15 in each): (1) an MET, administered 1500mg day-1 MET; (2) an NAC group, administered 1800mg day-1 NAC; (3) an NAC + MET group; and (4) a placebo group. Drugs were administered from the 3rd day of previous cycle until the day of oocyte aspiration (6 weeks treatment in total). Data were analysed by one-way ANOVA, with significance set at P<0.05. The number of immature and abnormal oocytes decreased significantly in the NAC compared with placebo group, with a concomitant increase in the number of good-quality embryos in the NAC group (P<0.05). Malondialdehyde levels decreased significantly in the NAC and NAC + MET groups compared with the placebo-treated group (P<0.02). In addition, there were significant decreases in leptin levels in the NAC, MET and NAC + MET groups compared with the placebo group (P<0.001). Insulin and LH levels were significantly lower in the MET and NAC groups compared with the placebo-treated group (P<0.02). We concluded that NAC improves oocyte and embryo quality and could be administered as an alternative to MET. © CSIRO 2016. Source


Asgari V.,Royan Institute of Biotechnology | Hosseini S.M.,Royan Institute of Biotechnology | Forouzanfar M.,Islamic Azad University at Marvdasht | Hajian M.,Royan Institute of Biotechnology | And 2 more authors.
Cryobiology | Year: 2012

In order to investigate whether the kinetics and stage of embryo development affect cryosurvival of in vitro produced bovine embryos, cleaved embryos were categorized in six groups based on their developmental kinetics regarding the stage of embryonic block in bovine (8-16 cell stage): I and II - early (day 2) and late (day 3) 5-8 cell, III and IV - early (day 3) and late (day 4) 8-16 cell, and V and VI - early (day 4) and late (day 5) morula. The cryosurvival and developmental competence of these embryos were compared with each other and also with the corresponding control groups. The potential of 5-8 cell stage embryos to survive vitrification and further develop towards blastocyst stage was significantly lower than vitrified and un-vitrified 8-16 cell and morula stage embryos. These results suggest that, the survival rate and potential of embryos to develop towards blastocyst stage might be affected by the kinetic of the embryo development. Moreover, the results of this study indicated that the optimal stages of early embryo vitrification are post-embryonic block. © 2012 Elsevier Inc. Source


Motiei M.,Royan Institute of Biotechnology | Motiei M.,Payame Noor University | Tavalaee M.,Royan Institute of Biotechnology | Rabiei F.,Royan Institute for Biotechnology | And 4 more authors.
Andrologia | Year: 2013

Heat-shock protein A2 (HSPA2) is a testis-specific member of the HSP70 family known to correlate with sperm maturity, function and fertility. The aim of this study was to compare expression of HSPA2 in fertile and infertile individuals using a recently marketed highly purified polyclonal antibody. Thus, after analysing sperm concentration, motility and morphology in semen sample of 49 individuals with male factor infertility and 47 fertile individuals according to World Health Organization guidelines, we evaluated HSPA2 by microscope florescence, flow cytometry, Western blot and RT-PCR. We observed higher percentage of sperm expressing HSPA2 in anterior and equatorial regions in fertile than infertile individuals by microscope fluorescence. Percentage of sperm expressing HSPA2 in two conditions (fixed permeabilised and capacitated) by flow cytometry showed that percentage of HSPA2-positive sperm in fixed permeabilised and also capacitated samples was significantly different between fertile and infertile individuals. Western blot analysis of HSPA2 in semen samples revealed high variation within the fertile and infertile population. The results of RT-PCR revealed higher expression of HSPA2 in the fertile compared to infertile individuals, but this difference was not significant. According to the results, we suggest that HSPA2 expression is heterogeneously expressed on different part of fixed permeabilised sperm and its expression is significantly higher in fertile compared to infertile individuals. The surface expression of this protein significantly increases following capacitation in both fertile and infertile individuals. HSPA2 expression significantly correlates with sperm concentration and morphology. Therefore, aberrant HSPA2 expression may play an important role in capacitation and fertilisation processes. © 2012 Blackwell Verlag GmbH. Source

Discover hidden collaborations