Showing 6 results for In Vitro
Bakhtiari M, Mahmoudi R, Sobhani A , Akbari M, Barbarestani M, Pasbakhsh P. , Sargolzaei Aval F, Hedayatpoor A,
Volume 64, Issue 9 (9-2006)
Abstract
Background: Freezing and thawing induce a number of insults to the sperm cells, such as low motility and low fertilization capability. For evaluation of hyaluronan (HA) supplementation on sperm characteristics, we investigated the effect of hyaluronan (HA) on mouse sperm before freezing and after thawing.
Methods: For this purpose we removed cauda epididimes from 24 male mice with aseptic method and freezed the semen in 1.8ml cryotubes with %18 raffinose and %3 skim milk cryoprotectant solution.We had 4 groups: group 1(fresh control) group 2(freeze control) group 3(supplemented 750 µg/ml HA to sperm before freezing) and group 4(supplemented 750 µg/ml HA to sperm after thawing). Fertility rate evaluated after routine IVF by counting two-cell stage embryos.
Results: HA supplementation (750µg/ml) after thawing improved fertilization capability parameters but supplementation before freezing had no effect on mentioned characteristic.
Conclusion: Acording to data of present study the hyaluronan supplemen- tation (750µg/ml) after thawing has the greatest effect on the fertility rate of sperms.
Karimzadeh H, Pakzad Sr, Mahmoudi M, Ajdary S, Norouzi M, Akbari M, Daram M, Jazayeri Jazayeri Sm,
Volume 67, Issue 3 (6-2009)
Abstract
Background: Hepatitis B
vaccination has been included in routine immunization of all
individuals according to WHO recommendations since 1991. Despite
successful coverage, 3-5% of recipients fail to mount a desirable
protection level of Ab. Vaccine failure results from: emergence of
mutation, immune failure of individuals, decrease in vaccine potency,
and etc. The quality of Hepatitis B vaccine should be evaluated by a
reliable method.
Methods: The amount of vaccine antigen was measured through the in vitro assay
of Hepatitis B vaccines which consists of multiple dilutions of the
reference material and samples. The preparations were evaluated by
Elisa to determine the amount of HBsAg. The data were analyzed by
parallel-line analysis software. The in vivo assay was performed by
inoculating multiple doses of the reference and sample preparations in
Balb/c mice. A control group was also inoculated with vaccine matrix.
Four weeks later, the mice sera were evaluated to determine the
presence of antibodies against Hepatitis B by Elisa method. The data
were analyzed by Probit analysis software.
Results: Both methods were set up in our laboratory by which different batches
of Hepatitis B vaccine were evaluated. It was observed that In vivo and
In vitro methods provide comparable results. Therefore we can use the
in vitro method for routine testing of HB vaccine quality control.
Conclusion: In vitro method can be used in place of In vivo method because of its
time and cost-effectiveness. Moreover, since no animals are used in in
vitro method, it complies well with the 3R concept (Reduction,
Refinement, and Replacement of animal testing) and the current tendency
to use alternative method.
Nasrin Moghadami Tabrizi , Khadijeh Adabi , Azra Azmoodeh , Sepideh Nekuei, Babak Dabirashrafi, Kamyar Dabirashrafi, Batool Ghorbani Yekta,
Volume 71, Issue 4 (7-2013)
Abstract
Background: Endometrioma of ovary is one of the common diseases during reproductive age and the effect of laparoscopic cystectomy of endometrioma on infertility is still matter of debate. We designed this case control study to evaluate the ovarian response to controlled ovarian hyperstimulation during IVF (In vitro fertilization) cycle following laparoscopic unilateral cystectomy of endometrioma.
Methods: In a case control study, we enrolled 30 women with history of unilateral laparoscopic cystectomy of ovarian endometrioma in stripping method who underwent IVF cycle in women Hospital, 2009-2012. The numbers of follicles in response to controlled ovarian hyperstimulation during IVF cycle in the ovary with history of unilateral laparoscopic cystectomy of endometrioma were compared with those from the contralateral ovary.
Results: The mean age (±SD) of patients was 32.3 (±3.4). The mean (±SD) diameter of excised ovarian endometrioma was 42.4 (±10.4) mm. Interval since ovarian surgery to induction ovulation was 2.7 (±2.6) years. Mean number of follicles in the ovary with history of unilateral laparoscopic cystectomy of endometrioma was 2.5 (±1.2) with the range of 1 to 5 and in the control ovary 3.9 (±1.4) with the range of 1 to 6. There was significant difference in the number of follicles in the ovary with laparascopic cystectomy of endometrioma compared with opposite one (P<0.001).
Conclusion: Laparoscopic cystectomy for unilateral endometrioma is associated with a reduced ovarian response to controlled ovarian hyperstimulation during IVF cycle. We did not find any statistically significant difference in reduced ovarian response with regard to patients age, body mass index, size and location of the cyst, and time duration since ovarian cystectomy.
Marzieh Mehrafza, Azadeh Raoufi, Parvaneh Abdollahian, Zahra Nikpouri, Mehri Nasiri, Ahmad Hosseini,
Volume 71, Issue 8 (11-2013)
Abstract
Background: Polycystic ovarian syndrome (PCOS) is the most common endocrinological disorders that affect approximately 5-7% of women in reproductive age. There is not any consensus about the efficient in vitro fertilization (IVF) protocol for patients with PCOS. The aim of the present study was to compare the half and one-third dose depot gonadotropin-releasing hormone (GnRH) agonist protocols versus the GnRH antagonist protocol in PCOS patients.
Methods: In the present study, we retrospectively evaluated 119 infertile women with PCOS. The patients entered in the study in accordance with Rotterdam criteria. According to GnRH analogue used for pituitary suppression, patients were divided into three groups: half and one-third dose depot GnRH agonist protocols and GnRH antagonist protocol. In GnRH agonist protocol, half or one-third dose depot Decapeptyl (1.875 mg, 1.25 mg) was injected on 21st day of previous cycle. In GnRH antagonist cycles, cetrotide 0.25 mg were administered daily when the leading follicles reached 14 mm. All basal and controlled ovarian hyperstimulation (COH) characteristics were analyzed.
Results: Basal characteristics including: age, FBS, prolactin, hirsutism, length of menstrual cycle were similar between 3 groups. Statically significant decreases in days of stimulation, number of gonadotrophin ampoules and metaphase II (MII) oocytes were found in GnRH antagonist protocol (P<0.001, P<0.001 and P=0.045), while the decrease in biochemical pregnancy (P=0.083) and live birth rate (P=0.169) wasn't significant. Number of embryos transferred were similar in the half and one-third dose depot GnRH agonist and GnRH antagonist cycles (P=0.881). The incidence of OHSS weren't significantly different between 3 groups (5%, 4.9% and 12.8%, P=0.308).
Conclusion: Our study suggest that one-third dose depot GnRH agonist protocol could be a suitable choice for treatment of PCOS because of lower incidence of ovarian hyperstimulation syndrome (OHSS) as compared with half dose depot GnRH agonist and higher pregnancy rate as compared with GnRH antagonist.
Farid Abassi , Mandana Sattari , Noushin Jalayer Naderi, Marzie Sorooshzadeh ,
Volume 74, Issue 5 (8-2016)
Abstract
Background: Hydroxyapatite nanoparticles have a more surface contact and solubility than conventional hydroxyapatite. Hydroxynanoparticles enhances the biological and mechanical properties of new regenerated tissues. The hydroxyapatite nanoparticles have received attention as a new and effective osseous graft for using as scaffolds in bone regeneration. The reports on hydroxyapatite nanoparticles biocompatibility are controversial. It has been shown that hydroxyapatite nanoparticles induces inflammatory reaction and apoptosis. The aim of the present study was to evaluate the cytotoxicity of nano-hydroxyapatite on the human epithelial cells.
Methods: The study was experimental and completed in vitro. The study was carried out in department of Immonulogy, Faculty of Medicine, Shahid Beheshti University of Medical Sciences in November 2014. The human-derived oral epithelium cell line (KB) obtained from Pasteur Institute, Tehran, Iran were exposed to hydroxyapatite nanoparticles at 0.01, 0.05, 0.1, 0.5, 0.75, 1, 2.5 and 5 mg/ml concentrations in 24, 48 and 72 hours. Rod-shaped hydroxyapatite nanoparticles with 99% purity and maximum 100 nm sized particles were used. Methylthiazol tetrazolium bromide (MTT) method was employed for cell vitality evaluation. Enzyme-linked immunosorbent assay (ELISA) was used for assessing the viability of cells. Distilled water and fetal bovine serum (FBS) were positive and negative controls. ANOVA and Duncan tests were used for statistical analysis.
Results: The cytotoxicity of different concentrations of hydroxyapatite nanoparticles on human-derived oral epithelium cell line in 24 (P< 0.001), 48 (P< 0.001) and 72 hours (P< 0.001) was significantly different. The nano-hydroxyapatite particles at 0.5 to 1 mg/ml had the highest cytotoxicity effect on human-derived oral epithelium cells in 24, 48 and 72 hours. Lower concentrations than 0.05 mg/ml had the best biocompatibility properties in 24, 48 and 72 hours.
Conclusion: Hydroxyapatite nanoparticles had a good biocompatibility. The biocompatibility of hydroxyapatite nanoparticles were dose and time dependent. The lower concentrations than 0.05 mg/ml of nano-hydroxyapatite had the best biocompatibility over time.
Elham Naghshineh, Minoo Movahedi , Hatav Tehrani , Maryam Hajhashemi , Ferdows Mehrabian, Fatemeh Jahani, Fedyeh Haghollahi,
Volume 79, Issue 12 (3-2022)
Abstract
Background: Assisted reproductive techniques have increased the chances of pregnancy for couples looking for a way to treat their infertility. To increase the effectiveness of these methods, studies are needed to identify the determinants of a successful pregnancy with these techniques.
Methods: The present study is a cross-sectional retrospective study that was performed on 253 couples who were referred for infertility treatment to the infertility clinic of Shahid Beheshti Hospital in Isfahan from April 2019 to March 2020 to evaluate the results of pregnancy in vitro fertilization. Demographic, clinical, and laboratory data from patient records were collected and entered into checklists.
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Results: Out of 253 couples, eighty-five (33.6%) became pregnant by IVF. The mean age of women with successful pregnancies was 33.96±5.2 years and in the unsuccessful pregnancies was 35.84±5.07 years. The results of this study showed that women who had a successful pregnancy after IVF were significantly younger than women who did not have a successful pregnancy (P=0.006). In the classification of patients into two groups of positive and negative pregnancies, younger age, adequate vitamin D levels, and higher sperm motility were the determinants of pregnancy in the first period of fertilization (Fresh protocol). Also, the existence of a failed history of infertility treatment in couples has been introduced as a negative factor for IVF fertility. 13(15.9%) abortions occurred and 11(12.9%) infants who were born with this method needed intensive care.
Conclusion: Lower age at the time of fertilization, higher vitamin D levels, and more active sperms were found to have important and prognostic roles in the success of pregnancy by in vitro fertilization technique.
The results of the present study showed that, Increased unsuccessful treatment has been associated with the history of failed treatment. Therefore, to respond to the relationship between previous infertility treatments and success in subsequent pregnancies in the IVF process, It is recommended to conduct studies with larger sample size and at a higher time efficiency.
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