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Showing 9 results for Dna Fragmentation

Noush Afarin Khajavi, Shahnaz Razavi, Mohammad Mardani, Marziyeh Tavalaee, Mohammad Reza Deemeh, Mohammad Hossein Nasr-Esfahani,
Volume 7, Issue 2 (7-2009)
Abstract

Background: Sperm selection for ICSI based on morphology and motility might not be relevant to chromatin integrity. Thus sperm selection based on sperm characteristics has been suggested.
Objective: The aim of this study was to compare the efficiency of Zeta method with routine Density Gradient Centrifugation method (DGC) for the selection of sperm with higher DNA integrity.
Materials and Methods: Semen samples were obtained from 63 individuals referring to Andrology Unit of Isfahan Fertility and Infertility Center. Semen analysis was carried out according to WHO criteria. Each semen sample was divided into three equal portions. One portion was used as control, the second portion was used for Zeta method and the third portion underwent DGC method. Each portion was evaluated to DNA integrity by TUNEL assay. Student t-test was carried out using SPSS and p-value lower than 0.05 was considered significant.
Results: The mean number of sperm DNA fragmentation in Zeta and DGC methods were significantly decreased compare to the control group (p<0.001). In addition, Zeta method was more efficient than the DGC method in the selection of sperm with intact DNA (p<0.001).
Conclusion: The Zeta method appears to be a suitable procedure to recover sperm with normal DNA integrity.
Hamed Fanaei, Samira Khayat, Iman Halvaei, Vahid Ramezani, Yaser Azizi, Amir Kasaeian, Jalal Mardaneh, Mohammad Reza Parvizi, Maryam Akrami,
Volume 12, Issue 2 (2-2014)
Abstract

Background: Oxidative stress in teratozoospermic semen samples caused poor assisted reproductive techniques (ART) outcomes. Among antioxidants, ascorbic acid is a naturally occurring free radical scavenger and as such its presence assists various other mechanisms in decreasing numerous disruptive free radical processes.
Objective: The main goal of this study was to evaluate potential protective effects of ascorbic acid supplementation during in vitro culture of teratozoospermic specimens.
Materials and Methods: Teratozoospermic semen samples that collected from 15 volunteers were processed, centrifuged and incubated at 37PoPC until sperm swimmed-up. Supernatant was divided into four groups and incubated at 37PoPC for one hour under different experimental conditions: Control, 10 μm A23187, 600μm ascorbic acid and 10 μm A23187+600 μm ascorbic acid. After incubation sperm motility, viability, acrosome reaction, DNA damage and malondialdehyde levels were evaluated.
Results: Our results indicated that after one hour incubation, ascorbic acid significantly reduced malondialdehyde level in ascorbic acid group (1.4±0.11 nmol/ml) compared to control group (1.58±0.13 nmol/ml) (p<0.001). At the end of incubation, progressive motility and viability in ascorbic acid group (64.5±8.8% and 80.3±6.4%, respectively) were significantly (p<0.05 and p<0.001, respectively) higher than the control group (54.5±6.8% and 70.9±7.3%, respectively). A23187 significantly (p<0.0001) increased acrosome reaction in A23187 group (37.3±5.6%) compared to control group (8.5±3.2%) and this effect of A23187 attenuated by ascorbic acid in ascorbic acid+A23187 group (17.2±4.4%). DNA fragmentation in ascorbic acid group (20±4.1%) was significantly (p<0.001) lower than controls (28.9±4.6%).
Conclusion: In vitro ascorbic acid supplementation during teratozoospermic semen processing for ART could protect teratozoospermic specimens against oxidative stress, and it could improve ART outcome.
Zohreh Khodayari Naeini, Hassan Hassani Bafrani, Hossein Nikzad,
Volume 12, Issue 4 (5-2014)
Abstract

Background: An effect of cryopreservation on human sperm is sublethal cryodamage, in which cell viability post-thaw is lost more rapidly at later times than in fresh cells.
Objective: This study examined whether the addition of an antioxidant to cryopreservation medium could improve the post-thaw parameters and evaluation of sperm chromatin quality of cryopreserved human spermatozoa from men with normal semen parameters.
Materials and Methods: Semen samples (n=35) were collected by masturbation and assessed following WHO standards. Individual samples were classified as two portions. One portion (n=10) was for elucidate the concentration of ebselen.Then the samples(n=25) were divided in to 5groups.The first aliquot remained fresh.The second aliquots was mixed with cryopreservation medium.The third aliquots were mixed with cryopreservation medium containing solvent of ebselen.The forth and fifth aliquots were mixed with cryopreservation medium containing 1.25 and 2.5 µm of ebselen.Samples were frozen and thawed samples were assessed for sperm parameters.Three-way ANOVA Multivariate measures were used to assess. According to this assesment the differences are observed in existent groups in post-thaw count, motility index, vitality staining, and morphology and DNA fragmentation.
Results: After freezing the media containing of ebselen, DNA fragmentation is significantly different in comparison with control group. ebselen with 1.25 µm dose was significantly associated with post-thaw DNA fragmentation (p=0.047). Similarly ebselen with 2.5 µm dose was significantly associated with post-thaw DNA fragmentation (p=0.038). But other parameters were not altered.
Conclusion: These results suggest that the addition of ebselen to cryopreservation medium doesnot improve post-thaw parameters and DNA fragmentation of sperm
Jalil Hosseini, Azar Mardi Mamaghani, Hani Hosseinifar, Mohammad Ali Sadighi Gilani, Farid Dadkhah, Mahdi Sepidarkish,
Volume 14, Issue 8 (8-2016)
Abstract

Background: Although the effectiveness of ginger as an antioxidant agent has been exploited, little human research has been conducted on its activity on male reproductive functions.
Objective: This study was designed to investigate the effects of ginger (Zingiber officinale) on sperm DNA fragmentation (SDF) in infertile men.
Materials and Methods: This randomized double-blind, placebo-controlled trial with a 1:1 allocation was performed on 100 infertility treatment candidates who were admitted to Royan Institute for Reproductive Biomedicine, Tehran, Iran. Patients were randomly assigned to receive one of two treatments: ginger and placebo. Patients were given a 3-month oral treatment (members received capsules containing 250 mg of ginger powder twice a day in ginger and a placebo in other group). Before and after treatment, standardized semen samples were obtained to determine sperm concentration, motility, and SDF according to World Health Organization.
Results: There was no significant difference between two groups regarding SDF at baseline (53.48. 95%CI: 37.95-69.02) in cases and (56.75, 95%CI: 40.01-73.5) in controls. The average positive percentage of SDF in patients receiving ginger (17.77, 95%CI: 6.16-29.39) was lower compared with placebo (40.54, 95%CI: 23.94-57.13) after three month of treatment (p=0.02). In multivariate analysis, SDF was significantly lower in patients receiving ginger compared with placebo (mean difference: 3.21, 95%CI: 0.78-5.63, p=0.009). There were no significant differences between two groups regarding to semen parameters.
Conclusion: The present study has demonstrated that ginger in a controlled study of efficacy was effective in decreasing SDF in infertile men.
Soheila Pourmasumi, Parvin Sabeti, Tahereh Rahiminia, Esmat Mangoli, Nasim Tabibnejad, Ali Reza Talebi,
Volume 15, Issue 6 (7-2017)
Abstract

The sperm DNA damage may occur in testis, genital ducts, and also after ejaculation. Mechanisms altering chromatin remodeling are abortive apoptosis and oxidative stress resulting from reactive oxygen species. Three classifications of intratesticular, post-testicular, and external factors have been correlated with increased levels of sperm DNA damage which can affect the potential of fertility. Alcohol consumption may not increase the rate of sperm residual histones and protamine deficiency; however, it causes an increase in the percentage of spermatozoa with DNA fragmentation and apoptosis. In a medical problem as spinal cord injury, poor semen parameters and sperm DNA damage were reported. Infection induces reactive oxygen species production, decreases the total antioxidant capacity and sperm DNA fragmentation or antigen production that lead to sperm dysfunctions and DNA fragmentation. While reactive oxygen species generation increases with age, oxidative stress may be responsible for the age-dependent sperm DNA damage. The exposing of reproductive organs in older men to oxidative stress for a long time may produce more DNA-damaged spermatozoa than youngers. Examining the sperm chromatin quality in testicular cancer and Hodgkin’s lymphoma patients prior to chemotherapy demonstrated the high incidence of DNA damage and low compaction in spermatozoa at the time of diagnosis. In chemotherapy cycles with genotoxic agents in cancer patients, an increase in sperm DNA damage was shown after treatment. In overall, those factors occurring during the prenatal or the adult life alter the distribution of proteins associated with sperm chromatin induce changes in germ cells which can be detected in infertile patients.
Mahnaz Heidari, Niknam Lakpour, Mahsa Darbandi, Sara Darbandi, Saeideh Shani, Leila Goharbakhsh, Ghazaleh Cheshmi, Mohammad Mehdi Akhondi, Mohammad Reza Sadeghi,
Volume 16, Issue 7 (7-2018)
Abstract

Background: Sperm processing methods separate motile sperms with good morphology from dead and abnormal forms of sperms, immature germ cells, and non-sperm cells.
Objective: The propose of this study was to compare the efficacy of upstream and swim-up processing techniques to separate sperms with the high quality especially in relation to sperm chromatin integrity.
Materials and Methods: This experimental study used semen samples from 60 normozoospermic men. Specimens were divided into equal aliquots for processing by swim up (group A), and upstream (group B) methods and compare with control by raw semen (group C). Sperm concentration, morphology, motility, DNA fragmentation and chromatin maturation were measured in these three groups.
Results: The results revealed that sperm concentration in the swim up samples was significantly greater than upstream samples (p≤0.04). as addition, motile sperm recovery including the percentage of progressive motility and a total number of motile sperm was better in the swim-up compared to an upstream method and raw semen (p≤0.001). The cell debris and seminal fluid were equally removed by both methods and the percentage of normal forms was also similar in both procedures (p≥0.4). In addition, sperm DNA fragmentation and chromatin maturation were not significantly different between the three groups (p≥0.1).
Conclusion: According to results, apparently the upstream method had no significant efficiency to separate good quality sperms compare to swim up. Therefore, swim up seems to be a simple, inexpensive, reliable and widely available method with an efficient yield to separate motile sperm with good morphology and better chromatin integrity for insemination in the infertility clinics.
Peyman Salehi, Seyedeh Zahra Shahrokhi, Tayyebeh Kamran, Ali Ajami, Sana Taghiyar, Mohammad Reza Deemeh,
Volume 17, Issue 2 (2-2019)
Abstract

Background: The effect of antioxidant therapy on sperm DNA fragmentation index (DFI) and achieving natural pregnancy were under debate. Very few studies have showed the rate of pregnancy rate after the antioxidant therapy due to ethical and technical limitations.
Objective: The aim of this cohort study was to determine the improvement rate of sperm DFI and natural pregnancy rate after the antioxidant therapy in infertile men.
Materials and Methods: 1645 infertile men were subjected for this study from May 2015 to December 2017. The Spermogram and sperm DFI were assessed using World Health Organization (WHO) 2010-based protocols and sperm chromatin structure assay (SCSA), respectively, in sperm samples before and after antioxidant therapy.
Results: The total sperm DFI improvement rate was 38.9% in the total population. Sperm DFI improvement had close correlation with total motility (r= 0.731, p= 0.001) and progressive motility improvement (r= 0.885, p= 0.001); 16.8% of individuals who completed antioxidant therapy for nine months achieved natural pregnancy.
Conclusion: The results of the current study suggested that SCSA along with spermogram might be a suitable option for the evaluation of fertility potential. In addition, antioxidant therapy may be useful for men with high levels of sperm DFI. However, the rate of pregnancy was still low and other treatment protocols such as assisted reproductive technology may be necessary.
Zeynab Yazdanpanah, Mitra Heydari Nasrabadi, Zeynab Piravar,
Volume 19, Issue 1 (1-2021)
Abstract

Background: The examination of sperm parameters and sperm DNA integrity are necessary for male fertility expression. These parameters can be affected by method of sperm separation.
Objective: To measure the damage of each sperm separation method on the sperm parameters and sperm DNA integrity.
Materials and Methods: In this experimental study, semen samples of 20 infertile men with asthenoteratozoospermia (Infertility Research Center, Qom, Iran, 2017) were processed in three ways: density gradient centrifugation (DGC), cumulus column, and incubation with supernatant products of adipose tissue-derived adult stem cells (SPAS). The results of sperm parameters and DNA fragmentation before and after the process were statistically analyzed.
Results: The number of separated sperms by normal morphologies during the SPAS and the cumulus column was significantly more than the corresponding population in the DGC group. In addition, although all three methods have the same ability to increase total sperm motility and the number of recovered sperms, in the field of forwarding movement and DNA fragmentation, the SPAS method performed more efficiently (p = 0.021).
Conclusion: Sperm parameters and DNA fragmentation in the SPAS group were better than those in the DGC and cumulus column groups. Furthermore, it has been shown that the sperm capacity was increased with the SPAS method. However, the rearrangement of sperm chromatin by reducing the disulfide bridges and providing the possibility of re-histone over capacity causes a significant reduction in DNA fragmentation.
 
 

Behzad Abbasi, Homayoun Abbasi, Hassan Niroumand,
Volume 19, Issue 3 (3-2021)
Abstract

Background: Idiopathic male infertility is often treated empirically. A recent body of evidence has indicated the association between pro ± prebiotics administration and improvement in semen parameters.
Objective: To assess the effect of FamiLact (probiotic + prebiotic) administration on male subjects with idiopathic infertility.
Materials and Methods: Fifty-six men with idiopathic male infertility were randomly/equally divided into two groups. Men in the case and control groups received 500 mg of FamiLact and an identical placebo for 80 days, respectively. A semen sample was obtained from each of the participants before initiation and after the termination of the treatment course. Samples underwent regular semen analysis and were further analyzed to assess the level of DNA damage (sperm chromatin structure assay), oxidative stress (BODIPY C11 staining), and protamine deficiency (chromomycin-A3 staining) in spermatozoa.
Results: No significant difference was observed between the baseline values of both groups. After intervention, mean sperm concentration, motility, and normal morphology were significantly higher in the FamiLact group compared to the placebo group (p < 0.05). In the FamiLact receivers, we detected improvement regarding the following parameters: concentration, motility, abnormal morphology, sperm lipid peroxidation, and DNA fragmentation (p ≤ 0.02). Likewise, in the placebo group, we noticed a decrease in the post-medication mean value of DNA fragmentation (p = 0.03) while observing no significant difference regarding other parameters.
Conclusion: FamiLact administration improves sperm concentration, motility, and abnormal morphology and decrease sperm DNA damage, possibly through alleviating oxidative stress in the seminal fluid.


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