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Sperm DNA fragmentation

Budimir S Ilić, Ana Kolarević, Gordana Kocić, Andrija Šmelcerović
Apoptotic and/or ROS-induced DNA fragmentation in sperm cells may contribute to the development of male infertility. As the known dietary antioxidant, ascorbic acid prevents ROS production and protects sperm cells from DNA damage. Here, we found that ascorbic acid has the ability to inhibit DNase I, one of the main endonucleases involved in DNA fragmentation during apoptosis. Site Finder and Molecular docking defined the ascorbic acid interactions with the most important residues of DNase I, including H-donor interactions with Asp 168 and Asn 170, and H-acceptor interaction with Asn 170...
March 15, 2018: Biochemical and Biophysical Research Communications
Matheus Roque, Sandro C Esteves
Varicocele, the leading cause of male infertility, can impair sperm quality and fertility via various oxidative stress mechanisms. An imbalance between excessive reactive oxygen species production and antioxidant protection causes alterations in nuclear and mitochondrial sperm DNA, thus rendering a subset of varicocele men less fertile. In particular, sperm DNA fragmentation is usually elevated in men with clinical varicocele in both abnormal and normal semen parameters by the current World Health Organization criteria...
March 14, 2018: International Urology and Nephrology
Jin-Chun Lu, Jun Jing, Li Chen, Yi-Feng Ge, Rui-Xiang Feng, Yuan-Jiao Liang, Bing Yao
BACKGROUND: Many factors may lead to sperm DNA damage. However, it is little known that the correlations of sperm DNA damage with obesity-associated markers, and reproductive hormones and lipids levels in serum and seminal plasma. METHODS: In our prospective study, a total of 1 010 subfertile men, aged from 18 to 50 years old, were enrolled from August 2012 through June 2015. Their obesity-associated markers, semen parameters, sperm acrosomal enzyme activity, seminal plasma biochemical markers, and reproductive hormones and lipids levels in serum and seminal plasma were detected...
March 14, 2018: Reproductive Biology and Endocrinology: RB&E
H Amor, A Zeyad, Y Alkhaled, M Laqqan, A Saad, H Ben Ali, M E Hammadeh
The aim of this study was to assess the stability of nuclear and mitochondrial DNA (n-DNA and mt-DNA) of spermatozoa under freeze-thawing and to find out the correlation between them and their association with standard sperm parameters. Forty-three semen samples were collected from fertile (G.1; n = 29) and sub-fertile (G.2; n = 14). N-DNA fragmentation was determined by TUNEL assay and mt-DNA using caspase 3 staining. Each semen sample was frozen at -196°C by the programmed freezer. Freeze-thawing decrease vitality, total motility and membrane integrity from (43...
March 12, 2018: Andrologia
Clara Malo, Elizabeth G Crichton, Jane M Morrell, Budhan S Pukazhenthi, Anders Johannisson, Rebecca Splan, Julian A Skidmore
Colloids have been successfully used in a number of species to improve sperm populations for IVF and for cryopreservation The usefulness of Single Layer Centrifugation (SLC) for freezing dromedary camel spermatozoa in two different extenders was evaluated by examining the motility, viability, acrosome status, DNA integrity, and ability of cryopreserved sperm to penetrate oocytes in vitro in a heterologus IVF system. Two ejaculates from each of five males were divided into four aliquots: two were processed by SLC (selected) while two were centrifuged without colloid (control)...
February 12, 2018: Animal Reproduction Science
Alexander N Yatsenko, Paul J Turek
PURPOSE: To examine current evidence of the known effects of advanced paternal age on sperm genetic and epigenetic changes and associated birth defects and diseases in offspring. METHODS: Review of published PubMed literature. RESULTS: Advanced paternal age (> 40 years) is associated with accumulated damage to sperm DNA and mitotic and meiotic quality control mechanisms (mismatch repair) during spermatogenesis. This in turn causes well-delineated abnormalities in sperm chromosomes, both numerical and structural, and increased sperm DNA fragmentation (3%/year of age) and single gene mutations (relative risk, RR 10)...
March 9, 2018: Journal of Assisted Reproduction and Genetics
Katerina Chatzimeletiou, Nikiforos Galanis, Alexandros Karagiannidis, Antonia Sioga, George Pados, Dimitrios Goulis, Antonis Kalpatsanidis, Basil C Tarlatzis
Ankylosing spondylitis affects 0.1%-0.5% of the adult population. The aim was to investigate the possible effects of both the disease and its treatment on semen quality by performing a highly detailed analysis in a man with ankylosing spondylitis, presenting for infertility. Sperm characteristics were evaluated by light microscopy, morphology by electron microscopy (transmission electron microscopy), DNA fragmentation by terminal deoxynucleotidyl transferase dUTP nick end labeling using fluorescence microscopy and chromosomal abnormalities by fluorescence in situ hybridisation using probes for chromosomes 13,15,16,18,21,22,X and Y...
2018: SAGE Open Medical Case Reports
Ammar Oumaima, Ajina Tesnim, Haouas Zohra, Sallem Amira, Zidi Ines, Chakroun Sana, Grissa Intissar, Ezzi Lobna, Jlali Ali, Mehdi Meriem
DNA fragmentation can be deleterious on spermatozoon morphology but the pathogenesis of teratozoospermia associated with DNA breaks is not fully understood, even if oxidative attacks and defects in chromatin maturation are hypothesized. Therefore, this study is one of the first to clarify on the underlying hypothesizes behind such observations. The objectives of our study were to assess the role of oxidative attacks in DNA damage pathogenesis in ejaculated spermatozoa from patients with isolated teratozoospermia...
March 5, 2018: Environmental Science and Pollution Research International
Niyazi Küçük
The questionable effectiveness of routine sperm parameters in determining male factor infertility problems and increasing the success rates of assisted reproductive techniques have led to the investigation of more detailed sperm parameters that could affect the male fertility and reproduction. Thus, the effects of different sperm parameters such as sperm DNA integrity was started to be investigated thanks to the previously described methods such as single cell gel electrophoresis (COMET) assay, sperm chromatin structure assay (SCSA), acridine orange test (AOT), terminal deoxynucleotidyl transferase-mediated deoxyuridine (TdT) triphosphate (dUTP) nick end labeling (TUNEL) assay and sperm chromatin dispersion (SCD) test...
January 2018: Turkish Journal of Urology
Dana Ley, Jeffrey Jones, John Parrish, Sana Salih, Freddy Caldera, Edna Tirado, Benjamin Leader, Sumona Saha
There are few data on the effects of methotrexate on reproductive capacity in men with inflammatory bowel diseases (IBD). We performed a case-control study to determine the effects of methotrexate on sperm quality and genetic integrity. We compared sperm samples from 7 men with IBD who had been exposed to methotrexate for at least 3 months with sperm samples collected from 1912 age-matched men at fertility centers (controls), where sperm parameters would be expected to be worse than those of the general population...
February 23, 2018: Gastroenterology
M-H Zhang, L-P Zhai, Z-Y Fang, A-N Li, Y Qiu, Y-X Liu
The aim of this study was to observe sperm aneuploidy, DNA integrity, seminal alpha-glucosidase (NAG) and acrosin activity (AA) under testicular heat stress (SH). Spermatozoa were obtained from 30 healthy adult volunteers subjected to scrotal warming at 43°C for 30-40 min on two successive days per week for 3 months between February 2012 and September 2016. Aniline blue (AB), acridine orange (AO) staining, TUNEL assay and FISH analysis to evaluate sperm function, sperm DNA integrity and chromosomal abnormalities were carried on before, during and after SH...
February 22, 2018: Andrologia
Shang-Shu Ding, Ping Sun, Zhou Zhang, Xiang Liu, Hong Tian, Yong-Wei Huo, Li-Rong Wang, Yan Han, Jun-Ping Xing
Background: The worsening of semen quality, due to the application of Wi-Fi, can be ameliorated by Vitamin E. This study aimed to demonstrate whether a moderate dose of trolox, a new Vitamin E, inhibits oxidative damage on sperms in vitro after exposure to Wi-Fi radiation. Methods: Each of the twenty qualified semen, gathered from June to October 2014 in eugenics clinic, was separated into four aliquots, including sham, Wi-Fi-exposed, Wi-Fi plus 5 mmol/L trolox, and Wi-Fi plus 10 mmol/L trolox groups...
February 20, 2018: Chinese Medical Journal
Ali Zeyad, Mohammed Hamad, Houda Amor, Mohamad Eid Hammadeh
The Aim of this study was to evaluate the effects of bacteriospermia on human sperm parameters, nuclear protamines, DNA integrity and ICSI outcome in patients enrolled for ICSI treatment. 84 unselected couples consulting in infertility and obstetrics clinic and enrolled for ICSI treatment were included in this study. The semen specimens were screened bacteriologically; semen and sperm parameters were also evaluated according to WHO guidelines. DNA integrity, protamines concentration and protamine deficiency were estimated by TUNEL assay, AU-PAGE and Chromomycin (CMA3) respectively...
February 12, 2018: Reproductive Biology
Liana Bosco, Tiziana Notari, Giovanni Ruvolo, Maria C Roccheri, Chiara Martino, Rosanna Chiappetta, Domenico Carone, Giosuè Lo Bosco, Laura Carrillo, Salvatore Raimondo, Antonino Guglielmino, Luigi Montano
Environmental factors could have a key role in the continuous and remarkable decline of sperm quality observed in the last decades. This study compared the seminal parameters and sperm DFI in men living in areas with different levels of air pollution. Results demonstrate that both steel plants workers and patients living in a high polluted area show a mean percentage of sperm DNA fragmentation above 30%, highlighting a clear sperm damage. In this work, two different techniques were used to measure sperm DNA damage in patients' groups, finding in both cases a high sperm DFI in patients living in polluted areas...
February 7, 2018: Environmental Toxicology and Pharmacology
Jill A Jenkins, Michael R Rosen, Rassa O Draugelis-Dale, Kathy R Echols, Leticia Torres, Carla M Wieser, Constance A Kersten, Steven L Goodbred
Lake Mead National Recreational Area (LMNRA) serves as critical habitat for several federally listed species and supplies water for municipal, domestic, and agricultural use in the Southwestern U.S. Contaminant sources and concentrations vary among the sub-basins within LMNRA. To investigate whether exposure to environmental contaminants is associated with alterations in male common carp (Cyprinus carpio) gamete quality and endocrine- and reproductive parameters, data were collected among sub-basins over 7 years (1999-2006)...
February 10, 2018: Environmental Research
C Cebi Sen, N Yumusak, H I Atilgan, M Sadic, G Koca, M Korkmaz
This study was designed to investigate the potential radioprotective impact of melatonin on the testicular tissue and sperm quality in rat given radioactive iodine (RAI) therapy. Thirty-six male Wistar albino rats were randomly divided into three groups as untreated control (Group 1); oral radioiodine group (RAI, 111 MBq, administrated rats); and RAI+melatonin group (oral radioiodine and intraperitoneal 12 mg/kg/day melatonin, starting 2 days before and continuing for 1 week after oral RAI administration)...
February 11, 2018: Andrologia
Essraa M Al-Essawe, Anders Johannisson, Manuela Wulf, Christine Aurich, Jane M Morrell
Addition of seminal plasma (SP) prior to cryopreservation may influence stallion sperm cryosurvival. The objective of this study was to investigate the addition of pooled SP from "good" or "bad" freezer stallions to spermatozoa selected by single layer centrifugation (SLC) prior to cryopreservation on post-thaw sperm quality. Semen from 12 stallions was collected; 5 mL was frozen as control (C) and the remainder was processed by SLC to remove SP and was divided into three aliquots: i) SLC sample without SP (SLC); ii) SLC plus pooled SP from "good freezer" stallions (SLC-GF); iii) SLC plus pooled SP from "bad freezer" stallions (SLC-BF)...
February 1, 2018: Cryobiology
Ismail Kaarouch, Nouzha Bouamoud, Aicha Madkour, Noureddine Louanjli, Brahim Saadani, Said Assou, Smahane Aboulmaouahib, Saaid Amzazi, Henri Copin, Moncef Benkhalifa, Sefrioui Omar
This study assessed sperm quality declining on relation to paternal age and its impact on in vitro fertilization (IVF) outcomes in order to estimate the APA (Advanced Paternal Age) cutoff. For this, 83 couples undergoing IVF treatment for male factor infertility were enrolled. The women age was ≤39 years, whereas the men were divided in two groups: APA (n = 41; age≥40 years) and young (Y) (n = 42; age < 40 years). Conventional semen parameters (volume, concentration, motility, vitality and morphology) were analyzed in the collected sperm samples...
February 2, 2018: Molecular Reproduction and Development
E Tvrdá, C López-Fernández, P Sánchez-Martín, J Gosálvez
Static assessment of sperm DNA Fragmentation (SDF at the time of ejaculation or sperm thawing when cryopreserved) and the dynamic assessment of SDF (SDF assessed after T2 hr, T6 hr and T24 hr of sperm thawing) were used to establish cut-off values associated with sperm donors when compared with closely related normozoospermic patients. Cryopreserved samples from donors revealed SDF levels two times lower in comparison with the patients. Donor sperm DNA exhibited a 2.5 times higher longevity when compared with the patients...
February 2, 2018: Andrologia
L N G Adami, L B Belardin, B T Lima, J T Jeremias, M P Antoniassi, F K Okada, R P Bertolla
The aim of this study was to evaluate the antioxidant effect of in vitro supplementation with vitamin E in human spermatozoon incubated with an oxidative stress inducer. In this study, semen samples from 30 patients were collected and with one aliquot we performed semen analysis according to WHO. The remaining volume was divided into four aliquots: group C: incubated with BWW medium; group I: incubated with 5 mmol 1-1 hydrogen peroxide; group A: incubated with 40 μmol 1-1 vitamin E; and group AI: incubated with both them...
February 2, 2018: Andrologia
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