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Andrology

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https://www.readbyqxmd.com/read/29024507/dietary-patterns-and-semen-quality-a-systematic-review-and-meta-analysis-of-observational-studies
#1
REVIEW
A Arab, N Rafie, M Mansourian, M Miraghajani, H Hajianfar
A number of studies have examined the association between dietary patterns and semen quality, but the findings have been inconclusive. Herein, we conducted a systematic review and meta-analysis of observational studies to assess the association between dietary patterns and semen quality. PubMed, Cochrane library, Science direct, Scopus, Google Scholar, and ISI web of science databases were searched up to August 2016 for observational studies assessing the association between common dietary patterns and sperm quality markers...
October 12, 2017: Andrology
https://www.readbyqxmd.com/read/28992376/technologies-of-cryoprotectant-free-vitrification-of-human-spermatozoa-asepticity-as-criterion-of-effectiveness
#2
REVIEW
V Isachenko, G Rahimi, P Mallmann, R Sanchez, E Isachenko
This review describes 120 years history of technology for cryoprotectant-free cryopreservation of human spermatozoa by direct plunging into liquid nitrogen (vitrification). It is presented an explanation why cryoprotectant-free vitrification for some human ejaculates is better than conventional freezing and vitrification with the presence of cryoprotectants. Special attention is given to the extremely high viability of viruses, bacteria and micoplasmas after cryoprotectant-free cryopreservation in culture medium and even in distilled water...
October 9, 2017: Andrology
https://www.readbyqxmd.com/read/28992374/male-accessory-gland-inflammation-infertility-and-sexual-dysfunctions-a-practical-approach-to-diagnosis-and-therapy
#3
REVIEW
A E Calogero, Y Duca, R A Condorelli, S La Vignera
The role of urogenital inflammation in causing infertility and sexual dysfunctions has long been a matter of debate in the international scientific literature. The most recent scientific evidences show that male accessory gland infection/inflammation could alter, with various mechanisms, both conventional and biofunctional sperm parameters, and determine worst reproductive outcome. At the same time, the high prevalence of erectile dysfunction and premature ejaculation in patients with male accessory gland infection/inflammation underlines the close link between these diseases and sexual dysfunctions...
October 9, 2017: Andrology
https://www.readbyqxmd.com/read/28992369/predictive-value-of-pre-operative-inflammation-based-prognostic-scores-neutrophil-to-lymphocyte-ratio-platelet-to-lymphocyte-ratio-and-monocyte-to-eosinophil-ratio-in-testicular-sperm-extraction-a-pilot-study
#4
C Yucel, M Z Keskin, O Cakmak, B Ergani, C Kose, O Celik, E Islamoglu, M Ucar, G Koc, Z Kozacioglu
To investigate the ability of some hematologic prognostic scores demonstrating inflammation in predicting sperm presence in testicular sperm extraction (TESE). We retrospectively investigated the medical data of 430 patients with the diagnosis of non-obstruc tive azoospermia (NOA) who had undergone TESE operation consecutively in our institution between the dates of January 2009 and February 2017. In all, 352 patients with the diagnosis of NOA, with bilaterally palpable vas deferens, who had undergone TESE for the first time, were included in the study...
October 9, 2017: Andrology
https://www.readbyqxmd.com/read/28992366/possible-involvement-of-the-glucocorticoid-receptor-nr3c1-and-selected-nr3c1-gene-variants-in-regulation-of-human-testicular-function
#5
L Nordkap, K Almstrup, J E Nielsen, A K Bang, L Priskorn, M Krause, S A Holmboe, S B Winge, D L Egeberg Palme, N Mørup, J H Petersen, A Juul, N E Skakkebaek, E Rajpert-De Meyts, N Jørgensen
Perceived stress has been associated with decreased semen quality but the mechanisms have not been elucidated. It is not known whether cortisol, the major stress hormone in humans, can act directly via receptors in the testis, and whether variants in the gene encoding the glucocorticoid receptor (NR3C1) can possibly modulate the effect. To address these questions, we investigated the expression of the glucocorticoid receptor in human testicular tissue, including adult and fetal samples (n = 20) by immunohistochemical staining, and in silico analysis of publicly available datasets...
October 9, 2017: Andrology
https://www.readbyqxmd.com/read/28981994/contributors-to-the-substantial-variation-in-on-treatment-testosterone-levels-in-men-receiving-transdermal-testosterone-gels-in-randomized-trials
#6
S Bhasin, T G Travison, L O'Brien, J MacKrell, V Krishnan, H Ouyang, K Pencina, S Basaria
There is substantial inter-individual variability in serum testosterone levels in hypogonadal men treated with testosterone gels. We aimed to elucidate participant-level factors that contribute to inter-individual variability in testosterone levels during testosterone therapy. An exploratory aim was to determine whether polymorphisms in genes encoding testosterone-metabolizing enzymes could explain the variation in on-treatment testosterone concentrations in men who were randomized to testosterone arm in TOM Trial...
October 5, 2017: Andrology
https://www.readbyqxmd.com/read/28980456/human-sperm-motility-is-downregulated-by-the-ampk-activator-a769662
#7
V Calle-Guisado, A Hurtado de Llera, L González-Fernández, M J Bragado, L J Garcia-Marin
AMP-activated kinase (AMPK) plays a key function in maintaining cellular energy homeostasis. We recently identified and localized AMPK protein in human spermatozoa and showed that inhibition of AMPK activity significantly modified human sperm motility. Recently, AMPK has gained great relevance as prime target for pharmacological approaches in several energy-related pathologies and therefore pharmacological research is aimed to develop direct AMPK-activating compounds such as A769662. Our aim was to investigate the effect of A769662 in essential functional processes of human spermatozoa...
October 5, 2017: Andrology
https://www.readbyqxmd.com/read/28980413/isotretinoin-administration-improves-sperm-production-in-men-with-infertility-from-oligoasthenozoospermia-a-pilot-study
#8
J K Amory, K A Ostrowski, J R Gannon, K Berkseth, F Stevison, N Isoherranen, C H Muller, T Walsh
There is currently no effective medical therapy for men with infertility due to oligoasthenozoospermia. As men with abnormal sperm production have lower concentrations of 13-cis-retinoic acid in their testes, we hypothesized that men with infertility from oligoasthenozoospermia might have improved sperm counts when treated with isotretinoin (13-cis-retinoic acid). We conducted a single-site, single-arm, pilot study to determine the effect of therapy with isotretinoin on sperm indices in 19 infertile men with oligoasthenozoospermia...
October 5, 2017: Andrology
https://www.readbyqxmd.com/read/28973833/carnitine-partially-improves-oxidative-stress-acrosome-integrity-and-reproductive-competence-in-doxorubicin-treated-rats
#9
R E L Cabral, T B Mendes, V Vendramini, S M Miraglia
Doxorubicin has been largely used in anticancer therapy in adults, adolescents, and children. The efficacy of l-carnitine as an antioxidant substance has been confirmed both in humans and rats. Carnitine, present in testis and epididymis, is involved in sperm maturation. It is also effective in infertility treatment. As a continuation of a previous study, we evaluated whether some spermatic qualitative parameters, DNA integrity, chromatin structure, and fertility status, could be ameliorated by the carnitine treatment in adult rats, which were subsequently exposed to doxorubicin at pre-puberty...
October 3, 2017: Andrology
https://www.readbyqxmd.com/read/28973824/stallion-spermatozoa-surviving-freezing-and-thawing-experience-membrane-depolarization-and-increased-intracellular-na
#10
C Ortega Ferrusola, L Anel-López, J M Ortiz-Rodriguez, P Martin Muñoz, M Alvarez, P de Paz, J Masot, E Redondo, C Balao da Silva, J M Morrell, H Rodriguez Martinez, J A Tapia, M C Gil, L Anel, F J Peña
In order to gain insight of the modifications that freezing and thawing cause to the surviving population of spermatozoa, changes in the potential of the plasma membrane (Em) and intracellular Na(+) content of stallion spermatozoa were investigated using flow cytometry. Moreover, caspase 3 activity was also investigated and the functionality of the Na(+) -K(+) ATPase pump was investigated before and after freezing and thawing. Cryopreservation caused a significant (p < 0.001) increase in the subpopulation of spermatozoa with depolarized sperm membranes, concomitantly with an increase (p < 0...
October 3, 2017: Andrology
https://www.readbyqxmd.com/read/28950441/evaluation-of-sperm-dna-quality-in-men-presenting-with-testicular-cancer-and-lymphoma-using-alkaline-and-neutral-comet-assays
#11
K Kumar, S Lewis, S Vinci, A Riera-Escamilla, M-G Fino, L Tamburrino, M Muratori, P Larsen, C Krausz
Despite more cancers in young men over the past two decades, improvements in therapies give a greater chance to live full lives following treatment. Sperm genomic quality is variable following cancer diagnosis, so its assessment is important if sperm cryopreservation is being considered. Here, we evaluated DNA damage using two DNA damage assays: an alkaline and for the first time, a neutral Comet assays in men presenting with testicular cancer (n = 19 for alkaline and 13 for neutral group) and lymphoma (n = 13 for alkaline and 09 for neutral group) compared with fertile donors (n = 20 for alkaline and 14 for neutral group)...
September 26, 2017: Andrology
https://www.readbyqxmd.com/read/28950439/paternal-age-and-risk-of-testicular-germ-cell-tumors-a-cohort-study-of-1-000-000-men
#12
H Levine, L Keinan-Boker, A Leiba, E Derazne, A Rais, J D Kark
Testicular germ cell tumors (TGCT) are the most frequent cancer among young men, with increasing incidence worldwide. Advanced paternal age has been linked to adverse health outcomes in offspring, but reports on the association of paternal age with TGCT are few and inconsistent. We aimed to examine the relationship of paternal age (PAB) at birth with the risk of TGCT and by histologic type: seminoma and non-seminoma. A population-based cohort of 1,056,058 males, examined at ages 16-19 between the years 1980-2011, was linked to the Israel National Cancer Registry to obtain incident TGCT through 2012...
September 26, 2017: Andrology
https://www.readbyqxmd.com/read/28950433/effects-of-testosterone-supplementation-therapy-on-lipid-metabolism-in-hypogonadal-men-with-t2dm-a-meta-analysis-of-randomized-controlled-trials
#13
K-S Zhang, M-J Zhao, Q An, Y-F Jia, L-L Fu, J-F Xu, Y-Q Gu
Testosterone supplementation may be effective for the treatment of hypogonadism in men with type 2 diabetes mellitus (T2DM), but the evidence from randomized controlled trials (RCTs) is inconclusive. We aimed to systematically summarize results from intervention studies and assess the effects of testosterone supplementation therapy (TST) on lipid metabolism in RCTs of hypogonadal men with T2DM by meta-analysis. PubMed, Embase, and Cochrane Library databases were searched for studies reporting the effect of TST on lipid metabolism in hypogonadal men with T2DM until December 31, 2016...
September 26, 2017: Andrology
https://www.readbyqxmd.com/read/28950428/cigarette-smoking-significantly-alters-sperm-dna-methylation-patterns
#14
T G Jenkins, E R James, D F Alonso, J R Hoidal, P J Murphy, J M Hotaling, B R Cairns, D T Carrell, K I Aston
Numerous health consequences of tobacco smoke exposure have been characterized, and the effects of smoking on traditional measures of male fertility are well described. However, a growing body of data indicates that pre-conception paternal smoking also confers increased risk for a number of morbidities on offspring. The mechanism for this increased risk has not been elucidated, but it is likely mediated, at least in part, through epigenetic modifications transmitted through spermatozoa. In this study, we investigated the impact of cigarette smoke exposure on sperm DNA methylation patterns in 78 men who smoke and 78 never-smokers using the Infinium Human Methylation 450 beadchip...
September 26, 2017: Andrology
https://www.readbyqxmd.com/read/28950424/testosterone-does-not-affect-agrin-cleavage-in-mobility-limited-older-men-despite-improvement-in-physical-function
#15
T Gagliano-Jucá, T W Storer, K M Pencina, T G Travison, Z Li, G Huang, S Hettwer, P Dahinden, S Bhasin, S Basaria
In a subset of men, sarcopenia and physical dysfunction occur due to destabilization of the neuromuscular junction (NMJ), which is manifested by elevated serum concentrations of C-terminal agrin fragment (CAF). Testosterone administration improves physical function in some studies; however, its effects on serum circulating CAF concentrations remain unknown. Here we evaluate the effects of testosterone administration on circulating CAF levels in mobility-limited men with low testosterone aged 65 or older participating in the Testosterone in Older Men with Mobility Limitations (TOM) Trial...
September 26, 2017: Andrology
https://www.readbyqxmd.com/read/28941027/relationship-of-aquaporins-3-aqp3-7-aqp7-and-11-aqp11-with-boar-sperm-resilience-to-withstand-freeze-thawing-procedures
#16
N Prieto-Martínez, I Vilagran, R Morató, M M Rivera Del Álamo, J E Rodríguez-Gil, S Bonet, M Yeste
Cryopreservation is the most suitable method to preserve boar spermatozoa over long-term storage. However, freeze-thawing protocols inflict extensive damage to sperm cells, reducing their viability and compromising their fertilizing ability. In addition, high individual variability is known to exist between boar ejaculates, which may be classified as of good (GFE) or poor (PFE) freezability. While conventional spermiogram parameters fail to predict sperm cryotolerance in fresh spermatozoa, high levels of certain proteins, also known as freezability markers, have been found to be related to the sperm resilience to withstand freeze-thawing procedures...
September 21, 2017: Andrology
https://www.readbyqxmd.com/read/28859251/comparative-sperm-protein-profiling-in-bulls-differing-in-fertility-and-identification-of-phosphatidylethanolamine-binding-protein-4-a-potential-fertility-marker
#17
L Somashekar, S Selvaraju, S Parthipan, S K Patil, B K Binsila, M M Venkataswamy, S Karthik Bhat, J P Ravindra
This study aimed to identify sperm proteomic signatures regulating sperm functions and fertility by: (i) comparing the sperm electrophoretic protein profiles and identifying the differentially abundant proteins among breeding bulls differing in fertility status and (ii) elucidating the possible role of one of the identified novel proteins, PEBP4 on sperm function and fertility. The grouping of bulls as fertile (n = 6) and low fertile (n = 6) was performed based on bull fertility index and infertile (n = 6) based on semen rejection rate (>33%)...
August 31, 2017: Andrology
https://www.readbyqxmd.com/read/28853221/male-urinary-paracetamol-and-semen-quality
#18
M M Smarr, K Kannan, Z Chen, S Kim, G M Buck Louis
The endocrine-disrupting properties of paracetamol have been previously demonstrated in rodent studies of abnormal sperm morphology and diminished testosterone production, in addition to epidemiologic studies of diminished couple fecundity. In this study, we examined the relationship between paracetamol and its metabolite p-aminophenol quantified in a single spot urine and semen quality among 501 male partners of couples planning for pregnancy. Men provided a urine specimen and two fresh semen samples collected approximately one month apart and underwent 24-h analysis for 35 semen quality parameters...
August 29, 2017: Andrology
https://www.readbyqxmd.com/read/28834365/spontaneous-testicular-atrophy-occurs-despite-normal-spermatogonial-proliferation-in-a-tp53-knockout-rat
#19
M S Dai, S J Hall, M M Vantangoli Policelli, K Boekelheide, D J Spade
The tumor suppressor protein p53 (TP53) has many functions in cell cycle regulation, apoptosis, and DNA damage repair and is also involved in spermatogenesis in the mouse. To evaluate the role of p53 in spermatogenesis in the rat, we characterized testis biology in adult males of a novel p53 knockout rat (SD-Tp53(tm1sage) ). p53 knockout rats exhibited variable levels of testicular atrophy, including significantly decreased testis weights, atrophic seminiferous tubules, decreased seminiferous tubule diameter, and elevated spermatocyte TUNEL labeling rates, indicating a dysfunction in spermatogenesis...
August 22, 2017: Andrology
https://www.readbyqxmd.com/read/28805948/pathogenic-role-of-adgrg2-in-cbavd-patients-replicated-in-chinese-population
#20
B Yang, J Wang, W Zhang, H Pan, T Li, B Liu, H Li, B Wang
Congenital bilateral absence of the vas deferens (CBAVD) is an important cause of obstructive azoospermia and male infertility worldwide. Cystic fibrosis transmembrane conductance regulator (CFTR) mutations are the main pathogenic cause, although a proportion of cases are still unexplained. Recently, adhesion G protein-coupled receptor G2 (ADGRG2) gene, a novel pathogenic gene for CBAVD was identified. We did a single population replication study in Chinese CBAVD patients to replicate its role in CBAVD developing...
August 14, 2017: Andrology
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