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https://www.readbyqxmd.com/read/29774482/the-effect-of-subclinical-varicocele-on-pregnancy-rates-and-semen-parameters-a-systematic-review-and-meta-analysis
#1
REVIEW
Taylor P Kohn, Samuel J Ohlander, Jake S Jacob, Tina M Griffin, Larry I Lipshultz, Alexander W Pastuszak
PURPOSE OF REVIEW: Current guidelines recommend against surgical repair of subclinical varicoceles (SCVs) for infertility; several studies demonstrate mixed fertility results after SCV correction. To determine whether surgical correction of SCV improves semen parameters and/or reproductive outcomes, we performed a systematic review and meta-analysis. Seven biomedical literature databases were searched through January 2018 for studies that assessed reproductive outcomes and/or change in semen parameters in men with corrected SCV compared to either (1) uncorrected SCV or (2) corrected clinical varicocele...
May 17, 2018: Current Urology Reports
https://www.readbyqxmd.com/read/29739653/the-association-between-urinary-concentrations-of-phosphorous-containing-flame-retardant-metabolites-and-semen-parameters-among-men-from-a-fertility-clinic
#2
Mary E Ingle, Lidia Mínguez-Alarcón, Courtney C Carignan, Craig M Butt, Heather M Stapleton, Paige L Williams, Jennifer B Ford, Russ Hauser, John D Meeker
BACKGROUND: The use of PFRs has steadily increased as brominated compounds have been or are being phased out. Human exposure is widespread and animal studies have shown adverse impacts on male reproduction, but human data are lacking. OBJECTIVE: To study the associations between urinary concentrations of phosphorous-containing flame retardant (PFR) metabolites and semen parameters. METHODS: A subset of 220 men from an existing longitudinal cohort of couples were recruited from Massachusetts General Hospital fertility clinic between 2005 and 2015...
May 2, 2018: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/29708294/combined-effect-of-apigenin-and-ferulic-acid-on-frozen-thawed-boar-sperm-quality
#3
Yifei Pei, Li Yang, Lin Wu, Huanshan He, Guoxia Geng, Dejun Xu, Huali Chen, Qingwang Li
The main aim of the present study was to evaluate the cryoprotective effect of apigenin (AP) and ferulic acid (FA) on boar sperm during cryopreservation. AP and FA were both demonstrated to be high-efficiency antioxidants and had not previously been used to protect sperm from cryodamage. As boar sperm is sensitive to oxidative stress, suitable antioxidants are still needed for improving frozen-thawed sperm quality. With this purpose, semen samples coming from five boars were used in this study. Ejaculates of five boars were mixed and split into 16 aliquots, in which different doses of AP and FA were added separately or together...
April 30, 2018: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/29648649/infectious-inflammatory-and-autoimmune-male-factor-infertility-how-do-rodent-models-inform-clinical-practice
#4
Monika Fijak, Adrian Pilatz, Mark P Hedger, Nour Nicolas, Sudhanshu Bhushan, Vera Michel, Kenneth S K Tung, Hans-Christian Schuppe, Andreas Meinhardt
BACKGROUND: Infection and inflammation of the reproductive tract are significant causes of male factor infertility. Ascending infections caused by sexually transmitted bacteria or urinary tract pathogens represent the most frequent aetiology of epididymo-orchitis, but viral, haematogenous dissemination is also a contributory factor. Limitations in adequate diagnosis and therapy reflect an obvious need for further understanding of human epididymal and testicular immunopathologies and their contribution to infertility...
April 10, 2018: Human Reproduction Update
https://www.readbyqxmd.com/read/29628020/casa-in-invertebrates
#5
Gerhard van der Horst, Monique Bennett, John D D Bishop
Sperm movement has been described in several phyla of invertebrates. Yet, sperm motility has only been quantified using computer-aided sperm analysis (CASA-Mot) in externally fertilising species (broadcast spawners) of two phyla, molluscs and echinoderms. In the present study we quantified in detail the nature of the sperm tracks, percentage motility groupings and detailed kinematics of rapid-, medium- and slow-swimming spermatozoa in the oyster Crassostrea gigas and four species never previously studied by CASA-Mot, namely the molluscs Choromytilus meridionalis, Donax serra and Haliotis midae and the echinoderm Parechinus angulosus...
April 9, 2018: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/29622351/proteomics-a-valuable-approach-to-elucidate-spermatozoa-post-testicular-maturation-in-the-endangered-acipenseridae-family
#6
REVIEW
Pietro Boccaletto, Mohammad Abdul Momin Siddique, Jacky Cosson
Proteomics techniques, such as two-dimensional polyacrylamide gel electrophoresis, mass spectrometry, and differential gel electrophoresis, have been extensively used to describe the protein composition of male gametes in different animals, mainly mammals. They have also provided a deeper understanding of protein functions involved in sperm processes, as in processes that in humans lead to male infertility. However, few studies focus on fish sperm proteomics and even fewer have tried to explore the proteomic profile of Sturgeon spermatozoa...
March 31, 2018: Animal Reproduction Science
https://www.readbyqxmd.com/read/29620421/adding-bovine-seminal-plasma-prior-to-freezing-improves-post-thaw-bull-sperm-kinematics-but-decreases-mitochondrial-activity
#7
Thanapol Nongbua, Essraa M Al-Essawe, Anders Edman, Anders Johannisson, Jane M Morrell
Variations in fertility between bulls with comparable sperm quality could be due to differences in their seminal plasma (SP). The aim of this study was to investigate the effect of adding bovine SP from bulls of known fertility to SP-free sperm samples. After removal of SP by Single Layer Centrifugation, resuspended sperm pellets were treated with SP from high or low fertility bulls at 0% (control), 1%, or 5% before freezing. Sperm quality was evaluated after thawing. Data were analyzed using Proc MIXED, SAS®...
April 5, 2018: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29595063/3-monochloropropane-1-2-diol-alpha-chlorohydrin-disrupts-spermatogenesis-and-causes-spermatotoxicity-in-males-of-the-egyptian-fruit-bat-rousettus-aegyptiacus
#8
Y I Mahmoud, A Taha, S Soliman
We evaluated the sterilizing effect of 3-monochloropropane-1, 2-diol (3-MCPD) in male Egyptian fruit bats (Rousettus aegyptiacus). We used three groups. One was treated with 70 mg/kg 3-MCPD for 4 days. The second group was treated with 3-MCPD as a bait formulation (known concentration of 3-MCPD mixed with a known amount of food). The third group was untreated controls. We compared the weights of the reproductive organs, histology of the testes, occurrence of spermatogenesis, and the count, motility and abnormalities of epididymal sperm of treated males with those of the untreated control group...
March 29, 2018: Biotechnic & Histochemistry: Official Publication of the Biological Stain Commission
https://www.readbyqxmd.com/read/29566664/rival-seminal-fluid-induces-enhanced-sperm-motility-in-a-polyandrous-ant
#9
Joanito Liberti, Boris Baer, Jacobus J Boomsma
BACKGROUND: Promiscuous mating and sperm competition often induce arms races between the sexes with detrimental outcomes for females. However, ants with multiply-inseminated queens have only a single time-window for sperm competition and queens are predicted to gain control over the outcome of sperm storage quickly. The seminal fluid of Acromyrmex leaf-cutting ants reduces the viability of rival sperm, but how confrontations between unrelated ejaculates affect sperm storage remains unknown...
March 23, 2018: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/29552399/real-time-halo-correction-in-phase-contrast-imaging
#10
Mikhail E Kandel, Michael Fanous, Catherine Best-Popescu, Gabriel Popescu
As a label-free, nondestructive method, phase contrast is by far the most popular microscopy technique for routine inspection of cell cultures. However, features of interest such as extensions near cell bodies are often obscured by a glow, which came to be known as the halo . Advances in modeling image formation have shown that this artifact is due to the limited spatial coherence of the illumination. Nevertheless, the same incoherent illumination is responsible for superior sensitivity to fine details in the phase contrast geometry...
February 1, 2018: Biomedical Optics Express
https://www.readbyqxmd.com/read/29545517/sperm-activation-through-orbital-and-self-axis-revolutions-using-an-artificial-cilia-embedded-serpentine-microfluidic-platform
#11
Bivas Panigrahi, Chang-Hung Lu, Neha Ghayal, Chia-Yuan Chen
The zebrafish sperm activation profoundly depends upon the homogeneous mixing of the sperm cells with its diluent in a quick succession as it alters the cell's extracellular medium and initiates their motility. Manual stirring, the traditional method for zebrafish sperm activation is tedious, time-consuming, and has a poor outcome. In this aspect, an artificial cilia embedded serpentine microfluidic is designed through which hydrodynamic factors of the microfluidic environment can be precisely regulated to harness uniform mixing, hence ensuring a superior sperm activation...
March 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29540057/membrane-restructuring-events-during-the-enzymatic-generation-of-ceramides-with-very-long-chain-polyunsaturated-fatty-acids
#12
Daniel Alejandro Peñalva, Silvia Antollini, Ernesto Ambroggio, Marta I Aveldaño, Maria Laura Fanani
In rat sperm head, sphingomyelin (SM) species that contain very long chain PUFA (V-SM) become ceramides (V-Cer) after inducing in vitro the acrosomal reaction. The reason for such a specific location of this conversion, catalysed by a sphingomyelinase (SMase), has received little investigation so far. Here, the effects of SMase were compared in unilamellar vesicles (LUVs, GUVs) containing phosphatidylcholine and either V-SM or a palmitate-rich SM (P-SM). In uniformly sized LUVs at 37 °C, more V-Cer was generated, and more rapidly, than P-Cer...
March 15, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29496343/semen-evaluation-and-in-vivo-fertility-in-a-northern-italian-pig-farm-can-advanced-statistical-approaches-compensate-for-low-sample-size-an-observational-study
#13
Alberto Elmi, Federico Banchelli, Francesca Barone, Paolo Fantinati, Domenico Ventrella, Monica Forni, Maria Laura Bacci
The evaluation of sperm functionality and morphology allows discerning between high and low quality ejaculates, but does not give detailed predictive information regarding in vivo fertility. The current developments in statistical modeling have helped in carrying out reproductive studies, but their biggest limitation is in the size of the dataset to be used. The aim of the present observational study was to evaluate whether advanced statistical approaches, such as mixed effects regression models and bootstrap resampling, can help in assessing the predictive ability of semen parameters in terms of in vivo fertility (farrowing rate and litter size), on a small/medium farm with a limited number of animals...
May 2018: Animal Reproduction Science
https://www.readbyqxmd.com/read/29486732/whole-genome-scan-reveals-significant-non-additive-effects-for-sire-conception-rate-in-holstein-cattle
#14
Paula Nicolini, Rocío Amorín, Yi Han, Francisco Peñagaricano
BACKGROUND: Service sire has a considerable impact on reproductive success in dairy cattle. Most gene mapping studies for bull fertility have focused on additive effects, while non-additive effects have been largely ignored. The main goal of this study was to assess the relevance of non-additive effects on Sire Conception Rate (SCR) in Holstein dairy cattle. The analysis included 7.5 k Holstein bulls with both SCR records and 57.8 k single nucleotide polymorphism (SNP) markers spanning the entire genome...
February 27, 2018: BMC Genetics
https://www.readbyqxmd.com/read/29481619/influence-of-the-genetic-background-on-the-reproductive-phenotype-of-mice-lacking-cysteine-rich-secretory-protein-1-crisp1
#15
Mariana Weigel Muñoz, A María Battistone, Guillermo Carvajal, Julieta A Maldera, Ludmila Curci, Pablo Torres, Daniel Lombardo, Omar P Pignataro, Vanina G Da Ros, Patricia S Cuasnicu
Epididymal sperm protein CRISP1 has the ability to both regulate murine CatSper, a key sperm calcium channel, and interact with egg-binding sites during fertilization. In spite of its relevance for sperm function, Crisp1-/- mice are fertile. Considering that phenotypes can be influenced by the genetic background, in the present work mice from the original mixed Crisp1-/- colony (129/SvEv*C57BL/6) were backcrossed onto the C57BL/6 strain for subsequent analysis of their reproductive phenotype. Whereas fertility and fertilization rates of C57BL/6 Crisp1-/- males did not differ from those reported for mice from the mixed background, several sperm functional parameters were clearly affected by the genetic background...
February 22, 2018: Biology of Reproduction
https://www.readbyqxmd.com/read/29474822/male-urinary-biomarkers-of-antimicrobial-exposure-and-bi-directional-associations-with-semen-quality-parameters
#16
Melissa M Smarr, Masato Honda, Kurunthachalam Kannan, Zhen Chen, Sungduk Kim, Germaine M Buck Louis
Antimicrobials including parabens, triclosan, and triclocarban have endocrine disrupting properties. Among 501 male partners of couples planning to become pregnant, preconception urinary biomarkers of parabens, triclosan and triclocarban exposure were quantified in spot urine samples. Men also provided two fresh semen samples collected approximately one month to undergo 24-h semen quality analysis. Linear mixed-effects models, adjusted for creatinine, race, age and body mass index, were utilized to assess the relationship between log transformed chemical concentrations rescaled by their standard deviations and semen parameters...
April 2018: Reproductive Toxicology
https://www.readbyqxmd.com/read/29448494/photocatalytic-degradation-of-oxytetracycline-by-ternary-mixed-catalyst-and-toxicity-assessment-using-boar-sperm
#17
Kefu Zhou, Xiao-Dan Xie, Xin-Yan Hu, Ming-Cheng Chen, Chang-Tang Chang
Response surface methodology was adopted to obtain ternary mixed catalysts of TiO2-loaded ZSM-5 zeolite and graphene. Oxytetracycline was used as challenged toxicant to evaluate the photocatalytic degradation efficiency of the composites. The optimal weight ratio of graphene, TiO2, and ZSM-5 was 1:8:1. The composites were characterized by ultraviolet-visible spectroscopy, X-ray diffraction, fourier transform infrared, N2 adsorption-desorption isotherms, and transmission electron microscope with an energy-dispersive spectroscopy system, etc...
February 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29383772/effects-of-two-freezing-methods-and-two-cryopreservation-media-on-post-thaw-quality-of-stallion-spermatozoa
#18
S Macedo, M Bliebernicht, J Carvalheira, A Costa, F Ribeiro, A Rocha
Glycerol-based extenders are widely utilized for freezing equine semen, but media combining methylformamide may better preserve sperm motility and mitochondrial function. Semen is cryopreserved utilizing either a Styrofoam box filled with liquid nitrogen or an automatic freezer. The objective of this experiment was to compare the post-thaw characteristics of the same ejaculates cryopreserved in a Styrofoam box or in an automatic freezer, utilizing a glycerol-based extender (Gent) and an extender that combines methylformamide and glycerol (BotuCrio® )...
April 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29355519/successful-sperm-cryopreservation-of-the-brown-marbled-grouper-epinephelus-fuscoguttatus-using-propylene-glycol-as-cryoprotectant
#19
Maisarah Yusoff, Badrul Nizam Hassan, Muhd Ikhwanuddin, Shahreza Md Sheriff, Fatimah Hashim, Sufian Mustafa, Ivan Chong Chu Koh
This study developed the cryopreservation of brown-marbled grouper spermatozoa for practical application. We examined 32 cryodiluents, developed from four types of cryoprotectants [propylene glycol (PG), dimethyl-sulphoxide (Me2 SO), dimethyl-acetamide (DMA) and ethylene glycol (EG)] at four concentrations of 5, 10, 15 and 20% in combination with two extenders [Fetal bovine serum (FBS) and artificial seminal plasma (ASP). Cooling rates were examined by adjusting the height of straws (2.5-12.5 cm) from the liquid nitrogen (LN) vapor and cooled for 5 min before immersion into LN...
January 30, 2018: Cryobiology
https://www.readbyqxmd.com/read/29352487/disaccharide-combinations-and-the-expression-of-enolase3-and-plasma-membrane-ca-2-atpase-isoform-in-sturgeon-sperm-cryopreservation
#20
M D Xi, P Li, H Du, X M Qiao, Z G Liu, Q W Wei
Acipenser sinensis and Acipenser dabryanus are critically endangered species, so germplasm conservation via cryopreservation of sperm is necessary. Disaccharides can act as membrane-impermeable cryoprotectants, and enolase3 (ENO3) and plasma membrane Ca2+ ATPase isoform (PMCA2) are proteins associated with sperm quality. We considered seven characteristics of sperm quality in cultured brood stock from A. sinensis and A. dabryanus. We tested use of sucrose or trehalose alone and in combination at different concentrations for cryopreservation of A...
April 2018: Reproduction in Domestic Animals, Zuchthygiene
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