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https://www.readbyqxmd.com/read/28927238/factor-v-leiden-is-associated-with-increased-sperm-count
#1
T E van Mens, U N Joensen, Z Bochdanovits, A Takizawa, J Peter, N Jørgensen, P B Szecsi, J C M Meijers, H Weiler, E Rajpert-De Meyts, S Repping, S Middeldorp
STUDY QUESTION: Is the thrombophilia mutation factor V Leiden (FVL) associated with an increased total sperm count? SUMMARY ANSWER: Carriers of FVL have a higher total sperm count than non-FVL-carriers, which could not be explained by genetic linkage or by observations in a FVL-mouse model. WHAT IS KNOWN ALREADY: FVL has a high prevalence in Caucasians despite detrimental health effects. Carriers have been shown to have higher fecundity, which might partly explain this evolutionary paradox...
September 12, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28903832/validation-of-modifications-to-the-ansr-for-listeria-method-for-improved-internal-positive-control-performance
#2
Susan Alles, Evan Meister, Edan Hosking, Eric Tovar, Rebecca Shaulis, Mark Schonfeld, Lei Zhang, Lin Li, Preetha Biswas, Mark Mozola, Robert Donofrio
A study was conducted to validate a minor reagent formulation change to the ANSR for Listeria method, Performance Tested Method(SM) 101202. This change involves increasing the master mix volume prelyophilization by 40% and addition of salmon sperm DNA (nontarget DNA) to the master mix. These changes improve the robustness of the internal positive control response and reduce the possibility of obtaining invalid results due to weak-positive control curves. When three foods (hot dogs, Mexican-style cheese, and cantaloupe) and sponge samples taken from a stainless steel surface were tested, no significant differences in performance between the ANSR and U...
September 14, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28854644/effect-of-irradiation-doses-on-sterility-and-biological-security-in-a-genetically-modified-strain-of-the-mediterranean-fruit-fly-diptera-tephritidae
#3
Edwin Ramírez-Santos, Pedro Rendón, Lorena Ruiz-Montoya, Jorge Toledo, Pablo Liedo
The genetically modified strain of the Mediterranean fruit fly, Ceratitis capitata (Wiedemann) VIENNA 8 1260, was developed from the genetic sexing strain VIENNA 8. It has two molecular markers that exhibit red fluorescence in the body and green fluorescence in testis and sperm. These traits offer a precise tool to discriminate between mass-reared and wild males, increasing the effectiveness of sterile insect technique. The reproductive performance of the VIENNA 8 1260 and VIENNA 8 D53- (without the D53 inversion introduced to prevent recombination) was compared at different irradiation doses...
August 1, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28853221/male-urinary-paracetamol-and-semen-quality
#4
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/28829251/challenges-in-development-of-sperm-repositories-for-biomedical-fishes-quality-control-in-small-bodied-species
#5
Leticia Torres, Yue Liu, Amy Guitreau, Huiping Yang, Terrence R Tiersch
Quality control (QC) is essential for reproducible and efficient functioning of germplasm repositories. However, many biomedical fish models present significant QC challenges due to small body sizes (<5 cm) and miniscule sperm volumes (<5 μL). Using minimal volumes of sperm, we used Zebrafish to evaluate common QC endpoints as surrogates for fertilization success along sequential steps of cryopreservation. First, concentrations of calibration bead suspensions were evaluated with a Makler(®) counting chamber by using different sample volumes and mixing methods...
August 22, 2017: Zebrafish
https://www.readbyqxmd.com/read/28805603/modern-human-sperm-freezing-effect-on-dna-chromatin-and-acrosome-integrity
#6
Tahereh Rahiminia, Akram Hosseini, Morteza Anvari, Saeed Ghasemi-Esmailabad, Ali Reza Talebi
OBJECTIVE: Presence of vitrification method in sperm freezing and the introduction of solid surface vitrification beside rapid freezing in vapour, opens an easy and safe way to help infertility centres. While the effects of cryopreservation on motility, morphology and viability of sperm are documented, the question of the probable alteration of sperm DNA, chromatin and acrosome integrity after freezing and thawing procedures in different methods is still controversial. MATERIALS AND METHODS: Normal sample were collected according to WHO strict criteria...
August 2017: Taiwanese Journal of Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28767740/cryopreservation-of-waigieu-seaperch-psammoperca-waigiensis-sperm
#7
M H Le
BACKGROUND: The cryopreservation protocols have been applied for sperm prevervation of many fish species, but have not been developed for Waigieu seaperch Psammoperca waigiensis, an important aquaculture species in Vietnam. OBJECTIVE: The objectives of this study were to find the best cryoprotectant, extender, freezing method and dilution ratio for sperm cryopreservation of Waigieu seaperch. MATERIALS AND METHODS: An effective protocol was established by comparing different cryodiluents created by mixing various cryoprotectants and extenders...
May 2017: Cryo Letters
https://www.readbyqxmd.com/read/28765035/effects-of-adding-different-levels-of-glutamine-to-modified-beltsville-extender-on-the-survival-of-frozen-rooster-semen
#8
Aytak Bakhshayesh Khiabani, Gholamali Moghaddam, Hossein Daghigh Kia
The aim of the present study was to investigate the effects of l-glutamine on the quality of frozen-thawed rooster semen. Semen samples were collected from eight mature roosters (Ross 308). After initial semen assessments, samples of adequate quality were mixed together and diluted with modified Beltsville extender without l-glutamine (control) and supplemented with 2.5, 5, and 7.5mM l-glutamine. Semen straws were subjected to cryopreservation and evaluated twice at 15-day intervals. After thawing, sperm viability, total and progressive sperm motilities were measured by Eosin-Nigrosine and Computer-Aided Sperm Analysis (CASA), respectively...
July 25, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28764714/testis-specific-histone-2b-is-associated-with-sperm-chromatin-dynamics-and-bull-fertility-a-pilot-study
#9
Naseer A Kutchy, Ana Velho, Erika S B Menezes, Marie Jacobsen, Giselle Thibaudeau, Robert W Wills, Arlindo Moura, Abdullah Kaya, Andy Perkins, Erdogan Memili
BACKGROUND: Bull fertility is the degree of sperm's ability to fertilize and activate the egg and support embryo development, and this is critical for herd reproductive performance. We used the bull as a unique model organism for the study of male fertility because cattle genetics and physiology is similar to those of other mammals including humans. Moreover, reliable fertility data along with well-established in vitro systems are available for bovine. The objective of this original study was to ascertain evolutionary diversification and expression dynamics of Testis Specific Histone 2B (TH2B) in sperm from Holstein bulls with different fertility scores...
August 1, 2017: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/28739435/ureaplasma-spp-in-male-infertility-and-its-relationship-with-semen-quality-and-seminal-plasma-components
#10
Yun Heng Zhou, Hong Xia Ma, Xiao Xing Shi, Yang Liu
OBJECTIVE: We investigated the prevalence of Ureaplasma spp. in semen samples of infertile men in Shanghai, China and evaluated the correlation between the sperm parameters (seminal volume, sperm concentration, progressive motility and non-progressive) and the secretary function in these infectious populations. METHODS: Semens were collected from 540 infertile men and 260 fertile control group in shanghai, China and subjected to standard bacterial and Ureaplasma spp...
June 22, 2017: Journal of Microbiology, Immunology, and Infection, Wei Mian Yu Gan Ran za Zhi
https://www.readbyqxmd.com/read/28725387/origins-of-two-hemiclonal-hybrids-among-three-hexagrammos-species-teleostei-hexagrammidae-genetic-diversification-through-host-switching
#11
Hiroyuki Munehara, Miho Horita, Motoko R Kimura-Kawaguchi, Aya Yamazaki
Two natural, hemiclonal hybrid strains were discovered in three Hexagrammos species. The natural hybrids, all of which were females that produced haploid eggs containing only the Hexagrammos octogrammus genome (maternal ancestor; hereafter Hoc), generated F1 hybrid-type offspring by fertilization with haploid sperm of Hexagrammos agrammus or Hexagrammos otakii (paternal species; Hag and Hot, respectively). This study was performed to clarify the extent of diversification between the two hybrids and the maternal ancestor...
October 2016: Ecology and Evolution
https://www.readbyqxmd.com/read/28724183/physiological-intra-cytoplasmic-sperm-injection-picsi-outcomes-after-oral-pretreatment-and-semen-incubation-with-myo-inositol-in-oligoasthenoteratozoospermic-men-results-from-a-prospective-randomized-controlled-trial
#12
T Korosi, C Barta, K Rokob, T Torok
OBJECTIVE: The aim of the current study was to evaluate the effect of an oral pretreatment with a mix of myo-inositol (Myo-Ins), folic acid, vitamin E, L-carnitine, L-arginine and selenium (Folandrol, Exeltis, Hungary) and subsequent direct Myo-Ins incubation of spermatozoa before Physiological Intra-Cytoplasmic Sperm Injection (PICSI) procedures in infertile couples due to oligoasthenoteratozoospermia with previous failed PICSI procedures. PATIENTS AND METHODS: We performed a prospective, randomized controlled trial at the Assisted Reproduction Unit of the Kaáli Institute (Győr, Hungary)...
June 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28712886/impacts-of-abstinence-time-on-semen-parameters-in-a-large-population-based-cohort-of-subfertile-men
#13
Sorena Keihani, James R Craig, Chong Zhang, Angela P Presson, Jeremy B Myers, William O Brant, Kenneth I Aston, Benjamin R Emery, Timothy G Jenkins, Douglas T Carrell, James M Hotaling
OBJECTIVES: To assess the effects of abstinence time on semen parameters in normozoospermic and oligozoospermic men using a large cohort of subfertile men. PATIENTS AND METHODS: From 2002-2013, we retrospectively reviewed data from 15623 patients seen at our fertility clinic. Data on patient age and semen parameters were extracted along with abstinence time. Abstinence time was categorized into 4 groups (≤2 days; >2 & ≤5 days; >5 & ≤7 days; >7 days)...
July 13, 2017: Urology
https://www.readbyqxmd.com/read/28707057/application-of-testosterone-supplementation-in-semen-to-improve-sperm-motility-in-asthenozoospermic-males
#14
Isarin Thanaboonyawat, Panicha Chantrapanichkul, Somsin Petyim, Chidchanok Kaewjunun, Pitak Laokirkkiat, Roungsin Choavaratana
PURPOSE: To evaluate the effect of different concentrations and durations of seminal testosterone supplementation upon the motility of sperm from asthenozoospermic males. METHODS: Semen was collected from 41 infertile men with asthenozoospermia. After liquefaction, 200 μL was extracted from each semen sample and divided equally into five groups for a negative control, a vehicle control, and three experimental portions mixed with 4.75, 7.75, and 17.75 nmol/L of testosterone, respectively...
July 13, 2017: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/28612309/pre-implantation-genetic-diagnosis-should-we-use-icsi-for-all
#15
Baruch Feldman, Adva Aizer, Masha Brengauz, Keren Dotan, Jacob Levron, Eyal Schiff, Raoul Orvieto
OBJECTIVE: Intracytoplasmic sperm injection (ICSI) is commonly used during pre-implantation genetic diagnosis (PGD) in vitro fertilization (IVF), aiming to eliminate the risk of contamination from extraneous sperm DNA. Recently, ICSI "overuse" in non-male infertility has been doubted, since it does not offer an advantage over IVF. Prompted by the aforementioned observations, we sought to assess the accuracy of IVF vs ICSI in PGD cases, as might be reflected by a difference in the prevalence of discarded embryos as a consequent of parental contamination...
June 13, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28583596/sperm-maturation-in-sturgeon-actinopterygii-acipenseriformes-a-review
#16
REVIEW
Borys Dzyuba, Jacky Cosson, Viktoriya Dzyuba, Pavlo Fedorov, Olga Bondarenko, Marek Rodina, Otomar Linhart, William L Shelton, Sergii Boryshpolets
The morphology of the reproductive system of acipenseriform fishes is quite different from that of teleostean species, but an associated unique physiological difference in male sturgeons was not discovered until recently; sperm of sturgeons passes through the kidneys then via Wolffian ducts into the environment rather that emptying directly through seminal ducts. The mixing of sperm with excretory products has been found to be a requisite for the capacity to be activated (maturation step) instead of being deleterious...
July 15, 2017: Theriogenology
https://www.readbyqxmd.com/read/28576677/impact-of-different-dilution-techniques-on-boar-sperm-quality-and-sperm-distribution-of-the-extended-ejaculate
#17
M Schulze, C Ammon, J Schaefer, A-M Luther, M Jung, D Waberski
The dilution of ejaculates is a fundamental step for the production of liquid-preserved boar semen. For a long time, it has been recommended to add the extender to the ejaculate. The aim of the present study was to first compare the effect of the position ('center' vs. 'wall') where the extender is added to the semen-mixing cylinder (height 32.5cm; diameter 12.7cm) using an automatic dispenser (n=11). In experiment 2 (n=30), we analyzed the two main dilution methods (extender to the semen ('control') vs. 'reverse')...
May 29, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28576621/chelating-agents-in-combination-with-rosmarinic-acid-for-boar-sperm-freeze-drying
#18
Maite Olaciregui, Victoria Luño, Noelia González, Paula Domingo, Ignacio de Blas, Lydia Gil
The presence of DNA protective agents in the medium is necessary to maintain sperm functionality after freeze-drying procedure. The objective of this study was to investigate the effect of chelating agents, ethylene diaminetetraacetic acid (EDTA) and ethylene glycoltetraacetic acid (EGTA), in combination with rosmarinic acid (RA) on DNA integrity of freeze-dried boar sperm. We also examined the effect of these agents on the in vitro developmental ability of porcine oocytes following sperm injection (ICSI). Heterospermic mix, obtained from ejaculated sperm of three boars, was freeze-dried in two different chelating agents' media: 50mM EDTA or 50mM EGTA, and in these media supplemented with 105μM of rosmarinic acid...
September 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28574374/nitrophorins-and-nitrobindins-structure-and-function
#19
REVIEW
Giovanna De Simone, Paolo Ascenzi, Alessandra di Masi, Fabio Polticelli
Classical all α-helical globins are present in all living organisms and are ordered in three lineages: (i) flavohemoglobins and single domain globins, (ii) protoglobins and globin coupled sensors and (iii) truncated hemoglobins, displaying the 3/3 or the 2/2 all α-helical fold. However, over the last two decades, all β-barrel and mixed α-helical-β-barrel heme-proteins displaying heme-based functional properties (e.g. ligand binding, transport and sensing) closely similar to those of all α-helical globins have been reported...
May 24, 2017: Biomolecular Concepts
https://www.readbyqxmd.com/read/28541460/seminal-plasma-pro-inflammatory-cytokines-interferon-%C3%AE-ifng-and-c-x-c-motif-chemokine-ligand-8-cxcl8-fluctuate-over-time-within-men
#20
David J Sharkey, Kelton P Tremellen, Nancy E Briggs, Gustaaf A Dekker, Sarah A Robertson
STUDY QUESTION: Do seminal plasma pro-inflammatory cytokines interferon-γ (IFNG) and C-X-C motif chemokine ligand 8 (CXCL8) vary within individual men over time? SUMMARY ANSWER: IFNG exhibits substantial variation that is independent of duration of abstinence but correlates with lipopolysaccharide (LPS) content, while CXCL8 varies moderately in association with duration of abstinence. WHAT IS KNOWN ALREADY: Pro-inflammatory cytokines IFNG and CXCL8 in seminal fluid can adversely impact male and female fertility...
May 25, 2017: Human Reproduction
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