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https://www.readbyqxmd.com/read/29334412/stallion-semen-quality-depends-on-mhc-matching-to-teaser-mare
#1
E Jeannerat, E Marti, C Berney, F Janett, H Bollwein, H Sieme, D Burger, C Wedekind
The major histocompatibility complex (MHC) has repeatedly been found to influence mate choice of vertebrates, with MHC-dissimilar mates typically being preferred over MHC-similar mates. We used horses (Equus caballus) to test whether MHC matching also affects male investment into ejaculates after short exposure to a female. Semen characteristics varied much among stallions. Controlling for this variance with a full-factorial within-subject experimental design, we found that a short exposure to an MHC-dissimilar mare enhanced male plasma testosterone and led to ejaculates with elevated sperm numbers as compared to exposure to an MHC-similar mare...
January 15, 2018: Molecular Ecology
https://www.readbyqxmd.com/read/29333877/what-behaviors-do-young-heterosexual-australians-see-in-pornography-a-cross-sectional-study
#2
Angela C Davis, Elise R Carrotte, Margaret E Hellard, Megan S C Lim
This study investigated how frequently a group of young heterosexual Australians (ages 15 to 29) saw a range of behaviors represented in pornography over the previous 12 months. Participants were recruited to an anonymous online survey. Those who reported having viewed pornography in the past 12 months (n = 517) indicated how frequently they saw each of a list of 17 behaviors when they watched pornography in the past 12 months. Men's pleasure (83%) was seen frequently by the highest proportion of young people surveyed, followed by a man being portrayed as dominant (70%)...
January 15, 2018: Journal of Sex Research
https://www.readbyqxmd.com/read/29333626/effect-of-astaxanthin-on-the-quality-of-boar-sperm-stored-at-17%C3%A2-c-incubated-at-37%C3%A2-c-or-under-in-vitro-conditions
#3
A Basioura, C M Boscos, I Parrilla, G Tsousis, I A Tsakmakidis
The aim of the study was to investigate the effect of the antioxidant astaxanthin on boar semen. Twenty ejaculates from 10 boars (two ejaculates/boar) were extended and split in three groups: semen control (SC), solvent control (C; semen with dimethyl sulfoxide, the diluent of astaxanthin) and semen with astaxanthin (A) in concentration 0.5 μmol/L. Sperm quality parameters (motility and kinetics, morphology, viability, functional integrity of sperm plasma membrane by Hypo-Osmotic Swelling Test [HOST] and DNA integrity) were assessed at 0, 24 and 48 hr of storage at 17°C (experiment I), before (0 hr) and after (1 hr) of sperm thermal resistance assay at 37°C (experiment II) and finally before (0 hr) and after (1 hr) sperm in vitro incubation (38...
January 14, 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29325880/cryoprotective-effect-of-glutamine-taurine-and-proline-on-post-thaw-semen-quality-and-dna-integrity-of-donkey-spermatozoa
#4
M Bottrel, D Acha, I Ortiz, M Hidalgo, J Gósalvez, J Camisão, J Dorado
This study was conducted to evaluate the effect of amino acid addition to semen on post-thaw quality of donkey spermatozoa. Eighteen ejaculates were pooled and divided into aliquots which were cryopreserved in Gent A® containing 1% ethylene glycol (Gent-EG) and supplemented with 0 (as control), 20, 40, or 60 mM of glutamine, proline, or taurine. The greatest concentration (60 mM) of glutamine and taurine resulted in greater (P < 0.001) post-thaw sperm motility. Amino acid supplementation did not improve (P > 0...
December 30, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/29325456/dual-purpose-vardenafil-hydrochloride-dapoxetine-hydrochloride-orodispersible-tablets-in-vitro-formulation-evaluation-stability-study-and-in-vivo-comparative-pharmacokinetic-study-in-healthy-human-subjects
#5
Khaled El-Refaie, Mahmoud H Teaima, Mohamed A El-Nabarawi
Erectile Dysfunction (ED) is the most important disorder after premature ejaculation for sexual activity in men. Vardenafil Hydrochloride (VH) is an oral therapy for the treatment of erectile dysfunction. VH oral disintegrating tablets (ODTs) have been prepared by freeze drying technique to improve its dissolution profile and the overall clinical performance. Dapoxetine Hydrochloride (DH) was added to the best three formulae of the prepared VH ODTs to treat premature ejaculation. All the ODTs formulae were evaluated for weight variation, friability, drug content, in-vitro disintegration time, wetting time, and the dissolution study...
January 11, 2018: Drug Development and Industrial Pharmacy
https://www.readbyqxmd.com/read/29313750/serum-retinol-folic-acid-and-copper-are-associated-with-sperm-abnormalities-in-men-with-obesity
#6
Berniza Calderón, Vital Hevia, Belén Vega-Piñero, Antonia Martín-Hidalgo, Helena Mendez-Del Sol, Héctor F Escobar-Morreale, José I Botella-Carretero
BACKGROUND AND OBJECTIVES: Micronutrients may influence the development and differentiation of sperm cells. The aim of this study was to assess the possible association of deficiencies in several vitamins and trace elements with sperm abnormalities in men with obesity. PARTICIPANTS AND METHODS: Thirty male patients with moderate to severe obesity and ten lean controls who gave written informed consent were included. Anthropometric parameters were recorded. Hormonal and lipid profiles were analyzed, as well as serum concentrations of zinc, copper, retinol, α-tocopherol, 25-hydroxyvitamin D, cobalamin, and folic acid...
January 9, 2018: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/29312842/bladder-neck-collagen-injection-in-the-treatment-of-congenital-retrograde-ejaculation-a-case-report
#7
Basri Cakiroglu, Orhun Sinanoglu, Ersan Arda
The present study describes the first successful treatment of a congenital retrograde ejaculation case with a submucosal collagen injection to the bladder neck. A 28-year-old male (height 170 cm, weight 80 kg) attended to the urology outpatient clinic with complaints of scattered urine stream and absence of ejaculation. The laboratory tests, including hormone profile (follicle stimulating hormone, luteinizing hormone, and testosterone) and the routine blood count were within normal ranges, whereas semen analysis demonstrated a total absence of ejaculation...
November 3, 2017: Curēus
https://www.readbyqxmd.com/read/29307732/promescent%C3%A2-has-a-cytotoxic-impact-on-fresh-human-sperm-in-vitro
#8
Melissa Sutton, Caitlin Hunn, Roxanne B Summers-Colquitt, Shu-Hung Chen, Shahryar K Kavoussi, Keikhosrow M Kavoussi, Parviz K Kavoussi
OBJECTIVES: To assess the impact of Promescent®, a commonly used topical medication for premature ejaculation (PE), on human sperm motility, forward progression (FP), viability, and sperm DNA fragmentation (SDF) in vitro. METHODS: Aliquots from specimens for diagnostic semen analyses from patients (n=20) presenting to a couple's fertility center andrology laboratory for fertility testing were included after the full diagnostic semen analyses were performed. Samples which met the World Health Organization (WHO) 5th edition criteria as "normal" had Promescent® applied to an aliquot of the sample and motility, FP, viability, and SDF were compared to an aliquot which was not treated with Promescent®...
January 4, 2018: Urology
https://www.readbyqxmd.com/read/29304248/viable-acrosome-intact-human-spermatozoa-in-the-ejaculate-as-a-marker-of-semen-quality-and-fertility-status
#9
Dorte Louise Egeberg Palme, Anders Rehfeld, Anne Kirstine Bang, Kristiana Alexandrova Nikolova, Søren Kjærulff, Morten Rønn Petersen, Janni Vikkelsø Jeppesen, Martin Glensbjerg, Anders Juul, Niels E Skakkebæk, Søren Ziebe, Niels Jørgensen, Kristian Almstrup
STUDY QUESTION: Is it possible, in an unbiased and clinical relevant way, to determine the number of viable acrosome-intact human spermatozoa in ejaculates and to use this as a measure of fertility chances? SUMMARY ANSWER: Image cytometry enables easy and unbiased quantification of viable acrosome-intact spermatozoa and it correlates with semen quality and fertility status. WHAT IS KNOWN ALREADY: The presence of the acrosome and its ability to respond to physiological inducers (e...
January 2, 2018: Human Reproduction
https://www.readbyqxmd.com/read/29301674/influence-of-cooling-temperature-in-sperm-subpopulations-of-domestic-cats
#10
REVIEW
Anne Kemmer Souza, Luiz Guilherme Corsi Trautwein, Cristiane Sella Paranzini, Felipe Montanheiro Perencin, Guilherme Schiess Cardoso, Maria Isabel Mello Martins
The objective of this study was to identify and compare domestic feline sperm subpopulations, chilled at -1 °C for 24 and 48 h, as well as to analyze the sperm frequency in different subpopulations. Ten adult cats were used. Sperm collection was performed using electroejaculation (EEJ). Spermatic kinetics were evaluated using a computerized system at three moments: fresh, 24 and 48 h after refrigeration. The ejaculates were divided into a group refrigerated at -1 °C (n = 5,) and a group refrigerated at 4 °C (n = 5),...
December 22, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/29299903/delayed-ejaculation-pathophysiology-diagnosis-and-treatment
#11
REVIEW
Ibrahim A Abdel-Hamid, Omar I Ali
Delayed ejaculation (DE) is a poorly defined and uncommon form of male sexual dysfunction, characterized by a marked delay in ejaculation or an inability to achieve ejaculation. It is often quite concerning to patients and their partners, and sometimes frustrates couples' attempts to conceive. This article aims to review the pathophysiology of DE and anejaculation (AE), to explore our current understanding of the diagnosis, and to present the treatment options for this condition. Electronic databases were searched from 1966 to October 2017, including PubMed (MEDLINE) and Embase...
January 2018: World Journal of Men's Health
https://www.readbyqxmd.com/read/29290084/a-systematic-review-evaluating-the-effect-of-vitamin-b6-on-semen-quality
#12
Saleem Ali Banihani
PURPOSE: This review systematically discusses and summarizes the effect of vitamin B6 on semen quality. MATERIAL AND METHOD: To achieve this contribution, we searched the PubMed, Scopus, and Web of Science databases for English language papers from 1984 through 2017 using the key words "sperm" versus "Vitamin B6", "pyridoxine", and "pyridoxal". Also, the references from selected published papers were included, only if relevant. RESULT: To date, as revealed by rodent studies, high doses of vitamin B6 impair semen quality and sperm parameters...
December 30, 2017: Urology Journal
https://www.readbyqxmd.com/read/29289614/sexual-odor-preference-and-dopamine-release-in-the-nucleus-accumbens-by-estrous-olfactory-cues-in-sexually-na%C3%A3-ve-and-experienced-male-rats
#13
Masaya Fujiwara, Atsuhiko Chiba
Sexual behavior is a natural reward that activates mesolimbic dopaminergic system. Microdialysis studies have shown that extracellular level of dopamine (DA) in the nucleus accumbens (NAcc) significantly increases during copulation in male rats. The NAcc DA level is also known to be increased during the presentation of a sexually receptive female before mating. This rise in DA was probably associated with sexual motivation elicited by incentive stimuli from the receptive female. These microdialysis studies, however, did not thoroughly investigated if olfactory stimuli from estrous females could significantly increase the extracellular DA in the NAcc of male rats...
December 28, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/29287895/a-two-step-dilution-tris-egg-yolk-extender-containing-equex-stm-significantly-improves-sperm-cryopreservation-in-the-african-wild-dog-lycaon-pictus
#14
Femke Van den Berghe, Monique Christina Johanna Paris, Michael Brent Briggs, Wenche Kristin Farstad, Damien Boyd Bertrand Paul Paris
Conservation management of endangered African wild dogs (AWD; Lycaon pictus) can benefit greatly from development of sperm freezing and artificial insemination. Previous freezing attempts yielded nearly 0% motile sperm within 2 h of thawing. In this study, two canine freezing protocols were tested: Protocol 1: a one-step dilution in TRIS-20% egg yolk containing 8% glycerol; and Protocol 2: a two-step dilution in TRIS-20% egg yolk containing a final extender concentration of 5% glycerol and 0.5% Equex STM, coupled with a TRIS-citrate-fructose thawing solution...
December 26, 2017: Cryobiology
https://www.readbyqxmd.com/read/29287623/olfactory-stimulation-or-inhibition-of-sexual-behavior-of-stallions-in-non-breeding-season
#15
Daniel Guillaume, Chantal Moussu, Frédéric de Geoffroy, Didier Chesneau, Matthieu Keller
Stallions show decreased sexual responses and activities during short days in winter. To evaluate the importance of sexual olfactory communication in horses, we tested whether sexual responses could be stimulated through various sexual olfactory stimulations in winter. To this end, we presented stallions with various olfactory stimulations (urine from mares at different stages of the reproductive cycle, urine from stallions or geldings, or chemically defined synthetic odorant) during the non-breeding season and measured their behavioral responses through (1) a test of olfactory investigation (olfactory investigation and flehmen behavior) and (2) a test of sexual activity in the context of semen collection for artificial insemination...
December 26, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/29286424/collection-of-post-mating-semen-from-the-female-reproductive-tract-and-measurement-of-semen-liquefaction-in-mice
#16
Shuai Li, Wipawee Winuthayanon
In mice, ejaculated semen is deposited in the uterus. After ejaculation, the semen changes consistency from gel-like to watery, a process called liquefaction. In this study, we show how to collect the post-ejaculated semen from the female reproductive tract in a mouse model. First, adult female mice in the estrus stage were housed in a male's cage overnight. The next morning, copulation was confirmed by the presence of copulatory plug at the vaginal opening. Female mice with copulatory plugs were euthanized, and each reproductive tract was collected as a whole (vagina, uterus, oviducts, ovaries), ensuring a closed system to contain the semen...
November 18, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29286006/altered-piwi-like-1-and-piwi-like-2-mrna-expression-in-ejaculated-spermatozoa-of-men-with-impaired-sperm-characteristics
#17
Maria Giebler, Thomas Greither, Lisa Müller, Carina Mösinger, Hermann M Behre
In about half the cases of involuntary childlessness, a male infertility factor is involved. The PIWI-LIKE genes, a subclade of the Argonaute protein family, are involved in RNA silencing and transposon control in the germline. Knockout of murine Piwi-like 1 and 2 homologs results in complete infertility in males. The aim of this study was to analyze whether the mRNA expression of human PIWI-LIKE 1-4 genes is altered in ejaculated spermatozoa of men with impaired sperm characteristics. Ninety male participants were included in the study, among which 47 were with normozoospermia, 36 with impaired semen characteristics according to the World Health Organization (WHO) manual, 5th edition, and 7 with azoospermia serving as negative control for the PIWI-LIKE 1-4 mRNA expression in somatic cells in the ejaculate...
December 26, 2017: Asian Journal of Andrology
https://www.readbyqxmd.com/read/29285596/differential-diagnostics-of-female-sexual-fluids-a-narrative-review
#18
REVIEW
Zlatko Pastor, Roman Chmel
INTRODUCTION AND HYPOTHESIS: Women expel various kinds of fluids during sexual activities. These are manifestations of sexual arousal and orgasm or coital incontinence. This study is aimed at suggesting a diagnostic scheme to differentiate among these phenomena. METHODS: Web of Science and Ovid (MEDLINE) databases were systematically searched from 1950 to 2017 for articles on various fluid expulsion phenomena in women during sexual activities, which contain relevant information on sources and composition of the expelled fluids...
December 28, 2017: International Urogynecology Journal
https://www.readbyqxmd.com/read/29284824/clozapine-induced-delayed-ejaculation
#19
Soumitra Das, Adesh Kumar Agrawal
No abstract text is available yet for this article.
November 2017: Indian Journal of Psychological Medicine
https://www.readbyqxmd.com/read/29277315/incubation-of-spermatozoa-with-anandamide-prior-to-cryopreservation-reduces-cryocapacitation-and-improves-post-thaw-sperm-quality-in-the-water-buffalo-bubalus-bubalis
#20
Puneeth Kumar, Tushar Kumar Mohanty, Arumugam Kumaresan, Pradeep Nag, Kaustubh Kishor Saraf, Vimlesh Kumar, Sreela Lathika, Samiksha Nayak, Mukesh Bhakat
Anandamide (AEA), an endocannabinoid, has been shown to reduce capacitation and acrosomal exocytosis in human spermatozoa. Because buffalo spermatozoa are highly susceptible to cryopreservation induced damage, AEA was assessed as to whether it could protect spermatozoa from cryo-damage. Six ejaculates from six Murrah buffalo bulls (total 36 ejaculates) were utilized for the study. Each ejaculate was divided into four aliquots; spermatozoa in Aliquot 1 were extended in Tris-Citrate-Egg Yolk and frozen as per the standard protocol...
December 21, 2017: Animal Reproduction Science
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