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sperm movement

Huina Zhang, Yingfen Ying, Yilu Chen, Xiaosheng Lu, Yonggang Huang
PROBLEM: The effects of chronic glomerulonephritis (CGN) on semen quality and cytokine levels in the semen of infertile males remain undetermined. METHOD OF STUDY: Fifty-eight semen samples from normal males and CGN males with and without infertility, respectively, were analyzed. RESULTS: Semen volume, semen pH, sperm density, percentage of forward movement of sperm, sperm activate rate, sperm survival rate, and rate of normal sperm morphology of infertility males with CGN were significantly lower than those of CGN males without infertility and normal males (P<...
November 8, 2016: American Journal of Reproductive Immunology: AJRI
Aukje M Meijerink, Liliana Ramos, Anjo J W M Janssen, Nienke M Maas-van Schaaijk, Andreas Meissner, Sjoerd Repping, Monique H Mochtar, Didi D M Braat, Kathrin Fleischer
OBJECTIVE: To evaluate at the age of 5 years the behavioral, cognitive, and motor performance and physical development of children born after testicular sperm extraction (TESE) and intracytoplasmic sperm injection (ICSI). DESIGN: A prospective longitudinal cohort study. SETTING: Two university medical centers. PATIENT(S): A total of 103 5-year-olds who were born after TESE-ICSI. INTERVENTION(S): The follow-up of the children was performed by questionnaires at birth and again at 1 year and at 4 years of age...
December 2016: Fertility and Sterility
R B Flores, Dsr Angrimani, B R Rui, M M Brito, R A Abreu, C I Vannucchi
Benign prostatic hyperplasia (BPH) has a high incidence in older intact dogs. Due to the increased prostatic oxidative stress and hormonal imbalance of BPH, sperm damage can arise, such as sperm morphological alterations and DNA fragmentation. This study aimed to compare the reproductive potential of healthy dogs and those affected by benign prostatic hyperplasia. Ten dogs were assigned to two experimental groups: dogs without BPH (control; n = 5) and dogs diagnosed with BPH (n = 5), based on clinical signs and ultrasonographic findings...
October 24, 2016: Reproduction in Domestic Animals, Zuchthygiene
W Tipkantha, P Thuwanut, B Siriaroonrat, P Comizzoli, K Chatdarong
Clouded leopards (Neofelis nebulosa) produced high proportion of abnormal spermatozoa (mainly tail defects) that can limit sperm movement and conception. The study aimed to better identify the origin of those defects using a demembranation approach. Ejaculates (1-2 ejaculations/male; n = 9) were allocated to simple washing (control; resulting in 11.7% ± 1.9% coiled tails) and processed through colloid centrifugation to reduce the number of sperm with tail defects (treatment, resulting in 5.9% ± 0.9% coiled tails)...
October 18, 2016: Reproduction in Domestic Animals, Zuchthygiene
Carles Soler, Jesús Contell, Lorena Bori, MarIa Sancho, Almudena García-Molina, Anthony Valverde, Jan Segarvall
This work provides information on the blue fox ejaculated sperm quality needed for seminal dose calculations. Twenty semen samples, obtained by masturbation, were analyzed for kinematic and morphometric parameters by using CASA-Mot and CASA-Morph system and principal component (PC) analysis. For motility, eight kinematic parameters were evaluated, which were reduced to PC1, related to linear variables, and PC2, related to oscillatory movement. The whole population was divided into three independent subpopulations: SP1, fast cells with linear movement; SP2, slow cells and nonoscillatory motility; and SP3, medium speed cells and oscillatory movement...
September 30, 2016: Asian Journal of Andrology
Renate Matzke-Karasz, Robin J Smith, Martin Heß
Previous studies of cypridoidean ostracods have noted that (1) their giant spermatozoa are immotile inside the male, (2) these spermatozoa are motile in the female seminal receptacle and (3) these receptacles are often filled with empty sperm coats. Such findings have led previous authors to hypothesize that sperm must shed their coats in the female receptacle to become motile. We present light and electron microscopy results and video recordings of mating experiments with virgin specimens of Mytilocypris mytiloides...
October 5, 2016: Cell and Tissue Research
R Zelli, R Orlandi, J Verstegen, A Troisi, A Elad Ngonput, L Menchetti, L Cardinali, A Polisca
Prostasome-like vesicles (PV) are components of the canine prostatic fluid during ejaculation and despite some enzymatic activities have been identified recently, their functions in the reproductive events in this species are still poorly understood. In this study, we evaluated at neutral or slightly alkaline pH, the effects of different concentrations of purified PV on sperm cell motility characteristics and the impact on the short- and long-term preservation of preserved semen maintained at room temperature...
September 27, 2016: Andrology
R J Aitken, L Muscio, S Whiting, H S Connaughton, B A Fraser, B Nixon, N D Smith, G N De Iuliis
The need to protect human spermatozoa from oxidative stress during assisted reproductive technology, has prompted a detailed analysis of the impacts of phenolic compounds on the functional integrity of these cells. Investigation of 16 individual compounds revealed a surprising variety of negative effects including: (i) a loss of mitochondrial membrane potential (Δψm) via mechanisms that were not related to opening of the permeability transition pore but associated with a reduction in thiol expression, (ii) a decline in intracellular reduced glutathione, (iii) the stimulation of pro-oxidant activity including the induction of ROS generation from mitochondrial and non-mitochondrial sources, (iv) stimulation of lipid peroxidation, (v) the generation of oxidative DNA damage, and (vi) impaired sperm motility...
September 19, 2016: Biochemical Pharmacology
Feng Qiu, Adam Chamberlin, Briana M Watkins, Alina Ionescu, Marta Elena Perez, Rene Barro-Soria, Carlos González, Sergei Y Noskov, H Peter Larsson
Voltage-gated proton (Hv1) channels are involved in many physiological processes, such as pH homeostasis and the innate immune response. Zn(2+) is an important physiological inhibitor of Hv1. Sperm cells are quiescent in the male reproductive system due to Zn(2+) inhibition of Hv1 channels, but become active once introduced into the low-Zn(2+)-concentration environment of the female reproductive tract. How Zn(2+) inhibits Hv1 is not completely understood. In this study, we use the voltage clamp fluorometry technique to identify the molecular mechanism of Zn(2+) inhibition of Hv1...
October 4, 2016: Proceedings of the National Academy of Sciences of the United States of America
Pilar Santolaria, Carles Soler, Pilar Recreo, Teresa Carretero, Araceli Bono, José M Berné, Jesús L Yániz
This study was designed to analyze the sperm kinematic and morphometric subpopulations in the different fractions of the ejaculate in normozoospermic men. Ejaculates from eight normozoospermic men were collected by masturbation in three fractions after 3-5 days of sexual abstinence. Analyses of sperm motility by computer-assisted sperm analysis (CASA-Mot), and of sperm morphometry by computer-assisted sperm morphometry analysis (CASA-Morph) using fluorescence were performed. Clustering and discriminant procedures were performed to identify sperm subpopulations in the kinematic and morphometric data obtained...
November 2016: Asian Journal of Andrology
David Haig
Haploid gametophytes of bryophytes spread by clonal growth but mate locally, within an area defined by the range of sperm movement. Rarity of establishment from spores or vegetative competition can result in unisexual populations unable to reproduce sexually. Females typically outcompete males, probably because females expend fewer resources than males on the production of gametes. Extreme sexual dimorphism-tiny males growing as epiphytes on much larger females-has evolved many times. Haploid selfing is common in bryophytes with bisexual gametophytes, and results in completely homozygous sporophytes...
October 19, 2016: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
Sandra L Gray, Brett R Lackey, William R Boone
BACKGROUND: Estrogen signaling pathways are modulated by exogenous factors. Panax ginseng exerts multiple activities in biological systems and is classified as an adaptogen. Zearalenol is a potent mycoestrogen that may be present in herbs and crops arising from contamination or endophytic association. The goal of this study was to investigate the impact of P. ginseng, zearalenol and estradiol in tests on spermatozoal function. METHODS: The affinity of these compounds for estrogen receptor (ER)-alpha and beta (ERα and ERβ)-was assessed in receptor binding assays...
July 2016: Journal of Ginseng Research
Li Qian, Sijiu Yu
PROBLEM: Lycium barbarum (L. barbarum) polysaccharides (LBPs) are the main bioactive component. However, effect of LBP on spermatogenesis of mice with impaired reproduction system induced by cyclophosphamide is undetermined. METHOD OF STUDY: This study aims to investigate the effect of LBP on spermatogenesis of rats with impaired reproduction system induced by cyclophosphamide. Kunming mice were randomly divided into five groups as follows: normal control group, model group (treated with cyclophosphamide) and three LBP groups (treated with cyclophosphamide and 0...
November 2016: American Journal of Reproductive Immunology: AJRI
Gergely Bernáth, Daniel Żarski, Eszter Kása, Ádám Staszny, Levente Várkonyi, Tímea Kollár, Árpád Hegyi, Zoltán Bokor, Béla Urbányi, Ákos Horváth
The applicability of a programmable freezer for the increased-scale cryopreservation of common carp sperm was investigated. The effect of different equilibration times, cryopreservation methods, extenders, dilution ratios, activating solutions on the post-thaw motility of common carp sperm was investigated. The suitable post-thaw storage time-interval as well as fertilizing capacity of cryopreserved sperm was also examined. The motility, curvilinear velocity (VCL) and straightness (STR) values did not decrease significantly during 60min of equilibration neither in equilibrated nor thawed groups...
October 1, 2016: General and Comparative Endocrinology
Mariana Andrade Torres, Rommy Díaz, Rodrigo Boguen, Simone Maria Massami Kitamura Martins, Gisele Mouro Ravagnani, Diego Feitosa Leal, Melissa de Lima Oliveira, Bruno Bracco Donatelli Muro, Beatriz Martins Parra, Flávio Vieira Meirelles, Frederico Ozanan Papa, José Antônio Dell'Aqua, Marco Antônio Alvarenga, Aníbal de Sant'Anna Moretti, Néstor Sepúlveda, André Furugen Cesar de Andrade
Boar semen cryopreservation remains a challenge due to the extension of cold shock damage. Thus, many alternatives have emerged to improve the quality of frozen-thawed boar sperm. Although the use of seminal plasma arising from boar sperm-rich fraction (SP-SRF) has shown good efficacy; however, the majority of actual sperm evaluation techniques include a single or dual sperm parameter analysis, which overrates the real sperm viability. Within this context, this work was performed to introduce a sperm flow cytometry fourfold stain technique for simultaneous evaluation of plasma and acrosomal membrane integrity and mitochondrial membrane potential...
2016: PloS One
Sylwia Prochowska, Wojciech Niżański, Agnieszka Partyka
The first aim of this study was to provide a comprehensive analysis of structural and functional features of spermatozoa in semen collected from the same cat by two methods: urethral catheterization and epididymis slicing. The second aim was to assess if feline urethral (CT) and epididymal (EP) spermatozoa undergo the same changes during cryopreservation and to compare the postthaw characteristics of spermatozoa collected by the two methods. In the first phase, CT and EP semen were collected from 20 cats, and sperm motility, viability, morphology, computer-assisted sperm analysis (CASA) parameters, membrane and acrosome integrity, mitochondrial potential, lipid peroxidation, and chromatin status were assessed...
November 2016: Theriogenology
Alejandro Vicente-Carrillo, Manuel Álvarez-Rodríguez, Heriberto Rodríguez-Martínez
Endogenous and exogenous opioids modulate reproductive functions in target cells via opioid receptors (μ, δ, and κ). Sperm motility is a metric of gamete functionality, and serves as a suitable parameter for in vitro drug-induced toxicity assays. This study identifies the presence and location of opioid receptors in pig spermatozoa as well as their functional response after in vitro challenge with known agonists (morphine [μ]; [D-Pen 2,5]-enkephanile [δ]; and U 50488 [κ]) and antagonists (naloxone [μ]; naltrindole [δ]; and nor-binaltrorphimine [κ])...
August 2016: Molecular Reproduction and Development
Li Qian, Qiong Li, Haibo Li
PROBLEM: The effects of hepatitis B virus (HBV) infection on sperm quality and oxidative stress state of the semen of infertile males remain undetermined. METHOD OF STUDY: Normal males and 60 semen samples from infertile males (with or without HBV infection) were subjected to semen analysis. RESULTS: Semen volume, semen pH, sperm density, percentage of forward, movement of sperm, sperm activation rate, sperm survival rate, rate of normal sperm morphology of infertile males with HBV infection were significantly lower than those of infertile males without genital infection and of normal males (P<...
September 2016: American Journal of Reproductive Immunology: AJRI
A Fais, M Johnson, M Wilson, N Aguilar Soto, P T Madsen
The sperm whale carries a hypertrophied nose that generates powerful clicks for long-range echolocation. However, it remains a conundrum how this bizarrely shaped apex predator catches its prey. Several hypotheses have been advanced to propose both active and passive means to acquire prey, including acoustic debilitation of prey with very powerful clicks. Here we test these hypotheses by using sound and movement recording tags in a fine-scale study of buzz sequences to relate the acoustic behaviour of sperm whales with changes in acceleration in their head region during prey capture attempts...
2016: Scientific Reports
Germán Martínez, Kaushik Panda, Claudia Köhler, R Keith Slotkin
Plant small interfering RNAs (siRNAs) communicate from cell to cell and travel long distances through the vasculature. However, siRNA movement into germ cells has remained controversial, and has gained interest because the terminally differentiated pollen vegetative nurse cell surrounding the sperm cells undergoes a programmed heterochromatin decondensation and transcriptional reactivation of transposable elements (TEs). Transcription of TEs leads to their post-transcriptional degradation into siRNAs, and it has been proposed that the purpose of this TE reactivation is to generate and load TE siRNAs into the sperm cells...
2016: Nature Plants
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