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https://www.readbyqxmd.com/read/28528312/low-sensitivity-of-reproductive-life-stages-in-the-pacific-oyster-crassostrea-gigas-to-abamectin
#1
Laura J Falkenberg, Anna-Lisa Wrange, Alexandra Kinnby, Jon N Havenhand, Antony Lockyer, Craig A Styan
Hard surfaces submerged in the marine environment often become colonised by macro-organisms unless the surfaces have some form of biofouling protection. While protective paints that contain tributyltin or copper work well to prevent biofouling, release of these materials into the environment has been shown to have wider negative impacts. Consequently, new low-release antifouling paints are being developed with alternative active ingredients, such as avermectins, yet little is known about their potential effects on non-target organisms in marine environments...
May 15, 2017: Chemosphere
https://www.readbyqxmd.com/read/28526326/effects-on-the-reproductive-system-of-young-male-rats-of-subcutaneous-exposure-to-n-butylparaben
#2
Tania Garcia, Elga Schreiber, Vikas Kumar, Raju Prasad, Juan J Sirvent, Jose L Domingo, Mercedes Gómez
This study was aimed at determining whether an in vivo subcutaneous exposure to n-butylparaben (n-ButP) during one complete spermatogenic cycle could be harmful to the reproductive system of young male rats. Animals were subcutaneously given 0, 150, 300 and 600 mg/kg/day of n-ButP with vehicle (peanut oil). Body and organ weights, n-ButP excretion, biochemical parameters, sperm and spermatid count, sperm motility, viability, maturity and morphology were examined. Results showed that after a completed spermatogenic cycle, although n-ButP did not induce dose-related changes in the different biochemical parameters, a significant decrease of triacylglicerides (TAG) -due to the vehicle-was found...
May 16, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28525858/effects-of-intermediate-frequency-magnetic-fields-on-male-fertility-indicators-in-mice
#3
K Kumari, M Capstick, A M Cassara, M Herrala, H Koivisto, J Naarala, H Tanila, M Viluksela, J Juutilainen
Human exposure to intermediate frequency (IF) fields is increasing due to new applications such as electronic article surveillance systems, wireless power transfer and induction heating cookers. However, limited data is available on effects of IF magnetic fields (MF) on male fertility function. This study was conducted to assess possible effects on fertility indicators from exposure to IF MF. Male C57BL/6J mice were exposed continuously for 5 weeks to 7.5kHz MF at 12 and 120μT. Sperm cells from cauda epididymis were analysed for motility, total sperm counts, and head abnormalities...
May 16, 2017: Environmental Research
https://www.readbyqxmd.com/read/28525330/effect-of-boar-ejaculate-fraction-extender-type-and-time-of-storage-on-quality-of-spermatozoa
#4
A Dziekońska, K Świąder, M Koziorowska-Gilun, K Mietelska, Ł Zasiadczyk, W Kordan
The aim of this study was to investigate the effect the sperm-rich fraction (F1) and the post-F1 fraction (F2) on the quality of boar spermatozoa stored in a liquid state. Ejaculates were collected from three Polish Landrace boars. Each ejaculate fraction was diluted with BTS short-term extender and Safe-Cell Plus (SCP) long-term extender and stored for seven days (D1-D7) at 17°C. Analyses included sperm motility parameters, normal apical ridge (NAR) acrosomes and plasma membrane integrity (PMI). Prior to the dilution of fractions, marked changes (p<0...
March 28, 2017: Polish Journal of Veterinary Sciences
https://www.readbyqxmd.com/read/28523408/genetics-and-epigenetics-of-varicocele-pathophysiology-an-overview
#5
REVIEW
Viviane Paiva Santana, Cristiana Libardi Miranda-Furtado, Flavia Gaona de Oliveira-Gennaro, Rosana Maria Dos Reis
Varicocele is found in approximately 20% of adults and adolescents and in 19-41% of men seeking treatment for infertility. It is associated with a decrease in sperm count as well as sperm motility and morphology. The currently accepted description of the pathophysiology of varicocele does not explain all its clinical manifestations; therefore, other factors such as genetic and epigenetic changes, associated with the environment, might be involved in causing infertility and decrease in sperm quality. It has been reported that the varicocele-induced deterioration of testicular function is progressive and interferes with fertility; hence, early and efficient assessment of the genetic manifestations in patients would be important for developing future medical interventions...
May 18, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28523277/the-effect-of-l-carnitine-hypotaurine-and-taurine-supplementation-on-the-quality-of-cryopreserved-chicken-semen
#6
Agnieszka Partyka, Olga Rodak, Joanna Bajzert, Joanna Kochan, Wojciech Niżański
The objective of this study was to investigate the effect of L-carnitine (LC), hypotaurine (HT), and taurine (T) on the quality of frozen-thawed chicken semen. Pooled semen samples were divided into seven aliquots (control, 1 mM LC, 5 mM LC, 1 mM HT, 10 mM HT, 1 mM T, and 10 mM T) and subjected to cryopreservation. Postthaw sperm motility was determined by IVOS system and sperm characteristics were assessed with fluorochromes and flow cytometry. The highest sperm motility and the highest percentage of viable sperm were in the HT1 group (P < 0...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28521061/extracellular-camp-activates-molecular-signalling-pathways-associated-with-sperm-capacitation-in-bovines
#7
Carlos Agustín I Alonso, Claudia E Osycka-Salut, Luciana Castellano, Andreína Cesari, Nicolás Di Siervi, Adrián Mutto, Anders Johannisson, Jane M Morrell, Carlos Davio, Silvina Perez-Martinez
STUDY QUESTION: Is extracellular cAMP involved in the regulation of signalling pathways in bovine sperm capacitation? SUMMARY ANSWER: Extracellular cAMP-induced sperm capacitation through the activation of different signalling pathways that involve phospholipase C (PLC), PKC/ERK1-2 signalling and an increase in sperm Ca2+ levels, as well as soluble AC and cAMP/protein kinase A (PKA) signalling. WHAT IS KNOWN ALREADY: In order to fertilize the oocyte, ejaculated spermatozoa must undergo a series of changes in the female reproductive tract, known as capacitation...
May 18, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/28520729/top-quality-blastocyst-formation-rates-in-relation-to-progesterone-levels-on-the-day-of-oocyte-maturation-in-gnrh-antagonist-ivf-icsi-cycles
#8
V S Vanni, E Somigliana, M Reschini, L Pagliardini, E Marotta, S Faulisi, A Paffoni, P Vigano', W Vegetti, M Candiani, E Papaleo
Cycles with progesterone elevation during controlled ovarian stimulation (COS) for IVF/ICSI are commonly managed with a "freeze-all" strategy, due to a well-recognized detrimental effect of high progesterone levels on endometrial receptivity. However, also a detrimental effect of elevated progesterone on day-3 embryo quality has recently been found with regards to top quality embryo formation rate. Because blastocyst culture and cryopreservation are largely adopted, we deemed relevant to determine whether this detrimental effect is also seen on blastocyst quality on day 5-6...
2017: PloS One
https://www.readbyqxmd.com/read/28520723/follicular-size-predicts-success-in-artificial-insemination-with-frozen-thawed-sperm-in-donkeys
#9
Joseph Saragusty, Alemayehu Lemma, Thomas Bernd Hildebrandt, Frank Göritz
In asses, semen collection, cryopreservation, and artificial insemination (AI) with frozen-thawed semen have been scarcely described and success rate, particularly following AI, is reportedly low. In the absence of reliable protocols, assisted reproductive technologies cannot support the conservation efforts aimed at endangered wild ass species and domestic donkey breeds. Two experiments were conducted in this study. In experiment 1 we evaluated freezing Abyssinian donkey (N = 5, 4 ejaculates each) spermatozoa using three freezing extenders (Berliner Cryomedium + glycerol, BC+G; BotuCrio, BOTU; INRAFreeze, INRA) and two cryopreservation techniques (liquid nitrogen vapour, LNV; directional freezing, DF)...
2017: PloS One
https://www.readbyqxmd.com/read/28520588/evaluation-of-the-quality-of-semen-and-sexual-function-in-men-with-inflammatory-bowel-disease
#10
Paz Valer, Alicia Algaba, Daniel Santos, Manuel E Fuentes, Elva Nieto, Javier P Gisbert, Pilar López, Elvira Quintanilla, Francisco J García-Alonso, Iván Guerra, Álvaro Páez, Fernando Bermejo
BACKGROUND: Data on fertility rates and medication safety in men with inflammatory bowel disease (IBD) are limited. The aim of this study was to evaluate whether there is a seminal alteration in patients with IBD and, if so, to evaluate the mechanisms that may play a role according to what has been described in the literature. Its secondary aim was to evaluate the impact on male sexual function of IBD. METHODS: Multicenter, cross-sectional, case series study comparing men with IBD and control subjects...
May 16, 2017: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/28517368/testicular-thermoregulation-scrotal-surface-temperature-patterns-and-semen-quality-of-water-buffalo-bulls-reared-in-a-tropical-climate
#11
L K X Silva, J S Sousa, A O A Silva, J B Lourenço Junior, C Faturi, L G Martorano, I M Franco, M H A Pantoja, D V Barros, A R Garcia
This study evaluated the capacity of thermoregulation and its consequences on the scrotal surface temperature patterns and semen quality of buffalo bulls raised in a wet tropical climate. Eleven water buffaloes were evaluated in the rainiest, in the transitional and in the less rainy season. Air temperature and humidity were consistently high, but the animals did not show thermal stress in any season. The scrotal temperature gradient of buffalo bulls using infrared thermography was described, and three parallel and decreasing thermal bands were characterised...
May 18, 2017: Andrologia
https://www.readbyqxmd.com/read/28517043/sperm-chromatin-quality-and-dna-integrity-in-partial-versus-total-globozoospermia
#12
A R Talebi, J Ghasemzadeh, M A Khalili, I Halvaei, F Fesahat
Globozoospermia is a severe form of teratozoospermia with low incidence in infertile patients, considered as one of the important causes of male infertility. The objective was to investigate the chromatin/DNA integrity as well as apoptosis in ejaculated spermatozoa of cases with partial or total globozoospermia. Fifty-seven semen samples were divided into three groups of partial globozoospermia (n = 17), total globozoospermia (n = 10) and normozoospermia (control; n = 30). Sperm chromatin condensation, DNA integrity and apoptosis were assessed using cytochemical assays...
May 18, 2017: Andrologia
https://www.readbyqxmd.com/read/28516060/the-effects-of-vitamin-c-on-sperm-quality-parameters-in-laboratory-rats-following-long-term-exposure-to-cyclophosphamide
#13
Sheida Shabanian, Farnoosh Farahbod, Mahmoud Rafieian, Forouzan Ganji, Afshin Adib
Cyclophosphamide is a widely used medication and can cause oxidative stress. This study was conducted to investigate the effects of Vitamin C on reproductive organs' weight and the quality of sperm parameters in laboratory rats. In this experimental study, 40 rats were randomly assigned into five groups of eight each. Distilled water (DW) group received only food and water, Group 2 was administered with drug solvent (DW) by gavage, Group 3 intraperitoneally administered with 1.6 mg/kg cyclophosphamide, Group 4 gavaged Vitamin C at 0...
April 2017: Journal of Advanced Pharmaceutical Technology & Research
https://www.readbyqxmd.com/read/28512759/effect-of-ph-on-rheotaxis-of-bull-sperm-using-microfluidics
#14
T M El-Sherry, M A Abdel-Ghani, N S Abou-Khalil, M Elsayed, M Abdelgawad
The aim of the present research is to study the effect of pH values on the sperm rheotaxis properties. Semen collected from bulls was diluted with SOF medium (1:10). pH of the medium was adjusted using a digital pH meter to the following pH values: 6.0, 6.2, 6.4, 6.4, 6.8, 7.0. All kinetic parameters of sperm (n = 3,385) were determined through a computer-assisted sperm analysis (CASA) system using microfluidic devices with controlled flow velocity. The following parameters were determined: total motility (TM%), positive rheotaxis (PR%), straightline velocity (VSL, μm/s), average path velocity (VAP, μm/s), linearity (LIN, as VSL/VCL, %), beat cross-frequency (BCF, Hz) and curvilinear velocity (VCL, μm/s)...
May 16, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28511862/effect-of-different-concentrations-of-egg-yolk-and-virgin-coconut-oil-in-tris-based-extenders-on-chilled-and-frozen-thawed-bull-semen
#15
A A Tarig, H Wahid, Y Rosnina, N Yimer, Y M Goh, F H Baiee, A M Khumran, H Salman, M Ebrahimi
The aim of this study was to evaluate the effects of 8% virgin coconut oil (VCO) combined with different percentages of egg yolk in Tris extender on the quality of chilled and frozen-thawed bull semen. A total of 24 ejaculates from four bulls were collected using an electroejaculator. Semen samples were diluted with 8% VCO in Tris extender which contained different concentrations 0% (control), 4%, 8%, 12%, 16% and 20% egg yolk. The diluted semen samples were divided into two fractions: one was chilled and stored at 4°C until evaluation after 24, 72, and 144h; the second fraction was processed by chilling for 3h at 4°C to equilibrate, then packaged in 0...
April 10, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28510703/long-chain-fatty-acid-triglyceride-tg-metabolism-disorder-impairs-male-fertility-a-study-using-adipose-triglyceride-lipase-deficient-mice
#16
Hidetake Masaki, Namhyo Kim, Hitomi Nakamura, Keiichi Kumasawa, Eriko Kamata, Ken-Ichi Hirano, Tadashi Kimura
STUDY QUESTION: Does the deletion of adipose triglyceride lipase (Atgl) gene impair male fertility? SUMMARY ANSWER: The deletion of Atgl gene impaired male fertility but the effect was partially reversed by a low long chain triglyceride (TG) diet. WHAT IS KNOWN ALREADY: ATGL specifically hydrolyses long-chain fatty acid triglyceride (TG) to diacylglycerol and a high level of expression of ATGL in testes has been reported. However, the role of ATGL in male fertility is unknown...
May 16, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/28510469/outer-dense-fiber-proteins-bridging-between-male-infertility-and-cancer
#17
Faezeh Azizi, Soudeh Ghafouri-Fard
BACKGROUND: The similarities between gametogenic and carcinogenesis processes have been noted for more than decades. Among prominent similarities between these two processes is expression of a group of antigens, namely cancer-testis antigens in both the testes and various cancer tissues. Outer dense fiber (ODF) proteins are testis-specific proteins localized to sperm tails and involved in sperm motility. METHODS: We performed a computerized search of the MEDLINE/PUBMED databases with keywords "outer dense fiber, ODF, cancer, testis, gametogenesis and infertility"...
May 2017: Archives of Iranian Medicine
https://www.readbyqxmd.com/read/28507119/regulation-of-the-sperm-calcium-channel-catsper-by-endogenous-steroids-and-plant-triterpenoids
#18
Nadja Mannowetz, Melissa R Miller, Polina V Lishko
The calcium channel of sperm (CatSper) is essential for sperm hyperactivated motility and fertility. The steroid hormone progesterone activates CatSper of human sperm via binding to the serine hydrolase ABHD2. However, steroid specificity of ABHD2 has not been evaluated. Here, we explored whether steroid hormones to which human spermatozoa are exposed in the male and female genital tract influence CatSper activation via modulation of ABHD2. The results show that testosterone, estrogen, and hydrocortisone did not alter basal CatSper currents, whereas the neurosteroid pregnenolone sulfate exerted similar effects as progesterone, likely binding to the same site...
May 15, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28501790/obesity-aggravates-toxic-effect-of-bpa-on-spermatogenesis
#19
Weiyue Hu, Tianyu Dong, Lingling Wang, Quanquan Guan, Ling Song, Daozhen Chen, Zuomin Zhou, Minjian Chen, Yankai Xia, Xinru Wang
Both bisphenol A (BPA) and obesity affect male reproductive system. However, whether there is an interaction between them remains poorly understood. The aim of the present study was to evaluate the interaction between BPA exposure and obesity on semen quality and elucidate the mechanism in humans and animals. We firstly analyzed the interaction on semen volume, sperm count per ejaculate, sperm concentration and sperm motility in 357 men, and found that urinary BPA concentration was significantly correlated with sperm count per ejaculate in obese men (β=-34...
May 11, 2017: Environment International
https://www.readbyqxmd.com/read/28501545/betamethasone-causes-intergenerational-reproductive-impairment-in-male-rats
#20
Cibele Dos Santos Borges, Taina Louise Pacheco, Katiussia Pinho da Silva, Fábio Henrique Fernandes, Mary Gregory, André Sampaio Pupo, Daisy Maria F Salvadori, Daniel G Cyr, Wilma De G Kempinas
Prenatal betamethasone (BM) exposure in rats negatively impacts sperm quality and male fertility. Studies have shown that BM can cause multi-generational effects on the pituitary-adrenal-axis of rats. The objective of this study was to assess the reproductive development and fertility of male rats (F2) whose fathers (F1) were exposed to BM (0.1mg/kg) on gestational days 12, 13, 18 and 19. In F2 rats, there was a significant reduction in body weights of the BM-treated group at PND 1 as well as delayed onset of puberty, and decreases in FSH levels, Leydig cell volume, sperm number and motility, seminal vesicle contractility and ejaculated volume...
May 10, 2017: Reproductive Toxicology
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