keyword
MENU ▼
Read by QxMD icon Read
search

acrosome

keyword
https://www.readbyqxmd.com/read/29789185/variation-in-post-thaw-sperm-quality-of-white-tailed-deer-bucks-odocoileus-virginianus-during-rut
#1
Jamie L Stewart, Clifford F Shipley, Robyn E Ellerbrock, Fabio S Lima, Igor F Canisso
White-tailed deer farming is a growing industry in the United States, with breeding operations contributing significantly to the industry's economic impact. Artificial insemination with frozen semen allows for selection and dissemination of valuable genetics, yet surprisingly little is known regarding the best time throughout rut to perform semen cryopreservation. The objective of this study was to compare semen quality following cryopreservation of white-tailed deer bucks collected early in the breeding season (September, n = 6), at peak rut (December, n = 8), and late season (March, n = 7)...
May 19, 2018: Animal Reproduction Science
https://www.readbyqxmd.com/read/29788183/membrane-rafts-regulate-sperm-acrosome-reaction-via-camp-dependent-pathway-in-chickens-gallus-gallus-domesticus
#2
Chathura Priyadarshana, Atsushi Tajima, Naoto Ishikawa, Atsushi Asano
Both transcriptionally and translationally inactive sperm need preassembled pathways into specific cellular compartments to function. Although initiation of the acrosome reaction (AR) involves several signaling pathways including protein kinase A (PKA) activation, how these are regulated remains poorly understood in avian sperm. Membrane rafts are specific membrane regions enriched in sterols and functional proteins and play important roles in diverse cellular processes, including signal transduction. Our recent studies on chicken sperm demonstrated that membrane rafts exist and play a role in multistage fertilization...
May 18, 2018: Biology of Reproduction
https://www.readbyqxmd.com/read/29783741/serine-protease-inhibitor-serpine2-reversibly-modulates-murine-sperm-capacitation
#3
Sheng-Hsiang Li, Yuh-Ming Hwu, Chung-Hao Lu, Ming-Huei Lin, Ling-Yu Yeh, Robert Kuo-Kuang Lee
SERPINE2 (serpin peptidase inhibitor, clade E, member 2), predominantly expressed in the seminal vesicle, can inhibit murine sperm capacitation, suggesting its role as a sperm decapacitation factor (DF). A characteristic of DF is its ability to reverse the capacitation process. Here, we investigated whether SERPINE2 can reversibly modulate sperm capacitation. Immunocytochemical staining revealed that SERPINE2 was bound onto both capacitated and uncapacitated sperm. It reversed the increase in BSA-induced sperm protein tyrosine phosphorylation levels...
May 19, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29782044/effect-of-various-levels-of-dissolved-oxygen-on-reactive-oxygen-species-and-cryocapacitation-like-changes-in-bull-sperm
#4
Beigh Y Amin, Jai K Prasad, Subrata K Ghosh, Shabir A Lone, Abhishek Kumar, Abdul R Mustapha, Omer Din, Ajay Kumar
The present investigation was carried out to study the effect of various levels of dissolved oxygen (DO) on reactive oxygen species (ROS) and cryocapacitation-like changes in bull sperm. Egg yolk-Tris-glycerol (EYTG) extender was split into four subextenders; viz., Extender I (control; no flushing with liquid nitrogen (LN2 )), Extender II, Extender III and Extender IV were flushed with LN2 for 40, 16 and 8 min, respectively. The DO levels were standardized to 11.7, 2, 4 and 8 ppm, respectively, in control (Extender I), Extender II, Extender III and Extender IV...
May 21, 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29777963/red-wolf-canis-rufus-sperm-quality-and-quantity-is-affected-by-semen-collection-method-extender-components-and-post-thaw-holding-temperature
#5
Ashley D Franklin, William T Waddell, Karen L Goodrowe
Cryopreserving genetic resources is becoming increasingly important for species management. In the zoo-based red wolf (Canis rufus) population, inbreeding continues to increase in the absence of new founders. Through banking sperm, we preserve genetic diversity and create the ability to decrease inbreeding accumulation in the future. The quality and quantity of banked sperm can be affected by cryopreservation media and semen collection methods. This study's objectives were to further optimize semen extender used for red wolf sperm cryopreservation, investigate effects of post-thaw holding temperature, and to determine if urethral catheterization is an effective method for semen collection in this species...
May 16, 2018: Theriogenology
https://www.readbyqxmd.com/read/29776697/cinnamtannin-b-1-a-novel-antioxidant-for-sperm-in-red-deer
#6
F Sánchez-Rubio, M R Fernández-Santos, L Castro-Vázquez, O García-Álvarez, A Maroto-Morales, A J Soler, F Martínez-Pastor, J J Garde
Cinnamtannin B-1 (CNB-1) is a naturally occurring trimeric A-type proanthocyanidin contained in several plants such as cinnamon (Cinnamomum zeylanicum). It is considered to be a potent antioxidant. The protective effect of CNB-1 against oxidative stress was assessed in red deer epididymal sperm incubated at 37 °C. Cryopreserved sperm from six stags were thawed, pooled and extended to 400 × 106 sperm/ml in BGM (bovine gamete medium). After being aliquoted, the samples were supplemented with different concentrations of CNB-1 (0, 0...
May 15, 2018: Animal Reproduction Science
https://www.readbyqxmd.com/read/29776696/single-layer-centrifugation-improves-the-quality-of-frozen-thawed-sperm-of-giant-panda-ailuropoda-melanoleuca
#7
Z G Cai, J H An, Y L Liu, S M Yie, Y Zhang, F P Li, J S Chen, X Wang, J M Morrell, R Hou
The reproductive capacity of captive giant pandas is poor and sperm cryopreservation is necessary for the reproduction and conservation of this species. Cryopreservation, however, leads to a significant decrease in sperm quality, including sperm motility, acrosome integrity and DNA integrity. In the present study, a method was developed based on colloid single layer centrifugation that could significantly improve frozen-thawed sperm quality. Two colloids were compared for post-thaw giant panda sperm preparation; the sperm samples had greater total motility (Colloid 1: 44...
May 15, 2018: Animal Reproduction Science
https://www.readbyqxmd.com/read/29773109/recombinant-%C3%AB-defensin-126-promotes-bull-sperm-binding-to-bovine-oviductal-epithelia
#8
A Lyons, F Narciandi, E Donnellan, J Romero-Aguirregomezcorta, C O' Farrelly, P Lonergan, K G Meade, S Fair
Primate β-defensin 126 regulates the ability of spermatozoa to bind to oviductal epithelial cells invitro. Bovine β-defensin 126 (BBD126) exhibits preferential expression in the cauda epididymis of the bull, but there have been few studies on its functional role in cattle. The aim of the present study was to examine the role of BBD126 in bull sperm binding to bovine oviductal epithelial cell (BOEC) explants. BBD126 has been shown to be highly resistant to the standard methods of dissociation used in other species and, as a result, corpus epididymal spermatozoa, which have not been exposed to the protein, were used to study the functional role of BBD126...
May 18, 2018: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/29765076/resveratrol-significantly-improves-the-fertilisation-capacity-of-bovine-sex-sorted-semen-by-inhibiting-apoptosis-and-lipid-peroxidation
#9
Chong-Yang Li, Ya-Han Zhao, Hai-Sheng Hao, Hao-Yu Wang, Jin-Ming Huang, Chang-Liang Yan, Wei-Hua Du, Yun-Wei Pang, Pei-Pei Zhang, Yan Liu, Hua-Bin Zhu, Xue-Ming Zhao
The aim of this study was to test the effects of five different concentrations (0, 10-3 , 10-4 , 10-5 , and 10-6  M) of resveratrol (Res) supplementation in bull sperm washing and fertilisation medium on levels of reactive oxygen species (ROS), phosphatidylserine (PS) externalisation, mitochondrial membrane potential (Δψm), ATP and malondialdehyde (MDA), acrosomal integrity, blastocyst rate, and blastocyst quality after in vitro fertilisation (IVF). The results for sex-sorted sperm from three bulls showed: (1) ROS and MDA levels in 10-3  M and 10-4  M Res groups were significantly lower than those of controls (P < 0...
May 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29764711/does-lipid-peroxidation-and-oxidative-dna-damage-differ-in-cryopreserved-semen-samples-from-young-adult-and-aged-nellore-bulls
#10
Juliane Teramachi Trevizan, Janaina Torres Carreira, Isadora Resende Carvalho, Bruna Helena Kipper, Walter Bertequine Nagata, Silvia Helena Venturoli Perri, Maria Emilia Franco Oliveira, Julia Cestari Pierucci, Marion Burkhardt de Koivisto
The aims of this study were to evaluate cryopreserved semen of Nellore bulls of different ages and verify whether sperm quality declines with advancing age and whether lipid peroxidation and DNA damage are involved in this process. For this purpose, 40 Nellore bulls were divided into three age groups: Young, aged 1.8-2 years (n = 9); Adult, aged 3.5-7.0 years (n = 19); and Seniors, aged 8.0-14.3 years (n = 12). Three ejaculates were collected from each bull, cryopreserved and evaluated for various parameters including membrane integrity, mitochondrial potential (FITC-PSA and JC1), lipid peroxidation (C-11BODIPY 581 / 591) and oxidative DNA damage (8OHdG) using flow cytometry...
April 17, 2018: Animal Reproduction Science
https://www.readbyqxmd.com/read/29749276/cryopreservation-of-low-number-of-human-spermatozoa-which-is-better-vapor-phase-or-direct-submerging-in-liquid-nitrogen
#11
Akram Hosseini, Mohammad Ali Khalili, Ali Reza Talebi, Azam Agha-Rahimi, Saeed Ghasemi-Esmailabad, Bryan Woodward, Nahid Yari
Cryopreservation and subsequent survival of semen samples with low numbers of human spermatozoa in assisted reproductive technology (ART) facilities can be challenging. The aim of this study was to compare the quality of warmed human spermatozoa following vitrification using direct submerging (DS) in liquid nitrogen (LN2 ) or with LN2 vapour (V). Normozoospermic ejaculates were prepared by the swim-up technique and the motile sperm fraction was divided into three groups: (i) fresh (control); (ii) DS methods in LN2 (DS Group); or (iii) cryopreserved in V (Group V)...
May 11, 2018: Human Fertility: Journal of the British Fertility Society
https://www.readbyqxmd.com/read/29734431/quercetin-in-equine-frozen-semen
#12
J S Filho, C D Corcini, F C C Santos, A N Anciuti, N L S Gatti, E Anastacio, R Mielke, C E W Nogueira, B R Curcio, A S Varela
  BACKGROUND: Supplementation of sperm diluents to reduce the damage caused by the freeze-thaw cycle is broadly used in equine semen cryopreservation. OBJECTIVE: The present study aimed at determining the most appropriate quercetin supplementation in equine freezing extender. MATERIALS AND METHODS: Quercetin at four different concentrations (0.25, 0.5, 0.75 or 1 mM) was added in the sperm freezing diluent before the freeze-thaw cycle. The spermatozoa population was analyzed by flow cytometry and a statistical analysis was conducted to detect significant differences between control and treated samples...
July 2017: Cryo Letters
https://www.readbyqxmd.com/read/29734425/supplementation-of-rosmarinic-acid-has-reduced-oxidative-stress-on-bull-spermatozoa-following-the-freeze-thawing-process
#13
D Yeni, M E Inanc, F Avdatek, P B Tuncer, B Cil, R Turkmen, U Tasdemir
BACKGROUND: Cryopreservation has a side effect on the motility, chromatin integrity and viability of sperm cells. OBJECTIVE: The present study investigated the effects of supplementation with rosmarinic acid (RA) Tris extender on sperm quality parameters, plasma and acrosome membrane damage, antioxidant enzyme activity and chromatin integrity following the freeze thawing process on bull spermatozoa. MATERIALS AND METHODS: Ejaculates were split into five aliquots and diluted to a final concentration of 15x106 spermatozoa per ml with the Tris extender containing RA (25, 50, 100 and 200 microgram per ml) and (control) and then frozen at a controlled rate...
March 2018: Cryo Letters
https://www.readbyqxmd.com/read/29734402/effects-of-cryopreservation-on-ultrastructural-morphology-of-white-shrimp-litopenaeus-vannamei-sperm
#14
Y Zhao, C Yang, X Chen, M Peng, X Chen, D Zeng
BACKGROUND: The structural integrity of a spermatozoon is very important for the processes of fertilization and embryo development. OBJECTIVE: To provide valuable data for developing better cryopreservation techniques for shrimp sperm. MATERIALS AND METHODS: Using scanning electron microscopy and transmission electron microscopy, we examined the morphological alteration of Litopenaeus vannamei sperm after cryopreservation with different concentrations of dimethylsulfoxide (DMSO)...
September 2017: Cryo Letters
https://www.readbyqxmd.com/read/29733332/ccdc87-is-critical-for-sperm-function-and-male-fertility
#15
Tongtong Wang, Qianqian Yin, Xuehao Ma, Ming-Han Tong, Yuchuan Zhou
Male infertility has become an increasingly common health concern in recent years. Apart from environmental factors, nutrition, lifestyle, and sexually transmitted diseases, genetic defects are important causes of male infertility. Many genes have been demonstrated to be associated with male infertility. However, the roles of some functional genes in infertility, especially those that are specifically expressed in the reproductive system, remain to be elucidated. Here, we demonstrated that the testis-specific gene coiled-coil domain-containing 87 (Ccdc87) is critical for male fertility...
May 3, 2018: Biology of Reproduction
https://www.readbyqxmd.com/read/29730010/g-protein-coupled-estrogen-receptor-gper-in-adult-boar-testes-epididymis-and-spermatozoa-during-epididymal-maturation
#16
Romana Krejčířová, Marie Maňasová, Veronika Sommerová, Eva Langhamerová, Radko Rajmon, Pavla Maňásková-Postlerová
The G protein-coupled estrogen receptor (GPER) is a transmembrane receptor considered as a mediator of rapid non-genomic responses. GPER has been found in the male reproductive tract of many mammalian species. However, in adult boars, GPER has been reported only in ejaculated spermatozoa. Therefore, we focused on GPER detection in testicular and epididymal tissues and sperm cells in adult boars. We found GPER in Leydig cells and seminiferous tubules of boar testes and in the secretory epithelium of epididymis...
May 3, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29729147/assessment-of-azadirachtin-a-a-neem-tetranortritarpinoid-on-rat-spermatozoa-during-in-vitro-capacitation
#17
Teesta V Katte, Malempati Rajyalakshmi, Ravindranath H Aladakatti
BACKGROUND: The exploration of the biological assessment of technical azadirachtin, a tetranortritarpinoid from the neem seed kernel, was reviewed. The present study was, therefore, designed to evaluate the dose-dependent in vitro effects of azadirachtin-A, particularly on the functional studies and determination of molecular events, which are critical in the process of sperm capacitation. METHODS: To assess the effects of the azadirachtin-A on the functional studies, sperm capacitation, the total sperm adenosine triphosphate levels, acrosome reaction (AR), the sperm-egg interaction and the determination of molecular events like cyclic adenosine-3',5'-monophosphate and calcium levels, the appropriate volumes of the sperm suspension were added to the medium to a final concentration of 1×106 sperm/mL and incubated in a humidified atmosphere of 5% CO2 in air at 37°C...
May 5, 2018: Journal of Basic and Clinical Physiology and Pharmacology
https://www.readbyqxmd.com/read/29728588/multiple-aspects-of-male-germ-cell-development-and-interactions-with-sertoli-cells-require-inositol-hexakisphosphate-kinase-1
#18
Chenglai Fu, Tomas Rojas, Alfred C Chin, Weiwei Cheng, Isaac A Bernstein, Lauren K Albacarys, William W Wright, Solomon H Snyder
Inositol hexakisphosphate kinase-1 (IP6K1) is required for male fertility, but the underlying mechanisms have been elusive. Here, we report that IP6K1 is required for multiple aspects of male germ cell development. This development requires selective interactions between germ cells and Sertoli cells, namely apical ectoplasmic specialization. Spermiation (sperm release) requires tubulobulbar complexes. We found that the apical ectoplasmic specialization and tubulobulbar complexes were poorly formed or disrupted in IP6K1 KOs...
May 4, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29724523/geranylgeranylacetone-induction-of-hsp90%C3%AE-exerts-cryoprotective-effect-on-acipenser-sinensis-sperm
#19
Meng Dan Xi, Ping Li, Hao Du, Xin Mei Qiao, Zhi Gang Liu, Wei Qi Wei
Heat Shock Protein 90 (HSP90) is a fertility-associated protein, the expression of which positively correlates with sperm quality in many species. Geranylgeranylacetone (GGA) is reported to induce expression of HSP90. The present study aimed to investigate whether GGA induced expression of HSP90 in Acipenser sinensis sperm to exert a cryoprotective effect. Sperm from five male A. sinensis was combined with extender containing 20 mmol/L tris pH = 8.1, 10% v/v methanol, 2-5 mmol/L KCl, 15 mmol/L lactose, and 15 mmol/L trehalose, with GGA at 0, 14, 67, 135, 673, 1346, or 6731 μmol/L...
April 16, 2018: Animal Reproduction Science
https://www.readbyqxmd.com/read/29723624/localization-of-mif-ii-on-mammalian-spermatozoa-a-study-revealing-its-structure-function-and-motility-inhibitory-pathway
#20
Arpita Bhoumik, Sudipta Saha, Pavan V Payghan, Prasanta Ghosh, Sandhya Rekha Dungdung
Motility of spermatozoa is crucial factor for determining semen quality. Here we report Motility inhibitory factor (MIF-II) from goat epididymal plasma, revealing its structure, function, localization and motility inhibitory pathway. Structural characterization with MALDI revealed novelty of this protein while circular dichroism data confirmed its alpha helical nature. Higher dilutions of MIF-II antibody increased cauda sperm motility and induced immature/immotile caput sperm motility as tested microscopically...
April 30, 2018: International Journal of Biological Macromolecules
keyword
keyword
100873
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"