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Reproductive Biology

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https://www.readbyqxmd.com/read/28935119/effects-of-cdk-inhibitors-on-the-maturation-transcription-and-mpf-activity-of-porcine-oocytes
#1
Reza K Oqani, Tao Lin, Jae Eun Lee, So Yeon Kim, Jung Won Kang, Dong Il Jin
In mammals, cyclin-dependent kinases (CDKs) are involved in regulating both the cell cycle and transcription. Although CDK1 is known to act as the kinase subunit of maturation-promoting factor (MPF), the roles of the other CDKs in mammalian oocyte maturation are not yet understood. Here, we show that inhibition of various CDKs by small molecule inhibitors has different effects on the maturation and transcriptional activity of pig oocytes in vitro. Inhibition of CDK1 did not significantly affect cumulus cell expansion, but its kinase activity was necessary for germinal vesicle breakdown (GVBD)...
September 18, 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28927798/effect-of-charcoal-dextran-stripped-fetal-bovine-serum-on-in-vitro-development-of-bovine-embryos
#2
Ayman Mesalam, Rami Kong, Imran Khan, Mmr Chowdhury, Byung-Hyun Choi, Sung Woo Kim, Kyu-Woan Cho, Jong-In Jin, Il-Keun Kong
This study investigated the ability of charcoal:dextran stripped fetal bovine serum (CDS FBS) and heat-inactivated fetal bovine serum (HI FBS) to support in vitro development of bovine embryos. The developmental ability and quality of bovine embryos were determined by assessing their cell number, lipid content, mitochondrial activity, gene expression, and cryo-tolerance. The percentage of embryos that formed a blastocyst was significantly (P<0.05) higher in medium containing CDS FBS than in medium containing HI FBS (42...
September 16, 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28927797/the-decline-of-pregnancy-rate-and-abnormal-uterine-responsiveness-of-steroid-hormones-in-aging-mice
#3
Meng-Qi Li, Mei-Nan Yao, Jia-Qi Yan, Zi-Long Li, Xiao-Wei Gu, Shuai Lin, Wei Hu, Zeng-Ming Yang
Reproductive capacity in animals and women declines with increasing age. Although ovarian aging is considered as a main cause for the decline of pregnancy rate, whether uterine aging occurs remains unclear. Even if blastocysts are transferred from young donors to older pseudopregnant recipients, the rate of implantation is still low, suggesting the occurrence of uterine aging. In this study, we compared the pregnancy rate and the uterine responsiveness of steroid hormones in ovariectomized mice at age between 2- and 12-month-old...
September 16, 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28736292/reproductive-features-and-use-of-an-anti-inflammatory-drug-in-estrus-induced-dairy-goats-artificially-inseminated-in-a-standing-position-with-cervix-immobilization
#4
Jeferson Ferreira Fonseca, Gilmar Pereira Alvim, Joanna Maria Gonçalves Souza-Fabjan, Maria Emília Franco Oliveira, Viviane Lopes Brair, Felipe Zandonadi Brandão, Olivardo Facó
This study evaluated reproductive features and role of Flunixin-Meglumine at timed artificial insemination (AI), using a new technique of standing position with cervix immobilization. In Experiment 1, 10 goats (n=5 nulliparous [Null] and 5 pluriparous [Plu]) were evaluated after estrus induction by recorded reproductive parameters to define the ideal time for AI. In Experiment 2, goats were artificially inseminated 51-54h after sponge removal with frozen-thawed semen. At AI, 1mL saline (CONTROL; 18 Null and 14 Plu) or 50mg Flunixin-Meglumine (FLUNIXIN; 15 Null and 18 Plu) was administered i...
September 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28716446/dose-dependent-effect-of-resveratrol-in-preventing-cisplatin-induced-ovarian-damage-in-rats-an-experimental-study
#5
Mine Atli, Yaprak Engin-Ustun, Aytekin Tokmak, Muzaffer Caydere, Sema Hucumenoglu, Canan Topcuoglu
This study aimed to evaluate the effect of resveratrol in preventing cisplatin (CP) induced ovarian damage in rats. Twenty-eight female Wistar albino rats were separated into four groups. No medication was given to group 1. Over the 21-day study period, low-dose resveratrol was given to group 2, high-dose resveratrol was given to group 3, and saline was administered to group 4. On the 15th day of medication, all groups except for group 1 were treated with a single dose of CP. Serum levels of anti-Mullerian hormone (AMH) were tested at baseline and on the 15th and 21st days...
September 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28647515/a-phytoestrogen-supplement-prevents-the-altered-gene-expression-associated-with-pregnancy-implantation-induced-by-il-1%C3%AE-in-endometrial-epithelial-cells
#6
Sayaka Suzuki, Noe Nakashima, Masakatsu Kageyama, Kazuo Yamagata
Phytoestrogens stimulate expression of the uterine estrogen receptor and regulate uterine functions in reproductive tissues. However, comprehensive understanding of the beneficial impacts of phytoestrogens on uterine biology at the molecular level remains unexplored. Interleukin-1β (IL-1β) expression is increased in the inflamed decidua and is associated with first trimester pregnancy loss. AglyMax-Sup has the same composition as that of the phytoestrogen supplement AglyMax but with added vitamins and other components...
September 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28624353/expression-of-hypoxia-inducible-factor-1%C3%AE-and-antioxidant-enzymes-superoxide-dismutases-1-and-2-in-ischemic-porcine-endometrium
#7
Joanna Kwiatkowska, Barbara Wąsowska, Przemysław Gilun
The aim of this study was to determine how 60-min ischemia changes the expression of hypoxia inducible factor 1α (HIF-1α) and superoxide dismutases (SOD)-1 and -2 in selected regions of porcine uterine horns. The results showed that 60-min ischemia of the porcine uterus conducted at the mid-secretory estrous phase caused decreased HIF-1α and increased SOD-2 gene expression. Higher expression of SOD-2 suggests that this enzyme may play an important role in the suppression of HIF-1α accumulation in an ischemic endometrium...
September 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28579338/serine-like-proteolytic-enzymes-from-common-carp-cyprinus-carpio-l-seminal-plasma-are-able-to-degrade-sperm-proteins
#8
Beata Irena Cejko, Mariola Słowińska, Sylwia Judycka, Radosław Kajetan Kowalski
The application of zymography, with sperm proteins as a substrate, allowed for the first time the visualisation of two serine proteinases with a molecular weight of 76 and 163kDa from common carp Cyprinus carpio L. seminal plasma. Twenty four hours of incubation in a development solution with a pH of 7.5 and incubation at 37°C were the best conditions for the visualisation of serine proteinase; however, proteolysis was also observed at 4°C. Our results indicate that serine proteinase from common carp seminal plasma with a molecular weight of 76 and 163kDa may be involved in the degradative mechanism of sperm proteins...
September 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28579337/cryopreservation-of-canine-sperm-using-egg-yolk-and-soy-bean-based-extenders
#9
María Jesús Sánchez-Calabuig, Verónica Maillo, Paula Beltrán-Breña, Julio de la Fuente Martínez, Silvestre Galera-Carrillo, José Félix Pérez-Gutiérrez, Serafín Pérez-Cerezales
Animal protein-based extenders are widely used despite being a potential source of bacterial or mycoplasma contamination. Its replacement with vegetal protein-based extenders could represent an interesting alternative for dog sperm cryopreservation. This technique could be further improved by the addition of Tris-Glucose-Citric acid (TGC) that could physically protect the spermatozoa and improve its homeostasis. The aim of this study was to evaluate a cryopreservation protocol for dog spermatozoa using a soybean-based extender (LP1(℗)) as well as the effects of the addition of (TGC) immediately after the semen collection...
September 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28576621/chelating-agents-in-combination-with-rosmarinic-acid-for-boar-sperm-freeze-drying
#10
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/28571680/reproductive-effects-of-irisin-initial-in-vitro-studies
#11
Leonid Poretsky, Julie Islam, Dimiter Avtanski, Yu Kuei Lin, Yi-Ling Shen, Yael Hirth, Martin Lesser, Zev Rosenwaks, Donna Seto-Young
The recently discovered myo- and adipokine irisin affects insulin sensitivity in classical insulin target tissues (adipose tissue, skeletal muscle and liver), but the reproductive effects of this hormone, if any, remain largely unexplored. We hypothesized that irisin may have effects on the hypothalamic-pituitary-gonadal axis. To test this hypothesis, we used murine pituitary mPit12 and human ovarian granulosa cells. GnRH treatment resulted in significant (up to 2.5-fold, p<0.0005) and dose-dependent stimulation of LH production by the mPit12 cells...
September 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28566207/aberrations-in-sperm-dna-methylation-patterns-are-associated-with-abnormalities-in-semen-parameters-of-subfertile-males
#12
Mohammed Laqqan, Erich-Franz Solomayer, Mohamed Hammadeh
Infertility affects about 15% of couples worldwide, with approximately 7% of males suffering from infertility problems. This study was designed to assess the relationship between alterations in sperm DNA methylation patterns and semen parameters in subfertile males. Of a total of 108 males, 30 samples were subjected to 450K BeadChip arrays to evaluate the variation in DNA methylation level between cases and controls. Three CpG sites showed the highest difference in methylation levels (cg09737095, cg14271023, and cg17662493), which are located in the KCNJ5, MLPH, and SMC1β genes, respectively; these were selected for further analysis using deep bisulfite sequencing in 78 independent samples (21 proven fertile "controls", and 57 subfertile "cases")...
September 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28552376/involvement-of-stat1-in-proliferation-and-invasiveness-of-trophoblastic-cells
#13
Francisco Lázaro Pereira de Sousa, Wittaya Chaiwangyen, Diana M Morales-Prieto, Stephanie Ospina-Prieto, Maja Weber, Stella M Photini, Nelson Sass, Silvia Daher, Ekkehard Schleussner, Udo R Markert
Trophoblast proliferation and invasion are controlled by cytokines and growth factors present at the implantation site. Members of the Interleukin-6 (IL-6) family of cytokines trigger their effects through activation of intracellular cascades including the Janus Kinase/Signal Transducer and Activator of Transcription (JAK-STAT) pathway. Functions of several STAT molecules in trophoblast cells have been described, but the role of STAT1 remained unclear. Here, potential functions of STAT1 and its activation by Oncostatin M (OSM) have been investigated in an in vitro model...
September 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28552375/multivitamins-preventive-therapy-against-subclinical-endometritis-in-buffaloes-its-correlation-to-nefa-and-oxidative-stress
#14
Eman A Ahmed, Doaa H Elsayed, Omnia E Kilany, Marwa A El-Beltagy
The current study was designed to elucidate the in vivo antioxidant, preventive, and ameliorating effects of vitamins AD3E on the incidence of subclinical endometritis (SCE) in buffaloes. Twenty-four buffaloes were divided equally into two groups; group I: control and group II: received AD3E combination. Endometrial cytological samples (n=48) were collected using cytobrush to diagnose SCE by counting polymorphonuclear cells (PMN) ≥6% at 5(th) (W5) and≥4% at 7(th) (W7) weeks postpartum. Results revealed that serum superoxide dismutase and nitric oxide significantly increased and decreased, respectively at W7 in AD3E group...
September 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28551031/non-esterified-fatty-acids-in-early-luteal-bovine-oviduct-fluid-mirror-plasma-concentrations-an-ex-vivo-approach
#15
Lies Jordaens, Veerle Van Hoeck, Jessie De Bie, Mario Berth, Waleed F A Marei, Karolien L J Desmet, Peter E J Bols, Jo L M R Leroy
We investigated whether and to which extent plasma non-esterified fatty acids (NEFAs) are reflected in oviduct fluid (OF) using an improved ex vivo flushing method. OF and plasma NEFA concentrations were respectively 0.29±0.19 and 0.31±0.14mmol/L, they didn't differ significantly (P=0.13) and tended to be positively correlated (Pearson correlation coefficient=0.56; P=0.07). Results suggest that OF NEFAs mirror the concentrations seen in plasma of healthy cattle.
September 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28546031/bovine-herpes-virus-type-4-alters-tnf-%C3%AE-and-il-8-profiles-and-impairs-the-survival-of-bovine-endometrial-epithelial-cells
#16
Metasu Chanrot, Gunilla Blomqvist, Yongzhi Guo, Karin Ullman, Mikael Juremalm, Renee Bage, Gaetano Donofrio, Jean-Francois Valarcher, Patrice Humblot
Bovine herpes virus type 4 (BoHV-4) can be transmitted by contaminated semen to cows at the time of breeding and may cause uterine disease. The aim of this study was to characterize the susceptibility of bovine endometrial epithelial cells (bEEC) to BoHV-4 by using an in vitro model. When bEEC were challenged with different multiplicity of infection (MOI; from 0.001 to 10) of BoHV-4 for 6days, a significant decrease in cell survival with increasing MOI was observed. The bEEC were subsequently challenged with BoHV-4 MOI 0...
September 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28532595/impact-of-elemental-iron-on-human-spermatozoa-and-mouse-embryonic-development-in-a-defined-synthetic-culture-medium
#17
Safaa M Naes, Oshini Basri, Fauziah Ismail, Ghofraan A Ata'Allah, Siti Khadijah Idris, Noor Azmi Mat Adenan, Jaffar Ali
There is a paucity of studies on effect of iron in embryo culture procedures. This study aims to ascertain the optimal, tolerance and toxic levels of iron in a protein-free embryo culture medium (PFM) to determine the effect of iron on embryonic development. The application of PFM in assisted reproductive technologies (ART) is intended to eliminate disease transmission and improve ART treatment outcome. The optimal, tolerance and toxic levels of iron on human spermatozoa and mouse embryos were determined by challenging them with different levels of iron (ferric iron; Fe(+3))...
September 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28532594/the-endocrine-disrupting-alkylphenols-and-4-4-ddt-interfere-with-estrogen-conversion-and-clearance-by-mouse-liver-cytosol
#18
Talal El-Hefnawy, Claudia Hernandez, Laura P Stabile
Endocrine disrupting chemicals (EDCs) are ubiquitous compounds known for negative impacts on reproductive functions and for increasing cancer risk. EDCs are believed to cause the harmful effects in part through their inappropriate low-affinity binding to steroid receptors and other possible non-receptor mediated paradigms, however there is a need to further elucidate other mechanisms involving the direct and indirect impact of EDCs on reproductive functions. We examined the metabolism of 17β-estradiol (E2) and estrone (E1) by cell-free hepatic cytosol in the presence of alkylphenols (nonylphenol/NP and 4-tert-octylphenol/tOP), Dichlorodiphenyltrichloroethane (4,4'-DDT) and other EDCs...
September 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28527625/cosmetic-micromanipulation-of-vitrified-warmed-cleavage-stage-embryos-does-not-improve-art-outcomes-an-ultrastructural-study-of-fragments
#19
Somayyeh Safari, Mohammad Ali Khalili, Zeinab Barekati, Iman Halvaei, Morteza Anvari, Stefania A Nottola
The aim was to study the ultrastructure of cytoplasmic fragments along with the effect of cosmetic micromanipulation (CM) on the morphology and development of vitrified-warmed embryos as well as assisted reproductive technology (ART) outcomes. A total of 96 frozen embryo transfer (FET) cycles were included in this prospective randomized study. They were divided into three groups of CM (n=32), sham (n=32) and control (n=32). In the CM group, the vitrified- warmed embryos were subjected to fragments and coarse granules removal (cosmetic micromanipulation) after laser assisted zona hatching (LAH); sham group subjected only to LAH and no intervention was taken for the control group...
September 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28511996/comparative-characteristics-of-spermatozoa-harvested-and-cryopreserved-in-culture-and-cryoprotectant-media-with-or-without-donor-serum-proteins
#20
Ghofraan A Ata'Allah, Noor Azmi Mat Adenan, Nuguelis Razali, Kannappan Palaniappan, Rosliza Saad, Siti Khadijah Idris, Krishnan Kanniah, Jaffar Ali
The objectives of this study is to evaluate the efficacy of protein-free media in the preparation, holding and crypreservation of spermatazoa for use in ART. Normozoospermic semen samples (N=71) were used to compare the effects of media on the survival and quality of spermatozoa when washed and cultured with different media with and without added proteins at 4°C, 15°C, 22°C and 37°C for 0, 4-7 and 24h. Survival and quality of spermatozoa were assessed after freeze-thaw with synthetic cryoprotectant with and without proteins...
May 13, 2017: Reproductive Biology
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