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Reproductive Biology

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https://www.readbyqxmd.com/read/29108863/alterations-in-sperm-dna-methylation-patterns-of-oligospermic-males
#1
Mohammed Laqqan, Sascha Tierling, Yaser Alkhaled, Christina LoPorto, Mohamad Eid Hammadeh
Aberrant in sperm DNA methylation patterns and histone modification play a role in male fecundity decline. This study was prepared to determine whether sperm DNA methylation at CpG dinucleotides is different in oligospermic males compared to proven fertile males and then to evaluate the correlation between the changes in sperm DNA methylation patterns and semen parameters of oligospermic males. A total of 165 males (64 proven fertile males "controls" and 101 oligospermic males "cases") were included in the study...
November 3, 2017: Reproductive Biology
https://www.readbyqxmd.com/read/29102762/immunoglobulins-from-sera-of-aps-patients-bind-htr-8-svneo-trophoblast-cell-line-and-reduce-additional-mediators-of-cell-invasion
#2
Milica Jovanović Krivokuća, Tamara Abu Rabi, Ivana Stefanoska, Svetlana Vrzić-Petronijević, Miloš Petronijević, Ljiljana Vićovac
Immunoglobulins from sera of patients with antiphospholipid syndrome (APS) decrease trophoblast cell invasion in vitro. This study aimed to extend understanding of cellular effects of immunoglobulins from APS (aPL+) in HTR-8/SVneo cells. aPL+ IgG induced change in effector molecules important for cell invasion was investigated further. After 1h of culture 21% cells bound aPL+ IgG, as opposed to 6% in control (aPL-). This was accompanied by increase in phospho-p38 at 30min. After 24h treatment aPL+IgG decreased protein levels of integrin subunits α1 (78% of control; p<0...
November 1, 2017: Reproductive Biology
https://www.readbyqxmd.com/read/29100724/expression-of-the-gm2-activator-protein-in-mouse-testis
#3
Yu-Teh Li, Su-Chen Li, I-Li Chen
The GM2-activator protein (GM2-AP), revealed by Li et al. in 1973 in human liver, was initially identified as a protein cofactor that stimulated β-hexosaminidase A to hydrolyze N-acetylgalactosamine from GM2 ganglioside. This cofactor was found to be missing in human variant AB Tay-Sachs disease. Over the years, the GM2-AP has also been shown to be involved in kidney vesicular transport, lipid presentation by CD1 molecule to T-cells, and interaction of human sperm with zona pellucida. Since the expression of the GM2-AP via mRNA detection in mouse tissues was found to be the highest in testis, we became interested in the localization of the GM2-AP at cellular level in mouse testis during spermatogenesis...
October 31, 2017: Reproductive Biology
https://www.readbyqxmd.com/read/29097083/knockdown-of-melatonin-receptor-1-and-induction-of-follicle-stimulating-hormone-on-the-regulation-of-mouse-granulosa-cell-function
#4
Hira Sajjad Talpur, Tesfaye Worku, Zia Ur Rehman, Rahim Dad, Dinesh Bhattarai, Iqra Bano, Farmanullah, Aixin Liang, Changjiu He, Liguo Yang
Melatonin receptor 1 (MT1) performs a critical role in the regulation of the animal reproductive system, particularly in follicular growth, and has a considerable effect on reproductive performance. However, the role that MT1 plays in regulating hormones associated with reproduction remains unclear. This study was designed to examine the physiological role of constitutive MT1 silencing and follicle stimulating hormone (FSH) treatment in reproduction, making use of mouse granulosa cells (mGCs) as a model. To understand the constitutive role of MT1 in ovarian physiology, the RNAi-Ready pSIREN-RETROQ-ZsGreen Vector mediated recombinant pshRNA was used to silence MT1 gene expression...
October 30, 2017: Reproductive Biology
https://www.readbyqxmd.com/read/29089199/microrna-27a-3p-affects-estradiol-and-androgen-imbalance-by-targeting-creb1-in-the-granulosa-cells-in-mouse-polycytic-ovary-syndrome-model
#5
Mingming Wang, Mei Liu, Jing Sun, Lina Jia, Shuoqian Ma, Jun Gao, Yunyun Xu, Hongwen Zhang, Suk Ying Tsang, Xiangdong Li
Polycystic ovary syndrome (PCOS) is a common endocrine abnormality in women characterized by a menstrual disturbance with chronic anovulation and hyperandrogenism, polycystic ovaries, and insulin resistance. MicroRNAs (miRNAs) are important fine-tune regulators involved in various physiological and pathological processes, but their actions are not fully understood. In this study, we observed the increased expression of miR-27a-3p in the ovaries of mice with PCOS and explored its functions in primary mouse granulosa cells (mGCs) and the mouse granulosa-like tumor cell line, KK-1, using several approaches...
October 28, 2017: Reproductive Biology
https://www.readbyqxmd.com/read/29055788/nitric-oxide-malondialdheyde-and-non-enzymatic-antioxidants-assessed-in-viable-spermatozoa-from-selected-infertile-men
#6
Elena Moretti, Giulia Collodel, Anna Ida Fiaschi, Lucia Micheli, Francesca Iacoponi, Daniela Cerretani
There are growing evidences that the semen of infertile male population shows higher reactive oxygen species (ROS) levels concomitant with lower antioxidant capacity compared to those detected in semen of fertile population. The plasma membrane of the sperm cell, which has high levels of polyunsaturated fatty acids, renders it particularly sensitive to ROS. The aim of this study was to compare the sperm parameters (concentration, motility, morphology and vitality) and the levels of malondialdehyde (MDA), as marker of lipid peroxidation (LPO), nitric oxide (NO), ascorbic acid (AA), total (GSHt) and oxidized glutathione (GSSG) in viable sperm in a group of 38 infertile patients and in a group of 55 control subjects with unknown reproductive potential...
October 18, 2017: Reproductive Biology
https://www.readbyqxmd.com/read/29031924/evaluation-of-cervical-mucus-and-reproductive-efficiency-of-seasonally-anovular-dairy-goats-after-short-term-progestagen-based-estrous-induction-protocols-with-different-gonadotropins
#7
Jeferson F Fonseca, Joanna M G Souza-Fabjan, Maria Emilia F Oliveira, Renata C Cruz, Luciana V Esteves, Maria Pia S L Matos de Paiva, Felipe Z Brandão, Antônio B Mancio
The use of three different gonadotropins was tested for estrous induction in dairy goats during the non-breeding season. All does received an injection of 30 μg of d-cloprostenol and intravaginal sponges containing 60mg of medroxyprogesterone acetate (MAP) for 6 d plus 20 IU of porcine FSH (pFSH), 200 IU of eCG or 250 IU of hCG 24h before sponge removal. In Experiment 1 (n=24), ovarian ultrasound parameters were recorded and cervical mucus was evaluated daily for 5 d after sponge removal or until ovulation...
October 11, 2017: Reproductive Biology
https://www.readbyqxmd.com/read/29030127/a-method-for-the-isolation-and-enrichment-of-purified-bovine-milk-exosomes
#8
Kanchan Vaswani, Yong Qin Koh, Fatema B Almughlliq, Hassendrini N Peiris, Murray D Mitchell
Exosomes are nanovesicles that play important roles in intercellular communication as they carry information to target cells. Isolation of high purity exosomes will aid in studying the exosomal cargo and quantity as well as how cell-specific messages are carried. We describe a new method incorporating size exclusion chromatography (SEC) to enrich milk-derived exosomes from extracellular vesicles (EVs). This involved the initial isolation of EVs from bovine milk via milk processing and ultracentrifugation; followed by a new method to enrich exosomes using SEC...
October 10, 2017: Reproductive Biology
https://www.readbyqxmd.com/read/29030126/the-pesticide-lindane-induces-dose-dependent-damage-to-granulosa-cells-in-an-in-vitro-culture
#9
Maria Grazia Palmerini, Gulmira Zhurabekova, Aru Balmagambetova, Stefania Annarita Nottola, Selenia Miglietta, Manuel Belli, Serena Bianchi, Sandra Cecconi, Valentina Di Nisio, Giuseppe Familiari, Guido Macchiarelli
Lindane, which is one of the most persistent organochlorine pesticide contaminating the Aral Sea region, is associated with numerous pathologies of the female reproductive system, including infertility, due to its gap junction blocker activity. By using an in vitro model of reproductive toxicity consisting of mouse parietal granulosa cells (GCs) exposed to increasing concentrations of Lindane ranging from 1 to 100μM (L1; L10; L100), we aimed to ascertain the Lindane toxicity by evaluating the ultrastructure and expression of the cell death protein p53...
October 10, 2017: Reproductive Biology
https://www.readbyqxmd.com/read/29030125/prolactin-gene-expression-in-the-pituitary-of-rats-subjected-to-vaginocervical-stimulation-requires-erk-1-2-signaling
#10
Patricia Reuquen, Emanuel Guajardo-Correa, María L Oróstica, Constanza Curotto, Alexis Parada-Bustamante, Hugo Cardenas, Pedro A Orihuela
Vaginocervical stimulation (VCS) induces twice-daily prolactin (PRL) surges resulting in pseudopregnancy in the rat. Furthermore, activation of the extracellular signal-regulated kinase-1/2 (Erk-1/2) is involved in the effect of estradiol (E2) on the Prl gene expression in pituitary cells. Herein, we investigated whether Erk-1/2 signaling is involved in the control of Prl expression in the pituitary of VCS rats and whether VCS regulates the effect of E2 on Erk-1/2 and Prl in the pituitary. Estrous rats were assigned as control or VCS groups and 0, 6, 12 or 24h later the levels and localization of phosphorylated Erk-1/2 (p-Erk-1/2) were analyzed in the pituitary...
October 10, 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28988892/the-il-1%C3%AE-signalling-pathway-and-its-role-in-regulating-pro-inflammatory-and-pro-labour-mediators-in-human-primary-myometrial-cells
#11
Martha Lappas
Interleukin (IL)-1β plays a central role in the processes of human labour and delivery. The adaptor proteins involved in the IL-1β signalling pathway in human myometrium are not known. This study sought to determine the role of the adaptor proteins myeloid differentiation primary response 88 (MyD88), tumour necrosis factor receptor-associated factor 6 (TRAF6), IL-1 receptor-associated kinase 4 (IRAK4) and transforming growth factor beta-activated kinase 1 (TAK1) in IL-1β-induced formation of pro-inflammatory and pro-labour mediators in human myometrium...
October 6, 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28986276/expression-and-localization-of-relaxin-family-peptide-receptor-4-in-human-spermatozoa-and-impact-of-insulin-like-peptide-5-on-sperm-functions
#12
Imaneh Shamayeli Yeganeh, Amir Hossein Taromchi, Fatemeh Fadaei Fathabadi, Reza Nejatbakhsh, Marefat Ghaffari Novin, Saeed Shokri
Insulin-like peptide 5 (INSL5) is a member of the insulin superfamily peptide that interacts with the relaxin family peptide receptor 4 (RXFP4). Numerous recent studies have focused on the functional effects of INSL5 on fat and glucose metabolism. Although there is no evidence that the human sperm may be a candidate target of INSL5, it has been detected in mice testis and sperm. Therefore, the present study sought to analyze the localization and expression of RXFP4 on human sperm and determine the efficiency of INSL5 in human sperm...
October 4, 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28935119/effects-of-cdk-inhibitors-on-the-maturation-transcription-and-mpf-activity-of-porcine-oocytes
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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