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https://www.readbyqxmd.com/read/28420163/beneficial-effects-of-melatonin-on-the-in-vitro-maturation-of-sheep-oocytes-and-its-relation-to-melatonin-receptors
#1
Xiuzhi Tian, Feng Wang, Lu Zhang, Changjiu He, Pengyun Ji, Jing Wang, Zhenzhen Zhang, Dongying Lv, Wusiman Abulizi, Xuguang Wang, Zhengxing Lian, Guoshi Liu
(1) Background: The binding sites of melatonin, as a multifunctional molecule, have been identified in human, porcine, and bovine samples. However, the binding sites and mechanisms of melatonin have not been reported in sheep; (2) Methods: Cumulus-oocyte complexes (COCs) were cultured in TCM-199 supplemented with melatonin at concentrations of 0, 10(-3), 10(-5), 10(-7), 10(-9), and 10(-11) M. Melatonin receptors (MT1 and MT2) were evaluated via immunofluorescence and Western blot. The effects of melatonin on cumulus cell expansion, nuclear maturation, embryo development, and related gene (GDF9, DNMT1, PTX3, HAS2, and EGFR) expression were investigated...
April 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28419184/mechanisms-for-the-species-difference-between-mouse-and-pig-oocytes-in-their-sensitivity-to-glucorticoids%C3%A2
#2
Shuai Gong, Guang-Yi Sun, Min Zhang, Hong-Jie Yuan, Shuai Zhu, Guang-Zhong Jiao, Ming-Jiu Luo, Jing-He Tan
Although in vitro exposure to physiological concentrations of glucorticoids did not affect maturation of mouse oocytes, it significantly inhibited nuclear maturation of pig oocytes. Studies on this species difference in oocyte sensitivity to glucocorticoids will contribute to our understanding of how stress/glucocorticoids affect oocytes. This study showed that glucorticoid receptors (NR3C1) were expressed in both oocytes and cumulus cells (CCs) of both pigs and mice; however, while cortisol inhibition of oocyte maturation was overcome by NR3C1 inhibitor RU486 in pigs, it could not be relieved by RU486 in mice...
April 17, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/28412286/beneficial-effects-of-glutathione-supplementation-during-vitrification-of-mouse-oocytes-at-the-germinal-vesicle-stage-on-their-preimplantation-development-following-maturation-and-fertilization-in-vitro
#3
Adel R Moawad, Seang Lin Tan, Teruko Taketo
Oocyte cryopreservation is imperative for assisted reproductive technologies (ART). Although cryopreservation of oocytes at the Metaphase II has been widely used, immature oocytes at the germinal vesicle stage (GV-oocytes) need to be cryopreserved in certain situations such as cancer patients; however, the success rate of embryonic development from the GV-oocytes remains low largely due to the requirement for in vitro maturation (IVM). Our aim was to investigate the effects of glutathione (GSH) supplementation during vitrification and warming of mouse GV-oocytes on the preservation of developmental competence...
April 12, 2017: Cryobiology
https://www.readbyqxmd.com/read/28407853/effects-of-environmental-enrichment-on-reproductive-performance-and-quantity-and-morphology-of-cumulus-oocyte-complexes-obtained-from-rattus-norvegicus
#4
Joana Fisch, Iáskara Vieira de Oliveira, Juliana Fank, Lia Mara Gomes Paim, Marília Remuzzi Zandoná, Eliana Franco Lopes, Fernanda Bastos de Mello, Alexandre Tavares Duarte de Oliveira
Several researchers have observed that environmental enrichment (EE) can be effective in reducing stressful conditions and abnormal behavior and may provide better reproductive performance in rodents. In this context, this study aimed to evaluate the reproductive performance of Wistar rats reared in three different housing conditions. Animals were separated into breeding pairs, one pair per cage and pairs randomly assigned to three experimental groups (ten couples per group): control group were provided cages without any environmental enrichment; PVC group with PVC pipe; and cardboard roll group with a commercially available cardboard tube...
May 2017: Theriogenology
https://www.readbyqxmd.com/read/28407308/methods-of-rna-preparation-affect-mrna-abundance-quantification-of-reference-genes-in-pig-maturing-oocytes
#5
Y-K Wang, X Li, Z-Q Song, C-X Yang
To ensure accurate normalization and quantification of target RNA transcripts using reverse transcription quantitative polymerase chain reaction (RT-qPCR), most studies focus on the identification of stably expressed gene(s) as internal reference. However, RNA preparation methods could also be an important factor, especially for test samples of limited quantity (e.g. oocytes). In this study, we aimed to select appropriate reference gene(s), and evaluate the effect of RNA preparation methods on gene expression quantification in porcine oocytes and cumulus cells during in vitro maturation...
April 13, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28406912/the-elusive-maestro-gene-its-human-reproductive-tissue-specific-expression-pattern
#6
Shlomit Kenigsberg, Patricia D A Lima, Leila Maghen, Brandon A Wyse, Chantal Lackan, Annie N Y Cheung, Benjamin K Tsang, Clifford L Librach
The encoded transcript of the Maestro-Male-specific Transcription in the developing Reproductive Organs (MRO) gene exhibits sexual dimorphic expression during murine gonadal development. The gene has no homology to any known gene and its expression pattern, protein function or structure are still unknown. Previously, studying gene expression in human ovarian cumulus cells, we found increased expression of MRO in lean-type Polycystic Ovarian Syndrome (PCOS) subjects, as compared to controls. In this study, we examined the MRO splice variants and protein expression pattern in various human tissues and cells...
2017: PloS One
https://www.readbyqxmd.com/read/28402007/interactions-of-bovine-oocytes-with-follicular-elements-with-respect-to-lipid-metabolism
#7
Ewelina Warzych, Piotr Pawlak, Marcin Pszczola, Adam Cieslak, Zofia E Madeja, Dorota Lechniak
Among many factors, lipid metabolism within the follicular environment emerges as an important indicator of oocyte quality. In the literature a crucial significance is described concerning follicular fluid (FF) composition as well as messenger RNA (mRNA) expression in follicular cells. The aim of this study was to describe the relationship between oocyte, FF and follicular cells with regard to lipid metabolism. The set of data originating from individual follicles comprised: lipid droplets (LD) number in oocytes (BODIPY staining), mRNA expression of seven genes in cumulus and granulosa cells (SCD, FADS2, ELOVL2, ELOVL5, GLUT1, GLUT3, GLUT8; real time polymerase chain reaction) and fatty acid (FA) composition in FF (gas chromatography)...
April 12, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/28394173/sheep-isolated-secondary-follicles-are-able-to-produce-metaphase-ii-oocytes-after-vitrification-and-long-term-in-vitro-growth
#8
Franciele Osmarini Lunardi, Francisco Leo Nascimento de Aguiar, Livia Brunetti Apolloni, Ana Beatriz Graça Duarte, Naiza Arcângela Ribeiro de Sá, Érica Suzanne Soares Leal, Antonia Debora Sales, Carlos Henrique Lobo, Cláudio Cabral Campello, Johan Smitz, Gary Allen Apgar, José Ricardo de Figueiredo, Ana Paula Ribeiro Rodrigues
The vitrification of preantral follicles followed by in vitro growth (IVG) could be valuable to produce fertilizable oocytes. However, the meiotic resumption rates of oocytes cultured from vitrified secondary follicles (SF) have been reported as suboptimal. This study aimed to verify two base media (alpha modification of minimum essential medium, α-MEM, and tissue culture medium 199, TCM199) on vitrified SF regarding different requirements during IVG. Sheep ovarian fragments were divided in six groups: (1) Fresh groups (Control α-MEM and TCM199): SF without vitrification; (2) Follicle-Vitrified (Follicle-Vit α-MEM and TCM199): SF vitrified after isolation; and (3) Tissue-Vitrified (Tissue-Vit α-MEM and TCM199): SF vitrified enclosed in ovarian fragments and, subsequently, isolated...
April 10, 2017: Biopreservation and Biobanking
https://www.readbyqxmd.com/read/28390473/differential-effects-of-high-and-low-glucose-concentrations-during-lipolysis-like-conditions-on-bovine-in-vitro-oocyte-quality-metabolism-and-subsequent-embryo-development
#9
J De Bie, W F A Marei, V Maillo, L Jordaens, A Gutierrez-Adan, P E J Bols, J L M R Leroy
Lipolytic metabolic conditions are traditionally associated with elevated non-esterified fatty acid (NEFA) concentrations, but may also be accompanied by hyperglycaemia in obesity or by hypoglycaemia during a negative energy balance status. Elevated NEFA concentrations disrupt oocyte and embryo development and quality, but little is known about whether the effects of lipolytic conditions on oocyte developmental competence are modulated by glucose availability. To answer this, bovine cumulus-oocyte complexes (COCs) were matured under different conditions: physiological NEFA (72µM) and normal glucose (5...
April 10, 2017: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/28389370/prostaglandin-e2-stimulates-the-expression-of-cumulus-expansion-related-genes-in-pigs-the-role-of-protein-kinase-b
#10
Milan Blaha, Radek Prochazka, Katerina Adamkova, Jan Nevoral, Lucie Nemcova
The production of prostaglandin E2 (PGE2) seems to play an important role in the ovulation process. PGE2 was found to induce cumulus expansion and meiosis resumption in mice, but little is known about its role in pigs. The goals of this study were (a) to assess the effect of PGE2 on the expression levels of cumulus expansion-related genes, (b) to define the signaling pathways that drive the PGE2-stimulated expression of cumulus expansion-related genes, (c) to measure the effect of PGE2 on the activation of key signaling molecules (MAPK3/1, PKB) and on hyaluronan production in cumulus cells, and (d) to assess the effect of PGE2 on meiosis resumption...
April 5, 2017: Prostaglandins & Other Lipid Mediators
https://www.readbyqxmd.com/read/28386814/oocyte-maturation-related-gene-expression-in-the-canine-oviduct-cumulus-cells-and-oocytes-and-effect-of-co-culture-with-oviduct-cells-on-in-vitro-maturation-of-oocytes
#11
Seok Hee Lee, Hyun Ju Oh, Min Jung Kim, Geon A Kim, Yoo Bin Choi, Young Kwang Jo, Erif Maha Nugraha Setyawan, Byeong Chun Lee
PURPOSE: In contrast to most other mammals, canine oocytes are ovulated in an immature state and undergo oocyte maturation within the oviduct during the estrus stage. The aim of the study was to investigate whether oviduct cells from the estrus stage affect the maturation of oocytes and show gene expression patterns related to oocyte maturation. METHODS: We analyzed MAPK1/3, SMAD2/3, and BMP6/15 expression in oviduct cells, cumulus cells, and oocytes from anestrus, estrus, and diestrus stages...
April 6, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28386066/preovulatory-suppression-of-mouse-oocyte-cell-volume-regulatory-mechanisms-is-via-signalling-that-is-distinct-from-meiotic-arrest
#12
Samantha Richard, Jay M Baltz
GLYT1-mediated glycine transport is the main cell volume-homeostatic mechanism in mouse eggs and early preimplantation embryos. It is unique to these developmental stages and key to their healthy development. GLYT1 first becomes activated in oocytes only after ovulation is triggered, when meiotic arrest of the oocyte is released, but how this occurs was unknown. Here we show that GLYT1 activity is suppressed in oocytes in the preovulatory antral follicle and that its suppression is mediated by a mechanism distinct from the gap junction-dependent Natriuretic Peptide Precursor C (NPPC) pathway that controls meiotic arrest...
April 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28385661/intact-cell-maldi-tof-mass-spectrometry-on-single-bovine-oocyte-and-follicular-cells-combined-with-top-down-proteomics-a-novel-approach-to-characterise-markers-of-oocyte-maturation
#13
Valérie Labas, Ana-Paula Teixeira-Gomes, Laura Bouguereau, Audrey Gargaros, Lucie Spina, Aurélie Marestaing, Svetlana Uzbekova
Intact cell MALDI-TOF mass spectrometry (ICM-MS) was adapted to bovine follicular cells from individual ovarian follicles to obtain the protein/peptide signatures (<17kDa) of single oocytes, cumulus cells (CC) and granulosa cells (GC), which shared a total of 439 peaks. By comparing the ICM-MS profiles of single oocytes with CC before and after in vitro maturation (IVM), 71 different peaks were characterised, and their relative abundance was found to vary depending on the stage of oocyte meiotic maturation...
April 3, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28384851/effect-of-antioxidants-%C3%AE-mercaptoethanol-and-cysteamine-on-assisted-reproductive-technology-in-vitro
#14
Mohsen Nikseresht, Mehdi Akbartabar Toori, Hamid Reza Rahimi, Ali Reza Fallahzadeh, Iraj Ragerdi Kahshani, Seyedeh Fatemeh Hashemi, Solmaz Bahrami, Reza Mahmoudi
INTRODUCTION: Oocyte Culture of Germinal Vesicle (GV) and its growth improves Assisted Reproductive Technology (ART) invitro and infertility. Inappropriate culture medium environment, low quality of oocytes, increase in Oxidative Stress (OS) events, Reactive Oxygen Species (ROS) and free radicals production are the main factors that result in unsuccessful Invitro Maturation (IVM) and decrease in reproduction. AIM: The present study was conducted with the aim to evaluate the effect of β-mercaptoethanol (BME) and Cysteamine (CYS) on IVM improvement, embryo fertilization and development of blastocyst of mouse immature oocyte...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28384068/-cell-migration-is-the-ontology-group-differentially-expressed-in-porcine-oocytes-before-and-after-in-vitro-maturation-a-microarray-approach
#15
Wiesława Kranc, Joanna Budna, Adrian Chachuła, Sylwia Borys, Artur Bryja, Marta Rybska, Sylwia Ciesiółka, Ewa Sumelka, Michał Jeseta, Klaus P Brüssow, Dorota Bukowska, Paweł Antosik, Małgorzata Bruska, Michał Nowicki, Maciej Zabel, Bartosz Kempisty
Maturation of cumulus-oocyte complexes (COCs) is crucial for further successful monospermic fertilization, embryo growth, and implantation. All these events are accompanied by proliferation and differentiation of cumulus cells. The migration of COCs to the oviduct after ovulation and the interaction between female gametes and/or embryos with maternal tissues are still poorly recognized on the molecular level. This study was aimed to first demonstrate the mRNA expression profile of cell migration markers during different stages of porcine oocytes maturation and developmental capability in vitro...
April 2017: DNA and Cell Biology
https://www.readbyqxmd.com/read/28383663/transcriptomic-analysis-of-gene-cascades-involved-in-protein-kinase-a-and-c-signalling-in-the-kgn-line-of-human-ovarian-granulosa-tumour-cells1
#16
Patricia G Tremblay, Marc-André Sirard
The developmental competence of an oocyte is its capacity to resume maturation, undergo successful fertilization and reach the blastocyst stage. This competence is acquired through interaction with somatic cells of the follicle. Cumulus and granulosa cells support oocyte development while the oocyte influences follicular cell growth and differentiation. Studies suggest that follicle-stimulating hormone and luteinizing hormone play an essential role in oocyte competence acquisition through signalling initiated by protein kinases A and C (PKA and PKC) in granulosa cells...
April 5, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/28372892/ovarian-tissue-cryopreservation-in-female-to-male-transgender-people-insights-into-ovarian-histology-and-physiology-after-prolonged-androgen-treatment
#17
Chloë De Roo, Sylvie Lierman, Kelly Tilleman, Karen Peynshaert, Kevin Braeckmans, Mirte Caanen, Cornelius B Lambalk, Steven Weyers, Guy T'Sjoen, Ria Cornelissen, Petra De Sutter
Female-to-male transgender people (trans men) are faced with the risk of losing their reproductive potential owing to gender-affirming hormone treatment and genital reconstructive surgery. This observational, prospective cohort study investigates the effect of prolonged androgen therapy on their ovarian histology and fertility preservation perspectives. Hormone serum levels, ovarian histology and cumulus-oocyte complexes (COC) of 40 transsexual men were analysed at the moment of hysterectomy with bilateral oophorectomy in the context of genital reconstructive surgery after testosterone treatment (58...
March 21, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/28370770/expression-of-kit-ligand-and-insulin-like-growth-factor-binding-protein-3-during-in-vivo-or-in-vitro-development-of-ovarian-follicles-in-sheep
#18
D Srividya, V Praveen Chakravarthi, Ssr Kona, Avn Siva Kumar, K V Brahmaiah, V H Rao
Expression of Kit ligand (KL) and insulin-like growth factor binding protein (IGFBP3) genes was studied at different in vivo and corresponding in vitro stages of development of the ovarian follicles in sheep. The expression of both KL and IGFBP3 was significantly higher in the primordial follicles relative to any other stage of development. Compared to the other stages, the KL expression in the cumulus cells from in vivo grown large antral follicles and that of IGFBP3 in COCs' isolated from large antral follicles matured in vitro for 24 hr were significantly higher...
March 31, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28370425/supplementation-with-cumulus-cell-masses-improves-the-in-vitro-meiotic-competence-of-porcine-cumulus-oocytes-complexes-derived-from-small-follicles
#19
R Matsunaga, H Funahashi
The present study was conducted to examine the supplemented effect of cumulus cell masses (CCMs) derived from middle follicle (MF; 3-6 mm diameter) on the morphology and the meiotic or developmental competence of oocytes from small follicles (SF; 1-2 mm diameter). The number of cumulus cells surrounding oocytes just after collection was also lower in cumulus-oocyte complexes (COCs) from SF than MF. The ooplasmic diameter of oocytes was significantly smaller in SF-derived oocytes than MF-derived ones before and after in vitro maturation (IVM), whereas the diameter significantly increased during the culture...
March 30, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28360101/phospholipase-c-related-but-catalytically-inactive-proteins-regulate-ovarian-follicle-development
#20
Miho Matsuda, Masato Hirata
Phospholipase C-related but catalytically inactive proteins PRIP-1 and -2 are inositol-1,4,5-trisphosphate binding proteins that are encoded by independent genes. Ablation of the PRIP genes in mice impairs female fertility, which is manifested by fewer pregnancies, a decreased number of pups, and the decreased and increased secretion of gonadal steroids and gonadotropins, respectively. We investigated the involvement of the PRIPs in fertility, focusing on the ovaries of Prip-1 and -2 double-knockout (DKO) mice...
March 30, 2017: Journal of Biological Chemistry
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