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https://www.readbyqxmd.com/read/29783268/lipidomic-components-alterations-of-human-follicular-fluid-reveal-the-relevance-of-improving-clinical-outcomes-in-women-using-progestin-primed-ovarian-stimulation-compared-to-short-term-protocol
#1
Xiaowei Wen, Yanping Kuang, Lixia Zhou, Baofeng Yu, Qiuju Chen, Yonglun Fu, Zheng Yan, Haiyan Guo, Qifeng Lyu, Jun Xie, Weiran Chai
BACKGROUND Increasing the success rate of in vitro fertilization/intracytoplasmic sperm injection (IVF/ICSI) is a duty of clinicians that has made many seek a variety of protocols. This study was undertaken to use a liquid chromatography-mass spectrometry (LC-MS) to define the alterations of follicular fluid (FF) lipid metabolites in patients undergoing progestin-primed ovarian stimulation (PPOS) compared with short-term protocol, revealing potential correlations between the differentially expressed lipids and ameliorative clinical outcomes...
May 21, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29783047/stroma-cell-derived-factor-1-and-connexins-37-and-43-are-preserved-after-vitrification-and-in-vitro-culture-of-goat-ovarian-cortex
#2
Nathalie Jiatsa Donfack, Kele Amaral Alves, Benner Geraldo Alves, Rebeca Magalhães Pedrosa Rocha, Jamily Bezzera Bruno, Marcelo Bertolini, Regiane Rodrigues Dos Santos, Sheyla Farhaydes Souza Domingues, José Ricardo De Figueiredo, Johan Smitz, Ana Paula Ribeiro Rodrigues
This study aimed to evaluate the follicular morphology and development (follicular activation, cell proliferation, and hormone production), as well as the distribution pattern of Connexins 37 and 43 and SDF-1α after vitrification and in vitro culture of goat ovarian tissue. The study involved four experimental groups: fresh control, vitrified control, fresh culture and vitrified culture. The ovarian fragments were vitrified by a solid surface technique using the Ovarian Tissue Cryosystem and subsequently in vitro cultured for 7 days...
May 12, 2018: Theriogenology
https://www.readbyqxmd.com/read/29782020/whole-mount-immunofluorescence-and-follicle-quantification-of-cultured-mouse-ovaries
#3
Vera D Rinaldi, Jordana C Bloom, John C Schimenti
Research in the field of mammalian reproductive biology often involves evaluating the overall health of ovaries and testes. Specifically, in females, ovarian fitness is often assessed by visualizing and quantifying follicles and oocytes. Because the ovary is an opaque three-dimensional tissue, traditional approaches require laboriously slicing the tissue into numerous serial sections in order to visualize cells throughout the entire organ. Furthermore, because quantification by this method typically entails scoring only a subset of the sections separated by the approximate diameter of an oocyte, it is prone to inaccuracy...
May 2, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29780295/successful-in-vitro-fertilization-and-embryo-transfer-after-transplantation-of-cryopreserved-ovarian-tissue-report-of-the-first-korean-case
#4
Jung Ryeol Lee, Dayong Lee, Soohyeon Park, Eun Chan Paik, Seul Ki Kim, Byung Chul Jee, Chang Suk Suh, Seok Hyun Kim
For patients at risk of premature ovarian failure with cancer treatment, it is an important option to re-implant the ovarian tissue (OT) after cryopreservation to preserve endocrine function and fertility. With this technique, about 30% of pregnancy success rate and about 90 live births have been reported to date. However, there has been no case report of successful in vitro fertilization (IVF) and embryo transfer (ET) with oocytes collected from transplanted cryopreserved OT in Korea. We report a 30-year old woman with rectal cancer who underwent IVF and ET after cryopreserved OT thawing and re-implantation...
May 21, 2018: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/29779474/the-gametotoxic-effects-of-the-endometrioma-content-insights-from-a-parthenogenetic-human-model
#5
Alessio Paffoni, Valentina Bolis, Stefania Ferrari, Laura Benaglia, Paolo Vercellini, Edgardo Somigliana
The present randomized controlled in vitro study was designed to evaluate the effects of the exposure of human cryopreserved oocytes to endometriotic fluid. Twenty-three women aged 36 (4) years donated a total of 147 vitrified supernumerary metaphase II oocytes. Warmed oocytes were randomly assigned to exposure to endometriotic fluid or unexposed control. Thereafter, oocytes were parthenogenetically activated and cultured for up to 5 days. The rate of activation on day 1 and the developmental rates on days 3 and 5 did not significantly differ between the 2 groups...
January 1, 2018: Reproductive Sciences
https://www.readbyqxmd.com/read/29779472/effect-of-body-weight-on-metabolic-hormones-and-fatty-acid-metabolism-in-follicular-fluid-of-women-undergoing-in-vitro-fertilization-a-pilot-study
#6
Laurice Bou Nemer, Haolin Shi, Bruce Richard Carr, Ruth Ann Word, Orhan Bukulmez
INTRODUCTION: Obesity is an epidemic affecting more than one-third of adults in the United States. Obese women experience decreased fertility, explained in part by oocyte quality. Since follicular fluid (FF) provides an important microenvironment for oocyte growth, we sought to evaluate the effect of increased body weight on FF levels of 11 metabolic hormones and fatty acid metabolism. METHODS: The FF was collected from 25 women (10 normal weight, 10 overweight, and 5 obese) with diminished ovarian reserve undergoing in vitro fertilization (IVF) following a minimal stimulation protocol...
January 1, 2018: Reproductive Sciences
https://www.readbyqxmd.com/read/29778923/quantitative-proteomic-profiling-indicates-the-difference-in-reproductive-efficiency-between-meishan-and-duroc-boar-spermatozoa
#7
Li Xinhong, Linqing Zhen, Jieli Fu, Lirui Wang, Qiangzhen Yang, Peifei Li, Yuhua Li
The reproductive efficiency of Meishan pigs is higher than that of Duroc pigs, but the underlying molecular mechanism for this disparity remains unclear. No systematic quantitative proteomics studies, comparing global proteins in Meishan and Duroc boar spermatozoa have been reported. Therefore, we applied iTRAQ labeling coupled with mass spectrometry, and analyzed the differences in proteins between Meishan and Duroc sperm. In the present study, a total of 1597 proteins were quantified. Of these proteins, 190 showed statistically significant fold changes between Meishan and Duroc spermatozoa...
April 30, 2018: Theriogenology
https://www.readbyqxmd.com/read/29778922/interval-of-gonadotropin-administration-for-in-vitro-embryo-production-from-oocytes-collected-from-holstein-calves-between-2-and-6-months-of-age-by-repeated-laparoscopy
#8
Hernan Baldassarre, Luke Currin, Laura Michalovic, Anne-Marie Bellefleur, Karina Gutierrez, Rafael G Mondadori, Werner G Glanzner, Yasmin Schuermann, Rodrigo C Bohrer, Naomi Dicks, Rosalba Lopez, François-Xavier Grand, Christian Vigneault, Patrick Blondin, Jim Gourdon, Vilceu Bordignon
Laparoscopic Ovum Pick-Up (LOPU) in calves followed by in vitro embryo production (IVEP) and transfer (ET) into adult recipients has great potential for accelerated genetic gain through shortening of the generation interval. In this study, 11 Holstein calves were subjected to up to six LOPU procedures between the ages of 2-6 months at 2-3 weeks interval. In all cases, the animals received a CIDR 5 days prior to LOPU and were gonadotropin-stimulated starting at 72 h before LOPU using one of three protocols that were rotated twice among the animals during the study...
May 17, 2018: Theriogenology
https://www.readbyqxmd.com/read/29778554/cumulative-live-birth-rates-after-ivf-in-patients-with-polycystic-ovaries-phenotype-matters
#9
Michel De Vos, Stéphanie Pareyn, Panagiotis Drakopoulos, José M Raimundo, Ellen Anckaert, Samuel Santos-Ribeiro, Nikolaos P Polyzos, Herman Tournaye, Christophe Blockeel
RESEARCH QUESTION: Do cumulative live birth rates (CLBR) vary among women with different polycystic ovary syndrome (PCOS) phenotypes who undergo IVF/intracytoplasmic sperm injection (ICSI) treatment? DESIGN: In this retrospective cohort study, data from 567 patients undergoing an assisted reproductive technology (ART) cycle between January 2010 and December 2015 were collected. Demographical traits, cycle characteristics and clinical and laboratory data were analysed...
May 7, 2018: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/29778392/ultrasound-guided-follicle-aspiration-at-time-of-laparotomy-in-a-patient-with-mayer-rokitansky-k%C3%A3-ster-hauser-syndrome
#10
Ashley M Eskew, Darcy E Broughton, Maureen B Schulte, Kenan R Omurtag, Randall R Odem
OBJECTIVE: To demonstrate a unique case of direct ultrasound-guided follicle aspiration at time of a laparotomy in a patient with Mayer-Rokitansky-Küster-Hauser Syndrome. DESIGN: Video presentation. SETTING: Academic fertility center PATIENT(S): A 32-year-old gravida 0 with Mayer-Rokitansky-Küster-Hauser Syndrome and bilateral ovarian masses presented as a fertility preservation consult from gynecologic oncology due to the possibility of bilateral oophorectomy...
May 2018: Fertility and Sterility
https://www.readbyqxmd.com/read/29778391/matrix-metalloproteinases-and-their-inhibitors-in-human-cumulus-and-granulosa-cells-as-biomarkers-for-oocyte-quality-estimation
#11
Alice Luddi, Martina Gori, Camilla Marrocco, Angela Capaldo, Valentina Pavone, Laura Bianchi, Letizia Boschi, Giuseppe Morgante, Paola Piomboni, Vincenzo de Leo
OBJECTIVE: To study the molecular profile of metalloproteinases and their tissue inhibitors in granulosa and cumulus cells in a subset of fertile and infertile women. DESIGN: Molecular study with granulosa and cumulus cells. SETTING: University hospital. PATIENT(S): Forty-four women undergoing assisted reproductive techniques for female infertility factor, with partners having a normal spermiogram and 15 normally fertile women with male partner affected by severe oligoasthenoteratozoospermia or nonobstructive azoospermia...
May 2018: Fertility and Sterility
https://www.readbyqxmd.com/read/29778389/resveratrol-improves-in-vitro-maturation-of-oocytes-in-aged-mice-and-humans
#12
Mei-Ju Liu, Ai-Gang Sun, Shi-Gang Zhao, Hui Liu, Shui-Ying Ma, Mei Li, Ying-Xue Huai, Han Zhao, Hong-Bin Liu
OBJECTIVE: To evaluate the effects of resveratrol on oocyte maturation in aged mice and humans. DESIGN: Experimental laboratory study. SETTING: University-based reproductive medicine center. PATIENT(S): A total of 64 women 38-45 years of age undergoing intracytoplasmic sperm injection (ICSI) and 48-52-week-old female C57BL/6J mice. INTERVENTION(S): In vitro culture in the presence of three different concentrations of resveratrol (0...
May 2018: Fertility and Sterility
https://www.readbyqxmd.com/read/29776966/loss-of-tigar-induces-oxidative-stress-and-meiotic-defects-in-oocytes-from-obese-mice
#13
Haichao Wang, Qing Cheng, Xiaoyan Li, Feifei Hu, Longsen Han, Hao Zhang, Ling Li, Juan Ge, Xiaoyan Ying, Xuejiang Guo, Qiang Wang
Maternal obesity has been reported to impair oocyte quality in mice, however, the underlying mechanisms remain unclear. In the present study, by conducting a comparative proteomic analysis, we identified a reduced expression of TIGAR protein in ovulated oocytes from high-fat diet (HFD)-fed mice. Specific depletion of TIGAR in mouse oocytes results in the marked elevation of reactive oxygen species (ROS) levels and the failure of meiotic apparatus assembly. Importantly, forced expression of TIGAR in HFD oocytes not only attenuates ROS production, but also partly prevents spindle disorganization and chromosome misalignment during meiosis...
May 18, 2018: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/29775626/microrna-21-up-regulates-metalloprotease-by-down-regulating-timp3-during-cumulus-cell-oocyte-complex-in-vitro-maturation
#14
Bo Pan, Julang Li
Cumulus cells and the remodeling of their extracellular matrix around oocytes are essential for oocyte maturation and ovulation in the ovary. An important extracellular metalloprotease, ADAMTS1, and its partner VERSICAN, mediate essential cumulus-oocyte-complex (COC) structural remodeling. However, how the expression of these proteinases is regulated during oocyte maturation is unclear. Here we report that both ADAMTS1 and VERSICAN significantly increased in porcine cumulus cells during COC in vitro maturation (IVM)...
May 15, 2018: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/29775237/yolk-accumulation-in-an-insect-oocyte
#15
Isabela Ramos
Oocytes are remarkable cells in the matter of accumulating macronutrients. Oviparous animals have evolved to produce germline cells that not only enter meiosis to generate a gamete, but also differentiate into a giant cell designed to support embryo growth. To accomplish that, an oocyte typically grows up to 5,000x its original size by accumulating macromolecules, which are collectively referred to as yolk. This article is protected by copyright. All rights reserved.
May 18, 2018: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/29774951/protein-kinase-c%C3%AE-pkc%C3%AE-involved-in-the-regulation-of-pakt1-ser473-on-the-release-of-mouse-oocytes-from-diplotene-arrest
#16
Lingling Liu, Sen Li, Hanwen Li, Dahai Yu, Chunyu Li, Gensong Li, Yu Cao, Chen Feng, Xin Deng
Defects in meiotic maturation may lead to chromosome segregation errors and genomic instability. Previous reports indicated that protein kinase C delta (PKCδ) may interact with microtubule organizing center-associated protein to play a role on meiotic spindle organization of mammalian oocytes. In this study, we explored the potential role of protein kinase B alpha (PKBα/Akt1), PKCδ, and their relationship on meiotic maturation of mouse oocytes. We examined the expression and localization of pAkt1 (Ser473) and/or pPKCδ (Thr505) under the treatment of SH-6 or Sotrastaurin...
May 18, 2018: Cell Biochemistry and Function
https://www.readbyqxmd.com/read/29774457/vitamin-d-as-a-follicular-marker-of-human-oocyte-quality-and-a-serum-marker-of-in-vitro-fertilization-outcome
#17
Przemysław Ciepiela, Antoni J Dulęba, Ewelina Kowaleczko, Kornel Chełstowski, Rafał Kurzawa
PURPOSE: This study investigated the relationship between the vitamin D [25(OH)D] level in individual follicles and oocyte developmental competence. METHODS: A prospective cohort study in a private infertility center. Infertile women (N = 198) scheduled for intracytoplasmic sperm injection (ICSI) and a single embryo transfer (SET) provided serum samples and 322 follicular fluid (FF) specimens, each from a single follicle on the day of oocyte retrieval. RESULTS: FFs corresponding to successfully fertilized oocytes (following ICSI) contained significantly lower 25(OH)D level compared with those that were not fertilized (28...
May 17, 2018: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/29773519/the-neurosteroid-allopregnanolone-sulfate-inhibits-na-v-1-3-%C3%AE-subunit-containing-voltage-gated-sodium-channels-expressed-in-xenopus-oocytes
#18
Takafumi Horishita, Nobuyuki Yanagihara, Susumu Ueno, Dan Okura, Reiko Horishita, Tomoko Minami, Yuichi Ogata, Yuka Sudo, Yasuhito Uezono, Takashi Kawasaki
The neurosteroid allopregnanolone has potent analgesic effects, and its potential use for neuropathic pain is supported by recent reports. However, the analgesic mechanisms are obscure. The voltage-gated sodium channels (Nav ) α subunit Nav 1.3 is thought to play an essential role in neuropathic pain. Here, we report the effects of allopregnanolone sulfate (APAS) on sodium currents (INa ) in Xenopus oocytes expressing Nav 1.3 with β1 or β3 subunits. APAS suppressed INa of Nav 1.3 with β1 and β3 in a concentration-dependent manner (IC50 values; 75 and 26 μmol/L)...
March 30, 2018: Journal of Pharmacological Sciences
https://www.readbyqxmd.com/read/29772211/synthesis-folding-structure-and-activity-of-a-predicted-peptide-from-the-sea-anemone-oulactis-sp-with-an-shkt-fold
#19
Bankala Krishnarjuna, Jessica Villegas-Moreno, Michela L Mitchell, Agota Csoti, Steve Peigneur, Carlos Amero, Michael W Pennington, Jan Tytgat, Gyorgy Panyi, Raymond S Norton
Sea anemone venom is rich in bioactive compounds, including peptides containing multiple disulfide bridges. In a transcriptomic study on Oulactis sp., we identified the putative 36-residue peptide, OspTx2b, which is an isoform of the KV channel blocker OspTx2a (Sunanda P et al. (2018) Identification, chemical synthesis, structure and function of a new KV 1 channel blocking peptide from Oulactis sp. Peptide Science, in press). As OspTx2b contains a ShK/BgK-like cysteine framework, with high amino acid sequence similarity to BgK, we were interested to investigate its structure and function...
May 14, 2018: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/29772022/binding-of-sulphonylureas-to-plasma-proteins-a-katp-channel-perspective
#20
Peter Proks, Holger Kramer, Elizabeth Haythorne, Frances M Ashcroft
Sulphonylurea drugs stimulate insulin secretion from pancreatic β-cells primarily by inhibiting ATP sensitive potassium (KATP) channels in the β-cell membrane. The effective sulphonylurea concentration at its site of action is significantly attenuated by binding to serum albumin, which makes it difficult to compare in vitro and in vivo data. We therefore measured the ability of gliclazide and glibenclamide to inhibit KATP channels and stimulate insulin secretion in the presence of serum albumin. We used this data, together with estimates of free drug concentrations from binding studies, to predict the extent of sulphonylurea inhibition of KATP channels at therapeutic concentrations in vivo...
2018: PloS One
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