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https://www.readbyqxmd.com/read/28814113/intracytoplasmic-sperm-injection-using-hyaluronic-acid-or-polyvinylpyrrolidone-a-time-lapse-sibling-oocyte-study
#1
Yanhe Liu, Katie Feenan, Vincent Chapple, Peter Roberts, Phillip Matson
This study evaluated the effect of sperm selection and intracytoplasmic sperm injection (ICSI) on subsequent fertilization and embryo development using the hyaluronic acid-based SpermSlow™ (HA-ICSI) compared to injection with polyvinylpyrrolidone (PVP-ICSI). A total of 206 metaphase II oocytes were collected from 21 prospectively enrolled ICSI cycles at Fertility North between July 2014 and March 2015. Sibling oocytes were randomized into HA-ICSI and PVP-ICSI (n = 103 per group). Subsequent fertilization outcomes and embryo development in terms of qualitative and quantitative time-lapse measures following three-day culture in the Embryoscope™ were compared...
August 17, 2017: Human Fertility: Journal of the British Fertility Society
https://www.readbyqxmd.com/read/28811525/totipotency-segregates-between-the-sister-blastomeres-of-two-cell-stage-mouse-embryos
#2
E Casser, S Israel, A Witten, K Schulte, S Schlatt, V Nordhoff, M Boiani
Following fertilization in mammals, it is generally accepted that totipotent cells are exclusive to the zygote and to each of the two blastomeres originating from the first mitotic division. This model of totipotency was inferred from a minority of cases in which blastomeres produced monozygotic twins in mice. Was this due to experimental limitation or biological constraint? Here we removed experimental obstacles and achieved reliable quantification of the prevalence of dual totipotency among mouse two-cell stage blastomeres...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28810691/improvement-of-implantation-potential-in-mouse-blastocysts-derived-from-ivf-by-combined-treatment-with-prolactin-epidermal-growth-factor-and-4-hydroxyestradiol
#3
Miki Takeuchi, Misato Seki, Etsuko Furukawa, Akihito Takahashi, Kyosuke Saito, Mitsuru Kobayashi, Kenji Ezoe, Emiko Fukui, Midori Yoshizawa, Hiromichi Matsumoto
STUDY QUESTION: Can supplementation of medium with prolactin (PRL), epidermal growth factor (EGF) and 4-hydroxyestradiol (4-OH-E2) prior to embryo transfer improve implantation potential in mouse blastocysts derived from IVF? SUMMARY ANSWER: Combined treatment with PRL, EGF and 4-OH-E2 improves mouse blastocyst implantation rates, while alone, each factor is ineffective. WHAT IS KNOWN ALREADY: Blastocyst dormancy during delayed implantation caused by ovariectomy is maintained by continued progesterone treatment in mice, and estrogen injection rapidly activates blastocysts to implantation-induced status in vivo...
August 1, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/28809602/fertility-preservation-and-sexual-health-after-cancer-therapy
#4
Nigel Pereira, Glenn L Schattman
Recent developments in cancer diagnostics and treatments have considerably improved long-term survival rates. Despite improvements in chemotherapy regimens, more focused radiotherapy and diverse surgical options, cancer treatments often have gonadotoxic side-effects that can manifest as loss of fertility or sexual dysfunction, particularly in young cancer survivors. In this review, we focus on two pertinent quality-of-life issues in female cancer survivors of reproductive age-fertility preservation and sexual function...
August 15, 2017: Journal of Oncology Practice
https://www.readbyqxmd.com/read/28808197/effect-of-zeaxanthin-on-porcine-embryonic-development-during-in-vitro-maturation
#5
Seo-Jin Park, Kyoung-Ha So, Sang-Hwan Hyun
Zeaxanthin is a common carotenoid, which is a powerful antioxidant that protects against damage caused by reactive oxygen species. The aim of the present study was to investigate the effects of zeaxanthin supplementation on in vitro maturation of porcine embryo development. We investigated nuclear maturation, intracellular glutathione (GSH), and reactive oxygen species (ROS) levels during in vitro maturation, and subsequent embryonic development following parthenogenetic activation and in vitro fertilization (IVF)...
January 19, 2017: Journal of Biomedical Research
https://www.readbyqxmd.com/read/28807882/control-of-nucleus-positioning-in-mouse-oocytes
#6
REVIEW
Maria Almonacid, Marie-Emilie Terret, Marie-Hélène Verlhac
The position of the nucleus in a cell can instruct morphogenesis in some cases, conveying spatial and temporal information and abnormal nuclear positioning can lead to disease. In oocytes from worm, sea urchin, frog and some fish, nucleus position regulates embryo development, it marks the animal pole and in Drosophila it defines the future dorso-ventral axis of the embryo and of the adult body plan. However, in mammals, the oocyte nucleus is centrally located and does not instruct any future embryo axis. Yet an off-centre nucleus correlates with poor outcome for mouse and human oocyte development...
August 11, 2017: Seminars in Cell & Developmental Biology
https://www.readbyqxmd.com/read/28803373/th2a-is-phosphorylated-at-meiotic-centromere-by-haspin
#7
Masashi Hada, Jihye Kim, Erina Inoue, Yuko Fukuda, Hiromitsu Tanaka, Yoshinori Watanabe, Yuki Okada
Histone phosphorylation is sometimes associated with mitosis and meiosis. We have recently identified a phosphorylation of the 127th threonine on TH2A (pTH2A), a germ cell-specific H2A variant, in condensed spermatids and mitotic early preimplantation embryos of mice. Here, we further report the existence of pTH2A at the centromeres in metaphase I spermatocytes and oocytes. Moreover, we identified Haspin, a known kinase for the 3rd threonine on H3, is responsible for pTH2A in vivo. In contrast to the severe meiotic defect in oocytes treated with a Haspin inhibitor, pTH2A-deficient mice, in which the 127th threonine was replaced by alanine, maintained the fertility and exhibited no obvious defect in both oocytes and spermatogenesis...
August 12, 2017: Chromosoma
https://www.readbyqxmd.com/read/28802113/l-carnitine-enhances-oocyte-maturation-and-improves-in%C3%A2-vitro-development-of-embryos-in-dromedary-camels-camelus-dromedaries
#8
Mohamed Fathi, K H El-Shahat
The aim of the present study was to investigate the effect of L-carnitine (LC) addition during either IVM or IVC on the developmental potential of camel oocytes. In Experiment 1; camel oocytes were matured in the absence (control) or presence of different concentrations of LC (0.25 mg, 0.5 mg, 0.75 mg and 1 mg/ml) for 30 h followed by in vitro fertilization and culture up to blastocyst stage. Our results demonstrated that oocytes treated with 0.5 mg/ml LC showed higher (P < 0.05) rates of maturation (74...
August 4, 2017: Theriogenology
https://www.readbyqxmd.com/read/28802016/involvement-of-sperm-acetylated-histones-and-the-nuclear-isoform-of-glutathione-peroxidase-4-in-fertilization
#9
Simona Pipolo, Rossella Puglisi, Valentina Mularoni, Valentina Esposito, Andrea Fuso, Marco Lucarelli, Maria Teresa Fiorenza, Franco Mangia, Carla Boitani
We previously demonstrated that the nuclear form of Glutathione Peroxidase 4 (nGPx4) has a peculiar distribution in sperm head, being localized to nuclear matrix and acrosome and that sperm lacking nGPx4 are more prone to decondensation in vitro. In this study we have hypothesized that sperm retained acetylated histones and nGPx4 are implicated in paternal chromatin decondensation and male pronucleus formation at fertilization. Indeed, significant higher amounts of acetylated histone H4 and acetylated histone H3 were observed by both immunofluorescence and western blotting in nGPx4-KO sperm vs WT ones...
August 12, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28801637/effect-of-golph3-on-cumulus-granulosa-cell-apoptosis-and-icsi-pregnancy-outcomes
#10
Dianliang Lin, Jing Ran, Suqin Zhu, Song Quan, Baofeng Ye, Aili Yu, Yuefan Kang, Yuan Lin
Previous studies have shown that GOLPH3 mediates cell growth, proliferation and differentiation and inhibits cell apoptosis; however, the role of GOLPH3 in cumulus granulosa cells and the value of GOLPH3 in predicting ICSI pregnancy outcomes remain unknown until now. Our findings showed higher positive expression rate, score of staining intensity, and immunohistochemical score of GOLPH3 in the cumulus granulosa cells of the pregnant women relative to non-pregnant women, and a higher apoptotic rate of cumulus granulosa cells was detected in non-pregnant women than in pregnant women...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28800556/supplementation-of-lycopene-in-maturation-media-improves-bovine-embryo-quality-in%C3%A2-vitro
#11
M M R Chowdhury, Byung-Hyun Choi, Imran Khan, Kyeong-Lim Lee, Ayman Mesalam, Seok-Hwan Song, Lianguang Xu, Myeong-Don Joo, Fahmida Afrin, Il-Keun Kong
This study sought to modulate factors that reduce embryo quality in in vitro culture (IVC) systems. Over eight replicates, 3075 oocytes were cultured in in vitro maturation media containing various concentrations of lycopene, followed by in vitro fertilization and culture. The percentages of MII-stage oocytes, the presumptive zygotes that underwent cleavage and developed into blastocysts were significantly (P < 0.05) higher, the intracellular ROS concentrations reduced significantly (P < 0.05) in oocytes/blastocysts, TUNEL assay demonstrates reduced apoptosis and increased total cell number per blastocyst (P < 0...
August 3, 2017: Theriogenology
https://www.readbyqxmd.com/read/28799257/comparison-of-costs-associated-with-substituting-culture-medium-with-saline-solution-for-follicular-flushing-during-oocyte-retrieval
#12
Dmitry Loktionov, Oladayo Oduola, Jenny Cloherty, Sharon M Warner, Nikhil Purandare
OBJECTIVES: To compare culture medium and saline solution for follicular flushing during oocyte retrieval with assisted reproductive technologies. METHODS: The present retrospective study analyzed data collected at Galway Fertility Clinic, Galway, Ireland, between January 1, 2015, and August 31, 2016; all patients attending the clinic for in vitro fertilization/intracytoplasmic sperm injection during this period were included. Data were stratified by whether follicular flushing was performed with culture medium or saline, and the oocyte yield rate, fertilization rate, embryo utilization rate, and biochemical and clinical pregnancy rates were compared between the groups...
August 11, 2017: International Journal of Gynaecology and Obstetrics
https://www.readbyqxmd.com/read/28796907/likelihood-of-pregnancy-after-embryo-transfer-is-reduced-in-recipient-mares-with-a-short-preceding-oestrus
#13
J Cuervo-Arango, A N Claes, M Ruijter-Villani, T A Stout
BACKGROUND: Previous surveys reported a positive association between the length of the follicular phase and subsequent fertility in embryo transfer donor and Thoroughbred mares. However, it is unclear whether a longer oestrus positively influences fertilisation and oviductal development (oocyte quality, oviductal environment), or uterine receptivity and survival of the embryo in the uterus. OBJECTIVES: To determine the effect of length of oestrus (characterised by duration of endometrial oedema) on likelihood of pregnancy and early embryo loss (EEL) in recipient mares after embryo transfer (ET)...
August 10, 2017: Equine Veterinary Journal
https://www.readbyqxmd.com/read/28796038/clomiphene-citrate-is-associated-with-favorable-cycle-characteristics-but-impaired-outcomes-of-obese-women-with-polycystic-ovarian-syndrome-undergoing-ovarian-stimulation-for-in-vitro-fertilization
#14
Shutian Jiang, Yanping Kuang
The aim of this study was to explore the effect of clomiphene citrate (CC) on the cycle characteristics and outcomes of obese women with polycystic ovarian syndrome (PCOS) undergoing ovarian stimulation for in vitro fertilization (IVF).This is a retrospective cohort study, and it was conducted at the tertiary-care academic medical center.This study included 174 obese PCOS patients undergoing IVF.In the study group (n = 90), CC and human menopausal gonadotropin (HMG) were administered simultaneously beginning on cycle day 3, while in control group (n = 84) HMG was used only...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28795051/predictors-of-live-birth-and-pregnancy-success-after-in-vitro-fertilization-in-infertile-women-aged-40-and-over
#15
Hye Ok Kim, Nayoung Sung, In Ok Song
OBJECTIVE: The aim of this study was to evaluate pregnancy outcomes and the live birth rate at 1-year age increments in women aged ≥40 years undergoing fresh non-donor in vitro fertilization (IVF) and embryo transfer (ET), and to identify predictors of success in these patients. METHODS: This retrospective study was performed among women ≥40 years of age between 2004 and 2011. Of the 2,362 cycles that were conducted, ET was performed in 1,532 (73.1%). RESULTS: The clinical pregnancy rate and live birth rate in women ≥40 years significantly decreased with each year of increased age (p<0...
June 2017: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/28795049/comparison-of-clinical-outcomes-between-in-vitro-fertilization-ivf-and-intracytoplasmic-sperm-injection-icsi-in-ivf-icsi-split-insemination-cycles
#16
Sun Hee Lee, Jae Hyun Lee, Yong-Seog Park, Kwang Moon Yang, Chun Kyu Lim
OBJECTIVE: This study aimed to compare the clinical outcomes between in vitro fertilization (IVF) and intracytoplasmic sperm injection (ICSI) in sibling oocytes. Additionally, we evaluated whether the implementation of split insemination contributed to an increase in the number of ICSI procedures. METHODS: A total of 571 cycles in 555 couples undergoing split insemination cycles were included in this study. Among them, 512 cycles (89.7%) were a couple's first IVF cycle...
June 2017: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/28795048/evaluation-of-human-embryo-development-in-in-vitro-fertilization-and-intracytoplasmic-sperm-injection-fertilized-oocytes-a-time-lapse-study
#17
Hyung Jun Kim, Hye Jin Yoon, Jung Mi Jang, Won Don Lee, San Hyun Yoon, Jin Ho Lim
OBJECTIVE: We investigated whether the insemination method (in vitro fertilization [IVF] or intracytoplasmic sperm injection [ICSI]) affected morphokinetic events and abnormal cleavage events in embryonic development. METHODS: A total of 1,830 normal fertilized embryos were obtained from 272 IVF and ICSI cycles that underwent ovum retrieval culture using a time-lapse system (Embryoscope) from June 2013 to March 2015. All embryos were investigated by a detailed time-lapse analysis that measured the developmental events in the hours after IVF or ICSI insemination...
June 2017: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/28795047/influence-of-the-insemination-method-on-the-outcomes-of-elective-blastocyst-culture
#18
Caizhu Wang, Guixue Feng, Bo Zhang, Jinhui Shu, Hong Zhou, Xianyou Gan, Ruoyun Lin
OBJECTIVE: The aim of this study was to explore the effects of the insemination method on the outcomes of elective blastocyst culture. METHODS: We retrospectively analyzed the outcomes of elective blastocyst culture performed between January 2011 and December 2014. RESULTS: There were 2,003 cycles of conventional in vitro fertilization (IVF) and 336 cycles of intracytoplasmic sperm injection (ICSI), including 25,652 and 4,164 embryos that underwent sequential blastocyst culture, respectively...
June 2017: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/28795046/the-effects-of-different-types-of-media-on-in-vitro-maturation-outcomes-of-human-germinal-vesicle-oocytes-retrieved-in-intracytoplasmic-sperm-injection-cycles
#19
Farzaneh Fesahat, Razieh Dehghani Firouzabadi, Azita Faramarzi, Mohammad Ali Khalili
OBJECTIVE: Optimizing in vitro maturation (IVM) media to achieve better outcomes has been a matter of interest in recent years. The aim of this prospective clinical trial was to investigate the effects of different media on the IVM outcomes of immature oocytes at the germinal vesicle (GV) stage. METHODS: A total of 400 immature oocytes at the GV stage with normal morphology were retrieved from 320 infertile women aged 31±4.63 years during stimulated intracytoplasmic sperm injection (ICSI) cycles...
June 2017: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/28794013/control-mechanisms-in-germ-cells-mediated-by-p53-family-proteins
#20
REVIEW
Jakob Gebel, Marcel Tuppi, Katharina Krauskopf, Daniel Coutandin, Susanne Pitzius, Sebastian Kehrloesser, Christian Osterburg, Volker Dötsch
Germ cells are totipotent and, in principle, immortal as they are the source for new germ cells in each generation. This very special role requires tight quality control systems. The p53 protein family constitutes one of the most important quality surveillance systems in cells. Whereas p53 has become famous for its role as the guardian of the genome in its function as the most important somatic tumor suppressor, p63 has been nicknamed 'guardian of the female germ line'. p63 is strongly expressed in resting oocytes and responsible for eliminating those that carry DNA double-strand breaks...
August 9, 2017: Journal of Cell Science
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