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Oocytes induction

Christine Decanter, Geoffroy Robin, Audrey Mailliez, Julien Sigala, Franck Morschhauser, Nassima Ramdane, Patrick Devos, Didier Dewailly, Brigitte Leroy-Martin, Laura Keller
A lower number of metaphase II oocytes eligible for vitrification after controlled stimulation in cancer patients has recently been reported, suggesting that cancer may impair the dynamics and quality of follicular growth. In this prospective, non-interventional study, the pattern of follicular growth and oocyte cohort after ovarian stimulation in cancer patients was analysed. Ninety cancer patients, recruited before starting chemotherapy, were compared with 180 time- and age-matched healthy controls undergoing intracytoplasmic sperm injection...
February 19, 2018: Reproductive Biomedicine Online
M Chen, H Han, Y Chuai, M Hao, M Shu, W Shang
OBJECTIVE: To report a case series of in vitro fertilization patients with premature ovarian insufficiency, who were treated with oral contraceptives to reduce follicle stimulating hormone levels. METHOD: This was a consecutive case series in a tertiary teaching hospital in China. Twenty-two women with refractory and idiopathic premature ovarian insufficiency were administered a drospirenone/ethinylestradiol oral contraceptive orally. The main outcome measures were the number of oocytes retrieved and the number of embryos frozen...
February 28, 2018: Climacteric: the Journal of the International Menopause Society
Pengfei Li, Jinzhu Meng, Jiongjie Jing, Qingling Hao, Zhiwei Zhu, Jianbo Yao, Lihua Lyu
BACKGROUND: Cocaine-and amphetamine regulated transcript (CART) is an endogenous neuropeptide, which is widespread in animals, plays a key role in regulation of follicular atresia in cattle and sheep. Among animal ovaries, CART mRNA was firstly found in the cattle ovaries. CART was localized in the antral follicles oocytes, granulosa and cumulus cells by immunohistochemistry and in situ hybridization. Further research found that secretion of E2 was inhibited in granulosa cells with a certain dose of CART, the effect depends on the stage of cell differentiation, suggesting that CART could play a crucial role in regulating follicle atresia...
February 26, 2018: Biological Research
Nasrin Saharkhiz, Shahrzad Zademodares, Saghar Salehpour, Sedighe Hosseini, Leyla Nazari, Hatav Ghasemi Tehrani
Background: In this study, the effect of testosterone gel administration during ovulation induction on the fertility rate was examined in women with a poor ovarian response in in vitro fertilization (IVF) cycles. Materials and Methods: The current study is a single-blinded, randomized clinical trial. Patients who met inclusion (Bologna) criteria were placed in the antagonist cycle group. The patients were randomly divided into two groups each included 25 participants treated with a placebo (lubricant gel, the controls) and testosterone gel (intervention)...
2018: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
Mei Lan, Jun Han, Meng-Hao Pan, Xiang Wan, Zhen-Nan Pan, Shao-Chen Sun
Deoxynivalenol (DON) is one of the most prevalent Fusarium mycotoxins in feedstuff and food. DON causes detrimental effects on human and animal reproductive systems by inducing oxidative stress and apoptosis. While melatonin is a multifunctional endogenous hormone which plays crucial roles in the development of animal germ cells and embryos as a robust deoxidizer. In present study, we explored the effects of melatonin on the DON-exposure mouse oocytes. Our in vitro and in vivo results showed that DON adversely affected mouse oocyte maturation and early embryo cleavage, while melatonin administration ameliorated the toxic effects of DON...
February 17, 2018: Journal of Pineal Research
Ronit Beck-Fruchter, Israel Gavish, Shira Baram, Yoel Geslevich, Amir Weiss
OBJECTIVE: Thromboelastography (TEG) is a viscoelastic test of hemostasis which allows measurement of the processes of clot initiation, propagation, stabilization, and dissolution in real time. In this study we aimed to evaluate the alterations in coagulation as measured by TEG during In Vitro Fertilization (IVF) stimulation cycles and to investigate whether final oocyte maturation with recombinant hCG (rhCG) versus GnRH agonist results in a different coagulation state. STUDY DESIGN: This is a prospective observational study which included fifty-three normogonadotrophic women...
February 10, 2018: European Journal of Obstetrics, Gynecology, and Reproductive Biology
Hiroya Kitasaka, Tomoko Kawai, S A Masudul Hoque, Takashi Umehara, Youko Fujita, Masayuki Shimada
It has been known that EGF-like factor secreted from LH-stimulated granuloma cells acts on granulosa cells and cumulus cells to induce ovulation process. Granulosa cells are changed the morphology with differentiating cell functions to produce progesterone. Cumulus cells are detached to make a space between the cells to accumulate hyaluronan rich matrix. LH also changes extracellular matrix (ECM) components including fibronectin in the follicular walls and granulosa cell layers. EGF like factor and fibronectin synergistically play important roles in numerous cell functions, especially cancer cell migration, estimating that fibronectin would impact on granulosa cells and cumulus cells...
2018: PloS One
William H Kutteh, James L Klosky, Daniel M Green, Charlene K Sparrow, Michael A Kutteh, Giles W Robinson, Amar Gajjar
No abstract text is available yet for this article.
February 2, 2018: Journal of Obstetrics and Gynaecology: the Journal of the Institute of Obstetrics and Gynaecology
Süleyman Akarsu, Sibel Demir, Funda Gode, Ahmet Zeki Işık
Objective: The aim of this study was to compare the effect of corifollitropin alfa (CFA) and recombinant follicle-stimulating hormone (rFSH) in poor-responder patients undergoing antagonist cycles. Materials and Methods: The study was a retrospective analysis of the treatment results of 214 poor responder patients who had been admitted to the In Vitro Fertilization Unit of İzmir Medical Park Hospital between November 2014 and November 2016. Intracytoplasmic sperm injections were performed in 38 patients (group 1) with CFA, and the remaining 176 (group 2) with rFSH for controlled ovarian hyperstimulation...
December 2017: Turkish Journal of Obstetrics and Gynecology
Amy L Winship, Jessica M Stringer, Seng H Liew, Karla J Hutt
BACKGROUND: Within the ovary, oocytes are stored in long-lived structures called primordial follicles, each comprising a meiotically arrested oocyte, surrounded by somatic granulosa cells. It is essential that their genetic integrity is maintained throughout life to ensure that high quality oocytes are available for ovulation. Of all the possible types of DNA damage, DNA double-strand breaks (DSBs) are considered to be the most severe. Recent studies have shown that DNA DSBs can accumulate in oocytes in primordial follicles during reproductive ageing, and are readily induced by exogenous factors such as γ-irradiation, chemotherapy and environmental toxicants...
January 25, 2018: Human Reproduction Update
Yi Yang, Han Wu, Xiangjin Kang, Yanhui Liang, Ting Lan, Tianjie Li, Tao Tan, Jiangyun Peng, Quanjun Zhang, Geng An, Yali Liu, Qian Yu, Zhenglai Ma, Ying Lian, Boon Seng Soh, Qingfeng Chen, Ping Liu, Yaoyong Chen, Xiaofang Sun, Rong Li, Xiumei Zhen, Ping Liu, Yang Yu, Xiaoping Li, Yong Fan
Mitochondrial diseases are maternally inherited heterogeneous disorders that are primarily caused by mitochondrial DNA (mtDNA) mutations. Depending on the ratio of mutant to wild-type mtDNA, known as heteroplasmy, mitochondrial defects can result in a wide spectrum of clinical manifestations. Mitochondria-targeted endonucleases provide an alternative avenue for treating mitochondrial disorders via targeted destruction of the mutant mtDNA and induction of heteroplasmic shifting. Here, we generated mitochondrial disease patient-specific induced pluripotent stem cells (MiPSCs) that harbored a high proportion of m...
January 9, 2018: Protein & Cell
Abolfazl Shirazi, Arefeh Golestanfar, Masomeh Bashiri, Ebrahim Ahmadi, Naser Shams-Esfandabadi
Background: Failure of Male Pronucleus (MPN) formation is a major concern in the success of Intracytoplasmic Sperm Injection (ICSI) in some species. Despite the conducted unsuccessful efforts to improve ICSI efficiency in ovine, the present study was aimed to improve MPN formation and embryo development in ovine ICSI procedure through accompaniment of sperm pretreatment with co-injection of some compounds. Methods: In experiment 1, sperm were treated with either 2-mercaptoethanol (2ME), glutathione (GSH), or DTT (dithiothreitol) in combination with Heparin (Hep)...
January 2018: Avicenna Journal of Medical Biotechnology
Richard Behringer, Marina Gertsenstein, Kristina Vintersten Nagy, Andras Nagy
For experiments that require large numbers of preimplantation mouse embryos, such as microinjection of zygotes, gonadotropins are administered to females before mating to increase the number of oocytes that are ovulated (i.e., to induce superovulation). Pregnant mare serum gonadotropin (PMSG) is used to mimic the oocyte maturation effect of the endogenous follicle-stimulating hormone (FSH), and human chorionic gonadotropin (hCG) is used to mimic the ovulation induction effect of luteinizing hormone (LH).
January 2, 2018: Cold Spring Harbor Protocols
Tomomi Sato, Hannah Kim, Hanako Kakuta, Taisen Iguchi
BACKGROUND/AIM: Neonatal diethylstilbestrol (DES) treatment induces polyovular follicles (PFs), which contain more than two oocytes in a follicle, through estrogen receptor (ER) β, not ERα. 2,3-Bis(4-hydroxyphenyl)-propionitrile (DPN) is a specific ERβ agonist; the effects of neonatal DPN exposure on PF induction and gene expression in the mouse ovary were examined. MATERIALS AND METHODS: Histological analysis and real-time reverse transcription-polymerase chain reaction were performed...
January 2018: In Vivo
Narae Kim, Naojiro Minami, Masayasu Yamada, Hiroshi Imai
Aim: One of the parameters that greatly affects homeostasis in the body is the pH. Regarding reproductive biology, germ cells, such as oocytes or sperm, are exposed to severe changes in pH, resulting in dramatic changes in their characteristics. To date, the effect of the pH has not been investigated regarding the reprogramming of somatic cells and the maintenance and differentiation of pluripotent stem cells. Methods: In order to investigate the effects of the pH on cell culture, the methods to produce induced pluripotent stem cells (iPSCs) and to differentiate embryonic stem cells (ESCs) into mesendoderm and neuroectoderm were performed at each medium pH from 6...
January 2017: Reproductive Medicine and Biology
Ana Josefina AriasTorres, José Bernardino Páez, Liliana Isabel Zelarayán
In this work, we describe the participation of the Adenylate cyclase/3'-5'-cyclic adenonsine monophosphate (cAMP) pathway in the seasonal follicular secretion of progesterone (P4 ) and testosterone (T), and its relationship with the maturation of Rhinella arenarum oocytes. Under gonadotropin stimulation, P4 secretion was the dominant steroid produced during the reproductive period, resulting in 100% germinal vesicle breakdown (GVBD) in oocytes in vitro; in contrast, T and estradiol (E2 ) secretion increased (∼16 nM/20 follicles and ∼80 pM/20 follicles, respectively) during the non-reproductive period, but only yielded 50% GVBD...
December 16, 2017: Molecular Reproduction and Development
Xiangqin Zheng, Danmei Lin, Yulong Zhang, Yuan Lin, Jianrong Song, Suyu Li, Yan Sun
OBJECTIVE: Pretreatment of myoinositol is a very new method that was evaluated in multiple small studies to manage poor ovarian response in assisted reproduction. This study was to determine the efficacy of myoinositol supplement in infertile women undergoing ovulation induction for intracytoplasmic sperm injection (ICSI) or in vitro fertilization embryo transfer (IVF-ET). METHODS: A meta-analysis and systematic review of published articles evaluating the efficacy of myo-inositol in patients undergoing ovulation induction for ICSI or IVF-ET was performed...
December 2017: Medicine (Baltimore)
Chien-Hsun Huang, Wen-Hsiung Chan
The mycotoxin citrinin (CTN), a natural contaminant in foodstuffs and animal feeds, exerts cytotoxic and genotoxic effects on various mammalian cells and embryos. A previous investigation by our group revealed potentially hazardous effects of CTN on mouse oocyte maturation and pre- and post-implantation embryo development via the induction of apoptosis. The present study showed that CTN induces apoptosis and inhibits cell proliferation in the inner cell mass of mouse blastocysts. Notably, we observed for the first time that both these effects are suppressed by liquiritigenin (LQ)...
November 27, 2017: International Journal of Molecular Sciences
Yafei Xu, Scot M Hutchison, José J Hernández-Ledezma, Randy L Bogan
STUDY QUESTION: Does 27-hydroxycholesterol (27OH) actively facilitate the progression of luteolysis? SUMMARY ANSWER: There is increased mRNA expression of the enzyme that produces 27OH during luteolysis in vivo in rhesus macaques and sheep, and 27OH reduces progesterone secretion from human luteinized granulosa cells. WHAT IS KNOWN ALREADY: There is an increase in mRNA expression of liver x receptor (LXR) and a decrease in sterol regulatory element binding protein 2 (SREBP2) target genes during spontaneous luteolysis in primates, which could result in reduced cholesterol availability for steroidogenesis...
January 1, 2018: Molecular Human Reproduction
Robabeh Taheripanah, Marzieh Zamaniyan, Atefeh Moridi, Anahita Taheripanah, Narges Malih
Background: The purpose of triggering in ovulation induction is to induce the final maturation of oocytes and their release from the ovary for fertilization. Objective: The aim of the present study was to compare the effectiveness of gonadotropin-releasing hormone (GnRH) agonist and human chorionic gonadotropin (HCG) on the final maturation of oocytes and pregnancy rates in intrauterine insemination (IUI) cycles. Materials and Methods: In this randomized clinical trial, 110 infertile women who were selected for IUI entered the study...
June 2017: International Journal of Reproductive Biomedicine (Yazd, Iran)
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