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https://www.readbyqxmd.com/read/28090465/does-intrauterine-injection-of-low-molecular-weight-heparin-improve-the-clinical-pregnancy-rate-in-intracytoplasmic-sperm-injection
#1
Ahmed Mohamed Kamel, Yahia El-Faissal, Mona Aboulghar, Ragaa Mansour, Gamal I Serour, Mohamed Aboulghar
OBJECTIVE: Heparin can modulate proteins, and influence processes involved in implantation and trophoblastic development. This study aimed to assess the improvement of clinical pregnancy and implantation rates after local intrauterine injection of low-molecular-weight heparin (LMWH) in patients undergoing intracytoplasmic sperm injection (ICSI). METHODS: A randomised case/control design was followed in women scheduled for ICSI. The study arm was injected with intrauterine LMWH during mock embryo transfer immediately following the ovum pickup procedure, while the control arm was given an intrauterine injection with a similar volume of tissue culture media...
December 2016: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/28073509/harmful-effects-of-dinophysis-to-the-ciliate-mesodinium-rubrum-implications-for-prey-capture
#2
Luiz L Mafra, Satoshi Nagai, Hajime Uchida, Camila P S Tavares, Bruno P Escobar, Toshiyuki Suzuki
Toxigenic Dinophysis spp. are obligate mixotrophic dinoflagellates that require a constant supply of prey-Mesodinium rubrum-to achieve long-term growth by means of kleptoplasty. Mesodinium rubrum is, however, a fast moving, jumping ciliate exhibiting an effective escape response from suspensivorous predators. In the present study, a series of laboratory experiments evaluating the motility and survival of M. rubrum in the presence of Dinophysis cells and/or substances contained in their culture medium was designed, in order to assess the mechanisms involved in prey capture by Dinophysis spp...
November 2016: Harmful Algae
https://www.readbyqxmd.com/read/28003996/scavenger-receptor-class-b-type-i-a-cd36-related-protein-in-macrobrachium-nipponense-characterization-rna-interference-and-expression-analysis-with-different-dietary-lipid-sources
#3
Zhili Ding, Na Luo, Youqin Kong, Jingfen Li, Yixiang Zhang, Fang Cao, Jinyun Ye
The scavenger receptor class B, type I (SR-BI), is a member of the CD36 superfamily comprising transmembrane proteins involved in mammalian and fish lipid homeostasis regulation. We hypothesize that this receptor plays an important role in Macrobrachium nipponense lipid metabolism. However, little attention has been paid to SR-BI in commercial crustaceans. In the present study, we report a cDNA encoding M. nipponense scavenger receptor class B, type I (designated as MnSR-BI), obtained from a hepatopancreas cDNA library...
2016: International Journal of Genomics
https://www.readbyqxmd.com/read/28000026/pregnancy-outcomes-in-oocyte-recipients-with-fibroids-not-impinging-uterine-cavity
#4
Lena Sagi-Dain, Kamal Ojha, David Bider, Jacob Levron, Viktor Zinchenko, Sharon Walster, Shlomi Sagi, Martha Dirnfeld
OBJECTIVE: To examine the effects of fibroid uterus on pregnancy outcomes and endometrial features in ovum donation recipients. METHODS: Retrospective analysis of 744 ovum donation cycles was conducted in two private IVF centers between 2005 and 2012. All the recipients underwent transvaginal ultrasound examination, including endometrial thickness and grade measurements. Clinical pregnancy, spontaneous miscarriage, and live birth rates were regarded as the primary outcomes...
December 20, 2016: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/27995377/novel-insights-into-the-molecular-mechanism-of-sperm-egg-fusion-via-izumo1
#5
Naokazu Inoue
When a spermatozoon fertilizes an oocyte in mammals, there must be an extremely precise regulation system for successful gamete fusion to occur, which is the final step of fertilization. Using gene-modified animals, IZUMO1 on the sperm side and its receptor, JUNO, on the ovum side, have been unveiled as indispensable factors for triggering membrane fusion. We recently analyzed the detailed molecular machinery of the IZUMO1-JUNO recognition system and clarified the tertiary architecture of the IZUMO1-JUNO complex based on the crystal structure...
December 19, 2016: Journal of Plant Research
https://www.readbyqxmd.com/read/27986819/there-is-no-evidence-that-the-time-from-egg-retrieval-to-embryo-transfer-affects-live-birth-rates-in-a-freeze-all-strategy
#6
K Lattes, M A Checa, R Vassena, M Brassesco, V Vernaeve
STUDY QUESTION: Does the time from ovum pick-up (OPU) to frozen embryo transfer (FET) affect reproductive outcomes in a freeze-all strategy? SUMMARY ANSWER: Our study did not detect statistically significant differences between first and subsequent cycles, clinically relevant differences are not ruled out and further and larger studies are required. WHAT IS KNOWN ALREADY: Following controlled ovarian hyperstimulation (COH) delaying FET until the endometrium has returned to an optimal pre-stimulation state may have a significant emotional impact on patients, which adds to the stress and anxiety accompanying a standard IVF cycle...
December 16, 2016: Human Reproduction
https://www.readbyqxmd.com/read/27938317/cell-viability-of-human-embryonic-stem-cells-stored-for-a-period-of-9-years
#7
Geeta Shroff, Damini Vatsa
OBJECTIVES: Human embryonic stem cells are pluripotent cell lines usually derived from human blastocysts. Their potential critically depends on long-term proliferative capacity, developmental potential after prolonged culture, and karyotypic stability. Cell viability is an important parameter for assessing cell sample quality. Here, we elaborate the stored human embryonic stem cell lines' viability in a ready to use form for a period of 9 years (from 2007 to 2015). MATERIALS AND METHODS: Spare pre implantation stage in vitro fertilized ovum-derived cell lines were cultured in suitable media...
December 12, 2016: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/27932439/management-of-splenic-ectopic-pregnancy-presenting-with-massive-haemoperitoneum
#8
Alissa Greenbaum, Richard Miskimins, Brittany Coffman, Jasmeet Paul
Abdominal ectopic pregnancy (EP) accounts for only 1.3% of EPs and occurs when a fertilised ovum implants in an extrapelvic peritoneal location. Primary splenic pregnancy is a rare type of abdominal EP, with only 16 cases previously reported in the literature. Early diagnosis is essential as delay in treatment carries significant potential for morbidity and mortality. We present the case of a 27-year-old woman presenting with left upper quadrant abdominal pain, elevated human chorionic gonadotropin levels, absence of intrauterine gestational sac and massive haemoperitoneum on transvaginal ultrasound...
December 8, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27909687/morphogenesis-of-human-embryonic-stem-cells-into-mature-neurons-under-in-vitro-culture-conditions
#9
Geeta Shroff
AIM: To describe the morphogenesis of different neuronal cells from the human embryonic stem cell (hESC) line, SCT-N, under in vitro culture conditions. METHODS: The directed neuronal cell line was produced from a single, spare, pre-implantation stage fertilized ovum that was obtained during a natural in vitro fertilization process. The hESCs were cultured and maintained as per our proprietary in-house technology in a Good Manufacturing Practice, Good Laboratory Practice and Good Tissue Practice compliant laboratory...
November 20, 2016: World Journal of Experimental Medicine
https://www.readbyqxmd.com/read/27903344/-a-control-study-of-artificial-oocyte-activation-in-the-same-period
#10
D Y Hao, R Zhang, X Zhang, C Y Shen, Y Yang, W B Wu, Y L Liu, J Liu, J R Zhang, X L Wang
Objective: To compare the fertility rate and embryo outcome between normal fertilization and the use of Calcium ionophore A23187 on the same period of the same cycle of human ovum for artificial activation. Methods: Patients who conducted the intracytoplasmic sperm injection (ICSI) cycle in vitro fertilization assisted reproductive from January 2015 to December in reproductive center of the Third Affiliated Hospital of Zhengzhou University were enrolled.The protocol of this study was approved by the ethics committee of The Third Affiliated Hospital of Zhengzhou University...
November 22, 2016: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/27890351/unilaminar-follicular-cells-transiently-express-galectin-3-during-ovarian-folliculogenesis-in-pigs
#11
Seung-Dam Heo, Changnam Park, Jeongtae Kim, Meejung Ahn, Taekyun Shin
The localization of galectin-3, a β-galactoside-binding animal lectin, was immunohistochemically studied in the ovaries of pigs to determine its expression in ovarian folliculogenesis. Various stages of ovarian follicles were identified in the ovaries of adult pigs. Galectin-3 was immunostained in the squamous follicular cells surrounding oocytes in primordial follicles and in the unilaminar granulosa cells of primary follicles, but not in oocytes of multilaminar follicles (including primary, secondary, and tertiary Graafian follicles)...
November 17, 2016: Tissue & Cell
https://www.readbyqxmd.com/read/27741202/observed-rate-of-down-syndrome-in-twin-pregnancies
#12
Teresa N Sparks, Mary E Norton, Monica Flessel, Sara Goldman, Robert J Currier
OBJECTIVE: To evaluate the observed incidence of Down syndrome in twins compared with that expected based on maternal age-matched singletons, which is the current clinical approach. METHODS: This was a retrospective review of California Prenatal Screening Program participants with expected delivery dates between July 1995 and December 2012. Cases confirmed prenatally or postnatally with a genetic imbalance leading to phenotypic Down syndrome (trisomy 21, mosaic trisomy 21, or translocations) were included...
November 2016: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/27712041/functional-anatomy-of-the-mammalian-sperm-flagellum
#13
REVIEW
Charles B Lindemann, Kathleen A Lesich
The eukaryotic flagellum is the organelle responsible for the propulsion of the male gamete in most animals. Without exception, sperm of all mammalian species use a flagellum for swimming. The mammalian sperm has a centrally located 9 + 2 arrangement of microtubule doublets and hundreds of accessory proteins that together constitute an axoneme. However, they also possess several characteristic peri-axonemal structures that make the mammalian sperm tail function differently. These modifications include nine outer dense fibers (ODFs) that are paired with the nine outer microtubule doublets of the axoneme, and are anchored in a structure called the connecting piece located at the base...
November 2016: Cytoskeleton
https://www.readbyqxmd.com/read/27614633/protein-expression-in-human-cumulus-cells-as-an-indicator-of-blastocyst-formation-and-pregnancy-success
#14
Daniela Paes Almeida Ferreira Braga, Amanda Souza Setti, Edson Guimarães Lo Turco, Fernanda Bertuccez Cordeiro, Elaine Cristina Cabral, Sylvia Sanches Cortezzi, Erika Ono, Rita Cássia Sávio Figueira, Marcos Nogueira Eberlin, Edson Borges
PURPOSE: The goal for the present study was to implement a technique for protein extraction and identification in human cumulus cells (CCs). METHODS: Forty samples of CCs were collected after ovum pick-up from patients undergoing intracytoplasmic sperm injection (ICSI). Samples were split into the blastocyst group (n = 10), including patients in which all embryos converted into blastocysts, and the non-blastocyst group (n = 10), including patients in which none of the embryos reached the blastocyst stage or the positive-pregnancy (n = 10) and negative-pregnancy group (n = 10)...
December 2016: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/27581117/economic-evaluation-of-three-frequently-used-gonadotrophins-in-assisted-reproduction-techniques-in-the-management-of-infertility-in-the-netherlands
#15
Vassilis Fragoulakis, Chris P Pescott, Jesper M J Smeenk, Evert J P van Santbrink, G Jur E Oosterhuis, Frank J M Broekmans, Nikos Maniadakis
BACKGROUND AND OBJECTIVE: Subfertility represents a multidimensional problem associated with significant distress and impaired social well-being. In the Netherlands, an estimated 50,000 couples visit their general practitioner and 30,000 couples seek medical specialist care for subfertility. We conducted an economic evaluation comparing recombinant human follicle-stimulating hormone (follitropin alfa, r-hFSH, Gonal-F(®)) with two classes of urinary gonadotrophins-highly purified human menopausal gonadotrophin (hp-HMG, Menopur(®)) and urinary follicle-stimulating hormone (uFSH, Fostimon(®))-for ovarian stimulation in women undergoing in vitro fertilization (IVF) treatment in the Netherlands...
December 2016: Applied Health Economics and Health Policy
https://www.readbyqxmd.com/read/27568054/short-communication-follicle-superstimulation-before-ovum-pick-up-for-in-vitro-embryo-production-in-holstein-cows
#16
Louise H Oliveira, Carlos P Sanches, Adriano S Seddon, Marcio B Veras, Flávio A Lima, Pedro L J Monteiro, Milo C Wiltbank, Roberto Sartori
The objective was to evaluate in vitro embryo production (IVEP) in nonlactating Holstein cows after ovarian superstimulation. Cows were randomly assigned in a crossover design to 1 of 2 groups: control (n = 35), which was not synchronized and not treated with hormones before ovum pick-up (OPU), or hormone-treated (n = 35), in which wave emergence was synchronized and animals treated with porcine (p)-FSH in the presence of norgestomet before OPU. In the hormone-treated group, all follicles ≥7 mm in diameter were aspirated for synchronization of wave emergence and cows received a norgestomet ear implant...
August 24, 2016: Journal of Dairy Science
https://www.readbyqxmd.com/read/27568041/development-of-insulin-resistance-in-dairy-cows-by-150-days-of-lactation-does-not-alter-oocyte-quality-in-smaller-follicles
#17
L H Oliveira, A B Nascimento, P L J Monteiro, M M Guardieiro, M C Wiltbank, R Sartori
The objective of this study was to test the hypothesis that high-producing dairy cows become increasingly resistant to insulin throughout lactation and that, consequently, oocyte quality is compromised. We used Holstein cows at 50 (51.5 ± 3.7; n = 30), 100 (102.3 ± 9.4; n = 30), and 150 (154.5 ± 18.9; n = 30) days in milk (DIM). We measured circulating insulin and glucose and performed a glucose tolerance test (GTT) after 5 h of fasting. To evaluate oocyte quality, we performed ovum pickup on the day before the GTT (581 oocytes)...
August 24, 2016: Journal of Dairy Science
https://www.readbyqxmd.com/read/27565260/longitudinal-changes-in-maternal-serum-concentrations-of-antim%C3%A3-llerian-hormone-in-individual-women-during-conception-cycles-and-early-pregnancy
#18
Kristina Hamilton, Narelle Hadlow, Peter Roberts, Patricia Sykes, Allison McClements, Jacqui Coombes, Phillip Matson
OBJECTIVE: To study antimüllerian hormone (AMH) from gestation week 0-7. DESIGN: Longitudinal study of 85 pregnant women with AMH and reproductive hormones sampled during conception cycle and early pregnancy until week 7. SETTING: Fertility clinic. PATIENT(S): Of 85 pregnant women, 69 had a singleton pregnancy, 1 a twin pregnancy, and 15 had a nonviable pregnancy (3 chemical pregnancies, 11 miscarriages, and 1 blighted ovum)...
November 2016: Fertility and Sterility
https://www.readbyqxmd.com/read/27559149/differences-in-cumulus-cell-gene-expression-indicate-the-benefit-of-a-pre-maturation-step-to-improve-in-vitro-bovine-embryo-production
#19
Cecilia Dieci, Valentina Lodde, Rémi Labreque, Isabelle Dufort, Irene Tessaro, Marc-André Sirard, Alberto M Luciano
STUDY QUESTION: Does the gene expression profile of cumulus cells (CC) accompanying oocytes with different degrees of chromatin compaction within the germinal vesicle (GV) reflect the oocyte's quality and response in culture during in-vitro embryo production (IVP). SUMMARY ANSWER: The transcriptomic profile of the CC is related to oocyte competence, setting the stage for the development of customized pre-maturation strategies to improve IVP. WHAT IS KNOWN ALREADY: Oocytes complete the acquisition of their competence during antral follicle development...
December 2016: Molecular Human Reproduction
https://www.readbyqxmd.com/read/27557648/formation-and-dissociation-of-sperm-bundles-in-monotremes
#20
Brett Nixon, Heath Ecroyd, Jean-Louis Dacheux, Francoise Dacheux, Valerie Labas, Steve D Johnston, Russell C Jones
As monotremes are the earliest offshoot of the mammalian lineage, the platypus and short-beaked echidna were studied as model animals to assess the origin and biological significance of adaptations considered unique to therian mammals: epididymal maturation and subsequent capacitation. We show that spermatozoa from both species assemble into bundles of approximately 100 cells during passage through the epididymis and that an epididymal protein, secreted protein, acidic, cysteine-rich (osteonectin) (SPARC), is involved in bundle formation...
August 24, 2016: Biology of Reproduction
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