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https://www.readbyqxmd.com/read/27913778/effect-of-deslorelin-acetate-treatment-in-oocyte-recovery-and-in-vitro-embryo-production-in-domestic-cats
#1
Camila Louise Ackermann, Eduardo Trevisol, Leticia Ferrari Crocomo, Tatiana da Silva Rascado, Rodrigo Volpato, Carlos Renato de Freitas Guaitolini, Carlize Lopes, Talita de Almeida Costa, Maria Denise Lopes
OBJECTIVES: The present study investigated the effect of contraceptive treatment with deslorelin acetate on in vitro embryo production and oocyte recovery in domestic queens. METHODS: Twenty-one mature domestic cats were used. Eleven queens (treated group) and one tom were kept in an experimental cattery, and 10 queens were privately owned (control group). When in interestrus or diestrus (day 0) a deslorelin acetate implant (Suprelorin, 4.7 mg/animal) was inserted into the subcutaneous tissue of the interscapular region in all queens in the treated group...
December 2, 2016: Journal of Feline Medicine and Surgery
https://www.readbyqxmd.com/read/27908842/role-of-versican-and-adamts-1-in-polycystic-ovary-syndrome
#2
Sibel Özler, Efser Öztaş, Aytekin Tokmak, Merve Ergin, Meryem Pekcan Kuru, Başak Güler Gümüş, Halil İbrahim Yakut, Nafiye Yılmaz
OBJECTIVE: Background: ADAMTS-1 is a matrix metalloproteinase which cleaves versican in the cumulus oocyte complex, under the effect of luteinizing hormone surge in the periovulatory period. Altered levels of it may have a role in the disease pathogenesis. OBJECTIVE: We aimed to detect serum versican and a disintegrin and metalloproteinase with thrombospondin motif- 1 (ADAMTS-1) levels in polycystic ovary syndrome (PCOS) patients, and compare the results with the healthy controls...
December 2, 2016: Journal of Clinical Research in Pediatric Endocrinology
https://www.readbyqxmd.com/read/27908686/effect-of-different-vitrification-solutions-and-cryodevices-on-viability-and-subsequent-development-of-buffalo-oocytes-vitrified-at-the-germinal-vesicle-gv-stage
#3
Amr S El-Shalofy, Adel R Moawad, Gamal M Darwish, Sayed T Ismail, Aly B A Badawy, Magdy R Badr
The cryopreservation of immature oocytes would generate a readily available, non-seasonal source of female gametes for research and reproduction. In domestic animals, the most promising results on oocyte cryopreservation have been reported in cattle, few studies have been conducted on buffalo. The aim of the present study was to compare the use of different vitrification solutions and various cryodevices on viability and developmental competence of buffalo oocytes vitrified at the germinal vesicle (GV) stage...
November 28, 2016: Cryobiology
https://www.readbyqxmd.com/read/27905503/advancing-ovarian-folliculometry-with-selective-plane-illumination-microscopy
#4
Hsiao-Chun Amy Lin, Rahul Dutta, Subhamoy Mandal, Alexander Kind, Angelika Schnieke, Daniel Razansky
Determination of ovarian status and follicle monitoring are common methods of diagnosing female infertility. We evaluated the suitability of selective plane illumination microscopy (SPIM) for the study of ovarian follicles. The large field of view and fast acquisition speed of our SPIM system enables rendering of volumetric image stacks from intact whole porcine ovarian follicles, clearly visualizing follicular features including follicle volume and average diameter (70 μm-2.5 mm), their spherical asymmetry parameters, size of developing cumulus oophorus complexes (40 μm-110 μm), and follicular wall thickness (90 μm-120 μm)...
December 1, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27905152/the-effect-of-cumulus-cells-on-domestic-cat-felis-catus-oocytes-during-in-vitro-maturation-and-fertilization
#5
N Sowińska, K Frankowska, A Filipczyk, A Adamaszek, K Nalik, K Fic, A Pietsch-Fulbiszewska
The aim of this study was to evaluate the effect of co-culture of denuded oocytes with cumulus cells (CC) or cumulus-oocyte complexes (COCs) on in vitro maturation (IVM) and in vitro fertilization (IVF). Immature oocytes were collected from ovaries of domestic cats following a routine ovariectomy. Oocytes were matured in vitro for 24 hr within four groups: (i) denuded oocytes (DO), (ii) DO co-cultured with CC, (iii) DO co-cultured with COC and (iv) COC as a control group. In further experiments, COCs were matured in vitro for 24 hr, and then, oocytes were randomly divided into four groups as previously described and fertilized in vitro...
November 30, 2016: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/27898841/rapid-communication-nerve-growth-factor-influences-cleavage-rate-and-embryo-development-in-sheep
#6
M Crispo, P C Dos Santos-Neto, M Vilariño, A P Mulet, A de León, L Barbeito, A Menchaca
Recent information about Nerve growth factor (NGF), a protein traditionally associated to the nervous system that regulates survival and maturation of developing neurons, suggests that it may exert action also on different levels in the reproductive system. The aim of this study was to evaluate the effect of NGF added during in vitro oocyte maturation, fertilization or in vitro embryo development in sheep. Nerve growth factor was supplemented to the culture medium at 0, 100, or 1,000 ng/mL, during either in vitro maturation (Exp...
October 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27890905/bone-morphogenetic-protein-1-is-expressed-in-porcine-ovarian-follicles-and-promotes-oocyte-maturation-and-early-embryonic-development
#7
Xiaocan Lei, Kuiqing Cui, Xiaoyan Cai, Yanping Ren, Qingyou Liu, Deshun Shi
In the present study, we tried to determine whether bone morphogenetic protein 1 (BMP1) plays a role in ovarian follicular development and early embryo development. We systematically investigated the expression and influence of BMP1 during porcine follicle and early embryonic development. Immunohistochemistry demonstrated that the BMP1 protein is expressed in granular cells and oocytes during follicular development, from primary to pre-ovulatory follicles, including atretic follicles and the corpus luteum. The mRNA expression of BMP1 significantly increased as the porcine follicles grew...
November 25, 2016: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/27889868/biobanking-of-different-body-fluids-within-the-frame-of-ivf-a-standard-operating-procedure-to-improve-reproductive-biology-research
#8
Michael Schenk, Berthold Huppertz, Barbara Obermayer-Pietsch, Darja Kastelic, Martina Hörmann-Kröpfl, Gregor Weiss
PURPOSE: The aim of the present study was to develop a standard operating procedure (SOP) for the collection, transport, and storage of human cumulus cells, follicular fluid, blood serum, seminal plasma, embryo culture supernatant, and embryo culture supernatant control obtained within the IVF process under approved protocols and written informed consent from participating patients. The SOP was developed at the Kinderwunsch Institut Schenk, Dobl, Austria, together with Biobank Graz of the Medical University of Graz, Austria...
November 26, 2016: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/27885726/cryopreservation-of-feline-oocytes-by-vitrification-using-commercial-kits-and-slush-nitrogen-technique
#9
L Fernandez-Gonzalez, K Jewgenow
Assisted reproductive techniques are a valuable tool for conservation breeding of endangered species. Cryopreservation methods are the basis of gamete banks, supporting genetic diversity preservation. Unfortunately, cryopreservation of feline oocytes is still considered an experimental technique. The aim of this study was to compare two commercial kits, with our protocol for vitrification of cat oocytes (IZW), which comprises a three-step method with ethylene glycol, DMSO, fetal calf serum, trehalose and Ficoll PM-70...
November 24, 2016: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/27882695/effects-of-polyethylene-glycol-and-a-synthetic-ice-blocker-during-vitrification-of-immature-porcine-oocytes-on-survival-and-subsequent-embryo-development
#10
Elisa Caroline da Silva Santos, Tamas Somfai, Ruth Appeltant, Thanh Quang Dang-Nguyen, Junko Noguchi, Hiroyuki Kaneko, Kazuhiro Kikuchi
We evaluated the effects of polyethylene glycol (PEG) and Supercool X-1000 (SC) as supplements during the vitrification of immature cumulus-enclosed porcine oocytes in a solution based on 17.5% ethylene glycol + 17.5% propylene glycol. After warming, the oocytes were subjected to in vitro maturation, fertilization and embryo culture. In Experiment 1, equilibration and vitrification solutions were supplemented with or without 2% (w/v) PEG (PEG+ and PEG-, respectively). The survival rate, cleavage and blastocyst development were similar between PEG+ and PEG- groups; however, all values were lower than those in the non-vitrified control...
November 24, 2016: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/27879344/failure-to-launch-aberrant-cumulus-gene-expression-during-oocyte-in-vitro-maturation
#11
Hannah Mary Brown, Kylie Dunning, Melanie Sutton-McDowall, Rob B Gilchrist, Jeremy G Thompson, Darryl L Russell
In vitro maturation (IVM) offers significant benefits for human infertility treatment and animal breeding, but this potential is yet to be fully realised due to reduced oocyte developmental competence in comparison with in vivo matured oocytes. Cumulus cells occupy an essential position in determining oocyte developmental competence. Here we have examined the areas of deficient gene expression, as determined within microarrays primarily from cumulus cells of mouse COCs, but also other species, between in vivo matured and in vitro matured oocytes...
November 22, 2016: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/27876896/the-reproductive-toxicity-of-cdse-zns-quantum-dots-on-the-in-vivo-ovarian-function-and-in-vitro-fertilization
#12
Gaixia Xu, Guimiao Lin, Suxia Lin, Na Wu, Yueyue Deng, Gang Feng, Qiang Chen, Junle Qu, Danni Chen, Siping Chen, Hanben Niu, Shujiang Mei, Ken-Tye Yong, Xiaomei Wang
Despite the usefulness of quantum dots (QDs) in biomedicine and optoelectronics, their toxicity risks remain a major obstacle for clinical usages. Hence, we studied the reproductive toxicity of CdSe/ZnS QDs on two aspects, (i) in vivo ovarian functions and (ii) in vitro fertilization process. The body weight, estrous cycles, biodistribution of QDs, and oocyte maturation are evaluated on female mice treated with QDs. The mRNA level of the follicle-stimulating hormone receptor (FSHr) and luteinizing hormone receptor (LHr) in ovaries are assayed...
November 23, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27876080/effect-of-testosterone-on-the-connexin37-of-sexual-mature-mouse-cumulus-oocyte-complex
#13
Yangyang Zhang, Yang Xu, Yanrong Kuai, Sheng Wang, Qing Xue, Jing Shang
BACKGROUND: Recent researches demonstrate that pre-treatment with androgen could increase retrieved oocytes number and clinical pregnancy rate in poor ovarian response (POR) patients. In view of gap junction intercellular communication (GJIC) is important for follicular growth, and androgen plays an important role in improving prognosis of POR patients, we speculate that androgen can increase the expression of connexin in follicle cells, and improve ovarian microenvironment, thus can promote ovarian response...
November 23, 2016: Journal of Ovarian Research
https://www.readbyqxmd.com/read/27867783/convective-and-large-scale-mass-flux-profiles-over-tropical-oceans-determined-from-synergistic-analysis-of-a-suite-of-satellite-observations
#14
Hirohiko Masunaga, Zhengzhao Johnny Luo
A new, satellite-based methodology is developed to evaluate convective mass flux and large-scale total mass flux. To derive the convective mass flux, candidate profiles of in-cloud vertical velocity are first constructed with a simple plume model under the constraint of ambient sounding and then narrowed down to the solution that matches satellite-derived cloud top buoyancy. Meanwhile, the large-scale total mass flux is provided separately from satellite soundings by a method developed previously. All satellite snapshots are sorted into a composite time series that delineates the evolution of a vigorous and organized convective system...
July 16, 2016: Journal of Geophysical Research. Atmospheres: JGR
https://www.readbyqxmd.com/read/27866059/glucocorticoid-metabolism-in-equine-follicles-and-oocytes
#15
D Scarlet, N Ille, R Ertl, B G Alves, G D A Gastal, S O Paiva, M O Gastal, E L Gastal, C Aurich
The objective of this study was to determine whether (1) systemic and intrafollicular cortisol concentrations in horses are directly related and (2) supraphysiological levels of glucocorticoids affect in vitro maturation (IVM) rates of oocytes. Specifically, we studied the (1) changes in the intrafollicular cortisol and progesterone in context with granulosa cell gene expression during maturation of equine follicles (from 5-9 mm, 10-14 mm, 15-19 mm, 20-24 mm, and ≥25 mm in diameter) and (2) effects of cortisol supplementation on IVM rates and gene expression of equine cumulus-oocyte complexes (COCs)...
October 29, 2016: Domestic Animal Endocrinology
https://www.readbyqxmd.com/read/27865449/characterizing-nuclear-and-mitochondrial-dna-in-spent-embryo%C3%A2-culture-media-genetic-contamination-identified
#16
Elizabeth R Hammond, Brent C McGillivray, Sophie M Wicker, John C Peek, Andrew N Shelling, Peter Stone, Larry W Chamley, Lynsey M Cree
OBJECTIVE: To characterize nuclear and mitochondrial DNA (mtDNA) in spent culture media from normally developing blastocysts to determine whether it could be used for noninvasive genetic assessment. DESIGN: Prospective embryo cohort study. SETTING: Academic center and private in vitro fertilization (IVF) clinic. PATIENT(S): Seventy patients undergoing intracytoplasmic sperm injection (ICSI) and 227 blastocysts. INTERVENTION(S): Culture media assessment, artificial blastocoele fluid collapse and DNA analysis using digital polymerase chain reaction (dPCR), long-range PCR, quantitative PCR (qPCR), and DNA fingerprinting...
November 16, 2016: Fertility and Sterility
https://www.readbyqxmd.com/read/27862569/fibroblast-growth-factor-10-markedly-improves-in-vitro-maturation-of-porcine-cumulus-oocyte-complexes
#17
Yeo-Jin Son, Seung-Eun Lee, Hyuk Hyun, Min-Young Shin, Yun-Gwi Park, Sang-Gi Jeong, Eun-Young Kim, Se-Pill Park
Growth factors synthesized by ovarian somatic cells affect cumulus cell expansion and oocyte maturation in vitro. Fibroblast growth factor 10 (FGF10), for example, is a known regulator of mammalian cumulus-oocyte complex maturation. In this study, we investigated the effects of 0, 5, 10, 50, and 100 ng/mL FGF10 (5F, 10F, 50F, and 100F, respectively) on in vitro cumulus cell expansion, oocyte maturation, and embryo development. The percentage of fully expanded cumulus cells at the oocyte's metaphase-II (MII) stage was significantly higher in the 10F-treated group than in the control...
November 11, 2016: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/27862395/the-nuclear-and-developmental-competence-of-cumulus-oocyte-complexes-is-enhanced-by-three-dimensional-coculture-with-conspecific-denuded-oocytes-during-in-vitro-maturation-in-the-domestic-cat-model
#18
M G Morselli, G C Luvoni, P Comizzoli
The objective of the study was to assess the efficacy of coculture with conspecific cumulus-denuded oocytes (CDOs) during in vitro maturation in a three-dimensional system of barium alginate microcapsules on the in vitro embryo development of domestic cat cumulus-oocyte complexes (COCs). In Experiment I, COCs were cocultured with conspecific CDOs or cultured separately in a 3D system for 24 hr of in vitro maturation, before assessing the meiotic progression. In Experiment II, the in vitro fertilization of COCs and CDOs was carried out with chilled epididymal spermatozoa and the presumptive zygotes were cultured in vitro separately for 7 days in 3D microcapsules before assesment of embryonic development...
November 15, 2016: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/27859704/age-and-anti-m%C3%A3-llerian-hormone-levels-predict-the-success-of-in-vitro-maturation-of-cat-oocytes
#19
F Snoeck, S Sarrazin, E Wydooghe, A Van Soom
Up to date, in vitro maturation (IVM) rates of oocytes are highly variable between individual cats. This study was carried out to investigate the predictive value of age and anti-Müllerian hormone (AMH) concentration in relation to capacity for IVM of cat oocytes. Ovaries were collected from 33 cats, which were divided into three age groups: (i) 0-3 months (pre-pubertal); (ii) 3-12 months (peripubertal); and (iii) older than 12 months (pubertal). The cumulus-oocyte complexes (COCs) were matured and subsequently stained to check nuclear maturation status, and blood was taken for AMH analysis...
November 15, 2016: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/27855185/aberrant-expression-of-timp-2-and-pbef-genes-in-the-placentae-of-cloned-mice-due-to-epigenetic-reprogramming-error
#20
Hong Rye Kim, Jae Eun Lee, Reza Kheirkhahi Oqani, So Yeon Kim, Teruhiko Wakayama, Chong Li, Su Jin Sa, Je Seok Woo, Dong Il Jin
Cloned mice derived from somatic or ES cells show placental overgrowth (placentomegaly) at term. We had previously analyzed cloned and normal mouse placentae by using two-dimensional gel electrophoresis and mass spectrometry to identify differential protein expression patterns. Cloned placentae showed upregulation of tissue inhibitor of metalloproteinase-2 (TIMP-2), which is involved in extracellular matrix degradation and tissue remodeling, and downregulation of pre-B cell colony enhancing factor 1 (PBEF), which inhibits apoptosis and induces spontaneous labor...
2016: PloS One
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