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https://www.readbyqxmd.com/read/28915981/transcutaneous-electrical-acupoint-stimulation-improves-the-outcomes-of-in-vitro-fertilization-a-prospective-randomized-and-controlled-study
#1
Fan Qu, Fang-Fang Wang, Yan Wu, Jue Zhou, Nicola Robinson, Paul J Hardiman, Jie-Xue Pan, Yi-Jing He, Yu-Hang Zhu, Han-Zhi Wang, Xiao-Qun Ye, Ke-Lin He, Long Cui, Hong-Li Zhao, Ying-Hui Ye
OBJECTIVES: To explore whether transcutaneous electrical acupoint stimulation (TEAS) can improve the outcomes of in vitro fertilization (IVF). DESIGN: A prospective, randomized, and controlled study. SETTING: IVF center in a university hospital. PARTICIPANTS: Four hundred and eighty-one infertile patients with bilateral tubal blockage who were referred for IVF. Patients were randomized into four groups. INTERVENTION: TEAS was administered for 30min, respectively, at 24h before TVOR and two hours before ET...
September 2017: Explore: the Journal of Science and Healing
https://www.readbyqxmd.com/read/28912491/meiotic-arrest-with-roscovitine-and-follicular-fluid-improves-cytoplasmic-maturation-of-porcine-oocytes-by-promoting-chromatin-de-condensation-and-gene-transcription
#2
Min Zhang, Chuan-Xin Zhang, Liu-Zhu Pan, Shuai Gong, Wei Cui, Hong-Jie Yuan, Wei-Ling Zhang, Jing-He Tan
The developmental capacity of in vitro matured oocytes is inferior to that of the in vivo matured ones due to insufficient cytoplasmic maturation. Although great efforts were made to accomplish better cytoplasmic maturation by meiotic arrest maintenance (MAM) before in vitro maturation (IVM), limited progress has been achieved in various species. This study showed that MAM of porcine oocytes was better achieved with roscovitine than with dibutyryl cyclic adenosine monophosphate (db-cAMP) or 3-isobutyl-1-methylxanthine...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28911209/intracellular-activation-of-ovastacin-mediates-pre-fertilization-hardening-of-the-zona-pellucida
#3
Hagen Körschgen, Michael Kuske, Konstantin Karmilin, Irene Yiallouros, Melanie Balbach, Julia Floehr, Dagmar Wachten, Willi Jahnen-Dechent, Walter Stöcker
STUDY QUESTION: How and where is pro-ovastacin activated and how does active ovastacin regulate zona pellucida hardening (ZPH) and successful fertilization? STUDY FINDING: Ovastacin is partially active before exocytosis and pre-hardens the zona pellucida (ZP) before fertilization. WHAT IS KNOWN ALREADY: The metalloproteinase ovastacin is stored in cortical granules, it cleaves zona pellucida protein 2 (ZP2) upon fertilization and thereby destroys the ZP sperm ligand and triggers ZPH...
September 1, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/28892263/regulation-of-germ-cell-development-by-intercellular-signaling-in-the-mammalian-ovarian-follicle
#4
REVIEW
Hugh J Clarke
Prior to ovulation, the mammalian oocyte undergoes a process of differentiation within the ovarian follicle that confers on it the ability to give rise to an embryo. Differentiation comprises two phases-growth, during which the oocyte increases more than 100-fold in volume as it accumulates macromolecules and organelles that will sustain early embryogenesis; and meiotic maturation, during which the oocyte executes the first meiotic division and prepares for the second division. Entry of an oocyte into the growth phase appears to be triggered when the adjacent granulosa cells produce specific growth factors...
September 11, 2017: Wiley Interdisciplinary Reviews. Developmental Biology
https://www.readbyqxmd.com/read/28888606/preovulatory-follicle-characteristics-and-oocyte-competence-in-repeat-breeder-dairy-cows
#5
P Sood, M Zachut, I Dekel, H Dube, S Jacoby, U Moallem
The varied and elusive etiology of repeat breeding (RB) in dairy cows necessitates evaluation of oocytes and follicles, which have not previously been assessed together. Accordingly, we evaluated characteristics of preovulatory follicles and the competence of oocytes in control (CTL) and RB cows. The estrous cycles of 35 cows (18 CTL and 17 RB) were synchronized using PGF2α and estrus detection. Cows with a corpus luteum were treated with PGF2α and, 14 to 15 d after a visible behavioral estrus, they were administered a second PGF2α, followed 48 h later by follicular fluid (FF) aspiration of the preovulatory follicles...
September 6, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28870888/cell-secreted-vesicles-containing-micrornas-as-regulators-of-gamete-maturation
#6
Juliano C da Silveira, Ana Clara F C M de Avila, Hannah L Garrett, Jason Bruemmer, Quinton Winger, Gerrit Bouma
Mammalian gamete maturation requires extensive signaling between germ cells and their surrounding somatic cells. In the ovary, theca cells, mural granulosa cells, cumulus cells and the oocyte all secrete factors throughout follicle growth and maturation that are critical for ovulation of a high quality oocyte with the competence to develop into an embryo. Similarly, maturation of sperm occurs as it transits the epididymis during which epididymal epithelium and sperm exchange secretory factors that are required for sperm to gain motility and fertility...
September 4, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28868943/evaluation-of-pro-oxidant-antioxidant-balance-pab-and-its-association-with-inflammatory-cytokines-in-polycystic-ovary-syndrome-pcos
#7
T Artimani, J Karimi, M Mehdizadeh, M Yavangi, E Khanlarzadeh, M Ghorbani, S Asadi, N Kheiripour
Chronic low-grade inflammation has been suggested as a key contributor of the pathogenesis and development of polycystic ovary syndrome (PCOS). To investigate the association between oxidative stress status and inflammatory cytokines in follicular fluid of 21 PCOS women compared to 21 women with normal ovarian function who underwent intra-cytoplasmic sperm injection. Concentration of IL-6, IL-8, IL-10, and TNF-α was measured using sandwich ELISA. Oxidative stress was examined by measuring total oxidant status (TOS), malondialdehyde (MDA), total antioxidant capacity (TAC), and thiol groups...
September 4, 2017: Gynecological Endocrinology
https://www.readbyqxmd.com/read/28863349/effect-of-bovine-somatotropin-injection-in-late-pregnant-holstein-heifers-on-metabolic-parameters-and-steroidogenic-potential-of-the-first-postpartum-dominant-follicle
#8
Diego Andres Velasco Acosta, Augusto Schneider, Carolina Bespalhok Jacometo, Joao Alvarado Rincon, Felipe Cardoso, Marcio Nunes Corrêa
The aim of this study was to determine the effect of pre-partum injections of bovine somatotropin (bST) in dairy heifers on metabolic markers and the steroidogenic potential of the first postpartum dominant follicle. Heifers were assigned to two groups: bST (ST; n = 29), that received two doses of bST (500 mg/dose) at -28 and -14 days relative to calving; and control (CTL; n = 30), that did not received bST. Follicular development was monitored via ultrasound every 3 days starting at 8 days in milk (DIM) in a subset of 20 heifers until the day the first large follicle reached a diameter of 16 mm...
August 26, 2017: Theriogenology
https://www.readbyqxmd.com/read/28845753/follistatin-rescues-blastocyst-development-of-poor-quality-porcine-cumulus-oocyte-complexes-by-delaying-meiotic-resumption-with-decreased-cgmp
#9
Bo Myeong Lee, Ju Lan Chun, Ji Hye Lee, Eun Young Kim, Kang-Sun Park, Jin-Hee Lee, Bradford W Daigneault, George W Smith, Keun Jung Kim, Kyu-Tae Chang, Sang-Rae Lee, Sun-Uk Kim, Seon-A Choi, Kyung-Bon Lee, Min Kyu Kim
Mammalian oocytes resume maturation when removed from follicles and cultured in vitro. During folliculogenesis, oocytes are bathed in follicular fluid (FF), which provides an important and specialized microenvironment for oocyte competence. Follistatin (FST) is one component of FF that may play a role in oocyte maturation and embryo development. This study was conducted to examine possible effects of FST on porcine oocyte competence and embryo development. Exogenous FST in oocyte maturation medium for 22 or 44 hours did not improve nuclear maturation and had no effect on good quality cumulus-oocyte complexes (COCs)...
January 1, 2017: Reproductive Sciences
https://www.readbyqxmd.com/read/28828668/protocol-for-exosome-isolation-from-small-volume-of-ovarian-follicular-fluid-evaluation-of-ultracentrifugation-and-commercial-kits
#10
Shlomit Kenigsberg, Brandon A Wyse, Clifford L Librach, Juliano C da Silveira
The ovarian follicular fluid (FF) is a complex fluid that constitutes the microenvironment of developing follicles and contains factors secreted by the surrounding cells and blood plasma compounds that cross the "blood-follicle barrier." Upon oocyte retrieval (in human, bovine, and equine) the follicular fluid is normally discarded and represents a repertoire of cellular messages exchanged during follicle development, thus providing a suitable sample for performing oocyte quality diagnostics. Several studies report on the presence of extracellular vesicles (EVs) in FF from human, bovine and equine...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28822903/uterine-clinical-findings-fertility-rate-leucocyte-migration-and-cox-2-protein-levels-in-the-endometrial-tissue-of-susceptible-mares-treated-with-platelet-rich-plasma-before-and-after-ai
#11
Lorenzo G Segabinazzi, Aime M Friso, Sebastian B Correal, André M Crespilho, José Antonio Dell'Aqua, Jordi Miró, Frederico O Papa, Marco Antonio Alvarenga
Persistent mating-induced endometritis (PMIE) results in decreased fertility in horses, thereby causing a significant impact in the horse market. Platelet-rich plasma (PRP), a modulator of the inflammatory response, has been largely used in veterinary medicine. Here, we investigated the effects of PRP on uterine inflammation, conception rate, endometrial polymorphonuclear neutrophil (PMN) migration, and COX-2 protein levels in the endometrial tissue. Thirteen PMIE-susceptible mares were used for artificial insemination (AI)...
August 12, 2017: Theriogenology
https://www.readbyqxmd.com/read/28822459/oral-propylene-glycol-modifies-follicular-fluid-and-gene-expression-profiles-in-cumulus-oocyte-complexes-and-embryos-in-feed-restricted-heifers
#12
G Gamarra, C Ponsart, S Lacaze, F Nuttinck, A Cordova, P Mermillod, B Marquant-Le Guienne, D Monniaux, P Humblot, A A Ponter
Dietary supplementation with propylene glycol (PG) increases in vitro production of high-quality embryos in feed-restricted heifers. The aim of the present study was to evaluate the effects of PG in feed-restricted heifers on follicular fluid insulin and insulin-like growth factor (IGF) 1 concentrations, expression of IGF system genes in oocytes and cumulus cells and the expression of selected genes in blastocysts. Feed-restricted (R) heifers were drenched with water or PG during induced oestrous cycles (400mL of PG or water/drench, daily drenching at 1600 hours for the first 9 days of the oestrous cycle)...
August 21, 2017: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/28821386/serum-and-follicular-fluid-testosterone-concentrations-do-not-correlate-questioning-the-impact-of-androgen-supplementation-on-the-follicular-endocrine-milieu
#13
Michael von Wolff, Petra Stute, Markus Eisenhut, Ulrich Marti, Norman Bitterlich, Nick A Bersinger
Basic research into a possible link between serum and follicular fluid androgen concentrations to detemine whether androgen supplementation in low responders affects follicular endocrine milieu is still lacking. Ninety-seven women (aged 28-43 years) undergoing one natural IVF cycle without any hormone stimulation were analysed. Serum and follicular fluid were collected at the time of follicle aspiration, and the concentrations of LH, total testosterone, oestradiol, dehydroepiandrosterone and anti-Mullerian hormone (AMH) were determined...
August 2, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/28820403/high-levels-of-soluble-vascular-endothelial-growth-factor-receptor-1-sflt1-and-low-levels-of-vascular-endothelial-growth-factor-in-follicular-fluid-on-the-day-of-oocyte-retrieval-correlate-with-ovarian-hyperstimulation-syndrom-regardless-of-the-stimulation
#14
A J Jakimiuk, M A Nowicka, M Zagozda, K Koziol, P Lewandowski, T Issat
The aim of the study was to assess the predictive value of vascular endothelial growth factor (VEGF), its soluble receptor - sVEGF-R1/sFlt1 and endocrine gland-derived vascular endothelial growth factor (EG-VEGF) concentrations in serum and follicular fluid (FF) for ovarian hyperstimulation syndrome (OHSS) in women undergoing controlled ovarian hyperstimulation (COH) protocols. Patients have been divided into 3 groups: control group on natural cycle, patients stimulated with GnRH agonist and patients stimulated with GnRH antagonist...
June 2017: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/28810575/increased-bone-morphogenetic-protein-6-in-follicular-fluid-and-granulosa-cells-may-correlate-with-fertilization-and-embryo-quality-in-humans
#15
Ying Liang, Qinying Cao, Xing Gao, Huilan Du
Bone morphogenetic protein-6 (BMP-6), which is a member of the transforming growth factor-β superfamily, is associated with the regulation of bone development and various physiological processes. In the present study, the expression of BMP-6 in follicular fluid and granulosa cells (GCs) from pregnant and non-pregnant patients was explored. A total of 44 pregnant patients (pregnant group) and 36 non-pregnant patients (non-pregnant group) were recruited for the present study. The expression of BMP-6 was detected using western blotting and reverse transcription-quantitative polymerase chain reaction...
August 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28795044/n-glycoproteomic-analysis-of-human-follicular-fluid-during-natural-and-stimulated-cycles-in-patients-undergoing-in-vitro-fertilization
#16
Hee-Joung Lim, Ae Eun Seok, Jiyou Han, Jiyeong Lee, Sungeun Lee, Hee-Gyoo Kang, Byung Heun Cha, Yunseok Yang
OBJECTIVE: Hyperstimulation methods are broadly used for in vitro fertilization (IVF) in patients with infertility; however, the side effects associated with these therapies, such as ovarian hyperstimulation syndrome (OHSS), have not been well studied. N-glycoproteomes are subproteomes used for the remote sensing of ovarian stimulation in follicular growth. Glycoproteomic variation in human follicular fluid (hFF) has not been evaluated. In this study, we aimed to identify and quantify the glycoproteomes and N-glycoproteins (N-GPs) in natural and stimulated hFF using label-free nano-liquid chromatography/electrospray ionization-quad time-of-flight mass spectrometry...
June 2017: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/28752970/-trans-differentiation-of-human-amniotic-epithelial-cells-into-follicle-like-structure
#17
Hui Wang, Fei Wang, Li-Ping Bai, Xiao-Yu Mo, Hui-Yun Tang, Ai Zheng
OBJECTIVE: To determine whether hAECs can differentiate into follicle-like structure. METHODS: hAECs were isolated from human term placenta and cultured sequentially in medium supplemented with 5% human follicular fluid. The morphology of the cells was examined by inverted microscope. Changes of estradiol levels and expressions of germ cell specific gene in the cultured medium were detected by chemiluminescence immunoassay and Real time-Polymerase Chain Reaction (RT-PCR), respectively...
July 2017: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
https://www.readbyqxmd.com/read/28750635/proteomic-analysis-of-human-follicular-fluid-associated-with-successful-in-vitro-fertilization
#18
Xiaofang Shen, Xin Liu, Peng Zhu, Yuhua Zhang, Jiahui Wang, Yanwei Wang, Wenting Wang, Juan Liu, Ning Li, Fujun Liu
BACKGROUND: Human follicular fluid (HFF) provides a key environment for follicle development and oocyte maturation, and contributes to oocyte quality and in vitro fertilization (IVF) outcome. METHODS: To better understand folliculogenesis in the ovary, a proteomic strategy based on dual reverse phase high performance liquid chromatography (RP-HPLC) coupled to matrix-assisted laser desorption/ionization time-of-flight tandem mass spectrometry (LC-MALDI TOF/TOF MS) was used to investigate the protein profile of HFF from women undergoing successful IVF...
July 27, 2017: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/28747195/oleic-acid-induces-down-regulation-of-the-granulosa-cell-identity-marker-foxl2-and-up-regulation-of-the-sertoli-cell-marker-sox9-in-bovine-granulosa-cells
#19
Vengala Rao Yenuganti, Jens Vanselow
During negative energy balance, the concentration of different fatty acids, especially of oleic acid (OA) increases in the follicular fluid of cattle. Previously, we showed that OA induced morphological, physiological and molecular changes in cultured bovine granulosa cells. In our present study we analyzed effects of OA on the expression of markers for granulosa and Sertoli cell identity, FOXL2 and SOX9, respectively, in addition to effects on the FOXL2 regulated genes ESR2, FST, PTGS2 and PPARG. The results showed that OA down-regulated FOXL2, ESR2, FST and PPARG but up-regulated PTGS2 and SOX9...
July 26, 2017: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/28738699/caspase-3-gene-expression-in-human-luteinized-granulosa-cells-is-inversely-correlated-with-the-number-of-oocytes-retrieved-after-controlled-ovarian-stimulation
#20
Verônica N Lobach, Maíra Casalechi, Cynthia Dela Cruz, Maria T Pereira, Helen L Del Puerto, Fernando M Reis
Granulosa cells control oocyte maturation through paracrine signalling and changes to the microenvironment around the oocyte. Apoptosis occurs as a physiological mechanism of granulosa cell renewal, but how it relates with the ovarian response to induced ovulation is still unclear. Therefore, this study evaluated apoptosis-related gene expression levels in granulosa cells of patients undergoing controlled ovarian stimulation. We enrolled prospectively 59 consecutive IVF patients referred to a tertiary academic hospital for couple infertility treatment...
July 25, 2017: Human Fertility: Journal of the British Fertility Society
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