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https://www.readbyqxmd.com/read/28333263/loss-of-luteotropic-prostaglandin-e-plays-an-important-role-in-the-regulation-of-luteolysis-in-women
#1
Junko Nio-Kobayashi, Masataka Kudo, Noriaki Sakuragi, Toshihiko Iwanaga, W Colin Duncan
STUDY QUESTION: Do intraluteal prostaglandins (PG) contribute to luteal regulation in women? SUMMARY ANSWER: Prostaglandin E (PGE), which is produced in human granulosa-lutein cells stimulated with luteotropic hCG, exerts similar luteotropic effects to hCG, and the expression of PG synthetic and metabolic enzymes in the human CL is driven toward less PGE but more prostaglandin F (PGF) during luteolysis. WHAT IS KNOWN ALREADY: Uterine PGF is a major luteolysin in many non-primate species but not in women...
March 17, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/28324271/anti-mullerian-hormone-concentrations-in-individual-follicular-fluids-within-one-stimulated-ivf-cycle-resemble-blood-serum-values
#2
Michael Schenk, Julia Maria Kröpfl, Barbara Obermayer-Pietsch, Elisabeth Feldmeier, Gregor Weiss
PURPOSE: Anti-Mullerian hormone (AMH) is commonly known as the most potent marker for ovarian reserve due to its decline as female age increases. While serum AMH (sAMH) levels have been intensively investigated, there is less data regarding AMH concentrations in follicular fluid (FF), since FF has usually been designated as waste product during oocyte collection in assisted reproductive technologies. This pilot study investigated follicle AMH concentrations (fAMH) of several follicles per ovary, individually collected with the Steiner-Tan needle, and compared them to sAMH concentrations in women undergoing IVF treatment...
March 21, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28323970/obesity-modulates-inflammation-and-lipid-metabolism-oocyte-gene-expression-a-single-cell-transcriptome-perspective
#3
Meghan L Ruebel, Matthew Cotter, Clark R Sims, Dean M Moutos, Thomas M Badger, Mario A Cleves, Kartik Shankar, Aline Andres
Context: It is hypothesized that obesity adversely affects the ovarian environment which can disrupt oocyte maturation and may further impact embryonic development. Objective: This study aimed to compare oocyte gene expression profiles and follicular fluid (FF) content from overweight/obese (OW) women and normal weight (NW) women who were undergoing fertility treatments. Design: Using single cell transcriptomic analyses, we investigated oocyte gene expression using RNA-seq...
March 15, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28297660/progesterone-prevents-high-grade-serous-ovarian-cancer-by-inducing-necroptosis-of-p53-defective-fallopian-tube-epithelial-cells
#4
Na-Yiyuan Wu, Hsuan-Shun Huang, Tung Hui Chao, Hsien Ming Chou, Chao Fang, Chong-Zhen Qin, Chueh-Yu Lin, Tang-Yuan Chu, Hong Hao Zhou
High-grade serous ovarian carcinoma (HGSOC) originates mainly from the fallopian tube (FT) epithelium and always carries early TP53 mutations. We previously reported that tumors initiate in the FT fimbria epithelium because of apoptotic failure and the expansion of cells with DNA double-strand breaks (DSB) caused by bathing of the FT epithelial cells in reactive oxygen species (ROSs) and hemoglobin-rich follicular fluid (FF) after ovulation. Because ovulation is frequent and HGSOC is rare, we hypothesized that luteal-phase progesterone (P4) could eliminate p53-defective FT cells...
March 14, 2017: Cell Reports
https://www.readbyqxmd.com/read/28285567/increased-scf-in-follicular-fluid-and-granulosa-cells-positively-correlates-with-oocyte-maturation-fertilization-and-embryo-quality-in-humans
#5
Jun Tan, Yang Zou, Xing-Wu Wu, Li-Feng Tian, Qiong Su, Jin-Xia He, Zhi-Hui Huang, Yan Zhao, Li-Ping Wu, Qiong-Fang Wu
Stem cell factor (SCF), which is derived from granulosa cells (GCs), plays a key role in the process of follicular development and oocyte maturation. The present study aimed to explore whether the levels of SCF in follicular fluid (FF) and GCs can be used as a potential marker for predicting oocyte developmental potential. Follicular fluid and GC samples from 150 female patients undergoing intracytoplasmic sperm injection were collected in this study. The SCF concentrations in FFs and SCF messenger RNA (mRNA) in GCs were evaluated by using enzyme-linked immunosorbent assay and real-time polymerase chain reaction, respectively...
January 1, 2017: Reproductive Sciences
https://www.readbyqxmd.com/read/28277116/regulation-of-endometrial-cell-proliferation-by-estrogen-induced-bdnf-signaling-pathway
#6
Fangzheng Dong, Qiyao Zhang, Wei Kong, Jun Chen, Junlan Ma, Li Wang, Yanian Wang, Yan Liu, Yan Li, Ji Wen
Brain-derived neurotrophic factor (BDNF) is a member of the neurotrophin growth factors family. Recent studies indicated that the level of BDNF in follicular fluid is a marker for oocyte quality and infertility. Here, we intend to further investigate the function of BDNF and its signaling pathway in the regulation of endometrial cells proliferation. We found that BDNF is a critical growth factor in endometrial cells. Activation of signal transducer and activator of transcription 3 signaling pathway is required for BNDF-regulated endometrial cell proliferation...
March 2, 2017: Gynecological Endocrinology
https://www.readbyqxmd.com/read/28277109/thyroid-peroxidase-identified-in-human-granulosa-cells-another-piece-to-the-thyroid-ovary-puzzle
#7
Patrizia Monteleone, Pinuccia Faviana, Paolo Giovanni Artini
Thyroid hormones seemingly influence the maturation of the human oocyte. Thyroid hormone receptors have been isolated in granulosa mural and cumulus cells and the mature oocyte of the human ovarian follicle. Thyroid hormones are present in follicular fluid in concentrations similar to those in serum. Most importantly, enzymes involved in the chain that regulate the generation of thyroid hormones have been found in granulosa cells. For the first time, we have isolated thyroid peroxidase by immunocytochemistry in the granulosa cumulus cells of the human ovarian follicle, thereby supporting the hypothesis that the human ovarian follicle may be an independent thyroid-hormone producing unit...
March 5, 2017: Gynecological Endocrinology
https://www.readbyqxmd.com/read/28271235/expression-of-akt1-along-with-akt2-in-granulosa-lutein-cells-of-hyperandrogenic-pcos-patients
#8
Saeid Nekoonam, Mohammad Naji, Maryam Shabani Nashtaei, Keywan Mortezaee, Morteza Koruji, Leili Safdarian, Fardin Amidi
PURPOSE: AKTs have a pivotal role in the granulosa-lutein cell (GC) proliferation and folliculogenesis, and there is a reciprocal feedback between AKT with androgen. Therefore, we aimed to evaluate the role of AKTs in GCs of hyperandrogenic (+HA) PCOS cases. METHOD: There were three groups: control, +HA PCOS and -HA (non-hyperandrogenic) PCOS. All groups were subjected to GnRH antagonist protocol for stimulation of ovulation. Follicular fluid was aspirated from large follicles, and GCs were isolated using cell strainer method...
April 2017: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/28260700/proteome-profiling-of-bovine-follicular-fluid-specific-proteins-and-their-effect-on-in-vitro-embryo-development
#9
Saranya Satitmanwiwat, Chinarat Changsangfah, Tassanee Faisaikarm, Kornkanok Promthep, Sujira Thammawung, Kulnasan Saikhun, Kampon Kaeoket
The objective of this study was to determine the effect of bovine follicular fluid proteins (bFF) and their differently charged groups as maturation media supplements for in vitro embryo development. bFF was obtained by aspiration from large healthy follicles (4-10 mm in diameter) and was precipitated by 30-50% (NH4)2SO4. The precipitated protein was fractionated into basic and acidic fractions by ion-exchanger columns. In experiment 1, the oocytes were matured in TCM-199 with 1) FBS+hormones (control) and 2) 10% bFF...
March 3, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28257866/expression-of-the-vascular-endothelial-growth-factor-system-vegf-in-the-porcine-oviduct-during-the-estrous-cycle
#10
O López Albors, F Olsson, A B Llinares, H Gutiérrez, R Latorre, E Candanosa, A Guillén-Martínez, M J Izquierdo-Rico
The expression and localization of VEGFA and its main receptors Flt-1 and KDR is characterized in the oviduct throughout the porcine estrous cycle. Oviducts were sampled from sows at early follicular, late follicular, early luteal and late luteal stages of the estrous cycle and a segment from the mid portion of the ampulla and isthmus studied by real time RT-PCR and quantitative immunohistochemistry. The expression of the three components of the VEGF system was continuous, although differences were observed depending on the oviduct portion, the stage of the estrous cycle and the histological layer...
April 15, 2017: Theriogenology
https://www.readbyqxmd.com/read/28244827/deriving-cells-expressing-markers-of-female-germ-cells-from-premature-ovarian-failure-patient-specific-induced-pluripotent-stem-cells
#11
Yanfei Wen, Wen He, Manbo Jiang, Minhui Zeng, Liuhong Cai
AIM: We proposed a two-step protocol for deriving cells expressing markers of female germ cells (FGCs) from premature ovarian failure patient-specific induced pluripotent stem cells (POF-iPSCs). MATERIAL & METHODS: We cultured POF-iPSCs in suspension and pretreated them with TGFβ-1 (1 ng/ml) for 2 days and continued with both TGFβ-1 and BMP4 (50 ng/ml) for 5 more days. Then changed to media containing retinoic acid (1 μM) and 5% follicular fluid for another 7 days...
March 2017: Regenerative Medicine
https://www.readbyqxmd.com/read/28238531/fibroblast-growth-factor-2-fgf2-and-vascular-endothelial-growth-factor-a-vegfa-synergistically-promote-steroidogenesis-and-survival-of-cultured-buffalo-granulosa-cells
#12
S R Mishra, Jaya Bharati, G Rajesh, V S Chauhan, G Taru Sharma, S Bag, V P Maurya, G Singh, M Sarkar
The present study investigated the combined effect of fibroblast growth factor 2 (FGF2) and vascular endothelial growth factor A (VEGF-A) on estradiol (E2) secretion and relative abundance of mRNA for aromatase enzyme (CYP19A1), proliferating cell nuclear antigen (PCNA) and BCL-2 associated X protein (BAX) in cultured buffalo granulosa cells (GCs). Follicles were isolated and classified into four groups based on size and E2 concentration in follicular fluid (FF): Small, 4-6mm diameter, E2<0.5ng/ml; Medium, 7-9mm, E2=0...
April 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28237329/incubation-of-boar-spermatozoa-in-viscous-media-by-addition-of-methylcellulose-improves-sperm-quality-and-penetration-rates-during-in%C3%A2-vitro-fertilization
#13
David González-Abreu, Soledad García-Martínez, Vanesa Fernández-Espín, Raquel Romar, Joaquín Gadea
This work was designed to study whether viscous media can improve the in vitro sperm functionality in pigs by using methylcellulose as a thickener. Viscosity of porcine oviductal fluid (POF) was compared with culture medium (Tyrode's) supplemented with methylcellulose (MET 0, 0.5 and 1% w/v). Spermatozoa were incubated in the different media (0, 1 and 2 h) and sperm motion parameters, lipid membrane disorder, plasma membrane integrity and reactive oxygen species (ROS) formation were assessed. Fertilization results were assessed i) preincubating spermatozoa in the viscous media followed by gamete coculture in a non-viscous medium; and ii) gamete coculture in the viscous media...
April 1, 2017: Theriogenology
https://www.readbyqxmd.com/read/28231273/periovulatory-follicular-fluid-levels-of-estradiol-trigger-inflammatory-and-dna-damage-responses-in-oviduct-epithelial-cells
#14
Sergio E Palma-Vera, Jennifer Schoen, Shuai Chen
OBJECTIVE: Ovarian steroid hormones (mainly E2 and P4) regulate oviduct physiology. Serum-E2 acts on the oviduct epithelium from the basolateral cell compartment. Upon ovulation, the apical compartment of the oviduct epithelium is temporarily exposed to follicular fluid, which contains much higher levels of E2 than serum. The aim of this study was to evaluate the effects of human periovulatory follicular fluid levels of E2 on oviduct epithelial cells using two porcine in vitro models...
2017: PloS One
https://www.readbyqxmd.com/read/28215840/cytidine-deaminase-apobec3a-induction-in-fallopian-epithelium-after-exposure-to-follicular-fluid
#15
Pavla Brachova, Nehemiah S Alvarez, Bradley J Van Voorhis, Lane K Christenson
OBJECTIVE: Ovarian carcinomas that originate from fallopian epithelial cells are suggested to arise due to repeated exposure to ovulatory follicular fluid (FF). Mechanistic explanation(s) for how this occurs are unknown. Here, we sought to understand if FF exposure to fallopian epithelial cells could induce DNA damage and expression of a known family of DNA mutators, apolipoprotein B mRNA editing enzyme, catalytic polypeptide (APOBEC) cytidine deaminases. METHODS: Follicular fluid and matched patient plasma samples were obtained from donors...
February 16, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/28207940/structural-and-functional-changes-to-lymph-nodes-in-ageing-mice
#16
Vivian M Turner, Neil A Mabbott
Lymph nodes (LN) are secondary lymphoid organs spread throughout the lymphatic system. They function to filter pathogenic material from the lymphatic fluid to maintain the health of the organism. Subcapsular sinus macrophages (SCSM) are among the first-responders within the LN due to their strategic location within the subcapsular sinus region. These macrophages aid the delivery of immune complexes to B cells and follicular dendritic cells (FDC) within the LN. Here we show an increase in SCSM and other macrophage populations within aged LN...
February 16, 2017: Immunology
https://www.readbyqxmd.com/read/28201504/gonadotrophin-stimulation-in-ivf-alters-the-immune-cell-profile-in-follicular-fluid-and-the-cytokine-concentrations-in-follicular-fluid-and-serum
#17
Z Kollmann, S Schneider, M Fux, N A Bersinger, M von Wolff
No abstract text is available yet for this article.
February 15, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28197932/effect-of-gnrha-ovulation-trigger-dose-on-follicular-fluid-characteristics-and-granulosa-cell-gene-expression-profiles
#18
Thi Ngoc Lan Vuong, M T Ho, T Q Ha, M Brehm Jensen, C Yding Andersen, P Humaidan
PURPOSE: A recent dose-finding study showed no significant differences in number of mature oocytes, embryos and top-quality embryos when triptorelin doses of 0.2, 0.3 or 0.4 mg were used to trigger final oocyte maturation in oocyte donors co-treated with a gonadotropin-releasing hormone (GnRH) antagonist. This analysis investigated whether triptorelin dosing for triggering final oocyte maturation in oocyte donors induced differences in follicular fluid (FF) hormone levels and granulosa cell gene expression...
February 14, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28196109/associations-between-pon1-enzyme-activities-in-human-ovarian-follicular-fluid-and-serum-specimens
#19
Keewan Kim, Michael S Bloom, Victor Y Fujimoto, Richard W Browne
The importance of high-density lipoprotein (HDL) particle components to reproduction is increasingly recognized, including the constituent paraoxonase 1 (PON1). However, the reliability characteristics of PON1 enzymes in ovarian follicular fluid (FF) as biomarkers for clinical and epidemiologic studies have not been described. Therefore, we characterized PON1 enzymes in FF and serum and assessed the impact of the PON1 Q192R polymorphism on associations between enzyme activities in two compartments. We also evaluated associations between HDL particle size and enzyme activities...
2017: PloS One
https://www.readbyqxmd.com/read/28188594/extracellular-micrornas-in-follicular-fluid-and-their-potential-association-with-oocyte-fertilization-and-embryo-quality-an-exploratory-study
#20
Ronit Machtinger, Rodosthenis S Rodosthenous, Michal Adir, Abdallah Mansour, Catherine Racowsky, Andrea A Baccarelli, Russ Hauser
PURPOSE: The purpose of this study is to determine the profile of extracellular microRNAs (exmiRNAs) in follicular fluid (FF) and explore their association with fertilization potential and embryo quality. METHODS: We collected FF from single follicles containing mature oocytes from 40 women undergoing IVF and we screened for the expression of 754 exmiRNAs in FF using the TaqMan OpenArray® qPCR platform. To determine the association of exmiRNAs and IVF outcomes, we compared their expression levels in FF samples that differ by fertilization status (normally, abnormally, and failed to fertilize) and embryo quality (top vs...
February 10, 2017: Journal of Assisted Reproduction and Genetics
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