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Postovulatory follicle

Hannah Demond, Tom Trapphoff, Deborah Dankert, Martyna Heiligentag, Ruth Grümmer, Bernhard Horsthemke, Ursula Eichenlaub-Ritter
Delayed ovulation and delayed fertilization can lead to reduced developmental competence of the oocyte. In contrast to the consequences of postovulatory aging of the oocyte, hardly anything is known about the molecular processes occurring during oocyte maturation if ovulation is delayed (preovulatory aging). We investigated several aspects of oocyte maturation in two models of preovulatory aging: an in vitro follicle culture and an in vivo mouse model in which ovulation was postponed using the GnRH antagonist cetrorelix...
2016: PloS One
Julie Lamy, Philippe Liere, Antoine Pianos, Fanny Aprahamian, Pascal Mermillod, Marie Saint-Dizier
Ovarian steroid hormones are major regulators of the physiology of the oviduct and reproductive events occurring within the oviduct. To establish a whole steroid profiling of the bovine oviductal fluid (OF) during the estrous cycle, contralateral and ipsilateral (to the corpus luteum or preovulatory follicle) oviducts were classified into four stages of the estrous cycle (n = 18-27 cows per stage): postovulatory (Post-ov), mid-luteal (Mid-lut), late luteal (Late-lut), and preovulatory on the basis of the ovarian morphology and intrafollicular steroid concentrations...
October 1, 2016: Theriogenology
O J Ginther, M A R Siddiqui, J M Baldrighi
In single ovulating cattle, ipsilateral versus contralateral interovarian relationships refer to a dominant follicle (DF) and CL in the same versus opposite ovaries. The ipsilateral relationship consists of the DF-CL and the devoid (no DF or CL) intraovarian pattern, and the contralateral relationship consists of the DF pattern and the CL pattern. The DF-CL pattern involves positive effects on both the DF and CL when adjacent (≤3-mm apart) versus separated as follows: greater diameter of DF (e.g., 10.5 ± 0...
July 15, 2016: Theriogenology
Zhenjie Yuan, Yuxia Chen, Qiuyue Chen, Miao Guo, Li Kang, Guiyu Zhu, Yunliang Jiang
Extracelluar matrix undergoes constant remodeling, cell-cell, and cell-matrix interactions during chicken ovarian follicle growth, which is coordinated by matrix metalloproteinases (MMPs), and their associated endogenous inhibitors (TIMPs). Transcriptome analysis revealed upregulation of MMP13 in sexually mature chicken ovaries. In this study, we found that the expression of MMP13 in chicken ovary was stably elevated from 60 d to 159 d, and was significantly higher at 159 d than at the other three developmental stages (P < 0...
2016: G3: Genes—Genomes—Genetics
G Pugliesi, F B Santos, E Lopes, É Nogueira, J R G Maio, M Binelli
We aimed to evaluate the effects and the interaction of size of the preovulatory follicle (POF) and long-acting progesterone (P4) supplementation after timed-AI on CL function and pregnancy success in beef cows. In experiment 1, ovulations of beef cows were synchronized starting on Day -10, and cows were split to receive sodium cloprostenol (large follicle group; LF; n = 31) or nothing (small follicle group; SF; n = 35). Ovulations were induced on Day 0, and cows were inseminated. Ovulated cows were assigned to receive placebo (LF/control group, n = 14; and SF/control group, n = 9) or 150 mg of long-acting P4 on Day 4...
April 15, 2016: Theriogenology
Roberto D V S Morais, Ralph G Thomé, Hélio B Santos, Nilo Bazzoli, Elizete Rizzo
In fish ovaries, postovulatory follicles (POFs) are key biomarkers of breeding and provide an interesting model for studying the relationship between autophagy and apoptosis. In this study, we investigated the immunohistochemical expression of autophagic and apoptotic proteins to improve the knowledge on the mechanisms regulating ovarian remodeling after spawning. Females from three neotropical fish species kept in captivity were submitted to hormonal induction. After ova stripping, ovarian sections were sampled daily until 5 days postspawning (dps)...
April 1, 2016: Theriogenology
Bo Kang, Dongmei Jiang, Rong Ma, Hui He
Ferritin heavy chain (FHC), which exhibits ferroxidase activity and mediates the primary functions of ferritin, plays a role in regulating reproduction in animals. However, the changes in the FHC mRNA and protein levels in the HPG axis of geese remain to be determined. In the current study, FHC mRNA expression level was quantitatively monitored in the hypothalamus, anterior pituitary and ovary stroma in prelaying and laying geese. In addition, the levels of FHC mRNA and protein were determined in follicles and ovarian stroma of laying geese...
December 2015: Reproductive Biology
T Trapphoff, M Heiligentag, D Dankert, H Demond, D Deutsch, T Fröhlich, G J Arnold, R Grümmer, B Horsthemke, U Eichenlaub-Ritter
STUDY QUESTION: Is the postovulatory aging-dependent differential decrease of mRNAs and polyadenylation of mRNAs coded by maternal effect genes associated with altered abundance and distribution of maternal effect and RNA-binding proteins (MSY2)? SUMMARY ANSWER: Postovulatory aging results in differential reduction in abundance of maternal effect proteins, loss of RNA-binding proteins from specific cytoplasmic domains and critical alterations of pericentromeric proteins without globally affecting protein abundance...
January 2016: Human Reproduction
M F A Balaro, J F Fonseca, T G B Barbosa, J M G Souza-Fabjan, L M Figueira, T A Teixeira, L R Carvalheira, F Z Brandão
The ability of gonadotropin-releasing hormone (GnRH) to synchronize ovulation and new follicular wave emergence before a "superovulatory Day 0" protocol was assessed in Santa Inês ewes. For estrus synchronization, a 60-mg medroxyprogesterone acetate sponge was inserted for 6 d. One day before sponge removal, 37.5-μg d-cloprostenol and 300 IU equine chorionic gonadotropin were injected intramuscularly (i.m.). After sponge removal, ewes were assigned to the following 3 groups: (1) GC-1 mL saline at 12 h (n = 10); (2) G24h-0...
January 2016: Domestic Animal Endocrinology
D Groppetti, M Aralla, V Bronzo, G Bosi, A Pecile, S Arrighi
The ability to recognize specific events happening in the ovaries during periovulatory time allows optimal management of canine reproduction. The objective of this study was to assess the efficacy of vaginal cytology and blood progesterone (P4) assay to identify accurately the changes occurring at the ovarian structures, mainly during the fertile period. Tertiary follicles, corpora hemorrhagica (CHs) and corpora lutea (CLs) from forty healthy bitches undergoing ovariohysterectomy were evaluated by histo-morphometry based on their aspect, number and size...
January 2015: Animal Reproduction Science
O J Ginther, M A R Siddiqui, J M Baldrighi, M M Hoffman
The conversion of preovulatory intraovarian patterns based on location of the preovulatory follicle (PF) and the associated corpus luteum (cl) to postovulatory patterns based on location of the future and established dominant follicle (DF) and corpus luteum (CL) was studied daily in 26 heifers from Days -5 to 6 (Day 0 = ovulation). The two ipsilateral preovulatory patterns were PF-cl and devoid (neither PF nor cl), and the two contralateral patterns were PF and cl. The postovulatory patterns were DF-CL, devoid, DF, and CL...
January 15, 2015: Theriogenology
Debora Dankert, Hannah Demond, Tom Trapphoff, Martyna Heiligentag, Katrin Rademacher, Ursula Eichenlaub-Ritter, Bernhard Horsthemke, Ruth Grümmer
Maternal effect genes code for oocyte proteins that are important for early embryogenesis. Transcription in oocytes does not take place from the onset of meiotic progression until zygotic genome activation. During this period, protein levels are regulated posttranscriptionally, for example by poly(A) tail length. Posttranscriptional regulation may be impaired in preovulatory and postovulatory aged oocytes, caused by delayed ovulation or delayed fertilization, respectively, and may lead to developmental defects...
2014: PloS One
O J Ginther, M A R Siddiqui, J M Baldrighi, M M Hoffman
An intraovarian positive physiologic coupling between the extant CL and the ipsilateral preovulatory follicle (PF) or the future or established postovulatory dominant follicle (DF) was studied in 26 heifers. Ovaries were scanned by ultrasonic imaging from Day 16 (Day 0 = ovulation) of the preovulatory period until Day 6 of the postovulatory period. Hemodynamics of the follicles and CL were assessed by color-Doppler ultrasonography. When the PF and CL were ipsilateral compared with contralateral, blood-flow resistance in wall of the PF was lower (P < 0...
October 1, 2014: Theriogenology
Y K Press, R S McBride, M J Wuenschel
Winter flounder Pseudopleuronectes americanus were collected at monthly intervals from December 2009 to May 2011, to describe the pattern and seasonality of oocyte development, including: (1) the group-synchronous transition from primary to secondary oocytes that initiates immediately after spawning, (2) the slow (months) development of vitellogenic oocytes followed by the rapid (weeks) maturation of oocytes, (3) the synchronous nature of mature oocytes ovulating, but the discrete releases of benthic eggs in batches, (4) the protracted (months) degradation of postovulatory follicles and (5) the occurrence of follicular atresia...
August 2014: Journal of Fish Biology
Muraly Puttabyatappa, Terry A Jacot, Linah F Al-Alem, Katherine L Rosewell, Diane M Duffy, Mats Brännström, Thomas E Curry
An intrafollicular increase in proteolytic activity drives ovulatory events. Surprisingly, the periovulatory expression profile of the membrane-type matrix metalloproteinases (MT-MMPs), unique proteases anchored to the cell surface, has not been extensively examined. Expression profiles of the MT-MMPs were investigated in ovarian tissue from well-characterized rat and macaque periovulatory models and naturally cycling women across the periovulatory period. Among the six known MT-MMPs, mRNA expression of Mmp14, Mmp16, and Mmp25 was increased after human chorionic gonadotropin (hCG) administration in rats...
August 2014: Biology of Reproduction
Xin Yuan, Lu Xia, Xia Dong, Shenqiang Hu, Yingying Zhang, Fang Ding, Hehe Liu, Liang Li, Jiwen Wang
The transcription factors GATA-4 and GATA-6, members of the GATA family, play an important role in ovarian cell proliferation, differentiation and apoptosis. In this study, the full-length coding sequences of goose GATA-4 and GATA-6 were cloned and characterized. GATA-4 and GATA-6 consist of 1236 and 1104 nucleotides encoding proteins with 411 and 367 amino acids, respectively. The deduced amino acid sequences of both proteins include two adjacent zinc finger domains with the distinctive form (CVNC-X17-CNAC)-X29-(CANC-X17-CNAC) and share 84...
April 24, 2014: Journal of Reproduction and Development
Guiyu Zhu, Li Kang, Qingqing Wei, Xinxing Cui, Shouzhi Wang, Yuxia Chen, Yunliang Jiang
Matrix metalloproteinases (MMPs) are a specific class of proteolytic enzymes that play critical roles in follicular development and luteinization in mammals. However, the role of MMPs in avian ovary remains largely unknown. We found that three MMP genes (MMP1, MMP3, and MMP9) were significantly up-regulated in 23-wk-old (laying phase) chicken ovaries compared with 6-wk-old ovaries (prepubertal phase). In reproductively active chicken ovary, MMP1 expression (both mRNA and protein) remained low in prehierarchical and preovulatory follicles but increased in postovulatory follicles (POFs)...
March 2014: Biology of Reproduction
H He, D M Jiang, B Kang, R Ma, L Bai, X Wang, L Zhao
Melatonin (N-acetyl-5-methoxytryptamine), an indole hormone, regulates a variety of important central and peripheral actions related to circadian rhythms and reproduction through its specific receptor subtypes (Mel-1a, Mel-1b and Mel-1c). However, the expression profile of melatonin receptor genes (MTNR1A, MTNR1B and MTNR1C) in ovarian hierarchical follicles of geese remains to be clarified. In this study, the expression level of melatonin receptors in small white follicle (SWF), small yellow follicle (SYF), the largest follicle (F1), second largest (F2), third largest (F3), fourth largest (F4), fifth largest (F5), and postovulatory follicle (POF) in the Sichuan white goose were examined using quantitative real-time PCR (qRT-PCR)...
February 2014: Animal Reproduction Science
Marli Amin, Ariel Simerman, Michele Cho, Prapti Singh, Christine Briton-Jones, David Hill, Tristan Grogan, David Elashoff, Nigel J Clarke, Gregorio D Chazenbalk, Daniel A Dumesic
CONTEXT: Mineralocorticoid synthesis by the nonhuman primate periovulatory follicle enhances luteinization. Whether a similar event occurs in women undergoing in vitro fertilization (IVF) is unknown. OBJECTIVE: The objective of the study was to determine whether human luteinized granulosa cells (LGCs) produce mineralocorticoids derived from 21-hydroxylase activity and also express mRNA for 21-hydroxylase and the mineralocorticoid receptor. DESIGN: This was a prospective cohort study...
April 2014: Journal of Clinical Endocrinology and Metabolism
Bo Kang, Dong Mei Jiang, Lin Bai, Hui He, Rong Ma
The ENO1 gene encodes a multifunctional enzyme that has been identified as a key component of the glycolytic pathway. Our previous studies demonstrated that ENO1 gene expression was higher in the ovaries of laying geese compared with prelaying geese. However, the molecular characterisation and expression profiling of the ENO1 gene in geese tissues and ovarian follicles remain to be determined. In this study, ENO1 cDNA (1,445 bp long) of the Sichuan white goose was cloned and characterised. The ORF of ENO1 cDNA is 1,305 bp in length and encodes a 434 amino acid protein with a molecular weight of 47...
2014: Molecular Biology Reports
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