keyword
MENU ▼
Read by QxMD icon Read
search

dominant follicle

keyword
https://www.readbyqxmd.com/read/28181120/comparison-of-three-superovulation-protocols-with-or-without-gnrh-treatment-at-the-time-of-artificial-insemination-on-ovarian-response-and-embryo-quality-in-thai-native-heifers
#1
Vibuntita Chankitisakul, Jakkhaphan Pitchayapipatkul, Phirawit Chuawongboon, Dumrongrak Rakwongrit, Denpong Sakhong, Wuttigrai Boonkum, Thevin Vongpralub
To optimize the superovulation protocol in Thai native cattle, the present research was designed to (1) compare three different protocols designed to induce superstimulation and (2) study the effect of gonadotropin-releasing hormone (GnRH) administration at insemination time (to induce ovulation) on ovarian follicular activities in terms of the number of large follicles, corpora lutea (CLs) and unovulated follicles, and the number and quality of ova/embryos recovered in Thai native heifers. Initially, the estrous cycles of animals (n = 36) at unknown stages were synchronized by two prostaglandin F2α (PGF2α) injections at an interval of 12 days...
February 8, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28163019/interrelationships-between-ovarian-follicles-grown-in-culture-and-possible-mediators
#2
Alexander V Sirotkin, Iveta Florkovičová Koničková, Hans-Jorg Schaeffer, Jozef Laurincik, Abdel Halim Harrath
Dominance or cooperation between ovarian follicles can determine the number of ovulations and fecundity, but interrelationships between follicles in mono- and poly-ovulatory species and their mechanisms are poorly understood. The goals of this work were to determine the existence and compare the character of mutual influence of cultured ovarian follicles from a mono-ovulatory species (cow) with established follicular dominance with those from a poly-ovulatory species (pig), in which interrelationship between follicles remain unknown, and to examine the role of ovarian cell proliferation, the insulin-like growth factor I (IGF-I)- oxytocin (OT) system, and steroid hormones in mediating interrelationships among ovarian follicles...
February 2, 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28113119/systemic-and-intrafollicular-components-of-follicle-selection-in-mares
#3
REVIEW
O J Ginther
Mares are superb models for study of follicle selection owing to similarities between mares and women in relative follicle diameters at specific events during the follicular wave and follicle accessibility for experimental sampling and manipulation. Usually, only 1 major follicular wave with a dominant follicle (DF) greater than 30 mm develops during the 22 to 24 d of the equine estrous cycle and is termed the primary or ovulatory wave. A major secondary wave occasionally (25%) develops early in the cycle...
December 22, 2016: Domestic Animal Endocrinology
https://www.readbyqxmd.com/read/28107851/effect-of-vitamin-d-supplementation-on-polycystic-ovary-syndrome-a%C3%A2-systematic-review-and-meta-analysis-of-randomized-controlled-trials
#4
REVIEW
Fang Fang, Ke Ni, Yiting Cai, Jin Shang, Xiaoke Zhang, Chengliang Xiong
OBJECTIVE: To evaluate the effect of vitamin D supplementation on patients with PCOS. METHODS: We performed a literature search in database and identified all of the RCTs published before December 2015 that compared the effect of vitamin D supplementation with placebo or metformin in PCOS patients. MAIN RESULTS: Nine out of 463 identified studies were included, involving 502 women presenting with PCOS. Vitamin D supplementation had significant effect on the improvement of follicular development with a higher number of dominant follicles (OR, 2...
February 2017: Complementary Therapies in Clinical Practice
https://www.readbyqxmd.com/read/28107821/effects-of-a-single-20%C3%A2-mg-dose-of-letrozole-on-ovarian-function-post-dominant-follicle-selection-an-exploratory-randomized-controlled-trial
#5
H C M Allaway, D R Chizen, G P Adams, R A Pierson
BACKGROUND: Our objective was to explore the impact of a single dose of an aromatase inhibitor (letrozole) administered at defined times of the follicular phase or immediately after ovulation on dominant follicle development, luteogenesis and new follicle wave emergence. METHODS: A prospective pilot study using a randomized complete block, controlled, open label design was conducted at an academic clinical research center. Forty-five healthy, female volunteers (25...
January 21, 2017: Journal of Ovarian Research
https://www.readbyqxmd.com/read/28090459/anti-m%C3%A3-llerian-hormone-as-a-predictor-of-polycystic-ovary-syndrome-treated-with-clomiphene-citrate
#6
Andon Hestiantoro, Yuwono Sri Negoro, Yohana Afrita, Budi Wiweko, Kanadi Sumapradja, Muharam Natadisastra
OBJECTIVE: This study aimed to determine the threshold of anti-Müllerian hormone (AMH) as predictor of follicular growth failure in polycystic ovary syndrome (PCOS) patients treated with clomiphene citrate (CC). METHODS: Fifty female subjects with PCOS were recruited and divided into two groups based on successful and unsuccessful follicular growth. Related variables such as age, infertility duration, cigarette smoking, use of Moslem hijab, sunlight exposure, fiber intake, body mass index, waist circumference, AMH level, 25-hydroxy vitamin D level, and growth of dominant follicles were obtained, assessed, and statistically analyzed...
December 2016: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/28088414/social-dominance-in-prepubertal-dairy-heifers-allocated-in-continuous-competitive-dyads-effects-on-body-growth-metabolic-status-and-reproductive-development
#7
C Fiol, M Carriquiry, R Ungerfeld
The objective of this study was to compare the body weight (BW) and size, metabolic status, and reproductive development of dominant and subordinate prepubertal dairy heifers allocated in competitive dyads. Sixteen Holstein and Jersey × Holstein prepubertal heifers (means ± SEM; 250.8 ± 9.8 d; 208.5 ± 13.9 kg of BW) were assigned to 8 homogeneous dyads according to breed, age, and BW. Dyads were housed in pens separated 1 m from each other during 120 d, receiving a total mixed ration on a 5% restriction of their potential dry matter intake, and had access to the same feeder (60 cm) throughout the experiment...
March 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28043358/the-acute-effect-of-intravenous-lipopolysaccharide-injection-on-serum-and-intrafollicular-hdl-components-and-gene-expression-in-granulosa-cells-of-the-bovine-dominant-follicle
#8
Felipe Terres de Campos, Joao Aveiro Alvarado Rincon, Diego Andres Velasco Acosta, Pedro Augusto Silva Silveira, Jorgea Pradieé, Marcio Nunes Corrêa, Bernardo Garziera Gasperin, Luiz Francisco Machado Pfeifer, Carlos Castilho Barros, Ligia Margareth Cantareli Pegoraro, Augusto Schneider
The aim of this study was to evaluate the effect of an acute systemic inflammatory response induced by lipopolysaccharide (LPS) in the serum and follicular fluid (FF) high-density lipoprotein (HDL) components, hormone concentrations and granulosa cell gene expression. For this purpose, twenty non-lactating Jersey dairy cows were submitted to a progesterone (P4) - estradiol (E2) based synchronization protocol. Cows received a single i.v. dose of LPS (2.5 μg/kg of body weight) or saline solution (CTL Group) 2 h after P4 insert removal...
February 2017: Theriogenology
https://www.readbyqxmd.com/read/28042411/clomiphene-citrate-treatment-cycle-outcomes-of-polycystic-ovary-syndrome-patients-based-on-basal-high-sensitive-c-reactive-protein-levels-a-cross-sectional-study
#9
Serkan Kahyaoglu, Omer Hamid Yumuşak, Sebnem Ozyer, Meryem Kuru Pekcan, Merve Erel, Mahmut Nedim Cicek, Salim Erkaya, Yasemin Tasci
BACKGROUND: Polycystic ovary syndrome (PCOS) is highly associated with an ovulatory infertility, features of the metabolic syndrome, including obesity, insulin resistance and dyslipidemia. Serum concentrations of high sensitive C-reactive protein (hs-CRP) were significantly higher in obese than in non-obese PCOS patients at baseline, suggesting a relationship between elevated hs-CRP levels and obesity. The aim of this study was to evaluate whether cycle day 3 hs-CRP levels before clomiphene citrate (CC) treatment would predict cycle outcomes in women with PCOS...
January 2017: International Journal of Fertility & Sterility
https://www.readbyqxmd.com/read/28040605/g-protein-coupled-receptor-34-in-ovarian-granulosa-cells-of-cattle-changes-during-follicular-development-and-potential-functional-implications
#10
L J Spicer, L F Schütz, J A Williams, N B Schreiber, J R Evans, M L Totty, J N Gilliam
Abundance of G protein-coupled receptor 34 (GPR34) mRNA is greater in granulosa cells (GCs) of cystic vs normal follicles of cattle. The present experiments were designed to determine if GPR34 mRNA in granulosa cell [GC] changes during selection and growth of dominant follicles in cattle as well as to investigate the hormonal regulation of GPR34 mRNA in bovine GC in vitro. In Exp. 1, estrous cycles of nonlactating cows were synchronized and then ovariectomized on either day 3-4 or 5-6 after ovulation. GPR34 mRNA abundance in GC was 2...
December 11, 2016: Domestic Animal Endocrinology
https://www.readbyqxmd.com/read/28012607/do-demodex-mites-play-a-role-in-pterygium-development
#11
Witold Tarkowski, Joanna Moneta-Wielgoś, Daniel Młocicki
Numerous reports point to Demodex mites as the aetiology of certain eye and skin conditions, hence it is highly probable that infestation with these mites may also play a role in the aetiology and pathogenesis of pterygium. Therefore here we present a hypothesis: whether the presence of Demodex mites in eyelash hair follicles significantly correlates with the presence of pterygia, which could point to a potential role of these mites in the development of such lesions. We present preliminary data for supporting this hypothesis...
January 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28004024/transcriptomes-of-bovine-ovarian-follicular-and-luteal-cells
#12
Sarah M Romereim, Adam F Summers, William E Pohlmeier, Pan Zhang, Xiaoying Hou, Heather A Talbott, Robert A Cushman, Jennifer R Wood, John S Davis, Andrea S Cupp
Affymetrix Bovine GeneChip® Gene 1.0 ST Array RNA expression analysis was performed on four somatic ovarian cell types: the granulosa cells (GCs) and theca cells (TCs) of the dominant follicle and the large luteal cells (LLCs) and small luteal cells (SLCs) of the corpus luteum. The normalized linear microarray data was deposited to the NCBI GEO repository (GSE83524). Subsequent ANOVA determined genes that were enriched (≥2 fold more) or decreased (≤-2 fold less) in one cell type compared to all three other cell types, and these analyzed and filtered datasets are presented as tables...
February 2017: Data in Brief
https://www.readbyqxmd.com/read/28002761/an-intraovarian-mechanism-that-enhances-the-effect-of-an-fsh-surge-on-recovery-of-subordinate-follicles-in-heifers
#13
O J Ginther, M A R Siddiqui, J M Baldrighi, E R Araujo
The effect of the future dominant follicle (DF), corpus luteum (CL), and side (left ovary [LO] and right ovary [RO]) on FSH-induced recovery (increase in diameter) of regressing subordinate follicles was studied in heifers. The DF of wave 2 and the largest subordinate follicle remained intact (controls, n = 14 heifers) or were ablated (n = 14 heifers) on a mean of 13 d postovulation when the DF was ∼10 mm (hour 0). Concentration of FSH (P < 0.0004) and diameter of subordinate follicles (P < 0.0002) decreased between hours -48 to 0 combined for the control and ablation groups...
October 27, 2016: Domestic Animal Endocrinology
https://www.readbyqxmd.com/read/28002600/differential-expression-of-toll-like-receptors-in-goat-dominant-and-nondominant-follicles
#14
G X E, Y J Zhao, Y H Ma, M X Chu, Q H Hong, S J Lv, L Zhu, F K Li, Y G Han, X Wu, Y F Huang
The mechanism of dominant follicle selection is unclear because of its physiological complexity. However, some studies have reported that the immune system plays an important role in reproductive physiology. The objective of the current study was to investigate the differential expression of Toll-like receptors (TLRs) in the dominant (DFs) and nondominant follicles (NFs), and to determine the correlation between the expression of TLRs and the related genes, such as WNT4 and FOXL2. In this comparative study, the expression levels of TLRs, WNT4, and FOXL2 genes of DFs and NFs were obtained from three Dazu black goats were estimated using the real-time PCR...
December 19, 2016: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/27997335/intrafollicular-oestradiol-production-expression-of-the-lh-receptor-lhr-gene-and-its-isoforms-and-early-follicular-deviation-in-bos-indicus
#15
S Wohlres-Viana, E K N Arashiro, M A Machado, L S A Camargo, L G B Siqueira, M P Palhao, J H M Viana
The aim of the present study was to characterise the roles of intrafollicular oestradiol production and granulosa cell (GC) expression of the LH receptor (LHR) gene and its isoforms during follicular deviation in Bos indicus. Follicular wave emergence was synchronised in heifers from a Bos taurus dairy (Holstein; n=10) and a B. indicus dairy breed (Gir; n=10). Follicles were aspirated individually at sizes corresponding to the periods of predeviation, deviation and postdeviation. Intrafollicular oestradiol (IF-E2) and progesterone (IF-P4) concentrations were determined in the follicular fluid (FF) by radioimmunoassay, and relative expression of P450 aromatase (CYP19A1) and LHR forms was evaluated in GC using real-time quantitative-polymerase chain reaction...
December 21, 2016: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/27987358/relationship-between-anti-m%C3%A3-llerian-hormone-and-antral-follicle-count-across-the-menstrual-cycle-using-the-beckman-coulter-access-assay-in-comparison-with-gen-ii-manual-assay
#16
Julia Schiffner, Judith Roos, David Broomhead, Joseph van Helden, Erhard Godehardt, Daniel Fehr, Günter Freundl, Sarah Johnson, Christian Gnoth
BACKGROUND: The study aim was to validate Beckman Coulter's fully automated Access Immunoassay System (BC Access assay) for anti-Müllerian hormone (AMH) and compare it with Beckman Coulter's Modified Manual Generation II assay (BC Mod Gen II), with regard to cycle AMH fluctuations and antral follicle counts. METHODS: During one complete menstrual cycle, transvaginal ultrasound was performed on regularly menstruating women (n=39; 18-40years) every 2 days until the dominant ovarian follicle reached 16mm, then daily until observed ovulation; blood samples were collected throughout the cycle...
December 17, 2016: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/27900998/novel-mutations-in-psenen-gene-in-two-chinese-acne-inversa-families-manifested-as-familial-multiple-comedones-and-dowling-degos-disease
#17
Cheng Zhou, Guang-Dong Wen, Lwin Myint Soe, Hong-Jun Xu, Juan Du, Jian-Zhong Zhang
BACKGROUND: Acne inversa (AI), also called hidradenitis suppurativa, is a chronic, inflammatory, recurrent skin disease of the hair follicle. Familial AI shows autosomal-dominant inheritance caused by mutations in the γ-secretase genes. This study was aimed to identify the specific mutations in the γ-secretase genes in two Chinese families with AI. METHODS: In this study, two Chinese families with AI were investigated. All the affected individuals in the two families mainly manifested with multiple comedones, pitted scars, and a few inflammatory nodules on their face, neck, trunk, axilla, buttocks, upper arms, and thighs...
2016: Chinese Medical Journal
https://www.readbyqxmd.com/read/27866148/identification-of-genes-mediating-drosophila-follicle-cell-progenitor-differentiation-by-screening-for-modifiers-of-gal4-uas-variegation
#18
Ming-Chia Lee, Andrew D Skora, Allan C Spradling
The Drosophila melanogaster ovarian follicle cell lineage provides a powerful system for investigating how epigenetic changes contribute to differentiation. Downstream from an epithelial stem cell, follicle progenitors undergo nine mitotic cell cycles before transitioning to the endocycle and initiating differentiation. During their proliferative phase, follicle progenitors experience Lsd1-dependent changes in epigenetic stability that can be monitored using GAL4::UAS variegation. Eventually, follicle progenitors acquire competence to respond to Delta, a Notch ligand present in the environment, which signals them to cease division and initiate differentiation...
January 5, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/27865446/use-of-utrogestan-during-controlled-ovarian-hyperstimulation-in-normally-ovulating-women-undergoing-in%C3%A2-vitro-fertilization-or-intracytoplasmic-sperm-injection-treatments-in-combination-with-a-freeze-all-strategy-a-randomized-controlled-dose-finding-study-of
#19
Xiuxian Zhu, Hongjuan Ye, Yonglun Fu
OBJECTIVE: To compare the clinical characteristics in a Utrogestan and hMG protocol with the use of different doses of Utrogestan in normally ovulating women undergoing in vitro fertilization (IVF) or intracytoplasmic sperm injection (ICSI) treatments. DESIGN: Prospective controlled study. SETTING: Tertiary-care academic medical center. PATIENT(S): A total of 150 infertile patients undergoing IVF/ICSI treatments. INTERVENTION(S): Utrogestan and hMG were administered simultaneously beginning on cycle day 3...
February 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/27865418/characterizing-emergence-and-divergence-in-the-first-follicular-wave-in-a-tropically-adapted-bos-taurus-breed
#20
Rodrigo Dorneles Tortorella, Guilherme de Paula Nogueira, Mairon Rocha Modesto, Priscilla Cristine Passoni Silva, Joseane Padilha da Silva, Jairo Pereira Neves, Alexandre Floriani Ramos
Tropically adapted Bos taurus breeds are descended from the cattle which were brought from the Iberian Peninsula to Latin America by the colonizers and which adapted over time to local conditions. These breeds have become a genetic treasure that must be preserved. The objective of this study was to characterize ovarian follicular emergence and divergence in tropically adapted B. taurus cows and heifers. Cyclic heifers (n = 11) and nonlactating, multiparous cows (n = 11) were examined at 8-hour intervals using ultrasonography starting on the day following the final application of PGF2α, which was used to synchronize the estrous cycle, and ending 5 days after ovulation...
January 15, 2017: Theriogenology
keyword
keyword
86080
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"