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https://www.readbyqxmd.com/read/28813095/evaluation-of-cell-proliferation-and-endometrial-thickness-of-bitches-in-different-periods-of-diestrus
#1
Vanessa S A Gossler, Francislaine A G Santos, Aline R DE Azevedo, Priscila C Gonçalves, Hugo A Rigolo, Cleonice Trevisan, Ana Paula B Masseno, Ana Paula M M Cardoso, Paula C Papa, Caliê Castilho, Ines C Giometti
This study aimed to determine the histological features of the endometrium of bitches, as well as the cell proliferation at specific moments of diestrus, 10, 20, 30, 40, 50 and 60 days post ovulation, correlating the endometrial thickness with the uterine cell proliferation and the metabolic state (weight, blood glucose and plasma cholesterol) of the animals. Therefore, the right and left uterine horns of 26 clinically healthy bitches submitted to ovariohysterectomy were histologically analyzed 10, 20, 30, 40, 50 and 60 days post ovulation...
August 14, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28807003/overexpression-of-mir-21-in-stem-cells-improves-ovarian-structure-and-function-in-rats-with-chemotherapy-induced-ovarian-damage-by-targeting-pdcd4-and-pten-to-inhibit-granulosa-cell-apoptosis
#2
Xiafei Fu, Yuanli He, Xuefeng Wang, Dongxian Peng, Xiaoying Chen, Xinran Li, Qing Wang
BACKGROUND: Chemotherapy-induced premature ovarian failure (POF) is a severe complication affecting tumor patients at a childbearing age. Mesenchymal stem cells (MSCs) can partially restore the ovarian structure and function damaged by chemotherapy. miR-21 is a microRNA that can regulate cell apoptosis. This study discusses the repair effect and mechanism of MSCs overexpressing miR-21 on chemotherapy-induced POF. METHODS: Rat MSCs and granulosa cells (GCs) were isolated in vitro...
August 14, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28801854/how-do-red-and-infrared-low-level-lasers-affect-folliculogenesis-cycle-in-rat-s-ovary-tissue-in-comparison-with-clomiphene-under-in-vivo-condition
#3
Paria Naseri, Alireza Alihemmati, Seyed Hossein Rasta
Folliculogenesis is a cycle that produces the majority of oocyte. Any disruption to this cycle leads to ovulation diseases, like polycystic ovarian syndrome (PCOS). Treatments include drugs and surgery; lasers have also been used complementarily. Meanwhile, still there is no definite treatment for PCOS. This study investigated the photo-bio stimulation effect of near-infrared and red low-level laser on producing follicles and compared the result with result of using common drug, clomiphene. Therefore, the aim of this study was to propose the use of lasers autonomously treatment...
August 11, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28801297/-effect-of-metformin-on-insulin-resistance-during-catch-up-growth-in-mice-with-fetal-growth-restriction
#4
Ping Peng, Chun-Ling Ma, Shu-Mei Wan, Wen-Sheng Jin, Yan Gao, Tian-Qing Huang, Qi Cheng, Chang-Lan Ye
OBJECTIVE: To study the efficacy of metformin intervention on insulin resistance during catch-up growth in mice with fetal growth restriction (FGR). METHODS: Mouse models of FGR were established by low protein diet feeding of the pregnant mice. Both the newborn female mice with FGR and normal control (NC) mice were randomized for feeding with a standard diet (SF) or a high-fat diet (HF) after weaning and treatment with gavage of either metformin or normal saline...
August 20, 2017: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/28780483/alteration-of-the-pi3k-akt-signaling-pathway-by-swainsonine-affects-17%C3%AE-estradiol-secretion-in-ovary-cells
#5
Chenchen Wu, Dujian Yan, Dezhang Lu, Tiesuo Han, Baoyu Zhao
BACKGROUND: The ingestion of locoweed that contains the toxic indolizidine alkaloid swainsonine (SW) disrupts ovarian function, accompanied by delayed estrus, increased estrous cycle length, delayed conception, and abortion. GOALS: The direct effects of SW on ovary cell steroidogenesis remain unclear. MATERIALS AND METHODS: In this study, Chinese hamster ovary (CHO) cells were used to investigate the effects of SW on estradiol (E2) secretion and cell viability and the mechanisms involved in these processes...
July 26, 2017: Theriogenology
https://www.readbyqxmd.com/read/28765080/activation-of-extrasynaptic-%C3%AE-gabaa-receptors-globally-or-within-the-posterior-vta-has-estrous-dependent-effects-on-consumption-of-alcohol-and-estrous-independent-effects-on-locomotion
#6
Laverne C Melón, Zachary T Nolan, Delphine Colar, Eileen M Moore, Stephen L Boehm
Recent reports support higher than expected rates of binge alcohol consumption among women and girls. Unfortunately, few studies have assessed the mechanisms underlying this pattern of intake in females. Studies in males suggest that alcohol concentrations relevant to the beginning stages of binge intoxication may selectively target tonic GABAergic inhibition mediated by GABAA receptor subtypes expressing the δ-subunit protein (δ-GABAAR). Indeed, administration of agonists that interact with these δ-GABAAR prior to alcohol access can abolish binge drinking behavior in male mice...
July 29, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28763724/ovarian-dynamics-and-estrous-cycle-length-in-the-donkey-equus-asinus
#7
Maricruz Díaz-Duran, Luis Zarco, Ana Myriam Boeta
Nine jennies were monitored daily by ultrasonography during three complete ovarian cycles in order to evaluate if the timing of luteolysis and the growth pattern of the ovulatory follicle (OVF) before, during and after luteolysis are related to the length of the interovulatory interval (IOI). Blood samples for progesterone determination were obtained daily during one of the cycles of each jenny. The cycles were classified according to the length of the IOI into three groups: Short IOI (21.2 ± 0.3 d, n = 10), medium IOI (23...
July 10, 2017: Theriogenology
https://www.readbyqxmd.com/read/28759835/characterizing-the-reproductive-biology-of-the-female-pygmy-hippopotamus-choeropsis-liberiensis-through-non-invasive-endocrine-monitoring
#8
Gabriella L Flacke, Franz Schwarzenberger, Linda M Penfold, Susan L Walker, Graeme B Martin, Robert Peter Millar, Monique C J Paris
The pygmy hippopotamus (Choeropsis liberiensis) is endangered in the wild and very little is known about its reproductive biology. In zoological facilities, this species experiences a number of reproductive issues that complicate breeding management, including a high rate of stillbirths and failure of many pairs to reproduce. We conducted a comprehensive study to evaluate reproductive cycles and pregnancy in this species using enzyme immunoassays (EIAs) for fecal hormone metabolite analysis. Fresh fecal samples were collected twice weekly for a one to three year period from 36 female pygmy hippos housed at 24 zoological institutions...
July 19, 2017: Theriogenology
https://www.readbyqxmd.com/read/28753494/ovarian-steroids-oxytocin-and-tumor-necrosis-factor-modulate-equine-oviduct-function
#9
P Pinto-Bravo, A Galvão, M R Rebordão, A Amaral, D Ramilo, E Silva, A Szóstek-Mioduchowska, G Alexandre-Pires, R Roberto da Costa, D J Skarzynski, G Ferreira-Dias
The oviduct plays important roles in the early reproductive process. The aim of this study was to evaluate gene transcription and protein expression of progesterone receptor (PGR), estrogen receptors 1 (ESR1) and 2 (ESR2); oxytocin receptor (OXTR); prostaglandin F2α synthase (AKR1C3), and prostaglandin E2 synthase (Ptges) in mare oviduct in different estrous cycle stages. Estradiol (E2), progesterone (P4), oxytocin (OXT), and tumor necrosis factor α (TNF) effect on in vitro PGE2 and prostaglandin F2α (PGF2α) secretion by equine oviduct explants or by oviductal epithelial cells (OECs) were also assessed...
June 24, 2017: Domestic Animal Endocrinology
https://www.readbyqxmd.com/read/28735074/increased-ventilation-in-female-erythropoietin-deficient-mouse-line-is-not-progesterone-and-estrous-stage-dependent
#10
Florine Jeton, Jorge Soliz, Dominique Marchant, Vincent Joseph, Jean-Paul Richalet, Aurélien Pichon, Nicolas Voituron
Previous studies suggest that chronic erythropoietin (Epo) deficiency in male mice does not alter normoxic/hypoxic ventilation. As effects of Epo are sex specific and as progesterone could be a respiratory stimulant, we evaluated the impact of Epo deficiency and its possible interaction with progesterone in ventilatory control in female mice during estrous cycle phases. Compared to wild type (WT) animals, Epo-TAg(h) female mice exhibited higher ventilation in hypoxia. However, when data were separated into luteal and follicular phases of the estrous cycle, basal ventilation and hypoxic ventilation were not different in both mice strains...
July 19, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28734970/genetic-variation-in-low-dose-effects-of-neonatal-des-exposure-in-female-rats
#11
Hideo Ohmukai, Tsukasa Negura, Shigehiro Tachibana, Ryo Ohta
To confirm genetic variation in low-dose effects of diethylstilbestrol (DES), two inbred strains of rats, which have been selectively bred for high- and low-avoidance learning (HAA and LAA, respectively), were used in this study. LAA rats characteristically show later sexual maturation, earlier reproductive senescence, and lower body weight as compared to HAA rats. Female neonates of each strain were daily administered DES by oral gavage at doses of 0 (vehicle only), 0.05 and 0.5μg/kg for the first 5days after birth...
July 19, 2017: Reproductive Toxicology
https://www.readbyqxmd.com/read/28729138/spatial-working-memory-in-the-touchscreen-operant-platform-is-disrupted-in-female-rats-by-ovariectomy-but-not-estrous-cycle
#12
Alyssa M Sbisa, Andrea Gogos, Maarten van den Buuse
Learning and memory deficits have been described in rats and mice after ovariectomy (OVX) and across the estrous cycle. Preclinical researchers therefore often avoid using female animals and, consequently, a large male bias exists in the preclinical cognitive literature. In the present study we examined the role of sex hormones in the touchscreen operant platform using the spatial working memory trial unique nonmatching-to-location (TUNL) task. Twenty-nine Long Evans rats were trained to acquire the TUNL task including three incremental spatial separations (S0, S1, S2)...
July 17, 2017: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/28722251/alteration-in-the-relationship-between-tanycytes-and-gonadotropin-releasing-hormone-gnrh-neurosecretory-terminals-following-long-term-metabolic-manipulation-in-the-sheep
#13
Robert Pouchain Ribeiro Neto, Iain J Clarke, Gregory Conductier
The activity of the hypothalamo-pituitary gonadal (HPG) axis is influenced by energy reserves, such that an increase or a decrease in adiposity may perturb the secretion and action of GnRH. This is thought to be due to the signalling of hormones such as leptin, which act upon neuronal systems controlling GnRH secretion. Other work shows plasticity in the relationship between tanycytes and GnRH neurosecretory terminals in the median eminence across the estrous cycle and we hypothesised that similar plasticity may occur with altered metabolic status...
July 19, 2017: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/28722155/metabolite-availability-as-a-window-to-view-the-early-embryo-microenvironment-in-vivo
#14
REVIEW
Kailun Hu, Yang Yu
A preimplantation embryo exists independent of blood supply, and relies on energy sources from its in vivo environment (e.g. oviduct and uterine fluid) to sustain its development. The embryos can survive in this aqueous environment because it contains amino acids, proteins, lactate, pyruvate, oxygen, glucose, antioxidants, ions, growth factors, hormones, and phospholipids - albeit the concentration of each component varies by species, stage of the estrous cycle, and anatomical location. The dynamic nature of this environment sustains the early development from the one-cell zygote to blastocyst, and is reciprocally influenced by the embryo at each embryonic stage...
July 19, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/28720311/evaluation-of-changes-in-blood-flow-of-the-uterine-artery-by-doppler-ultrasonography-during-the-estrous-cycle-in-lactating-bos-indicus-cows
#15
Mubbashar Hassan, Abdul Sattar, Muhammad Bilal, Muhammad Avais, Nasim Ahmad
The objective of this study was to evaluate the changes in uterine blood flow (UBF) based on the resistance index (RI) and the pulsatility index (PI) by Doppler ultrasonography throughout the estrous cycle in lactating Sahiwal cows (n=9). Cows were randomly selected during their spontaneous estrus. UBF was examined on alternate days in all cows during the estrous cycle. The results revealed that the mean RI values were higher (P<0.05) on day -1 (estrus) than on day 0 (ovulation). The mean RI values followed a consistent pattern on days 2, 4, 6, and 8 (metestrus to early diestrus) and were lower (P<0...
July 9, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28708524/follicular-waves-and-hormonal-profiles-during-the-estrous-cycle-of-carriers-and-non-carriers-of-the-trio-allele-a-major-bovine-gene-for-high-ovulation-and-fecundity
#16
Alvaro García-Guerra, Brian W Kirkpatrick, Milo C Wiltbank
A high fecundity bovine genotype has recently been discovered and genetic mapping indicates evidence for segregation of a major gene with influence on ovulation rate located on bovine chromosome 10. Cattle carrying the high fecundity allele, referred to as the Trio allele, have multiple ovulations while half-sibling, non-carriers generally have single ovulations. The present study was designed to evaluate follicle wave patterns and associated circulating hormones during the estrous cycle of Trio allele carriers (n = 7) and non-carrier half-sib controls (n = 5)...
June 1, 2017: Theriogenology
https://www.readbyqxmd.com/read/28708520/ovulation-rate-antral-follicle-count-and-circulating-anti-m%C3%A3-llerian-hormone-in-trio-allele-carriers-a-novel-high-fecundity-bovine-genotype
#17
Alvaro García-Guerra, Jéssica C L Motta, Leonardo F Melo, Brian W Kirkpatrick, Milo C Wiltbank
High fecundity genotypes in sheep are a valuable model to study the physiological mechanisms underlying follicle selection and the control of ovulation rate. Similar genotypes in cattle had not been described until the recent identification of a major bovine allele, termed Trio, which had a large effect on ovulation rate. The present study was designed to evaluate ovulation rate, antral follicle count (AFC), circulating ant-müllerian hormone (AMH), and the association among these measures in unstimulated and superstimulated Trio carrier cattle...
June 3, 2017: Theriogenology
https://www.readbyqxmd.com/read/28708491/different-enzymatic-antioxidative-pathways-operate-within-the-sheep-caruncular-and-intercaruncular-endometrium-throughout-the-estrous-cycle-and-early-pregnancy
#18
K H Al-Gubory, P Faure, C Garrel
There has been a growing interest in the role played by antioxidant enzymes in the regulation of endometrial function in mammals. However, little is known about enzymatic antioxidative pathways involved in conditioning the cyclic and early pregnant endometrium for conceptus attachment and implantation in domestic ruminants. We aimed to investigate changes in activities of superoxide dismutase 1 and 2 (SOD1, SOD2), glutathione peroxidase (GPX), glutathione reductase (GR) and catalase (CAT) in sheep caruncles (CAR) and intercaruncles (ICAR) endometrial tissues of cyclic and early pregnant ewes...
June 1, 2017: Theriogenology
https://www.readbyqxmd.com/read/28704429/effects-of-coconut-oil-on-glycemia-inflammation-and-urogenital-microbial-parameters-in-female-ossabaw-mini-pigs
#19
Annie E Newell-Fugate, Katherine Lenz, Cassandra Skenandore, Romana A Nowak, Bryan A White, Andrea Braundmeier-Fleming
Forty percent of American women are obese and at risk for type II diabetes, impaired immune function, and altered microbiome diversity, thus impacting overall health. We investigated whether obesity induced by an excess calorie, high fat diet containing hydrogenated fats, fructose, and coconut oil (HFD) altered glucose homeostasis, peripheral immunity, and urogenital microbial dynamics. We hypothesized that HFD would cause hyperglycemia, increase peripheral inflammation, and alter urogenital microbiota to favor bacterial taxonomy associated with inflammation...
2017: PloS One
https://www.readbyqxmd.com/read/28703772/understanding-the-inguinal-sinus-in-sheep-ovis-aries-morphology-secretion-and-expression-of-progesterone-estrogens-and-prolactin-receptors
#20
Graça Alexandre-Pires, Catarina Martins, António M Galvão, Margarida Miranda, Olga Silva, Dário Ligeiro, Telmo Nunes, Graça Ferreira-Dias
Post-parturient behavior of mammalian females is essential for early parent-offspring contact. After delivery, lambs need to ingest colostrum for obtaining the related immunological protection, and early interactions between the mother and the lamb are crucial. Despite visual and auditory cues, olfactory cues are decisive in lamb orientation to the mammary gland. In sheep, the inguinal sinus is located bilaterally near the mammary gland as a skin pouch (IGS) that presents a gland that secretes a strong-smelling wax...
July 13, 2017: International Journal of Molecular Sciences
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