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Estrous cycle

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https://www.readbyqxmd.com/read/27901113/programmed-necrosis-a-new-mechanism-of-steroidogenic-luteal-cell-death-and-elimination-during-luteolysis-in-cows
#1
Takuo Hojo, Marta J Siemieniuch, Karolina Lukasik, Katarzyna K Piotrowska-Tomala, Agnieszka W Jonczyk, Kiyoshi Okuda, Dariusz J Skarzynski
Programmed necrosis (necroptosis) is an alternative form of programmed cell death that is regulated by receptor-interacting protein kinase (RIPK) 1 and 3-dependent, but is a caspase (CASP)-independent pathway. In the present study, to determine if necroptosis participates in bovine structural luteolysis, we investigated RIPK1 and RIPK3 expression throughout the estrous cycle, during prostaglandin F2α (PGF)-induced luteolysis in the bovine corpus luteum (CL), and in cultured luteal steroidogenic cells (LSCs) after treatment with selected luteolytic factors...
November 30, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27899720/luteal-function-during-the-estrous-cycle-in-arginine-treated-ewes-fed-different-planes-of-nutrition
#2
Casie S Bass, Dale A Redmer, Samantha L Kaminski, Anna T Grazul-Bilska
Corpus luteum (CL) functions are influenced by numerous factors including hormones, growth and angiogenic factors, nutritional plane, and dietary supplements such as arginine (Arg), a semi-essential amino acid and precursor for proteins, polyamines, and nitric oxide (NO). The aim of this study was to determine if Arg supplementation to ewes fed different planes of nutrition impacts 1) progesterone (P4) concentrations in serum and luteal tissue, 2) luteal vascularity, cell proliferation, endothelial NO synthase (eNOS), and receptor (R) soluble guanylate cyclase β protein and mRNA expression, and 3) luteal mRNA expression for selected angiogenic factors during the estrous cycle...
November 29, 2016: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/27898936/nutrient-transporters-in-bovine-uteroplacental-tissues-on-days-sixteen-to-fifty-of-gestation
#3
M S Crouse, K J McLean, M R Crosswhite, L P Reynolds, C R Dahlen, B W Neville, P P Borowicz, J S Caton
During early gestation, nutrients are transported to the developing embryo via transporters in the uterine endometrium and chorioallantois. In the present study, we examined glucose transporters and and the cationic AA transporters , , and to test the hypotheses that 1) relative mRNA expression of transporters would be different among uteroplacental tissue type as gestation progresses and 2) concentrations of glucose and cationic AA would be different among target sites (placental compartments, serum, and histotrophic) and days of gestation...
November 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898863/rapid-communication-expression-of-an-endogenous-retroviral-element-during-early-gestation-in-beef-heifers
#4
K J McLean, M S Crouse, M R Crosswhite, D N Black, C R Dahlen, P P Borowicz, L P Reynolds, A K Ward, B W Neville, J S Caton
Endogenous retroviral gene elements have been implicated in development and formation of the feto-maternal interface. A variant of the syncytin endogenous retroviral envelope gene family, , was recently found in ruminants. We hypothesized that mRNA would be differentially expressed in utero-placental tissues and would fluctuate during key time points of early gestation in beef heifers. Commercial Angus crossbred heifers ( = 46; ∼15 mo of age; BW = 362.3 ± 34.7kg) housed in 6-animal pens were fed daily with native grass hay and supplemented with cracked corn to gain 0...
October 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898848/rapid-communication-isolation-of-glucose-transporters-and-in-bovine-uteroplacental-tissues-from-days-16-to-50-of-gestation
#5
M S Crouse, J S Caton, K J McLean, P P Borowicz, L P Reynolds, C R Dahlen, B W Neville, A K Ward
Glucose transporter solute carrier family 2 member 14 () is a duplicon of glucose transporter solute carrier family 2 member 3 () with a 95% shared homology to and has not previously been isolated in ruminant uteroplacental tissues. The transporter has been previously isolated in Holstein heifer uterine epithelium but not in ovine epithelium. We hypothesized that and its duplicon would be found in bovine uteroplacental tissues and that maternal nutrition and day of gestation would impact mRNA expression of and ...
October 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27892874/dynamics-of-the-progesterone-and-cholesterol-concentrations-within-the-bovine-corpus-luteum-cavity
#6
A Rizzo, A L Stefani, M Piccinno, M Roncetti, G D'Onghia, R L Sciorsci
The aim of this study was to examine the concentrations of progesterone (P4) and cholesterol (CHOL) in fluid of cavitary corpus luteum (CL) and in serum of dairy cattle. Cavitary corpora lutea, collected from cows at a local abattoir, were divided in four stages of development, based on days of the estrous cycle (stage I: 1-4days; stage II: 5-10days; stage III: 11-17days; stage IV: 18-20). Fluid of the their cavity was aspirated and P4 and CHOL concentrations were evaluated. The concentrations of P4 in CL cavity fluids were very high (1640-4666...
August 25, 2016: Research in Veterinary Science
https://www.readbyqxmd.com/read/27883962/maternal-care-and-affective-behavior-in-female-offspring-implication-of-the-neurosteroid-gabaergic-system
#7
Amanda P Borrow, Nicole M Cameron
In female rats, the proestrus phase of the estrous cycle is associated with decreased levels of anxiety-like and depressive-like behavior relative to the metestrus phase. Progesterone likely modulate these behaviors, in part through the influence of its metabolite, allopregnanolone (THP) on hippocampal GABAAR subunit expression. As natural variations in maternal care have been found to influence both progesterone levels at proestrus and anxiety-like behavior in female offspring, we sought to investigate the importance of maternal care and the estrous cycle on affective behavior in female rats that had received Low or High levels of licking/grooming (LG) during early life...
November 5, 2016: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/27876896/the-reproductive-toxicity-of-cdse-zns-quantum-dots-on-the-in-vivo-ovarian-function-and-in-vitro-fertilization
#8
Gaixia Xu, Guimiao Lin, Suxia Lin, Na Wu, Yueyue Deng, Gang Feng, Qiang Chen, Junle Qu, Danni Chen, Siping Chen, Hanben Niu, Shujiang Mei, Ken-Tye Yong, Xiaomei Wang
Despite the usefulness of quantum dots (QDs) in biomedicine and optoelectronics, their toxicity risks remain a major obstacle for clinical usages. Hence, we studied the reproductive toxicity of CdSe/ZnS QDs on two aspects, (i) in vivo ovarian functions and (ii) in vitro fertilization process. The body weight, estrous cycles, biodistribution of QDs, and oocyte maturation are evaluated on female mice treated with QDs. The mRNA level of the follicle-stimulating hormone receptor (FSHr) and luteinizing hormone receptor (LHr) in ovaries are assayed...
November 23, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27876215/serological-evaluation-of-ovarian-steroids-of-red-rumped-agouti-dasyprocta-leporina-during-the-estrous-cycle-phases
#9
Michele D Singh, Michael J Morris, Diva Anelie Guimarães, Gregory Bourne, Gary W Garcia
The objective of this study was to evaluate serum progesterone (P4) and 17β estradiol (E2) concentrations throughout the estrous cycle in the red-rumped agouti (Dasyprocta leporina). A total of eight multiparous, captive-bred females were bled throughout their estrous cycle via saphenous venipuncture, with E2 and P4 concentrations being measured via ELISA of the serum collected. Serum E2 ranged from 1212 to 3500pg/ml with a peak value coinciding with observed estrus. However, two additional peak values for E2 were also recorded, one each in metestrus and proestrus respectively...
October 19, 2016: Animal Reproduction Science
https://www.readbyqxmd.com/read/27875754/the-impact-of-diet-and-arginine-supplementation-on-pancreatic-mass-digestive-enzyme-activity-and-insulin-containing-cell-cluster-morphology-during-the-estrous-cycle-in-sheep
#10
F E Keomanivong, A T Grazul-Bilska, D A Redmer, C S Bass, S L Kaminski, P P Borowicz, J D Kirsch, K C Swanson
To determine the effect of feed intake and arginine treatment during different stages of the estrous cycle on pancreatic mass, digestive enzyme activity, and histological measurements, ewes (n = 120) were randomly allocated to 1 of 3 dietary groups; control (CON; 2.14-Mcal metabolizable energy/kg), underfed (UF; 0.6 × CON), or overfed (OF; 2 × CON) over 2 yr. Estrus was synchronized using a controlled internal drug release device for 14 d. At controlled internal drug release withdrawal, ewes from each dietary group were assigned to 1 of 2 treatments; Arg (L-Arg HCl, 155-μmol/kg BW) or Sal (approximately 10-mL saline)...
October 21, 2016: Domestic Animal Endocrinology
https://www.readbyqxmd.com/read/27872713/expression-of-pluripotent-stem-cell-markers-in-mouse-uterine-tissue-during-estrous-cycle
#11
Kolsum Choobineh, Saeed Zavareh, Mojdeh Salehnia, Mohamad Taghi Ghorbanian, Seyed Hassan Paylakhi
It was assumed that uterine stem cells are responsible for the unique regenerative capacity of uterine. Therefore, the aim of the present study was to investigate the expression of the pluripotent stem cell markers in the mice uterine tissue during different stages of estrous cycles. Twelve virgin female NMRI mice (6 to 8 weeks old) were considered at proestrus, estrus, metestrus and diestrus according to the cell types observed in the vaginal smear and underwent hysterectomy operation. Quantitative real-time polymerase chain reaction (PCR) and immunohistochemical staining for pluripotent stem cell markers (SOX2, OCT4, KLF4, and NANOG) were performed...
2016: Veterinary Research Forum
https://www.readbyqxmd.com/read/27871845/inter-generational-effects-of-the-in-vitro-maturation-technique-on-pregnancy-outcomes-early-development-and-cognition-of-offspring-in-mouse-model
#12
N Wang, C E Ren, Y Y Lou, F Le, L Y Wang, X Z Liu, Q T Zhan, L N Mao, H Y Lou, F Jin
In vitro maturation (IVM) of oocytes has been a highly successful method for avoiding the occurrence of severe ovarian hyperstimulation syndrome in some patients during in vitro fertilization. However, the safety of the protocol, especially the long-term effects, is still an issue of debate. The current study is to investigate the long-term effects of IVM on mice through two generations and reveal its inter-generational effects as well. The data indicate that the rates of embryo resorption and fetal death in the F1 generation were significantly increased while the newborn survival rate in the F1 and F2 generations were significantly decreased in the IVM group...
November 18, 2016: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/27865419/gpr39-is-region-specifically-expressed-in-mouse-oviduct-correlating-with-the-zn-2-distribution
#13
Jingqiao Qiao, Huashan Zhao, Ying Zhang, Hongying Peng, Qi Chen, He Zhang, Xueying Zheng, Yaping Jin, Hemin Ni, Enkui Duan, Yong Guo
G-protein-coupled receptor 39 (GPR39) plays a role in cellular and physiological processes, including insulin secretion, cell death inhibition, wound healing, and obesity. Increasing evidence suggests that GPR39 is potently stimulated by zinc ions (Zn(2+)) and is therefore considered a putative Zn(2+) receptor. Given the importance of Zn(2+) in the reproductive system, we proposed that GPR39 might have a functional role in the reproductive system. However, the localization of GPR39 in the reproductive system remains unknown...
January 15, 2017: Theriogenology
https://www.readbyqxmd.com/read/27865418/characterizing-emergence-and-divergence-in-the-first-follicular-wave-in-a-tropically-adapted-bos-taurus-breed
#14
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
https://www.readbyqxmd.com/read/27853050/long-term-changes-in-plasma-anti-m%C3%A3-llerian-hormone-concentration-and-the-relationship-with-superovulatory-response-in-japanese-black-cattle
#15
Hiroki Hirayama, Akira Naito, Shigeo Fukuda, Takashi Fujii, Masatsugu Asada, Yasushi Inaba, Toshiro Takedomi, Masakazu Kawamata, Satoru Moriyasu, Soichi Kageyama
The concentration of circulating anti-Müllerian hormone (AMH) in cattle is a useful endocrine marker for ovarian response to superovulation. Although the AMH concentration undergoes little variation throughout the estrous cycle, its long-term changes remain incompletely understood. Here, we investigated the relationship between superovulation response and plasma AMH concentration in Japanese Black cattle and the long-term changes in plasma AMH concentration of embryo donor cows and heifers. The median, 25th percentile, and 75th percentile of AMH concentrations in 222 mature animals were 0...
November 17, 2016: Journal of Reproduction and Development
https://www.readbyqxmd.com/read/27847429/evaluation-of-salivary-electrolytes-during-estrous-cycle-in-murrah-buffaloes-with-reference-to-estrus-detection
#16
Indu Devi, Pawan Singh, Surerder Singh Lathwal, A Kumaresan, Kuldeep Dudi
AIM: Timely estrus detection is one of the critical factors for increasing reproductive efficiency in buffaloes. In recent decades, saliva has become a more popular as a noninvasive source for determining physiological status of animals by various biochemical electrolytes. This study was designed to assess and correlate changes in different salivary minerals concentration (calcium, inorganic phosphorus, magnesium, sodium, potassium, and chloride) during different stages of the estrous cycle in Murrah buffaloes...
October 2016: Veterinary World
https://www.readbyqxmd.com/read/27845690/characterization-of-the-cervical-mucus-plug-in-mares
#17
Shavahn Loux, Kirsten Scoggin, Mats Ht Troedsson, Edward L Squires, Barry A Ball
The cervical mucus plug (CMP) is believed to play an integral role in the maintenance of pregnancy in the mare, primarily by inhibiting microbial entry. Unfortunately, very little is known about its composition or origin. To determine the proteomic composition of the CMP, we collected CMPs from mares (n = 4) at 9 months of gestation, and proteins were subsequently analyzed by nano-LC-MS/MS. Results were searched against EquCab2.0, and proteomic pathways were predicted by Ingenuity Pathway Analysis. Histologic sections of the CMP were stained with H&E and PAS...
November 14, 2016: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/27845267/protective-effects-and-mechanisms-investigation-of-kuntai-capsule-on-the-ovarian-function-of-a-novel-model-with-accelerated-aging-ovaries
#18
Jinjin Zhang, Li Fang, Liangyan Shi, Zhiwen Lai, Zhiyong Lu, Jiaqiang Xiong, Meng Wu, Aiyue Luo, Shixuan Wang
ETHNOPHARMACOLOGICAL RELEVANCE: Kuntai capsule, a traditional Chinese medicine, has been widely used for the clinical treatment of menopausal syndrome. However, its mechanisms remain poorly understood. Considering that aging ovaries are the primary cause of menopause, this study was designed to investigate the effects and mechanisms of Kuntai capsule on ovarian function in a novel mice model with accelerated aging ovaries. MATERIALS AND METHODS: Seventy-five female C57BL/6 mice were chosen for this study...
November 11, 2016: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/27843090/superovulation-at-a-specific-stage-of-the-estrous-cycle-determines-the-reproductive-performance-in-mice
#19
Wilasinee Inyawilert, Yu-Jing Liao, Pin-Chi Tang
Inconsistent reproductive performance has been reported in superovulated mice. Hence, the aim of this study was to analyze the effect and possible mechanism of superovulation timing on mouse reproductive performance. The results showed that mice superovulated at the metestrous (23.08±6.08%) and diestrous stages (33.33±11.45%) presented significantly lower pregnancy rates compared with those superovulated at the estrous stage (66.67±9.20%). After superovulation at the proestrous and estrous stages, mucin 1 (MUC1) and let-7a/let-7b microRNA (miRNA) expression levels were significantly attenuated and enhanced on embryonic day 3...
December 2016: Reproductive Biology
https://www.readbyqxmd.com/read/27842717/mhc-correlated-preferences-in-diestrous-female-horses-equus-caballus
#20
D Burger, C Meuwly, E Marti, H Sieme, M Oberthür, J Janda, S Meinecke-Tillmann, C Wedekind
Genes of the major histocompatibility complex (MHC) have been shown to influence communication in many vertebrates, possibly with context-specific MHC-correlated reactions. Here we test for MHC-linked female preferences in the polygynous horse (Equus caballus) by repeatedly exposing 19 mares to a group of seven sexually experienced stallions. Each mare was tested four times during two consecutive reproductive cycles, twice during estrus and twice during diestrus. Male plasma testosterone concentrations were determined from weekly blood samples, and equine leukocyte antigen (ELA) class I and II alleles were determined serologically at the end of the experiments...
September 20, 2016: Theriogenology
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