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https://www.readbyqxmd.com/read/28522409/neonatal-exposure-to-17%C3%AE-ethynyl-estradiol-ee-disrupts-follicle-development-and-reproductive-hormone-profiles-in-female-rats
#1
Haolin Zhang, Kazuyoshi Taya, Kentaro Nagaoka, Midori Yoshida, Gen Watanabe
Toxic effects induced by exposure to endocrine-disrupting chemicals during fetal and neonatal periods can be irreversible and exert effects throughout an animal's entire life. Our previous study showed that neonatal exposure to 17α-ethynyl estradiol (EE) induced irregular estrous cycle in adults. To uncover the reason for the delayed effect after neonatal exposure to EE, reproductive parameters including ovarian weight, ovarian steroidogenesis, and hormonal profiles were investigated in developing female rats...
May 15, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/28520870/defining-the-role-of-estrogen-receptor-beta-in-the-regulation-of-female-fertility
#2
Ma Karim Rumi, Prabhakar Singh, Katherine F Roby, Xiao Zhao, Khursheed Iqbal, Anamika Ratri, Tianhua Lei, Wei Cui, Shaon Borosha, Pramod Dhakal, Kaiyu Kubota, Damayanti Chakraborty, Jay L Vivian, Michael W Wolfe, Michael J Soares
Estrogens are essential hormones for the regulation of fertility. Cellular responses to estrogens are mediated by estrogen receptor alpha (ESR1) and estrogen receptor beta (ESR2). In mouse and rat models, disruption of Esr1 causes infertility in both males and females. However, the role of ESR2 in reproductive function remains undecided due to a wide variation in phenotypic observations among Esr2 mutant mouse strains. Regulatory pathways independent of ESR2 binding to its cognate DNA response element have also been implicated in ESR2 signaling...
May 16, 2017: Endocrinology
https://www.readbyqxmd.com/read/28514943/sex-differences-underlying-orofacial-varicella-zoster-associated-pain-in-rats
#3
Crystal Stinson, Mohong Deng, Michael B Yee, Larry L Bellinger, Paul R Kinchington, Phillip R Kramer
BACKGROUND: Most people are initially infected with varicella zoster virus (VZV) at a young age and this infection results in chickenpox. VZV then becomes latent and reactivates later in life resulting in herpes zoster (HZ) or "shingles". Often VZV infects neurons of the trigeminal ganglia to cause ocular problems, orofacial disease and occasionally a chronic pain condition termed post-herpetic neuralgia (PHN). To date, no model has been developed to study orofacial pain related to varicella zoster...
May 17, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28503266/inhalation-toxicity-of-bisphenol-a-and-its-effect-on-estrous-cycle-spatial-learning-and-memory-in-rats-upon-whole-body-exposure
#4
Yong Hyun Chung, Jeong Hee Han, Sung-Bae Lee, Yong-Hoon Lee
Bisphenol A (BPA) is a monomer used in a polymerization reaction in the production of polycarbonate plastics. It has been used in many consumer products, including plastics, polyvinyl chloride, food packaging, dental sealants, and thermal receipts. However, there is little information available on the inhalation toxicity of BPA. Therefore, the aim of this study was to determine its inhalation toxicity and effects on the estrous cycle, spatial learning, and memory. Sprague-Dawley rats were exposed to 0, 10, 30, and 90 mg/m(3) BPA, 6 hr/day, 5 days/week for 8 weeks via whole-body inhalation...
April 2017: Toxicological Research
https://www.readbyqxmd.com/read/28493788/development-of-in-vitro-embryo-production-system-using-collagen-matrix-gel-attached-vascular-endothelial-growth-factor-derived-from-interleukin-1-beta-treated-porcine-endometrial-tissue
#5
Hye-In Han, Sang-Hee Lee, Choon-Keun Park
The aim of this study was to establish an embryo culture system using collagen gel attached with vascular endothelial growth factor (VEGF) derived from interleukin-1 beta (IL-1β)-treated endometrial tissues from pigs. Endometria were separated from the porcine uterus at the follicular phase of the estrous cycle and were cultured with IL-1β. The collagen gels co-incubated with IL-1β-treated endometria (C, without endometrial tissue; CE, with endometrial tissue; and CEI, IL-1β-treated endometrial tissue) were used for embryo culture...
May 11, 2017: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/28488746/corpora-lutea-control-the-progression-of-small-antral-follicle-growth-in-the-pig-ovary
#6
Holly A LaVoie
The growth of activated ovarian primordial follicles into mature preovulatory follicles takes several months in sexually mature pigs. The penultimate growth period of small antral follicles, like the 0.5-mm diameter follicle shown on the upper right, occurs during the luteal phase of the estrous cycle. Small antral follicle growth is limited to 2-4 mm in diameter by the presence of functional corpora lutea, such as the one shown on the lower left. This article is protected by copyright. All rights reserved...
May 10, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/28487952/expression-of-reproductive-hormone-receptors-and-contraction%C3%A2-associated-genes-in-porcine-uterus-during-the-estrous-cycle
#7
Sung-Min An, Sun Suk Kim, Jun Kim, Mee-Na Park, Jae-Eon Lee, Seong Keun Cho, Kyu-Sup Lee, Beum-Soo An
Contraction of uterus tissue frequently occurs throughout the estrous cycle and is regulated by several endogenous factors, including estradiol, progesterone, luteinizing hormone, follicle‑stimulating hormone, oxytocin (OXT) and contraction‑associated proteins (CAPs). Contraction activity of uterus tissue according to the estrous cycle is important, due to the fact that it is directly associated with balanced implantation and stable pregnancy. However, few studies have examined the mechanism of uterus contraction activity in a porcine model...
June 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28473896/changes-in-the-expression-of-oct4-in-mouse-ovary-during-estrous-cycle
#8
Narges Bagheripour, Saeed Zavareh, Mohammad Taghi Ghorbanian, Seyed Hassan Paylakhi, Seyed Reza Mohebbi
The transcriptional factor OCT4 regulates pluripotency of stem cells and has an important role during oocyte growth. Whereas, its role has remained ambiguous in ovarian tissue during reproductive cycle. Therefore, this study was aimed to investigate the expression patterns of OCT4 in mouse ovaries during the normal estrous cycle. Adult National Medical Research Institute mice were classified as proestrous, estrous, metestrous and diestrous on the basis of vaginal smear cytology. Their ovaries were removed and the protein and gene expression levels of OCT4 were assessed using immunohistochemical staining and real-time quantitative reverse-transcription PCR, respectively...
2017: Veterinary Research Forum
https://www.readbyqxmd.com/read/28467682/transcriptional-control-of-genes-mediating-ovarian-follicular-growth-differentiation-and-steroidogenesis-in-pigs
#9
REVIEW
Holly A LaVoie
The pig is an agriculturally important species, so understanding its follicular dynamics and the transcriptional events that accompany such changes is critical to optimizing reproductive outcomes. Numerous small- to medium-size antral follicles are recruited and continue growth under the influence of gonadotropins and growth factors during the follicular phase of the porcine estrous cycle. Several of these follicles are selected to mature into large preovulatory follicles whose granulosa cells acquire luteinizing hormone (LH) receptors...
May 3, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/28460687/non-invasive-hormonal-characterization-of-the-ovarian-cycle-pregnancy-and-seasonal-anestrus-of-the-female-addra-gazelle-nanger-dama-ruficollis
#10
Jessye Wojtusik, Janine L Brown, Budhan S Pukazhenthi
Non-invasive fecal hormone metabolite monitoring was used to characterize the estrous cycle, pregnancy, and seasonal anestrus of the critically endangered addra gazelle (Nanger dama ruficollis). With less than 250 animals remaining in the wild and ∼168 individuals managed in captivity, it is crucial to maintain sustainable populations. Progestogen and estrogen profiles were obtained from analysis of fecal samples collected approximately every other day, within varying intervals, over the course of 7 years (n = 8 adult females)...
June 2017: Theriogenology
https://www.readbyqxmd.com/read/28460675/evaluation-of-shortened-timed-ai-protocols-for-resynchronization-of-ovulation-in-multiparous-holstein-dairy-cows
#11
T Motavalli, E Dirandeh, H Deldar, M G Colazo
The objective was to compare three shortened protocols for timed-AI (TAI) on ovarian responses, pregnancy per AI (P/AI) and pregnancy loss after resynchronization of ovulation in multiparous Holstein cows. Cows (n = 370), at one location, were randomly assigned at non-pregnancy diagnosis (approximately 32 d after AI) to one of three ovulation resynchronization protocols. Cows in the OS group received a 5-d Ovsynch [100 μg GnRH on Day 1, 500 μg cloprostenol (PGF) on Days 6 and 7, GnRH on Day 8.5 and TAI on Day 9 (16 h after second GnRH)]...
June 2017: Theriogenology
https://www.readbyqxmd.com/read/28460667/postpartum-hormone-and-energy-profiles-and-their-influence-on-the-resumption-of-ovarian-cyclicity-in-curraleiro-p%C3%A3-duro-cows
#12
Heitor Castro Alves Teixeira, Eleonora Araújo Barbosa, Paula Lorenna Grangeira Souto, Arthur da Silva Mariante, Alexandre Floriani Ramos
The objective of this study was to evaluate hormone and energy profiles in the postpartum period and to correlate these profiles with the resumption of ovarian cyclicity, as well as characterizing the postpartum short estrous cycle of Curraleiro Pé-Duro cows. Twelve Curraleiro Pé-Duro cows were examined via rectal palpation and ultrasound at 10 days postpartum, and subsequently examined daily to evaluate the resumption of ovarian cyclicity as well as every five days in order to evaluate uterine involution...
June 2017: Theriogenology
https://www.readbyqxmd.com/read/28460665/luteal-dynamic-and-functionality-assessment-in-dairy-goats-by-luteal-blood-flow-luteal-biometry-and-hormonal-assay
#13
Mario Felipe A Balaro, Alex S Santos, Luiz Fernando G M Moura, Jeferson F Fonseca, Felipe Z Brandão
This study aimed to assess the luteal dynamics of pregnant and non-pregnant Saanen goats throughout an estrous cycle by B-mode and color Doppler ultrasonography (US) associated with a P4 hormonal assay. Furthermore, a cutoff point was chosen to determine the corpus luteum (CL) functionality by luteal biometry (LB) measurement and luteal blood flow (LBF) assessment. Ultrasound assessment was carried out daily throughout an entire estrous cycle (21 days) in 23 Saanen goats pre-synchronized and inseminated in the breeding season...
June 2017: Theriogenology
https://www.readbyqxmd.com/read/28460567/human-mesenchymal-stem-cells-partially-reverse-infertility-in-chemotherapy-induced-ovarian-failure
#14
Sara A Mohamed, Shahinaz M Shalaby, Mohamed Abdelaziz, Soumia Brakta, William D Hill, Nahed Ismail, Ayman Al-Hendy
INTRODUCTION: Chemotherapy is the most commonly used modality to treat human cancers; however, in many cases it causes irreversible ovarian failure. In this work, we plan to evaluate the restorative function of human bone marrow mesenchymal stem cells (BMSCs) in a chemotherapy-induced ovarian failure mouse model. METHODS: Acclimatized 4 to 6 week-old female mice (C57BL/6) were assigned randomly to a vehicle-treated control group (group 1), chemotherapy-treated group followed by vehicle alone (group 2), or chemotherapy-treated group followed by stem cell intraovarian injection (group 3)...
January 1, 2017: Reproductive Sciences
https://www.readbyqxmd.com/read/28454689/identification-of-appropriate-reference-genes-for-qpcr-analyses-of-placental-expression-of-slc7a3-and-induction-of-slc5a1-in-porcine-endometrium
#15
Chelsie B Steinhauser, Theodore T Wing, Haijun Gao, Xilong Li, Robert C Burghardt, Guoyao Wu, Fuller W Bazer, Greg A Johnson
INTRODUCTION: Endometria and placentae undergo developmental changes that affect the stability of genes used as references for normalization of qPCR data. We identified genes that are stable within the porcine endometrium and placenta throughout pregnancy, and elucidated the temporal/spatial mRNA localization of the glucose and arginine transporters, solute carrier family (SLC) 5A1 and SLC7A3, respectively. MATERIALS AND METHODS: qPCR was performed for 10 genes within porcine endometria from Days 5, 11, and 15 of the estrous cycle and 11, 15, 25, 40, 60, and 85 of pregnancy; and chorioallantois from Days 30, 35, 45, 50, 60, and 85...
April 2017: Placenta
https://www.readbyqxmd.com/read/28454055/evaluation-of-a-commercially-available-radioimmunoassay-and-enzyme-immunoassay-for-the-analysis-of-progesterone-and-estradiol-and-the-comparison-of-two-extraction-efficiency-methods
#16
C S Skenandore, A Pineda, J M Bahr, A E Newell-Fugate, F C Cardoso
The measurement of progesterone (P4) and estradiol (E2) is essential for monitoring reproductive cycles and can aid in diagnosing the cause of poor reproductive performance in dairy cattle. Readily available, reproducible, accurate, non-radioactive assays are needed for the assessment of P4 and E2 in bovine serum. The gold standard for hormone assessment, radioimmunoassay (RIA), was compared with enzyme-linked immunoassay (EIA). Serum collected from various points in the estrous cycle was extracted with radiolabeled P4 (ie, (3)H-P4; HE) and without (3)H-P4 (CE) before being used in the assay...
April 5, 2017: Domestic Animal Endocrinology
https://www.readbyqxmd.com/read/28447195/salivary-mir-16-mir-191-and-mir-223-intuitive-indicators-of-dominant-ovarian-follicles-in-buffaloes
#17
Prashant Singh, Naresh Golla, Pankaj Singh, Vijay Simha Baddela, Subhash Chand, Rubina Kumari Baithalu, Dheer Singh, Suneel Kumar Onteru
Estrus or sexual receptivity determination is utmost important for efficient breeding programs for female buffaloes. Prominent estrus behavioral symptoms are the result of several molecular and neuroendocrine events involving the ovary and the brain. Expression of estrus behavior is poor in buffaloes during the summer season. Hence, the discovery of biomarkers specific to the estrus stage or its related ovarian events, like the presence of dominant ovarian follicle, is helpful for developing an easy estrus determination method...
April 26, 2017: Molecular Genetics and Genomics: MGG
https://www.readbyqxmd.com/read/28441888/doxorubicin-induced-female-reproductive-toxicity-an-assessment-of-ovarian-follicular-apoptosis-cyclicity-and-reproductive-tissue-histology-in-wistar-rats
#18
Kumari Nishi, Vinoth Prasanna Gunasekaran, Jaganath Arunachalam, Mathan Ganeshan
Doxorubicin is a widely used chemotherapeutic agent for various cancers, particularly for the female breast cancer patients. Although the rate of young female cancer patients is increasing every year, conversely the lack of knowledge of adverse effects of doxorubicin on female reproductive system insisted us to assess the toxic effects of doxorubicin on the female reproductive tissue histoarchitecture, cyclicity, and mammary glands in Wistar rats. The rats were divided into two groups depending on the treatment period, i...
April 25, 2017: Drug and Chemical Toxicology
https://www.readbyqxmd.com/read/28439292/effects-of-bushen-tianjing-recipe-in-a-rat-model-of-tripterygium-glycoside-induced-premature-ovarian-failure
#19
Xiaofeng Xu, Yong Tan, Guorong Jiang, Xuanyi Chen, Rensheng Lai, Lurong Zhang, Guoqiang Liang
BACKGROUND: Bushen Tianjing Recipe (BTR) is a traditional Chinese herbal medicine that has been prescribed for premature ovarian failure (POF) for decades in China. Nevertheless, little is known regarding its underlying molecular mechanism. In the present study, we investigated the effects of BTR in a tripterygium glycoside (TG)-induced-POF rat model. METHODS: Three doses of BTR were administered via intragastric gavage to adult female Sprague-Dawley (SD) rats with TG-induced POF...
2017: Chinese Medicine
https://www.readbyqxmd.com/read/28438170/immunolocalization-of-steroidogenic-enzymes-in-the-vaginal-mucous-of-galea-spixii-during-the-estrous-cycle
#20
Amilton Cesar Dos Santos, Alan James Conley, Moacir Franco de Oliveira, Gleidson Benevides Oliveira, Diego Carvalho Viana, Antônio Chaves de Assis Neto
BACKGROUND: The synthesis of sex steroids is controlled by several enzymes such as17α-hydroxylase cytochrome P450 (P450c17) catalyzing androgen synthesis and aromatase cytochrome P450 (P450arom) catalyzing estrogen synthesis, both of which must complex with the redox partner NADPH-cytochrome P450 oxidoreductase (CPR) for activity. Previous studies have identified expression of steroidogenic enzymes in vaginal tissue, suggesting local sex steroid synthesis. The current studies investigate P450c17, P450aromatase and CPR expression in vaginal mucosa of Galea spixii (Spix cavy) by immuno-histochemical and western immunoblot analyses...
April 24, 2017: Reproductive Biology and Endocrinology: RB&E
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