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https://www.readbyqxmd.com/read/29739971/whole-transcriptome-analysis-of-atrophic-ovaries-in-broody-chickens-reveals-regulatory-pathways-associated-with-proliferation-and-apoptosis
#1
Lingbin Liu, Qihai Xiao, Elizabeth R Gilbert, Zhifu Cui, Xiaoling Zhao, Yan Wang, Huadong Yin, Diyan Li, Haihan Zhang, Qing Zhu
Broodiness in laying hens results in atrophy of the ovary and consequently decreases productivity. However, the regulatory mechanisms that drive ovary development remain elusive. Thus, we collected atrophic ovaries (AO) from 380-day-old broody chickens (BC) and normal ovaries (NO) from even-aged egg-laying hens (EH) for RNA sequencing. We identified 3,480 protein-coding transcripts that were differentially expressed (DE), including 1,719 that were down-regulated and 1,761 that were up-regulated in AO. There were 959 lncRNA transcripts that were DE, including 56 that were down-regulated and 903 that were up-regulated...
May 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29698073/surgical-extraction-of-viable-hen-gallus-gallus-domesticus-follicles-for-in-vitro-fertilization
#2
Juan J Perez-Rivero, Angel R Lozada-Gallegos, Jose A Herrera-Barragán
Assisted reproduction techniques in birds have been developed for zootechnical purposes and have been adapted for use in conservation of wild bird species. To develop a technique for obtaining follicles in live hens, 5 Rhode Island red hens ( Gallus gallus domesticus) were anesthetized, and abdominal ultrasound was performed to confirm the presence of ovarian follicles. A left celiotomy then was performed to obtain follicles in different stages of maturation for in vitro fertilization. The follicles were located by digital exploration, then extracted by isolating each follicle with the index finger of each hand, holding it by the stigma, and then applying slight traction towards the exterior of the coelomic cavity until the follicle separated from the ovary...
March 2018: Journal of Avian Medicine and Surgery
https://www.readbyqxmd.com/read/29669131/effect-of-dietary-fructooligosaccharide-supplementation-on-internal-organs-salmonella-colonization-immune-response-ileal-morphology-and-ileal-immunohistochemistry-in-laying-hens-challenged-with-salmonella-enteritidis
#3
Pratima Adhikari, Douglas E Cosby, Nelson A Cox, Monique S Franca, Susan M Williams, Robert M Gogal, Casey W Ritz, Woo K Kim
A study was conducted to evaluate the efficacy of fructooligosaccharides (FOS) in controlling the infection of Salmonella Enteritidis (SE) in White Leghorns. A total of 30 laying hens (white leghorns W-36) were challenged both orally and cloacally with approximately 108 colony-forming units of nalidxic acid resistant SE (SENAR) and divided into 3 treatments: 1) SENAR challenged + 0.0% FOS, 2) SENAR challenged + 0.5% FOS (Nutraflora), and 3) SENAR challenged + 1.0% FOS. SENAR recovery via fecal shedding was measured at 3- and 6-d post-infection (dpi), whereas in the ceca and internal organs, SENAR recovery was measured at 7-d post-infection...
April 13, 2018: Poultry Science
https://www.readbyqxmd.com/read/29599004/pathology-and-distribution-of-velogenic-viscerotropic-newcastle-disease-virus-in-the-reproductive-system-of-vaccinated-and-unvaccinated-laying-hens-gallus-gallus-domesticus-by-immunohistochemical-labelling
#4
A O Igwe, C L Afonso, W S Ezema, C C Brown, J O A Okoye
This study investigated the pathological changes in the reproductive system of laying hens that lead to the poor egg production and quality in Newcastle disease (ND) and the distribution of the virus in the system. Two hundred and forty Isa-Brown pullets were divided randomly into vaccinated and unvaccinated groups (n = 120 each). The vaccinated group was given Hitchner B1 vaccine at 1 day of age, La Sota vaccine at 4 weeks of age and Komarov vaccine at 9 and 16 weeks of age. At the peak of egg production, the laying hens (32 weeks old) were assigned randomly into four groups (n = 60): VC, vaccinated with ND vaccines and inoculated intramuscularly with velogenic viscerotropic ND virus (vvNDV); VU, vaccinated unchallenged; UC, unvaccinated challenged; and UU, unvaccinated unchallenged...
February 2018: Journal of Comparative Pathology
https://www.readbyqxmd.com/read/29541349/grape-seed-proanthocyanidin-extract-prevents-ovarian-aging-by-inhibiting-oxidative-stress-in-the-hens
#5
Xingting Liu, Xin Lin, Yuling Mi, Jian Li, Caiqiao Zhang
Oxidative stress is an important inducement in ovarian aging which results in fecundity decline in human and diverse animals. As a potent antioxidant, grape seed proanthocyanidin extract (GSPE) was investigated to ameliorate chicken ovarian aging in this study. Firstly, ovarian antioxidant capacity of hens at different ages (90, 150, 280, and 580 days old) was compared to elucidate its age-related changes. Subsequently, a D-gal-induced (2.5 mg/mL) aging ovarian model was established and the cultured ovarian tissues were treated with GSPE at 5  μ g/mL for 72 h to evaluate the putative attenuating effects of GSPE on ovarian aging...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29516863/survival-rates-and-the-occurrence-of-larval-malformations-including-siamese-twins-following-fertilization-of-post-ovulatory-aged-oocytes-in-ide-leuciscus-idus
#6
Joanna Nowosad, Mateusz Sikora, Dariusz Kucharczyk
Embryonic development of lower vertebrates can be influenced by many factors, especially when outside of the mother's body and under the influence of variable abiotic and biotic factors. In this study, the effects of fertilization of post-ovulatory aged (overmature) oocytes of ide Leuciscus idus on the risk of developing anomalies in ide larvae were assessed under controlled conditions. There was a negative effect of delayed fertilization of post-ovulatory aged (overmature) oocytes in the ovary on the quality of offspring, which caused reduced survival 3 days post-fertilization and at the hatching stage (68...
March 5, 2018: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/29467246/the-transcriptome-of-early-chicken-embryos-reveals-signaling-pathways-governing-rapid-asymmetric-cellularization-and-lineage-segregation
#7
Young Sun Hwang, Minseok Seo, Bo Ram Lee, Hong Jo Lee, Young Hyun Park, Sang Kyung Kim, Hyung Chul Lee, Hee Jung Choi, Joon Yoon, Heebal Kim, Jae Yong Han
The phylogenomics and comparative functional genomics of avian species were investigated in the Bird 10,000 Genomes (B10K) project because of the important evolutionary position of birds and their value as a research model. However, the systematic profiling of transcriptional changes prior to oviposition has not been investigated in avian species because of the practical difficulties in obtaining pre-oviposited eggs. In this study, a total of 137 pre-oviposited embryos were collected from hen ovaries and oviducts and subjected to RNA-sequencing analyses...
March 14, 2018: Development
https://www.readbyqxmd.com/read/29427807/isolation-and-culture-of-chicken-growing-follicles-in-2-and-3-dimensional-models
#8
Dan Zhao, Imdad Hussain Leghari, Jian Li, Yuling Mi, Caiqiao Zhang
The isolation and culture of ovarian follicles is essential for the studies of follicular development and function. In contrast to the relative ease of culture for mammalian follicles, developing in vitro cultures of high viability for the much larger avian follicles has always proven to be more challenging. In this study, the growing follicles from domestic hens (Gallus domesticus) were isolated using enzymatic and mechanical methods and then investigated for the optimized conditions for culture. Assessments of viability and hormonal responsiveness were also considered...
April 15, 2018: Theriogenology
https://www.readbyqxmd.com/read/29359860/using-titer-and-titer-normalized-to-confluence-are-complementary-strategies-for-obtaining-chinese-hamster-ovary-cell-lines-with-high-volumetric-productivity-of-etanercept
#9
Nuša Pristovšek, Henning Gram Hansen, Daria Sergeeva, Nicole Borth, Gyun Min Lee, Mikael Rørdam Andersen, Helene Faustrup Kildegaard
The selection of clonally derived Chinese hamster ovary (CHO) cell lines with the highest production rate of recombinant glycoproteins remains a big challenge during early stages of cell line development. Different strategies using either product titer or product titer normalized to cell number are being used to assess suspension-adapted clones when grown statically in microtiter plates. However, no reported study so far has performed a direct head-to-head comparison of these two early reporters for predicting clone performance...
March 2018: Biotechnology Journal
https://www.readbyqxmd.com/read/29349677/mercuric-chloride-induced-ovarian-oxidative-stress-by-suppressing-nrf2-keap1-signal-pathway-and-its-downstream-genes-in-laying-hens
#10
Yan Ma, Mingkun Zhu, Liping Miao, Xiaoyun Zhang, Xinyang Dong, Xiaoting Zou
The present study evaluated the effects of mercury chloride (HgCl2 ) on follicular atresia rate, sex hormone secretion, and ovarian oxidative stress in laying hens. Antioxidant enzyme genes and the nuclear factor erythroid 2-related factor 2 (Nrf2)-Kelch-like ECH-associated protein 1 (Keap1) signal pathway were further studied to uncover the molecular mechanism. A total of 768 40-week-old Hy-Line Brown laying hens were randomly allocated to four treatments with eight pens per treatment and 24 hens of each pen...
January 18, 2018: Biological Trace Element Research
https://www.readbyqxmd.com/read/29232906/histology-of-the-ovary-of-the-laying-hen-gallus-domesticus
#11
K Denise Apperson, Karyn E Bird, Gita Cherian, Christiane V Löhr
The laying hen ( Gallus domesticus ) is a robust animal model for epithelial ovarian cancer. The use of animal models is critical in identifying early disease markers and developing and testing chemotherapies. We describe the microscopic characteristics of the normally functioning laying hen ovary and proximal oviduct to establish baselines from which lesions associated with ovarian cancer can be more readily identified. Ovaries and oviducts were collected from 18-month-old laying hens ( n = 18) and fixed in 10% neutral buffered formalin...
December 11, 2017: Veterinary Sciences
https://www.readbyqxmd.com/read/29130738/ethylene-glycol-and-dimethyl-sulfoxide-combination-reduces-cryoinjuries-and-apoptotic-gene-expression-in-vitrified-laying-hen-ovary
#12
Reihane Nateghi, AliReza Alizadeh, Yousef Jafari Ahangari, Rouhollah Fathi, Amir Akhlaghi
Successful cryopreservation of avian gonads is important not only for avian breeding but is also crucial for preservation of species, especially of endangered birds. The aim of this study was to evaluate the effect of vitrification by several cryoprotectants on the ovarian tissues of laying hens. Ovarian tissues were randomly divided into six groups: control (nonvitrified: C), dehydrated using ethylene glycol (EG), dehydrated with propylene glycol (PROH), dehydrated using dimethyl sulfoxide (DMSO), and two combined groups, EG+DMSO and EG+PROH...
December 2017: Biopreservation and Biobanking
https://www.readbyqxmd.com/read/29128632/genome-wide-mapping-of-estrogen-receptor-%C3%AE-binding-sites-by-chip-seq-to-identify-genes-related-to-sexual-maturity-in-hens
#13
Miao Guo, Yi Li, Yuxia Chen, Xiaoli Guo, Zhenjie Yuan, Yunliang Jiang
In ovarian follicle development, estrogen acts as a regulatory molecule to mediate proliferation and differentiation of follicular cells. ERα (estrogen receptor α) exerts regulatory function classically by binding directly to the estrogen response element, recruiting co-factors and activating or repressing transcription in response to E2. In this study, we used ChIP-seq to map ERα-binding sites in ovaries of Hy-line Brown commercial hens at 45d, 90d and 160d. In total, 24,886, 21,680 and 23,348 binding sites were identified in the ovaries of hens at 45d, 90d and 160d, which are linked to 86, 83 and 74 genes, respectively...
February 5, 2018: Gene
https://www.readbyqxmd.com/read/29053818/effect-of-dietary-supplementation-of-nitrocompounds-on-salmonella-colonization-and-ileal-immune-gene-expression-in-laying-hens-challenged-with-salmonella-enteritidis
#14
Pratima Adhikari, D E Cosby, N A Cox, W K Kim
Foodborne disease caused by Salmonella Enteritidis (SE) is one of the important public health and economic concerns. A study was conducted to determine the effect of supplementation with 2-nitroethanol (NE) and 2-nitropropanol (NP) on Salmonella recovery of internal organs as well as on the immune gene expression in the ileum of laying hens. Thirty-six White Leghorns were orally gavaged with nalidixic acid resistant Salmonella Enteritidis (SENR). Hens were housed individually in wire-laying cages and randomly assigned to six dietary treatments: T1 = SENR unchallenged (negative control), T2 = SENR challenged (positive control), T3 = SENR challenged + 100 ppm NE, T4 = SENR challenged + 200 ppm NE, T5 = SENR challenged + 100 ppm NP, and T6 = SENR challenged + 200 ppm NP...
December 1, 2017: Poultry Science
https://www.readbyqxmd.com/read/28986927/effects-of-phyto-oestrogen-quercetin-on-productive-performance-hormones-reproductive-organs-and-apoptotic-genes-in-laying-hens
#15
J X Yang, M T Chaudhry, J Y Yao, S N Wang, B Zhou, M Wang, C Y Han, Y You, Y Li
Quercetin, a polyphenolic flavonoid with diverse biological activities including anti-inflammatory and antiviral, inhibits lipid peroxidation, prevents oxidative injury and cell death. The purpose of the research was to investigate the effect of quercetin on productive performance, reproductive organs, hormones and apoptotic genes in laying hens between 37 and 45 weeks of age, because of the structure and oestrogenic activities similar to 17β-oestradiol. The trial was conducted using 240 Hessian laying hens (37 weeks old), housed in wire cages with two hens in each cage...
April 2018: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/28946009/selection-of-reference-genes-for-quantitative-real-time-pcr-analysis-in-chicken-ovary-following-silver-nanoparticle-treatment
#16
Dorota Katarzyńska-Banasik, Małgorzata Grzesiak, Andrzej Sechman
Reliable results of quantitative real time PCR (qPCR) analysis require normalization of target gene expression level using reference genes (RGs). However housekeeping genes expression may vary under experimental conditions, so selection of the proper RGs is a crucial step in a qPCR analysis. Several algorithms have been developed to address this problem: geNorm, NormFinder and BestKeeper. In this study, we have used these three tools to evaluate the stability of RGs in the ovarian tissues of hens treated with silver nanoparticles...
September 20, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28830648/feasibility-of-corifollitropin-alfa-gnrh-antagonist-protocol-combined-with-gnrh-agonist-triggering-and-freeze-all-strategy-in-polycystic-ovary-syndrome-patients
#17
Jiann-Loung Hwang, Shee-Uan Chen, Hen-Ju Chen, Hsin-Fu Chen, Yu-Shih Yang, Chin-Hao Chang, Kok-Min Seow, Chii-Ruey Tzeng, Yu-Hung Lin
BACKGROUND/PURPOSE: The long-acting corifollitropin alfa is comparable to FSH in terms of pregnancy outcomes in normal responders and poor responders. Corifollitropin alfa has never been studied in polycystic ovary syndrome (PCOS) patients because of concerns of excessive ovarian stimulation and ovarian hyperstimulation syndrome (OHSS). The purpose of the study was to evaluate if corifollitropin alfa can be used in PCOS patients. METHODS: Forty PCOS patients who were going to undergo in vitro fertilization were enrolled in this study...
August 19, 2017: Journal of the Formosan Medical Association, Taiwan Yi Zhi
https://www.readbyqxmd.com/read/28815454/effects-of-se-and-cd-co-treatment-on-the-morphology-oxidative-stress-and-ion-concentrations-in-the-ovaries-of-laying-hens
#18
Jianhong Li, Lu Xing, Runxiang Zhang
This study aims at revealing the effects of the combined treatment of selenium and cadmium on ovary morphology, oxidative stress, and 28 kinds of ion concentrations in laying hens. In this experiment, 128 healthy 31-week-old chickens were selected and divided into four treatment groups, three of which were separately fed the basic diets supplemented with either Se or Cd or both Se and Cd for 90 days, and the remaining group was fed the basic diet and treated as a control. The chickens were sacrificed for collecting ovarian tissues...
August 16, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28814309/performance-biochemical-and-haematological-responses-and-relative-organ-weights-of-laying-hens-fed-diets-supplemented-with-prebiotic-probiotic-and-synbiotic
#19
Shirley Gee Hoon Tang, Chin Chin Sieo, Kalavathy Ramasamy, Wan Zuhainis Saad, Hee Kum Wong, Yin Wan Ho
BACKGROUND: The increasing trend of ban on the use of antibiotic growth promoters (AGPs) across the globe in the poultry industry has led to a growing need for alternatives to AGPs. Prebiotic, probiotic and their combination as a synbiotic have been considered as potential alternatives. This study aimed to investigate the effects of a prebiotic (isomaltooligosaccharide, IMO), a probiotic (PrimaLac®), and their combination (synbiotic) on hen performance, biochemical and haematological responses, and relative organ weights from 20 to 52 weeks of age...
August 17, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28604799/rhythmic-expression-of-circadian-clock-genes-in-the-preovulatory-ovarian-follicles-of-the-laying-hen
#20
Zhichao Zhang, Shuang Lai, Yagang Wang, Liang Li, Huadong Yin, Yan Wang, Xiaoling Zhao, Diyan Li, Mingyao Yang, Qing Zhu
The circadian clock is reported to play a role in the ovaries in a variety of vertebrate species, including the domestic hen. However, the ovary is an organ that changes daily, and the laying hen maintains a strict follicular hierarchy. The aim of this study was to examine the spatial-temporal expression of several known canonical clock genes in the granulosa and theca layers of six hierarchy follicles. We demonstrated that the granulosa cells (GCs) of the F1-F3 follicles harbored intrinsic oscillatory mechanisms in vivo...
2017: PloS One
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