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https://www.readbyqxmd.com/read/29788420/effects-of-rearing-systems-on-reproductive-hormones-secretion-and-their-receptors-gene-expression-in-xianju-chickens-under-summer-conditions
#1
Z Z Yin, X Y Dong, H Y Cao, H G Mao, Y Z Ma
Previous study in our lab showed that indigenous Xianju chickens from free-range system (FRS) under summer conditions had lower egg production than those from conventional cage rearing system (CRS). The objective of this study was to preliminarily determine the FRS-dependent mechanism of depressing laying performance according to determining the effect of rearing systems on reproductive hormones secretion and their receptors mRNA expression in Xianju chickens reared under summer conditions. A total of 360 indigenous Xianju chickens were randomly allocated to CRS and FRS groups, each of which included 5 replicates of 36 hens...
May 18, 2018: Poultry Science
https://www.readbyqxmd.com/read/29772405/a-transcriptomic-comparison-of-theca-and-granulosa-cells-in-chicken-and-cattle-follicles-reveals-esr2-as-a-potential-regulator-of-cyp19a1-expression-in-the-theca-cells-of-chicken-follicles
#2
Ruoxi Jing, Lantao Gu, Jinqiu Li, Yanzhang Gong
Previous studies have shown that theca and granulosa cell layers in follicles do not play the same roles in mammals and birds, especially regarding the synthesis of estrogen. The functions of these two cell types have been well characterized in cattle, but they remain unclear in chickens. To clarify this issue, a comparison of small yellow follicles (SYFs) in chickens and cattle at different follicular development stages was done by weighted gene co-expression network analysis (WGCNA). The modules obtained from WGCNA were used for further identification of the key genes associated with CYP19A1 expression...
April 28, 2018: Comparative Biochemistry and Physiology. Part D, Genomics & Proteomics
https://www.readbyqxmd.com/read/29762663/population-genomic-data-reveal-genes-related-to-important-traits-of-quail
#3
Yan Wu, Yaolei Zhang, Zhuocheng Hou, Guangyi Fan, Jinsong Pi, Shuai Sun, Jiang Chen, Huaqiao Liu, Xiao Du, Jie Shen, Gang Hu, Wenbin Chen, Ailuan Pan, Pingping Yin, Xiaoli Chen, Yuejin Pu, He Zhang, Zhenhua Liang, Jianbo Jian, Hao Zhang, Bin Wu, Jing Sun, Jianwei Chen, Hu Tao, Ting Yang, Hongwei Xiao, Huan Yang, Chuanwei Zheng, Mingzhou Bai, Xiaodong Fang, David W Burt, Wen Wang, Qingyi Li, Xun Xu, Chengfeng Li, Huanming Yang, Jian Wang, Ning Yang, Xin Liu, Jinping Du
Background: Japanese quail (Coturnix japonica), a recently domesticated poultry species, is important not only as an agricultural product, but also as a model bird species for genetic research. However, most of the biological questions concerning genomics, phylogenetics and genetics of some important economic traits have not been answered. It is thus necessary to complete a high-quality genome sequence as well as a series of comparative genomics, evolution and functional studies. Results: Here, we present a quail genome assembly spanning 1...
May 11, 2018: GigaScience
https://www.readbyqxmd.com/read/29751768/the-preclinical-evaluation-of-immunocontraceptive-vaccines-based-on-canine-zona-pellucida-3-czp3-in-a-mouse-model
#4
Ying Wang, Yijie Li, Beibei Zhang, Fuchun Zhang
BACKGROUND: Stray dogs are the reservoirs and carriers of rabies and are definitive hosts of echinococcosis. To control the overpopulation of stray dogs, zona pellucida 3 (ZP3), a primary receptor for sperm, is a potential antigen for developing contraceptive vaccines. To enhance the immune responses and contraceptive effects of canine ZP3 (cZP3), dog gonadotropin-releasing hormone (GnRH) and a T cell epitope of chicken ovalbumin (OVA) were selected to construct two fusion proteins with cZP3, ovalbumin-GnRH-ZP3 (OGZ) and ovalbumin-ZP3 (OZ), and their contraceptive effects were evaluated in mice...
May 11, 2018: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/29708051/inhibition-of-the-transsulfuration-pathway-affects-growth-and-feather-follicle-development-in-meat-type-chickens
#5
José Humberto Vilar Da Silva, Fernando González-Cerón, Elizabeth W Howerth, Romdhane Rekaya, Samuel E Aggrey
Cysteine is a nonessential amino acid in poultry nutrition. Poultry diets are deficient in cysteine, but the bird's cysteine need is met through the transsulfuration pathway (TSP) where homocysteine is converted to cysteine: a process catalyzed by cystathionine β-synthase (CBS) and cystathionine γ-lyase (CTH). Cysteine is also a major component of keratinized protein found in feathers, but the extent to which cysteine is involved in feather and skin development in poultry is unknown. We randomly assigned chicks to control and treatment (control diet plus 100 mg/kg body weight of propargylglycine which is an inhibitor of CTH) diets...
April 30, 2018: Animal Biotechnology
https://www.readbyqxmd.com/read/29706614/coherent-apoptotic-and-autophagic-activities-involved-in-regression-of-chicken-postovulatory-follicles
#6
Xin Lin, Xingting Liu, Yanfen Ma, Yuling Mi, Weidong Zeng, Jian Li, Caiqiao Zhang
After ovulation in mammals, rupture of mature follicles is reorganized into the corpus luteum that secrets progesterone (P4 ) to stimulate endometrial development. The situation in birds differs considerably. Beyond ovulation the ruptured avian follicle forms a postovulatory follicle (POF) that is not considered analogous to mammalian corpus luteum. The function and regression mechanisms of avian POFs remain poorly understood. Here we investigated the changes in apoptotic and autophagic activities that were involved during POF degradation...
April 29, 2018: Aging
https://www.readbyqxmd.com/read/29695257/comparative-omics-and-feeding-manipulations-in-chicken-indicate-a-shift-of-the-endocrine-role-of-visceral-fat-towards-reproduction
#7
Susanne Bornelöv, Eyal Seroussi, Sara Yosefi, Sharon Benjamini, Shoval Miyara, Mark Ruzal, Manfred Grabherr, Nima Rafati, Anna-Maja Molin, Ken Pendavis, Shane C Burgess, Leif Andersson, Miriam Friedman-Einat
BACKGROUND: The mammalian adipose tissue plays a central role in energy-balance control, whereas the avian visceral fat hardly expresses leptin, the key adipokine in mammals. Therefore, to assess the endocrine role of adipose tissue in birds, we compared the transcriptome and proteome between two metabolically different types of chickens, broilers and layers, bred towards efficient meat and egg production, respectively. RESULTS: Broilers and layer hens, grown up to sexual maturation under free-feeding conditions, differed 4...
April 26, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29672870/genome-wide-association-study-confirms-that-the-chromosome-z-harbours-a-region-responsible-for-rumplessness-in-hongshan-chickens
#8
Q Wang, J Pi, J Shen, A Pan, L Qu
Rumplessness in Hongshan chickens has been reported as a novel sex-linked characteristic. Re-sequencing data suggest that a pseudogene on the Z chromosome, LOC431648, is affiliated with this phenotype. In this study, we chose 23 rumpless and 25 normal Hongshan chickens to localize the potential variation by means of a genome-wide association study using a high density microarray. A region on the Z chromosome was found to be closely associated with rumplessness in Hongshan chickens. The region, located in gene LINGO2, was approximately 3 Mb away from pseudogene LOC431648...
April 19, 2018: Animal Genetics
https://www.readbyqxmd.com/read/29644074/acquisition-of-pluripotency-in-the-chick-embryo-occurs-during-intrauterine-embryonic-development-via-a-unique-transcriptional-network
#9
Jae Yong Han, Hyo Gun Lee, Young Hyun Park, Young Sun Hwang, Sang Kyung Kim, Deivendran Rengaraj, Byung Wook Cho, Jeong Mook Lim
Background: Acquisition of pluripotency by transcriptional regulatory factors is an initial developmental event that is required for regulation of cell fate and lineage specification during early embryonic development. The evolutionarily conserved core transcriptional factors regulating the pluripotency network in fishes, amphibians, and mammals have been elucidated. There are also species-specific maternally inherited transcriptional factors and their intricate transcriptional networks important in the acquisition of pluripotency...
2018: Journal of Animal Science and Biotechnology
https://www.readbyqxmd.com/read/29587836/atrophy-of-primary-lymphoid-organs-induced-by-marek-s-disease-virus-during-early-infection-is-associated-with-increased-apoptosis-inhibition-of-cell-proliferation-and-a-severe-b-lymphopenia
#10
Camille Berthault, Thibaut Larcher, Sonja Härtle, Jean-François Vautherot, Laetitia Trapp-Fragnet, Caroline Denesvre
Marek's disease is a multi-faceted highly contagious disease affecting chickens caused by the Marek's disease alphaherpesvirus (MDV). MDV early infection induces a transient immunosuppression, which is associated with thymus and bursa of Fabricius atrophy. Little is known about the cellular processes involved in primary lymphoid organ atrophy. Here, by in situ TUNEL assay, we demonstrate that MDV infection results in a high level of apoptosis in the thymus and bursa of Fabricius, which is concomitant to the MDV lytic cycle...
March 27, 2018: Veterinary Research
https://www.readbyqxmd.com/read/29583066/naturally-occurring-hair-growth-peptide-water-soluble-chicken-egg-yolk-peptides-stimulate-hair-growth-through-induction-of-vascular-endothelial-growth-factor-production
#11
Toshio Nakamura, Haruo Yamamura, Kyungho Park, Caroline Pereira, Yoshikazu Uchida, Noriko Horie, Mujo Kim, Satoshi Itami
Alopecia is divided into two categories: androgenic alopecia and nonandrogenic alopecia. An androgen-dependent abnormality of biological functions causes alopecia in males, but the role of androgens is not yet elucidated in female pattern hair loss (FPHL). Modulation of androgenic activity is not effective in certain kinds of androgenic alopecia in females, as well as in cases of nonandrogenic alopecia in males and females. The hair growth drug, minoxidil, stimulates vascular endothelial growth factor (VEGF) production as well as vascularization and hair growth in females...
March 27, 2018: Journal of Medicinal Food
https://www.readbyqxmd.com/read/29580080/coronavirus-infection-retards-the-development-of-the-cortico-medullary-capillary-network-in-the-bursa-of-fabricius-of-chicken
#12
Attila Farsang, Ildikó Bódi, Orsolya Fölker, Krisztina Minkó, Zsófia Benyeda, Ádám Bálint, Anna L Kiss, Imre Oláh
Coronavirus infection delays the development of the cortico-medullary (CM) capillary network which results in retarded development of bursal follicles. The smaller size of the medulla in the coronavirus-infected birds may lead to a lower number of B lymphocytes and bursal secretory dendritic cells, which negatively affects the reactivity and efficacy of the immune system. Contrary to the wild-type infectious bronchitis virus (IBV) strain, infection induced by H120 vaccine virus exerts only a moderate influence on caveolin-1 expression of the CM capillary web and on follicular development compared to the untreated controls...
March 2018: Acta Veterinaria Hungarica
https://www.readbyqxmd.com/read/29533759/anti-m%C3%A3-llerian-hormone-receptor-type-2-is-expressed-in-gonadotrophs-of-postpubertal-heifers-to-control-gonadotrophin-secretion
#13
Onalenna Kereilwe, Kiran Pandey, Vitaliano Borromeo, Hiroya Kadokawa
Preantral and small antral follicles may secret anti-Müllerian hormone (AMH) to control gonadotrophin secretion from ruminant gonadotrophs. The present study investigated whether the main receptor for AMH, AMH receptor type 2 (AMHR2), is expressed in gonadotrophs of postpubertal heifers to control gonadotrophin secretion. Expression of AMHR2 mRNA was detected in anterior pituitaries (APs) of postpubertal heifers using reverse transcription-polymerase chain reaction. An anti-AMHR2 chicken antibody was developed against the extracellular region near the N-terminus of bovine AMHR2...
March 14, 2018: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/29438675/involvement-of-matrix-metalloproteinases-mmp-2-7-9-and-their-tissue-inhibitors-timp-2-3-in-the-regression-of-chicken-postovulatory-follicles
#14
Anna Hrabia, Joanna K Socha, Andrzej Sechman
The study was undertaken to examine mRNA expression and localization of selected matrix metalloproteinases (MMPs) and their tissue inhibitors (TIMPs), and the activity of MMPs in chicken postovulatory follicles (POFs) during their apoptotic regression. Apoptotic cells and apoptosis-related caspase expression and activity were examined as well. Chickens were sacrificed 2 h and 21 h after ovulation, and five POFs (POF1 to POF5) were isolated from the ovaries. It was found that the number of apoptotic cells (TUNEL-positive) increased along with follicle regression...
May 1, 2018: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29427807/isolation-and-culture-of-chicken-growing-follicles-in-2-and-3-dimensional-models
#15
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/29409950/tamoxifen-activates-hypothalamic-l-dopa-synthesis-to-stimulate-ovarian-estrogen-production-in-chicken
#16
Yong Mao, Xuan Wu, Li An, Xiao Li, Ze Li, Guiyu Zhu
Estrogen is the primary sex hormone responsible for the development and modulation of the female reproductive system in all vertebrates including avian species. The actions of estrogen are mediated by the estrogen receptor, which could be modulated by the selective estrogen receptor modulator tamoxifen (TAM). In this study, we administered TAM into the actively laying chicken to investigate the ovarian and hypothalamic responses to the estrogen action blockage. The laying was disrupted and the development of the pre-ovulatory hierarchical follicles was arrested...
February 19, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29358656/functional-genomics-study-of-acute-heat-stress-response-in-the-small-yellow-follicles-of-layer-type-chickens
#17
Chuen-Yu Cheng, Wei-Lin Tu, Chao-Jung Chen, Hong-Lin Chan, Chih-Feng Chen, Hsin-Hsin Chen, Pin-Chi Tang, Yen-Pai Lee, Shuen-Ei Chen, San-Yuan Huang
This study investigated global gene and protein expression in the small yellow follicle (SYF; 6-8 mm in diameter) tissues of chickens in response to acute heat stress. Twelve 30-week-old layer-type hens were divided into four groups: control hens were maintained at 25 °C while treatment hens were subjected to acute heat stress at 36 °C for 4 h without recovery, with 2-h recovery, and with 6-h recovery. SYFs were collected at each time point for mRNA and protein analyses. A total of 176 genes and 93 distinct proteins with differential expressions were identified, mainly associated with the molecular functions of catalytic activity and binding...
January 22, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29351308/skin-transcriptome-reveals-the-dynamic-changes-in-the-wnt-pathway-during-integument-morphogenesis-of-chick-embryos
#18
Husile Gong, Hong Wang, YueXing Wang, Xue Bai, Bin Liu, JinFeng He, JiangHong Wu, WangMei Qi, WenGuang Zhang
Avian species have a unique integument covered with feathers. Skin morphogenesis is a successive and complex process. To date, most studies have focused on a single developmental point or stage. Fewer studies have focused on whole transcriptomes based on the time-course of embryo integument development. To analyze the global changes in gene expression profiles, we sequenced the transcriptome of chicken embryo skin samples from day 6 to day 21 of incubation and identified 5830 differentially expressed genes (DEGs)...
2018: PloS One
https://www.readbyqxmd.com/read/29300118/genome-wide-linkage-analysis-identifies-loci-for-testicle-and-ovary-traits-in-chickens
#19
Yanfa Sun, Ranran Liu, Guiping Zhao, Maiqing Zheng, Peng Li, Li Liu, Jie Wen
Development of testes or ovaries is critical to chicken breeders. Understanding the genetic mechanisms influencing the development of the testes and ovaries could enhance selection efforts which target reproductive traits. The linkage analysis was conducted within an F2 population derived from Beijing-You chickens and a commercial broiler line. The results have identified one quantitative trait loci (QTL, designated T1) for bilateral testicular weight (TW) and the percentage of TW to carcass weight, and five QTLs (designated O1-O5) for ovary weight (follicle-free, OW) and the percentage of OW to carcass weight...
January 4, 2018: Animal Biotechnology
https://www.readbyqxmd.com/read/29187833/transcriptome-analysis-on-single-small-yellow-follicles-reveals-that-wnt4-is-involved-in-chicken-follicle-selection
#20
Yiya Wang, Qiuyue Chen, Zemin Liu, Xiaoli Guo, Yanzhi Du, Zhenjie Yuan, Miao Guo, Li Kang, Yi Sun, Yunliang Jiang
Ovarian follicle selection is an important process impacting the laying performance and fecundity of hens, and is regulated by follicle-stimulating hormone (FSH) through binding to its receptor [follicle-stimulating hormone receptor (FSHR)]. In laying hens, the small yellow follicle (6-8 mm in diameter) with the highest expression of FSHR will be recruited into the preovulatory hierarchy during ovarian follicle development. The study of molecular mechanism of chicken follicle selection is helpful for the identification of genes underlying egg-laying traits in chicken and other poultry species...
2017: Frontiers in Endocrinology
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